Multi-stage centrifugal filtration system and multi-stage centrifugal filtration method for sodium bicarbonate

The invention discloses a multi-stage centrifugal filtration system and method for sodium bicarbonate, and relates to the field of sodium carbonate preparation. The multi-stage centrifugal filtration method for the sodium bicarbonate comprises the following steps: step 1, carrying out thickening treatment on a carbonized taken-out solution to obtain a thick solution; 2, carrying out multi-stage centrifugal filtration treatment with gradually increased filtration precision on the thick liquid to obtain required sodium bicarbonate; wherein the multi-stage centrifugal filtration treatment comprises a multi-time centrifugal process and a multi-time water spraying process, and the multi-time water spraying process is sequentially implemented between the first-time centrifugal process and the last-time centrifugal process. According to the multi-stage centrifugal filtration system and method for the sodium bicarbonate, emission of ammonia and filtered tail gas can be reduced, and physical and psychological health o