Disk filter.

Application filed October 27,1902, Serial ϊΓο. 128,938, CfTomodei.j

To all whom it may concern:

Be it known that I, Emmanuel Simoneton, constructing engineer, of 41 Rue d’ Alsace, city of Paris, Republic of France, have invented 5 new and useful Improvements in and Connected with Disk Filters, which improvements are fully set forth in the following specification.

This invention relates to improvements in io disk filters. These filters are generally constructed in the following manner: In a cylindrical casing into which the liquid to be filtered is introduced under pressure or without pressure a pile of disks made of some 15 textile or other suffirble filtering' material is arrangecTvertically. The disks are strung on a hollow shaft formed by two perforated tubes fitted one into the other, the one having an upper and the other a lower platform between 20 which the disks are pressed. The tightening is generally effectelTby acting simultaneously from above and below on a screw running through the two platforms. The lower tube has a cock which discharges into a double 25 bottom of the vessel in which the filtered liquid collects. The wine or other liquid to be filtered enters the vessel, passes through the pile of filtering-disks, by which it is filtered, then into the bipartite central collector al30 ready mentioned, through holes formed therein, and runs off in a filtered condition through the lower part. The disadvantages of such arrangement are as follows: The mounting of the disks on the bipartite collector is a deli35 cate operation. When the tipper tube is placed in the center of the formed pile, the inner rims of the disks may be torn. After being setup, the device is often insufficiently rigid. The india-rubber joints placed un40 der the lower plate are therefore defective. \ Finally and especially, the removal of the pile tvhen this is requisite from any cause—such as damage, necessity of washing, &c.—cannot be effected except by loosening the screw 45 which tightens the upper plate and taking down piece by piece the pile, which is without supportas soon as the screwis loosened. This latter difficulty has certainly hitherto prevented this kind of filter from being used as 50 constantly as might be desired, and the attainment of the important result referred to in the course of this specification—viz. ,thefacil ity of arranging several filtering elements in a single vessel.

The present invention is intended to obvi- 55 ate these disadvantages by the employment of a single collecting - tube supporting the whole arrangement, forming part with the lower plate and supporting an external metallic joint and an internal metallic joint 60 formed immediately over the double bottom of the filter-casing, to which they are made tight by a nut engaging with a screw-threaded part at the end of the collector referred to. Thus by simply removing this nut the whole 65 pile may be removed without being loosened. The pile may likewise be put in place instantly. This device is illustrated in the accompanying drawings.

Figure 1 is a vertical section through the 70 axis of the device applied to a filter with a single element. Figs. 2 and 3 are respectively a vertical section and inverted plan illustrating the method of mounting several filtering elements together in a single vessel. 75 Fig. 4 is a vertical section illustrating another form of the method of mounting several filtering elements together in a single filter. Fig. 5 represents one of the elements illustrated in Figs. 2 or 4 as removed or ready for being So put in place. Finally, Figs. 6 and 7 are respectively a section through 11 in Fig. 4 and a plan illustrating the arrangement of the double bottom of the filter according to the form shown in Fig. 4. 85

As will be seen in Fig. 1, the hollow core or collector 1, on which the filtering-disks 2 are strung, is formed by a perforateWTube having connected thereto a platform 3, on which the pile rests. The disks are thus 90 . tightened simply by means of a (screw 4 engaging in a nut 5, placed in the upper part of the tube, to which it is firmly attached. This tightening operation may consequently be effected before mounting the filter-body 90 in the cylinder by bringing the two plates together without the bottom of the filter being used in anyway as a support.

The faced edges of the head 6 of the screw 4 lodge against a faced seating 7, forming a 100 metallic joint. This seating terminates in a cap 8 in -which the screw engages and which forms part with the upper platform or plate.......—

9, causing it to descend and compress the a

730,485 disk when the screw is turned with a key or hand-wheel mounted on the square screw extension 10.

In. the bottom 11 of the filter is a chamber 5 12, which is either cast therewith. or formed therein by some means, and constitutes in some degree a double bottom, with which the stem 13, forming an extension of the collector or core, engages. This socket communicates o through openings 14 14', &c., with the chamber 12 and terminates in a solid piece 15, which is screw-threaded externally.

