Mixed Fluid Uniformization Device and Mixed Fluid Feeding Apparatus

(54) Title: MIXED DEVICE FOR UNIFORMING A FLUID AND MIXED FLUID SUPPLY SYSTEM (73) Owner (s): Kawasaki Plant Systems Kabushiki Kaisha (72) Inventor (s): HideakiOta, MasaakiSako (74) Attorney (s): Tinoco Soares & Filho LTDA (86) International Order: PCT JP2005013665 of 26/07/2005 (87) International Publication: WO2007 / 013i43de 01/02/2007 (57) Abstract: MIXED DEVICE TO UNIFORM A FLUID AND FLUID SUPPLY SYSTEM MIXED. Providing a mixed fluid delivery system (1) is presented to provide a mixed fluid in yet another uniform mixed condition; the mixed fluid delivery system (1, includes: mixed gas tubing (4) with secondary gas tubing to supply the primary gas tubing with a secondary gas to mix the secondary gas into a primary gas; and a uniform device the mixed fluid (6) located in the mixed gas pipeline (4); the leveling device (6) includes a stationary perforated plate (8) and movable perforated plate (9) that are superimposed on each other and a cylinder (11) for moving the movable perforated plate (9) in its plane relative to the perforated plate stationary (8); the perforated plates (8) and (9) are each formed with many perforations (10); with (D movement of the movable perforated plate (8), a degree of overlap between the perforations (10) of a perforated plate and the perforations (10) of the other perforated plate changes to vary a proportion of open area of ​​the perforations (10) all together.

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MIXED DEVICE FOR

UNIFORM A FLUID AND FLUID SUPPLY SYSTEM

MIXED

Technical Field

The present invention relates to a mixed fluid equalizer and mixed fluid delivery system. More specifically, the invention relates to mixed fluid equalizer and mixed fluid delivery system comprising plural fluids to further increase the degree of mixing of the mixed fluid and a mixed fluid delivery system to this mixed fluid uniform device.

Technique History

In the field of iron production, for example, the production of pig iron by the blast furnace process allows blast furnace gas (referred to here as

BFG) having a relatively low calorie to be developed as a (low calorie) gas by-product of the blast furnace. BFG is used for various purposes in iron work. These low-calorie by-product gases include not only blast furnace gas, but also other gases, such as converter gas (LDG) and coal mine gas (CMG) and the mixture of these gases. On the other hand, new iron production processes (for example, direct iron reduction processes, including FINEX and COREX), other than the blast furnace process are being developed. For this reason, a combustion method that is applicable even for the

2/44 effective use of by-product gases produced by such processes is expected to be developed.

With any iron production process, the by-product gas produced in this way has properties (including gas and calorie composition) that depend on the system used and the contents of the operation. Even with the same system, the properties of the by-product gas float moment by moment according to the properties of the raw materials and the reaction process and so are not constant. When using by-product gas as a fuel for a combustion system such as a gas turbine, for example, a calorie-reducing gas needs to be mixed into the by-product gas in order to prevent the fluctuating calorific value of the by-product gas from exceeding the upper limit. the variation of the permitted calorific value which is characteristic of the gas turbine, thus avoiding an excessive increase in the combustion temperature in the gas turbine combustor. On the other hand, a calorie-increasing gas has to be mixed in the by-product gas in order to prevent the fluctuating calorific value of the by-product gas from falling from the lower limit to the variation of the permitted calorific value, thus avoiding a flame occurrence outside the turbine's combustor. gas. What's more, the mixed gas resulting from mixing a primary gas (BFG, for example) with calorie reduction or gas rise (referred to here as secondary gas as the case may be) needs to be sufficiently uniform over a cross section of the supply pipe of fuel. That is, it is necessary that the gas

3/44 primary and secondary are sufficiently mixed.

If the mixed gas is not uniform over the cross section of the pipe, it is possible that this non-uniform portion of the mixed gas, as shown, reaches the plural combustors presented in the combustion chamber of the gas turbine, thus causing the plural combustors to burn the gas in a non-uniform combustion condition.

Even in the plural types of mixture of flammable gases that are different in properties (for example, in the mixture of BFG with LDG or CMG) for use of the resulting mixed gas as a fuel, not for the purpose of reducing or increasing average calorie, a sufficient mixing of these gases is necessary.

In a conventional manner, for example, a mixer having a stationary blade for stirring gas in a gas flow pane was used in order to uniformly mix gases that are different in properties, including calories from each other (see document 1 of patent, for example). The purpose of this mixer is to achieve a mixing condition predetermined by all variations in flow rates and respective total calorie of the primary gas and a different type of gas to be mixed as the secondary gas in the primary gas. The mixer is designed to suit mixing conditions including: (1) the flow rate, specific gravity and composition of the primary gas; (2) specific gravity and composition of the secondary gas to be mixed in the primary gas; and (3) the variation

4/44 of the mixing ratio between the primary gas and the secondary gas.

The mixing ratio between the kidney gas and the secondary gas previously determined based on a target value of an increase in the calorific and caloric values ​​of the respective primary and secondary gases. For this reason, when the secondary gas that was initially intended to be used is replaced with another type of calorie-lifting gas, or when the mixing ratio between the primary gas and the secondary gas needs to be modified widely due to a change in value primary gas, it is very difficult for the conventional mixer to ensure that the uniformity in the mixture is within a predetermined variation of the mixing deviation over a cross section of the fuel supply pipeline located below the mixer.

When the calorie of a by-product gas having a caloric value of 800 cal / Nm³ should be increased to 1,000 cal / Nm³ through the use of any coke oven gas (COG), having a calorific value of 4,000 cal / Nm³, the converter tank gas (LDG) having a calorific value of 2,000 cal / Nm³ and natural gas (NG), having a calorific vapor of 9,000 cal / Nm³, which can be selected as calorie-boosting gases, the mixing ratio of the calorie-boosting gas to the primary gas (ie, the aforementioned by-product gas) differs depending on which calorie-boosting gases are used. For example, the mixing ratios of the respective COG, LDG and NG to the gas

Primary 5/44 are 0.05: 1, 0.1: 1 and 0.022: 1, respectively.

