The invention relates to a
capsule cylindrical
microwave flash evaporation device used for heavy
metal wastewater treatment and belongs to the technical field of heavy
metal wastewater evaporation treatment. The device comprises a
resonance cavity body, a
microwave feed inlet, a waste liquid inlet, a waste liquid outlet, a
flash evaporation nozzle and a waste liquid conveying pipeline. The
resonance cavity body is composed of an upper
metal cavity, a
cylindrical waveguide pipe and a lower metal cavity. The upper metal cavity and the lower metal cavity are located at the upper end and the lower end of the
cylindrical waveguide pipe. The
microwave feed inlet is formed in the side face of the
cylindrical waveguide pipe and is fixedly connected with the
resonance cavity body in a sealed mode. The waste liquid inlet and the waste liquid outlet are formed in the top and the bottom of the resonance cavity body and are communicated with an inner cavity of the resonance cavity body. The
flash evaporation nozzle is disposed in the resonance cavity body, and the waste liquid conveying pipeline is connected with the waste liquid inlet and the flash
evaporation nozzle. The device has the advantages that the structure is simple, cost is low,
coupling efficiency between the feed inlet and the flash
evaporation cavity is high, the volume of the cavity is large, the
concentration ratio of an area with large
field strength is high, the Q value of the cavity is high, and microwave flash evaporation is
environmentally friendly, quick, efficient and capable of saving energy.