CN104746370B - The preparation technology of mulberry shoot bleached chemi-mechanical pulp - Google Patents
The preparation technology of mulberry shoot bleached chemi-mechanical pulp Download PDFInfo
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- CN104746370B CN104746370B CN201510097445.0A CN201510097445A CN104746370B CN 104746370 B CN104746370 B CN 104746370B CN 201510097445 A CN201510097445 A CN 201510097445A CN 104746370 B CN104746370 B CN 104746370B
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- thread rolling
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- mulberry shoot
- rolling machine
- mechanical pulp
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/14—Disintegrating in mills
- D21B1/16—Disintegrating in mills in the presence of chemical agents
Abstract
The present invention discloses the preparation technology of a kind of mulberry shoot bleached chemi-mechanical pulp, and step is as follows: (1) mulberry shoot is cut into the section material of 35 50mm, washing impurity-removing, and dehydration after remove impurity, gas steam；(2) first paragraph thread rolling machine sent into by the material that step (1) obtains, and stands 40min, be washed out after thread rolling, wherein, in first paragraph thread rolling machine based on over dry weight of material, adds 4%NaOH, 2.5%H2O2And 0.1%EDTA；(3) second segment thread rolling machine sent into by the material that step (2) obtains, and stands 40min, be washed out after thread rolling, wherein, in second segment thread rolling machine based on over dry weight of material, adds 3%NaOH, 5%H2O2, 0.3% polyacrylamide (PAM) and 1%MgSO4；(4) material that step (3) obtains carries out high consistency refining, latenter through disappearing, and i.e. obtains mulberry shoot bleached chemi-mechanical pulp.Compared with conventional chemical methods, the present invention can obtain higher pulp yield and whiteness.
Description
Technical field
The invention belongs to field of papermaking, be specifically related to the preparation technology of mulberry shoot bleached chemi-mechanical pulp.
Background technology
Mulberry belongs to perennial phreatophyte, strong to soil and climatic adaptation, has the features such as growth is fast.At present having done some researchs for white mulberry strips slurrying, pulping process mainly uses chemical method (sulphite process), but chemical method exists pollutional load is big, yield is low problem.
Summary of the invention
It is an object of the invention to overcome problem present in existing mulberry shoot slurrying, it is provided that the preparation technology of a kind of mulberry shoot bleached chemi-mechanical pulp.
The technical scheme that the present invention is used for achieving the above object is as follows:
The preparation technology of mulberry shoot bleached chemi-mechanical pulp, step is as follows:
(1) mulberry shoot is cut into the section material of 35-50mm, washing impurity-removing, and dehydration after remove impurity, gas steam；
(2) first paragraph thread rolling machine sent into by the material that step (1) obtains, and stands 40-50min, be washed out after thread rolling, wherein, in first paragraph thread rolling machine based on over dry weight of material, adds 3-5% NaOH, 2-3% H2O2With 0.05-0.15% EDTA；
(3) second segment thread rolling machine sent into by the material that step (2) obtains, and stands 40-50min, be washed out after thread rolling, wherein, in second segment thread rolling machine based on over dry weight of material, adds 2-4% NaOH, 4-6% H2O2, 0.2-0.4% polyacrylamide (PAM) and 0.5-1.5% MgSO4；
(4) material that step (3) obtains carries out high consistency refining, latenter through disappearing, and obtains mulberry shoot bleached chemi-mechanical pulp.
Further, step (1) gas steaming condition is: normal pressure, temperature 90-95 DEG C, time 30-50min.
Further, during step (4) described high consistency refining, slurry concentration is 25-30wt%.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further details.
Embodiment 1
(1) mulberry shoot being cut into the equal refining section of 35-50mm, qualified section material is sent into washing in twin drum material washing machine and removes impurity, then carry out gas steaming (normal pressure, temperature 90-95 DEG C) in gas steaming storehouse sent into by spiral dewaterer, gas steams time 30min.
(2) first paragraph twin screw thread rolling machine sent into by the material that step (1) obtains, and in the thread rolling machine of this section based on the weight of over dry material, adds 4% NaOH, 2.5% H2O2With 0.1% EDTA；Material after thread rolling is delivered to reaction warehouse and is stood 40min, is re-fed in press master washing after reacted standing.
(3) second segment twin screw thread rolling machine sent into by the material that step (2) obtains, and in the thread rolling machine of this section based on over dry weight of material, adds 3% NaOH, 5% H2O2, 0.3% PAM and 1% MgSO4；Material after thread rolling is sent into reaction warehouse and is stood 40min, carries out inverse formula through two sections of press masters and wash after reacted standing.
(4) material that step (3) obtains is sent into high-density paste mill and is carried out high consistency refining (slurry concentration 25-30wt%), unscreened stock after mill is sent into and is carried out latent (slurry concentration 4-5wt% that disappears in hydrabrusher, time 10-15min), i.e. obtain mulberry shoot bleached chemi-mechanical pulp.
Embodiment 2
(1) mulberry shoot being cut into the equal refining section of 35-50mm, qualified section material is sent into washing in twin drum material washing machine and removes impurity, then carry out gas steaming (normal pressure, temperature 90-95 DEG C) in gas steaming storehouse sent into by spiral dewaterer, gas steams time 50min.
(2) first paragraph twin screw thread rolling machine sent into by the material that step (1) obtains, and in the thread rolling machine of this section based on the weight of over dry material, adds 3.5% NaOH, 2% H2O2With 0.15% EDTA；Material after thread rolling is delivered to reaction warehouse and is stood 40min, is re-fed in press master washing after reacted standing.
