Method and device for synchronously removing H2S, CO2 and SO2 from sulfur-containing mixed gas

A mixed gas, SO2 technology, applied in chemical instruments and methods, separation methods, air quality improvement and other directions, can solve problems such as difficulty in removing hydrogen sulfide, achieve strong flexibility, improve desulfurization capacity, and the effect of a simple and reasonable process

Inactive Publication Date: 2011-07-13
江苏中显集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, so far, it is difficult to remove hydrogen sulfide in the mixed gas no matter which common method is u

Method used

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  • Method and device for synchronously removing H2S, CO2 and SO2 from sulfur-containing mixed gas
  • Method and device for synchronously removing H2S, CO2 and SO2 from sulfur-containing mixed gas
  • Method and device for synchronously removing H2S, CO2 and SO2 from sulfur-containing mixed gas

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A simultaneous removal of H from sulfur-containing mixed gas 2 S, CO 2 and SO 2 method, first using lime aqueous solution to remove CO in the mixed gas 2 and SO 2 , and separated out as a precipitate, and then use caustic soda solution to remove H 2 S and the remaining small amount of CO 2 and SO 2 , and after the catalyst reaction, the final H 2 S is converted into sulfur foam products. In this method, two detergents are compounded and used in one process, and the mixed gas that can be treated can have high or low content of acidic components. Among them, the removal of H 2 The alkali washing process of S can be combined with the catalytic oxidation method, and can also be combined with the circulation absorption method. The desulfurization waste lye can be used as a supplementary alkali source for the distillation of residual ammonia and fixed ammonium decomposition.

Embodiment 2

[0021] Such as figure 2 Shown is the two-tower special-purpose device of the present invention. The special device includes a combined washing tower, a lime water circulation tank 1, a caustic soda solution circulation tank 9, a filter 12, a rich liquid tank 5, a regeneration tower 7 and a liquid level regulator 8; the lime water circulation tank 1 passes through the lime water inlet pipe Road 14 and limewater outlet pipeline 15 communicate with the combined washing tower, and limewater circulation pump 2 is arranged on the limewater inlet pipeline 14; Described caustic soda solution circulation tank 9 communicates with the combined washing tower through the barren liquid pipe 16, in A lean liquid pump 10 is provided on the lean liquid pipe 16; a rich liquid pipe 17 communicates with the rich liquid tank 5 on the joint washing tower, and the rich liquid tank 5 communicates with the regeneration tower 7 through the regeneration pipe 18, and the regeneration pipe 18 is provide...

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Abstract

The invention discloses a method and a device for synchronously removing H2S, CO2 and SO2 from a sulfur-containing mixed gas. The method comprises: firstly, removing the CO2 and SO2 in the mixed gas by using lime water solution and separating out precipitates; secondly, removing the H2S and the small amount of residual CO2 and SO2 by using caustic soda solution, and reacting in the presence of a catalyst; and finally, converting the H2S into sulfur bubble product. The special device comprises a combined washing tower, a lime water circulating tank, a caustic soda solution circulating tank, a filter, an enriched liquid tank, a regeneration tower, a liquid level regulator and other equipment. In the invention, the sulfur dioxide and carbon dioxide are removed first, then the hydrogen sulfide is removed, the alkaline solution used for removing the hydrogen sulfide is solution of sodium hydroxide, and the sodium hydroxide forms sodium carbonate after the carbon dioxide is absorbed so the absorbing capacity is improved.

Description

technical field [0001] The invention relates to a method for desulfurizing sulfur-containing mixed gas, in particular to a method for simultaneously removing H in sulfur-containing mixed gas 2 S, CO 2 and SO 2 method and device thereof. Background technique [0002] For the treatment of sulfur-containing mixed gas and waste gas in various industrial furnaces containing hydrogen sulfide components, catalytic oxidation method, or cycle absorption method, or dry method is generally used to absorb and remove hydrogen sulfide, such as PDS method and HPF method , Takahax naphthoquinone method, F.R.C picric acid method and other catalytic oxidation methods; AS ammonia water desulfurization method, vacuum potassium carbonate method, monoethanolamine method and other cyclic absorption methods; dry desulfurization methods such as granular activated carbon or iron oxide. For components containing sulfur dioxide, ammonia water method or lime water method is generally used to absorb s...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50B01D53/52B01D53/62
CPCY02C10/04Y02A50/20Y02C20/40
Inventor 袁长胜崔平张超群
Owner 江苏中显集团有限公司
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