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Biogas wet catalytic oxidation desulfurization method

A wet catalytic oxidation and biogas technology, applied in the field of biogas desulfurization, can solve the problems of large catalyst consumption, high equipment requirements, shorten regeneration time, etc., achieve good promotion and application value, improve desulfurization efficiency, and reduce operating costs.

Active Publication Date: 2012-02-22
南京碳环生物质科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of large catalyst consumption and high equipment requirements in wet biogas desulfurization, and to invent a biogas wet catalytic oxidation that can effectively improve desulfurization efficiency, shorten regeneration time, and prolong the service life of desulfurization liquid. Desulfurization method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] For the EDTA complexed iron desulfurization liquid containing 0.15mol / L, adopt the desulfurization liquid anti-oxidation improver of 20mmol / L concentration, add in the desulfurization liquid according to the proportion of 0.1% (volume ratio), after purifying hydrogen sulfide content 5000mg / m 3 When using biogas, the daily replacement dosing ratio of desulfurization liquid is reduced from 8.2% to 3.2%, which makes the use time of desulfurization liquid more than doubled. The improver therein can be polyethylene glycol alkyl ether (C 8 ~C 22 , molecular weight between 1000 and 3000), nonylphenol polyoxyethylene ether, glycerin polyoxyethylene ether, butyl hydroxyanisole, dibutyl hydroxytoluene or any mixed solution of several kinds, several kinds of When mixing, the ratio between the components is not required.

Embodiment 2

[0028] For the PDS desulfurization liquid containing 0.21mol / L sulfosalicylic acid complex iron, the desulfurization liquid anti-oxidation improver with a concentration of 0.5mmol / L was added to the desulfurization liquid according to the proportion of 0.05% (volume ratio). Purified hydrogen sulfide content 5000mg / m 3 When using biogas, the daily replacement dosing ratio of desulfurization liquid is reduced from 10.2% to 5.2%, which makes the use time of desulfurization liquid more than doubled. The improver therein can be polyethylene glycol alkyl ether (C 8 ~C 22 , molecular weight between 1000 and 3000), nonylphenol polyoxyethylene ether, glycerin polyoxyethylene ether, butyl hydroxyanisole, dibutyl hydroxytoluene or any mixed solution of several kinds, several kinds of When mixing, the ratio between the components is not required.

Embodiment 3

[0030] For the EDTA complexed iron desulfurization liquid containing 0.35mol / L, adopt the desulfurization liquid anti-oxidation improver of 100mmol / L concentration, add in the desulfurization liquid according to the proportion of 0.08% (volume ratio), after purifying hydrogen sulfide content 5000mg / m 3 When using biogas, the daily replacement dosing ratio of desulfurization liquid is reduced from 7.2% to 2.2%, which prolongs the service time of desulfurization liquid by more than two times. The improver therein can be polyethylene glycol alkyl ether (C 8 ~C 22 , molecular weight between 1000 and 3000), nonylphenol polyoxyethylene ether, glycerin polyoxyethylene ether, butyl hydroxyanisole, dibutyl hydroxytoluene or any mixed solution of several kinds, several kinds of When mixing, the ratio between the components is not required.

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PUM

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Abstract

A biological gas wet catalytic oxidation desulfurization method is characterized in that firstly, an anti-oxidation improver is added to the desulfurization liquid, or the desulfurizer is pre-pressed to form an oxygen-enriched desulfurizer and added to the absorption tower, or the improver and the adder are used at the same time. desulfurization by means of pressure. The invention is beneficial to prolong the service time of the oxidation catalyst, shorten the regeneration and reduction time, improve the desulfurization efficiency and reduce the use cost.

Description

technical field [0001] The invention relates to a method for desulfurizing biogas, in particular to a method for desulfurizing hydrogen sulfide in biogas such as biogas, digested gas, landfill gas, etc., in particular to a method for wet catalytic oxidation desulfurization of biogas. Background technique [0002] As we all know, there is a relatively high concentration of hydrogen sulfide gas in biogas such as biogas, digestion gas, and landfill gas. Because hydrogen sulfide gas is highly corrosive, it will cause corrosion hazards to gas pipelines and equipment, so desulfurization is required deal with. [0003] At present, the commonly used desulfurization methods in industry are wet catalytic oxidation desulfurization, such as complex iron method, PDS method, naphthoquinone method, A.D.A method, DDS method, etc. 2 CO 3 , NaHCO 3 Oxidation catalyst is added to the alkaline desulfurization liquid, and the desulfurization liquid oxidizes hydrogen sulfide into elemental sul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/52B01D53/90
Inventor 吴未立陈泽智王卫兵杨军王慧陈廷超徐明刚王卫星史俊威
Owner 南京碳环生物质科技有限公司