CN100560860C - The method of vertically digesting bagasse pulp by anthraquinone sulfate process - Google Patents
The method of vertically digesting bagasse pulp by anthraquinone sulfate process Download PDFInfo
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- CN100560860C CN100560860C CNB2006100109052A CN200610010905A CN100560860C CN 100560860 C CN100560860 C CN 100560860C CN B2006100109052 A CNB2006100109052 A CN B2006100109052A CN 200610010905 A CN200610010905 A CN 200610010905A CN 100560860 C CN100560860 C CN 100560860C
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Abstract
The present invention is a kind of method of vertically digesting bagasse pulp by anthraquinone sulfate process.After the improvement of this method by vertical digester structure, adopt AQ-sulfate process and distinctive digesting technoloy, the digestion process time can relatively be reduced, maximum temperature need not too high bagasse just can pulping, pulp yield height after the boiling, whole technical process adapt to bagasse pulpboard quality requirement fully.The paper pulp that it was produced has good uniformity, the yield height, and less energy consumption, the intensity height, it is fast to take off this plain speed, the pulp strength height, and the slurry that can obtain low card uncle valency provides advantage for the enforcement of ECF or TCF bleaching process.The present invention has not only solved the papermaking enterprise problem that there is lack of raw materials, can also solve the problem that general paper plant adopts rotary spherical digester not increase in scale, for local sugar refinery bagasse has found outlet, sugar industry company can go on the road of " ecological sugar industry " by the adjustment of most optimum distribution of resources and product, the industrial structure.Can be utilization to bagasse, the development of recycling economy is laid a good foundation.
Description
Technical field
The present invention relates to method with vertically digesting bagasse pulp by anthraquinone sulfate process.
Background technology
Bagasse is the byproduct of cane sugar manufacture industry, concentrates by sugar refinery, and be a kind of very desirable paper making raw material.Bagasse belongs to staple fibre, and tearability is lower, the similar hardwood pulp of character, and for most of cardboard kinds, bagasse pulp almost completely can replace hardwood pulp.The bagasse source is abundant, and pulping, bleaching easily become paper surface smoothing exquisiteness, and production cost are lower, can be used for making paper for daily use, cultural printing paper, paper tableware etc. fully easily.
At present, the bagasse in sugar refinery, the fuel that major part all is used as self boiler reclaims heat energy, and have more than is needed bagasse just is discarded into spoil area, and is very unfortunate.
In the manufacturing enterprise of China's bagasse with sulfate pulping, adopt rotary spherical digester or transverse tube to connect mostly and steam, at present, its digesting apparatus is still based on rotary spherical digester.Because the restriction of this body structure of rotary spherical digester, digesting technoloy and desirable boiling electrochemical conditions greatly differ from each other, and cause digestion process efficient low, the energy consumption height, and the chemicals consumption is big, the production cost height, and can not produce the slurry of Extended Delignification; When unloading the blowing material, produce molten solid shape organic matter resorption phenomenon in fibrocyte, spurt or carry slurry to cause the pulp fiber refinement, make black liquid extraction and pulp washing become more difficult.For addressing these problems, people have carried out a lot of trials, such as adopting continuous steaming-boiling technology etc., eventually because of existing problems and continuously cooking system requirements height to fail to obtain expected results.Thirty years of age pot of boiling had precedent at acid system, but used the vertical digester boiling, and can produce soup can not well circulate, and bagasse is to be difficult to cook slurry, and the slurry after the boiling is difficult to blow out.
Summary of the invention
The objective of the invention is to walk the road of good recycling economy, and a kind of method that can make the former pulp yield height of bagasse, vertically digesting bagasse pulp by anthraquinone sulfate process that whiteness is high is provided in order to give full play to the bagasse resource of sugar industry.
Technical solution of the present invention is:
1, digester circulating system transformation:
Vertical digester, because inlet and liquid outlet distance are big, after the charging, it is much bigger that the bagasse layer thickness produces resistance ratios cooking liquor penetrating power, causes the cooking liquor infiltration capacity can not satisfy the requirement of soup circulation, more can not realize pot needs of interior Hot swapping washing.Therefore, must try every possible means, make it satisfy the requirement of bagasse boiling from structure.
The liquid distributor that the vertical digester cocycle is rehashed, it is the bottom (replacing having on the former digester circulation double-edged fine-toothed comb in Φ 6mm aperture) that liquid distribution plate is contained in the outlet of vertical digester upper circular tube, and can adjust, enter pot interior angle and cloth liquid is adjusted by cooking liquor, the finely dispersed eyelet of Φ 20mm is arranged on the liquid distribution plate.And cancellation is the circulation double-edged fine-toothed comb down, and like this, at the soup circulation time, the bagasse at cocycle position just can fully absorb soup, thereby guarantees cooking quality.
