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Starting method of sulfur recovery process

A sulfur recovery and process technology, which is applied in the start-up process of the sulfur recovery process, and the field of sulfur recovery and start-up with low acid gas concentration at the initial stage of the start-up, can solve the problem of high organic sulfur content

Active Publication Date: 2021-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
  • Application Information

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Problems solved by technology

[0008] For this reason, the technical problem to be solved by the present invention is to provide a method for starting the sulfur recovery process, which can solve the problem of organic sulfur content caused by low-concentration acid gas that cannot be processed at the initial stage of operation and directly burned by torch or introduced into the sulfur furnace of the sulfur recovery device. high thus affecting flue gas SO 2 The problem of emission is to ensure that the sulfur recovery device discharges up to the standard during the whole start-up process, the operation is simple, and no secondary pollution is caused. SO 2 Significant emission reduction, widely used in petroleum refining, natural gas purification and coal chemical industry sulfur recovery device and start-up process

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  • Starting method of sulfur recovery process

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Effect test

Embodiment 1

[0064] A 150,000-ton / year sulfur plant starts construction, and the start-up method is as follows: the acid gas generated by the upstream device is directly introduced into the absorption tower 14, that is, the line 1 is opened, the line 2 is closed, the temperature at the top of the absorption tower 14 is controlled to 35°C, and the incinerator 16 is ignited. , the incinerator adopts natural gas combustion to heat up, and the heating rate is 15°C / h. 2 When the S concentration reaches 6g / L, establish an amine liquid circulation regeneration system, control the temperature at the top of the regeneration tower 15 to 112°C, and the temperature at the bottom of the tower at 117°C, and the regenerated acid gas enters the acid gas buffer tank 18; when the buffer tank pressure reaches 20Kpa , start the liquid sulfur injector, the inert gas is used as power to carry the liquid sulfur into the sulfur furnace 1, and the air is distributed according to the complete combustion of the liqui...

Embodiment 2

[0079] A certain 80,000 tons / year sulfur plant starts construction, and the start-up method is as follows: after the upstream device produces acid gas, it is directly introduced into the absorption tower, the stage opens line 1 and closes line 2, the temperature at the top of the absorption tower is controlled at 25°C, the incinerator is ignited, and the incinerator The temperature is raised by natural gas combustion, and the heating rate is 10°C / h. When detecting and absorbing H in the tower amine liquid 2 When the S concentration reaches 8g / L, establish an amine liquid circulation regeneration system, control the temperature at the top of the regeneration tower to 115°C, and the temperature at the bottom of the tower at 120°C, and the regenerated acid gas enters the acid gas buffer tank; when the pressure of the buffer tank reaches 40Kpa, start Liquid sulfur injector, the inert gas is used as power to carry liquid sulfur into the sulfur furnace, and the air is distributed acc...

Embodiment 3

[0086] A 100,000-ton / year sulfur plant is started, and the start-up method is as follows: after the upstream device produces acid gas, it is directly introduced into the absorption tower, that is, line 1 is opened, line 2 is closed, the temperature at the top of the absorption tower is controlled at 30°C, the incinerator is ignited, and the incinerator adopts The temperature is raised by natural gas combustion, and the heating rate is 25°C / h. When detecting the absorption of H in the tower amine liquid 2 When the S concentration reaches 5g / L, establish an amine liquid circulation regeneration system, control the temperature at the top of the regeneration tower to 110°C, and the temperature at the bottom of the tower at 115°C, and the regenerated acid gas enters the acid gas buffer tank; when the pressure of the buffer tank reaches 35Kpa, start Liquid sulfur injector, the inert gas is used as power to carry liquid sulfur into the sulfur furnace, and the air is distributed accord...

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Abstract

The invention belongs to the technical field of sulfur recovery, and particularly relates to a starting method of a sulfur recovery process. According to the starting method of the sulfur recovery process, during starting, acid gas is introduced into an absorption tower for enrichment, absorption and regeneration, and liquid sulfur is introduced into a sulfur production furnace for reaction; the regenerated acid gas can be mixed with SO2 generated by the reaction at any position, such as behind the sulfur production furnace, behind a waste heat boiler, in front of a first-stage heater and in front of a first-stage reactor, for subsequent reaction; and when the acid gas is stable and the system load meets the requirement, introduction of the liquid sulfur is stopped, and the acid gas is directly introduced into the sulfur production furnace for direct reaction, so that the device can perform normal production. The method can solve the problem that the emission of flue gas SO2 is influenced by high organic sulfur content caused by the fact that low-concentration acid gas cannot be treated and is directly combusted through a torch or is introduced into a sulfur production furnace of a sulfur recovery device in the initial starting stage, and ensures that emission of the sulfur recovery device reaches the standard in the whole starting process.

Description

technical field [0001] The invention belongs to the technical field of sulfur recovery, and specifically relates to a sulfur recovery process start-up process suitable for petroleum refining, coal chemical industry, and natural gas purification industries, and is particularly suitable for a sulfur recovery start-up method with low acid gas concentration in the initial stage of start-up. Background technique [0002] Sulfides in crude oil or coal will be converted into highly toxic substance H during processing 2 S, which is extremely toxic to the human body and the environment, must be treated in a harmless manner, and the most suitable process is the sulfur recovery process. Sulfur recovery refers to the chemical process of converting sulfide in toxic sulfur-containing gases such as hydrogen sulfide into elemental sulfur, thereby turning waste into treasure and protecting the environment. In a chemical plant using coal as raw material, the acid gas processing and recovery ...

Claims

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Application Information

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IPC IPC(8): C01B17/04B01D53/18B01D53/14B01D53/78B01D53/50F23G7/06F23G5/50
CPCC01B17/0408C01B17/0434C01B17/0452C01B17/0413B01D53/18B01D53/1468B01D53/78B01D53/507F23G7/06F23G5/50B01D2258/0283Y02P20/129
Inventor 刘增让刘剑利刘爱华徐翠翠陶卫东许金山吕才山常文之
Owner CHINA PETROLEUM & CHEM CORP
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