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Environment-friendly pulping technology

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 white pulp yield. 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 invention belongs to the technical field of improved technology for a pulping technology and in particular relates to an environment-friendly pulping technology. The environment-friendly pulping technology is characterized by comprising the following steps of (1) cutting out and dedusting for pulping raw material, (2) adding water and medicine to mix, (3) grinding for the first time, (4) conducting heat-preservation bleaching for one time, (5) shoving and washing, (5) adding medicine for the second time, (7) conducting the heat-preservation bleaching for the second time, (8) shoving, (9) washing and (10) recovering non-fiber material to produce organic fertilizer. Pulping time can be reduced and non water is discharged; no smell is caused; the pulping technology is high efficient and energy-saving; low equipment investment is required; high white pulp yield and whiteness degree can be achieved; low cost is demanded; and yellowing of the paper pulp can be avoided, so the pulp manufactured by the pulping technology is better than full-chemical pulp.

Description

(1) Technical field [0001] The invention belongs to the technical field of an improved pulping process, in particular to an environment-friendly pulping process. (2) Background technology [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 cap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/14
Inventor 韩君昌
Owner QINGDAO BAIJIANCHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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