CN1284585A - Pollution-less low-pressure steam decrepitation process of making straw pulp - Google Patents
Pollution-less low-pressure steam decrepitation process of making straw pulp Download PDFInfo
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- CN1284585A CN1284585A CN 99111449 CN99111449A CN1284585A CN 1284585 A CN1284585 A CN 1284585A CN 99111449 CN99111449 CN 99111449 CN 99111449 A CN99111449 A CN 99111449A CN 1284585 A CN1284585 A CN 1284585A
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Abstract
The present invention relates to paper wood pulping, and features that after plant straw cut to 20-30 mm length is fed to a decrepitation cylinder and water in abour 34 % of the dry material is sprayed, the plant straw is treated at 1.2-1.7 MPa pressure for abour 10 min and then decompression relieved to obtain steam decrepitated straw, which is then extracted with five times of water for three times to obtain paper pulp. The present invention can produce paper pulp with excellent ferformance and can prevent environment pollution caused by paper pulp production and waste of straw source.
Description
The invention belongs to the paper-making pulping field, particularly utilize the pollution-free method of low pressure steam puffed stalk class plant system paper pulp.
Graceful gloomy (the Mason of the U.S., W.H.), in United States Patent (USP) (U.S.Patent), 1,655,618,1928 have introduced the explosion pulping technology, and this technology uses the saturated steam of 7-8Mpa to carry out explosion as medium, but it is just used in Fibreboard Production, because of this technology burst pressure height, therefore be difficult to promote.In decades, various countries have carried out a large amount of research and experiments around this technology.Canadian Delong had invented the Iotech patent in 1980, used the wood chip of the saturated steam explosion of 3.8-5.2Mpa through Chemical Pretreatment.Domestic research to explosion pulping begins starting from the mid-80, and has delivered some research papers, and the common ground of these technologies is to be primarily aimed at timber, use earlier the chemicals pre-treatment of chips, carry out explosion again, owing to add a large amount of chemicalss, so caused great pollution to environment.
The object of the present invention is to provide a kind of pollution-free method of utilizing low pressure steam puffed stalk class plant system paper pulp, it utilizes abundant cheap straw plant resource, does not add chemicals cleaner production paper pulp, avoids because the pollution that paper causes to environment.
(Mr. Li Zhongzheng is in " Chinese papermaking " in chemical composition and structural difference to the present invention is based on straw plant and timber, (6): 22-29,1991 have introduced structural difference), proposition does not add the low pressure explosion method for making paper pulp of any chemicals to straw plant, opens up the new method of straw plant cleaning system paper pulp.
The present invention includes the processing of straw plant and slurries, it is characterized in that will be rough lumber be that the straw plant of 20-30 millimeters long is packed in the steam-explosion jar, with the water of spray pattern adding with respect to raw material dry weight about 34%, after the pressure of 1.2-1.7MPa is handled about 10 minutes down, instant decompression discharges, and promptly gets steam puffed stalk class plant; Gained steam puffed stalk class plant is with 5 times water extracting 3 times, (extract can be used for producing active oligomeric xylose in bursting charge dilution back after the extracting, concrete grammar is seen number of patent application 99105722.8) pull an oar with 10% concentration adding disc mill, up to obtaining paper with traditional handicraft.Remove fiber fines with pulp screen after promptly making beating finishes, after tapered desander purifies, be deployed into 1% the dense paper of directly copying of slurry again.
Operation sequence of the present invention is seen Fig. 1:
Straw plant is compared with timber as can be seen from Table 1, no matter in chemical composition, still all exists big-difference on the structure of lignin, hemicellulose.Quick-fried studies show that of many vapour to timber such as poplars must add the alkali preliminary treatment before vapour is quick-fried, its objective is to make lignin generation sulphofication, to reach vapour Selective Separation fiber when quick-fried.Draw from the analysis of straw plant Steam explosive machine system, in the quick-fried process of straw plant vapour, not only have hemicellulose, and also have the easy degradation of lignin from the body hydrolysis.For example by regulating the paper pulp that different initial moisture contents just can get merit.In addition, under the quick-fried processing intensity of certain vapour, the pH value of the quick-fried reaction medium of vapour and initial moisture content are the key factors of the existing quick-fried technology of vapour of influence.
