The invention belongs to the technical field of coking, and discloses a
coke tower vent gas recycling method, which comprises the following steps that 1, after reaction of a
coke tower is finished, vent gas is introduced into an emptying
tower, and the emptying tower performs gas-liquid separation on the vent gas; 2, the separated liquid enters an oil liquid
recovery tank, and the separated gas enters a
water washing tower; 3, the gas entering the
water washing tower is subjected to
water washing by using the water washing tower to remove
hydrogen sulfide and part of impurities; and 4, the washed gas is introduced into a fractionating tower to remove water drops entrained in the gas, and then the gas is introduced into a
gas compressor. According to the
coke tower vent gas recycling method, the vent gas is recycled, the coke tower vent gas has the advantages of being high in heat value, large in flow and the like, is stable in pressure, and can be easily merged into a
fuel gas pipe network, and after the vent gas is recycled, enough
fuel gas amount can be provided for the
fuel gas pipe network, so that the use amount of liquefied gas of the fuel gas
pipe network is reduced, and the purposes of saving energy, reducing consumption, improving quality and improving efficiency are achieved.