CN102154886A - Pretreatment process for cleaning and bleaching chemical mechanical pulp - Google Patents
Pretreatment process for cleaning and bleaching chemical mechanical pulp Download PDFInfo
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- CN102154886A CN102154886A CN 201010611490 CN201010611490A CN102154886A CN 102154886 A CN102154886 A CN 102154886A CN 201010611490 CN201010611490 CN 201010611490 CN 201010611490 A CN201010611490 A CN 201010611490A CN 102154886 A CN102154886 A CN 102154886A
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Abstract
The invention relates to a cleaning and bleaching technology suitable for chemical mechanical pulp, particularly alkaline peroxide mechanical pulp (APMP). The process is mainly characterized in that: the APMP is pretreated by adopting compound biological enzyme before H2O2 bleaching, and diffusion of the enzyme in the pulp and role exertion of a laccase/mediator system are improved by using good compatibility of biological surfactant and enzyme preparation, so that the bleaching efficiency of the chemical mechanical pulp is improved, the final bleaching degree of the produced pulp is improved, the whiteness stability of the pulp is good, and the pulp can meet the requirements of paper products with high additional values. Meanwhile, the wastewater pollution load produced by bleaching the pulp is effectively reduced by biological enzyme pretreatment.
Description
Technical field
The present invention relates to pulp and paper technology, specifically is the method that is used for the chemi-mechanical pulp cleaning pretreatment, especially at Eucalyptus chemistry APMP production technology.
Background technology
At present China's pulp and paper industry is faced with also that there is lack of raw materials, the energy-intensive present situation.Chemi-mechanical pulp has become the development trend of pulp and paper industry with its paper pulp yield height, good, the low power consumption and other advantages of intensity.Because take to keep the pulping way of most lignins in the raw material, chemi-mechanical pulp is than the more difficult bleaching of chemical pulp.Owing to floating reasons such as agent cost and bleaching effect, chemi-mechanical pulp bleaching aspect only has hydrogen peroxide and sodium dithionite to float agent in industrial large-scale application for two kinds at present, but it floats back pulp brightness poor stability, brightness reversion very easily, and the contaminated wastewater load is heavier, limited its application aspect the high added value paper, the cleaning and bleaching technology solves this difficult problem to be badly in need of developing efficiently at present.
Developing and seek novel chemi-mechanical pulp bleaching agent and bleaching assistant, under the characteristic that keeps the high yield of paper pulp, obtain high whiteness paper pulp, and have lower YI yellow index, is the problem that domestic and international papermaker studies for a long time always.Mercaptan
[17]Derivative THPP, P (CH with phosphorus
2CH
2CH
2OH)
3Be considered to have simultaneously the double action of bleaching and stable whiteness, but these methods since exist the cost costliness, and many shortcomings such as fiber affinity difference cause the scope of application to be restricted.
Summary of the invention
In order to overcome the shortcoming that above-mentioned prior art exists, the object of the present invention is to provide a kind of chemi-mechanical pulp cleaning and bleaching preprocess method.Bleach preliminary treatment by composite biology enzyme, and utilize biosurfactant and the good compatibility of enzyme preparation, improving diffusion and the laccase/mediator systems of enzyme in paper pulp plays a role, can improve the bleaching efficiency of chemi-mechanical pulp, improve and float pulp brightness eventually, improve its retention of whiteness, reduce the contaminated wastewater load that association with pulp bleaching produces, the paper pulp of producing can satisfy the requirement of high added value paper product, and meets the policy guidance that China's paper industry is implemented cleaner production, carried out energy-saving and emission-reduction.