When LDg or NG is used as a substitute for COG due to a reduction in the supply of COG as a calorie-increasing gas, the conventional mixer created specifically for COG cannot sufficiently achieve a uniform mixing effect, because the proportion The mixture of this substitute gas is very different from the mixing ratio of COG. Note that KDG, having a relatively low calorie as noted above, can be used when the primary gas is a gas having a lower calorie like BFG.

Even when the mixing ratio of the secondary gas to the primary gas is constant, the flow pattern of the gas inside the mixer changes due to the change in the flow rate of the primary gas. For this reason, even when the secondary gas to be mixed is a single type of gas, it is difficult for the conventional mixer to ensure a predetermined uniformity over a wide variation in the change in the flow rate of the primary gas. Patent Document 1; Japanese Patent Open Publication No. HEI 10-337458

Disclosure of the Invention

Problem to be solved by the Invention

The present invention was made in order to solve the following problems. Consequently, it is the object of the present invention to present a mixed fluid uniformity device to improve uniformity of the mixture by the suitability of various mixing conditions, including different flow rates and

6/44 compositions of a mixed fluid, thus improving the uniformity of the mixed fluid without considering whether the conventional mixer is presented or not (that is, independent of the mixer), as well as a mixed fluid supply system presenting with a uniformization device of the mixed fluid.

Means to solve the Problem

The present invention features a mixed fluid uniformity device comprising plural perforated plates superimposed on top of each other in a manner displaceable to each other in a fluid flow passage, where:

each perforated plate is formed with plural perforations; and with relative displacement of the plural perforated plates on their respective planes as they overlap face to face with each other, a degree of area that almost overlaps between the perforations of a perforated plate and the perforations of another perforated plate changes to vary a proportion open area of ​​all drilling together.

With this arrangement, a secondary fluid is mixed into a primary fluid to adjust the properties of the primary fluid at an upward location of the perforated plates causing resistance to the fluid flow, and then the resulting mixed fluid is further mixed right after passing the fluid. through the perforations. As a result, the mixing is accelerated and, thus, the uniformization of the mixture is accelerated. It is also possible to adjust the proportion of the open area of ​​the perforations to the

7/44 mixing conditions, so as to select a ratio of the optimum open area to the current mixing conditions.

The mixed fluid uniformity device may further comprise a mobile device of the perforated plate located outside the throughflow to move the perforated plates, where:

the plural perforated plates include a stationary perforated plate within the flow passage and a movable non-fixed perforated plate; and the mobile device of the perforated plate is configured to correspond to the mobile perforated plate.

With this arrangement, it is sufficient that only the movable perforated plate is moved. The stationary perforated plate assists in the direction of the movable perforated plate.

Preferably, when the proportion of the open area of ​​the perforations all together is maximum, the perforations all together have an open area that is equal to or greater than the cross sectional area of ​​the flow passage. This feature can reduce the flow resistance of the flow passage to the maximum.

The perforated plates may be inclined with respect to a direction perpendicular to a central axis of the flow passage. In this case, the perforated plates have a larger real area, while the perforations all together have a larger open area.

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Thus, the flow resistance of the flow passage can be reduced to the maximum.

It is possible for the stationary perforated plate to have a movement guide member engaged in opposition to the lateral portions of the movable perforated plate which are situated in a perpendicular direction, for the directional movement of the movable perforated plate.

It is possible that: a mobile perforated plate is interposed between two stationary perforated plates between which a spacer is interposed to maintain a gap between them to allow the mobile perforated plate to slide between the two stationary perforated plates; and the two stationary perforated plates and the spacer are capable of performing a directional motion function of the movable perforated plate.

This feature allows the mobile perforated plate to be guided by the stationary perforated plates positioned in front of and behind the mobile perforated plate, for example, thus making it possible to reduce the thickness and weight of the mobile perforated plate, so as to operate the mobile perforated plate more quickly.

Each of the perforations may have an elongated shape extending in a direction perpendicular to a moving direction of the movable perforated plate. With this feature, the perforations of each perforated plate can have a relatively high proportion of open area and thus the open area of ​​the perforations in a fully open condition can be increased.

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Preferably, the mixed fluid uniformity device further comprises a cleaning device located within the flow passage to clean the perforations, the cleaning device having plural nozzles for spraying a cleaning liquid. This feature makes it possible to clean the perforated plates without the need for an operator to insert the flow passage or with a significantly reduced frequency of the operator entrance.

Perforated plates can be configured so that they can close all perforations by moving the movable perforated plate.

Another mixed fluid uniformization device according to the present invention comprises a perforated plate manufactured with many perforations and located within a fluid flow passage, the perforated plate being able to rotate in any angular position on an imaginary line in a plane of the perforated plate through a center of the perforated plate.

This arrangement can also accelerate the mixing of a mixed fluid. Also, in the event that the fluid flow in the flow passage is urgently interrupted at a downward location of the device to effect excessive pressure fluctuations to propagate towards the upside, the propagation of these pressure fluctuations towards the upside can be suppressed because the rotary perforated plate can increase the

Ι0 / 44 resistance of the flow passage to the fluid flow by rotation in this direction in order to close the flow passage.

The perforated plate can be configured to allow rotation between a full opening position in which the plane of the perforated plate extends along a central axis of the flow passage and a fully closed position in which the perforated plate closes the flow passage. flow. The fully closed position in which the perforated plate closes the flow passage means a position in which the perforated plate, if not formed with any perforation, would block the flow of fluid in the passage. The fully closed position does not mean a position where the perforated plate actually blocks the flow of fluid completely.

A mixed fluid delivery system according to the present invention comprises:

a flow passage allowing a fluid to pass through it; and a mixed fluid uniformity device located in the flow passage, where:

the mixed fluid uniform device is any of the mixed fluid uniform devices described above; and a portion of said flow passage that accommodates the fluid uniformization device mixed in it has a cross-sectional area other than the other portions of the flow passage that are in ascending and descending locations, respectively, of the anterior portion.

