Water treating method in pulping industry

A technology for water treatment and pulping, which is applied in the regeneration of lye and can solve problems such as the inability to effectively eliminate pollution.

Inactive Publication Date: 2003-11-26
梁植林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, various methods of processing black liquor used in industry, such as: conventional combustion method alkali recovery technology, acid analy

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0015] Wheat straw pulp was prepared by cooking with a steaming ball with a volume of 5 liters in the laboratory. Add 500 grams of air-dried wheat straw to the steamed ball, converted into 450 grams of dry wheat straw, 67 grams of sodium hydroxide, a small amount of anthraquinone and 2700 ml of water. Heat to 170°C, keep warm for 40 minutes, cool naturally to about 50°C, and take out the mixture of slurry and black liquor. Weighing a total of about 3255 grams of material, which is 12 grams less than the total amount of material added to the steaming ball, which may be the loss caused by sticking to the ball. Use a polyester filter to manually press and filter, squeeze out 1500ml of the original black liquor, add 1500ml of hot water, squeeze out 1800ml of black liquor, and squeeze out a total of 3300ml of thick black liquor, then add 2200ml of hot water to the slurry 2200 milliliters of dilute black liquor was produced. Then add 2200 milliliters of water in the slurry to pres...

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Abstract

The water treating method in pulping process features the multiple washing, extruding and filtering of pulp, and the produced filtrate is returned completely to washing and digesting pulp liquid. Bycombining with chemical deposition method, all the organic pollutants are converted into the precipitant, so that the water pollution during pulping process is eliminated thoroughly.

Description

field of invention [0001] The invention relates to a water treatment method in pulping process. More specifically, the present invention relates to water treatment during the pulping of alkaline wheat straw. Background technique [0002] Water pollution control is a major problem in my country's paper industry, and its main pollution comes from pulping black liquor. So far, there is no really effective black liquor treatment method applied in industry. Especially for the wheat straw pulping industry, which occupies the mainstream of the domestic pulping industry, the pollution problem is even more serious. At present, various black liquor treatment methods used in industry, such as: conventional combustion method alkali recovery technology, acid analysis lignin method and anaerobic aerobic biochemical method, etc., cannot effectively eliminate pollution, that is, they cannot really meet the standards. [0003] The present inventor devotes himself to the research of pulpin...

Claims

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Application Information

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IPC IPC(8): D21C11/04
Inventor 梁植林
Owner 梁植林
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