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Alkaline hydrogen peroxide mechanical pulping method based on mild pretreatment and disc milling chemical treatment

A chemical treatment, hydrogen peroxide technology, applied in chemical/chemical mechanical pulp, water/steam pretreatment, pretreatment with alkaline compounds, etc., can solve the problems of poor pulp quality and poor stability, achieve low production cost, The effect of fine process, improved bulk and optical performance

Active Publication Date: 2020-06-12
山东奥海纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of alkaline hydrogen peroxide mechanical pulping method of mild pretreatment and disc grinding chemical treatment, which solves the problems existing in the prior art Poor stability of pulping method and poor pulp quality

Method used

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  • Alkaline hydrogen peroxide mechanical pulping method based on mild pretreatment and disc milling chemical treatment

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Effect test

Embodiment 1

[0042] The alkaline hydrogen peroxide mechanical pulping method of the present invention's mild pretreatment and disc grinding chemical treatment, flow is specifically implemented according to the following steps:

[0043] Step 1. Pretreat the hardwood log chips with biological enzymes, then wash them, pre-steam the washed chips at normal pressure, and finally decompose the steamed wood chips in the first stage of double-screw extrusion, and remove the The air, excess moisture and resin are squeezed out, and the wood chips are crushed;

[0044] The biological enzyme selected in step 1 is the sum of laccase, HBT mediator, and pectinase, that is, first add the HBT mediator with a mass fraction of 0.5%, then add 10IU / g of laccase, and finally add 8IU / g of pectinase Gluease, pretreatment time 110min, pH=4, temperature 50°C, pretreatment concentration 10% by mass.

[0045] The temperature of the water during washing in step 1 is 60° C., the washing time is 15 minutes, the temperat...

Embodiment 2

[0059] The alkaline hydrogen peroxide mechanical pulping method of mild pretreatment and disc grinding chemical treatment of the present invention, flow chart is as figure 1 As shown, the specific steps are as follows:

[0060] Step 1. Pretreat the hardwood log chips with biological enzymes, then wash them, pre-steam the washed chips at normal pressure, and finally decompose the steamed wood chips in the first stage of double-screw extrusion, and remove the The air, excess moisture and resin are squeezed out, and the wood chips are crushed;

[0061] The biological enzyme selected in step 1 is the sum of laccase, HBT mediator and pectinase, that is, firstly add the HBT mediator with a mass fraction of 0.5%, then add 12IU / g of laccase, and finally add 10IU / g of pectinase Gluease, pretreatment time 110min, pH=6, temperature 55°C, pretreatment concentration 10% by mass.

[0062] The temperature of the water during washing in step 1 is 70° C., the washing time is 20 minutes, the ...

Embodiment 3

[0076] The alkaline hydrogen peroxide mechanical pulping method of mild pretreatment and disc grinding chemical treatment of the present invention, flow chart is as figure 1 As shown, the specific steps are as follows:

[0077] Step 1. Pretreat the hardwood log chips with biological enzymes, then wash them, pre-steam the washed chips at normal pressure, and finally decompose the steamed wood chips in the first stage of double-screw extrusion, and remove the The air, excess moisture and resin are squeezed out, and the wood chips are crushed;

[0078] The biological enzyme selected in step 1 is the sum of laccase, HBT mediator and pectinase, that is, first add the HBT mediator with a mass fraction of 0.5%, then add 11IU / g of laccase, and finally add 9IU / g of pectinase Gluease, pretreatment time 120min, pH=5, temperature 53°C, pretreatment concentration 13% by mass.

[0079] In step 1, the temperature of the water during washing is 65° C., the washing time is 18 minutes, the te...

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Abstract

The invention discloses an alkaline hydrogen peroxide mechanical pulping method based on mild pretreatment and disc milling chemical treatment. The method comprises the following steps: firstly, pretreating broad-leaf wood log chips by using a biological enzyme, then washing, carrying out normal-pressure pre-steaming on the washed wood chips, carrying out first-section double-screw extrusion defibering on the steamed wood chips, extruding air, excessive moisture and resin in the wood chips, and grinding the wood chips to be fine; and carrying out secondary bio-enzyme treatment, first-stage chemical pre-impregnation, second-stage chemical pre-impregnation and high-concentration pulping, dehydrating and concentrating the ground pulp, then carrying out latency elimination to increase the strength of the paper, screening and purifying the pulp subjected to latency elimination, separating impurities from qualified fibers by screening pulp fibers, and finally, dehydrating and concentrating to obtain the paper pulp meeting the requirements. The problems that in the prior art, a pulping method is poor in stability and poor in paper pulp quality are solved.

Description

technical field [0001] The invention belongs to the technical field of high-yield pulp, in particular to an alkaline hydrogen peroxide mechanical pulping method with mild pretreatment and disc grinding chemical treatment. Background technique [0002] Since the first P-RC APMP pulping production line was successfully operated in Hunan Tigerlin Paper Group in 2003, P-RCAPMP pulping technology has wide adaptability of raw materials, high utilization rate, less pulping pollution load and excellent pulp performance. It is easy to adjust the process conditions of chemical pretreatment and alkaline hydrogen peroxide bleaching stage, etc. It is suitable for the structure and characteristics of my country's short-cycle industrial wood raw materials, and has become one of the main technologies for high-yield pulp production in my country. Since the P-RC APMP pulping technology is a new type of pulping technology developed in the late 1990s, the company lacks correct guidance. When pul...

Claims

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Application Information

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IPC IPC(8): D21H11/02D21C5/00D21C1/02D21B1/16D21C1/06
CPCD21H11/02D21C5/005D21C1/02D21B1/16D21C1/06
Inventor 栾飞杜晓云桓源
Owner 山东奥海纸业有限公司
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