In order that the liquid to be filtered and entering the chamber 12 through the stem 13 15 may be thoroughly isolated, two joints are necessary, the one in the upper part of the ..chamber, separating it from the unfiltered liquid in the filter, the other in the lower part, separating it from the outer air. In the pres20 ent arrangement these two joints have the peculiarity of being metallic and both beingmade tight by the same organ which renders the collector, and consequently the filtering material, immovable. For this purpose the 2 j edges 16 and 17 of the upper and lower opening of the chamber 12 are made conical, each of the conical surfaces being symmetrically arranged in relation to the horizontal plane of the chamber. These edges are carefully 30 faced.

Q.n the upper edge 16 a counter-truncated piece 18 rests, which is likewise faced and formed on the under surface of the platform 3. Against the lower edge 17 a faced trun35 cated counterpart 19 rests, which is formed on the periphery of a screw-nut 20, engaging with the screw-thread of the stem 13. It will be easily understood that the tightening of . this nut at the same time that it renders the 40 collector and the platform 3, which is firmly attached thereto, immovable on the bottom of the vessel also tightens the joints and makes them impermeable.

The filtered liquid escapes through a junc45 tion or cock 21, mounted in the side of the chamber 12. The effect of this is as follows: The stem 13 not carrying the discharge cock or pipe, this being on the chamber 12, the simple loosening of the nut 20 and its removal 50 are sufficient for enabling the completelymounted filtering material to be taken out of the top of the filter at one operation without interfering with the pipes.

The combination of devices above described 55 renders it easy to set up several filtering elements in the same filter. This combination is illustrated in Figs. 2 and 3, as seen by the figures, the chambers 12, &c., corresponding to each element being put together or cast 60 together on the ordinary bottom 22 of the filter; but over each discharge-opening 21 a pipe 23 is screwed, which opens into the casing of a central cock 25, through which the filtered liquid escapes. A cock 26, mounted 65 on the opening 21 of each element, enables any particular filtering element to be isolated as may be desired, if in looking through the glass eye-hole this element is seen to be filtering badly. Should this element need repairing, the loosening of the corresponding nut 70 will enable it to be instantly removed and replaced by another duly prepared element. Consequently the action of the filter is not stopped. When no importance is attached to the isolating of each element, the combina- 75 tion of several filtering elements in a single filter may be effected in a similar manner, only a single chamber 12, constituting, in fact, a double bottom, being provided for all these elements. This form of the invention 80 is shown in Figs. 4, 6, and 7. In this form the bottom of the filter, besides the ordinary discharge cock 25, is furnished with two cocks which communicate one through the opening27 with the interior of the chamber 12, the 85 other through the opening 28 with the interior 29 of the filter. These two cocks are opened when the washing and cleaning out of the apparatus are effected. When the apparatus is washed, the water flows in an inverse course 90 to that which is taken during the filtering of the liquid. It enters under pressure through 27, rises in the perforated collectors 1, passes through the filtering disks, pours into the filter, and runs out through 28. Whatever the 9, arrangement may be, Figs. 1, 2. or 4, the working is the same and is easily understood.

The liquid to be filtered, contained in a tank which discharges into the filter, enters through the cock 30,which is gradually opened in order 1 0 to avoid any rushingin of the liquid, fills the cylinder 31, the air in which escapes through the air-cock 32. The filter being filled, the liquid having no other outlet passes through the filtering-body 33 33', &c., formed by the 105 disks, depositing on the outside the matters in suspension contained in it. After getting rid of these matters the filtered liquid passes into the perforated collectors 29, <fcc., and through the perforated extension casings or no pipes 13 13', &c., into the chamber 12, Figs. 4 and 6, from which it is discharged through the cock 25.

The advantages of the filter with several elements are as follows: Filtration entirely out 115 of reach of the air, owing to the employment of metallic joints easily tightened by the nuts 20. Any mixing of the filtered and the unfiltered liquid is rendered impossible by these same joints, which entirely separate the in- 120 terior of the collectors and of the chamber containing the filtered liquid from the interior of the vessel containing the liquid to be filtered ; recovery of all the liquid contained in the filter without the necessity of drawing it 125 off, owing to the arrangement of the double bottom with emptying-cock; proper washing of the filtering elements in a f ew minutes without removing them from the filter, also due to the double bottom with the openings for 130 washing and emptying; easy placing and removal of the filtering elements, owing to the method of fixing by the nut 20. Finally and chiefly, by means of this combination of sev730,483 feral elements in one vessel large quantities of liquid are filtered in a small space. - A cylinder containing four elements one meter in height by forty centimeters in diameter will 5 filter fifteen hundred hectoliters of beet-root juice at 105° and six hundred hectoliters of syrup at 22° Baume in a day of twenty-four hours.