Multistage dehydration and separation system

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of desulfurization, in particular to a multistage dehydration and separation system. Background technique [0002] In the field of thermal power plants, a large amount of flue gas will be produced, and these flue gases will be desulfurized through the absorption tower before being discharged into the atmosphere. The gypsum slurry is recycled. Among them, the gypsum slurry is a mixture containing gypsum crystals, calcium chloride, a small amount of unreacted limestone, calcium fluoride and a small amount of fly ash. In the process of recycling the gypsum slurry, the gypsum slurry can be separated from impurities after passing through the gypsum slurry cyclone. Next, it is also necessary to use the gypsum slurry dehydration system to wash and dehydrate the gypsum slurry. However, the gypsum slurry dehydration system in the prior art has the disadvantages that it is not clean enough after washing and the deh...

AI Technical Summary

Problems solved by technology

However, the gypsum slurry dehydration system in the prior art has the defects that it is not clean enough after washing and the dehydration effect is not ideal

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