Method for removing hydrogen sulfide in gas

A technology for removing gas and hydrogen sulfide, which is applied in chemical instruments and methods, separation methods, and sulfur preparation/purification, etc., and can solve the problems of large volume of desulfurization devices, large solution circulation, and large equipment investment.

Inactive Publication Date: 2017-12-26
HUBEI XUFENG ENVIRONMENTAL TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] With the mining of sulfur-containing oilfield gas and high-sulfur coal mines, the requirements for desulfurization are getting higher and higher; the use of amine method can basically meet the requirements of desulfurization of natural gas and refinery gas, and the Claus device is used for hydrogen sulfide content < 20t / d It cannot operate economically and reliably. The existing conventional liquid-phase redox desulfurization technology has problems such as large desulfurization device volume, large solution circulation volume, and sulfur plugging.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: The hydrogen sulfide in the gas is removed by using the complex iron solvent of the present invention, the gas enters the washing pipe from top to bottom, the desulfurization liquid passes through the nozzle, and is sprayed in reverse direction from bottom to top to the gas, gas-liquid two-phase The medium collides at high speed in the washing pipe. When the momentum of the gas-liquid two-phase medium reaches equilibrium, a highly turbulent foam zone is formed. In this zone, the gas-liquid two-phase not only has a large contact area, but also the contact surface is quickly renewed, so that Enhanced heat transfer and mass transfer efficiency to achieve efficient washing effect. The use of large-diameter nozzles is not prone to sulfur clogging. This process uses the washing technology in the foam area, and does not need to atomize the washing liquid. The nozzle is mainly to ensure that the washing liquid has sufficient flow on the washing pipe plane and is even...

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PUM

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Abstract

A method for removing hydrogen sulfide in gas belongs to the technical field of gas purification. Mainly, the advanced kinetic wave absorber for gas containing hydrogen sulfide removes a large amount of hydrogen sulfide, and a small amount of hydrogen sulfide enters the packed tower for fine desulfurization. The complex iron absorption liquid is used to convert hydrogen sulfide in the gas into sulfide ions during the absorption process; the rich liquid that has absorbed hydrogen sulfide is regenerated by air oxidation to convert sulfide ions into elemental sulfur that is harmless to the environment. The treated gas meets the discharge requirements; the sulfur-containing gas enters the dynamic wave absorber and contacts with the complexed iron desulfurization liquid sprayed from bottom to top to form a stable foam layer. The contact mass transfer efficiency has been significantly improved to achieve rapid absorption of hydrogen sulfide gas, remove most of hydrogen sulfide through dynamic waves, and remove a small amount of hydrogen sulfide in the gas through the packed tower to meet the purification requirements.

Description

technical field [0001] The invention belongs to the technical field of gas purification, and relates to a method for removing hydrogen sulfide from gas. Specifically, the invention is an oxidation-reduction desulfurization method combining dynamic waves and packed towers. Background technique [0002] As we all know, industrial feed gas containing hydrogen sulfide will cause corrosion of pipelines and equipment, catalyst poisoning, and affect product quality; exhaust gas containing hydrogen sulfide will cause serious environmental problems. [0003] The methods for removing hydrogen sulfide mainly include: (1) dry desulfurization, such as iron oxide method, zinc oxide method and activated carbon method. (2) Alcohol amine method. (3) Wet oxidation methods, such as ADA method, tannin extract method, MSQ method, PDS method and complex iron method, etc. (4) Physical solvent methods such as low-temperature methanol method, NHD method, etc. [0004] The wet oxidation method has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/52B01D53/96C01B17/05
CPCB01D53/78B01D53/526B01D53/96B01D2251/304B01D2251/606C01B17/05
Inventor 徐文卿
Owner HUBEI XUFENG ENVIRONMENTAL TECH
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