Suspended bed and fixed bed combined desulfurization technology

Abstract

The invention provides a suspended bed and fixed combined desulfurization technology. A hydrogen sulfide-containing gas and a desulfurization slurry are mixed and then enter a suspended bed reactor from bottom to top, the residence time of the desulfurization slurry in the reactor is controlled to be 5-60 min to ensure full contact of the hydrogen sulfide-containing gas and the desulfurization slurry in order to carry out a reaction, and a gas phase separated after gas-liquid separation of the above obtained reaction mixture enters a fixed bed reactor and undergoes secondary desulfurization toobtain a purified gas. The technology can reduce the sulfur content of the hydrogen sulfide-containing gas to 50 ppm or less from 2.4-140 g / N.m<3> by using the suspended bed, a fixed bed is also usedto further reduce the sulfur content to 10 ppm or less, so the serial connection combination of the suspended bed and the fixed bed realizes high-efficiency desulfurization; and the technology has the advantages of simple and reasonable flow, high desulfurization efficiency, simplicity in required devices, small occupied land and low investment, and is very suitable for industrial promotion.

Description

technical field [0001] The invention belongs to the technical field of desulfurization, and in particular relates to a high-efficiency desulfurization process utilizing a series combination of a suspension bed reactor and a fixed bed reactor. Background technique [0002] H 2 The removal of S, the desulfurization methods that have been industrialized at present are mainly divided into two types: dry method and wet method. [0003] The dry desulfurization process and regeneration method use solid adsorbent to remove hydrogen sulfide and organic sulfur in the gas. The operation is simple and reliable, and the desulfurization purification degree is high. It is suitable for the treatment of low hydrogen sulfide gas. The main desulfurizer is iron oxide, while other desulfurizers such as activated carbon, molecular sieve, manganese oxide, zinc oxide, etc. are more expensive and less used. [0004] Wet desulfurization process and regeneration method can be divided into physical a...

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Problems solved by technology

[0007] The technical problem solved by the present invention is to overcome the defects of low desulfurization efficiency, complex process flow and equipment existing in the existing desulfurization process, and then provide a desulfurization efficiency high, simple process flow, low equipment investment, which can convert the Combined desulfurization process of suspended bed and fixed bed that directly converts hydrogen sulfide into sulfur without secondary pollution

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