Buffer tank

The utility model provides a buffer tank which comprises a tank body, an assembly pipe vertically arranged above the tank body and a blow-off pipe arranged below the tank body, the assembly pipe and the blow-off pipe are both communicated with the tank body, one end, extending into the tank body, of the assembly pipe is provided with a filtering mechanism, the other end of the assembly pipe is provided with an air outlet pipe, and the air outlet pipe is communicated with the tank body through the assembly pipe; a partition plate is arranged at the position, corresponding to the lower portion of the filtering mechanism, in the tank body, the partition plate divides the tank body into an upper discharging cavity and a lower feeding cavity, and a discharging pipe communicated with the discharging cavity is arranged on the tank body. A flow guide pipe used for communicating the feeding cavity with the discharging cavity is arranged on the side, facing the feeding cavity, of the partition plate, the flow guide pip