In this mixed fluid system, the actual perforated plates are larger, while the perforations have a larger open area. Thus, the flow passage can be maximum.

supply units have an area all together with reduced resistance to

Another mixed fluid delivery system, according to the present invention, comprises:

<td>an</td><td>passage of</td><td>flow</td><td>allowing a</td><td>fluid</td><td>pass by</td>

<td>she;</td><td>and</td><td></td><td></td><td></td><td></td>

<td>one</td><td>device</td><td>in</td><td>standardization of</td><td>fluid</td><td>mixed</td>

<td colspan="3">located in the passage</td><td>flow, where:</td><td></td><td></td>

the mixed fluid uniform device is any of the mixed fluid uniform devices described above; and a portion of the flow passage that accommodates the uniformization device thereon has a cross-sectional area on the downward side and a cross-sectional area on the upward side of the mixed fluid uniformity device; the cross-sectional area on the downward side being greater than the cross-sectional area on the upward side.

This arrangement is expected to have a more intensified mixing effect because the mixed fluid expands and diffuses immediately after passing through the standardization device.

12/44 other system of

A mixed fluid supply according to the present invention comprises:

a flow passage allowing a fluid to pass through it; and a mixed fluid uniformity device located in the flow passage, where:

the mixed fluid uniform device is any of the mixed fluid uniform devices described above; and a flow passage further has a gas detector device in a downward position of the mixed fluid uniformity device to detect a gas property, the gas property detection device being configured to detect a gas component distribution over a cross section of the fluid passage.

With this mixed fluid delivery system it is possible to select an open area ratio suitable for the perforations of the perforated plates to improve the uniformity of the mixture by adjusting the proportion of the open area of ​​the perforations, according to a mixed condition of a detected mixed gas by a device for detecting the property of a gas. The device for detecting the property of a gas may comprise a calorie detection device, for example.

Advantage of the Invention

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The present invention makes it possible to improve uniformity of the mixture under a wide variety of mixing conditions, to improve the uniformity of mixing of a mixing fluid even when a primary fluid and a secondary fluid are mixed, they change in their respective flow rates and compositions.

Brief Description of Drawings

This will be described based on the figures below, in which:

figure 1 is a piping diagram schematically illustrating a mixed fluid delivery system, including a mixed fluid uniform device according to a configuration of the present invention; figure 2 is a vertical sectional view showing schematically a configuration of the mixed fluid uniformity device included in the mixed fluid supply system shown in figure 1; figure 3a is a front elevational view showing schematically another configuration of the mixed fluid uniformity device included in the mixed fluid delivery system shown in figure 1;

figure 3b is a partial partial side elevation view of the mixed fluid uniformity device shown in figure 3a;

14/44 figure 4 figure 5 figure 6 figures figure 8 figure 9 figure 10 is a perspective view showing yet another configuration of the mixed fluid uniformity device included in the mixed fluid supply system shown in figure 1;

it is a sectional view taken on line VV of figure 4;

is a vertical sectional view showing yet another configuration of the mixed fluid uniformity device included in the mixed fluid delivery system shown in figure 1;

7a, 7b and 7c are each a fragmented sectional view showing perforated plates of the mixed fluid uniformity device shown in figure 6;

it is a perspective view showing the perforated plates of the mixed fluid uniformity device shown in figure 6;

it is a sectional view taken on line IX-IX of figure 8;

a vertical sectional view schematically showing yet another configuration of the mixed fluid uniformity device included in the mixed fluid delivery system shown in figure 1;

is a partially cut perspective view of the fluid mixing device mixed figure 11

Mixed 15/44 shown in figure 10; figure 12 is a sectional view taken on line XII-XII in figure 10;

figure 13 is a vertical sectional view schematically showing yet another configuration of the mixed fluid uniformity device included in the mixed fluid delivery system shown in figure 1; figure 14 is a vertical sectional view schematically showing yet another configuration of the mixed fluid uniformity device included in the mixed fluid delivery system shown in figure 1; figure 15 is a vertical sectional view schematically showing yet another configuration of the mixed fluid uniformity device included in the mixed fluid delivery system shown in figure 1; figure 16 is a perspective view showing a perforated plate configuration of the mixed fluid uniformity device shown in figure 15; and figure 17 is a perspective view showing a perforated plate configuration of the mixed fluid uniformity device shown in figure 15.

Reference Character Description

1 ... mixed fluid supply system

16/44

<td> 2 . .</td><td>. .tubing</td><td>in</td><td>gas</td><td>primary</td>

<td> 3 . .</td><td>. . pipe</td><td>in</td><td>gas</td><td>secondary</td>

<td> 4 . .</td><td>. . pipe</td><td>in</td><td>gas</td><td>mixed</td>

5 ... mixing point '6 ... uniformity device (mixed fluid)

7 ... degree of uniformity detector device

8 ... stationary perforated plate

9 ... movable perforated plate

10 ... drilling

11 ... steering cylinder

12 ... connection rod

13 ... sealing mechanism

14 ... guide member

15 ... spacer

16 ... uniformization device (fixed fluid)

... cleaning device

18 ... cleaning liquid supply pipe

19 ... vaporizer 20.. .drilling

21 ... mixed gas pipe

22 ... perforated rotary plate

23 ... tubing

24 ... perforated rotary plate

25 ... rotating shaft

26 ... uniformization device (mixed fluid)

27 ... flange joint

28 ... interrupt plug

29 ... on-off valve

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30 ... control device

31 ... oil controller

32 ... position detection device

... liquid collecting slot

34 ... drain hole

C ... combustion system

5 ... gas supply source

Best Way to Execute the Invention

Hereinafter, a mixed fluid uniformity device and a mixed fluid delivery system according to a configuration of the present invention will be described with reference to the accompanying drawings.

