CN102888773A - Technique for preparing bamboo pulp by cooking to two-grade full-liquid-phase sulphate - Google Patents
Technique for preparing bamboo pulp by cooking to two-grade full-liquid-phase sulphate Download PDFInfo
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- CN102888773A CN102888773A CN2012103935986A CN201210393598A CN102888773A CN 102888773 A CN102888773 A CN 102888773A CN 2012103935986 A CN2012103935986 A CN 2012103935986A CN 201210393598 A CN201210393598 A CN 201210393598A CN 102888773 A CN102888773 A CN 102888773A
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Abstract
The invention provides a preparation technique of bamboo pulp by a bamboo material, and belongs to the technical field of chemical fibers. The preparation technique of the bamboo pump comprises the following steps of: cutting the bamboo material into bamboo chips which are 20-50mm in length and 10-20mm in width; washing, and putting the bamboo chips into a pot; finishing the cooking to first-grade full-liquid-phase (i.e., the bamboo chips in the cooking pot are just immersed by the cooking liquid in the cooking pot) sulphate, wherein the cooking liquid is high-alkali-concentration black liquid discharged in the cooking of the second-grade full-liquid-phase sulphate; exchanging the black liquid of the first-grade cooking by pumping the fresh alkali liquid to perform the second-grade full-liquid-phase cooking; recovering the heat energy of the black liquid discharged in the first-grade full-liquid-phase cooking, and then sending the black liquid for alkali recovery; fully recovering the black liquid discharged in the cooking to the second-grade full-liquid-phase sulphate; after the two-grade cooking is finished, dressing by washing, and then performing O-D0-EOP-D1 bleaching and acid treatment; and finally, making the bamboo pulp. By the preparation technique, the bamboo pulp is uniform and stable in mass, and low in lignin content; the black liquid is high in Baume degree and small in erosion to equipment; waste water and water gas are easy to treat; and the investment cost is saved. The prepared bamboo pulp is used for producing viscose.
Description
Technical field
The present invention relates to the technique that the full liquid phase sulphate cook of a kind of two-stage prepares bamboo pulp, belong to chemical fiber field.
Background technology
Because recent years, people were to the Devoting Major Efforts To Developing of environmental protection, renewable resource, the utilization rate of bamboo resource constantly is improved, as the bamboo pulp of high added value, so unique moisture-absorbing sweat-removing after the spinning, antibiotic, anti-ultraviolet function and fierce market competition situation occurred.People constantly repay the new explained hereafter bamboo pulp of examination and have also obtained many progress.Except traditional sulphite process, prehydrolytic sulfate process, developed again alkaline-heating method twice, this technology investment is low, carrying capacity of environment is light, quite is fit to small business and adopts.Specifically, mainly contain four large class techniques, the one, adopt the bleached bamboo pulp plate to carry out secondary boiled degenerative treatments; The 2nd, adopt and do not float true qualities bamboo pulp plate and after preimpregnation mixes, carry out secondary boiledly, carry out again bleaching; The 3rd, adopt bamboo chip to copy the well-thought-out plan pulpboard through the after bleaching of a sulphate cook pulping, carry out again the secondary soda cooking; The 4th, adopt bamboo chip to precook through micro-caustic soda first, carry out again the soda cooking second time, then carry out bleaching.In the above four class techniques, first three plants technique carrying out all must using rotary spherical digester when secondary boiled, has limited its production capacity, and the cooking liquor of this four classes technique is lower than all, and the uniformity of reaction is not good enough, and products obtained therefrom first fibre content is generally about 90%, and the degree of polymerization is lower.
Summary of the invention
The purpose of this invention is to provide the technique that the full liquid phase sulphate cook of a kind of two-stage prepares bamboo pulp.The full liquid phase cooking of this process using two-stage, adverse current boiling technology, not only greatly improved the bamboo pulp quality uniformity, improved and sent the evaporation black liquid wave hairdressing, but also saved the heating-up time, the purpose that reached energy-saving and emission-reduction, increases production and improves productivity; The present invention does not have acid solution to produce owing to not adopting pre-hydrolysis technique, and digesting apparatus is not had specific (special) requirements, does not need to design the stainless steel digester, can save most of investment.
