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Class Information
Number: 162/250
Name: Paper making and fiber liberation > Apparatus > Digester > Heating means
Description: Apparatus provided with means to cause a rise in temperature of either the stock material or the chemical treating fluid.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7547374 |
Method for impregnating chips in a continuous digestion system |
Jun. 16, 2009 |
| 7402224 |
Method for producing paper pulp, lignins, sugars and acetic acid by frantionation of lignocellulosic vegetable material in formic/acetic acid medium |
Jul. 22, 2008 |
| 7381302 |
Method and arrangement for impregnating chips |
Jun. 3, 2008 |
| 6497791 |
Apparatus for pre-treatment of wood chips |
Dec. 24, 2002 |
| 6494994 |
Pulp heating apparatus |
Dec. 17, 2002 |
| 6379504 |
Apparatus for pulping sawdust |
Apr. 30, 2002 |
| 6306252 |
Heat recovery from spent digester cooking liquor |
Oct. 23, 2001 |
| 6176971 |
Heat economy enhancements for the recovery and use of energy obtained from spent cooking liquors |
Jan. 23, 2001 |
| 5547546 |
Chip bin with steaming control and a gas vent containing a vacuum and pressure relief device |
Aug. 20, 1996 |
| 5500083 |
Method of feeding cellulosic material to a digester using a chip bin with one dimensional convergence and side relief |
Mar. 19, 1996 |
| 5489363 |
Pulping with low dissolved solids for improved pulp strength |
Feb. 6, 1996 |
| 5479792 |
Heating arrangement |
Jan. 2, 1996 |
| 5256255 |
Displacement heating in continuous digesters |
Oct. 26, 1993 |
| 5114540 |
Apparatus for chemical treatment of lignocellulosic materials |
May. 19, 1992 |
| 5089089 |
System for sulfonating mechanical pulp fibers |
Feb. 18, 1992 |
| 4944840 |
Method and apparatus for evaporating waste liquor produced when cooking fibrous material containing cellulose |
Jul. 31, 1990 |
| 4867845 |
Vertical steaming vessel |
Sep. 19, 1989 |
| 4818295 |
Cyclone reactor |
Apr. 4, 1989 |
| 4764254 |
Falling film liquor heater having a screen to prevent clogging of a liquid distributing tray |
Aug. 16, 1988 |
| 4612088 |
Reactor to perform chemical reactions with a disintegrating disc |
Sep. 16, 1986 |
| 4608121 |
Process for continuous digestion of finely-divided material with heat capacity flows of substantially the same magnitude |
Aug. 26, 1986 |
| 4556452 |
Process and apparatus for producing pulp |
Dec. 3, 1985 |
| 4547264 |
Method of withdrawing liquid from a pair of vertically spaced annular screens |
Oct. 15, 1985 |
| 4259151 |
Pulping apparatus |
Mar. 31, 1981 |
| 4221632 |
Method and apparatus for determining the location of the chip level in a pulping digester |
Sep. 9, 1980 |
| 4193840 |
Laboratory minidigesters and method of using the minidigesters |
Mar. 18, 1980 |
| 4155805 |
Method for continuously digesting cellulosic fiber by evenly spreading the fiber material over the digestion vessel with steam |
May. 22, 1979 |
| 4133714 |
Reaction vessel with pulsating means for producing lignocellulose product from crushed vegetable raw materials |
Jan. 9, 1979 |
| 4124440 |
Chip bin steam distributor with a vibrating discharge |
Nov. 7, 1978 |
| 4062722 |
Device for treating deformable particles with the counterflowing liquids |
Dec. 13, 1977 |
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