Technical scheme of the present invention is: the pretreated technology of a kind of chemi-mechanical pulp cleaning and bleaching, its feature exists
In: a kind of chemi-mechanical pulp cleaning and bleaching pretreating process, the pretreating process step is:
At Eucalyptus chemistry APMP production technology:
(1) existing with a certain amount of solid enzyme preparation: laccase, hemicellulase, cellulase according to a certain percentage, its enzyme amount of applying flexibly is that 10:20:1～2 join in the batch can;
(2) in batch can, add clear water then, the pH value is 6 ~ 7, and adding amboceptor HBT 2-(2 '-hydroxy phenyl) benzotriazole, consumption is according to 4 ~ 6 ‰ of the ton slurry, and non-ionic surface active agent TX-10 (octyl phenol polyoxyethylene ether), consumption stirs in batch can according to 2 ~ 6 ‰ of the ton slurry, rotating speed is 60-90r/min during stirring, and making concentration is the enzyme liquid of 10 ~ 30 %;
(3) stir after 2-5 minute, enzyme liquid is input in the finished product jar, storage temperature≤50 ℃;
(4) and add dilute sulfuric acid, regulate slurry pH value to 4.0～5.0 in the up-flow tower, temperature is 60 ~ 70 ℃, and starching dense is 13 ~ 17%;
(5) the enzyme liquid in the finished product jar is joined upflow tower, addition is: slurry per ton is incorporated as 2-3L;
(6) reaction time is 50-70min in the up-flow tower, enters H through washing afterwards
2O
2Bleachery.
Wherein storage temperature≤50 of storage temperature ℃ in the step (3) prevent enzyme deactivation, use in order to subsequent treatment;
Original technological process of production is a raw material behind master mill, dilution stock tank, thickening and washing, the pond of directly advancing to divert oneself, and screw extruder, the back adds a up-flow tower between thickening and washing and pastime pond now; Raw material enters the up-flow tower behind master mill, dilution stock tank, thickening and washing.
The concentration preferred concentration of dilute sulfuric acid is 2% in the step (5).
Experimental result is seen shown in Figure 1
The invention has the beneficial effects as follows:By composite mixed enzyme preliminary treatment chemi-mechanical pulp, can improve the bleachability of chemi-mechanical pulp, reduce the consumption of chemicals in the following bleaching process, reduce the environmental pollution that bleaching waste liquor brings, can also improve the physical property of paper pulp and the stability of whiteness, solve the problem of the easy brightness reversion of chemi-mechanical pulp.Before the chemi-mechanical pulp bleaching, increase the complex enzyme pretreating process and not only can improve production efficiency, reduce production costs, can also energy savings.Waste water load is polluted and is reduced, and the raising of BOD/COD ratio, proves that Biodegradability of Wastewater improves.
Description of drawings
Fig. 1 is this pretreating process of employing and the experimental result that does not adopt pretreating process and drawn.
The specific embodiment
Further specify technical scheme of the present invention below by specific embodiment, but technical scheme of the present invention is not exceeded with embodiment.
Embodiment 1
(1) existing with a certain amount of solid enzyme preparation: laccase, hemicellulase, cellulase are according to a certain percentage, its enzyme amount of applying flexibly is 10:20:1, wherein laccase activity joins in the batch can for ton slurry 30000IU, xylanase activity are that 60000U, cellulase activity are 3000U;
(2) in batch can, add clear water then, the pH value is 6, and adding amboceptor HBT 2-(2 '-hydroxy phenyl) benzotriazole, consumption is according to 5 ‰ of the ton slurry, and non-ionic surface active agent TX-10 octyl phenol polyoxyethylene ether, consumption stirs in batch can according to 2.5 ‰ of the ton slurry, rotating speed is 65r/min during stirring, and making concentration is the enzyme liquid of 20 %;
(3) stir after 3 minutes, enzyme liquid is input in the finished product jar 50 ℃ of storage temperatures;
(4) add 2% dilute sulfuric acid, regulate slurry pH value to 4.0 in the up-flow tower, temperature is 60 ℃, and starching dense is 13%;
(5) the enzyme liquid in the finished product jar is joined upflow tower, addition is: slurry per ton is incorporated as 3L;
(6) reaction time is 60min in the up-flow tower, enters H through washing afterwards
2O
2Bleachery.
