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Washing device of scaling substances on surface of pulp washer and washing method of scaling substances on surface of pulp washer

A cleaning device and pulp washer technology, applied in cleaning methods and appliances, chemical instruments and methods, cleaning hollow objects, etc., can solve the problems of increasing the cost of replacing filter plates, affecting the efficiency of equipment operation, and poor fluidity of filtrate. Achieve the effect of improving production capacity and equipment operation efficiency, improving fluidity and reducing content

Active Publication Date: 2014-09-10
湖南骏泰新材料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the filter plate of the pulp washer is fouled, the fluidity of the filtrate is poor, which not only reduces the production capacity and increases energy consumption, but also causes the filter plate to be damaged prematurely due to repeated pressure, so that the filter plate of the pulp washer needs to be replaced frequently, which affects both To the efficiency of equipment operation, it also greatly increases the cost of replacing the filter plate
At present, for the scale formed by calcium oxalate and magnesium oxalate, the effect of ordinary alkaline washing, high-pressure water cleaning, manual cleaning, etc. is not satisfactory, and it is difficult to fundamentally remove the scaling.

Method used

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  • Washing device of scaling substances on surface of pulp washer and washing method of scaling substances on surface of pulp washer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: When using the above-mentioned cleaning device to clean the surface fouling of the DD pulp washer in the bleaching chlorine dioxide section, first clean the pulp and sundries in the DD pulp washer and the pipeline with clean water, and use compressed gas or steam Blow and flush the DD pulp washer and corresponding pipelines to reduce the consumption of cleaning liquid in the cleaning process; add Buckman's Busperse 2043 cleaning agent aqueous solution to the chemical liquid circulation tank 3, its concentration is 7wt%, and the temperature is 80 ℃; start the chemical liquid circulation pump 4, pump the cleaning chemical liquid into the top spray pipe 1 of the DD pulp washer 2 and the cleaning pipe at the bottom to perform circular cleaning on the DD pulp washer 2, and clean the chemical liquid during the cleaning process It can also be pumped into the top spray pipe 1 of the DD pulp washer 2 or the cleaning pipe at the bottom; after 8 to 12 hours of circula...

Embodiment 2

[0024] Embodiment 2: When using the above-mentioned cleaning device to clean the surface fouling of the DD pulp washer in the bleaching chlorine dioxide section, first clean the pulp and sundries in the DD pulp washer and the pipeline with clean water, and use compressed gas or steam The DD pulp washer and corresponding pipelines are purged to reduce the consumption of cleaning liquid in the cleaning process; the Busperse 2043 cleaning agent aqueous solution of Buckman Company is added to the chemical liquid circulation tank 3, its initial concentration is 12wt%, and the temperature 70°C; start the chemical liquid circulation pump 4, pump the cleaning chemical liquid into the top spray pipe 1 of the DD pulp washer 2 and the cleaning pipe at the bottom to circulate and clean the DD pulp washer 2, and clean during the cleaning process The liquid medicine can also only be pumped into the top spray pipe 1 of the DD pulp washer 2 or the cleaning pipe at the bottom; after 8 to 12 hou...

Embodiment 3

[0025] Embodiment 3: When using the above-mentioned cleaning device to clean the surface fouling of the DD pulp washer in the bleaching chlorine dioxide section, first clean the pulp and sundries in the DD pulp washer and the pipeline with clean water, and use compressed gas or steam The DD pulp washer and corresponding pipelines are purged to reduce the consumption of cleaning liquid in the cleaning process; the Busperse 2043 cleaning agent aqueous solution of Buckman Company is added to the chemical liquid circulation tank 3, its initial concentration is 15wt%, and the temperature 60°C; start the chemical liquid circulation pump 4, pump the cleaning chemical liquid into the top spray pipe 1 of the DD pulp washer 2 and the cleaning pipe at the bottom to circulate and clean the DD pulp washer 2, and clean during the cleaning process The liquid medicine can also only be pumped into the top spray pipe 1 of the DD pulp washer 2 or the cleaning pipe at the bottom; after 8 to 12 hou...

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Abstract

A cleaning device and cleaning method for fouling on the surface of a pulp washer, the cleaning device includes a pulp washer (2); a liquid medicine circulation tank (3) connected to a filtrate pipe of the pulp washer (2); The lower part of the liquid medicine circulation tank (3) is connected to the liquid medicine circulation pump (4) by a pipe; the outlet of the liquid medicine circulation pump (4) is connected to the top spray pipe (1) of the washer (2) through a pipe Or / and connected to the cleaning tube at the bottom. The cleaning method includes: adding cleaning liquid into the chemical liquid circulation tank (3); starting the chemical liquid circulation pump (4), pumping the cleaning liquid into the top spray pipe (1) of the pulp washer (2) ) or / and the cleaning pipe at the bottom to perform circular cleaning on the pulp washer (2); after cleaning, stop the liquid circulation pump (4), and purge and clean the pulp washer.

Description

Technical field [0001] The present invention involves the surface cleaning device of the production equipment on the field of pulp and paper, especially the scaling device on the surface of a slurry machine; the present invention also involves the cleaning method of the surface of the slurry machine. Background technique [0002] There are often dirt produced in the slurry tower, pulp washing machine, and spiral conveyor in the bleach of the pulp, and the cause of the scaling is more complicated.The reason is that the pH value of the slurry after alkaliization rises, as well as the large amount of alkalinized inguin. On the other hand, whether it is wood pulp or grass slurry, sulfate cooking will produce hexyl acid (hexa),This substance will be transformed into oxalic acid after oxygen drift.Ocaxalic acid is easy to combine with calcium and magnesium ions to form calcium oxalate and magnesium oxalate precipitation. When the pH value of the system is> at 3, it will be precipita...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B9/027
Inventor 万政周鲲鹏徐应盛
Owner 湖南骏泰新材料科技有限责任公司