The comparison of the chemical constitution of table 1 stalk and timber
Stalk | Timber | ||
Lignin | The phenolic hydroxyl group of lignin (C9 phenylpropyl alcohol alkane unit) | 0.4-0.45/C9 | ?0.1-0.3/C9 |
The carboxyl of lignin | 0.1-0.2/C9 | ---- | |
Right in the lignin-coumaric acid, ester bond ratio | 2. 60% | ---- ---- | |
Forulic acid in the lignin | α-ehter bond | ---- | |
Milled wood lignin quality molecular weight MW | 7500 | 18200 (birch) | |
Ratio V in unit in the lignin: S: H | 1∶0.77∶0.31 | 1: 1.2: 0.05 (leaf wood) 1: 0.02: 0.009 (needlebush) | |
Other | The hemicellulose degree of polymerization | 84 | >120 |
The hemicellulose structure is formed | 90% xylan | 80-90% xylan (leaf wood) 60-70% mannose (needlebush) | |
Cellulose crystallity | 40-60% | 60-80% | |
Organic extract | Below 1% | 4% needlebush is below 1%, leaf wood | |
Ash content | 8% (60% is SiO 2) | (CaO, K below 1% 2O,Na 2O) | |
Fiber characteristics | 1.0-1.5mm it is long | 5mm is long | |
Fiber fines | 39% | 5% (needlebush) 25% (leaf wood) |
The present invention does not add the pollution-free method of chemicals low pressure steam puffed stalk class plant system paper pulp, is based on straw plant and timber in chemical composition and structural difference, opens up the new method of straw plant cleaning system paper pulp.It has avoided being suitable for the cardboard manufacturing because shortcomings such as pollution that paper causes to environment and stalk resource waste realize straw plant cleaning system paper pulp and straw plant biomass complete utilization utilizing this law gained pulp property good.
Embodiment 11. steam exploded wheat straws
The stalk 80Kg that rough lumber is grown to the about 25mm 1M that packs into
3In the steam-explosion jar, with the water of spray pattern adding with respect to raw material dry weight about 34%, feed steam, wait to get rid of in the jar and close the charging valve behind the air, boost to 1.5MPa, kept 10 minutes, instant decompression release promptly gets steam exploded wheat straw.2. paper is copied in water extracting steam exploded wheat straw and slurrying
The gained steam exploded wheat straw is with 5 times water extracting 3 times, and the bursting charge after the extracting dilutes with water, and the concentration with 10% uses pulp screen (70 sieve mesh) to remove fiber fines in the making beating of PFI type disc mill then, is deployed into 1% the dense paper of directly copying of slurry after tapered desander purifies.Making beating is to copying the concrete technology of paper with the paper mill common method.The mensuration of pattern character is pressed national standard method.3. condition experiment conclusion (1) moisture of blasting technology is in 34.01% improve (seeing Table 2) that is beneficial to defibrination and pulp property simultaneously.(2) do not add (the seeing Table 3) that any chemicals papermaking properties is better than adding sodium sulfite and hydrochloric acid.(3) it is generally acknowledged, the yield height of slurry is very big with the medicine relation of adding, alkaline matter is beneficial to the raising of yield, but the experimental result of table 3 shows that with regard to the straw plant raw material, alkalescence reduces yield too by force on the contrary, and it is comparatively suitable to add 1.6% ammoniacal liquor, no matter be that yield or pulp property are all more excellent, and do not add any chemicals, the control steam puffed stalk class vegetable material of moisture about 34%, its pulping yield and performance are suitable with interpolation 1.6% ammoniacal liquor.(4) under the prerequisite of control straw kind plant moisture 34%, in the pressure limit of 1.2-1.7Mpa, kept pressure about 10 minutes, all can obtain pulp property preferably, and with 1.5Mpa, it is best that dimension is pressed 10 minutes, sees Table 4.
