Method for cleaning desulfurizing tower filler

A desulfurization tower, water cleaning technology, applied in cleaning methods and utensils, cleaning methods using liquids, separation methods, etc., can solve the problems of increased resistance of desulfurization towers, affecting normal gas transmission, and reducing the specific surface area of ​​packing.

Inactive Publication Date: 2016-11-09
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the HPF desulfurization process of coke oven gas in coking plants, the desulfurization tower is filled with a large number of fillers to increase the contact area between hydrogen sulfide in the gas and the desulfurization liquid. During use, due to the adhesion and deposition of impurities such as suspended sulfur, the desulfurization tower packing will be blocked. In severe cases, the specific surface area of ​​the filler will decrease sharply, which not only directly reduces the desulfurization efficiency, but also increases the resistance of the desulfurization tower, affecting the normal transportation of gas
When the packing body of the desulfurization tower is seriously blocked, it is generally treated by replacing it as a whole, but the price of the packing is high, which will increase the cost of desulfurization

Method used

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  • Method for cleaning desulfurizing tower filler

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Effect test

Embodiment 1

[0017] A method for cleaning desulfurization packing, comprising the steps of high-pressure water washing (1), concentrated sulfuric acid reaction (2) and water washing (3), the specific method is as follows:

[0018] High-pressure water flushing (1): Take out the filler blocked by impurities such as sulfur from the desulfurization tower, and first flush it with high-pressure water for 10 minutes. Effectively wash off the clogging impurities from the surface of the packing. Excessive water pressure will damage the celadon packing and destroy the integrity of the packing. The pressure of the water flow is generally 40-80bar to wash away the sulfur attached to the surface of the packing.

[0019] Concentrated sulfuric acid reaction (2): Drain the water on the filler, and then put the filler one by one into a corrosion-resistant cleaning tank with a mass fraction of 70% concentrated sulfuric acid to react, and use steam to indirect heat to 80°C, steam indirect heating can make Th...

Embodiment 2

[0023] A method for cleaning desulfurization packing, comprising the steps of high-pressure water washing (1), concentrated sulfuric acid reaction (2) and water washing (3), the specific method is as follows:

[0024] High-pressure water flushing (1): Take out the packing blocked by impurities such as sulfur from the desulfurization tower, and first flush it with high-pressure water for 5 minutes. Effectively wash off the clogging impurities from the surface of the packing. Excessive water pressure will damage the celadon packing and destroy the integrity of the packing. The pressure of the water flow is generally 40-80bar to wash away the sulfur attached to the surface of the packing.

[0025] Concentrated sulfuric acid reaction (2): Drain the water on the filler, and then put the filler one by one into a corrosion-resistant cleaning tank with a mass fraction of 85% concentrated sulfuric acid to react, and use steam to indirect heat to 40°C, steam indirect heating can make Th...

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Abstract

The invention provides a method for cleaning a desulfurizing tower filler. The problems that the specific surface area and the desulfurizing efficiency of the filler are affected due to the fact that the filler is blocked by sulphur and other impurities can be solved. The method comprises the steps that the filler blocked by the sulphur and the other impurities is taken out from a desulfurizing tower and is cleaned with high-pressure water at first so that most of the sulphur attached to the surface of the filler can be cleaned off, and water on the filler is drained off; then, the filler is put into an anti-corrosion cleaning tank containing concentrated sulfuric acid to be dissolved and indirectly heated with steam and other thermal mediums, and the residual sulphur in gaps of the filler is removed; and the filler is taken out after the attaching impurities are dissolved, after sulfuric acid on the surface of the filler is drained off, the filler is put into a clean-water reservoir to be cleaned and can be installed into the desulfurizing tower to be continuously used after being taken out and dried in the air. The method for cleaning the desulfurizing tower filler has the advantages that the sulphur and the other impurities attached to the surface of the filler are thoroughly cleaned through the concentrated sulfuric acid which is low in cost and easy to purchase, the effect of the cleaned filler is completely the same as that of a new filler, and the filler can be used repeatedly.

Description

technical field [0001] The invention belongs to the field of coke oven gas desulfurization tower filler cleaning and reuse, and in particular relates to a method for thoroughly removing impurities such as sulfur attached to fillers by utilizing the characteristics of concentrated sulfuric acid. Background technique [0002] In the HPF desulfurization process of coke oven gas in coking plants, the desulfurization tower is filled with a large number of fillers to increase the contact area between hydrogen sulfide in the gas and the desulfurization liquid. During use, due to the adhesion and deposition of impurities such as suspended sulfur, the desulfurization tower packing will be blocked. In severe cases, the specific surface area of ​​the filler will decrease sharply, which will not only directly reduce the desulfurization efficiency, but also increase the resistance of the desulfurization tower and affect the normal transportation of gas. When the packing body of the des...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B3/02B08B3/08C10K1/08B01D53/78B01D53/52
CPCB08B3/02B01D53/52B01D53/78B08B3/08C10K1/08
Inventor 李向军徐振栋
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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