2, digesting technoloy:
1) bagasse (over dry) is packed in the upright steamer: beat water (the rare night after usefulness is washed) at the bottom of the part before the dress pot, temperature is about 60～70 ℃, adopting liquid to soak the dress pot (is liquor charging limit, the limit bagasse raw material of packing in digester, after having adorned, raw material sends into cooking liquor by upper circular tube again, treat that the bagasse raw material by after the cooking liquor compacting, replenishes a part of bagasse raw material again, enter cooking procedure, the beginning mashing off), the dress pot led to steam 15～20 minutes in the bottom of a pan simultaneously; The logical steam in bottom, dress pot back is warming up to 70～90 ℃, and softening bagasse treats that pressure begins to start circulating pump to 0.4Mpa, carries out the soup circulation, and over dry bagasse raw material per ton adds 0.5 kilogram anthraquinone auxiliary agent;
2) when the bagasse raw material is filled, add NaOH Na
2OH (alkali) 10～13% (in the bagasse oven dry weight) and vulcanized sodium 10～12% (in the bagasse oven dry weight);
3) ratio of over dry raw material weight (kg) and the total liquid measure volume of boiling (L) is 1: 5～6.5 (to be liquor ratio: 1: 5～6.5 in the digester; In the actual production, total liquid measure comprises the moisture in the raw material and adds the interior whole cooking liquors of digester); In the digestion process, boiling temperature is 164 ± 1 ℃, and (the bagasse bulk delignification starts from 80 ℃～100 ℃ during boiling, but the ordinary circumstance bagasse is at 140 ℃ of pulpings just, for guarantee boiling fully and the quality boiling temperature be controlled at about 164 ℃), cooking pressure: 0.64 ± 0.01MPa, digestion time are 210-240 minute;
4) after the boiling when Kappa number 8～15, steam separate the thing trace, viscosity is 1200～1400dm
3/ kg.
Whiteness by washing, bleaching, screening bagasse pulp after the boiling can reach 42.1%.Only about less than 2%, bleaching process can not cause the waste of bleaching liquor to the screening reject rate of bagasse slurry.
The present invention has following advantage compared with the prior art:
Because having raw tissue, bagasse loosens, surface area is big, absorbs soup easily, and lignin content is low in addition, the characteristic that hemicellulose level is high, and adopt vertical digester and the technology of not transforming, with sulfate pulping, the soup circulation is bad, bagasse is difficult to cook slurry, in order to improve circulation, before boiling, the circulatory system is transformed.Behind the loop transformation, circulatory problems has solved, and it is unobstructed that pot is put in boiling, and surplus slurry phenomenon is seldom arranged, and has reached intended purposes.Adopt single pot of PR rotary spherical digester of vertical digester boiling bagasse ability big, the former pulp brightness height of the bagasse that boiling goes out, adopt the AQ-sulfate process, the digestion process time can relatively reduce, maximum temperature need not too high bagasse just can pulping, pulp yield height after the boiling, whole technical process adapt to bagasse pulpboard quality requirement fully.The paper pulp that it was produced has good uniformity, the yield height, and less energy consumption, the intensity height, it is fast to take off this plain speed, the pulp strength height, and the slurry that can obtain low card uncle valency provides advantage for the enforcement of ECF or TCF bleaching process.Be considered in the sulfate pulping decoction system the most flexibly.All the time protect in the pot and treat certain hydraulic pressure, and keep higher liquor ratio (1: 6～6.5), satisfied the requirement that digestion process is operated under liquid phase, prevented the inhomogeneous problems that may cause of soup.
The economic benefit that the present invention brought: producing with the bagasse is raw material, and annual year is produced 7500 tons of bagasse pulps by the production schedule 50% production bagasse pulp (calculating yearly productive capacity is 1.5～1.7 ten thousand tons), then:
Increase the output value 7500 * 3800=28500000.00 unit (bagasse pulp market price: 3800 yuan/ton); simultaneously the forest of country has been got good protective effect; can cut down 10～12 cubic metres of calculating by 1 mu, 7500 tons of paper pulp need timber to be: 7500 * 4.6=34500 cubic meter.Can reduce disafforestation area 34500 ÷ 12=2875 mus.
