Gas-water mixing countercurrent filter

The invention discloses a gas-water mixing countercurrent filter and relates to the technical field of water treatment. The gas-water mixing countercurrent filter comprises a separation tank, an exhaust pipe is arranged on the upper part of the separation tank, a water outlet pipe is arranged on the lower part of the separation tank, a filter packing layer is arranged in the separation tank, and the filter packing layer takes a super-hydrophobic material as filter packing; and a water distributor is arranged above the filter packing layer, the water distributor is connected with a liquid inletpipe, a gas distributor is arranged below the filter packing layer, and the gas distributor is connected with a gas inlet pipe. Compared with the prior art, the gas-water mixing countercurrent filterhas the following advantages: gas-water countercurrent percolation and flotation reagent assisted reaction boxes are integrally arranged through a countercurrent interface membrane of gas and water;gas flotation, percolation