Equipment for removing nano-grade dust in gas and dust removing method of equipment

The invention relates to equipment for removing nano-grade dust in gas and a dust removing method of the equipment. According to the dust removing equipment, a separation force is directly applied to particles so that the nano-grade dust in the gas can be removed; and the dust removing equipment is suitable for optical communication and new energy source industries. The dust removing equipment comprises a plate type positive electrode, a pipe type negative electrode, a spraying device, a gas flow distribution device, a shell, a buffering groove, an exhausting pipe and a draught fan; a plate type positive electrode mounting bracket and a pipe type negative electrode mounting bracket are mounted in the shell; the plate type positive electrode is mounted on the plate type positive electrode mounting bracket; the pipe type negative electrode is mounted on the pipe type negative electrode mounting bracket; the pipe type negative electrode is located in the middle of the plate type positive electrode; the spraying device comprises water pipes and spraying heads; the water pipes are distributed at the upper, middle and lower parts in the shell; the spraying heads are uniformly distributed on the water pipes and the spraying heads are distributed in a 360-degree direction; the gas flow distribution device is composed of a gradually-expanded pipe and a gas flow distribution plate; the buffering groove is formed in the lower part of the shell; and the exhausting pipe is mounted at the top of the shell and the draught fan is mounted on the exhausting pipe.