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Method for removing hydrogen sulfide from industrial gas in recycling way

An industrial gas, hydrogen sulfide technology, applied in chemical instruments and methods, separation methods, manganese sulfate and other directions, can solve the problems of large heat consumption and sulfuric acid, waste of resource utilization, etc., to achieve high utilization rate of manganese, less secondary pollution, Effects with low taste requirements

Active Publication Date: 2011-02-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional method of using pyrolusite as a raw material to produce manganese sulfate needs to consume a large amount of heat and sulfuric acid, which is a waste from the perspective of resource utilization.

Method used

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  • Method for removing hydrogen sulfide from industrial gas in recycling way
  • Method for removing hydrogen sulfide from industrial gas in recycling way
  • Method for removing hydrogen sulfide from industrial gas in recycling way

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The waste gas treated in this embodiment is hydrogen sulfide-containing waste gas from coking chemical industry, and the amount of waste gas to be treated is 6000Nm 3 / h, the main composition of exhaust gas is: H 2 S 30%, CO 2 65%, N 2 4%. The technological process of this embodiment is as attached figure 2 shown. First, the pyrolusite powder and water are prepared in the slurry tank equipped with agitator to make a slurry with a liquid-solid ratio (mass ratio) of 3:1, and the slurry is pumped into the desulfurization reactor from the inlet by the slurry pump. Start the main blower set at the rear end of the combustion furnace, so that the combustion furnace is in a negative pressure state, including H 2 The exhaust gas and air of S are sucked into the combustion furnace by negative pressure through the pipeline to burn together, and the combustion temperature is controlled at about 1000°C. Combustion produces SO 2 The high-temperature furnace gas enters the w...

Embodiment 2

[0034] The waste gas treated in this embodiment is hydrogen sulfide-containing waste gas from coking chemical industry, and the amount of waste gas to be treated is 6000Nm 3 / h, the main composition of exhaust gas is: H 2 S 30%, CO 2 65%, N 2 4%. The technological process of this embodiment is as attached figure 1 shown. First, the pyrolusite powder and water are prepared in a slurry tank equipped with a stirrer to make a slurry with a liquid-solid ratio (mass ratio) of 5:1, and the slurry is driven into the desulfurization reactor from the inlet by a slurry pump. Start the main blower set at the rear end of the combustion furnace, so that the combustion furnace is in a negative pressure state, including H 2 The exhaust gas and air of S are sucked into the combustion furnace by negative pressure through the pipeline to burn together, and the combustion temperature is controlled at about 700°C. Combustion produces SO 2 The high-temperature furnace gas enters the heat e...

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Abstract

The invention discloses a method for removing hydrogen sulfide from an industrial gas in a recycling way. The method mainly comprises the following steps of: feeding the hydrogen sulfide-containing industrial gas and air into a burning furnace to burn at the temperature of between 600 and 1,200 DEG C so as to obtain sulfur dioxide-containing high-temperature furnace gas; cooling the sulfur dioxide-containing high-temperature furnace gas to not more than 80 DEG C and humidifying; feeding the humidified and cooled sulfur dioxide-containing furnace gas into a pyrolusite pulp absorption system todirectly contact the furnace gas with the pyrolusite pulp for absorption reaction so as to generate manganese sulfate-containing absorption tail solution; performing full absorption reaction and solid-liquid separation, wherein the obtained liquid phase is manganese sulfate-containing aqueous solution; and adding an impurity removing agent to react and then performing solid-liquid separation, wherein the obtained liquid phase is solution of manganese sulfate which is further processed. By implementing the method, the hydrogen sulfide can be removed and recovered from the industrial gas in a recycling way, the pollution of the hydrogen sulfide to atmosphere is reduced and controlled, the comprehensive utilization added value of the pyrolusite is improved, and meanwhile, the method has the characteristics of high sulfur-removing effect, high manganese utilization rate and light secondary pollution.

Description

technical field [0001] The invention relates to a method for removing hydrogen sulfide (H) in industrial gases based on pyrolusite as an absorbent 2 S) method, for recovering hydrogen sulfide (H in industrial gas) 2 S) and the development and utilization of pyrolusite are a method for recycling sulfur resources and comprehensively utilizing manganese resources. Background technique [0002] Hydrogen sulfide (H 2 S) industrial gas is a harmful gas, hydrogen sulfide (H 2 The existence of S) will not only cause equipment and pipeline corrosion, catalyst poisoning, but more seriously threaten personal safety, which is one of the environmental pollutants that must be eliminated or controlled. About the hydrogen sulfide (H 2 For the removal of S), many treatment methods have been developed at home and abroad. These methods can be divided into two categories: wet method and dry method. Among them, wet method includes absorption method and wet oxidation method; dry method includ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10B01D53/52B01D53/80B01D53/76
CPCY02P20/129
Inventor 苏仕军丁桑岚
Owner SICHUAN UNIV
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