The application discloses a
methanol unloading
system, which comprises a liquid inlet pipeline, a liquid outlet pipeline, an unloading pump, a gas-liquid separation tank and a
backflow pipeline; the liquid outlet end of the unloading pump is communicated with the gas-liquid separation tank through an exhaust pipeline; the gas-liquid separation tank is communicated with the liquid inlet end of the unloading pump through the
backflow pipeline; a
backflow valve is arranged at the connection position of the backflow pipeline and the gas-liquid separation tank; the
system further comprises a liquid pumping pump, a liquid pumping inlet
pipe and a liquid pumping outlet
pipe; the liquid pumping inlet
pipe is communicated between the backflow pipeline and the liquid inlet end of the liquid pumping pump; the liquid pumping outlet pipe is communicated between the liquid outlet end of the liquid pumping pump and the liquid outlet pipeline; a liquid pumping
inlet valve is arranged on the liquid pumping inlet pipe; the
system further comprises a backflow bypass pipeline, one end of the backflow bypass pipeline is communicated with the backflow pipeline and is provided with a
bypass valve, and the end is located between the liquid pumping
inlet valve and the backflow valve; the other end of the backflow bypass pipeline is communicated with the end of the backflow pipeline close to the unloading pump. By adding the additional liquid pumping pipeline and the liquid pumping pump, the dynamic change of the unloading working condition and the safety requirement can be adapted.