Special ultralow-emission desulfurization solvent for SCOT tail gas of sulfur recovery device in oil refinery

A technology for sulfur recovery and oil refinery, which is applied in the direction of gas fuel, petroleum industry, separation methods, etc. It can solve the problems that the extended tail gas treatment process cannot be achieved, and achieve high removal rate and small bubble loss without affecting the service life of the equipment Effect

Pending Publication Date: 2022-05-10
JIANGSU CHUANGXIN PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] All extended tail gas treatment processes cannot reach the level of SO in exhaust tail gas 2 Concentration limit 400mg / m 3 The request must be further processed

Method used

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  • Special ultralow-emission desulfurization solvent for SCOT tail gas of sulfur recovery device in oil refinery
  • Special ultralow-emission desulfurization solvent for SCOT tail gas of sulfur recovery device in oil refinery
  • Special ultralow-emission desulfurization solvent for SCOT tail gas of sulfur recovery device in oil refinery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A special ultra-low emission desulfurization solvent for SCOT tail gas of refinery sulfur recovery unit, which comprises the following components in terms of mass percentage,

[0061] MDEA 95.6%;

[0062] Piperazine 2.4%;

[0063] Water 1.9%;

[0064] Special defoamer for desulfurization agent 0.1%.

[0065] Described MDEA is N-methyldiethanolamine, and its molecular formula is CH 3 N(CH 2 CH 2 Oh) 2 .

[0066] The molecular formula of the piperazine is C 4 h 10 N 2 .

[0067] The special defoamer for desulfurizer is modified simethicone.

[0068] Add MDEA, piperazine, water, and special defoamer for desulfurization agent into the reaction kettle and stir to obtain ultra-low emission desulfurization solvent for SCOT tail gas of refinery sulfur recovery unit.

Embodiment 2

[0070] A special ultra-low emission desulfurization solvent for SCOT tail gas of refinery sulfur recovery unit, which comprises the following components in terms of mass percentage,

[0071] MDEA 95.7%;

[0072] Piperazine 2.3%;

[0073] Water 1.8%;

[0074] Special defoamer for desulfurization agent 0.2%.

[0075] Described MDEA is N-methyldiethanolamine, and its molecular formula is CH 3 N(CH 2 CH 2 Oh) 2 .

[0076] The molecular formula of the piperazine is C 4 h 10 N 2 .

[0077] The special defoamer for desulfurizer is modified simethicone.

[0078] Add MDEA, piperazine, water, and special defoamer for desulfurization agent into the reaction kettle and stir to obtain ultra-low emission desulfurization solvent for SCOT tail gas of refinery sulfur recovery unit.

Embodiment 3

[0080] A special ultra-low emission desulfurization solvent for SCOT tail gas of refinery sulfur recovery unit, which comprises the following components in terms of mass percentage,

[0081] MDEA 95.9%;

[0082] Piperazine 2.1%;

[0083] Water 1.7%;

[0084] Special defoamer for desulfurization agent 0.3%.

[0085] Described MDEA is N-methyldiethanolamine, and its molecular formula is CH 3 N(CH 2 CH 2 Oh) 2 .

[0086] The molecular formula of the piperazine is C 4 h 10 N 2 .

[0087] The special defoamer for desulfurizer is modified simethicone.

[0088] Add MDEA, piperazine, water, and special defoamer for desulfurization agent into the reaction kettle and stir to obtain ultra-low emission desulfurization solvent for SCOT tail gas of refinery sulfur recovery unit.

[0089] The high-efficiency desulfurizer with MDEA as the main agent of the present invention fully demonstrates that its sulfur capacity is large and the advantages of good selectivity, and the existen...

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Abstract

The invention relates to an oil refinery sulfur recovery device SCOT tail gas special-purpose ultralow emission desulfurization solvent, which comprises, by mass, 95.5-96.0% of MDEA (N-methyldiethanolamine), 1.5-2.5% of piperazine, 1.5-2.5% of water, and 0.1-0.3% of a desulfurizer special-purpose antifoaming agent. The desulfurization solvent provided by the invention has high selectivity (good selectivity to HS under high CO2 concentration) and large sulfur capacity, and H2S in the SCOT tail gas after removal can be reduced to 20 ppmv or below.

Description

technical field [0001] The invention relates to a desulfurization solvent, in particular to a special ultra-low emission desulfurization solvent for SCOT tail gas. Background technique [0002] On May 16, 2015, the Ministry of Environmental Protection issued the "Petroleum Refining Industry Pollutant Discharge Standard" (GB31570), which clearly stipulates that sulfur dioxide (SO 2 ) concentration limit is 400mg / m 3 , the emission limit in special areas is 100mg / m 3 ; and stipulate that new enterprises shall implement this standard on July 1, 2015, and existing enterprises shall implement this standard on July 1, 2017. SO stipulated in GB31570 2 The limit value is not only far lower than the 960mg / m stipulated in GB16297 3 (newly established enterprises), and is also lower than the MACT II general standard (714mg / m 3 ). [0003] In order to meet the requirements of this standard, a large number of Claus process sulfur recovery tail gas units built in refineries in my co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14C10L3/10
CPCB01D53/1493B01D53/1468B01D53/1425C10L3/103B01D2252/2053
Inventor 葛晓军黄磊
Owner JIANGSU CHUANGXIN PETROCHEM
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