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Sulfur recycling process for circularly treating low-concentration acidy gas by utilizing liquid sulfur

A cyclic treatment and sulfur recovery technology, applied in the preparation/purification of sulfur, sulfur compounds, inorganic chemistry, etc., to achieve the effect of high exhaust gas purification rate and low energy consumption

Active Publication Date: 2015-04-22
大连汉诺工程技术有限公司
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Problems solved by technology

Lo-Cat process for H 2 There is no limit to the concentration of S, but water in the acid gas will dilute the chelated iron catalyst solution. In addition, this process cannot convert impurities such as CO and methanol in the acid gas, so the Lo-Cat process also has limitations in the treatment of acid gas with more impurities. sex

Method used

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  • Sulfur recycling process for circularly treating low-concentration acidy gas by utilizing liquid sulfur
  • Sulfur recycling process for circularly treating low-concentration acidy gas by utilizing liquid sulfur
  • Sulfur recycling process for circularly treating low-concentration acidy gas by utilizing liquid sulfur

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Embodiment

[0022] A sulfur recovery process for liquid sulfur recycling to treat low-concentration acid gas, which uses H 2 The volume concentration of S is 5% acid gas and H produced by coal chemical process 2 The acid gas with a volume concentration of S of 15% and an ammonia volume concentration of 18% is subjected to Claus combustion, and the process gas generated by combustion is subjected to a two-stage Claus reaction, and the tail gas produced by the two-stage Claus reaction is Hydrogenation-direct oxidation and wet scrubbing are carried out sequentially to recover sulfur produced in the process of Claus combustion, two-stage Claus reaction and hydrogenation-direct oxidation, as follows:

[0023] The first step: Claus combustion: The difference from conventional Claus combustion is that the liquid sulfur is transported from the liquid sulfur pool to the burner inlet of the sulfur reactor through the liquid sulfur pump, and the liquid sulfur is atomized with nitrogen at the same te...

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Abstract

The invention provides a sulfur recycling process for circularly treating low-concentration acidy gas by utilizing liquid sulfur. The sulfur recycling process is characterized by comprising the following steps: mixing atomized liquid sulfur with a H2S acidy gas generated in a coal chemical process, performing Claus combustion by adopting rich oxidation combustion-supporting or air combustion-supporting, performing two-stage Claus reaction on process gas generated in combustion, performing hydrogenation-direct oxidization and wet-process washing on a tail gas generated by the two-stage Claus reaction in sequence, recycling the sulfur produced in the Claus combustion process, the two-stage Claus reaction process and the hydrogenation-direct oxidization process. The sulfur recycling process can be used for guaranteeing the combustion temperature of the raw material acidy gas with a low heat value, and also can be used for decomposing harmful impurities in the raw material acidy gas.

Description

technical field [0001] The invention relates to a sulfur recovery process for circulating liquid sulfur to treat low-concentration acid gas, which is used for the design of a sulfur recovery device and belongs to the field of sulfur recovery. Background technique [0002] For the treatment of various low-concentration acid gases produced in the coal chemical process, generally containing H 2 The concentration of S is low, such as the acid gas from the low-temperature methanol washing section containing CO 2 High, H 2 S concentration is about 25%, and contains a small amount of methanol, while the acid gas from the phenol ammonia recovery section contains NH 3 , containing H 2 O, H 2 The concentration of S is about 4%. Because the calorific value of these acid gases is very low, even if pure oxygen is added, the temperature of burning ammonia cannot be reached, and the Claus process of the split method cannot be processed. [0003] Currently dealing with H 2 The sulfur ...

Claims

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Application Information

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IPC IPC(8): C01B17/04
CPCC01B17/0408C01B17/0495
Inventor 田晓良
Owner 大连汉诺工程技术有限公司
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