Sulfur compound waste gas catalytic incineration method

Abstract

The invention provides a sulfur-containing compound waste gas catalytic incineration method. The method comprises the following steps: sulfur-containing compound waste gas is mixed with air, the mixture enters a catalytic incineration reactor after being preheated and is emitted after the catalytic incineration or emitted after the further desulphurization; wherein, the mixing ratio of the air is controlled to allow the peroxidation coefficient to be not less than 1.0, the preheating temperature is 200 to 300 DEG C, the reaction temperature is 200 to 400 DEG C, and the air speed is 1500 to 15000h<minus 1>. A catalytic incineration catalyst takes silicon dioxide as a carrier, and the active components are vanadium, iron oxide and silver. The method of the invention is applicable to the various sulfur recovery processes and the catalytic incineration treatment of tail gas of a geothermal power plant. The method of the invention with simple flow can effectively process the sulfur-containing compound waste gas with complicated components.

Description

technical field [0001] The present invention relates to a method for catalytic incineration of sulfur-containing compound waste gas, in particular to a catalytic incineration process for sulfur recovery tail gas, which is applicable to various sulfur recovery processes [such as Claus, Super Claus, reduction absorption method (SCOT, SSR), Reduction-absorption-recycling method (RAR), etc.] and catalytic incineration treatment of tail gas from geothermal power plants can convert sulfides such as hydrogen sulfide, carbon disulfide and carbonyl sulfide in the tail gas into sulfur dioxide or sulfur with low odor and toxicity. Background technique [0002] Most of the sulfur in the crude oil processed by the refinery is recovered in the form of elemental sulfur through its sulfur recovery unit. The sulfur recovery process includes the Claus process and the Claus + tail gas deep purification process. Currently, there are 77 sets of sulfur recovery units in China , 51 sets are pure C...

AI Technical Summary

Problems solved by technology

The above two processes adopt open flame direct combustion type preheating, the temperature and explosion-proof control are relatively complicated, the alumina-based catalyst has poor sulfation resistance and short service life

[0029] CN 1410149A discloses an incineration catalyst for hydrogen sulfide in gas and its preparation and use method. The carrier of the catalyst is silicon oxide, the active components are oxides of iron and vanadium, the operating temperature is 250-350°C, and the space velocity is 1000-10000h -1 , the process and catalyst have poor oxidation activity to organic sulfur such as carbonyl sulfide

CN1163785A discloses a catalytic incineration process of hydrogen sulfide in gas, which is suitable for treating Claus tail gas, uses activated carbon as a catalyst, and catalyzes the oxidation of hydrogen sulfide to sulfur dioxide at a temperature of 200-400 ° C; the hydrogen sulfide content is 0.5% ~4% (v / v), water vapor content 4%~30% (v / v), space velocity 3000~10000h -1 , the conversion rate of hydrogen sulfide is 100%, and the production rate of sulfur dioxide is 90% to 99%; the process and catalyst have poor oxidation activity to organic sulfur such as carbonyl sulfide

[0030] The above-mentioned existing sulfur-containing compound exhaust gas catalytic incineration process generally has the disadvantages of complex process, inability to deal with complex component exhaust gas, complex catalyst components and high cost.

Images