Industrial sulfur tail gas desulfurization process

A desulfurization process and tail gas technology, applied in the direction of dispersed particle separation, chemical instruments and methods, separation methods, etc., can solve the problems of failing to meet emission requirements, high fuel consumption, poor economy, etc., and achieve low operating costs and no fuel consumption , the effect of low operating costs

Active Publication Date: 2018-06-08
SHANGHAI DONGHUA ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Sulfur-containing waste gas in industry is usually recovered in the form of elemental sulfur by means of a sulfur recovery unit. However, even after being treated by the recovery unit, H 2 S, Sx, COS, SO 2 Wait for a certain amount of sulfur-containing compounds to fail to meet the emission requirements
[0004] Using thermal incineration technology (TO) to treat sulfur-containing tail gas requires a large amount of fuel consumption, which is economical and often produces NOx and other by-products under high temperature conditions, causing secondary pollution

Method used

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  • Industrial sulfur tail gas desulfurization process

Examples

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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the sulfur-containing tail gas enters the SCO reactor, the inlet material temperature is controlled at 203°C, the outlet temperature is controlled at 312°C, and the operating pressure is controlled at 2.4Kpa. The purified tail gas is sent to the subsequent acid / ammonium sulfate unit or others.

[0025] It has been determined that the content of other components in the net exhaust gas is: SO 2 ≤150mg / Nm 3 ; where SO 2 The conversion rate is ≥96%.

Embodiment 2

[0027] Such as figure 1 As shown, the sulfur-containing tail gas enters the SCO reactor, the inlet material temperature is controlled at 235°C, the outlet temperature is controlled at 340°C, and the operating pressure is controlled at 8.5Kpa. The purified tail gas is sent to the subsequent acid / ammonium sulfate unit or others.

[0028] It has been determined that the content of other components in the purified tail gas is: SO 2 ≤150mg / Nm 3 ; where SO 2 The conversion rate is ≥96%.

Embodiment 3

[0030] Such as figure 1 As shown, the sulfur-containing tail gas enters the SCO reactor, the inlet material temperature is controlled at 272°C, the outlet temperature is controlled at 369°C, and the operating pressure is controlled at 15.8Kpa. The purified tail gas is sent to the subsequent acid / ammonium sulfate unit or others.

[0031] It has been determined that the content of other components in the purified tail gas is: SO 2 ≤150mg / Nm 3 ; where SO 2 The conversion rate is ≥96%.

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Abstract

The invention discloses an industrial sulfur-containing tail gas desulfurization process. After the sulfur-containing tail gas is mixed with combustion-supporting air, it is heated by a tail gas heater and enters a selective catalytic reactor. H2S, Sx, COS and SO2 in the tail gas are selectively catalyzed and oxidized The reaction is converted into SO3, and the high-temperature tail gas containing SO3 recovers heat through the waste heat recovery system and the tail gas heater, and then enters the downstream sulfuric acid unit or other treatment systems, wherein: the inlet temperature of the selective catalytic reactor is 200-500 °C, and the outlet temperature is 300 °C ~700°C; the operating pressure of the selective catalytic reactor is 0~50Kpa. The invention is suitable for treating sulfur-containing tail gas discharged from petrochemical, oil refining, coal chemical and other enterprises.

Description

technical field [0001] The invention relates to an industrial sulfur-containing tail gas desulfurization process, which is a treatment method for sulfur-containing waste gas discharged from industrial processes; in particular, it relates to a selective catalytic oxidation treatment process for sulfur-containing tail gas. Background technique [0002] Coal chemical, petrochemical, and refinery companies process sulfur-containing crude oil or sulfur-containing coal during production, producing a large amount of sulfur-containing waste gas. If these tail gases are discharged directly without treatment, they will not only fail to meet the national environmental protection requirements , It will also cause harm to the social environment and the health of the people, and aggravate meteorological disasters such as acid rain. Therefore, the desulfurization process of industrial tail gas has always been an important topic of concern in petrochemical and other industries. [0003] Su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/50B01D53/48B01D53/52
Inventor 赵小平李寒露王颖魏国倪海磊廖明杰戴源
Owner SHANGHAI DONGHUA ENVIRONMENT ENG
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