CN1546787A - Pulping method using vegetation raw material and xylanase - Google Patents
Pulping method using vegetation raw material and xylanase Download PDFInfo
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- CN1546787A CN1546787A CNA2003101055658A CN200310105565A CN1546787A CN 1546787 A CN1546787 A CN 1546787A CN A2003101055658 A CNA2003101055658 A CN A2003101055658A CN 200310105565 A CN200310105565 A CN 200310105565A CN 1546787 A CN1546787 A CN 1546787A
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Abstract
The invention is a pulping method by using plant material xylanase, which belongs to pulp producing technology field in paper making industry. The invention uses grass or woody plants as pulping material, the method includes physical process, boiling and cleaning, and bleaching process to pulping material, the character lies in: the grass and woody material are crushed and processed with boiling, cleaning, then adds in sylanase with proportion of 40-50g/T into the raw pulp of pulp cleaning process or high density tower, maintains the pulp temperature is 40-50 degrees. Then the invention bleaches the paper pulp with bleaching solution. The invention eliminates the affection of chemical process to pulp, improves the structure of the paper pulp, and reduces the quantity of bleaching solution. The organic chloride in waste water is decreased.
Description
Technical field
The invention belongs to the preparing technical field of paper pulp in the paper technology, relating in particular to a kind of is raw material with draft or xylophyta, uses the method for zytase in the pulping process.
Background technology
The paper-making pulping raw material that China uses at present mainly is herbaceous plant and xylophyta, as wheat straw, timber etc., pulping process in the paper industry adopts chemical pulping method more, both sneaked into boiling vegetation pulping raw material with chemicals, the fiber of raw material is separated easily, the boiling purpose is to want chemicals and raw material such as wooden to produce chemical reaction, to get rid of lignin, usually makes the materials of paper pulp to stay fiber.The most frequently used chemical pulping method is soda pulping process and sulfate pulp-making at present, and the paper pulp of making could use as the raw material that online is manufactured paper with pulp through after bleaching.
Bleaching chemical commonly used is a Chlorine Bleach, floats agent in the bleaching liquor, the residual lignin reaction in chlorine and hypochlorite ion and the cellulose fibre and decolouring.But because pulping raw material is in the process of boiling, xylan part in the cooking liquor is deposited on the cellulose fibre again, hindered the residual lignin reaction of floating in agent and the cellulose fibre, after floating necessary elder generation of agent and xylan partial reaction, the residual lignin reaction on ability and the xylan internal fiber.This not only can increase the consumption that floats agent, and prolongs bleaching time, in the waste water float agent and organic chloride content increases, strengthened the load of wastewater treatment.On the other hand, float agent and paper pulp fiber Long contact time, also can produce certain destruction paper pulp fiber.
On June 4th, 2003, disclosed Chinese patent application 02135987.3 provided a kind of method of enzymatic straw material pulping, this method comprises mechanical pretreatment section, enzyme processing section and chemical pulping or chemical-mechanical pulping section, it is characterized in that the described mechanical pretreatment stage can adopt fiberizer to carry out, water volume is 15: 1～25: 1 with the ratio of over dry raw material, and grinding clearance is 0.2～4mm; The processing stage of described enzyme, used enzyme liquid is the hemicellulase crude enzyme liquid, perhaps is the mixed enzyme solution of hemicellulase crude enzyme liquid and lignin peroxidase crude enzyme liquid.This invention is to make pulping raw material with careless class, is dispersed into filament through defibrination, adds enzyme liquid then and handle in digester.The purpose that adds enzyme is to reduce the consumption of boiling chemicals, improves pulp quality.
Summary of the invention
The object of the present invention is to provide the method for a kind of vegetation raw material zytase slurrying, solved that to float the agent pulp treatment time long, float the big shortcoming of agent consumption, and improved pulp quality.
The technical solution adopted in the present invention is as follows:
The method of a kind of vegetation raw material zytase slurrying, with draft or xylophyta as pulping raw material, physical treatment, boiling and the pulp washing and the bleachery that comprise pulping raw material, it is characterized in that the vegetation pulping raw material is after carrying out boiling, pulp washing behind the mechanical cutting, additional proportion is the zytase of 40～50g/T slurry in the thick slurry in pulp washing operation or high dense tower, keeping slurry temperature is 40～50 ℃, with bleaching liquor paper pulp is bleached then.