The present invention adopts the D0-EOP-D1 bleaching process, makes to float the characteristics that disposed slurry has that whiteness is high, intensity is suitable, the fine content of first is high, and the content of alphacellulose of bamboo pulp can reach 95%, and yield reaches 33%, has good reactivity worth.
Technique of the present invention comprises following processing step:
(1) get the raw materials ready: bamboo wood is cut into long 20-50mm, the rectangle bamboo chip of wide 10-20 mm, qualification rate reaches more than 80%.
(2) wash material: bamboo chip removes the impurity on surface after washing material, and the clarity that improves pulp for rear operation creates conditions.
(3) the full liquid phase sulphate cook of the first order: carry out in digester, used cooking liquor all is that the second level full liquid phase sulphate cook terminal point discharges high-alkali concentrated black liquid.Technological parameter is: this section total alkali is with Na
2The O meter is 12-18% to over dry bamboo chip weight, and sulphidity is with Na
2O counts 15-25%, and 0.65-0.75MPa protected 90-180 minute.
(4) the full liquid phase sulphate cook in the second level: carry out in digester, used cooking liquor all is fresh alkali lye, pumps into after the full liquid phase sulphate cook of the first order finishes; Meanwhile, the first order boiling high temperature black liquor that displaces send corresponding storagetank, send alkali to reclaim behind the recovery heat energy.The black liquor that the full liquid phase sulphate cook in the second level finishes to discharge all carries out reuse, as the full liquid phase sulphate cook of first order boiling alkali lye.Technological parameter is: this section total alkali is with Na
2The O meter is 22-30% to exhausted bamboo chip weight, and sulphidity is with Na
2O counts 15-25%, and 0.65-0.75 MPa protected 90-180 minute.
(5) reclaim after second level boiling is finished and put pot operation, the gained slurry is copied into pulp after acid treatment is floated in washing.By this technique gained bamboo pulp for cellulose viscose, content of alphacellulose 〉=94%, pentosan≤4.5%, whiteness 〉=82%, iron part≤20ppm, ash content≤0.12%.
The specific embodiment
The specific embodiment that is prepared bamboo pulp by bamboo wood is as follows:
Embodiment 1
Bamboo wood is pressed 200kg/m after washing material through getting the raw materials ready
3Dress pot density install pot after, carry out the full liquid phase sulphate cook of the first order.Used cooking liquor is that the second level full liquid phase sulphate cook terminal point discharges high concentrated base black liquor, the digester inner cooking liquid complete bamboo chip in the submergence digester just during boiling.Technological parameter is: alkali charge is with Na
2The O meter is to over dry bamboo chip weight 12%, and sulphidity is with Na
2O meter 17%, 0.65MPa protected 120 minutes.First order boiling finishes to discharge black liquor, adds fresh alkali lye by the alkali charge that the over dry bamboo chip is weighed 26%, and alkali lye sulphidity 17% carries out the full liquid phase sulphate cook in the second level, and 0.65MPa protects blowing after 120 minutes.The gained slurry carries out acid treatment behind washing, screening and ClO 2 bleaching, copy into pulpboard at last, gets the bleached bamboo pulp dregs of rice, content of alphacellulose 94%, whiteness 82%, iron part 18ppm, ash content 0.10%.
Embodiment 2
After bamboo wood is washed material through getting the raw materials ready, install pot by the dress pot density of 200kg/m3 after, carry out the full liquid phase sulphate cook of the first order.Used cooking liquor is that the second level full liquid phase sulphate cook terminal point discharges high-alkali concentrated black liquid, the digester inner cooking liquid complete bamboo chip in the submergence digester just during boiling.Technological parameter is: alkali charge is with Na
2The O meter is to over dry bamboo chip weight 18%, and sulphidity is with Na
2O meter 20%, 0.7MPa protected 120 minutes.Then add fresh alkali lye by the alkali charge that the over dry bamboo chip is weighed 22%, alkali lye sulphidity 20% carries out the full liquid phase sulphate cook in the second level, and 0.70MPa protects blowing after 120 minutes.The gained slurry carries out acid treatment behind washing, screening and ClO 2 bleaching, copy into pulpboard at last, gets the bleached bamboo pulp dregs of rice, content of alphacellulose 94.5%, whiteness 88%, iron part 15ppm, ash content 0.09%.