Figure 1 illustrates a mixed fluid delivery system 1 as a configuration of the present invention. The supply system 1 is configured to provide a gas turbine with a fuel comprising a by-product gas having a floating calorie that is produced by a gas supply source S such as a blast furnace or a direct iron reduction system. Examples of these delivery systems include: a fuel gas delivery system of the type configured to mix types of by-product gases that are different in properties from one another and supply the resulting mixed gas; and a fuel gas delivery system of the type configured to mix this fuel gas with a calorie reducing gas comprising an inert gas or

18/44 calorie comprising COG or the like and providing the resulting mixed gas. The aforementioned gas source incorporates a mechanism for carrying out a treatment process, such as a dust filtering process, necessary for a gas produced to be supplied as a fuel. Fluids that can be supplied by the mixed fluid delivery system of the present invention include liquids, powders, pasty cement and the like without limiting gases. In the following configuration, the gas is used as a fluid for illustration.

The mixed fluid delivery system 1 includes: primary gas piping 2 for supplying a primary gas produced by the gas supply source S; secondary gas piping 3 connected to primary gas piping 2 to mix a reducing or calorie-increasing gas; mixed gas piping 4 extending downwardly to the joint 5 between piping 2 and piping 3 (hereinafter referred to as mixing point as the case may be) to supply a mixed gas comprising the primary gas and the secondary gas; and a mixed fluid equalization device (referred to here as simply uniformization device, as the case may be) 6 located in the mixed gas pipeline 4. The secondary gas pipeline 3 supplies the secondary gas in order to stabilize the fluctuating properties of the primary gas (including fluctuating calories, for example).

In cases where the gas uniformly mixed by the uniformization device 6 is a

19/44 fuel gas C as a gas turbine combustor. Each of the pipes 2, pipe 3 and pipe 4, can comprise a pipe having an elliptical and polygonal cross-sectional shape without limitation to a circular cross-sectional shape. The aforementioned secondary gas pipe 3 can be this pipe to feed two or more types of secondary gases to the same mixing point 5 and mix these gases with the primary gas at the same time or this pipe to comprise many secondary gas pipe lines that are connected to the primary gas pipe 2 at the different points.

The mixed gas pipeline 4 can be presented with a device for detecting the property of a gas 7 in a downward position of the uniformization device 6 to detect the degree of uniformity of the mixed gas mixture flowing in the mixed gas pipeline 4.

Figure 2 shows the uniform device 6. The uniform device 6 includes two perforated plates 8 and 9. Each of the perforated plates 8 and 9 is formed with multiple perforations 10. Although there is no limitation regarding the diameter of each perforation 10 or the height with which perforations 10 are arranged, perforations 10 preferably have an equal diameter and are arranged with equal height, because the proportion of the open area of ​​these perforations 10 can be easily adjusted. A perforated plate 8 has a shape that extends to

20/44 strictly fits the flow passage of the mixed gas pipe 4 (otherwise stated, a way to close the flow passage of the mixed gas pipe 4 if the plate has no perforations) and has a fixed periphery to an inner surface of the tubing forming the mixed gas tubing 4. Thus, perforated plate 8 will be referred to as stationary perforated plate 8. The shape of the stationary perforated plate 8 is adapted to a sectioned shape of the flow passage of the mixed gas pipe 4. The other perforated plate 9 is positioned in contact with the rising side of the stationary perforated plate 8 so that it can alternate in the plane of it. Thus, the perforated plate 9 will be referred to as movable perforated plate 9.

The mobile perforated plate 9 has a final portion connected to a mobile device of the perforated plate comprising a steering cylinder 11 as a hydraulic cylinder, located outside the mixed gas tubing 4. The mobile perforated plate 9 is matched by the steering cylinder 11. A connecting rod 12, interconnecting a rod 11a of the steering cylinder 11 and the movable perforated plate 9 extends through the wall of the mixed gas pipe 4. The portion of the pipe wall 4, through which the connecting rod 12 extends, is provided with a sealing mechanism 13. The movable perforated plate 9 can be positioned on a downward side of the stationary perforated plate 8 without limitation to the rising side perforated stationary plate 8. The

The mobile device of the perforated plate may comprise an electric motor or the like without limitation to the hydraulic cylinder.

hydraulic cylinder 11 can be located above the mixed gas line 4 in order to raise and lower the movable perforated plate 9 in a suspended condition, without limitation to the location below the mixed gas line 4 as shown. Alternatively, the steering cylinder 11 can flank the mixed gas tubing 4 so as to correspond horizontally to the movable perforated plate 9. The cylinder 11 can be positioned anywhere between the locations above and below the mixed gas pipeline 4.

The portion of the mixed gas pipeline 4 that accommodates the aforementioned uniformization device 5 can be configured to be removable from the mixed gas pipeline 4. For example, it is possible for the tubing forming the mixed gas tubing 4 to be cut at the front and rear parts of the uniforming device 6 and the resulting cut-out portion is connected to the front and rear portions of the mixed gas tubing 4 through the pipe joints like flanges. When the flange joining rivets are removed, the tubing section accommodating the uniformization device 6 can be moved externally together with the steering cylinder 11 and the like. In doing so, maintenance of the uniforming device 6 can be easily conducted during the periodic inspection of the system.

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In each of the perforated plates 8 and 9, the perforations 10 are formed so as to have a central distance equal to or greater than the diameter of each perforation 10. With the perforations 10 thus formed, the perforated plates 8 and 9 can take a desired position (that is, a desired open area ratio) between a total open position where all the perforations 10 of a perforated plate coincide with the corresponding perforations of the other perforated plates to have a 100% open area proportion and a fully closed position in which any of the perforations 10 of a perforated plate does not overlap the corresponding perforation of the other perforated plate in order to present a proportion of 0% of open area, when the movable perforated plate 9 [L1] stops at a desired position as a result of its reciprocity over predetermined distance. This characteristic will be apparent in figures 7 (a) and 7 (c) showing a standardization device 16 provided with three perforated plates to be described later. In order for the movable perforated plate 9 to be movable by a predetermined distance, the movable perforated plate 9 has a smaller external size than the stationary perforated plate 8.

