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Washing process used for modifying papermaking pulp into viscose fibre pulp

A technology for viscose fiber and pulp making, which is applied in the direction of washing/replacing pulp treatment liquid, etc., can solve problems such as inapplicability, achieve high washing degree, save heat energy and water, and be beneficial to environmental protection.

Inactive Publication Date: 2012-09-19
YIBIN GRACE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At the same time, since the semi-finished pulp after cooking and modification has the characteristics of high purity, the washing process in this patent is not suitable for washing the pulp after cooking and modification

Method used

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  • Washing process used for modifying papermaking pulp into viscose fibre pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A washing process for denaturation of papermaking pulp into viscose pulp, using a multi-stage countercurrent washing process, and adding a washing aid Busperse 2838 during the washing process, the process is as follows:

[0049] A Add black liquor to the coarse stock from cooking to reduce the concentration of high-concentration stock to 2.0%, then add detergent additive Busperse 2838 at a dosage of 0.5 kg / ton of stock, mix for 20 minutes, and pump Punch out and enter the stage I pulp washer;

[0050] B. Spray and wash the black liquor provided by the black liquor tank in the second stage, and the washed black liquor enters the black liquor tank in the first stage, and the black liquor temperature in the black liquor tank in the first stage is 75°C;

[0051]C Then the pulp enters the pulp washing machine in the second stage, and the washing water of the black liquor tank in the third stage is sprayed and washed with white water, and the washed washing liquid enters the ...

Embodiment 2

[0081] A washing process for denaturation of papermaking pulp into viscose pulp, using a multi-stage countercurrent washing process, and adding a washing aid Busperse 2838 during the washing process, the process is as follows:

[0082] A Add black liquor to the coarse stock from cooking to reduce the concentration of high-concentration stock to 2.4%, then add detergent additive Busperse 2838 at a dosage of 1.2 kg / ton of stock, mix for 10 minutes, and pump Punch out and enter the stage I pulp washer;

[0083] B. Spray and wash the black liquor provided by the black liquor tank in the second stage, and the washed black liquor enters the black liquor tank in the first stage, and the black liquor temperature in the black liquor tank in the first stage is 75°C;

[0084] C Then the pulp enters the pulp washing machine in the second stage, and the washing water of the black liquor tank in the third stage is sprayed and washed with white water, and the washed washing liquid enters the...

Embodiment 3

[0114] A washing process for denaturation of papermaking pulp into viscose pulp, using a multi-stage countercurrent washing process, and adding a washing aid Busperse 2838 during the washing process, the process is as follows:

[0115] A Add black liquor to the coarse pulp from cooking to reduce the concentration of high-concentration pulp to 2.5%, then add detergent additive Busperse 2838, the dosage is 1 kg / ton pulp, mix for 30 minutes, and the pulp pump Punch out and enter the stage I pulp washer;

[0116] B. Spray and wash the black liquor provided by the black liquor tank in the second stage, and the washed black liquor enters the black liquor tank in the first stage, and the black liquor temperature in the black liquor tank in the first stage is 72°C;

[0117] C Then the pulp enters the pulp washing machine in the second stage, and the washing water of the black liquor tank in the third stage is sprayed and washed with white water, and the washed washing liquid enters th...

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Abstract

The invention belongs to a washing process part used for modifying different paper pulps for papermaking into viscose fibre pulp, and provides a optimized washing process aiming at the characteristics of a half finished of paper pulp after modification, aiming at the actuality of the washing process that the energy is consumed, the pollution is large, and the hemicellulose and ash content can not be effectively removed, The washing process adopts a multistage countercurrent washing process, different washing devices are adopted in different washing stages, and an optimized washing parameter system is arranged; meanwhile, a washing assistant Busperse 2838 is added in a washing process, and the whole technological process can effectively improve washing capacity and black liquor extraction efficiency; and the hemicellulose and ash content are reduced, the efficiency is improved, the heat energy and the water are saved, and the washing process is beneficial for environmental protection.

Description

technical field [0001] The invention belongs to the washing process link in the production process of denaturing various paper pulps used for papermaking into viscose fiber pulp, and specifically relates to a washing method and applicable washing equipment. Background technique [0002] With the development of my country's viscose fiber industry, domestic enterprises mostly use cotton pulp as the raw material for viscose fiber production. The resource of raw cotton linters is increasingly in short supply due to the constraints of planting area and growth cycle. The impact of cycle and ecological balance has seriously restricted the development of my country's viscose fiber industry. [0003] For this reason, some enterprises have tried to use bamboo pulp and wood pulp as raw materials for the production of viscose fiber, and have achieved initial success. For example, the patent No. is CN02112175.3, and the name is called "bamboo pulp denatured production process" patent of i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C9/02
Inventor 薛勤于渭东刘爱兵李华邬龙
Owner YIBIN GRACE GROUP CO LTD
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