CN103821022A - Needle pulp and broad leaf pulp pretreatment method with neutral cellulase - Google Patents
Needle pulp and broad leaf pulp pretreatment method with neutral cellulase Download PDFInfo
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Abstract
The invention belongs to the papermaking field, and particularly relates to a needle pulp and broad leaf pulp pretreatment method with neutral cellulase. The method comprises the following steps: adding repulping water into a groove body of a hydraulic repulper, wherein the volume of the pulp brushing water is 1/3-1/2 that of the groove body, the pH value of the repulping water is 5.5-8.5, and the water temperature is 30-50 DEG C; starting the hydraulic repulper, adding the neutral cellulase for papermaking beating into the hydraulic repulper, then putting mixed pulp of needle pulp and broad leaf pulp into the hydraulic repulper, and keeping the time of reaction between the neutral cellulase for the papermaking beating and the pulp in the hydraulic repulper to be 30-40 min, wherein 0.1-0.5 kg of the neutral cellulase for the papermaking beating is added into the pulp per ton; enabling the pretreated pulp to enter a front beating pool, sending into a fiberizer by a pulp pump and entering the next procedure. By pretreating the pulp with the neutral cellulase for the papermaking beating, ratios of long-fiber materials are reduced, material consumption is reduced, the product quality is improved, and energy conservation, consumption reduction and environment-friendly production are realized.
Description
Technical field
The invention belongs to field of papermaking, be specifically related to a kind of method of neutral cellulase preliminary treatment needle slurry and broad-leaved slurry.
Background technology
Pulp and paper industry is the huge industry of a kind of energy resource consumption, and its energy cost accounts for 20% left and right of total cost of production, and saving the energy has become the inexorable trend of paper industry.In process of production, beating energy consumption takies greatly cost, adopts biology enzyme to act on slurry processing and saves energy consumption in fine grinding process and become an important topic of pulping and paper-making.On probation in external existing research, the U.S. and Mexico have just tried out PergalaseA40 biology enzyme and have made pulp beating Energy Intensity Reduction 14%-20% in factory.
Because the chemical application of pulp and paper industry in method, the paper process of raw material mix, slurrying and bleaching is different with characteristic, make the Application Areas of biology enzyme very wide.At present, be penetrated into each field of pulping and paper-making industry in the research of pulping and paper-making different phase and application technology about cellulase, zytase, lipase, pectase, amylase and lignin degradation enzyme etc.Wherein with the research of cellulase be most widely used, all realize industrial applications at aspects such as wood chemistry slurry, the primary paper pulp of non-timber, change machine slurry, secondary stock and enzymatic beatings both at home and abroad.
Domestic enzyme preparation enterprise is owing to lacking good neutral cellulase bacterial classification and advanced zymotechnique, only have at present the external enzyme preparation giants of minority such as Novi of Denmark letter and Jie Neng section of the U.S. to have production bacterial classification and the zymotechnique of neutral cellulase, the monopolization of product cause the strange height of the market price not under.The corner on the market that not only can break external enzyme preparation company is produced in the papermaking making beating of my company with the research and development of neutral cellulase, avoid the restricted and people's of industrial enzyme preparation development situation, and greatly promotes the development of China's pulping and paper-making industry.
Along with social development and progress, the raising of people's living standard, consumer is also constantly improving the requirement of paper products.Paper for daily use desired strength is high, bulk is high, good water absorption; The high-grade printing paper such as A grade coated paper, art post paperboard requires to have higher tensile strength, deflection and bursting strength.But these physical indexs are in most of paper plants because the difference of existing equipment and technology condition restricts mutually, and if the raising of bulk is mainly to utilize heated-air drying to improve, its technology and technique are all very ripe, but energy resource consumption is very high; For the physical index such as tensile strength, deflection that improves paper will add the chemicals such as dry strength agent, wet strength agent, stiffener, can not adapt to society to energy-saving and cost-reducing, the requirement that environmental protection is produced.Improve and utilize papermaking making beating neutral cellulase to carry out preliminary treatment to needle slurry and broad-leaved slurry the beatability that needle slurry and broad-leaved are starched, experiment shows, through papermaking making beating, with after neutral cellulase preliminary treatment, tensile strength, the deflection etc. of slurry obviously increases, and tearability slightly reduces.Therefore, how to apply papermaking making beating neutral cellulase technology needle slurry and broad-leaved are starched and carried out preliminary treatment and solve above-mentioned series of problems, just become main purpose of the present invention.