A proportion of maximum open area is not particularly limited to a proportion of 100% open area where the total area of ​​the perforations 10 is open. For example, a maximum open condition can be a condition where 100% of the total perforation area is not reached. A minimum open area

23/44 is particularly limited to a 0% open area proportion where the total area of ​​the perforations 10 is closed. For example, a minimum open condition may be in a condition where an open area proportion slightly exceeds 0% of the total perforation area (that is, a slightly open condition). With these configurations, the distance from the center of the perforations 10 need not be greater than the diameter of each perforation 10.

purpose of the arrangement described above capable of modifying the proportion of open area of ​​the perforated plates 8 and 9 is to allow an optimal mixture to be

<td>fulfilled</td><td>under</td><td>the conditions for</td><td>mixture</td><td>to mix the</td><td>gas</td>

<td>primary</td><td>it's the</td><td>secondary gas</td><td>through</td><td>of modification</td><td>gives</td>

<td>proportion</td><td>in</td><td>open area for</td><td>suit</td><td>to conditions</td><td>in</td>

mixture. Perforated plates 8 and 9 first block a portion of the mixed gas fed to the perforated plates 8 and 9 through the mixed gas pipe 4 to produce flow components perpendicular to the central axis of the pipe. The mixed gas is further mixed through this action. The mixed gas passing through the perforated plates 8 and 9 produces diffusion expirals through the jets of the perforations 10 towards the descending side, thus realizing, more uniform mixture; through this mechanism, the mixing of the mixed gas continues, still, to realize a uniform mixture.

The aforementioned degree of uniformity detection device 7, located downward from the uniformization device 6, can

24/44 comprise a calorie detection device configured to detect a calorie distribution of gas over a cross section of the gas flow passage of the mixed gas pipeline 4. In order for the uniformity detection device 7 to serve the For that purpose, the multiple sensing sections 7a of the calorie sensing device simply need to be arranged substantially over a cross section of the passageway. The multiple detection sections 7a can be arranged in many cross sections as shown without limitation to a single cross section.

Examples of this calorie detection device 7 used herein include the so-called calorimeter to directly measure the calorie of the gas, a device for measuring the content (density) of a flammable component and other types of devices. In cases where the speed of detection is important, it is preferable to use a flammable gas density detection device (gas component detection device). According to a main flammable component contained and a low-calorie gas, or the type of flammable component that generates a higher density fluctuation (for example, carbon monoxide among the by-product gases produced by the direct iron reduction process), a density detection device to detect the density of this component that can be used. The degree of uniformity detection device is not limited to these calorie detection devices. The various devices

25/44 suitable for detecting the properties of the gas can be employed including, for example, a density detection device to detect a gas distribution over a cross section of the gas flow passage.

A suitable open area ratio to improve uniform mixing can be selected by adjusting the open area ratio of the perforations 10 of the perforated plates 8 and 9 mentioned above according to the mixed condition of the mixed gas detected by the detection device 7. 0 leveling device 6 is provided with a control device 30 to realize this proportion of suitable open area, an oil controller 31 to adjust the time of the cylinder rod 11a by controlling the amount of hydraulic oil to be supplied to the steering cylinder 11 and a position detection device 32 for detecting the expanded / retracted position of the cylinder rod 11a.

The control device 30 stored a table relating a mixing ratio of each of the secondary gases (volume ratio of the secondary gas to the primary gas) to an optimal proportion of the open area corresponding to the perforated plates with the types of secondary gases used as parameters . In addition, control device 30 has stored positions that can be taken by a detected portion of the cylinder rod 11a as the movable perforated plate 8 moves from the fully open position as a reference position to a fully closed position, as well as the necessary quantities of Oil

26/44 hydraulic for the movable perforated plate 8 to move between the fully open position and the fully closed position.

control device 30 selects the calorie reducing gas to prevent the measured caloric value of the primary gas from exceeding the maximum allowable limit value established for the combustion system and at the same time calculates a required mixture amount of the reducing gas calorie, on the basis of which the control device 30 provides an instruction of the quantity of mixture to a secondary gas supply system (not shown). Alternatively, the control device 30 selects the calorie-increasing gas to prevent the measured caloric value of the primary gas from falling below the minimum permitted limit value established for the combustion system and at the same time calculates a required amount of mixture of the calorific increase gas, on the basis of which the control device 30 provides an instruction of the quantity of mixture to a secondary gas supply system. In cases where the many types of calorie-boosting gases and many types of calorie-reducing gases are presented, the control device 30 selects a suitable gas according to a predetermined criterion and calculates a required mixture amount of the selected gas.

Subsequently, the control device 30 reads the open area ratio of the perforated plates corresponding to a mixing ratio

27/44 of the secondary gas to the primary gas in the table, calculates a movement of the movable perforated plate 9 based on the value read and controls the supply of hydraulic oil to the cylinder in order to realize the proportion of target open area of ​​the perforated plates. When the mixing ratio of the secondary gas is relatively low, for example, an action such as lowering the open area ratio, or similar action, is taken. The measurement cycle of the separation between the calorific value and the target calorific value of the mixed gas is preferably longer than the detection time of the calorific value.

In cases where the degree of uniformity of the gas mixed in a downward position of the uniformization device 6 through the uniformity detection device 7, it is possible to carry out a return control by returning the detected value.

In this case, if the system can become unstable due to frequent adjustment to the movable perforated plate, the uniformity detection device 7 can be used mainly as a means of monitoring the uniformity degree.

The portion of the mixed gas piping 4 that accommodates the uniformity detection device 7 can be configured to be removable from the mixed gas pipeline 4. This removable configuration can be accomplished through the use of a pipe joint, such as flanges , such as the removable configuration of the previously mentioned uniformization device 6. This

28/44 removable configuration allows maintenance and calibration of the device to detect the degree of uniformity Ί to be easily achieved.

Each of the perforations 10 5 can be created in the shape of an ellipse, a polygon, including a square or rectangle, or any shape without limiting to a circle. The elongated perforations 20 as shown in figure 3 can also be used. These elongated perforations 20 extend perpendicular to the direction of movement of the movable perforated plate 9 and are separated from each other in the direction of movement. Preferably, the perforations 20 are equally spaced from one another. Although figure 3a shows the perforations 20 of the movable perforated plate 9 only, it goes without saying that the movable perforated plate 8 is formed with many perforations which are each equal in size and shape to a corresponding perforation 20. Provided that the area of ​​each perforated plate is invariant, the provision of these elongated perforations 20 is more preferable than the provision of multiple circular or square perforations 10, because the perforated plates have a larger open area when in the fully open position.

