Coke discharging process of semi-coke

The invention relates to a novel coke discharging process of semi-coke. According to the coke discharging process of the semi-coke, two coke discharging valves, namely an upper coke discharging valve and a lower coke discharging valve are utilized, wherein each coke discharging valve has a gas locking function, a cooling type coke extractor is arranged between the two coke discharging valves, and the cooling type coke extractor is provided with a water-cooled jacket and a nitrogen gas seal. The coke discharging valve on the upper portion of the cooling type coke extractor is a multi-sectional lattice type spiral coke discharging valve where coke can be discharged continuously and uniformly, the coke discharging valve on the lower portion of the cooling type coke extractor is a lattice type material feeding valve, and a chain type conveyor below the cooling type coke extractor is provided with an enclosed type shell structure. The system of the coke discharging process of the semi-coke is good in overall gas l