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Industrial sulfur-containing tail gas desulphurization technology

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: 2016-10-05
SHANGHAI DONGHUA ENVIRONMENT ENG
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  • Summary
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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-containing tail gas desulphurization technology

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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 production unit or others.

[0025] After measurement, the content of other components in the net tail 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 production unit or others.

[0028] After testing, the content of other components in the purified exhaust 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 production unit or others.

[0031] After testing, the content of other components in the purified exhaust 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 desulphurization technology. According to the technology, sulfur-containing tail gas and combustion air are mixed, and heated by a tail gas heater, then is introduced into a selective catalytic reactor, H2S, Sx, COS and SO2 in the tail gas are subjected to a selective catalytic oxidation reaction and then converted to SO3, high-temperature tail gas containing SO3 passes through a waste heat recovery system and a tail gas heater for waste heat recovery, and the tail gas is introduced into a downstream sulfuric acid unit or other processing system; wherein the temperature at an inlet of the selective catalytic reactor is 200-500 DEG C, the temperature at an outlet is 300-700 DEG C; and the operation pressure of the selective catalytic reactor is 0-50 Kpa. The industrial sulfur-containing tail gas desulphurization technology is suitable for processing sulfur-containing tail gas discharged from petrochemical engineering, oil refining and coal chemical enterprises.

Description

Technical field [0001] The invention relates to an industrial sulfur-containing tail gas desulfurization process, which is a treatment method of sulfur-containing waste gas discharged from an industrial process; in particular, it relates to a selective catalytic oxidation treatment process of sulfur-containing tail gas. Background technique [0002] Coal chemical, petrochemical, and refineries process sulfur-containing crude oil or sulfur-containing coal in production, and produce a large amount of sulfur-containing waste gas. If these tail gas is directly discharged without treatment, it will not only fail to meet the national environmental protection requirements , It will cause harm to the social environment and people's health, and aggravate meteorological disasters such as acid rain. Therefore, the industrial exhaust gas desulfurization treatment process has always been an important topic of attention in petrochemical industries. [0003] The sulfur-containing waste gas in th...

Claims

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Application Information

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Patent Type & Authority Applications(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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