CN1098389C - 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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- CN1098389C CN1098389C CN99111449A CN99111449A CN1098389C CN 1098389 C CN1098389 C CN 1098389C CN 99111449 A CN99111449 A CN 99111449A CN 99111449 A CN99111449 A CN 99111449A CN 1098389 C CN1098389 C CN 1098389C
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Abstract
The present invention relates to a pollution-free method for making pulp by exploding straw plants by low-pressure steam, which belongs to the field of pulping for paper making. The present invention is characterized in that the method comprises: putting roughly cut straw plants with the length of 20 to 30mm into a steam explosion tank; adding water with the weight accounting for approximately 34% of the dry weight of the raw materials in a spraying mode, and processing the raw materials and the water at the pressure of 1.2 to 1.7MPa for about 10 minutes; then, instantly reducing and releasing the pressure to obtain steam exploded straw plants; extracting the obtained steam exploded straw plants in 5 times of water for three times until paper is made through the traditional technology. The obtained pulp has good performance, and the method avoids the defects of environment pollution caused by paper making production, straw resource waste, etc.
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.
Fig. 1. flow diagram of the present invention.
Straw plant is compared with timber as can be seen from Table 1, no matter in chemical composition, or 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 processed of straw plant Steam explosive machine, in the quick-fried process of straw plant vapour, not only have hemicellulose from the body hydrolysis, and also have the easy degradation of lignin. For example just can get the paper pulp of merit by regulating different initial moisture contents. In addition, under the quick-fried processing intensity of certain vapour, the acid-base value of the quick-fried reaction medium of vapour and initial moisture content are the key factors of the existing quick-fried technique of vapour of impact.
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 forms | 90% xylan | 80-90% xylan (leaf wood) 60-70% mannose (needlebush) | |
| Cellulose crystallity | 40-60％ | 60-80％ | |
| The Organic extraction thing | Below 1% | 4% needlebush is below 1%, leaf wood | |
| Ash content | 8% (60% is SiO2) | (CaO, k below 1%2O，Na 2O) | |
| Fiber characteristics | 1.0-1.5mm long | 5mm is long | |
| Fiber fines | 39％ | 5% (needlebush) 25% (leaf wood) | |
The present invention does not add the pollution-free method of the quick-fried straw plant of chemicals low-pressure steam paper pulp processed, is based on straw plant and the timber difference on chemical composition and structure, opens up the new method of straw plant cleaning paper pulp processed. It has avoided being suitable for the cardboard manufacturing because the shortcomings such as the pollution that paper production causes to environment and stalk resource waste realize straw plant cleaning paper pulp processed 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
The manufacture paper with pulp rerum natura check of pattern of table 3
| 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 |
Different preliminary treatment were to the influence (1.5Mpa, 10 minutes) 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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| Application Number | Priority Date | Filing Date | Title |
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| CN99111449A CN1098389C (en) | 1999-08-13 | 1999-08-13 | Pollution-less low-pressure steam decrepitation process of making straw pulp |
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| CN99111449A CN1098389C (en) | 1999-08-13 | 1999-08-13 | Pollution-less low-pressure steam decrepitation process of making straw pulp |
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| CN1098389C true CN1098389C (en) | 2003-01-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101230545B (en) * | 2008-02-26 | 2012-02-15 | 侯梦斌 | Method for preparing slurry by blast process |
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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 |
| 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 |
| CN103358377B (en) * | 2012-04-01 | 2016-02-24 | 中国科学院过程工程研究所 | The preparation method of the glue-free environment friendly artificial board of a kind of steam puffed stalk |
| 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 |
| 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 |
| CN106758450B (en) * | 2016-12-30 | 2018-01-30 | 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0849394A1 (en) * | 1996-12-19 | 1998-06-24 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Method for increasing the bulk of fibrous material, and apparatus for treating fibrous material |
| WO1999018285A1 (en) * | 1997-10-07 | 1999-04-15 | Weyerhaeuser Company | Method for processing straw into pulp and paper product therefrom |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0849394A1 (en) * | 1996-12-19 | 1998-06-24 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Method for increasing the bulk of fibrous material, and apparatus for treating fibrous material |
| WO1999018285A1 (en) * | 1997-10-07 | 1999-04-15 | Weyerhaeuser Company | Method for processing straw into pulp and paper product therefrom |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101230545B (en) * | 2008-02-26 | 2012-02-15 | 侯梦斌 | Method for preparing slurry by blast process |
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