Described digesting technoloy is to add chemicals in the pulping raw material to carry out chemical pulping or chemical-mechanical pulping, as soda pulping process and sulfate pulp-making.
The zytase that joins in the slurries is that mass concentration is 2.5% zytase solution.
Slurry concentration 〉=6% of thick slurry in the high dense tower.
Zytase is a kind of active material, the sugared key hydrolysis of β-1,4 in its energy catalysis xylan backbone, and the key reaction product is xylobiose, xylotriose and wooden poly oligosaccharide.Because the xylan of cellulose fibre surface deposition and fibrous inside is decomposed, fibre structure is loose, in the paper pulp fiber remaining lignin in bleaching process easily and delignification's chemicals react and remove, float the reaction speed of agent and residual lignin and accelerate, thereby can in the equal available machine time, improve paper output.Owing to the degradation of zytase to lignin, the corresponding reduction floats the consumption of agent in bleaching process simultaneously, thereby organic chloride and COD discharge capacity in the waste water are reduced, and reduces pollutional load.
Beneficial effect of the present invention is; this pulping process is by the adding of zytase; eliminated xylan to the chemically treated influence of paper pulp fiber; and improve the structure of paper pulp fiber; reduce and float the consumption of agent, the also corresponding reduction of organic chloride has improved pulp processing speed and slurrying output in the sewage; while protection sheet pulp fibres, the quality of raising pulping.The method of this zytase slurrying can be widely used in chemical pulping or the chemical-mechanical pulping of making pulping raw material with draft or xylophyta.
The specific embodiment
Embodiment 1 is cut into the long blade of 3～5cm with the paper pulp raw material wheat straw, and adding concentration is the alkali lye of 110～150g/L, carries out boiling, and the quality requirement of cooking process is: boiling hardness 13～16k, steam back residual alkali concn 9～12g/L (recovery alkali).The thick slurry of process boiling enters wash engine and carries out pulp washing.It is 2.5% working solution that zytase is diluted to mass concentration, pressing the 40g/L oven dry stock calculates, wash and starch lasting the adding in the slurries in the pulp grinder at Huang, and send into storage by the spiral propeller mixing and starch in the tower, the slurry position is controlled at more than 70%, to reach the time of staying of zytase, give full play to the catalytic degradation effect of zytase.Slurries after zytase is handled are sent into rinsing process, and interpolation is floated agent and bleached.
Comparative examples prepares straw pulp by the pulping process of embodiment 1, but preparation process is not added the control experiment of zytase as embodiment 1.The experimental data contrast that in March, 2003 to 2003, year drew between trial run period June sees Table the available machine time in July, 1,2003 and produces the contrast of slurry data and sees Table two.
| Experiment method | Chlorine Kg | Effective chlorine Kg | Weight in wet base g | Beating degree ° SR | Whiteness % | Waste water COD |
| Embodiment 1 | ??43.19 | ??31.87 | ??2.17 | ??31.75 | ??80.5 | ??1790 |
| Comparative examples | ??50.56 | ??39.69 | ??1.84 | ??30.44 | ??80.2 | ??1970 |
Table one slurry per ton is with floating agent and paper pulp, the waste water experimental data table of comparisons
| Experiment method | Date | Per day available machine time h | Average daily production T | Slurry through amount T per hour |
| Embodiment 1 | ???03.7.1-03.7.7 | ???18.32 | ?106.97 | ?5.84 |
| Comparative examples | ???03.7.9-03.7.21 | ???21.14 | ?106.21 | ?5.02 |
Table two available machine time and the paste producing amount table of comparisons
Embodiment 2 is cut into chips with paper pulp raw material timber with slicer, and adding concentration is the alkali lye of 110～150g/L, carries out boiling in rotary spherical digester, and the quality requirement of cooking process is: boiling hardness 13～16k, steam back residual alkali concn 9～12g/L (recovery alkali).The thick slurry of process boiling enters wash engine and carries out pulp washing.It is 2.5% working solution that zytase is diluted to mass concentration, pressing the 40g/L oven dry stock calculates, continue to add in the slurries at the dense tower of height place, and send into the black wash storage by the spiral propeller mixing and starch in the tower, the slurry position is controlled at more than 70%, to reach the time of staying of zytase, give full play to the catalytic degradation effect of zytase.Slurries after zytase is handled are sent into rinsing process, and interpolation is floated agent and bleached.
