Fine desulfurization system forcoke oven gas

Abstract

The invention discloses a fine desulfurization system for coke oven gas. The fine desulfurization system comprises a first filter, a gas holder, a compressor, a second filter, a coarse desulfurization tank, a heater, a pre-hydrogenation reactor, a primary hydrogenation reactor, a fine desulfurization tank and a cooler, wherein the first filter is used for filtering tar in the coke oven gas; the compressor is used for compressing coke oven gas; the second filter is used for filtering tar fog drops in the coke oven gas; the coarse desulfurization tank is used for carrying out inorganic sulfur desulfurization treatment on coke oven gas, and the heater is used for heating the coke oven gas; the pre-hydrogenation reactor is used for carrying out hydro-conversion on coke oven gas to carry out organic sulfur desulfurization treatment; the primary hydrogenation reactor is used for carrying out hydro-conversion on the coke oven gas again to carry out secondary desulfurization treatment on organic sulfur; the fine desulfurization tank is used for carrying out inorganic sulfur desulfurization treatment on the coke oven gas again; and the cooler is used for cooling coke oven gas. Therefore, the impurity sulfur in the coke oven gas can be fully treated, so that the final coke oven gas can meet the desulfurization index.

Description

technical field [0001] The invention relates to the technical field of desulfurization of coke oven gas, in particular to a fine desulfurization system of coke oven gas. Background technique [0002] Coke oven gas is a by-product of the coking industry. It refers to a flammable gas produced by coking coal prepared from several kinds of bituminous coal, and after high-temperature dry distillation in the coke oven, while producing coke and tar products. The calorific value of coke oven gas is about half of that of natural gas (17~19MJ / Nm 3 ), the density is about 0.45~0.48kg / Nm 3 . Coke oven gas contains a certain amount of hydrogen (H 2 ), carbon monoxide (CO) and methane (CH 4 ), etc., and due to the different coking ratio and operating process parameters, the composition of coke oven gas changes slightly. The raw coal gas produced by the coke oven needs to be purified first to remove tar, sulfur, ammonia, benzene, etc. before being used as coke oven gas for subsequent ...

AI Technical Summary

Problems solved by technology

However, the composition of coke oven gas is very complex, in addition to the effective components, it also contains a variety of impurity components

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