Acid gas vertical reactor and processing method

Abstract

The invention discloses an acid gas vertical reactor, in which more than two reaction zones are provided. A buffer zone is arranged under the most front reaction zone and is provided with an acid gas inlet and a generated liquid outlet; and a purified gas outlet and an alkali liquid inlet are disposed on the last reaction zone. Each reaction zone includes a liquid receiving tray, a connecting tube and a rain cap, wherein the two adjacent reaction zones are separated through the liquid receiving tray. The connecting tube is arranged at the center of the reactor axially and passes through the liquid receiving tray vertically. The two adjacent reaction zones are communicated by the connecting tube. The rain cap is arranged over the connecting tube. Each reaction zone is provided with an absorption liquid inlet and a reaction liquid outlet which are connected to each other through a pipeline. In the acid gas processing method, a NaOH solution is employed as an absorption liquid to treat the acid gas and to produce sodium hydrosulfide. Compared with a reactor in the prior art, the acid gas tubular reactor achieves both acid gas purification and pollutant recycling.

Description

technical field [0001] The invention relates to an acid gas vertical reactor and a treatment method, which are suitable for the field of acid gas purification, and are 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 refin...

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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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