A kind of acid gas reactor and treatment process

Abstract

The invention discloses an acid gas reactor. The reactor comprises a reaction pipeline and a liquid storage tank. One end of the reaction pipeline is a gas phase inlet, and the other end of the reaction pipeline is a gas phase outlet. The reaction pipeline includes more than two stages of reaction sections. The tank is set with the same number of liquid storage areas as the reaction section. Each reaction section is connected to the corresponding liquid storage area through a downcomer. Each reaction section is equipped with an absorption liquid inlet. The reaction pipe between adjacent downcomers is set. There is a partition, and an overflow plate is set on the liquid storage tank between adjacent downcomers. The lower part of each liquid storage area is equipped with a reaction liquid outlet. The reaction liquid outlet is connected to the absorption liquid inlet through a pipeline. The lye inlet is provided on the liquid area. The acid gas treatment method of the present invention uses NaOH solution as an absorption liquid to process acid gas to produce sodium hydrosulfide. Compared with the prior art, the invention achieves the dual goals of purifying acid gas and recycling pollutants.

Description

technical field [0001] The invention relates to an acid gas reactor and a treatment process, which is suitable for the field of acid gas purification, and is especially suitable for the treatment method and device for the purification of sulfur-containing hydrogen compounds and other acid gases and the recycling of pollutants. Background technique [0002] Refinery acid gas mainly comes from sour water stripping, circulating hydrogen desulfurization, dry gas desulfurization and other devices. The acid gas mainly contains H 2 S, CO 2 . At present, the acid gas in most small refineries basically adopts the treatment method of post-combustion emission. On the one hand, this method causes a waste of resources, on the other hand, it brings huge pressure to environmental protection and affects the development space of enterprises. In order to protect the environment and ensure the full utilization of resources, it is imperative to recycle the acid gas from small refineries. ...

AI Technical Summary

Problems solved by technology

[0004] The two-stage Claus + tail gas hydrogenation reduction + solvent absorption technology has mature technology, stable operation, and stable product sulfur quality. However, due to the long process and large investment, the Claus process can only deal with high-concentration acid gases. 2 When the S volume fraction is less than 20%, the device is not easy to operate

This process can only produce 98% industrial sulfuric acid, but cannot produce oleum with higher value. At the same time, due to the difficulty in the transportation and storage of sulfuric acid, the stable market demand near the refinery is an important factor limiting its development.

[0010] CN1836767A discloses a treatment method for sour gas in refineries, utilizing sour gas as the fuel for shaft kilns in cement plants, when the sour gas is burned in the kiln, the H 2 S component reacts chemically with cement material to generate CaSO 4 , other harmful components are also sintered and transformed, which fundamentally solves the problem of acid gas treatment. At the same time, acid gas is used as a gas fuel to make the cement plant energy-saving fuel and achieve the dual purposes of environmental protection and fuel resolution. However, this The method has certain limitations and is not easy to promote

However, the sodium sulfide product of this process is prone to deterioration and is not easy to store

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