Method for removing hydrogen sulfide in gas phase through oxidization under high gravity field

Abstract

The invention discloses a method for removing hydrogen sulfide in a gas phase through oxidization under a high gravity field, which comprises the steps of: enabling a desulfurizing agent to be in a countercurrent or cross current contact with a hydrogen sulfide containing gas in a desulfurizing high gravity machine; and then adding the desulfurizing agent rich in sulphur in a sulphur sedimentation agent and then enabling the desulfurizing agent added with the sulphur sedimentation agent to be in a countercurrent or cross current contact with air in a regeneration high gravity machine, whereinthe desulfurizing agent is a mixed solution consisting of complex iron, aqueous alkali, a sulphur modifying agent and a defoaming agent, and in the mixed solution, the concentration of iron ions is 0.1-10g / L, pH is 8.0-9.2, the concentration of the sulphur modifying agent is 10-200ppm, and the concentration of the defoaming agent is 5-50ppm. The high gravity machine is used for replacing the traditional low-transfer-efficiency reactor, and a high gravity rotary packed bed reactor is adopted during hydrogen sulfide oxidization and catalyst regeneration, thus process transfer efficiency is greatly strengthened, and time of oxidization desulfurization and regeneration of a desulfurizing agent is shortened; in addition, the sedimentation agent is adopted in a sulphur sedimentation stage and acts together with the sulphr modifying agent, thus the sulphur sedimentation time is also greatly shortened.

Description

technical field [0001] The invention relates to a gas purification method, in particular to a method for oxidizing and removing hydrogen sulfide in the gas phase under a supergravity field. Background technique [0002] Hydrogen sulfide (H 2 S) is a toxic and harmful gas. It is an industrial waste gas produced with industrial production. It comes from oil refineries, natural gas purification plants, petrochemical plants, gas purification plants, nitrogen fertilizer plants, smelters, paper mills, printing and dyeing plants, Tannery, pesticide factory and other industries. The presence of hydrogen sulfide in the gas can produce various harmful effects. For example, oil and gas pipelines are broken due to the long-term corrosion of hydrogen sulfide acid; also, in the ammonia synthesis industry, the presence of hydrogen sulfide poisons industrial catalysts. Containing 0.10% hydrogen sulfide in the air will cause poisoning symptoms such as headache and dizziness, and excessive...

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Problems solved by technology

Chinese patent 200310101838.1 reports a method for absorbing and removing hydrogen sulfide and dust in gas with a high-gravity rotating bed and organic amines, but does not involve the subsequent regeneration of organic amines

Chinese patent 200710101508.0 reports a method for natural gas supergravity dehydrogenation. This patent uses supergravity rotating packed bed to replace the absorption tower based on the traditional organic amine absorption desulfurization process, but the regeneration time is long and the sulfur separation equipment is huge.

Utility model patent 200620023555.9 reports a device for removing hydrogen sulfide from gas by supergravity. The regeneration equipment is huge and inefficient, and an external demister is used

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