Gypsum dehydration device matched with wet desulphurization system

Abstract

The invention discloses a gypsum dehydration device matched with a wet desulphurization system, and relates to the technical field of wet desulphurization of coal-fired power plants. The invention mainly relates to a second-stage solid-liquid separation process in a system byproduct discharge process, in particular to a gypsum dehydration device matched with a wet desulphurization system. The gypsum dehydration device comprises a hollow shell, a slurry inlet and a gypsum outlet are arranged on the shell, and a buffer feeding device is arranged at the slurry inlet. Continuous operation can be achieved through the axis driving design, the process structure is simple, the occupied area is small, the replacement cost of filter cloth consumables is low, the problem that the vacuum degree is reduced due to deviation of filter cloth is solved, and there is no special selectivity for the quality of gypsum slurry. The gypsum dehydration device can replace an existing vacuum belt dehydrator andan existing vacuum disc dehydrator in a limestone-gypsum wet desulphurization process to achieve solid-liquid separation of gypsum slurry.

Description

technical field [0001] The invention relates to the technical field of wet desulfurization in coal-fired power plants, mainly relates to a second-stage solid-liquid separation process in the discharge process of system by-products, and specifically relates to a gypsum dehydration device matched with a wet desulfurization system. Background technique [0002] The limestone-gypsum wet flue gas desulfurization process is the most extensive technical route for coal-fired power plants in my country, and domestic projects account for more than 85%. During the stable operation of the desulfurization system, reasonable control of operating parameters is the main operation. One of the purposes is to ensure the material balance of the system. Therefore, the desulfurization system needs to continuously discharge a corresponding amount of gypsum by-products. During this process, the solid-liquid of gypsum slurry is involved. separate. The common solid-liquid separation system is a two-...

AI Technical Summary

Problems solved by technology

The operating principle of the vacuum disc dehydrator is that the fan connected to the vacuum pump is a negative pressure area. During the directional rotation of the disc, the solid gypsum can be picked up in the slurry pool at the bottom of the disc. Impurities in the slurry or gypsum with small crystal particles cannot be removed When it is effectively discharged, it returns to the absorption tower system again; if the quality of the gypsum slurry is poor or the gypsum crystallization is abnormal, it will be difficult for the fans to catch the solid gypsum, resulting in paralysis of the system

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