Delayed coking feeding heat exchange system

The utility model provides a delayed coking feeding heat exchange system. The system comprises a raw oil buffer tank, a heating furnace feeding buffer tank, a raw oil heat exchange pipeline, a wax oilheat exchange pipeline and a first heat exchanger, wherein the raw oil heat exchange pipeline is communicated with the raw oil buffer tank and the heating furnace feeding buffer tank so as to conveyraw oil from the raw oil buffer tank to the heating furnace feeding buffer tank; the inlet end of the wax oil heat exchange pipeline and the outlet end of the wax oil heat exchange pipeline are both communicated with an oil collecting tank of the fractionating tower, so that wax oil in the oil collecting tank of the fractionating tower circularly flows along the wax oil heat exchange pipeline; thefirst heat exchanger is communicated with the raw oil heat exchange pipeline and the wax oil heat exchange pipeline so that raw oil and wax oil can exchange heat in the first heat exchanger. Therefore, when the feed quantity o