Summary of the invention
A kind of method that the invention provides neutral cellulase preliminary treatment needle slurry and broad-leaved slurry, its object is, reduces the proportioning of long fibered raw material, cuts down the consumption of raw materials, and has improved product quality, realizes energy-saving and cost-reducing.
In order to realize foregoing invention object, the technical solution used in the present invention is:
The method of neutral cellulase preliminary treatment needle slurry of the present invention and broad-leaved slurry, following steps:
(1) to the pulping water that adds 1/3-1/2 volume in hydrabrusher cell body, the pH value of described pulping water is 5.5-8.5, and water temperature is 30-50 ℃;
(2) start hydrabrusher, in hydrabrusher, add papermaking making beating neutral cellulase, its consumption is the papermaking making beating neutral cellulase that adds 0.1-0.5kg in slurry per ton, then the mixed slurry of needle slurry and broad-leaved slurry is rendered in hydrabrusher, kept papermaking making beating in hydrabrusher, to react 30-40min with slurry with neutral cellulase;
(3) pretreated slurry enters and kowtows forebay, sends into fiberizer enter subsequent processing through stock pump.
In described step (1), the pH value of pulping water is 6.5-8.0, and water temperature is 40-45 ℃.
What described papermaking making beating was selected with neutral cellulase is chaetomium thermophilum cellulase, and active unit is 600u/ml.
Described papermaking making beating is liquid with neutral cellulase.
Described hydrabrusher be low dense, in any one in dense or high density hydraulic pulper.
In described step (2), needle slurry is 8-40:60-92 with the ratio of broad-leaved slurry.
In described step (2), needle slurry is 12:88 with the ratio of broad-leaved slurry.
Compared with prior art, the invention has the advantages that:
1, by adding papermaking making beating preliminary treatment to slurry with neutral cellulase, in the proportioning that guarantees to have reduced under the constant condition of the physical indexs such as paper strength long fibered raw material, reduced consumption of raw materials.
2, by adding papermaking making beating preliminary treatment to slurry with neutral cellulase, the physical indexs such as paper strength, bulk, water imbibition aspect paper for daily use, have been improved; Having improved the physical indexs such as paper fracture length, tensile strength, bursting strength aspect high-grade printing paper, meet consumers in general's user demand.
3, by adding papermaking making beating preliminary treatment to slurry with neutral cellulase, contribute to optimize refining process, reduce defibrination power, improve defibrination performance, improved product quality, realized and having saved energy and reduce the cost, environmental protection is produced.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope (SEM) photograph that does not add the sample slurry of papermaking making beating neutral cellulase;
Fig. 2 is the scanning electron microscope (SEM) photograph that adds the pretreated sample slurry of 0.3kg papermaking making beating neutral cellulase in slurry per ton.
The specific embodiment
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
The method of neutral cellulase preliminary treatment needle slurry and broad-leaved slurry, comprises the following steps:
(1) to the pulping water that adds 1/3 volume in middle density hydraulic pulper cell body, the pH value of described pulping water is 6.5-7.0, and water temperature is 40-45 ℃, and water temperature heats pulping water with drying cylinder tail vapour during lower than 40 ℃;
(2) density hydraulic pulper in startup, in middle density hydraulic pulper, add papermaking making beating chaetomium thermophilum cellulase, its consumption is the papermaking making beating chaetomium thermophilum cellulase that adds 0.2kg in slurry per ton, needle slurry and broad-leaved slurry are rendered in middle density hydraulic pulper in the ratio of 12:88, keep papermaking making beating chaetomium thermophilum cellulase and slurry in middle density hydraulic pulper the reaction time at 30min;
(3) pretreated slurry enters and kowtows forebay, sends into fiberizer enter subsequent processing through stock pump.
