Process for Reducing SO2 Emission Concentration from Sulfur Recovery Unit
A technology of emission concentration and sulfur recovery, which is applied in the direction of sulfur preparation/purification, can solve the problems of sulfur recovery and emission not up to standard, achieve the effect of reducing the size of pipelines and equipment, and reducing the gas volume of the process
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Embodiment 1
[0046] process such as figure 1 As shown, it includes thermal reaction stage, catalytic reaction stage and exhaust gas purification treatment stage.
[0047] 1) Thermal reaction stage:
[0048] Contains H 2 S: 90 (v / v)% acid gas (1) is partially combusted into SO in the reactor (2) 2 , at the furnace combustion temperature of 1250°C, H 2 S and SO 2 A Claus reaction occurs to generate elemental sulfur and reaction furnace tail gas (20), the elemental sulfur condenses and enters the liquid sulfur pool (11) to recover liquid sulfur, and the reaction furnace tail gas (20) enters the catalytic reaction stage. Reactor tail gas (20) volume content of sulfur compounds is: H 2 S: 8.1%, SO 2 : 4.0%, organic sulfur: 0.4%.
[0049] 2) Catalytic reaction stage:
[0050] Reactor tail gas (20) enters the primary converter (3) in the catalytic reaction stage (reaction conditions: temperature 300°C, space velocity 800h -1 ), react under the action of catalyst to generate elemental sul...
Embodiment 2
[0056] Except following difference, other is with embodiment 1.
[0057] 1) Thermal reaction stage:
[0058] Contains H 2 S: 82 (v / v)% acid gas (1) is partially combusted into SO in the reactor (2) 2 .
[0059] Reactor tail gas (20) volume content of sulfur compounds is: H 2 S: 6.2%, SO 2 : 3.3%, organic sulfur: 0.3%.
[0060] 2) Catalytic reaction stage:
[0061] Primary converter (3) (reaction conditions: temperature 310°C, space velocity 800h -1 ), secondary converter (4) (reaction conditions: temperature 240°C, space velocity 800h -1 ). The catalyst loading scheme is to fill the upper part of the primary converter and the secondary converter with a half-height LS-981 multi-functional sulfur recovery catalyst with oxygen leakage function, and the lower part is filled with a half-height LS-02 large specific surface area oxidation catalyst Aluminum based sulfur recovery catalyst. Claus tail gas (5) sulfur compound volume content is: H 2 S: 1.3%, SO 2 : 0.5%, organ...
Embodiment 3
[0065] Except following difference, other is with embodiment 1.
[0066] 1) Thermal reaction stage:
[0067] Contains H 2 S: 52 (v / v)% acid gas (1) is partially combusted into SO in the reactor (2) 2 .
[0068] Reactor tail gas (20) volume content of sulfur compounds is: H 2 S: 5.1%, SO 2 : 2.4%, organic sulfur: 0.3%.
[0069] 2) Catalytic reaction stage:
[0070] Primary converter (3) (reaction conditions: temperature 310°C, space velocity 800h -1 ), secondary converter (4) (reaction conditions: temperature 240°C, space velocity 800h -1 ).
[0071] Claus tail gas (5) sulfur compound volume content is: H 2 S: 1.2%, SO 2 : 0.4%, organic sulfur: 0.06%.
[0072] 2) Exhaust gas purification treatment stage:
[0073] Amine liquid absorbs H in hydrogenation tail gas 2 S, make the H in the purified tail gas (9) 2 The S content was reduced to 7ppm(v).
[0074] The amine liquid absorbing hydrogen sulfide enters the regeneration tower (13) for regeneration, and the acid g...
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