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Method for preventing desulfurizing tower from being blocked

A desulfurization tower, anti-blocking technology, applied in separation methods, chemical instruments and methods, separation of dispersed particles, etc.

Inactive Publication Date: 2015-04-01
张晓军
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this method is that it needs to add a solution storage tank and prepare a large amount of special solution.

Method used

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Examples

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example 1

[0019] A certain device originally used ADA desulfurization. In order to prevent tower blockage, a small amount of tannin extract was added to the desulfurization solution. Solution composition: Na 2 C0 3 5g / l, NaHCO 3 75g / l, NaV0 3 3g / l, ADA 2g / l, tannin extract 0.5-1.5g / l, potassium sodium tartrate 0.7-0.8g / l. The blockage of the second tower is very serious. Measures such as adding ammonia and adding PDS failed to prevent the increase of the pressure difference in the second tower, which affected the normal production.

[0020] Three months after the device was started up, the pressure difference of the second tower rose to 70KPa, which caused liquid entrainment and a decrease in desulfurization efficiency. After adding 2ppm of the above-mentioned anti-blocking agent of the present invention in the desulfurization liquid, the rising trend of the differential pressure of the two towers slows down. After a few days, the suspended sulfur content in the solution drops fr...

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Abstract

The invention relates to a method for preventing a desulfurizing tower from being blocked. An anti-blocking agent is added to a desulfurizing liquid of a wet oxidation desulfurization process (such as ADA and a tannin extract), so that the ascending velocity of differential pressure of the desulfurizing tower is delayed. In addition, the anti-blocking agent used by the method also has an effect of cleaning the tower. The anti-blocking agent adopted by the method has dual effects of preventing sulfur granules in the desulfurizing liquid from being cohered, and preventing the sulfur granules from growing in packing. A laboratory contrast test proves that through addition of 1-10ppm of anti-blocking agent to the desulfurizing liquid, the ascending velocity of the differential pressure of the desulfurizing tower can be reduced by over 70%, therefore, the method can be applied to desulfurizing liquids such as the tannin extract, the ADA, PDS or MSQ.

Description

technical field [0001] The invention relates to a method for preventing desulfurization tower blockage. Background technique [0002] As we all know, my country's synthetic ammonia industry widely uses wet oxidation to remove hydrogen sulfide in raw gas. Such desulfurization processes mainly include tannin extract method, improved ADA method, hydroquinone method, PDS method and MSQ method, etc. The technological processes of these desulfurization methods are basically the same (see <<Chemical Fertilizer Industry Encyclopedia>>, edited by Xie Weijie, P98-105, Beijing, Chemical Industry Press, 1988). The process is briefly described as follows: the gas containing hydrogen sulfide enters from the lower part of the desulfurization tower and is exported from the upper part. The solution that has absorbed hydrogen sulfide enters the oxidation tower from the bottom of the absorption tower and contacts with the compressed air (or self-priming air) entering the tower to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/52
Inventor 张晓军
Owner 张晓军
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