Delayed coking process and waste gas zero emission treatment method

The invention relates to a delayed coking process and a waste gas zero emission treatment method, and the delayed coking process specifically comprises the following steps: step 1, using residual oil as a raw material, heating the residual oil to a high temperature through a heating furnace, and rapidly transferring the residual oil to a coke tower to carry out a deep thermal cracking reaction; 2, delaying the coking reaction in a coke tower, reducing the coking degree of a furnace tube, and prolonging the operation cycle of the device; 3, fractionating oil gas generated in the coking process from the top of the coke tower to a fractionating tower to obtain coking dry gas, gasoline, diesel oil and wax oil products; and 4, treating the coke left in the coke tower by a decoking system to obtain a coke product. According to the scheme, tail gas recovery can be achieved only by adding two control valves, the tail gas cooling buffer tank and related process pipelines, compared with a newly-built gas holder system,