Embodiment 3
After bamboo wood is washed material through getting the raw materials ready, install pot by the dress pot density of 200kg/m3 after, carry out the full liquid phase sulphate cook of the first order.Used cooking liquor is that the second level full liquid phase sulphate cook terminal point discharges high-alkali concentrated black liquid, the digester inner cooking liquid complete bamboo chip in the submergence digester just during boiling.Technological parameter is: alkali charge is with Na
2The O meter is to over dry bamboo chip weight 16%, and sulphidity is with Na
2O meter 20%, 0.75MPa protected 90 minutes.Then add fresh alkali lye by the alkali charge that the over dry bamboo chip is weighed 24%, alkali lye sulphidity 20% carries out the full liquid phase sulphate cook in the second level, and 0.75MPa protects blowing after 90 minutes.The gained slurry carries out acid treatment behind washing, screening and ClO 2 bleaching, copy into pulpboard at last, gets the bleached bamboo pulp dregs of rice, content of alphacellulose 95.2%, whiteness 86%, iron part 11ppm, ash content 0.1%.
Claims (2)
1. the full liquid phase sulphate cook of two-stage prepares the technique of bamboo pulp, comprises following steps: get the raw materials ready, wash material, the full liquid phase sulphate cook of the first order, the full liquid phase sulphate cook in the second level, wash and copy into pulp after floating acid treatment again, it is characterized in that:
(1) described getting the raw materials ready is that bamboo wood is cut into the specification bamboo chip that 20-50mm is long, 10-20mm is wide;
(2) the described material of washing is to wash the impurity such as silt particle that bamboo chip removes out the bamboo chip surface, irony, colloid with water;
(3) the full liquid phase sulphate cook of the described first order carries out in digester, and used cooking liquor discharges high concentrated base black liquor for the second level full liquid phase sulphate cook terminal point entirely; Technological parameter is: this section total alkali is with Na
2The O meter is 12-18% to over dry bamboo chip weight, and sulphidity is with Na
2O counts 15-25%, and 0.65-0.75MPa protected 90-180 minute;
(4) the full liquid phase sulphate cook in the described second level carries out in digester, used cooking liquor is fresh alkali lye entirely, after finishing, the full liquid phase sulphate cook of the first order pumps into, meanwhile, the first order boiling high temperature black liquor that displaces send corresponding storagetank, send alkali to reclaim after reclaiming heat energy, the black liquor that the full liquid phase sulphate cook in the second level finishes to discharge all carries out reuse, as the full liquid phase sulphate cook of first order alkali lye; Technological parameter is: this section total alkali is with Na
2The O meter is 22-30% to exhausted bamboo chip weight, and sulphidity is with Na
2O counts 15-25%, and 0.65-0.75 MPa protected 90-180 minute; The gained slurry is copied into pulp through washing and screening after bleaching acid treatment;
(5) described fresh alkali lye is NaOH and Na
2The mixed liquor of S.