On domestic 1880mm toilet paper machine, manufacture paper with pulp with the pretreated slurry of chaetomium thermophilum cellulase through papermaking making beating, the page Main physical index of manufacturing paper with pulp out with pull an oar without papermaking by the pretreated page correction data of neutral cellulase in table 1:
Embodiment 2
The method of neutral cellulase preliminary treatment needle slurry and broad-leaved slurry, comprises the following steps:
(1) to the pulping water that adds 1/3 volume in middle density hydraulic pulper cell body, the pH value of described pulping water is 6.5-7.0, and water temperature is 40-45 ℃, and water temperature heats pulping water with drying cylinder tail vapour during lower than 40 ℃;
(2) density hydraulic pulper in startup, in middle density hydraulic pulper, add papermaking making beating chaetomium thermophilum cellulase, its consumption is the papermaking making beating chaetomium thermophilum cellulase that adds 0.1kg in slurry per ton, needle slurry and broad-leaved slurry are rendered in middle density hydraulic pulper in the ratio of 12:88, keep papermaking making beating chaetomium thermophilum cellulase and slurry in middle density hydraulic pulper the reaction time at 35min;
(3) pretreated slurry enters and kowtows forebay, sends into fiberizer enter subsequent processing through stock pump.
On domestic 2640mm fourdrinier wire wire multi-cylinder paper machine, manufacture paper with pulp with the pretreated slurry of chaetomium thermophilum cellulase through papermaking making beating.
Embodiment 3
The method of neutral cellulase preliminary treatment needle slurry and broad-leaved slurry, comprises the following steps:
(1) to the pulping water that adds 1/3 volume in low density hydraulic pulper cell body, the pH value of described pulping water is 6.5-7.0, and water temperature is 40-45 ℃, and water temperature heats pulping water with drying cylinder tail vapour during lower than 40 ℃;
(2) start low density hydraulic pulper, in low density hydraulic pulper, add papermaking making beating chaetomium thermophilum cellulase, its consumption is the papermaking making beating chaetomium thermophilum cellulase that adds 0.3kg in slurry per ton, needle slurry and broad-leaved slurry are rendered in middle density hydraulic pulper in the ratio of 12:88, keep papermaking making beating chaetomium thermophilum cellulase and slurry in low density hydraulic pulper the reaction time at 35min;
(3) pretreated slurry enters and kowtows forebay, sends into fiberizer enter subsequent processing through stock pump.
On domestic 2640mm fourdrinier wire wire multi-cylinder paper machine, manufacture paper with pulp with the pretreated slurry of chaetomium thermophilum cellulase through papermaking making beating.
Embodiment 4
The method of neutral cellulase preliminary treatment needle slurry and broad-leaved slurry, comprises the following steps:
(1) to the pulping water that adds 1/3 volume in middle density hydraulic pulper cell body, the pH value of described pulping water is 6.5-7.0, and water temperature is 40-45 ℃, and water temperature heats pulping water with drying cylinder tail vapour during lower than 40 ℃;
(2) density hydraulic pulper in startup, in middle density hydraulic pulper, add papermaking making beating chaetomium thermophilum cellulase, its consumption is the papermaking making beating chaetomium thermophilum cellulase that adds 0.5kg in slurry per ton, needle slurry and broad-leaved slurry are rendered in middle density hydraulic pulper in the ratio of 12:88, keep papermaking making beating chaetomium thermophilum cellulase and slurry in middle density hydraulic pulper the reaction time at 40min;
(3) pretreated slurry enters and kowtows forebay, sends into fiberizer enter subsequent processing through stock pump.
On domestic 2640mm fourdrinier wire wire multi-cylinder paper machine, manufacture paper with pulp with the pretreated slurry of chaetomium thermophilum cellulase through papermaking making beating.
The Main physical performance indications of the paper that the slurry after embodiment 1-4 different amounts chaetomium thermophilum cellulase preliminary treatment needle slurry and broad-leaved are starched is manufactured paper with pulp out are in table 2:
Embodiment 5
The method of neutral cellulase preliminary treatment needle slurry and broad-leaved slurry, comprises the following steps:
(1) to the pulping water that adds 1/2 volume in middle density hydraulic pulper cell body, the pH value of described pulping water is 7.0-7.5, and water temperature is 40-45 ℃, and pulping water temperature heats pulping water with drying cylinder tail vapour during lower than 40 ℃;
(2) density hydraulic pulper in startup, in middle density hydraulic pulper, add papermaking making beating chaetomium thermophilum cellulase, its consumption is the papermaking making beating chaetomium thermophilum cellulase that adds 0.3kg in slurry per ton, needle slurry and broad-leaved slurry are rendered in middle density hydraulic pulper in the ratio of 8:92, keep papermaking making beating chaetomium thermophilum cellulase and slurry in middle density hydraulic pulper the reaction time at 35min;
(3) pretreated slurry enters and kowtows forebay, sends into fiberizer enter subsequent processing through stock pump.
