Regeneratable wet fuel gas desulfurizing technology

A wet flue gas desulfurization and process technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of high absorbent loss rate and high operating costs, and achieve reduced losses, low operating costs, and high operating costs. small loss effect

Inactive Publication Date: 2008-05-28
CHINA PETROCHEMICAL CORP +1
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the disadvantages of high operating cost and high loss rate of absorbent during use in the prior art, and provides a new renewable wet flue gas desulfurization process, which can handle high SO X Concentration of boiler flue gas and metallurgical industry tail gas, also can handle SO X Refinery waste gas with lower concentration, and the process provided by the invention has low energy consumption, low operating cost and less loss of absorbent

Method used

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  • Regeneratable wet fuel gas desulfurizing technology

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Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0027] See Table 1 for operating conditions, and Table 2 for flue gas composition and test results.

[0028] Table 1 Operating Conditions

[0029]

[0030] Table 2 Flue gas composition and test results

[0031] project

[0032] The test results show that: for different SO 2 content of flue gas, by changing the operating conditions, the desulfurization rate can reach more than 90%.

Embodiment 5

[0034] The catalyst regenerated flue gas from the catalytic cracking unit of the refinery is used as the flue gas raw material. The flue gas enters the lower part of the scrubber. In the flue gas scrubber, the flue gas is in reverse contact with the cooling water to remove the small particles of dust and a small amount of SO 3 , then the flue gas enters the lower part of the absorption tower through the blower, and contacts with the absorbent on the top of the tower countercurrently. The liquid-gas volume ratio is 0.001, and the temperature of the absorption tower is 50 ° C. 2 The rich liquid is discharged from the bottom of the tower and enters the regeneration tower. The temperature at the top of the regeneration tower is 105°C, and the temperature at the bottom of the tower is 110°C. The absorbent after the salt returns to the absorption tower, and a small amount of heat-stable salt is discharged in the form of inorganic salt. The composition and test results of the flue gas...

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Abstract

The invention discloses a reproducible wet flue gas desulfurization technique, which solves the problems of the prior art of high operation cost and high loss rate when absorbent is in use. The invention is characterized in that after going through a washing tower, flue gas containing gas SO< X > is then connected with the absorbent in a reverse flow in an absorption tower; the purified flue gas is discharged into the atmosphere; a portion of pregnant solution absorbent directly returns to the absorption tower for circular application, wherein SO2 of the flue gas is absorbed by the pregnant solution; a portion of air stripping is used circularly after a regeneration. The invention has the advantages that the energy consumption and operation cost of the technique are low, and loss of the absorbent is small.

Description

technical field [0001] The invention belongs to the field of chemical purification of flue gas, and in particular relates to a renewable wet flue gas desulfurization process. Background technique [0002] SO X It will pollute the environment in the form of acid rain, SO produced in the petrochemical industry X It mainly comes from catalytic cracking unit and sulfur recovery unit. Currently controls SO X There are three main emission methods: 1) hydrogenation of feedstock oil, the generated H 2 The S desulfurization recovery unit performs sulfur recovery. This method has a good desulfurization effect and is suitable for raw materials with high sulfur content. For raw materials with medium or low sulfur content, the cost is relatively high; 2) Use sulfur transfer additives to convert SO X converted to H 2 S, the sulfur transfer agent is highly targeted, SO X The removal rate is low, and it is suitable for raw materials with low sulfur content; 3) flue gas desulfurization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/96B01D53/50B01D53/14
Inventor 陈卫红裴旭东刘金龙翟海涛崔毅李永辉
Owner CHINA PETROCHEMICAL CORP
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