The bleaching bagasse pulp that anthraquinone sulfate process vertical digester of the present invention is produced, not only solved the papermaking enterprise problem that there is lack of raw materials, can also solve the problem that general paper plant adopts rotary spherical digester not increase in scale, for local sugar refinery bagasse has found outlet, sugar industry company can go on the road of " ecological sugar industry " by the adjustment of most optimum distribution of resources and product, the industrial structure.Can be utilization to bagasse, the development of recycling economy is laid a good foundation.
The specific embodiment
Embodiment:
1, liquid distribution plate is contained in the bottom (replacing having on the former digester circulation double-edged fine-toothed comb in Φ 6mm aperture) of vertical digester upper circular tube outlet, the finely dispersed eyelet of Φ 20mm is arranged on liquid distribution plate.And cancellation is the circulation double-edged fine-toothed comb down, and like this, at the soup circulation time, the bagasse at cocycle position just can fully absorb soup, thereby guarantees cooking quality.
2, digesting technoloy:
1) (over dry) bagasse is packed into 75m
3In the upright steamer, beat water (the rare black liquor behind the end water use pulp washing) at the bottom of the part before the dress pot, adopting liquid to soak the dress pot (is liquor charging limit, the limit bagasse raw material of packing in digester, after having adorned, raw material sends into cooking liquor by upper circular tube again, treat that the bagasse raw material by after the cooking liquor compacting, replenishes a part of bagasse raw material again, enter cooking procedure, the beginning mashing off), the dress pot led to steam 15～20 minutes in the bottom of a pan simultaneously; The logical steam in bottom, dress pot back is warming up to 70～90 ℃, softening bagasse treats that pressure begins to start circulating pump to 0.4Mpa, carry out the soup circulation, add the anthraquinone auxiliary agent (anthraquinone adopts the decentralized anthraquinone of Changshu, Jiangsu Fine Chemical Works) of (over dry bagasse raw material per ton) 0.5 kilogram, to improve pulp strength;
2) when the bagasse raw material is filled, add NaOH Na
2HO (alkali) 10～13% (in over dry bagasse weight) and vulcanized sodium 10～12% (in over dry bagasse weight),
3) ratio of over dry raw material weight (kg) and the total liquid measure volume of boiling (L) is 1: 5～6.5 (to be liquor ratio: 1: 5～6.5 in the digester; In the actual production, total liquid measure comprises the moisture in the raw material and adds the interior whole cooking liquors of digester), in the digestion process, boiling temperature is 164 ± 1 ℃, and cooking pressure is 0.64 ± 0.01MPa, and digestion time is 210～240 minutes;
4) Kappa number does not steam and separates the thing trace 8～15 after the boiling, and viscosity is 1200～1400dm
3/ kg, the whiteness after washing, screening can reach 42.1%, and the screening reject rate of bagasse slurry is only about less than 2%.
Three sections pressurized screen screening systems of (current popular) advanced sealing, four sections 15m are adopted in washing
2The vacuum pulp washing machine countercurrent washing, traditional conventional hypochlorite four sectional bleaching process are adopted in bleaching, add hydrogen peroxide and (add 1～1.5%H in the alkali treatment section
2O
2), i.e. C-E
P-H
1-H
2Bleaching system is bleached, and the paper pulp after the bleaching is manufactured paper with pulp into the finished market product slurry by pulp machine and sold.
When reclaiming alkali lye, add suitable NaOH and sodium chloride and black liquor and be made into the cooking liquor that boiling is used again, (sulphidity is meant Na in the alkali lye to make its sulphidity reach 15%
2S content accounts for active alkali NaOH+Na
2The percentage of S content, during calculating, Na
2S and NaOH all are scaled Na
2O or NaOH and then calculating).
