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Mechanical cold method for making paper pulp

A technology of pulp and cold process, which is applied in the field of papermaking, can solve the problems of low pulp yield, serious environmental pollution, high production cost, etc., and achieve the effects of cost reduction, low environmental pollution and simple manufacturing method

Inactive Publication Date: 2006-09-06
田永兴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of making pulp is complicated, and a large amount of water and chemicals are used. The production of 1 ton of paper generally requires 800 tons of water, and at the same time, about 25% of the total weight of papermaking raw materials needs to be added. Low yield of pulp
Therefore, the production cost is high and the environmental pollution is serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1 of the present invention: use straw, wheat stalk, shuttleweed, bagasse, reed, awn stalk, cotton stalk or hemp stalk as papermaking raw materials separately, or use any two or Two or more or all of them are mixed in equal proportions or mixed together in any proportion as papermaking raw materials. The papermaking raw materials are chopped, then soaked in water, softened by steam, and processed into fiber velvet by a single spiral rubbing and separating machine. For raw materials, the single-spiral grinding and splitting machine is best to use the TMF type single-spiral grinding and splitting machine, and then the softened paper-making raw materials are ground by a high-concentration refiner with a model of ZDPHФ500-600 to obtain pulp. When the concentration of the obtained slurry is too high, an appropriate amount of water can be added, and the pulp can be obtained after the slurry is processed by a conventional screener. The pulp obtained in this embodimen...

Embodiment 2

[0011] Embodiment 2 of the present invention: use bamboo, wood, straw, wheat stalk, shuttleweed, bagasse, reed, awn stalk, cotton stalk or hemp stalk as papermaking raw materials separately, or use these several kinds of plants Any two or more than two kinds or all of them are mixed in equal proportions or mixed together in any proportion as papermaking raw materials. The papermaking raw materials are chopped, soaked in water, and processed into fiber velvet by TMFФ250 double-helix grinding and separating machine. After the raw materials are made, soften the velvet-like raw materials in the steaming ball or pulp tank, add 3-10% of the total weight of papermaking raw materials to the steaming ball or pulp tank, and inject 1-2 lbf / square inch pressure steam, keep it warm for 15-25 minutes, and then exhaust; then pass in steam with a pressure of 5-6 lbf / sqin, keep it at high pressure for 90-120 minutes, and then spray out the raw materials in the steaming ball or pulp tank togethe...

Embodiment 3

[0012] Embodiment 3 of the present invention: Bamboo or wood is mixed alone or in equal proportions, or mixed together in any proportion as paper-making raw materials, and the paper-making raw materials are chopped, soaked in water, and processed by a TMFФ250 double-helix grinding and separating machine. Fiber velvet-like raw materials, soften the fiber velvet-like raw materials by steam, and then grind the softened raw materials through a high-concentration refiner to obtain a slurry. After the slurry is processed by a refiner and a screener, it can be Pulp is obtained for making fine paper on a conventional paper machine. The pulp obtained in this embodiment can be used to make cultural papers such as typing paper, writing paper, and newsprint by conventional paper machines.

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Abstract

The invention discloses the method for preparing pulp with mechanical cold process, comprising the following steps: cutting the raw material, then the raw material passing single-helical or double-helical thread rolling machine to form filament wooly mass raw material, softening with vapor, grinding them with pulp grinder, and getting paper pulp. The paper pulp has good quality, and can provide good paper pulp raw material for producing paper. The method has high productivity. The method can directly produce paper pulp, avoiding the water pollution. The invention has the advantages of simple method, low cost and little environmental contamination.

Description

technical field [0001] The invention relates to a method for producing paper pulp by a mechanical cold method, belonging to the technical field of papermaking. Background technique [0002] In the prior art, the manufacturing method of pulp is usually to chop the papermaking raw materials, add water and alkali to cook for 3 to 5 hours, wash and rinse the cooked pulp, and make finished pulp after grinding, and then pass it through a paper machine. Create paper. The process of making pulp is complicated, and a large amount of water and chemicals are used. The production of 1 ton of paper generally requires 800 tons of water, and at the same time, about 25% of the total weight of papermaking raw materials needs to be added. The yield of pulp is low. Therefore, the production cost is high and the environmental pollution is serious. Contents of the invention [0003] The object of the present invention is to provide a method for producing pulp by mechanical cold method with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/22D21B1/30D21C7/00D21C3/02
Inventor 田永兴
Owner 田永兴
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