Natural gas sulfur recovery and catalyst regeneration device and method

Abstract

The invention belongs to the field of petroleum and natural gas engineering, and particularly relates to a device and method for sulfur recovery of natural gas and regeneration of a catalyst. The device comprises a sulfur recovery reactor and a fuel cell, wherein a deposited sulfur outlet of the sulfur recovery reactor is connected with a sulfur separation device through a first pipeline; the sulfur separation device is connected with a liquid storage tank through a second pipeline; the liquid storage tank is connected with a desulfurization catalyst filtrate inlet of the sulfur recovery reactor through a third pipeline; the fuel cell is of an enclosed structure; an outlet of the fuel cell is connected with a regenerated catalyst reflux inlet of the sulfur recovery reactor through a fourth pipeline and an inlet of the fuel cell is connected with a reduced catalyst outlet of the sulfur recovery reactor through a fifth pipeline; and the anode and the cathode of the fuel cell are respectively connected with two ends of the cell through wires. According to the device and the method, the rapid regeneration of a complex iron catalyst in liquid-phase redox engineering is realized, the decomposition of the expensive complex iron catalyst is reduced, the reaction speed in the device is accelerated and the chemical energy is converted into electric energy.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas engineering, and in particular relates to a natural gas sulfur recovery and catalyst regeneration device and method, which are used for gas purification by removing hydrogen sulfide from natural gas. Background technique [0002] H in natural gas 2 S, CO 2 The presence of such acid gases will increase the corrosion of pipelines and equipment, thereby affecting the service life of pipelines. In addition, during the low-temperature separation of natural gas, dry ice may be formed to block pipelines and equipment; it contains more H 2 When the natural gas of S is burned, there will be peculiar smell, and the SO produced by burning 2 Compounds such as sulfur will pollute the environment; in catalytic processing, sulfur-containing hydrocarbons will poison the catalyst. Therefore, the most important task in natural gas pretreatment is the removal of hydrogen sulfide gas. [0003] In the pas...

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Problems solved by technology

[0004] In order to overcome the defects existing in the prior art, the present invention provides a natural gas sulfur recovery and catalyst regeneration device and method, focusing on solving the problem of catalyst decomposition for complex iron liquid-phase oxidation and absorption of hydrogen sulfide gas, so as to improve the oxidation utilization efficiency of the catalyst and Reduce process energy and agent consumption

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