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Environment friendly energy-saving circulation type non-pollution pulping process and its system apparatus

An environment-friendly, energy-saving and recycling technology, which can be used in the fields of pulping with inorganic alkali, pulping with cellulose raw materials, pulp bleaching, etc. The effect of sustainable development, protecting the ecological environment and solving high pollution

Inactive Publication Date: 2008-12-10
李刚荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention provides an environment-friendly, energy-saving, circular pollution-free pulping process and its system device, which solves the problems of pulping, especially grass pulping black liquor pollution, washing and concentrated sewage pollution, waste residues and other waste pollution problems. In a sense, it solves the problems of complicated procedures and serious pollution widely existing in traditional pulping methods

Method used

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  • Environment friendly energy-saving circulation type non-pollution pulping process and its system apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Raw material: wheat straw or straw

[0034] The raw materials are cut by the knife-roller grass cutter, screened and dedusted by the horn deduster, and then enter the spiral roller-type wire splitter for fine processing of raw materials, and then enter the multi-functional steaming and bleaching integrated pulping equipment. Add the presoaking agent into the multi-functional steaming and bleaching integrated pulping equipment, the presoaking time is 30min, the temperature is 50°C, after the presoaking is completed, the cooking agent and oxygen are introduced to keep the oxygen pressure at 0.1Mpa, the reaction time is 45min, and the reaction time is 45min. The temperature is 60°C, and the bleaching agent is continued to be introduced after the cooking is completed, the bleaching reaction time is 45min, the temperature is 60°C, and the bleaching end point is discharged. Among them, the presoaking agent contains 0.2% EDTA, 0.5% alkali; the cooking agent contains 2% alkali,...

Embodiment 2

[0038] Raw material: reed

[0039]Raw materials are cut by knife-roller reed cutter or disc reed cutter, screened and dedusted by double-cone dust collector, and then enter disc-type wire splitter for fine processing of raw materials, and then enter multi-functional steaming and bleaching integrated pulping equipment middle. Add the presoaking agent into the multi-functional steaming and bleaching integrated pulping equipment, the presoaking time is 60min, the temperature is 100°C, after the presoaking is completed, the cooking agent and oxygen are introduced to keep the oxygen pressure at 0.3Mpa, the reaction time is 90min, and the reaction time is 90min. The temperature is 100°C, and the bleaching agent is continued to be introduced after the cooking is completed, the bleaching reaction time is 120min, the temperature is 100°C, and the bleaching end point is discharged. Among them, the presoaking agent contains 1.0% of EDTA and 3.5% of alkali; the cooking agent contains 6% ...

Embodiment 3

[0043] Raw material: cotton stalk

[0044] The raw materials are cut by the knife-roller grass cutter, screened and dedusted by the roller-type dust collector, and then enter the flying blade-type wire splitter for fine processing of raw material filaments, and then enter the multi-functional steaming and bleaching integrated pulping equipment. Add the presoaking agent into the multi-functional steaming and bleaching integrated pulping equipment, the presoaking time is 45min, the temperature is 80°C, after the presoaking is completed, the cooking agent and oxygen are introduced to keep the oxygen pressure at 0.2Mpa, the reaction time is 70min, and the reaction time is 70min. The temperature is 80°C, and the bleaching agent is continued to be introduced after the cooking is completed, the bleaching reaction time is 80min, the temperature is 80°C, and the bleaching end point is discharged. Among them, the presoaking agent contains 0.6% of EDTA and 2% of alkali; the cooking agent...

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Abstract

The invention relates to an environment-friendly energy-saving cyclic-type pollution-free pulping process and a system device thereof. The process comprises the following procedures of cutting material, screening, dedusting, thinning raw material, integrating steaming with bleaching, grinding pulp, screening, purifying, concentrating, treating water, granulating, supplying heat and generating electricity through biomass gasification, etc. The procedure of integrating steaming with bleaching comprises the following processes of presoaking, steaming, cooking and bleaching the raw material, wherein a presoaking agent is added to carry out presoaking for 30-60 min at a temperature between 50 and 100 DEG C; a steaming- cooking agent is added after presoaking, and oxygen is supplied to carry out steaming- cooking delignification reaction at the same time, with oxygen pressure kept between 0.1 and 0.3 MPa, for 45-90 min, at a temperature between 60 and 100 DEG C; bleaching agent is added after steaming- cooking, and the oxygen pressure continues to be kept, and bleaching reaction is carried out for 45-120 min at a temperature between 60 and 100 DEG C. The pulping process solves the pollution problems of lack liquor from pulping, especially straw pulping, washing sewage, discharged waste residue, etc., and solves the problem that is complex working procedure and serious pollution widely exist in the prior pulping in a real sense.

Description

technical field [0001] The invention relates to a pulping process and a device thereof, in particular to an environment-friendly, energy-saving, cycle-type pollution-free pulping process and a system device thereof. Background technique [0002] At present, my country's paper mills using grass fiber or wood as raw materials are spread all over the country. Most paper mills use the alkaline pulping process, which consists of cutting, dust removal, cooking, washing, screening and bleaching. During the screening process, a large amount of sewage is discharged, the concentration of suspended solids and organic substances in the water is high, the color is deep, the acid or alkali is large, and the biodegradability is poor. The traditional pulping process not only has complicated procedures, wastes water, acid or alkali, loses a lot of fibers, but also brings serious pollution to the environment. In order to reduce environmental pollution, the state shut down thousands of small a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/22D21C1/00D21C9/10D21C1/04D21C3/02D21H21/32
CPCD21C1/06D21C3/02D21C3/22D21C7/00D21C9/10D21C9/147D21C9/16
Inventor 李刚荣李军
Owner 李刚荣
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