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Method for decreasing flue gas SO2 emission concentration of sulphur apparatus

A sulfur plant, SO2 technology, applied in the direction of sulfur preparation/purification, etc., can solve the problems of increasing process gas volume, increasing pipeline and equipment size, pipeline and equipment corrosion, etc.

Active Publication Date: 2016-02-03
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The existing sulfur recovery technology can meet the GB16297-1996 "Comprehensive Emission Standard of Air Pollutants", but cannot meet the requirements of the new environmental protection standard that will be implemented in 2014
Existing liquid sulfur degassing technology The stripping gas for liquid sulfur degassing is usually air, steam, Claus tail gas and nitrogen. Steam is easy to cause corrosion of pipelines and equipment, and external gas supply sources will increase the gas volume of the process gas, thereby increasing pipelines and equipment. Size; H contained in Claus tail gas 2 S will dissociate H from liquid sulfur 2 S approaches equilibrium, liquid sulfur cannot satisfy H 2 The index requirement of S is less than 10ppm
The existing liquid sulfur degassing treatment adopts incinerator incineration technology, and the waste gas contains H 2 Sulfur-containing substances such as S and sulfur steam are directly introduced into the incinerator for treatment, and the sulfur-containing substances are burned and converted into SO 2 , so that the flue gas SO 2 Emission concentration increased by 100-300mg / m 3 , unable to meet the upcoming emission standards

Method used

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  • Method for decreasing flue gas SO2 emission concentration of sulphur apparatus
  • Method for decreasing flue gas SO2 emission concentration of sulphur apparatus
  • Method for decreasing flue gas SO2 emission concentration of sulphur apparatus

Examples

Experimental program
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Effect test

Embodiment 1

[0059] process such as figure 1 shown. The process includes thermal reaction section, catalytic reaction section and tail gas purification treatment section.

[0060] In the thermal reaction section, the acid gas 1 containing 94 (v / v)% hydrogen sulfide is partially burned in the reactor 2 and converted to sulfur dioxide. At a high temperature of 1260°C, hydrogen sulfide and sulfur dioxide undergo a Claus reaction to generate elemental sulfur and reactor tail gas. 20. After being cooled by the primary condenser 17 (outlet temperature 166°C), the elemental sulfur enters the liquid sulfur pool 11 to obtain liquid sulfur. The volume content of the reaction furnace tail gas 20 sulfur-containing compounds is: H 2 S: 8.12%, SO 2 : 4.03%, organic sulfur: 0.48%.

[0061] Reactor tail gas 20 enters the primary converter 3 of the catalytic reaction section (reaction conditions: temperature 312°C, space velocity 800h -1 ) and secondary converter 4 (reaction conditions: temperature 24...

Embodiment 2

[0064] process such as figure 2 shown. The process includes thermal reaction section, catalytic reaction section and tail gas purification treatment section.

[0065] In the thermal reaction section, the acid gas 1 containing 94 (v / v)% hydrogen sulfide is partially burned in the reactor 2 and converted to sulfur dioxide. At a high temperature of 1260°C, hydrogen sulfide and sulfur dioxide undergo a Claus reaction to generate elemental sulfur and reactor tail gas. 20. After being cooled by the primary condenser 17 (outlet temperature 166°C), the elemental sulfur enters the liquid sulfur pool 11 to obtain liquid sulfur. The volume content of the reaction furnace tail gas 20 sulfur-containing compounds is: H 2 S: 8.12%, SO 2 : 4.03%, organic sulfur: 0.48%.

[0066] Reactor tail gas 20 enters the primary converter 3 of the catalytic reaction section (reaction conditions: temperature 312°C, space velocity 800h -1 ) and secondary converter 4 (reaction conditions: temperature 2...

Embodiment 3

[0069] process such as image 3 shown. The process includes thermal reaction section, catalytic reaction section and tail gas purification treatment section.

[0070] In the thermal reaction section, the acid gas 1 containing 94 (v / v)% hydrogen sulfide is partially burned in the reactor 2 and converted to sulfur dioxide. At a high temperature of 1260°C, hydrogen sulfide and sulfur dioxide undergo a Claus reaction to generate elemental sulfur and reactor tail gas. 20. After being cooled by the primary condenser 17 (outlet temperature 166°C), the elemental sulfur enters the liquid sulfur pool 11 to obtain liquid sulfur. The volume content of the reaction furnace tail gas 20 sulfur-containing compounds is: H 2 S: 8.12%, SO 2 : 4.03%, organic sulfur: 0.48%.

[0071] Reactor tail gas 20 enters the primary converter 3 of the catalytic reaction section (reaction conditions: temperature 312°C, space velocity 800h -1 ) and secondary converter 4 (reaction conditions: temperature 24...

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Abstract

The present invention pertains to the the technical field of sulfur recovery, particularly relates to a method for decreasing flue gas SO2 emission concentration of a sulphur apparatus. In the method, a desulfurizing agent used in a tail gas purifying stage is a highly pure and efficient composite desulfurizing agent, and the content of hydrogen sulfide in the purified gas is less than 50 ppm. Liquid sulfur degassing manner of a sulfur recovery apparatus adopts bubbling degassing, wherein the gas used in bubbling is purified gas, hydrogen sulfide content of which is less than 50 ppm, on the top of an absorption tower in the sulphur apparatus, and the H2S in the liquid sulfur can be removed until less than 10 ppm. After extracting the exhaust gas subjected to liquid sulfur degassing and then mixing the exhaust gas with a reaction furnace tail gas, the exhaust gas is introduced into a primary condenser to subject to sulfur recovery treatment, or the exhaust gas is mixed with the tail gas in a primary converter and introduced into a secondary condenser to subject to sulfur recovery treatment, or the exhaust gas is mixed with Clause tail gas and introduced into a tertiary condenser to subject to treatment; and finally, the flue gas SO2 emission concentration of the sulphur apparatus can be reduced to be lower than 100 mg / m<3>, so that the real problem that the emission of the existing sulphur apparatus does not meet the new emission standards is solved.

Description

technical field [0001] The invention belongs to the technical field of sulfur recovery, in particular to a method for reducing SO in flue gas from a sulfur device. 2 method of emission concentration. Background technique [0002] SO 2 It is one of the most important environmental pollutants and the main cause of acid rain. SO 2 It can destroy the physiological functions of plants, slow down the growth of crops and forests, and the human body can inhale high concentrations of SO 2 Gas, will have a strong stimulating effect on the respiratory tract, so SO 2 As the main air pollutant emission control technology has been widely valued. In recent years, SO 2 The discharge has caused 40% of my country's land area to be harmed by acid rain, and the annual loss caused by it is as high as 110 billion yuan. According to the current emission control level, by 2020, the SO emissions from the petroleum refining industry 2 It will reach 126993t / a. Therefore, control pollution, re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/04
Inventor 刘爱华刘剑利陶卫东刘增让徐翠翠张艳松张玉红
Owner CHINA PETROLEUM & CHEM CORP