Device and method for removing hydrogen sulfide with gas-phase material liquid membrane bed

Abstract

The invention discloses a device and a method for removing hydrogen sulfide with a gas-phase material liquid membrane bed, and relates to the technical field of hydrogen sulfide removal from gas-phasematerials. The device for removing hydrogen sulfide from the gas-phase material liquid membrane bed comprises the liquid membrane bed and a filler tower, distributors and atomizing nozzles are arranged in the liquid membrane bed and the filler tower to primarily distribute an amine liquid; the amine liquid is allowed to form an amine liquid membrane on the surface of cellosilks through fiber bundles in the liquid membrane bed and a filler in the filler tower, amine droplets are formed on the surface of the filler, and thus the amine liquid and a dry gas material are completely contacted, thehydrogen sulfide absorption efficiency of the amine liquid in the dry gas material is substantially improved, and on the premise of assurance of the desulfurization requirement, the amine liquid circulation flow can be reduced by 50%, and the corresponding desulfurization cost can be reduced by 50%.

Description

Technical field [0001] The invention relates to the technical field of hydrogen sulfide removal from gas phase materials, and in particular to a device and method for hydrogen sulfide removal in a liquid film bed of gas phase materials. Background technique [0002] Gas-phase materials such as natural gas and shale gas extracted from oil and gas fields, dry gas and fuel gas produced by oil refinery installations, and circulating hydrogen in hydrogenation equipment generally contain hydrogen sulfide. The low hydrogen sulfide content is several thousand mg / m³, and the highest can reach several. Ten thousand mg / m³. [0003] At present, sieve trays or packed towers are commonly used in gas-phase material hydrogen sulfide removal devices. The process generally adopts N-methyldiethanolamine (MDEA) amine liquid extraction and absorption process. The temperature of amine liquid to absorb hydrogen sulfide is generally 30-45°C. The rich amine solution after hydrogen sulfide is heated to 120...

AI Technical Summary

Problems solved by technology

[0004] However, due to the low mass transfer efficiency of the sieve plate tower or packed tower, the amine liquid absorbs hydrogen sulfide efficiently, and the hydrogen sulfide content in the rich amine liquid is only 2-5g / L, which is far from the saturated concentration of hydrogen sulfide in the amine liquid of 20- 30g / L, but in the case of low efficiency of amine liquid to absorb hydrogen sulfide, to achieve the purpose of desulfurization, it is necessary to increase the circulating flow rate of amine liquid, and the greater the circulating flow rate of amine liquid, the greater the energy consumption of amine liquid regeneration heating and cooling The higher the gas phase material desulfurization cost, the higher the corresponding cost

Aiming at the problems of low efficiency of amine liquid in absorbing hydrogen sulfide in gas phase material in the prior art, large circulation flow rate of amine liquid, high energy consumption cost of regeneration heating and cooling of amine liquid, a device and method for dehydrogen sulfide of gas phase material with high efficiency and low cost are very necessary

Images