Hot-soda washing desulfurization method

A technology of hot alkali washing and alkali washing tower, which is applied in the petroleum industry, the processing of gas mixture, and the treatment of hydrocarbon oil, etc. It can solve the problems of high environmental protection pressure, low regeneration efficiency of alkali liquor, and poor separation effect of liquid hydrocarbon and alkali liquor, etc. question

Active Publication Date: 2008-12-10
CHINA PETROLEUM & CHEM CORP +1
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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 reg

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Embodiment 1

[0032] The hot alkali elution desulfurization method of the present invention is applied in a liquefied gas desulfurization device of an oil refinery.

[0033] (1) hot alkali elution sulfur: flow is that the liquefied gas 2 of 43t / h enters from the bottom of alkali washing tower 11, and flow is that 6t / h lye (15% by weight aqueous sodium hydroxide solution) 1 enters from the top of alkali washing tower Enter, the operating temperature is 550°C, the operating pressure is 1.5MPa, liquid-liquid reverse contact desulfurization, various forms of sulfur in the liquefied gas are converted into sulfides, and these sulfides are dissolved in the alkali solution;

[0034] (2) lye settlement and separation: the lye-containing liquefied gas 4 coming out from the top of the alkali washing tower 11 is connected with the lye settling tower 12, and the liquefied gas and the sulfide-containing lye residence time in the settling tower are about 2h, so that hydrocarbons and Sulphide-containing ly...

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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...

Claims

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Application Information

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IPC IPC(8): C10G70/00
Inventor 程建民李东风戴伟过良
Owner CHINA PETROLEUM & CHEM CORP
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