Claims (1)
1, a kind of method of vertically digesting bagasse pulp by anthraquinone sulfate process is characterized in that being undertaken by following:
1) liquid distribution plate is contained in the bottom that the vertical digester upper circular tube exports, the finely dispersed eyelet of Φ 20mm is arranged on the liquid distribution plate;
2) digesting technoloy:
1. bagasse is packed in the upright steamer, beat water at the bottom of the part before the dress pot, liquid soaks the dress pot, the dress pot the bottom of a pan simultaneously led to steam 15～20 minutes, the logical steam in bottom, dress pot back heats up 70～90 ℃, softening bagasse treats that pressure begins to start circulating pump to 0.4Mpa, carries out the soup circulation, and over dry bagasse raw material per ton adds 0.5 kilogram anthraquinone auxiliary agent;
2. when the bagasse raw material is filled, add NaOH 10～13% and sodium sulfide amount 10～12% in over dry bagasse weight;
3. the ratio of over dry raw material weight (kg) and the total liquid measure volume of boiling (L) is 1: 5～6.5 in the digester; In the digestion process, boiling temperature is 164 ± 1 ℃, and cooking pressure: 0.64 ± 0.01MPa, digestion time are 210-240 minute;
4. Kappa number does not steam and separates the thing trace 8～15 after the boiling, and viscosity is 1200～1400dm
3/ kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100109052A CN100560860C (en) | 2006-05-18 | 2006-05-18 | The method of vertically digesting bagasse pulp by anthraquinone sulfate process |
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|---|---|---|---|
| CNB2006100109052A CN100560860C (en) | 2006-05-18 | 2006-05-18 | The method of vertically digesting bagasse pulp by anthraquinone sulfate process |
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| Publication Number | Publication Date |
|---|---|
| CN1865584A CN1865584A (en) | 2006-11-22 |
| CN100560860C true CN100560860C (en) | 2009-11-18 |
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| CNB2006100109052A Expired - Fee Related CN100560860C (en) | 2006-05-18 | 2006-05-18 | The method of vertically digesting bagasse pulp by anthraquinone sulfate process |
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| CN103194923B (en) * | 2013-04-25 | 2015-09-30 | 昆明理工大学 | A kind of use founds the preparation method that pot alkaline cooking exempts to cut rice wheat straw |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247250A (en) * | 1999-09-21 | 2000-03-15 | 中国科学院广州化学研究所 | Pulping technology by dissolving eucalyptus |
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2006
- 2006-05-18 CN CNB2006100109052A patent/CN100560860C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247250A (en) * | 1999-09-21 | 2000-03-15 | 中国科学院广州化学研究所 | Pulping technology by dissolving eucalyptus |
Non-Patent Citations (4)
| Title |
|---|
| 甘蔗渣制浆技术研究进展. 刘星生，张鸿雁，黄国林.江西化工，第1期. 2005 |
| 甘蔗渣制浆技术研究进展. 刘星生，张鸿雁，黄国林.江西化工，第1期. 2005 * |
| 甘蔗渣深度脱木素新工艺. 杨征月，徐博杰，王双飞.广西大学学报(自然科学版)，第22卷第3期. 1997 |
| 甘蔗渣深度脱木素新工艺. 杨征月，徐博杰，王双飞.广西大学学报(自然科学版)，第22卷第3期. 1997 * |
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| C14 | Grant of patent or utility model | ||
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| C56 | Change in the name or address of the patentee |
Owner name: SHUANGJIANG NANHUA CHEMICAL FIBER PULP CO., LTD. Free format text: FORMER NAME: YUNNAN LINCANG CITY JINGYING PAPER INDUSTRIAL CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 677300 Lincang Shuangjiang County in Yunnan province Mengla Mengla town Yunnan Lincang Jingying Paper Co. Ltd. Patentee after: Shuangjiang Nanhua chemical fibre pulp Co. Ltd. Address before: 677300 Lincang Shuangjiang County in Yunnan province Mengla Mengla town Yunnan Lincang Jingying Paper Co. Ltd. Patentee before: Yunnan Lincang City Jingying Paper Industrial Co., Ltd. |
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Address after: Double 677300 Jiangnan Shuangjiang County, Lincang City of Yunnan province Mengla Mengla town of North China Science pulp Co. Ltd. Patentee after: Shuangjiang Nanhua chemical fibre pulp Co. Ltd. Address before: 677300 Lincang Shuangjiang County in Yunnan province Mengla Mengla town Yunnan Lincang Jingying Paper Co. Ltd. Patentee before: Shuangjiang Nanhua chemical fibre pulp Co. Ltd. |
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Owner name: YUNNAN SHUANGJIANG HETAI BAMBOO INDUSTRY DEVELOPME Free format text: FORMER OWNER: SHUANGJIANG NANHUA CHEMICAL FIBER PULP CO., LTD. Effective date: 20131216 |
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Effective date of registration: 20131216 Address after: 677300 Lincang Shuangjiang County in Yunnan province Mengla Mengla town Yunnan Shuangjiang and Bamboo Industry Development Co. Ltd. Patentee after: Yunnan Shuangjiang and Bamboo Industry Development Co. Ltd. Address before: Double 677300 Jiangnan Shuangjiang County, Lincang City of Yunnan province Mengla Mengla town of North China Science pulp Co. Ltd. Patentee before: Shuangjiang Nanhua chemical fibre pulp Co. Ltd. |
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Granted publication date: 20091118 Termination date: 20140518 |