Different moisture content was to the influence (1.5Mpa, 10 minutes) of pulp property before table 2 vapour was quick-fried
Moisture (raw material) % | Yield % | Beating degree ° SR | Quantitative g/m 2 | Tensile strength KN/m | Fracture length Km | Tearability mN | Tear index mN.m 2/g |
15.11 | 79.4 | ?28.5 | ?56.7 | 0.91 | ?1.64 | ?287.2 | 5.06 |
57.50 | 72.3 | ?34.0 | ?53.2 | 2.34 | ?4.49 | ?326.4 | 6.14 |
34.01 | 83.4 | ?28.0 | ?54.7 | 2.02 | ?3.77 | ?462.4 | 8.46 |
The manufacture paper with pulp rerum natura check of pattern of table 3
Different preliminary treatment were to the influence (1.5Mpa, 1O minute) of pulp property before vapour was quick-fried
Add medicine (raw material) % | Yield % | Beating degree ° SR | Quantitative g/m 2 | Tensile strength KN/m | Fracture length Km | Tearability mN | Tear index mN.m 2/g |
0.8% hydrochloric acid | 60.1 | ?27.0 | ?44.8 | ?1.36 | ?3.10 | ?325.0 | ?4.26 |
1.6% ammoniacal liquor | 79.1 | ?33.5 | ?49.8 | ?2.36 | ?4.84 | ?578.6 | ?11.6 |
5.0% ammonium sulfate | 65.1 | ?22.5 | ?48.4 | ?0.97 | ?2.05 | ?248.0 | ?5.12 |
8.5% sodium sulfite, 5.0% NaOH | 75.4 | ?22.5 | ?47.9 | ?1.93 | ?4.12 | ?320.8 | ?6.70 |
4.0% sodium sulfite, 4.0% sodium carbonate | 81.1 | ?27 | ?47.2 | ?2.01 | ?3.95 | ?310.0 | ?6.50 |
The present invention's (34.0% water) | 82.0 | ?28.0 | ?48.7 | ?2.77 | ?4.53 | ?562.9 | ?12.1 |
The quick-fried condition of the different vapour of table 4 is to the influence (34% moisture) of pulp property
The quick-fried condition of different vapour | Yield % | Beating degree ° SR | Quantitative g/m 2 | Tensile strength KN/m | Fracture length Km | Tearability mN | Tear index mN.m 2/g |
1.2Mpa, 10min | 81.1 | 26 | 48.4 | 2.80 | 4.38 | 570.0 | 13.0 |
1.5Mpa, 10min | 80.0 | 27 | 48.7 | 2.77 | 4.53 | 562.9 | 12.1 |
1.7Mpa,10min | 78.4 | 28 | 47.9 | 2.64 | 4.27 | 558.0 | 11.7 |
Claims (2)
1. pollution-free method of utilizing low pressure steam puffed stalk class plant system paper pulp, comprise the processing of straw plant and slurries, it is characterized in that will be rough lumber be that the straw plant of 20-30 millimeters long is packed in the steam-explosion jar, with the water of spray pattern adding with respect to raw material dry weight about 34%, after the pressure of 1.2-1.7MPa is handled about 10 minutes down, instant decompression discharges, and promptly gets steam puffed stalk class plant; Gained steam puffed stalk class plant is with 5 times water extracting 3 times, and after the bursting charge dilution after the extracting, the concentration with 10% adds disc mill pulls an oar, up to obtaining paper with traditional handicraft.
2. the pollution-free method of utilizing low pressure steam puffed stalk class plant system paper pulp as claimed in claim 1 is characterized in that described pressure is 1.5Mpa.
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Cited By (14)
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CN1806945B (en) * | 2005-01-20 | 2010-05-12 | 中国科学院过程工程研究所 | Method for complete enzymolysis of straw cellulose by utilizing pretreatment and enzymolysis process |
CN101736646B (en) * | 2008-11-07 | 2011-05-11 | 中国科学院化学研究所 | Preparation method of reed or straw cellulose pulp |
CN102206928A (en) * | 2011-06-23 | 2011-10-05 | 北京中诺德瑞工业科技有限公司 | Method for blasting plant biomass walls with oxygen |
CN102230284A (en) * | 2011-05-06 | 2011-11-02 | 西南交通大学 | Ultrasonic-assistant steam explosion pretreatment process for extracting straw cellulose of crops |
CN102234948A (en) * | 2010-04-27 | 2011-11-09 | 中国科学院过程工程研究所 | Method for removing lignin by combined treatment of straws and laccase |
CN102268833A (en) * | 2011-07-26 | 2011-12-07 | 中国科学院过程工程研究所 | Method for preparing dissolving pulp by carrying out steam explosion on crop straw and adopting prehydrolytic sulfate process |
CN103358381A (en) * | 2012-04-01 | 2013-10-23 | 中国科学院过程工程研究所 | Method for producing steam exploded stalk binder-less artificial boards by alkali process |
CN103358377A (en) * | 2012-04-01 | 2013-10-23 | 中国科学院过程工程研究所 | Method for manufacturing binder-less environment-friendly artificial boards from steam-exploded stalks |
CN104611966A (en) * | 2014-12-04 | 2015-05-13 | 山东源根石油化工有限公司 | Novel pulping process with Chinese alpine rush as raw material |
CN105154986A (en) * | 2015-08-04 | 2015-12-16 | 江南大学 | Comprehensive cotton stalk base utilization method through combinations of alkali pretreatment, low pressure steam explosion and bio-enzyme treatment |