Embodiment 6
The method of neutral cellulase preliminary treatment needle slurry and broad-leaved slurry, comprises the following steps:
(1) to the pulping water that adds 1/3 volume in low density hydraulic pulper cell body, the pH value of described pulping water is 7.5-8.0, and water temperature is 40-45 ℃, and pulping water temperature heats pulping water with drying cylinder tail vapour during lower than 40 ℃;
(2) start low density hydraulic pulper, in low density hydraulic pulper, add papermaking making beating chaetomium thermophilum cellulase, its consumption is the papermaking making beating chaetomium thermophilum cellulase that adds 0.4kg in slurry per ton, needle slurry and broad-leaved slurry are rendered in low density hydraulic pulper in the ratio of 40:60, keep papermaking making beating chaetomium thermophilum cellulase and slurry in low density hydraulic pulper the reaction time at 40min;
(3) pretreated slurry enters and kowtows forebay, sends into fiberizer enter subsequent processing through stock pump.
Embodiment 7
The method of neutral cellulase preliminary treatment needle slurry and broad-leaved slurry, comprises the following steps:
(1) to the pulping water that adds 1/3 volume in middle density hydraulic pulper cell body, the pH value of described pulping water is 6.5-7.0, and water temperature is 45-50 ℃, and pulping water temperature heats pulping water with drying cylinder tail vapour during lower than 45 ℃;
(2) density hydraulic pulper in startup, in middle density hydraulic pulper, add papermaking making beating chaetomium thermophilum cellulase, its consumption is the papermaking making beating chaetomium thermophilum cellulase that adds 0.5kg in slurry per ton, needle slurry and broad-leaved slurry are rendered in middle density hydraulic pulper in the ratio of 20:80, keep papermaking making beating chaetomium thermophilum cellulase and slurry in middle density hydraulic pulper the reaction time at 40min;
(3) pretreated slurry enters and kowtows forebay, sends into fiberizer enter subsequent processing through stock pump.
Table 1
As can be seen from Table 1, use papermaking making beating neutral cellulase to carry out after preliminary treatment slurry, the long stapled consumption of needlebush is down to 12% by 30%, and refining energy consumption has reduced by 9.19%; The rate of batching brings up to 84% by 82.2%, and in the unit interval, output can improve 2.15%; Zeeil tensile strength Z mean value improves 3.75% in length and breadth; Page thickness improves 5.62%; Laterally water imbibition improves 4.35%, can reach a conclusion thus: through papermaking pull an oar the toiler roll body paper page tensile strength enhancing of manufacturing paper with pulp out with the pretreated slurry of neutral cellulase, bulking intensity and water imbibition raising.
Table 2
Found out by table 2, along with the increase of neutral cellulase consumption for papermaking making beating, the tensile strength of paper, fracture length, bursting strength are ascendant trend gradually; Paper percentage elongation, tearability are and reduce gradually trend.Because papermaking making beating makes slurry wire-dividing broom purification better with neutral cellulase, and then produce better adhesion, improved the physical index such as tensile strength, fracture length, bursting strength of paper, but along with the fibrillating of fiber, the tearability of paper is reduced.Conclusion: in the production of different paper kinds, reasonably add papermaking making beating neutral cellulase according to the physical index that becomes paper, completely can realize and improving the quality of products, the object reducing cost consumption.
As seen from Figure 1, fiber is complete, more stiff, and without obviously fracture, but edge contains tiny component and fragment; As seen from Figure 2, compared to Figure 1, after pulling an oar with the pretreated slurry sample of neutral cellulase through papermaking making beating, tiny component obviously reduces, fiber surface depression, soft, lax, fiber itself is not subject to undue cut-out, but has increased the specific area of fiber, has promoted the combination of fiber.
Claims (7)
1. a method for neutral cellulase preliminary treatment needle slurry and broad-leaved slurry, is characterized in that following steps:
(1) to the pulping water that adds 1/3-1/2 volume in hydrabrusher cell body, the pH value of described pulping water is 5.5-8.5, and water temperature is 30-50 ℃;
(2) start hydrabrusher, in hydrabrusher, add papermaking making beating neutral cellulase, its consumption is the papermaking making beating neutral cellulase that adds 0.1-0.5kg in slurry per ton, then needle slurry and the mixed slurry of broad-leaved slurry are rendered in hydrabrusher, kept papermaking making beating in hydrabrusher, to react 30-40min with slurry with neutral cellulase;
(3) pretreated slurry enters and kowtows forebay, sends into fiberizer enter subsequent processing through stock pump.