2. preparation technology according to claim 1 is characterized in that, after described steaming stage finishes, and the content of alphacellulose of gained slurry 〉=95%, pentosan≤5%, average degree of polymerization are 550-650; After described bleaching section finishes, the content of alphacellulose of gained slurry 〉=94%, pentosan≤5.0%, average degree of polymerization are 450-550, whiteness 82-86%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116145457A (en) * | 2022-11-24 | 2023-05-23 | 泰盛科技（集团）股份有限公司 | Preparation method of bleached bamboo pulp |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974921A (en) * | 2006-12-18 | 2007-06-06 | 河北吉藁化纤有限责任公司 | Method for producing bamboo pomace |
| CN101158122A (en) * | 2007-11-15 | 2008-04-09 | 宜宾纸业股份有限公司 | Bamboo dissolved pulp manufacturing technique |
| WO2008074220A1 (en) * | 2006-12-18 | 2008-06-26 | Hebei Jigao Chemical Fiber Co., Ltd. | A preparation method of a bamboo pulp |
| CN101446052A (en) * | 2008-12-24 | 2009-06-03 | 宜宾长毅浆粕有限责任公司 | Secondary decatizing method for preparing bamboo chemical dissolving pulp and application thereof |
| CN101457494A (en) * | 2008-12-24 | 2009-06-17 | 宜宾长毅浆粕有限责任公司 | Production method of bamboo chemical dissolving pulp |
| CN101748630A (en) * | 2009-12-14 | 2010-06-23 | 昆明理工大学 | Acid-free pre-hydrolysis enzymolysis-free method for preparing bamboo pulp of Dendrocalamus giganteus Munro series |
| CN102182086A (en) * | 2011-03-25 | 2011-09-14 | 四川永丰纸业股份有限公司 | Method for preparing bamboo pulp by full-liquid-phase prehydrolysis sulfate displacement cooking process |
| CN102321990A (en) * | 2011-09-16 | 2012-01-18 | 四川永丰纸业股份有限公司 | Method for preparing bamboo pulp with full liquid phase pre-hydrolytic sulfate rapid displacement cooking |
-
2012
- 2012-10-17 CN CN201210393598.6A patent/CN102888773B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974921A (en) * | 2006-12-18 | 2007-06-06 | 河北吉藁化纤有限责任公司 | Method for producing bamboo pomace |
| WO2008074220A1 (en) * | 2006-12-18 | 2008-06-26 | Hebei Jigao Chemical Fiber Co., Ltd. | A preparation method of a bamboo pulp |
| CN101158122A (en) * | 2007-11-15 | 2008-04-09 | 宜宾纸业股份有限公司 | Bamboo dissolved pulp manufacturing technique |
| CN101446052A (en) * | 2008-12-24 | 2009-06-03 | 宜宾长毅浆粕有限责任公司 | Secondary decatizing method for preparing bamboo chemical dissolving pulp and application thereof |
| CN101457494A (en) * | 2008-12-24 | 2009-06-17 | 宜宾长毅浆粕有限责任公司 | Production method of bamboo chemical dissolving pulp |
| CN101748630A (en) * | 2009-12-14 | 2010-06-23 | 昆明理工大学 | Acid-free pre-hydrolysis enzymolysis-free method for preparing bamboo pulp of Dendrocalamus giganteus Munro series |
| CN102182086A (en) * | 2011-03-25 | 2011-09-14 | 四川永丰纸业股份有限公司 | Method for preparing bamboo pulp by full-liquid-phase prehydrolysis sulfate displacement cooking process |
| CN102321990A (en) * | 2011-09-16 | 2012-01-18 | 四川永丰纸业股份有限公司 | Method for preparing bamboo pulp with full liquid phase pre-hydrolytic sulfate rapid displacement cooking |
Non-Patent Citations (2)
| Title |
|---|
| 宋建新等: ""浅谈置换蒸煮技术和横管连蒸技术"", 《华东纸业》 * |
| 郭三川等: ""蒸煮条件对硫酸盐法竹浆性能的影响"", 《中国造纸》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116145457A (en) * | 2022-11-24 | 2023-05-23 | 泰盛科技（集团）股份有限公司 | Preparation method of bleached bamboo pulp |
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Effective date of registration: 20200724 Address after: Group 2, Guangzhao village, Jiangmen Town, Xuyong County, Luzhou City, Sichuan Province, 646400 Patentee after: Luzhou Yongfeng pulp and Paper Co., Ltd Address before: 614500, Yongfu street, Muchuan County, Leshan, Sichuan Patentee before: SICHUAN YONGFENG PAPER-MAKING JOINT-STOCK Co.,Ltd. |
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