Filling method for sulfur recycled catalyst with high content of CO2 in raw material gas to be treated

Abstract

The invention relates to a filling method for sulfur recycled catalyst with a high content of CO2 in a raw material gas to be treated, which belongs to the method of preparing sulfur from a sulfur compound in a gaseous state of sulfides in the gaseous state. By the adoption of a two-stage sulfur preparation and conversion process, multi-functional sulfur recycled catalyst with high hydrolysis activity of organic sulfur is filled at the height from one thirds to a half in the upper part of the first-stage converter, and alumina base sulfur recycled catalyst with a large ratio surface is filled at the height from two thirds to a half in the lower part of the first-stage converter; the second-stage converter is totally filled with alumina base sulfur recycled catalyst with the large ratio surface. According to the filling method for sulfur recycled catalyst with the high content of CO2 in the raw material gas to be treated, the hydrolysis activity of sulfur is increased, and the Claus activity can be maintained high, the gas volume of CO2 in the raw material gas to be treated is as high as 50 percent, the total sulfur conversion rate of the sulfur recycle device can reach above 96 percent, and the service life of the catalyst can reach more than six years. The filling method provided by the invention is suitable for the sulfur recycling devices of facilities in petroleum refining and production, coal chemical industry and natural gas purifying.

Description

technical field [0001] The invention is a method for CO in raw gas to be treated 2 The filling method of the sulfur recovery catalyst with relatively high content. A method for preparing sulfur from gaseous sulfur-containing compounds including gaseous sulfides. It is suitable for the recovery of elemental sulfur in the desulfurization section of petroleum refining and natural gas processing equipment. Background technique [0002] There is more or less a certain amount of CO in the acid gas of the sulfur recovery unit 2 Gas, CO in the acid gas of some sulfur recovery units 2 The gas content is high, up to 50% by volume. For example, the natural gas in Sinopec Puguang Gas Field contains 10% to 15% (v) H 2 S, 6% ~ 10% (v) CO 2 , natural gas needs to be desulfurized and decarbonized, and the tail gas after desulfurization and decarbonization is used as the acid gas of the sulfur recovery unit, which makes the CO in the acid gas 2 The content is relatively high, and the ...

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Problems solved by technology

[0003] Chinese patent CN200810238373.7 discloses a method for selecting and filling sulfur-making catalysts. This method belongs to the field of sulfur recovery in the rubber additives industry. Three-stage sulfur-making reactors are set up, and the sulfur-making catalysts are filled separately. The upper part of the converter is filled with 1m 3 PSR-41, lower filling 2m 3 PSR-31; the upper part of the secondary converter is filled with 1.1m 3 PSR-41, lower filling 2.1m 3 PSR-31; the upper part of the three-stage converter is filled with 1.6m 3 PSR-41, lower filling 1.6m 3 PSR-31, the PSR-31 catalyst used in this filling method is a titanium-based catalyst, which has the disadvantages of high wear and poor strength, which affects the smooth operation of the device

Among them, the upper part of the first-stage Claus reactor is filled with leakage oxygen protection type sulfur recovery catalyst, and the lower part is filled with TiO 2 Sulfur recovery catalyst; secondary Claus reactor loading aid type sulfur recovery catalyst; selective hydrogenation reduction reactor loading SO 2 Selective reduction catalyst that converts SO 2 Selectively reduced to elemental sulfur, the leak "O 2 "The protective sulfur recovery catalyst has poor organic sulfur hydrolysis ability and low strength. It is easy to pulverize in the later stage of device operation, and the catalyst deactivates quickly, which also affects the smooth operation of the device.

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