Title:
【発明の名称】クラフトパルプの製造方法
Document Type and Number:
Japanese Patent JP2971947
Kind Code:
B2
Abstract:
A single vessel digester system for digesting cellulosic fibrous material comprises a substantially upright vessel (221) having a top (220) and bottom (222) with a slurry of comminuted cellulosic material to be digested introduced adjacent the top (220), and pulp withdrawn adjacent the bottom (222); the vessel having a continuous cooking zone disposed at a first level of said digester (221), and including a first screen (225) for removing liquor from the cooking zone and a cooking circulation loop (230, 235, 238, 239) associated with said first screen (225) for circulating removed liquor to the interior of said digester (221) near the vicinity of said first screen (225); and an extraction screen (245) with extraction conduit (246) located at a second vertical level in said vessel (221), below said first level, and having means for adding dilution liquid (241; 242), having a lower dissolved organic material concentration than the liquor removed in said cooking circulation loop (230, 235, 238, 239), to said cooking circulation loop (230, 235, 238, 239), to reduce the concentration of DOM in the digester and thereby increase the strength of the pulp so-produced.
Inventors:
MAAKOTSUCHIA BURUUNO ESU
PURO JEI ROBAATO
RAKUSO RICHAADO O
FUIRITSUPUSU JOSEFU AARU
RIHAMU RORUFU SHII
RICHAADOSEN JAN TEII
CHATSUSE AARU FURETSUDO
PURO JEI ROBAATO
RAKUSO RICHAADO O
FUIRITSUPUSU JOSEFU AARU
RIHAMU RORUFU SHII
RICHAADOSEN JAN TEII
CHATSUSE AARU FURETSUDO
Application Number:
JP52423694A
Publication Date:
November 08, 1999
Filing Date:
February 25, 1994
Export Citation:
Assignee:
AARUSUTOROOMU MASHIINARII INC
International Classes:
C08B1/00; C08B15/00; D21C3/02; D21C3/22; D21C3/24; D21C7/00; D21C7/12; D21C7/14; D21C9/02; D21C11/00; D21C11/02; D21C11/04; D21G7/00; (IPC1-7): D21C3/22; D21C3/02; D21C7/00; D21C11/02
Domestic Patent References:
| JP4300378A | ||||
| JP415312B2 |
Attorney, Agent or Firm:
Nakamura Shizuo