Combined device for catalyzing deep desulfurization of liquefied gas

Abstract

The invention provides a combined device for catalyzing deep desulfurization of liquefied gas. The combined device comprises a hydrogen sulfide removing unit, a stand-by unit, a thioalcohol removing unit, a plurality of pipelines and a plurality of valves, wherein the hydrogen sulfide removing unit is used for removing hydrogen sulfide from catalyzed liquefied gas, the thioalcohol removing unit is used for removing thioalcohol from the catalyzed liquefied gas, the stand-by unit is used for removing the hydrogen sulfide or thioalcohol from the catalyzed liquefied gas, the pipelines and the valves are used in a matched manner, and then, at least two of the hydrogen sulfide removing unit, the stand-by unit and the thioalcohol removing unit can communicate with each other so as to remove the hydrogen sulfide and thioalcohol from the catalyzed liquefied gas. The combined device for catalyzing the deep desulfurization of the liquefied gas can adapt to a variety of abnormal conditions, the capability against fault disturbance is improved, and long-cycle operation is achieved.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a combined device for deep desulfurization of catalyzed liquefied gas. Background technique [0002] In the process of petroleum refining, with the implementation of national V quality upgrading of gasoline, catalytic liquefied gas is used as raw material to produce high-octane gasoline additive MTBE (methyl tert-butyl ether), and the sulfur content in liquefied gas is required to be less than 10mg / kg. Catalytic liquefied gas usually contains sulfides such as hydrogen sulfide, carbonyl sulfide and mercaptan, among which hydrogen sulfide and C 3 The following low-molecular-weight mercaptans are mainly used. If the hydrogen sulfide and mercaptans in the catalytic liquefied gas can be effectively removed, the sulfur content in the liquefied gas can be reduced to below 10mg / kg, which can meet the production of downstream MTBE. [0003] For hydrogen sulfide and mercaptans in ...

AI Technical Summary

Problems solved by technology

[0008] Based on this, it is necessary to solve the problems that MDEA is easy to foam and the fiber membrane is easy to block, which affects the desulfurization effect and long-term operation of the modified alcohol amine dehydrogen sulfide and fiber membrane alkali elution combined device, and provides an adaptable A combination device for catalytic liquefied gas deep desulfurization in various abnormal situations, improving the ability to resist accidents and interference, and realizing the purpose of long-term operation

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