Conveying system for low-flash-point, volatile and flammable liquid-diethylamine

The conveying system comprises an underground storage tank, a U-shaped pipeline, a pneumatic diaphragm pump and a controller, one end of the U-shaped pipeline is connected to the outlet end of the underground storage tank, the other end of the U-shaped pipeline is connected with the pneumatic diaphragm pump, the other end of the pneumatic diaphragm pump is connected with a stainless steel wire hose, and the controller is connected with the controller. A pneumatic pressure release valve is connected between the U-shaped pipeline and the stainless steel wire hose; and the controller is electrically connected with the pneumatic pressure release valve and the pneumatic diaphragm pump. According to the utility model, the pneumatic pressure release valve is arranged, so that the problem of gasification and pressure boosting of low-flash-point, volatile and flammable liquid is effectively avoided, and the problem that the diaphragm pump cannot be started due to the fact that the pressure in the pump cavity is higher