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Preparation process of paper pulp for packaging paper

A preparation process and technology of wrapping paper, applied in the directions of wrapping paper, wrapping paper, packaging, etc., can solve the problems of waste, no further utilization of pharmaceuticals, and high processing costs

Inactive Publication Date: 2019-03-05
黑龙江如柏科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing cost of "black liquor" is high, and at the same time, the unresponsive agents contained in "black liquor" have not been further utilized, which has caused further waste

Method used

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  • Preparation process of paper pulp for packaging paper
  • Preparation process of paper pulp for packaging paper
  • Preparation process of paper pulp for packaging paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0168] 1. Prepare high-grade paper from grasses——rice straw

[0169] Select dry straw, remove impurities and dust, and crush it. There is a trumpet-shaped dust removal device at the entrance of the pulverizer, and there are two trumpet-shaped dust removal devices next to the screw rod at the feeding port of the silo. The crushing is to crush the raw materials. into 2-3 cm sections, sieved and separated to obtain pulping raw materials, and stored in the silo;

[0170] Add 1 ton of the above-mentioned pulping raw material - straw into the No. 1 reaction tank by means of screw feeding, and use the same feeding method to add 3 tons of clean water and / or recycled water, 62kg of hydrogen peroxide and 62kg of sodium hydroxide At the same time, add it to the No. 1 reaction tank, stir evenly, and keep the pH of the mixed material in the No. 1 reaction tank greater than or equal to 12; due to the self-heating phenomenon of the softening reaction, when the reaction starts, the temperatur...

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PUM

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Abstract

The invention provides a preparation process of paper pulp for packaging paper. The preparation process is characterized by comprising the following steps: in a pulping process of high-grade paper, carrying out alkali-adding softening and pressing on gramineous plant raw materials for the first time to obtain pressed water, carrying out standing precipitation on a part of the pressed water to obtain a dry substance, optionally adding the dry substance into fresh gramineous plant raw materials, and carrying out mixing with the other part of the pressed water to obtain a mixed material; adding an alkaline reagent into the mixed material to further adjust the pH value to be 13 or above, and carrying out cold leaching; pressing the mixed material subjected to cold leaching, and refining the pressed mixture obtained after pressing in a high-consistency refiner; and feeding the refined pulp into a reaction tank for a reaction, and adding acid to the paper pulp obtained after the reaction toadjust the pH value to be 7-7.5, so as to obtain the pulp for packaging paper. The preparation method has the advantages of simple process, low equipment investment, low production cost, good pulp quality and high pulp yield, and the pulp yield can be up to 85-95%.

Description

technical field [0001] The invention relates to a pulp preparation process, in particular to a pulp preparation process for packaging paper. Background technique [0002] Pulp is a fibrous substance made from plant fibers through different processing methods. According to the processing method, it can be divided into mechanical pulp, chemical pulp and chemical mechanical pulp; it can also be divided into wood pulp, straw pulp, hemp pulp, reed pulp, sugarcane pulp, bamboo pulp, rag pulp, etc. according to the fiber raw materials used. According to different purity, it can be divided into refined pulp, bleached pulp, unbleached pulp, high-yield pulp, semi-chemical pulp, etc. Generally used in the manufacture of paper and cardboard. [0003] In recent years, with the continuous strengthening of environmental protection management in my country, this has put forward higher requirements for the wastewater discharge indicators generated in the pulping process of some enterprises...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/20D21C3/02D21H27/10D21C9/18
CPCD21C3/02D21C9/18D21D1/20D21H27/10
Inventor 刘长如钱月起
Owner 黑龙江如柏科技有限公司