Embodiment 2
(1) existing with a certain amount of solid enzyme preparation: laccase, hemicellulase, cellulase are according to a certain percentage, its enzyme amount of applying flexibly is 10:20:2, wherein laccase activity joins in the batch can for ton slurry 30000IU, xylanase activity are that 60000U, cellulase activity are 6000U;
(2) in batch can, add clear water then, the pH value is 7, and adding amboceptor HBT 2-(2 '-hydroxy phenyl) benzotriazole, consumption is according to 4 ‰ of the ton slurry, and non-ionic surface active agent TX-10 octyl phenol polyoxyethylene ether, consumption stirs in batch can according to 3 ‰ of the ton slurry, rotating speed is 85r/min during stirring, and making concentration is the enzyme liquid of 10 %;
(3) stir after 3 minutes, enzyme liquid is input in the finished product jar 45 ℃ of storage temperatures;
(4) and add dilute sulfuric acid, regulate slurry pH value to 5.0 in the up-flow tower, temperature is 65 ℃, and starching dense is 15%;
(5) the enzyme liquid in the finished product jar is joined upflow tower, addition is: slurry per ton is incorporated as 3L;
(6) reaction time is 60min in the up-flow tower, enters H through washing afterwards
2O
2Bleachery.
Embodiment 3
(1) existing with a certain amount of solid enzyme preparation: laccase, hemicellulase, cellulase are according to a certain percentage, its enzyme amount of applying flexibly is 10:20:1, wherein laccase activity joins in the batch can for ton slurry 30000IU, xylanase activity are that 60000U, cellulase activity are 3000U;
(2) in batch can, add clear water then, the pH value is 6.5, and adding amboceptor HBT 2-(2 '-hydroxy phenyl) benzotriazole, consumption is according to 6 ‰ of the ton slurry, and non-ionic surface active agent TX-10 (octyl phenol polyoxyethylene ether), consumption stirs in batch can according to 2 ‰ of the ton slurry, rotating speed is 90r/min during stirring, and making concentration is the enzyme liquid of 25 %;
(3) stir after 3 minutes, enzyme liquid is input in the finished product jar 35 ℃ of storage temperatures;
(4) and add 2% dilute sulfuric acid, regulate slurry pH value to 4.5 in the up-flow tower, temperature is 70 ℃, and starching dense is 17%;
(5) the enzyme liquid in the finished product jar is joined upflow tower, addition is: slurry per ton is incorporated as 3L;
(6) reaction time is 60min in the up-flow tower, enters H through washing afterwards
2O
2Bleachery.
Claims (5)
1. pretreated technology of chemi-mechanical pulp cleaning and bleaching, it is characterized in that: the pretreating process concrete steps are: (1) is existing with a certain amount of solid enzyme preparation: laccase, hemicellulase, cellulase according to a certain percentage, its enzyme amount of applying flexibly is that 10:20:1～2 join in the batch can;
(2) in batch can, add clear water then, the pH value is 6 ~ 7, and adding amboceptor HBT 2-(2 '-hydroxy phenyl) benzotriazole, consumption is according to 4 ~ 6 ‰ of the ton slurry, and non-ionic surface active agent TX-10 octyl phenol polyoxyethylene ether, consumption stirs in batch can according to 2 ~ 6 ‰ of the ton slurry, rotating speed is 60-90r/min during stirring, and making concentration is the enzyme liquid of 10 ~ 30 %;
(3) stir after 2-5 minute, enzyme liquid is input in the finished product jar;
(4) add dilute sulfuric acid, regulate slurry pH value to 4.0～5.0 in the up-flow tower, temperature is 60 ~ 70 ℃, and starching dense is 13 ~ 17%;
(5) the enzyme liquid in the finished product jar is joined upflow tower, addition is: slurry per ton is incorporated as 2-3L;
(6) reaction time is 50-70min in the up-flow tower, enters H through washing afterwards
2O
2Bleachery.
2. the pretreated technology of chemi-mechanical pulp cleaning and bleaching as claimed in claim 1 is characterized in that: described technology is especially at the chemical APMP production technology of Eucalyptus.
