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Preparation method of high-strength bio-chemi-mechanical pulp

A biochemical machine, high-strength technology, used in chemical/chemomechanical pulp, cellulose treatment with microorganisms/enzymes, pulp bleaching, etc., can solve the limited effect of adjusting the refining process, the increase in the pollution load of pulping wastewater, Increase the working load of the refiner to achieve the effect of reducing the loss of raw material fibers, improving product quality, and reducing the energy consumption of refining

Pending Publication Date: 2021-11-05
LONGYOU COUNTY JINLONG PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, the adaptability to raw materials is poor, especially it is not suitable to use denser raw materials. Therefore, it is difficult for denser raw materials to be soaked and softened by biological enzyme pre-impregnation liquid in a short period of time. Increase the work load of the refiner and increase the power consumption of the refiner. On the other hand, the probability of the fiber being forcibly torn increases, and more fine fibers are produced, which affects the quality of the pulp.
At the same time, it also causes an increase in the pollution load of pulping waste liquid and a decrease in the pulping yield; secondly, the problem of fiber bundles is a chronic problem in bio-enzyme pulping. The current solution to this problem is mainly to adjust the refining process and increase the The amount of bio-enzyme impregnated medicine, but the effect of adjusting the refining process is relatively limited, and the negative effect of increasing the amount of bio-enzyme impregnated medicine is also as mentioned above

Method used

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  • Preparation method of high-strength bio-chemi-mechanical pulp
  • Preparation method of high-strength bio-chemi-mechanical pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Composite softener, raw material components include, by weight, 43 parts of sodium alkylsulfonate, 16 parts of fatty alcohol polyoxyethylene ether, 15 parts of Pingpingjia 0-20, 12 parts of oleic acid triethanolamine soap, penetrating agent BS 6 parts, 3 parts of dioctyl sulfosuccinate sodium salt, 1 part of sulfamic acid, 0.3 parts of sodium hexametaphosphate, 36 parts of water.

[0038] Preparation of softener:

[0039] Heat water to 60°C, add Pingpingjia 0-20 and fatty alcohol polyoxyethylene ether, heat to 75°C, stir for 2 hours; add sodium alkylsulfonate, stir for 50 minutes; add penetrant BS, dioctyl sulfosuccinate Sodium salt, stir for 30 minutes; cool to 30°C, add oleic acid triethanolamine soap, sodium hexametaphosphate, sulfamic acid, and stir for 1.5 hours to obtain softener.

[0040] Preparation of modified starch:

[0041] Adjust the pH value of the starch to 2.0 with 10% hydrochloric acid, acidify it at 53°C, and then disperse it in hot water at 60°C disso...

Embodiment 2

[0050] Composite softener and its preparation are the same as in Example 1.

[0051] The preparation of modified starch is the same as in Example 1.

[0052] The composite biological enzyme preparation comprises, in parts by weight, 42 parts of deionized water, 40 parts of laccase, 25 parts of cellulase, 17 parts of pectinase, 9 parts of citric acid and 2 parts of modified starch.

[0053] The preparation of high-strength biochemical pulp is the same as that in Example 1.

Embodiment 3

[0055] Composite softener and its preparation are the same as in Example 1.

[0056] The preparation of modified starch is the same as in Example 1.

[0057] The difference between the complex biological enzyme preparation and Example 1 is that it also includes 2 parts by weight of 3'-methoxy-5'-hydroxyisoflavone-7-O-β-D-glucose.

[0058] The preparation of high-strength biochemical pulp is the same as that in Example 1.

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Abstract

The invention discloses a preparation method of high-strength bio-chemi-mechanical pulp, and relates to the technical field of pulping and papermaking. The preparation method comprises the following steps: S1, cutting, screening and washing of raw materials; S2, softening treatment: fully mixing the materials, water, a compound bio-enzyme preparation and a compound softener, and conducting reacting at 45-55 DEG C for 2-3 hours; S3, mechanical pulping and filament separation treatment: performing rubbing and filament separation; S4, bleaching treatment: adjusting the mass percentage concentration of obtained pulp to be 12-16% and the pH value of the pulp to be 5.5-6.5, adding the compound bio-enzyme preparation and hydrogen peroxide, and conducting reacting at 45-55 DEG C for 3-5 hours; and S5, cleaning treatment: carrying out water-washing pulping and dust removal to complete a pulping process. The preparation method of the bio-chemi-mechanical pulp provided by the invention is simple and effective to operate, strong in pertinence, strong in operability, free of high-temperature cooking in a degradation process, free of addition of a harmful substance caustic soda, free of generation of black liquor, low in energy consumption, high in pulp yield and excellent in physical strength of the machine pulp.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a preparation method of high-strength biochemical mechanical pulp. Background technique [0002] Papermaking is divided into two basic processes: pulping and papermaking. Papermaking is the process of combining pulp fibers suspended in water into paper sheets that meet various requirements. Biological pulping is one of the technological directions of detergent pulp. The pulp prepared by biological pulping has long fiber, high pulping rate, strong dismantling resistance, and the cost per ton of pulp is much lower than that of chemical pulp and mechanical pulp. However, due to biological bacteria The conditions of seed cultivation, selection and pulping process are too high, there are many problems such as large production fluctuations, uneven material handling, long processing time, and low production efficiency. At present, it is difficult to industria...

Claims

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Application Information

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IPC IPC(8): D21B1/02D21C5/00D21C9/10D21C9/16C08B31/04D21H11/02
CPCD21B1/02D21B1/021D21C5/005D21C9/163D21C9/1063C08B31/04D21H11/02Y02W30/64
Inventor 陈欢欢叶剑施德新陈敏徐文夏琦
Owner LONGYOU COUNTY JINLONG PAPER