The dehydrator is an important apparatus in the Fuel Gas Desulfurization(FGD)system of thermal power plants,which directly determines the quality of the desulfurization by-product-gypsum.This essay analyzes and compares the vacuum belt-type dehydrator and disc-type dehydrator in the limestone-gypsum wet desulfurization process.The vacu-um belt-type dehydrator technology is mature,with a simple structure,low initial investment,and high operating per-formance,but it has high consumption and operating costs.The disc-type dehydrator has a small footprint,low power consumption,and operating fees.Taking the selection of gypsum dehydrator for a desulfurization system of 2 × 1000 MW plant as an example,by comparing the initial investment,electricity consumption,water consumption,and maintenance costs of the equipment,the initial investment of the disc-type dehydrator is increased by about 3.45 million Yuan compared to the vacuum belt-type dehydrator,and the annual operation and maintenance costs are saved by about 782.9 thousand Yuan.
thermal generationdesulfurizationgypsum dehydratordisc filtervacuum belt dehydrator
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