Hot-soda washing desulfurization method

Abstract

The present invention discloses a method for desulfurating by thermokalite washing, belonging to the desulfuration technical field. In order to solve the problems that the prior art is inconspicuous in desulfuration effect, not good in separation effect of liquid hydrocarbon and alkali liquor, low regeneration efficiency of alkali liquor, large in environment protection pressure, etc., a liquid-liquid converse thermokalite washing tower is adopted for removing the sulfur in liquefied gas by thermokalite at a higher temperature, an alkali liquor sedimentation tower is adopted for separating the alkali liquor and the liquefied gas, and then related equipment such as an alkali liquor regeneration tower, etc. is adopted for removing sulfide from a system. The method improves the operating temperature of the alkaline tower, quickens the conversion rate of sulfur in various forms, and can convert the sulfur in various forms in the liquid hydrocarbon into sulfide or disulphide, etc.; The titanium, cyanine and cobalt catalysts are omitted, and thus the cost of the catalyst is economized; the liquid hydrocarbon come out from the alkaline tower enters an alkali liquor knockout tower, the staying time is increased, and thus the effect of separation of the liquefied gas from the alkali liquor is better.

Description

technical field [0001] The invention relates to a method for desulfurizing liquefied gas, in particular, the invention relates to a method for removing sulfur in liquefied gas by using hot alkali to elute. Background technique [0002] Crude oil contains toxic and harmful sulfur compounds in different forms, and these sulfur compounds will enter into petroleum products during petroleum refining. If these sulfides are not removed, people will cause serious pollution to the surrounding environment when they use petroleum products. With the deep exploitation of domestic oilfields, the quality of domestic crude oil has deteriorated and the sulfur content has increased, while imported crude oil is mostly high-sulfur crude oil. Therefore, in the deep processing of crude oil, sulfide pollution has become increasingly serious, which has become a major problem for refiners to solve. Environmental issues. [0003] As crude oil becomes heavier and people's demand for light fuels cont...

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Problems solved by technology

[0015] The purpose of the present invention is to solve the deficiencies of the prior art, such as inconspicuous desulfurization effect, poor separation effect of liquid hydrocarbon and lye, low regeneration efficiency of lye, high environmental protection pressure, etc., and proposes to use hot alkali without catalyst Sodium hydroxide solution and liquefied gas contact desulfurization method

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