Method for obtaining high-purity sulphur from Claus reactive tail-gases

A Claus tail gas, Claus reaction technology, applied in separation methods, chemical instruments and methods, sulfur preparation/purification, etc., can solve the problems of insufficient hydrogen and large hydrogen sources, and reduce process design and process. steps, cost reduction, effect of reducing the amount of additional equipment
CN101693164AInactive Publication Date: 2010-04-14邵志辉
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
邵志辉
Publication Date
2010-04-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for obtaining high-purity sulphur from Claus reactive tail-gases, which belongs to the technical field of environmental protection. The method comprises steps as follows: (1) Claus tail-gas is preheated to reach the temperature between 160 DEG C to 300 DEG C; (2) the preheated gas enters a reduction reaction furnace filled with selective reaction catalysts to perform reduction reaction; (3) liquid sulphur is separated out of the reacted process gas via a condenser; (4) the process gas performs direct oxidization reaction inside a direct oxidizing reactor after being compensated with oxygen and preheated again; (5) liquid sulphur is separated out of gas on an outlet of the reactor via a sulphur condenser and a separator, tail gases after burned are cooled, washed by using an alkaline liquor and then discharged. The method overcomes the shortcoming that sulphur can not be produced by a traditional tail-gas hydrogenation reactor, improves total recovery efficiency of sulphur in a single process, and has the advantages of saving energy, lowering H2 consumption amount, reducing volume of absorption towers, decreasing arranged devices, lowering manufacturing cost and reducing operating load of the overall set of devices.
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Description

technical field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for obtaining high-purity sulfur from Claus tail gas. Background technique

[0002] Sulphides in crude oil or coal are converted to H during processing 2 S, and H 2 S is a highly toxic substance, which has a great poisonous effect on the human body and the environment. It must be treated in a harmless manner. The most suitable process is the sulfur recovery process. The acid gas in the refinery mainly comes from catalytic dry gas desulfurization, coking dry gas desulfurization, sewage gas stripping tower gas, hydrotreating unit desulfurization and other devices.

[0003] The main processing flow of sour gas in refineries is: sulfur in crude oil → petroleum processing (atmospheric and vacuum) → gasoline\kerosene\diesel →hydrofining→H 2 S→sulfur recovery→sulfur;

[0004] In a chemical plant using coal as raw material, the sour gas processin...

Claims

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