MBR (Membrane Bioreactor) flat membrane supporting plate with gradually increased sectional areas of diversion trenches

The utility model relates to an MBR (Membrane Biological Reactor) flat sheet membrane support plate with a diversion trench with gradually increased sectional area, which comprises a frame, a filter plate, a water outlet pipe, the diversion trench and a hollow water flow collecting groove, the filter plate is embedded in the frame, the water outlet pipe is inserted and fixed at the upper end part of the frame, and the diversion trench is arranged in the hollow water flow collecting groove; the flow guide groove and the hollow water flow collecting groove are respectively formed in the surface of one side of the filter plate, the periphery of the flow guide groove is respectively communicated with the hollow water flow collecting groove, and the upper end part of the hollow water flow collecting groove is communicated with the lower end of the water outlet pipe; the cross sectional area of the flow guide groove is gradually reduced in the vertical downward direction; the cross sectional area of the diversion t