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Environmentally friendly pulping process

A pulping and process technology, applied in the field of environmentally friendly pulping technology, can solve the problems of hygienic paper, heavy pollution, and high pulping cost, and achieve the advantages of saving pulping time, low equipment investment and high yield of white pulp. Effect

Inactive Publication Date: 2016-04-06
QINGDAO BAIJIANCHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The utilization of waste paper is a vicious cycle. The quality of paper is poor, the cost of pulping is high, the pollution is heavy, the cost of water treatment is high and the process is complicated; there is no mention of the hygiene of paper, especially toilet paper for household paper.
Waste paper also spreads viruses, which is really harmless

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: Take the pulping process of rice straw as an example:

[0040] (1) Grass cutting and dust removal: cut the straw into 2-5 cm long, remove impurities and other effective dust to achieve the goal of cleaning the straw, and pile up the dust removal materials;

[0041] (2) The dust-cleaned straw is sent to the mixing screw, and the pulping reuse water and hydrogen peroxide and sodium hydroxide of the sedimentation tank with a temperature of 50° C. are added, and the following weight ratio is adopted: straw: water: hydrogen peroxide: Sodium hydroxide=100:300:0.5:1, through the screw in the tank to promote the reaction, the straw can be softened in the mixing material to a certain extent;

[0042] (3) The softened straw is fed into the high-consistency refiner by the screw of the mixing material, and the straw at this time has become a coarse fiber;

[0043] (4) The ground crude fiber is sent to the thermal insulation bleaching chamber, and the crude fiber is r...

Embodiment 2

[0051] Take the pulping process of wheat straw as an example:

[0052] (1) Grass cutting and dust removal: cut the wheat straw into 2-5 cm long, remove impurities and other effective dust to achieve the purpose of cleaning the wheat straw, and pile up the dust-removed materials;

[0053] (2) The wheat straw that has been dedusted clean is sent to the mixing screw, and the pulping reuse water and hydrogen peroxide and sodium hydroxide of the sedimentation tank that add temperature are 60 ℃, adopt the following weight ratio: wheat straw: water: hydrogen peroxide: Sodium hydroxide=100:500:4:7, so that the wheat straw can be softened to a certain extent in the mixing material;

[0054] (3) Send the softened wheat straw into the high-consistency refiner by the screw of the mixing material, and the wheat straw at this time has become coarse fiber;

[0055](4) The crude fiber after grinding is sent to the thermal insulation bleaching chamber, and the crude fiber is reacted in the ch...

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Abstract

The present invention belongs to the technical field of pulping process improvement, and particularly relates to an environmentally friendly pulping process.. The environmentally friendly pulping process is characterized by comprising the following steps: (a) cutting off and dedusting a pulping raw material; (2) adding water and dosing, and blending; (3) conducting a first defibrination; (4) conducting a first thermal insulation bleaching; (5) squeezing pulp and washing; (6) dosing for the second time; (7) conducting a secondary thermal insulation bleaching; (8) squeezing pulp; (9) washing the pulp; and (10) recycling non-fibrous materials for production of organic fertilizers. The process has the advantages of pulping time saving, no discharge of the pulping water, no gas or odor, high efficiency, energy saving, low investment in equipment, high yield of white pulp, high whiteness, low cost and no brightness reversion of paper pulp; and the prepared pulp is superior to the whole chemical pulp.

Description

technical field [0001] The invention belongs to the technical field of an improved pulping process, in particular to an environment-friendly pulping process. Background technique [0002] my country has become the world's largest importer of wood pulp and waste paper. Waste paper imports account for 61% of the world's total net export of waste paper. The import of wood pulp and waste paper costs more than 12 billion US dollars in foreign exchange. According to customs statistics in 2008, my country imported 24.206 million tons of waste paper and 9.521 million tons of pulp, totaling 33.727 million tons. Domestically purchased nearly 30 million tons of waste paper. In 2008, the actual production of paper and cardboard in the country was more than 68 million tons, while the domestic self-produced pulp was more than 4 million tons. Of the more than 4 million tons of self-produced pulp, 80% came from yellow cardboard mills, while domestic white paper The production capacity of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/02D21H11/12
Inventor 张栋
Owner QINGDAO BAIJIANCHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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