BR9307672A - Aparelho e processo de alvejamento de pasta aperfeiçoados - Google Patents
Aparelho e processo de alvejamento de pasta aperfeiçoadosInfo
- Publication number
- BR9307672A BR9307672A BR9307672-0A BR9307672A BR9307672A BR 9307672 A BR9307672 A BR 9307672A BR 9307672 A BR9307672 A BR 9307672A BR 9307672 A BR9307672 A BR 9307672A
- Authority
- BR
- Brazil
- Prior art keywords
- chamber
- mat
- paste
- chemical
- bleaching process
- Prior art date
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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
- D21C9/06—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in filters ; Washing of concentrated pulp, e.g. pulp mats, on filtering surfaces
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
- D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
Patente de Invenção:<B>"APARELHO E PROCESSO DE ALVEJAMENTO DE PASTA APERFEIçOADOS"<D>. Um processo e aparelho de alvejamento para produzir esteiras de pasta de alta consistência com distribuição de produto químico e de temperatura relativamentao uniforme na esteira de pasta empregam uma prensa de lavagem (100) na qual a esteira é formada em uma primeira câmara (I), enquanto uma solução química, que pode ser primeiro aquecida ou resfriada, é adicionada a uma segunda câmara (II). A extração da solução começa na primeira câmara (I) e continua através da segunda câmara (II) até o passe dos cilindros (62). A lavagem por deslocamento da solução da esteira de pasta começa na junção das primeira e segunda câmaras e continua até que a esteira de pasta entre no passe. Por este processo, o ajuste de temperatura e do teor de produto químico é efetuado de modo uniforme com uma mínima perda de energia e materiais.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US99332392A | 1992-12-18 | 1992-12-18 | |
PCT/US1993/012125 WO1994015016A1 (en) | 1992-12-18 | 1993-12-10 | Improved pulp bleaching apparatus and method |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9307672A true BR9307672A (pt) | 1999-09-08 |
Family
ID=25539384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9307672-0A BR9307672A (pt) | 1992-12-18 | 1993-12-10 | Aparelho e processo de alvejamento de pasta aperfeiçoados |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0674729A4 (pt) |
JP (1) | JPH08504899A (pt) |
BR (1) | BR9307672A (pt) |
CA (1) | CA2151812A1 (pt) |
FI (1) | FI952999A0 (pt) |
NO (1) | NO952335D0 (pt) |
WO (1) | WO1994015016A1 (pt) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE0802028A2 (sv) * | 2008-09-24 | 2010-07-20 | Metso Paper Inc | Apparat för tvättning och/eller avvattning av massa |
US8828189B2 (en) | 2012-01-30 | 2014-09-09 | Andritz Inc. | Washer press with multiple nips and multiple displacement wash zones |
CN105178085A (zh) * | 2015-09-21 | 2015-12-23 | 潍坊恒联浆纸有限公司 | 一种杨木浆黑液绿色提取工艺 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE318182B (pt) * | 1968-04-23 | 1969-12-01 | Karlstad Mekaniska Ab | |
US3772144A (en) * | 1971-04-14 | 1973-11-13 | Improved Machinery Inc | Apparatus and method for thickening and washing suspensions containing fibrous material |
US4310384A (en) * | 1979-01-11 | 1982-01-12 | Weyerhaeuser Company | Reducing chemical transfer between treatment stages |
US4269656A (en) * | 1980-04-02 | 1981-05-26 | Ingersoll-Rand Company | Wood pulp forming system and method of recovering spent chemicals |
JPS60121262A (ja) * | 1983-12-02 | 1985-06-28 | Sumitomo Electric Ind Ltd | 連続溶融めつき方法 |
-
1993
- 1993-12-10 CA CA 2151812 patent/CA2151812A1/en not_active Abandoned
- 1993-12-10 BR BR9307672-0A patent/BR9307672A/pt not_active Application Discontinuation
- 1993-12-10 EP EP94904438A patent/EP0674729A4/en not_active Withdrawn
- 1993-12-10 JP JP6515246A patent/JPH08504899A/ja active Pending
- 1993-12-10 WO PCT/US1993/012125 patent/WO1994015016A1/en not_active Application Discontinuation
-
1995
- 1995-06-13 NO NO952335A patent/NO952335D0/no unknown
- 1995-06-16 FI FI952999A patent/FI952999A0/fi unknown
Also Published As
Publication number | Publication date |
---|---|
EP0674729A4 (en) | 1997-06-18 |
FI952999A (fi) | 1995-06-16 |
JPH08504899A (ja) | 1996-05-28 |
NO952335L (no) | 1995-06-13 |
FI952999A0 (fi) | 1995-06-16 |
NO952335D0 (no) | 1995-06-13 |
WO1994015016A1 (en) | 1994-07-07 |
CA2151812A1 (en) | 1994-07-07 |
EP0674729A1 (en) | 1995-10-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PC | Transfer |
Free format text: BELOIT TECHNOLOGIES, INC (US) |
|
EG | Technical examination (opinion): publication of technical examination (opinion) | ||
FC | Decision: refusal |