Embodiment 3 is cut into the long blade of 3～5cm with the paper pulp raw material wheat straw, and adding concentration is the alkali lye of 110～150g/L, carries out boiling, and the thick slurry of process boiling enters wash engine and carries out pulp washing.It is 2.5% working solution that zytase is diluted to mass concentration, pressing the 50g/L oven dry stock calculates, behind pulp washing, continue to add in the slurries, and send into storage by the spiral propeller mixing and starch in the tower, the slurry position is controlled at more than 70%, to reach the time of staying of zytase, give full play to the catalytic degradation effect of zytase.Slurries after zytase is handled are sent into rinsing process, and interpolation is floated agent and bleached.
Claims (4)
1, the method for a kind of vegetation raw material zytase slurrying, with draft or xylophyta as pulping raw material, physical treatment, boiling and the pulp washing and the bleachery that comprise pulping raw material, it is characterized in that the vegetation pulping raw material is after carrying out boiling, pulp washing behind the mechanical cutting, additional proportion is the zytase of 40～50g/T slurry in the thick slurry in pulp washing operation or high dense tower, keeping slurry temperature is 40～50 ℃, with bleaching liquor paper pulp is bleached then.
2, the method for vegetation raw material zytase according to claim 1 slurrying is characterized in that described digesting technoloy is to add chemicals in the pulping raw material to carry out chemical pulping or chemical-mechanical pulping.
3, the method for vegetation raw material zytase according to claim 1 slurrying, the zytase that it is characterized in that joining in the slurries is that mass concentration is 2.5% zytase solution.
4, the method for vegetation raw material zytase according to claim 1 slurrying is characterized in that thick slurry concentration 〉=6% of starching in the high dense tower.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310105565 CN1271279C (en) | 2003-12-01 | 2003-12-01 | Pulping method using vegetation raw material and xylanase |
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| CN 200310105565 CN1271279C (en) | 2003-12-01 | 2003-12-01 | Pulping method using vegetation raw material and xylanase |
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| CN1546787A true CN1546787A (en) | 2004-11-17 |
| CN1271279C CN1271279C (en) | 2006-08-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978304A (en) * | 2018-09-02 | 2018-12-11 | 大连圣多教育咨询有限公司 | A kind of paper-making pulping process |
| CN109024034A (en) * | 2018-09-02 | 2018-12-18 | 大连圣多教育咨询有限公司 | A kind of paper-making pulping digestant |
| CN109183484A (en) * | 2018-09-02 | 2019-01-11 | 大连圣多教育咨询有限公司 | A kind of technique that slurrying is carried out as raw material using gramineae plant |
| CN112359630A (en) * | 2020-09-29 | 2021-02-12 | 广西金桂浆纸业有限公司 | Wood chip treatment method, wood chip treatment system and chemi-mechanical pulp product |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI420010B (en) * | 2010-09-15 | 2013-12-21 | Yuen Foong Yu Paper Mfg Co Ltd | Method for preparing non-wood fiber pulp |
-
2003
- 2003-12-01 CN CN 200310105565 patent/CN1271279C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978304A (en) * | 2018-09-02 | 2018-12-11 | 大连圣多教育咨询有限公司 | A kind of paper-making pulping process |
| CN109024034A (en) * | 2018-09-02 | 2018-12-18 | 大连圣多教育咨询有限公司 | A kind of paper-making pulping digestant |
| CN109183484A (en) * | 2018-09-02 | 2019-01-11 | 大连圣多教育咨询有限公司 | A kind of technique that slurrying is carried out as raw material using gramineae plant |
| CN109183484B (en) * | 2018-09-02 | 2021-05-28 | 广西宏瑞泰纸浆有限责任公司 | Pulping process using gramineous plants as raw materials |
| CN112359630A (en) * | 2020-09-29 | 2021-02-12 | 广西金桂浆纸业有限公司 | Wood chip treatment method, wood chip treatment system and chemi-mechanical pulp product |
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| CN1271279C (en) | 2006-08-23 |
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