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Method for recycling sulfur from acid gases containing hydrogen sulfide

A technology of acid gas and hydrogen sulfide, applied in chemical instruments and methods, separation methods, preparation/purification of sulfur, etc., can solve the problems of low conversion rate of sulfur, achieve high purity, convenient daily maintenance, and less equipment structure

Inactive Publication Date: 2010-08-04
北京至清时光环保工程技术有限公司
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: for the H in acid gas in the prior art 2 When the volume concentration of S is 1% to 15%, the technical problem of low sulfur conversion rate in the application of Clinsulf-DO process; provide a method for recovering sulfur from acidic gas containing hydrogen sulfide with high sulfur conversion rate

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  • Method for recycling sulfur from acid gases containing hydrogen sulfide
  • Method for recycling sulfur from acid gases containing hydrogen sulfide
  • Method for recycling sulfur from acid gases containing hydrogen sulfide

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Embodiment Construction

[0025] The method for recovering sulfur from acidic gas containing hydrogen sulfide of the present embodiment comprises the following steps: (a) Air supply: Utilize an air blower to introduce air from the outside into the air preheater 1, and preheat the air through the air preheater 1 Heat to 240°C to form preheated air; (b) acid gas pretreatment: acid gas is introduced into acid gas separator 3, and the liquid droplets carried by acid gas are separated, and the separated acid gas separator 3 comes out The acid gas enters the acid gas preheater 4 and is heated to 240° C. by medium-pressure steam; (c) mixing: the ratio of the amount of hydrogen sulfide to the amount of oxygen is calculated according to the ratio of 2: 1, and the The preheated air in the air preheater 1 and the acid gas preheated to 240°C in the acid gas preheater 4 are passed into the static mixer 5 to be fully mixed to form process gas; the flow rate of the air is determined by the acid gas The flow rate of t...

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Abstract

The invention relates to a method for recycling sulfur from acid gases containing hydrogen sulfide, comprising the following steps: (a) air supply; (b) acid gas pretreatment; (c) mixture; (d) primary direct catalytic oxidation; (e) primary sulfur condensation; (f) process gas reheating; (g) secondary direct catalytic oxidation; (h) secondary sulfur condensation; (i) sulfur re-separation; (j) degasification in a liquid sulfur tank; and (k) tail gas burning. When the volume concentration of H2S in the acid gases in the prior art is 1-15%, the recycle rate of sulfur can reach over 99% by the method of the invention, and the emission load of H2S in the acid gases processed by the method of the invention meets the emission requirement of Integrated Emission Standard of Air Pollutants (GB16297-1996).

Description

technical field [0001] The invention relates to a sulfur recovery process, in particular to a process for recovering sulfur from acid gas containing hydrogen sulfide. Background technique [0002] According to my country's energy structure, my country is a country that is short of oil and gas and relatively rich in coal. Among the proven energy reserves, 96% are coal, and oil and gas resources only account for about 4% of the total. Coal is the main source of energy in my country. At present, the number of methanol and synthetic ammonia projects using coal as raw material is increasing to alleviate the pressure of lack of oil and gas resources. According to China's "Medium and Long-Term Development Plan for the Coal Chemical Industry" (draft for comments), by 2010, 2015 and 2020, the annual output of coal-to-olefins will be 1.4 million tons, 5 million tons and 8 million tons respectively, and 1 ton of olefins Can consume 3 tons of methanol. As a country with large coal re...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/52C01B17/04
CPCY02A50/20Y02P20/129
Inventor 周琪马健张晓刚陈灵
Owner 北京至清时光环保工程技术有限公司
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