Device for recovering semi-coke heat discharged from retort furnace

The utility model relates to a device for recovering semi-coke heat discharged from a retort furnace. The device is characterized in that a plurality of upright decorated walls are arranged at the lower part of the retort furnace, a coke discharge passage is formed between every two decorated walls, a cold gas passage is arranged at the hollow part of each decorated wall, and cold gas injection holes are formed on two sides of each decorated wall; and the outside of the cold gas passage is connected with a cold gas access pipe, a cold gas connecting pipe, a gas fan and a gas holder in sequence. The temperature of semi-coke discharged from the retort furnace can be reduced to 250-300 DEG C from 500-550 DEG C, the recovered heat is used for supplementing the heat required for dry distillation, and the heat consumption of the retort furnace is reduced.