Combined treatment method for waste gas containing sulfur compounds

A treatment method and compound technology, applied in chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve the problems of large air resistance in the catalytic incineration reactor bed, complex catalyst components, complex process, etc., and reach the service life Long life, excellent performance and low catalyst cost

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above-mentioned existing sulfur-containing compound waste gas treatment methods generally have one or more of complex processes, large air resistance in the bed of the catalytic incineration reactor, low operating space velocity, complex catalyst components used, poor sulfur resistance, and high cost. Several deficiencies, in addition, the sulfur dioxide that generates does not do further processing in the prior art

Method used

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Embodiment 1

[0027] Such as figure 1 As shown, the exhaust gas of sulfur-containing compounds is mixed with air, and enters the catalytic incineration reactor after preheating. The feed gas composition is 0.2% (v / v) of hydrogen sulfide, 0.05% (v / v) of carbonyl sulfide, and 3.0% of water vapor (v / v), oxygen 0.75% (v / v), and the rest is nitrogen. The catalyst used in catalytic incineration uses honeycomb ceramics as the carrier, and the active component weight content is Bi 2.5%, Cu 1.5%, TiO 2 3.0%, the Cu / Bi molar ratio is about 2:1, and the specific surface area is 1900m 2 / m 3 , the average pore size is 4.6nm, the reaction temperature is 350°C, and the space velocity is 6000h -1 , the flue gas formed after catalytic incineration enters the absorption tower after heat exchange and cooling. The pH of the absorption liquid used in the absorption tower is 8, the concentration of sodium ions is 2 mol / liter, and the liquid-gas ratio to the flue gas is 3L / m 3 , the reflux ratio (i.e. the per...

Embodiment 2

[0029] Such as figure 1 As shown, the exhaust gas of sulfur-containing compounds is mixed with air, and enters the catalytic incineration reactor after preheating. The feed gas composition is 0.24% (v / v) of hydrogen sulfide, 0.06% (v / v) of carbonyl sulfide, and 3.0% of water vapor (v / v), oxygen 0.90% (v / v), and all the other being nitrogen, the composition of catalyst used by catalytic incineration is La 2 o 3 3.2% (La 2.7%), Bi 2 o 3 4.5% (Bi 4.0%), TiO 2 92.8%, the La / Bi molar ratio is about 1:1, the reaction temperature is 350°C, and the space velocity is 6000h -1 , the flue gas formed after catalytic incineration enters the absorption tower after heat exchange and cooling. The pH of the absorption liquid used in the absorption tower is 9, the concentration of sodium ions is 0.5 mol / liter, and the liquid-gas ratio to the flue gas is 5L / m 3 , the reflux ratio (i.e. the percentage of the regeneration circulation amount to the total circulation amount) of the absorption l...

Embodiment 3

[0031] Such as figure 1 As shown, the exhaust gas of sulfur-containing compounds is mixed with air, and enters the catalytic incineration reactor after preheating. The feed gas composition is 0.21% (v / v) of hydrogen sulfide, 0.07% (v / v) of carbonyl sulfide, and 3.0% of water vapor. (v / v), oxygen 0.84% ​​(v / v), the rest is nitrogen, the composition of the catalyst used for catalytic incineration is CuO 2.9%, Bi 2 o 3 8.6%, TiO 2 88.5%, the Cu / Bi molar ratio is about 1:1, the reaction temperature is 320°C, and the space velocity is 6000h -1 , the flue gas formed after catalytic incineration enters the absorption tower after heat exchange and cooling. The pH of the absorption liquid used in the absorption tower is 8, the concentration of sodium ions is 3 mol / liter, and the liquid-gas ratio to the flue gas is 4L / m 3 , the reflux ratio (i.e. the percentage of the regeneration circulation amount to the total circulation amount) of the absorption liquid entering the regeneration t...

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Abstract

The invention discloses a combined treatment method for waste gas containing sulfur compounds. The method comprises the following steps of: mixing the waste gas containing the sulfur compounds and air, delivering the preheated gas to a catalytic incineration reactor, and performing catalytic incineration operation at the temperature of between 150 and 450 DEG C under the conditions that the space velocity is 1,000 to 35,000h<-1> and the peroxide coefficient is 0.5 to 8.0; delivering the flue gas formed after catalytic incineration to an absorption tower after heat exchange and cooling, discharging the desulfurized and washed purified flue gas, delivering the desulfurized and washed slurry to a regeneration tank provided with a stirring device, performing regeneration reaction on the slurry and regeneration alkali, delivering the reaction product to a sedimentation tank, overflowing the clarified liquid in the sedimentation tank to a pre-pumping tank, recycling the alkali supplemented clarified liquid to a desulfurization tower, and regularly clearing the settled calcium sulfite, calcium sulfate and calcium carbonate. By the method, hydrogen sulfide and organic sulfides in the waste gas containing the sulfur compounds can be efficiently converted into sulfur dioxide, and the sulfur dioxide is recycled.

Description

technical field [0001] The invention relates to a combined treatment method for sulfur-containing compound waste gas, which is suitable for the treatment of various sulfur-containing compound waste gases such as hydrogen sulfide, carbon disulfide and carbonyl sulfide, and can convert the above-mentioned sulfide into sulfur dioxide or sulfur dioxide with low odor and toxicity. Sulfur, and further recovery of sulfur dioxide, this method is especially suitable for the treatment of sulfur recovery Claus process tail gas and geothermal power plant waste gas. Background technique [0002] Hydrogen sulfide and organic sulfides (such as carbon disulfide, carbonyl sulfide, etc.) are a class of odorous pollutants with varying degrees of toxicity to the human body, mainly from industrial exhaust gases such as oil refining, natural gas, chemical industry, sewage treatment, and geothermal power generation. Pollutant discharge standard (GB 14554-93) strictly limits its discharge. Taking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/48B01D53/78C04B11/26
Inventor 马荣华李凌波
Owner CHINA PETROLEUM & CHEM CORP
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