If the mixed gas pipeline 4 has a constant internal diameter of the pipeline along its longitudinal axis, the open area of ​​the perforated plates 8 and 9 is smaller than the cross sectional area of ​​the throughflow defined by the mixed gas pipeline 4 even when the proportion of the open area of

29/44 perforated plates 8 and 9 is 100%. However, the perforated plates 8 and 9, when in the fully open position, preferably have the largest open area possible to reduce pressure loss. For this purpose, the portion of the mixed gas pipe 4 that accommodates the uniformization device 6 defines a flow through having a larger cross-sectional area than the portions extending upwards and downwards from that portion, as shown in figure 2. That is, the mixed gas pipe 4, according to the present configuration, has a circular cross-section and, therefore, the portion of the mixed gas pipe 4 that accommodates the uniformization device 6 has a larger pipe diameter. As a result, the perforated plates 8 and 9, when in the fully open position. Consequently, the perforated plates 8 and 9, when in a fully open position, have an enlarged open area that can be equal to or greater than the cross-sectional area of ​​the flow of each upward and downward side portion of the gas pipe. mixed 4.

While the extended diameter portion of the mixed gas pipe 4 has a diameter equal to the portions located before and behind the uniformization device 6, according to the present configuration, there is no limitation to this structure. Optionally, the portion of the mixed gas supply pipe 4 which is located immediately behind (downward) the uniformization device 6 may have a larger pipe diameter than the portion of the gas pipeline

30/44 mixed gas 4 which is located immediately before (upward) the uniformization device 6. This structure causes the mixed gas to expand and diffuse immediately after passing through the uniformization device 6, so that the mixing effect can be improved.

The open area of ​​the perforated plates 8 and 9 can be further increased by forming the perforated plates 8 and 9 so that the perforated plates 8 and 9 can be positioned as inclined with respect to a plane perpendicular to the central axis of the mixed gas pipe 4, as shown in figure 2. When the perforated plates 8 and 9 are shaped (elliptical) so that the perforated plates 8 and 9 in an extended inclined position closely match the flow passage of the mixed gas pipe 4, the actual area of ​​each perforated plate can be increased to have a larger number of perforations 10. Assuming that the perforations 10 having the same size and shape sound at an equal height on each perforated plate and the perforated plates 8 and 9 are inclined at an angle of θ relative to the plane perpendicular to the central axis of the mixed gas pipe 4, the actual area of ​​the perforated plates is increased 1 / cos Θ times and therefore the number of perforations 10 is increased by around 1 / cos θ times. This applies to the entire open area of ​​the perforated plates.

In this case, each of the perforations 10 of the perforated plates 8 and 9, preferably, extend through the perforated plate to the

31/44 along the central axis of the mixed gas pipe 4 (in the direction of the fluid flow) as shown in figure 2, because the flow resistance of the perforated plates 8 and 9 are formed so as to extend across the perforated plate in an inclined direction relative to the direction perpendicular to the plane of the perforated plate and thus the machining cost will increase in the case where a reduction in the machining cost is important, the perforations 10 of each of the perforated plates 8 and 9 can be formed so that they extend through the perforated plate in the direction perpendicular to the plane of the perforated plate.

As shown in figures 4 and 5, the movable perforated plate 8 is presented with a guide member 14 to direct the movement of the movable perforated plate 9. The guide member 14 comprises a pair of members having an L-shaped section that are mounted on the side of the movable perforated plate 8 facing the movable perforated plate 9 at opposite side portions (i.e., at opposite end portions located in directions perpendicular to the direction of movement of the movable perforated plate 9). The guide member 14 and the movable perforated plate 8 engage between the opposite side portions of the movable perforated plate 9 in order to guide the sliding of the movable perforated plate 9. In figure 4, the movable perforated plate 8 and the movable perforated plate 9 are shown. with their respective planes vertically positioned, that is, perpendicular to the central axis of the mixed gas pipe 4.

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In the leveling device in figure 4, the steering cylinder 11 is connected to an upper portion of the movable perforated plate 9 in order to move the movable perforated plate 9 in a condition suspended from the steering cylinder 11. The connecting portion between the rod 11a of the steering cylinder 11 and the movable perforated plate 9 is shown in detail in figure 4. The connecting rod 12 attached to the movable perforated plate 9 and connected to the cylinder rod 11a by a pin connection.

connection mechanism shown is for illustrative purposes only and should not be constructed to exclude any other connection mechanism. The seal mechanism 13 is not shown in figure 4.

Figures 6 to 9 show a leveling device 16, comprising three perforated plates. Specifically, the smoothing device 16 comprises two stationary perforated plates 8 positioned parallel to each other, separated from each other by spacers 15 between them and a single movable perforated plate 9 between the two stationary perforated plates 8. The spacing between the stationary perforated plates 8 is substantially equal to the thickness of the movable perforated plate 9. As with the previous uniformization device 6, between the triple plates 8, 9, the perforations 10 of a perforated plate have the same size, shape and arrangement perforations 10 of another perforated plate. It is possible that the stationary perforated plates 8 are positioned so that the perforations 10 of a

33/44 stationary perforated plate 8 are facing the corresponding perforations 10 of the other, as shown. With this feature, when the leveling device 16 assumes its fully open position as a result of the movement of the movable perforated plate 9, the perforations 10 of the movable perforated plate 9 become completely coincident with the perforations 10 of the stationary perforated plates 8 as shown in figure 7a, so that the proportion of the open area of ​​the perforations 10 reaches 100%. By moving the movable perforated plate 9 from the full opening position by a distance equal to the diameter d of each perforation 10, all perforations 10 are completely closed (figure 7c), so that the proportion of the open area reaches 0%. Figure 7b shows a state in proportion to the intermediate open area.

