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A thorough solution to the high water content of sodium pyrosulfite in the desulfurization process. In the sodium-based flue gas desulfurization process, the slurry washes the flue gas in counter-current within the absorption tower, producing sodium sulfite hemihydrate which is transferred to the slurry in the form of small particles. Air is then used to force its oxidation to form sodium sulfate dihydrate (NaSO4·2H2O) crystals. The discharge pump extracts the slurry from the absorption tower and sends it to a thickener for concentration and particle sizing; the dilute overflow (fine particles) is returned to the absorption tower ； The concentrated underflow (coarser particles) is sent to a disk vacuum filter for dewatering. Then, the moisture content of the sulfur gypsum after dehydration using the WHR850 super centrifuge is generally kept below 19% (on a mass basis), which meets the required standards. If the moisture content is too high, it not only affects the proper operation of the desulfurization systems and equipment, but also poses difficulties in the storage, transportation, and processing of the materials after drying. Reasons for high moisture content in materials after dehydration using super centrifuges: Abnormalities in the thickener. The solid content at the outlet of the thickener is generally around 65%; any internal blockages should be addressed promptly. If scaling occurs internally or the sedimentation nozzles wear out beyond normal limits, they need to be replaced immediately. It is also important to monitor and control the inlet pressure; otherwise, the separation efficiency of the thickener will be poor, resulting in higher moisture content in the material that enters the vacuum filter. This, in turn, makes it difficult for the centrifuge to remove water from the material, increasing its moisture content.