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Method for primary pulp pulping of paper making

A technology for pulp and wood pulp, applied in the field of household paper, can solve the problems such as difficulty in improving the beating degree of softwood pulp and insignificant improvement effect, and achieve the effects of improving water drainage, reducing energy consumption and reducing power consumption.

Inactive Publication Date: 2018-05-15
ANHUI BILUN DOMESTIC PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although hardwood pulp is mostly used as raw material for toilet paper, a few products also add some softwood pulp in order to improve the quality. Because the beating degree of softwood pulp is difficult to improve, although the existing method uses biological enzymes to assist beating, the effect is improved. not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for beating raw pulp for papermaking, the raw pulp raw material is mixed wood pulp obtained by mixing 80% hardwood pulp and 20% softwood pulp, and the beating method comprises the following steps:

[0019] (1) Disintegrate the mixed wood pulp with a hydraulic pulper, and then stir it at a speed of 2000r / min for 40min to obtain the disintegrated pulp;

[0020] (2) Add hemicellulase to the decomposed slurry, heat the slurry to 30°C, then adjust the pH of the slurry to 5.5, treat for 5 hours, and then add the enzymatically hydrolyzed slurry to the vacuum reaction Treat in the kettle for 10 minutes, the treatment temperature is 90°C, then take it out, and cool it down to room temperature naturally to obtain the pretreated slurry;

[0021] (3) Add sodium alginate-modified attapulgite with a mass of 0.15% to the pretreatment slurry obtained in step (2), adjust the concentration of the pretreatment slurry to 10%, and then beat it through a PFI refiner for 2000 change...

Embodiment 2

[0030] A method for beating raw pulp for papermaking, the raw pulp raw material is mixed wood pulp obtained by mixing 80% hardwood pulp and 20% softwood pulp, and the beating method comprises the following steps:

[0031] (1) Disintegrate the mixed wood pulp with a hydraulic pulper, and then stir it at a speed of 2500r / min for 40min to obtain the disintegrated pulp;

[0032] (2) Add hemicellulase to the decomposed slurry, heat the slurry to 30-35°C, then adjust the pH of the slurry to 6.0, treat for 8 hours, and then add the enzymatically hydrolyzed slurry to Treat in a vacuum reactor for 15 minutes at a temperature of 100°C, then take it out, and cool it down to room temperature naturally to obtain a pretreated slurry;

[0033] (3) Add 0.3% of the mass of sodium alginate modified attapulgite to the pretreatment slurry obtained in step (2), adjust the concentration of the pretreatment slurry to 10%, and then beat it through a PFI refiner for 2400 change.

[0034] Further, th...

Embodiment 3

[0042] A method for beating raw pulp for papermaking. The raw pulp raw material is mixed wood pulp obtained by mixing 80% hardwood pulp and 20% softwood pulp. The beating method comprises the following steps:

[0043] (1) Decompose the mixed wood pulp with a hydraulic pulper, and then stir it at a speed of 2200r / min for 40min to obtain the decomposed pulp;

[0044] (2) Add hemicellulase to the decomposed slurry, heat the slurry to 33°C, then adjust the pH of the slurry to 5.8, treat for 6 hours, and then add the enzymatically hydrolyzed slurry to the vacuum reaction Treat in the kettle for 10-15min at a temperature of 90-100°C, then take it out and cool it down to room temperature naturally to obtain the pretreated slurry;

[0045] (3) Add 0.2% of the mass of sodium alginate modified attapulgite to the pretreatment slurry obtained in step (2), adjust the concentration of the pretreatment slurry to 10%, and then beat it through a PFI refiner for 2200 change.

[0046] Further,...

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Abstract

The invention discloses a method for primary pulp pulping of paper making, and relates to the technical field of paper for daily use. The method includes the following steps that (1) mixed wood pulp is dissolved with a hydrapulper; (2) hemicellulase is added into the dissolved slurry, and a mixture of the hemicellulase and the dissolved slurry is added to a vacuum reaction kettle to process; (3) sodium alginate modified attapulgite is added into the pre-processed slurry, then 2000-2400r is conducted by a PFT pulping machine; according to the method for primary pulp pulping of paper making, byadoping the hemicellulase, enzymolysis of pulp is conducted, then the sodium alginate modified attapulgite is added to the pulp, and PFI grinding is conducted, not only the energy consumption can be reduced, the yield is increased, but also fiber can be modified.

Description

technical field [0001] The invention belongs to the technical field of household paper, and in particular relates to a method for beating raw pulp for papermaking. Background technique [0002] At present, there are many types of household paper on the market. Due to the different models, raw materials, and process technologies used by various manufacturers, the quality of the products produced is uneven. Household paper is a necessary product for daily life, such as roll paper , napkins and facial tissues, etc. my country is a big country in paper production, consumption and import. With the rapid development of the household paper industry and the growing demand of consumers for high-quality household paper, ordinary household paper has been unable to meet the needs of consumers. In order to reduce the production cost of the factory and improve the production efficiency of the factory, more and more paper mills use biological enzymes to pretreat the pulp before beating, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/02D21H15/10D21H17/00D21H17/69D21H17/68D21H17/14
Inventor 许亦南
Owner ANHUI BILUN DOMESTIC PAPER CO LTD
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