A cycle to remove h 2 s and so 2 And the method of recovering sulfur

Abstract

The invention discloses a cyclic removal of H 2 S and SO 2 And the method for recovering sulfur belongs to the fields of energy saving, emission reduction and gas purification. The method of the present invention will H 2 S or SO 2 with the absorbed SO into the column 2 or H 2 The organic base-solvent reaction of S will also be absorbed by the regenerated organic base and the unused organic base in the process, and the regenerated organic base and unused organic base will absorb H 2 S or SO 2 After solid-liquid separation in the separation tower, it can directly enter the next reaction absorption tower for use. The invention enables the traditional high-temperature gas phase Claus process to be realized under the condition of mild liquid phase, which not only breaks through the heat balance limitation of high temperature on the Claus reaction, thereby improving the conversion rate; 2 S and SO 2 There is the problem of high desorption energy consumption and serious loss of absorbent; secondly, this method performs absorption and reaction in a single device, which is more in line with the concept of green chemistry.

Description

technical field [0001] The invention relates to a cyclic removal of H 2 S and SO 2 And the method for recovering sulfur belongs to the fields of energy saving, emission reduction and gas purification. Background technique [0002] h 2 S is a poisonous and harmful acid gas with a strong pungent smell, which exists in large quantities in the desulfurization process of oil refineries and natural gas plants, while SO 2 It is also a pungent smell and corrosive acid gas, which exists in large quantities in coal-fired enterprises. h 2 S and SO 2 They will also exist in coalbed methane at the same time, and they will cause serious pollution to the atmospheric environment, so they must be captured and purified to meet the national emission standards before they can be discharged. Currently H 2 S and SO 2 It is mainly concentrated and captured by organic amine absorbent, and then desorbed at medium temperature and sent to the next process for utilization. This process has the...

AI Technical Summary

Problems solved by technology

This process has the problem of serious volatilization loss of absorbent and high energy consumption, while for H 2 The utilization of S is to carry out the Claus reaction to convert sulfur into simple substance. The traditional gas-phase Claus reaction needs to first concentrate and trap a part of the H 2 High temperature oxidation of S to SO 2 Then carry out the reaction under the condition of catalyst and high heat. The high heat condition will not only bring about the problem of high energy consumption, but also inhibit the exothermic reaction of the Claus process, resulting in low conversion rate, so that the final tail gas Fine desulfurization process is required, the whole process is complex and cumbersome, and the process is long

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