Counter-mixing Fenton fluidized bed

A counter-mixing Fenton fluidized bed mainly comprises a reaction tank body, a Fenton reaction area is arranged in the reaction tank body, a water inlet for introducing sewage and reaction agents is formed in the upper portion of the reaction tank body, and a water outlet is formed in the tank wall on the other side as high as the water inlet. A first circulating port and a second circulating portwhich are as high as the water inlet are formed in the left side and the right side of the water inlet respectively, an emptying port is formed in the position, close to the bottom, of the reaction tank body, a first hedging inlet is formed in the tank wall on the same side as the emptying port, and the height of the first hedging inlet is slightly larger than that of the emptying port. A plurality of second hedging inlets are formed in the tank wall on the other side opposite to the first hedging inlets, and a plurality of sand discharge ports and manholes for maintenance personnel to enterare formed in the tank wal