Fluorgypsum waste residue and waste gas settling and purifying device

The fluorgypsum waste residue and waste gas sedimentation and purification device comprises a steel-structured sealed shell, and the sealed shell is provided with a gas inlet, a gas outlet and a dust discharge port; the sealing shell comprises an airflow channel and an ash containing hopper, the airflow channel is located above the ash containing hopper, the bottom of the airflow channel is communicated with the upper end of the ash containing hopper, an air inlet and an air outlet of the sealing shell are located in the two sides of the airflow channel, and an ash discharging opening is located in the bottom of the ash containing hopper; an anti-corrosion layer is arranged on the inner wall of the sealing shell so as to prevent continuous corrosion of hydrogen fluoride; the air flow channel is divided into S-shaped channels by the partition plates, so that the air flow stroke is increased; the serpentine channel comprises an ascending channel and a descending channel, and a baffle plate is arranged on the as