CN106638089A (en) * | 2016-09-27 | 2017-05-10 | 济南米铎碳新能源科技有限公司 | Method for preparing dissolving pulp and other high-value-added products by crop straws |
CN106758450A (en) * | 2016-12-30 | 2017-05-31 | 北京润拓工业技术有限公司 | A kind of quick-fried stalk production line of moment for converting pulp and its production technology |
CN106758451A (en) * | 2017-01-16 | 2017-05-31 | 深圳市龙城生物科技股份有限公司 | A kind of method of the swollen quick-fried method Removment of Lignin By Pretreatments of biorefinery enzyme combination steam |
CN111155347A (en) * | 2020-01-20 | 2020-05-15 | 天津科技大学 | Method for extracting poplar cellulose by coupling steam explosion method with weak alkali |
Families Citing this family (1)
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CN101230545B (en) * | 2008-02-26 | 2012-02-15 | 侯梦斌 | Method for preparing slurry by blast process |
Family Cites Families (2)
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NL1004844C2 (en) * | 1996-12-19 | 1998-06-22 | Tno | Method for thickening paper fibers. |
EP1021613A1 (en) * | 1997-10-07 | 2000-07-26 | Weyerhaeuser Company | Method for processing straw into pulp and paper product therefrom |
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1999
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Cited By (19)
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CN1806945B (en) * | 2005-01-20 | 2010-05-12 | 中国科学院过程工程研究所 | Method for complete enzymolysis of straw cellulose by utilizing pretreatment and enzymolysis process |
CN101736646B (en) * | 2008-11-07 | 2011-05-11 | 中国科学院化学研究所 | Preparation method of reed or straw cellulose pulp |
CN102234948A (en) * | 2010-04-27 | 2011-11-09 | 中国科学院过程工程研究所 | Method for removing lignin by combined treatment of straws and laccase |
CN102230284B (en) * | 2011-05-06 | 2012-11-07 | 西南交通大学 | Ultrasonic-assistant steam explosion pretreatment process for extracting straw cellulose of crops |
CN102230284A (en) * | 2011-05-06 | 2011-11-02 | 西南交通大学 | Ultrasonic-assistant steam explosion pretreatment process for extracting straw cellulose of crops |
CN102206928A (en) * | 2011-06-23 | 2011-10-05 | 北京中诺德瑞工业科技有限公司 | Method for blasting plant biomass walls with oxygen |
CN102206928B (en) * | 2011-06-23 | 2012-09-19 | 北京中诺德瑞工业科技有限公司 | Method for blasting plant biomass walls with oxygen |
CN102268833B (en) * | 2011-07-26 | 2013-08-21 | 中国科学院过程工程研究所 | Method for preparing dissolving pulp by carrying out steam explosion on crop straw and adopting prehydrolysis for sulfate |
CN102268833A (en) * | 2011-07-26 | 2011-12-07 | 中国科学院过程工程研究所 | Method for preparing dissolving pulp by carrying out steam explosion on crop straw and adopting prehydrolytic sulfate process |
CN103358381A (en) * | 2012-04-01 | 2013-10-23 | 中国科学院过程工程研究所 | Method for producing steam exploded stalk binder-less artificial boards by alkali process |
CN103358377A (en) * | 2012-04-01 | 2013-10-23 | 中国科学院过程工程研究所 | Method for manufacturing binder-less environment-friendly artificial boards from steam-exploded stalks |
CN103358381B (en) * | 2012-04-01 | 2016-02-24 | 中国科学院过程工程研究所 | The preparation method of a kind of alkaline process steam puffed stalk glue-free artificial board |
CN104611966A (en) * | 2014-12-04 | 2015-05-13 | 山东源根石油化工有限公司 | Novel pulping process with Chinese alpine rush as raw material |
CN105154986A (en) * | 2015-08-04 | 2015-12-16 | 江南大学 | Comprehensive cotton stalk base utilization method through combinations of alkali pretreatment, low pressure steam explosion and bio-enzyme treatment |
CN106638089A (en) * | 2016-09-27 | 2017-05-10 | 济南米铎碳新能源科技有限公司 | Method for preparing dissolving pulp and other high-value-added products by crop straws |
CN106638089B (en) * | 2016-09-27 | 2018-01-30 | 济南米铎碳新能源科技有限公司 | The method for preparing dissolving pulp and other high value added products using crop material |
CN106758450A (en) * | 2016-12-30 | 2017-05-31 | 北京润拓工业技术有限公司 | A kind of quick-fried stalk production line of moment for converting pulp and its production technology |
CN106758451A (en) * | 2017-01-16 | 2017-05-31 | 深圳市龙城生物科技股份有限公司 | A kind of method of the swollen quick-fried method Removment of Lignin By Pretreatments of biorefinery enzyme combination steam |
CN111155347A (en) * | 2020-01-20 | 2020-05-15 | 天津科技大学 | Method for extracting poplar cellulose by coupling steam explosion method with weak alkali |
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