A kind of torch gas compression and desulfurization process
A desulfurization process and flare gas technology, which are applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of increasing the operation difficulty of the absorption tower, affecting the desulfurization process, increasing production costs, etc., and reducing operating costs and equipment. Investment, energy consumption reduction, the effect of avoiding sulfur crystallization
Active Publication Date: 2016-08-31
SHANGHAI QIYAO SCREW MACHINERY
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Problems solved by technology
[0008] However, the actual operation still faces the following four main problems: 1. Crystallization of flare gas pipelines and equipment during the compression process
3. High operating costs
The high operating cost is caused by two reasons. One is that to avoid the continuous accumulation of sulfur crystals in the compressor system, the injection fluid (diesel) must be replaced regularly.
Second, frequent downtime maintenance increases production costs
4. Volatile diesel oil affects the subsequent wet desulfurization process
Diesel gas carried by the compressed gas to the subsequent process will increase the operational difficulties of the absorber
Method used
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[0028] A kind of flare gas compression and desulfurization process of the present invention comprises the following steps:
[0029] A. Compression absorption
[0030] Introduce the torch gas into the compressor for compression, and use the alcohol amine solution as the spray liquid at the inlet of the compressor to spray into the cavity of the compressor;
[0031] B. Cooling and separation
[0032] The compressed torch gas is cooled in the gas-liquid cooler, and then enters the three-phase separator for separation; wherein, the hydrocarbon condensate produced after the torch gas is cooled and is immiscible with the alcohol amine solution is separated by the three-phase separator discharge, the H is absorbed in the three-phase separator 2 The alcohol amine-rich liquid of S enters the flash tank, and the flare gas separated by the three-phase separator enters the absorption tower;
[0033] C. to absorb
[0034] The separated flare gas enters the bottom of the absorption towe...
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The invention discloses a flare gas compression and desulphurization technology. The flare gas compression and desulphurization technology comprises the following steps: compression and absorption; cooling separation; absorption; flash evaporation; pregnant solution regeneration. In the step of compression and absorption, an alkanolamine solution is taken as spray liquid at the inlet of a compressor to be sprayed in the cavity of the compressor. After the technical scheme is adopted, acid gas in flare gas is fundamentally absorbed by the alkanolamine solution in the compressor, so that sulfur crystallization during the compression process is effectively avoided; meanwhile, the consumption of the spray liquid in the compression process is reduced, and the load of an absorption tower is decreased.
Description
technical field [0001] The invention relates to a flare gas compression desulfurization process suitable for corrosive gases such as hydrogen sulfide in the oil refining production process. Background technique [0002] Flare gas is the gas released to the flare system for combustion and emission treatment during the refining process. The discharge conditions can be divided into accident conditions and normal conditions. Flare gas is generally composed of hydrogen, light hydrocarbons and air. Affected by crude oil quality and intermediate processing, torch gas contains a small amount of impurities, such as H 2 S and CO 2 . With the strengthening of environmental protection and energy-saving awareness, the sulfur recovery process in oil refining has become an important research topic for all oil refining companies. At present, most of the flare gas treatment process is: compression + wet desulfurization, purified gas after desulfurization To the fuel network, acid gas (H ...
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IPC IPC(8): B01D53/78B01D53/52B01D53/96
Inventor 崔周波连小松顾小欢朱立伟
Owner SHANGHAI QIYAO SCREW MACHINERY