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Method and device for secondarily filtering doctor solution by side stream

A desulfurization liquid and sideline technology, applied in the field of synthetic ammonia desulfurization liquid purification, can solve problems such as affecting the normal production of enterprises, deteriorating the quality of poor liquid, affecting desulfurization efficiency, etc., to reduce the content of suspended sulfur and secondary salts, avoid environmental pollution, and improve desulfurization The effect of efficiency

Inactive Publication Date: 2009-09-16
YANKUANG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This not only deteriorates the quality of the lean liquid and affects the desulfurization efficiency, but also leads to frequent blockage of the desulfurization tower, which has to be stopped and cleaned, which seriously affects the normal production of the enterprise.

Method used

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  • Method and device for secondarily filtering doctor solution by side stream

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: (method embodiment)

[0022] A method for finely filtering desulfurization liquid with a side line, the steps are as follows:

[0023] 1) Use a desulfurization pump to pump the desulfurization liquid from the lean liquid tank into the main pipeline of the desulfurization liquid;

[0024] 2) Open the valve connected to the desulfurization liquid side line pipeline diversion on the desulfurization liquid main pipeline, the desulfurization liquid side line pipeline diverts about 8% of the flow rate of desulfurization liquid, and is sent to the filter for filtering;

[0025] 3) The filtered desulfurization liquid filtrate is sent back to the lean liquid tank through the filtrate pipe;

[0026] 4) When the filtered desulfurization liquid filtrate sent back to the lean liquid tank is significantly reduced, the filter equipment needs to be regenerated. The valve is opened, and the air from the air tank enters the filter for forward blowing through the forward b...

Embodiment 2

[0030] Embodiment 2: (method embodiment)

[0031] Same as embodiment 1, except that in step 2, about 12% of the flow of the desulfurized liquid diverted from the side line pipeline of the desulfurized liquid is sent to the filter for filtration.

Embodiment 3

[0032] Embodiment 3: (method embodiment)

[0033] Same as Example 1, except that in step 2, the desulfurized liquid with about 18% flow diverted from the side line pipeline of the desulfurized liquid is sent to the filter for filtration.

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PUM

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Abstract

The invention relates to a method and a device for secondarily filtering a doctor solution by side stream, and belongs to the technical field of purification of the doctor solution of synthesis ammonia. The method adopts a doctor solution side-stream filter process, and desulfurizes the doctor solution by a doctor solution side-stream filter system and a filter regeneration system which regenerates the filter system; and the device consists of the doctor solution side-stream filter system and the filter regeneration system. The invention is suitable for tannin extract normal pressure desulfurization systems; and after the doctor solution shunted on a doctor solution main pipeline is desulfurized by the device, suspending sulfur and secondary salt contents in deficient liquid after the desulfurization can be effectively reduced, and phenomenon of tower blockage of a desulfurizing tower is reduced. The method and the device not only improve the desulfurization efficiency of the tannin extract desulfurization systems and prolong the stable operation cycle of the systems, but also reduce the discharge of the doctor solution due to tower cleaning; and the suspending sulfur particles after the desulfurization are not discharged and have no pollution, the phenomenon of the tower blockage of the desulfurizing tower is reduced, and the system is stably operated in a long cycle; and the method and the device realize online operation and online back washing, and optimally configure a back washing solution to prevent the back washing solution polluting the environment.

Description

technical field [0001] The invention belongs to a method and equipment for side line precision filtration of desulfurization liquid, and belongs to the technical field of purification of synthetic ammonia desulfurization liquid. Background technique [0002] Desulfurization is an important process for the purification of synthetic ammonia gas, and it is also a link where cumbersome processes restrict production. Most domestic small nitrogen fertilizer production enterprises use alkaline solution plus catalyst absorption method to remove H in semi-water gas and shift gas. 2 S. The general process route is that the semi-water gas enters the desulfurization tower from the gas cabinet through the gas scrubber, electrostatic decoking, Roots blower and cooling tower, and contacts with the desulfurization liquid countercurrently in the packing layer of the desulfurization tower. After the organic sulfur is absorbed by the solution, it enters the separator and cleaning cooler, and...

Claims

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Application Information

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IPC IPC(8): B01D36/00B01D41/00
Inventor 俎宇刘昭斌李明华严峰冯质杭苟桂民白华林樊凤升孙素琴姚刚
Owner YANKUANG GRP CO LTD
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