Nova Patents
USRE36033E

Process for the comminution of materials and plants for carrying out the process

Claim Score by NHIP

Read claim 1, the broadest

Abstract

A process for the comminution, in particular defibrillation, and reaction of fibrous materials having a high dry solids content with the addition of a circulating medium, preferably a carrier gas and/or reaction agent, as well as optionally of chemicals. The invention is mainly characterized in that the circulating medium is recycled after leaving the comminuting device, by changing its temperature, and is then recycled to the comminuting device. Another embodiment of the invention is characterized in that the fibrous materials and liquid reaction agent are separated from the carrier gas and reaction agent vapors, which are then recycled back to comminuting device. A plant for carrying out this process is mainly characterized in that the comminuting device and route for recycling and treatment of the circulating medium form a closed system.

Term

Term ended

Expired 11 January 2016, 10.7 years ago.

  1. Priority
  2. Filed
  3. Granted
  4. Expired
  5. Today

11 claims: 3 independent, 8 dependent

  1. 1.
    1. A process for treating high consistency fibrous materials, which comprises PA1 contacting fibrous material, a reaction agent and a carrier gas in a comminuting zone under a closed system to separate said fibrous material into smaller segments and react with said reaction agent;PA1 passing said segmented fibrous material, reaction agent and carrier gas to a reaction zone for further reaction between said segmented fibrous material and said reaction agent;PA1 separating said reaction agent in a liquid phase from said carrier gas to produce a remaining gaseous fraction including vapors of said reaction agent;PA1 separating said gaseous fraction of said reaction agent and said carrier gas from said reaction zone and recycling said gaseous fraction to said comminuting zone for further reaction;PA1 and discharging reacted, segmented fibrous material from said reaction zone.
  2. 8.
    8. A process for treating high consistency fibrous materials, which comprises PA1 contacting fibrous material, a reaction agent and a carrier gas in a comminuting zone under a closed system to separate said fibrous material into smaller segments and react with said reaction agent;PA1 passing said segmented fibrous material, reaction agent and carrier gas to a reaction zone for further reaction between said segmented fibrous material and said reaction agent;PA1 separating a gaseous fraction of said reaction agent and said carrier gas from said reaction zone and recycling said gaseous fraction to said comminuting zone for further reaction;and PA1 discharging reacted, segmented fibrous material from said reaction zone;PA1 wherein said reaction agent is NO.sub.x, with x being an integer between 1 and 3, inclusive, and said carrier gas is carbon dioxide.
  3. 9.
    9. A process for treating high consistency fibrous materials, the process comprising PA1 contacting fibrous material, a reaction agent and a carrier gas in a comminuting zone under a closed system to separate said fibrous material into smaller segments and react with said reaction agent;PA1 passing said segmented fibrous material, reaction agent and carrier gas to a reaction zone for further reaction between said segmented fibrous material and said reaction agent;PA1 separating a gaseous fraction of said reaction agent and said carrier gas from said reaction zone and recycling said gaseous fraction to said comminuting zone for further reaction;PA1 discharging reacted, segmented fibrous material from said reaction zone;and PA1 cooling said gaseous fraction in a heat exchange zone before recycling said gaseous fraction;PA1 wherein said reaction agent is separated in the liquid phase from said carrier gas to produce said gaseous fraction including vapors of said reaction agent.
Independent claims3