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.