Coking residual sludge treatment method

The invention discloses a coking residual sludge treatment method, and relates to the technical field of coking waste water treatment. According to the method, residual sludge with the moisture content being 98-99% is directly discharged into a mixed sludge tank from a biochemical system, and then discharged into a mixed sludge well from the tank bottom and pumped into a sludge dewaterer through amixed sludge pump by means of a sludge flow meter; meanwhile, a metering pump pumps a PAM solution with the concentration being 0.1% from a water treatment solution tank, the PAM solution enters a sludge flow meter rear pipeline, and the PAM solution is mixed with residual sludge and then enters the sludge dewaterer; dewatering is conducted until dewatered sludge with the moisture content being 70-80% falls into a dewatered sludge buffer tank, separated sewage automatically flows into a separation sewage tank through a separation sewage discharge pipe; an electric gate at the bottom of the dewatered sludge buffer tan