Pretreatment equipment for oil-containing and dust-containing waste gas

The invention discloses oil-containing and dust-containing waste gas pretreatment equipment, and belongs to the field of waste gas pretreatment, the oil-containing and dust-containing waste gas pretreatment equipment comprises a spraying assembly, a cyclone assembly and a circulating water tank, the water outlet end of a circulating water pump is fixedly communicated with a main pipe, and the main pipe is fixedly communicated with at least two first branch pipes; the first branch pipes extend into the spray tower and are fixedly communicated with spray pipes, one ends, close to the spray pipes, of the first branch pipes are provided with contraction parts, the inner diameters of the contraction parts are gradually reduced from one end close to the main pipe to one end close to the spray pipes, the adjacent spray pipes are distributed up and down, and the bottom of the uppermost spray pipe is fixedly communicated with a rotary spray head; at least one spraying opening is formed in the bottom wall of each of th