As shown in figures 8 and 9, the spacers 15 are located between the two stationary perforated plates 9 [L2] on opposite sides and separated from each other by a distance substantially equal to the width of the movable perforated plate 9. With this structure, the spacers 15 and the two stationary perforated plates 8 function as a guide member to direct the movement of the movable perforated plate 9.

As the two sides of the movable perforated plate 9 are held between the two stationary perforated plates 8, the thickness of the movable perforated plate 9 can be reduced without any danger of bending. As a result, it is possible to reduce the weight of the plate

34/44 perforated, simplify the steering mechanism and improve accuracy when establishing proportions of open area.

The perforation arrangement is not limited to a grid pattern as described above (see figures 4 and 8) or a vertical arrangement of many elongated perforations (see figure 3). For example, it is possible to employ an arrangement of perforations located in many equally spaced concentric imaginary circles. In this case, the stationary perforated plate 8 is simply configured to rotate around the center of the imaginary circles. Consequently, the perforations in each imaginary circle are equally spaced from one another, but the spacing between the adjacent perforations decreases in an imaginary circle located closer to the axis of rotation.

Figures 10 and 12 show the leveling device 26 provided with a cleaning device 17, in a downward position of the perforated plates 8 and 9 for cleaning the opposite surfaces and perforations 10 of the perforated plates 8 and 9. The cleaning device 17 according to the present configuration has a cleaning liquid supply pipe comprising many supply pipes that are substantially opposite the descending side surface of the movable perforated plate 9 and extend substantially horizontally with vertical spacing between them. Each of the pipes forming the cleaning liquid supply pipe 18 is provided with many spray nozzles 19 spaced from each other. As shown in figure 11, the many

35/44 supply of cleaning liquid supply pipe 18 are branched from a single pipe. Each of the pipes of the branch 18 is connected to the mixed gas pipe 4 by a flange joint 27 and has a downward side end with a stop plug 28. The cleaning liquid supply pipe 18 is provided with an on / off valve 29 on an ascending side of this. The on / off valve 29 can be configured to automatically rotate so that it can be opened or closed intermittently during the period during which the mixed gas supply is stopped. The guide member 14 and the steering cylinder 11 are not shown in figure 11.

From the point of view of the cleaning effect, it is preferable that the spray nozzles 19 are equal in number to the perforations 10 and positioned in a one-to-one relationship with perforations 10. However, there is no limitation to this characteristic. For example, nozzles 19 simply have to be arranged so that the cleaning liquid can be vaporized, relatively, extensively from each nozzle 19, while the largest possible number of perforations 10, including the topmost perforations 10 sprayed with the cleaning liquid. The cleaning effect can also be achieved by the cleaning liquid flowing down the perforated plates 8 and 9. In addition, the many pipes of the cleaning fluid supply pipe 18 can be easily swiveled around their respective central axes in order to adjust

36/44 the direction of each nozzle 19 upwards and downwards. The mixed gas piping 4 can be provided with a visual inspection window allowing the operator to visually check the cleaning device 17 and the perforated plates 8 and 9. The provision of the visual inspection window makes it possible to adjust the direction of each nozzle 19 by rotating the associated pipe of the cleaning liquid supply pipe 18 in order to optimize the vaporization angle of the cleaning liquid for the cleaning condition thus verified, when required.

There is no limitation on the number of spray nozzles 19 shown. It is possible to employ a single nozzle to the cleaning liquid very extensively. In this case, the cleaning liquid supply line 18 comprises a supply line. It is possible that the liquid collection groove 33 is presented in a lower portion of the mixed gas pipe 4 which is located adjacent to the cleaning device 17 to collect the used cleaning liquid while a drain hole presented in the bottom of the groove for collecting a liquid 33 for draining a collected drainage liquid (figure 10).

The location of the cleaning device 17 is not limited to the downward location of the perforated plates 8 and 9, but the cleaning device 17 can be in an upward position of the perforated plates 8 and 9 or on the opposite upward and downward sides of the perforated plates 8 and 9 . In cases where the perforated plates .37 / 44 and 9 are angled as shown in figure 2 or 6, unlike the arrangement shown in which the perforated plates 8 and 9 are positioned vertically, the cleaning device 17 is preferably located on the side upwardly oriented of the perforated plates 8 and 9 (on the right side of the perforated plates shown in figure 2 or 6). This is because the cleaning effect can be enhanced by the vaporized cleaning liquid running down the surfaces of the perforated plates as compared to the case where the cleaning device 17 is located on the downwardly oriented side of the perforated plates and 9.

The provision of the cleaning device 17 makes it possible to prevent the flow resistance of the flow passage from increasing due to dust and the like deposited on the perforated plates or at the peripheral limit of each perforation and to prevent the formation of the so-called sticky effect of the perforated plates. Thus, it is possible to eliminate the need to clean the uniformization device 6 by inserting the tubing by the operator during stops of the mixed fluid supply system 1 or to reduce the frequency of this cleaning considerably.

As in the previous case, the portion of the mixed gas pipe 4 that accommodates the cleaning device 17 can be configured to be removable from the rest of the mixed gas pipe 4 through the use of pipe connection, such as a flange joint.

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This removable configuration allows maintenance of the cleaning device 17 to be easily achieved.

Figure 13 shows another configuration of the mixed gas pipe 21. The mixed gas pipe 21 comprises two pipes 21a and 21b extending parallel to each other and a short pipe 21c extending perpendicularly to the interconnected end portions of pipes 21a and Respective 21b. The purpose of this configuration is to sufficiently widen the area of ​​the flow passage defined by the portion 21c of the mixed gas pipe 21 that accommodates the uniformization device 6 by a simple structure. Although the two pipes 21a and 21b can be positioned horizontally parallel to each other, the shown vertical parallel arrangement is preferable because the perforated plates 8 and 9 are positioned substantially horizontally in the pipe 21c extending vertically. With the perforated plates 8 and 9 thus positioned, the movable perforated plate 9 is placed on an upper side of the stationary perforated plate 8 and can then move steadily. There is no limitation to the illustrated configuration of the mixed gas pipeline 21 to allow the mixed fluid to flow upwardly from below the standardizing device 6, but this configuration can be employed so that the pipe 21a extends upwardly to the standardizing device 6 above tubing 21b extending downwardly from the unifying device 6 to allow the mixed fluid to drain

39/44 downwardly from the leveling device 6.

