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Process for washing bamboo wood dissolving pulp

A technology for dissolving pulp and process, applied in the direction of washing/replacing pulp treatment liquid, etc., can solve problems such as damage, waste of water resources, waste of water resources and environment, and achieve the effect of saving water resources and reducing environmental damage

Inactive Publication Date: 2011-08-17
CHONGQING LEE & MAN PAPER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing bamboo dissolving pulp production equipment and technology are relatively backward, especially the washing process due to the backward equipment and technology, resulting in waste of water resources and damage to the environment
[0004] The Chinese invention patent with the application number 200810147992.5 introduces a method for preparing bamboo chemically dissolved pulp, which introduces that the washing process mainly uses 4 vacuum or pressure washers in series for washing. This technology also wastes water resources and damages the environment. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation process of bamboo dissolving pulp includes material preparation, cooking, screening (coarse and fine screening), washing, bleaching (oxygen delignification), and papermaking. This embodiment introduces a washing process of bamboo dissolving pulp, which adopts the countercurrent washing method of 4 pulp washing machines, and the pulp washing machines are respectively the first coarse screen washing machine, the second fine screen washing machine, and the third washing machine. Oxygen delignification pulp washer and fourth oxygen delignification pulp washer, the specific process is:

[0024] A. The hot water for washing is added from the fourth oxygen delignification pulp washer, and the filtrate of the fourth oxygen delignification pulp washer enters the third oxygen delignification pulp washer for washing;

[0025] B. The filtrate of the third oxygen delignified pulp washer enters the second fine screen washer for washing;

[0026] C, the filtrate of th...

Embodiment 2

[0036] The preparation process of bamboo dissolving pulp includes material preparation, cooking, screening (coarse and fine screening), washing, bleaching (oxygen delignification), and papermaking. This embodiment introduces a washing process of bamboo dissolving pulp, which adopts the countercurrent washing method of 4 pulp washing machines, and the pulp washing machines are respectively the first coarse screen washing machine, the second fine screen washing machine, and the third washing machine. Oxygen delignification pulp washer and fourth oxygen delignification pulp washer, the specific process is:

[0037] A. The hot water for washing is added from the fourth oxygen delignification pulp washer, and the filtrate of the fourth oxygen delignification pulp washer enters the third oxygen delignification pulp washer for washing;

[0038] B. The filtrate of the third oxygen delignified pulp washer enters the second fine screen washer for washing;

[0039] C, the filtrate of th...

Embodiment 3

[0049] The preparation process of bamboo dissolving pulp includes material preparation, cooking, screening (coarse and fine screening), washing, bleaching (oxygen delignification), and papermaking. This embodiment introduces a washing process of bamboo dissolving pulp, which adopts the countercurrent washing method of 4 pulp washing machines, and the pulp washing machines are respectively the first coarse screen washing machine, the second fine screen washing machine, and the third washing machine. Oxygen delignification pulp washer and fourth oxygen delignification pulp washer, the specific process is:

[0050] A. The hot water for washing is added from the fourth oxygen delignification pulp washer, and the filtrate of the fourth oxygen delignification pulp washer enters the third oxygen delignification pulp washer for washing;

[0051] B. The filtrate of the third oxygen delignified pulp washer enters the second fine screen washer for washing;

[0052] C, the filtrate of th...

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Abstract

The invention belongs to the technical field of preparation of dissolving pulp, and particularly relates to a process for washing bamboo wood dissolving pulp. The process for washing the bamboo wood dissolving pulp specifically comprises the following steps that: A, washing hot water is added from a fourth delignification pulp washer, and filtrate from the fourth delignification pulp washer enters a third delignification pulp washer for washing; B, filtrate from the third delignification pulp washer enters a second fine screening pulp washer for washing; C, filtrate from the second fine screening pulp washer enters a first coarse screening pulp washer for washing; and D, filtrate from the first coarse screening pulp washer is fed into a cooking process to be used. Water resources and damage of waste water to environment are reduced by recycling washing water.

Description

technical field [0001] The invention belongs to the technical field of preparation of dissolving pulp, and in particular relates to a washing process of bamboo dissolving pulp. Background technique [0002] Dissolving pulp is widely used in textile viscose fiber, nitrocellulose, cellulose acetate and other cellulose derivative industries, and the market demand is gradually expanding. At present, the newly developed bamboo dissolving pulp has a broad market prospect and can fill the gap of dissolving pulp in my country. [0003] However, the existing bamboo dissolving pulp production equipment and technology are relatively backward, especially the washing process due to the backward equipment and technology, resulting in waste of water resources and damage to the environment. [0004] The Chinese invention patent with the application number 200810147992.5 introduces a method for preparing bamboo chemically dissolved pulp, which introduces that the washing process mainly uses...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C9/02
Inventor 李文俊
Owner CHONGQING LEE & MAN PAPER MFG