The invention discloses a coking
tail gas treatment method and a coking
tail gas treatment device. A purpose of the invention is to solve the problems of secondary
pollution and the like caused by vapor and malodorous gas
pollution and
tail gas VOC and
coke powder discharge along with tail gas of the
coke pool and the
coke powder of the existing delayed coking device. According to the device, cokepool tail gas, coke
tower discharge steam, coke
tower tail gas and tail gas generated by other equipment in a coking device enter the gas-liquid separation section of a tail gas treatment
tower and are subjected to gas-liquid separation; the gas-phase coking tail gas rises to a desulfurization section and is in countercurrent contact with an absorption liquid entering from the upper portion of the desulfurization section so as to be desulfurized; the desulfurized coking tail gas continuously rises to reach a desaturation section; after desaturation, the tail gas is discharged from the top ofthe tail gas treatment tower, VOC is removed, and then the tail gas is emptied; the rich absorption liquid is pumped out, pressurized and returned to the upper portion of the desulfurization section;after failure, the waste liquid is externally sent to a
treatment unit; and the washing water containing
solid particles in the tail gas treatment tower enters a
settling section downwards, the washing
sewage containing
solid particles comes out from the bottom of the tail gas treatment tower, and the clarified washing water comes out from a washing
water pumping hopper at the lower portion of thetail gas treatment tower and is pressurized so as to be recycled as circulating washing water.comes out from the top of the tail gas treatment tower, VOC is removed, and then the tail gas is emptied;the rich absorption liquid is pumped out, pressurized and returned to the upper portion of the desulfurization section; after failure, the waste liquid is sent to a
treatment unit; and the washing water in the tail gas treatment tower flows out downwards from the bottom of the tail gas treatment tower, one part is discharged out of the device, and the other part is pressurized and then recycled as circulating washing water.