Unlike the configuration shown where the two pipes 21a and 21b are interconnected by a short inclined pipe 21d extending at an obtuse angle relative to the central axes of the respective pipes 21a and 21b as shown in figure 14. This configuration allows pressure loss in the pipe to be reduced. Furthermore, as the perforated plates 8 and 9 are positioned obliquely relative to the central axis of the inclined short pipe 21d, the perforated plates 8 and 9 have an increased real area relative to the cross sectional area of ​​the pipe reducing the flow resistance of the perforated plates 8 and 9.

Each of the standardization devices 6 and 16 has an advantageous function other than the fuel gas uniformization mixing function. This function is performed when the standardization device is presented in a pipe configured to supply a combustible gas to a combustion system such as a gas turbine, for example. When urgently stopping this combustion system, a shut-off valve shown on the fuel gas supply line is closed to stop the fuel gas supply in an instant. As a result, excessive pressure fluctuations caused by excessive changes in the moment of the fuel gas flow propagated towards the rising side of the fuel gas supply pipe. This pressure spread

40/44 or deflected by a rapid reduction or interruption of the proportion of the open area of ​​the standardization devices 6 and 16 in a timely manner. As a result, it becomes possible to eliminate a wave-increasing tank or lightning tower, or at the very least reduce the capacity of that tank or tower.

<td></td><td></td><td>The figures</td><td> 15</td><td>to 17. show,</td>

<td>each</td><td>one, one</td><td>another setting using</td><td>an</td><td>perforated plate</td>

<td>for</td><td>suppress</td><td>or prevent the spread</td><td>in</td><td>fluctuations in</td>

excessive pressure from a downward side to an upward side of the pipe. This configuration includes a single rotatable perforated plate 22 that is rotatable about an imaginary line extending through the center of it. As the tubing 23 shown in figure 15 comprises a tubing having a circular cross-section, the rotatable perforated plate has a circular strength as shown in figure 16. Needless to say, the shape of the rotary perforated plate is not limited to this circular shape, but can be selected from various shapes to suit the cross-sectional shape of a used pipe. For example, a rotatable perforated plate 24, having a square shape as shown in figure 17 can be used for a pipe having a cross-sectional shape. The rotary perforated plate does not necessarily have to be in the same shape as a cross-section perpendicular to the central axis of the pipe. It is possible to employ the same shape as a cross-section in a forward or backward sloping line of a perpendicular piano

4Ι / 44 to the central axis of the pipe. The portion of the tubing 23 accommodating the rotatable perforated plate 22 may have a larger diameter for the total open area of ​​the perforations 10 to be enlarged. As in the case of the standardization devices 6 and 16, each of the perforations 10 can be in elliptical, polygonal shape, which means to include a square shape and a rectangular shape or a similar shape without limitation to a circular shape.

Thus, the perforated rotary plate 22 or 24 has a rotary axis 25 extending through the center of the rotary perforated plate 22 or 24 and laterally projected through the tubing. The rotating shaft 25 is connected to an unrevealed rotating conductor located outside the pipeline 23. Examples of these rotating conductors include an electric motor, a hydraulic cylinder and the like. Since the rotating conductor rotates the axis of rotation 25, the rotary perforated plate 22 or 24 between a position in which the rotary perforated plate 22 or 24 almost fits into the flow path of the pipe (that is, a fully closed position in which the rotary perforated plate 22 or 24, if formed without any perforation, would completely close the pipeline flow passage as described by the solid line in figure 15) and a position where the plane of the rotary perforated plate 22 or 24 extends along the central axis of the pipe (i.e., a fully open position described dashed double line in figure 15). The rotary perforated plate 22 or 24 can be configured so that it can stop at a

42/44 fully open position, fully closed position and any angular position between these two positions.

While the configurations shown in figures 15 to 17, each has a rotatable perforated plate 22 or 24 configured to rotate about a horizontal axis, there is no limitation to this configuration. For example, the rotary perforated plate can be configured to rotate around a vertical axis or any desired axis of rotation between the horizontal axis and the vertical axis. A rotated position detection device for detecting an interrupted position where the rotary perforated plate 22 or 24 has stopped can be presented to verify that the rotary perforated plate 22 or 24 rests in an appropriate position.

During normal operation of the aforementioned combustion system, the rotary perforated plate 22 or 24 assumes the fully open position so that a high resistance to the flow of combustible gas does not work. However, when excessive pressure fluctuations are to propagate towards the upside in response to the closure of the emergency shutoff valve located downstream of the pipeline 23 as described above, the rotary perforated plate 22 or 24 rotates rapidly to assume the fully closed position. . Thus, the passage of fluid flow is finally restricted only to the perforations 10 the perforated rotating plate 22 or 24, with the result that the flow resistance in the pipe 23 increases rapidly to cushion the

43/44 pressure fluctuations, thus suppressing the spread of pressure fluctuations.

In addition to the proposed perforated rotary plates 22 and 24 described above, each of the rotary perforated plates 22 and 24 can be used as a mixed fluid uniformity device.

While each of the configurations uses a gas turbine as an example of the combustion system, the present invention is not limited particularly to the use of a gas turbine. For example, the combustion system can be a thermal boiler or an internal combustion engine such as a diesel engine or a gas engine. In summary, the uniformization device according to the present invention can be applied to any fuel system that is capable of maintaining combustion while the calorie taken is within a fixed variation of the calorie fluctuation.

Industrial Applicability

The mixed fluid uniformization device according to the present invention is capable of improving the mixing uniformity of a mixed fluid being provided in a manner unrelated to the fact that the conventional mixer is presented. While a gas is used as an example of a fluid to be subjected to the uniform device, there is no limitation to the gases. The standardization device is also applicable to a liquid supply system. Alternatively, the standardization device can be applied to a

44/44 supply system for the supply of powder, paste or the like.

cement

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