Environment friendly pulping process

A kind of pulping and crafting technology, applied in the direction of inorganic alkali pulping, cellulose raw material pulping, pulp bleaching, etc., can solve the problems of paper hygiene, heavy pollution, high pulping cost, etc., and save pulping time , low investment in equipment, high yield of white pulp

Active Publication Date: 2009-12-02
刘长如
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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...

Embodiment 3

[0063] The pulping process is the same as in Example 2.

[0064] Pulp sample analysis: the whiteness of wheat straw pulp is more than 80%, the yield of white pulp is 60%, the pulp brightness is good, the fiber is long, no yellowing, good water drainage, superior to full chemical pulp, and can produce various cultural papers and high-grade toilet paper.

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PUM

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Abstract

The invention belongs to the technical field of improved pulping process, and particularly relates to an environment friendly pulping process. The environment friendly pulping process is characterized by comprising the following steps: (1) chopping and dust removal of pulping materials; (2) material mixing by adding water and medicaments; (3) primary grinding; (4) primary thermal insulating bleaching; (5) pulp extruding and washing; (6) secondary medicament addition; (7) secondary thermal insulating bleaching; (8) pulp extruding; (9) pulp washing; and (10) the production of organic fertilizer by recycling non-fiber materials. The pulping process has the advantages of pulping time conservation, no discharge of pulping water, odorlessness, high efficiency, energy conservation, low equipment investment, high white pulp yield and whiteness, low cost, and no brightness reversion of the paper pulp; and the pulp prepared by the process is better than the 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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IPC IPC(8): D21C3/00D21C3/02D21C9/16D21B1/14
Inventor 刘长如
Owner 刘长如
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