Wet flue gas desulfurization gypsum dehydration system and control method

The invention discloses a wet flue gas desulfurization gypsum dehydration system which comprises a dehydration module and a filter liquor recovery module, wherein the dehydration module comprises an absorption tower, a cyclone, a belt dehydrator and a gypsum warehouse; and the filter liquor recovery module comprises a filter liquor tank connected with the belt dehydrator, a filter liquor pump arranged on the filter liquor tank and a flow monitoring module, and the absorption tower, the cyclone, the belt dehydrator, the gypsum warehouse, the filter liquor tank, the filter liquor pump and the flow monitoring module are connected through pipelines. According to the invention, the problems that the slurry contains impurities, and the system cannot normally operate due to the fact that the cyclone is blocked after the slurry flows into the cyclone are solved. The operation steps of the wet desulphurization gypsum dehydration system are simplified, the reaction liquid is effectively utilized, the water flow of the