GB916867A - Apparatus and a method for continuously digesting raw cellulosic material - Google Patents
Apparatus and a method for continuously digesting raw cellulosic materialInfo
- Publication number
- GB916867A GB916867A GB1572459A GB1572459A GB916867A GB 916867 A GB916867 A GB 916867A GB 1572459 A GB1572459 A GB 1572459A GB 1572459 A GB1572459 A GB 1572459A GB 916867 A GB916867 A GB 916867A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chips
- screw
- submerged
- cellulosic material
- defibring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/10—Physical methods for facilitating impregnation
Landscapes
- Paper (AREA)
Abstract
<PICT:0916867/IV(a)/1> Apparatus for continuously digesting &c. cellulosic material, e.g. chips, comprises a chamber 11 with an inlet 21 submerged in the digestion liquor, e.g. a caustic solution, and an outlet 22, a screw-feeder 10 (transverse to the plane of the drawing), with a perforated casing, compressing the chips &c. to eliminate voids and express air and liquids so that on entering the chamber 11 they expand whilst submerged and are received by a screw-conveyer 25 which takes them over a strainer 26 and discharges them at 22 to an assembly 12 which may be identical with the feeder 10 and from which they fall through a spout 49 to a conveyer 50 which feeds them to defibring machines 13 which deliver them as pulp to a stock chest 15 from which the pulp is pumped at 16 to refiners &c. Digestion liquor from the tank 17 is circulated through pipe-lines as illustrated, the lines 41 being for spraying the chips before they are compressed. The chips may be processed at room temperature, e.g. for 20 mins. submerged time, and 5 mins. drainage time. The compression by the screw-assemblies 10, 12 effects substantial defibring.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US73556958A | 1958-05-07 | 1958-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB916867A true GB916867A (en) | 1963-01-30 |
Family
ID=24956323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1572459A Expired GB916867A (en) | 1958-05-07 | 1959-05-07 | Apparatus and a method for continuously digesting raw cellulosic material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB916867A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2336344A1 (en) * | 2009-12-21 | 2011-06-22 | Sekab E-Technology AB | Pre-treatment of cellulosic material |
-
1959
- 1959-05-07 GB GB1572459A patent/GB916867A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2336344A1 (en) * | 2009-12-21 | 2011-06-22 | Sekab E-Technology AB | Pre-treatment of cellulosic material |
| WO2011080131A3 (en) * | 2009-12-21 | 2011-09-29 | Sekab E-Technology Ab | Pre-treatment of cellulosic material |
| US8834633B2 (en) | 2009-12-21 | 2014-09-16 | Sekab E-Technology Ab | Pre-treatment of cellulosic material |
| US9528129B2 (en) | 2009-12-21 | 2016-12-27 | Sekab E-Technology Ab | Pre-treatment of cellulosic material |
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