(3) second segment twin screw thread rolling machine sent into by the material that step (2) obtains, and in the thread rolling machine of this section based on over dry weight of material, adds 3.5% NaOH, 6% H2O2, 0.4% PAM and 1% MgSO4；Material after thread rolling is sent into reaction warehouse and is stood 50min, carries out inverse formula through two sections of press masters and wash after reacted standing.
(4) material that step (3) obtains is sent into high-density paste mill and is carried out high consistency refining (slurry concentration 25-30wt%), unscreened stock after mill is sent into carry out in hydrabrusher disappearing and latent (is starched concentration 4-5wt% when disappearing latent, time 10-15min), i.e. obtain mulberry shoot bleached chemi-mechanical pulp.
Unless otherwise indicated, device therefor of the present invention is conventional equipment.
Using the yield of the inventive method mulberry shoot bleached chemi-mechanical pulp up to 75-80%, whiteness can reach 78-82 degree, and copy paper bulk is good.
Additionally, industrial chemicals consumption of the present invention is less, lignin dissolution is few, and water wasting processes simpler than traditional handicraft, and expense is little.
Claims (3)
1. the preparation technology of mulberry shoot bleached chemi-mechanical pulp, step is as follows:
(1) mulberry shoot is cut into the section material of 35-50mm, washing impurity-removing, and dehydration after remove impurity, gas steam；
(2) first paragraph thread rolling machine sent into by the material that step (1) obtains, and stands 40-50min, be washed out after thread rolling, wherein, in first paragraph thread rolling machine based on over dry weight of material, adds 3-5% NaOH, 2-3% H2O2With 0.05-0.15% EDTA；
(3) second segment thread rolling machine sent into by the material that step (2) obtains, and stands 40-50min, be washed out after thread rolling, wherein, in second segment thread rolling machine based on over dry weight of material, adds 2-4% NaOH, 4-6% H2O2, 0.2-0.4% polyacrylamide and 0.5-1.5% MgSO4；
(4) material that step (3) obtains carries out high consistency refining, latenter through disappearing, and i.e. obtains mulberry shoot bleached chemi-mechanical pulp.
The preparation technology of mulberry shoot bleached chemi-mechanical pulp the most according to claim 1, it is characterised in that the gas of step (1) steams condition and is: normal pressure, temperature 90-95 DEG C, time 30-50min.
The most according to claim 1, the preparation technology of mulberry shoot bleached chemi-mechanical pulp, it is characterised in that during step (4) described high consistency refining, slurry concentration is 25-30wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510097445.0A CN104746370B (en) | 2015-03-05 | 2015-03-05 | The preparation technology of mulberry shoot bleached chemi-mechanical pulp |
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| CN201510097445.0A CN104746370B (en) | 2015-03-05 | 2015-03-05 | The preparation technology of mulberry shoot bleached chemi-mechanical pulp |
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| CN104746370A CN104746370A (en) | 2015-07-01 |
| CN104746370B true CN104746370B (en) | 2016-10-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105256625A (en) * | 2015-09-18 | 2016-01-20 | 新疆国力源投资有限公司 | Method for preparing bleached bamboo pulp |
| CN105200838A (en) * | 2015-09-18 | 2015-12-30 | 新疆国力源投资有限公司 | Method of preparing bamboo willow bleaching pulp |
| CN108999007B (en) * | 2018-08-02 | 2020-08-28 | 南京高新工大生物技术研究院有限公司 | Component-deficient plant long fiber and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100344829C (en) * | 2003-12-26 | 2007-10-24 | 华泰集团有限公司 | Technology for preparing alkali hydrogen peroxide chemical machinery pulping |
| CN101205690A (en) * | 2006-12-21 | 2008-06-25 | 廉书平 | Sea-buckthorn pulping method and sea-buckthorn pulp thereof |
| US8734611B2 (en) * | 2008-03-12 | 2014-05-27 | Andritz Inc. | Medium consistency refining method of pulp and system |
| CN101613976B (en) * | 2009-07-17 | 2010-12-08 | 中国林业科学研究院林产化学工业研究所 | Method for preparing bleached chemi-mechanical pulp by using whole straw of mulberry tree branch |
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Effective date of registration: 20161021 Address after: 830000, No. 2, building 6, Nanshan New District office building, the Xinjiang Uygur Autonomous Region, Shihezi Patentee after: Xinjiang Guoliyuan Investment Co., Ltd. Address before: 830000, the Xinjiang Uygur Autonomous Region, Urumqi hi tech Development Zone, 21, Yu Xin District, Guilin Road, 3, 4, 2, 402 Patentee before: Xinjiang Power Eco Japan Co., Ltd. of state |
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Inventor after: Teng Tiesheng Inventor after: Zhang Yueping Inventor before: Teng Tiesheng Inventor before: Zhang Yueping |
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Effective date of registration: 20190517 Address after: No. 19 Maqiao District, Shihutan Town, Shihezi City, Xinjiang Uygur Autonomous Region, 832000 Patentee after: Shihezi Guoliyuan Environmental Protection Pulping Co., Ltd. Address before: 830000 No. 6, 2nd floor, Nanshan New District Office Building, Shihezi City, Xinjiang Uygur Autonomous Region Patentee before: Xinjiang Guoliyuan Investment Co., Ltd. |