The invention discloses a multistage
dehydration and
separation system which comprises an absorption
tower, a
gypsum slurry discharge pump, a
gypsum cyclone, a gas-water separator, a filter cloth washing water tank, a filter liquor pond and a
gypsum bin. A
slurry pond is arranged at the bottom of the absorption
tower; the gypsum
slurry discharge pump is arranged outside the slurry pond, and one end of the gypsum slurry
discharge pump is connected with the slurry pond; a feed inlet of the gypsum
cyclone is connected with the other end of the gypsum slurry discharge pump, an overflow opening of the gypsum
cyclone is connected with a
wastewater treatment system, and a base flow opening of the gypsum cyclone is connected with a feed inlet of a vacuum belt dehydrator; a top inlet of the gas-water separator is connected with the vacuum belt dehydrator, a top outlet of the gas-water separator is connected with one end of a
vacuum pump, and the other end of the
vacuum pump is connected with an
exhaust pipe; a top inlet of the filter cloth washing water tank is connected with the
exhaust pipe, a bottom outlet of the filter cloth washing water tank is connected with one end of a filter cloth washing water pump, and the other end of the filter cloth washing water pump is connected with a filter cloth washing water port; the filter liquor pond is connected with a bottom outlet of the gas-water separator, a stirrer and a flow filter pump are arranged in the filter liquor pond, and the flow filter pump is connected with the absorption
tower; the gypsum bin is connected with the vacuum belt dehydrator. The multistage
dehydration and
separation system has the
advantage of simple structure, convenience in repair and maintenance, low cost, washing cleanliness, good
dehydration effect and high dehydration efficiency.