The invention discloses a multi-stage
waste gas purification device, and belongs to the technical field of
waste gas purification, the multi-stage
waste gas purification device comprises a
spray tower, a gas inlet
pipe and a gas outlet
pipe, one side of the
spray tower is provided with a
liquid storage cavity, a variable speed water pump is arranged between the
liquid storage cavity and the
spray tower, a gas quality sensor is arranged in the gas inlet
pipe, and a gas outlet pipe is arranged in the gas outlet pipe. The bottom end of the spraying frame is rotationally connected with a spraying main pipe, a hydraulic driving mechanism for driving the spraying main pipe to rotate is arranged on the spraying frame, the output end of the variable-speed water pump is communicated with the hydraulic driving mechanism, and the spraying main pipe is provided with multiple
layers of spraying mechanisms communicated with the spraying main pipe from top to bottom; an adjusting
piston is arranged in the spraying main pipe in a sliding and sealing manner, and a centrifugal self-adjusting driving mechanism for driving the adjusting
piston to slide along the spraying main pipe is arranged at the bottom end of the spraying main pipe. The multi-stage waste gas purification device provided by the invention can be used for monitoring the concentration of
air pollutants and is provided with a plurality of
layers of spraying mechanisms, and the spraying liquid flow and the spraying
layers are automatically adjusted according to the concentration of the waste gas pollutants.