2. the method for neutral cellulase preliminary treatment needle slurry according to claim 1 and broad-leaved slurry, is characterized in that, in described step (1), the pH value of pulping water is 6.5-8.0, and water temperature is 40-45 ℃.
3. the method for neutral cellulase preliminary treatment needle slurry according to claim 1 and broad-leaved slurry, is characterized in that, what described papermaking making beating was selected with neutral cellulase is chaetomium thermophilum cellulase, and active unit is 600u/ml.
4. the method for neutral cellulase preliminary treatment needle slurry according to claim 1 and broad-leaved slurry, is characterized in that, described papermaking making beating is liquid with neutral cellulase.
5. the method that neutral cellulase preliminary treatment needle according to claim 1 slurry and broad-leaved are starched, is characterized in that, described hydrabrusher be low dense, in any one in dense or high density hydraulic pulper.
6. the method for neutral cellulase preliminary treatment needle slurry according to claim 1 and broad-leaved slurry, is characterized in that, in described step (2), needle slurry is 8-40:60-92 with the ratio of broad-leaved slurry.
7. according to the method for the neutral cellulase preliminary treatment needle slurry described in claim 1 or 6 and broad-leaved slurry, it is characterized in that, in described step (2), needle slurry is 12:88 with the ratio of broad-leaved slurry.
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| CN107653726A (en) * | 2017-10-31 | 2018-02-02 | 福建希源纸业有限公司 | A kind of enzymatic beating process |
| CN107780277A (en) * | 2017-11-15 | 2018-03-09 | 山东尤特尔生物科技有限公司 | Utilize neutral cellulase and the pulping process of neutral xylans ferment treatment secondary stock |
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| CN109024038A (en) * | 2018-08-06 | 2018-12-18 | 上海尤特尔生化有限公司 | The modification pulping process and modified slurry and papermaking process of secondary stock |
| CN110172852A (en) * | 2019-05-23 | 2019-08-27 | 邱振权 | The preparation method of papermaking plant fiber processing |
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| CN105155324A (en) * | 2015-09-23 | 2015-12-16 | 山东尤特尔生物科技有限公司 | Application of chaetomium thermophilum cellulase in pulping and papermaking process |
| CN107881828A (en) * | 2017-10-17 | 2018-04-06 | 福建希源纸业有限公司 | A kind of methods of beating using biology enzyme |
| CN107653726A (en) * | 2017-10-31 | 2018-02-02 | 福建希源纸业有限公司 | A kind of enzymatic beating process |
| CN107780277B (en) * | 2017-11-15 | 2020-04-21 | 山东尤特尔生物科技有限公司 | Pulping method for treating waste paper pulp by using neutral cellulase and neutral xylanase |
| CN107780277A (en) * | 2017-11-15 | 2018-03-09 | 山东尤特尔生物科技有限公司 | Utilize neutral cellulase and the pulping process of neutral xylans ferment treatment secondary stock |
| CN108753492A (en) * | 2018-07-04 | 2018-11-06 | 湖南尤特尔生化有限公司 | A kind of application of mesophilic protein in preparing detergent |
| CN109024038A (en) * | 2018-08-06 | 2018-12-18 | 上海尤特尔生化有限公司 | The modification pulping process and modified slurry and papermaking process of secondary stock |
| CN110172852A (en) * | 2019-05-23 | 2019-08-27 | 邱振权 | The preparation method of papermaking plant fiber processing |
| CN110172852B (en) * | 2019-05-23 | 2021-08-06 | 苏州赛维科环保技术服务有限公司 | Treatment method of plant fiber for papermaking |
| CN111270561A (en) * | 2020-02-24 | 2020-06-12 | 亚太森博（山东）浆纸有限公司 | High-whiteness yellowing-resistant coated white cardboard and preparation method thereof |
| CN113846516A (en) * | 2021-10-13 | 2021-12-28 | 亚太森博（山东）浆纸有限公司 | Double-faced log-color environment-friendly liquid packaging paper and preparation method thereof |
| CN113846516B (en) * | 2021-10-13 | 2023-01-24 | 亚太森博（山东）浆纸有限公司 | Double-faced log-color environment-friendly liquid packaging paper and preparation method thereof |
| CN114263067A (en) * | 2021-12-29 | 2022-04-01 | 福建恒安集团有限公司 | Preparation process of raw paper material of high-water-absorption hand towel paper |
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