Delayed coking device

The utility model provides a delayed coking device. The delayed coking device mainly comprises a heating furnace, a shallow thermal cracking reactor, a gas-liquid separation tank, coking towers and a fractionating tower, wherein the discharging port of a convection section of the heating furnace is connected with the charging port of the shallow thermal cracking reactor, the discharging port of the shallow thermal cracking reactor is connected with a charging port in the middle part of the gas-liquid separation tank, an oil gas outlet in the top of the gas-liquid separation tank is connected with a charging port in the lower side face of the fractionating tower, and a discharging port in the bottom of the gas-liquid separation tank is connected with the charging port of a radiation section of the heating furnace; a discharging port pipeline of the radiation section of the heating furnace is divided into two paths, one path is connected with bottom charging ports of the coking towers, and the other path is connected with top charging ports of the coking towers through a four-way valve; top oil gas outlet pipelines of the coking towers are connected with the charging port in the lower side face of the fractionating tower, and a discharging port in the bottom of the fractionating tower is connected with the charging port in the middle part of the gas-liquid separation tank. The delayed coking device has the advantages that inlet materials of the heating furnace can be subjected to modification, the operating cycle of the heating furnace is prolonged, the vibration of the coking towers is mitigated or eliminated, and the yield of liquid products is increased.