3. the pretreated technology of chemi-mechanical pulp cleaning and bleaching as claimed in claim 1 is characterized in that: in the step (1), described laccase activity is ton slurry 30000IU;
The pretreated technology of chemi-mechanical pulp cleaning and bleaching as claimed in claim 1 is characterized in that: storage temperature in the step (3)≤50 ℃.
4. the pretreated technology of chemi-mechanical pulp cleaning and bleaching as claimed in claim 1 is characterized in that: the concentration of step (4) dilute sulfuric acid is preferably 2%.
5. the pretreated technology of chemi-mechanical pulp cleaning and bleaching as claimed in claim 1 is characterized in that: described step (5) addition is: slurry per ton is incorporated as 3L.
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| CN2010106114900A CN102154886B (en) | 2010-12-29 | 2010-12-29 | Pretreatment process for cleaning and bleaching chemical mechanical pulp |
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| CN2010106114900A CN102154886B (en) | 2010-12-29 | 2010-12-29 | Pretreatment process for cleaning and bleaching chemical mechanical pulp |
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| CN102154886B CN102154886B (en) | 2012-07-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939525A (en) * | 2017-04-28 | 2017-07-11 | 山东冠军纸业有限公司 | A kind of method that reduction APMP starches YI yellow index |
| CN111270551A (en) * | 2020-03-26 | 2020-06-12 | 陕西科技大学 | Mild pretreatment and disc grinding chemical treatment alkaline hydrogen peroxide mechanical pulping method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441412A (en) * | 2014-09-29 | 2016-03-30 | 湖南新鸿鹰生物工程有限公司 | Paper pulp bleaching compound enzyme and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0247865A (en) * | 1988-08-10 | 1990-02-16 | Nec Corp | Manufacture of semiconductor integrated circuit device |
| CN1920167A (en) * | 2005-08-24 | 2007-02-28 | 边静 | Pulping method of non-wood-fiber enzymatic slurry |
| CN101230552A (en) * | 2008-01-23 | 2008-07-30 | 山东轻工业学院 | Technique for chemomechanical pulp-making of poplar wood |
| CN101302724A (en) * | 2008-06-23 | 2008-11-12 | 王新军 | Medicament agent for environment friendly pulping and environment friendly pulping process |
-
2010
- 2010-12-29 CN CN2010106114900A patent/CN102154886B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0247865A (en) * | 1988-08-10 | 1990-02-16 | Nec Corp | Manufacture of semiconductor integrated circuit device |
| CN1920167A (en) * | 2005-08-24 | 2007-02-28 | 边静 | Pulping method of non-wood-fiber enzymatic slurry |
| CN101230552A (en) * | 2008-01-23 | 2008-07-30 | 山东轻工业学院 | Technique for chemomechanical pulp-making of poplar wood |
| CN101302724A (en) * | 2008-06-23 | 2008-11-12 | 王新军 | Medicament agent for environment friendly pulping and environment friendly pulping process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939525A (en) * | 2017-04-28 | 2017-07-11 | 山东冠军纸业有限公司 | A kind of method that reduction APMP starches YI yellow index |
| CN111270551A (en) * | 2020-03-26 | 2020-06-12 | 陕西科技大学 | Mild pretreatment and disc grinding chemical treatment alkaline hydrogen peroxide mechanical pulping method |
| CN111270551B (en) * | 2020-03-26 | 2022-12-23 | 山东奥海纸业有限公司 | Mild pretreatment and disc-grinding chemical treatment alkaline hydrogen peroxide mechanical pulping method |
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| CN102154886B (en) | 2012-07-04 |
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Effective date of registration: 20160505 Address after: 272100 Friendship Road 1, Jining, Shandong, Yanzhou Patentee after: Shandong Taiyang Paper Industry Co., Ltd. Patentee after: YUNZHOU YONGYUE PAPER INDUSTRY CO., LTD. Address before: 272100 Friendship Road 1, Jining, Shandong, Yanzhou Patentee before: Shandong Taiyang Paper Industry Co., Ltd. |