Fine desulfurization device and method for coke oven gas

Abstract

The invention discloses a fine desulfurization device and method for coke oven gas, belonging to the technical field of gas desulfurization. The fine desulfurization device comprises an adsorption tower, a washing tower and a conversion tank, wherein a gas inlet of the adsorption tower communicates with a main gas inlet pipe, and a gas outlet of the adsorption tower communicates with a main purified gas outlet pipe; a gas inlet of the conversion tank communicates with the adsorption tower through a circulating desorbed gas inlet pipe, and a gas outlet of the conversion tank communicates with the adsorption tower through a circulating desorbed gas outlet pipe; a heating device and a desorption fan are arranged on the circulating desorbed gas inlet pipe, and the circulating desorbed gas outlet pipe communicates with the washing tower through a desorbed gas discharge inlet pipe. According to the invention, the continuous working time of the adsorption tower can be effectively prolonged, the efficiency of removing organic sulfur in coke oven gas, blast furnace gas and gasifier gas can be improved while the adsorbent is prevented from being easily blocked and the catalyst is prevented from being easily poisoned, and energy consumption in the whole process is reduced.

Description

technical field [0001] The invention belongs to the technical field of coal gas desulfurization, and more specifically relates to a microcrystalline molecular sieve fine desulfurization device for coke oven gas and a method thereof. The scheme is also applicable to the removal of organic sulfur from complex components of blast furnace gas and gasifier gas. Background technique [0002] The gas used in heating furnaces and boilers in the iron and steel industry mainly comes from coke oven gas produced by coking and blast furnace gas produced by blast furnace smelting. The sulfide content in the gas determines the SO 2 Whether the content can meet the emission standards. After desulfurization and decyanation, the coke oven gas of the iron and steel complex still contains a certain amount of H 2 S and organic sulfur (carbon disulfide, carbon oxysulfide, mercaptan, thioether, thiophene, methyl mercaptan, methyl sulfide, etc.), and a small amount of naphthalene, tar, benzene, am...

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Problems solved by technology

[0011] Aiming at the problems in the prior art that the adsorbent is easily blocked and the catalyst is easily poisoned during the regeneration process of the purification medium, thereby reducing the working efficiency of the adsorption tower, the present invention provides a method that can adapt to coke oven gas, blast furnace gas, and gasifier gas The device and method for removing organic sulfur using a microcrystalline molecular sieve catalyst with complex components adopts the technical solution of the present invention, which can effectively prolong the continuous working time of the adsorption tower, and improve the removal rate of coke oven gas, blast furnace gas, and gasifier gas. At the same time, it can reduce the energy consumption in the whole process while improving the efficiency of organic sulfur

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