Filtering plate, vertical rotation gypsum dehydrator, working method and gypsum dehydrating system

Abstract

The invention provides a filtering plate. The filtering plate is a sealed body provided with a gas and liquid port, and a cavity is formed in the filtering plate. A filtering medium located on the surface of the filtering plate is in contact with solid-containing grout to be filtered, the filtering medium is fixed to the filtering plate and comprises a soft body material with first selective permeating capability, and a supporting layer with second selective permeating capability is arranged on the inner side of the filtering medium and used for supporting the filtering medium to be formed. The inner side of the supporting layer is closely adjacent to the cavity, and the cavity is connected with a set external system unit through the gas and liquid port. The filtering medium of the filtering plate can be washed and regenerated without a large amount of water, so that water is saved, and the water consumption of a system is reduced. The invention further provides a vertical rotation gypsum dehydrator and a working method. The vertical rotation gypsum dehydrator comprises the filtering plate and is simple in structure, beneficial to enlarging handling capacity, small in occupied land area, and capable of solving the site limit problem of the desulfurization system; water is saved, the water consumption of the system is low, and the water balance limiting problem of the desulfurization system is solved.

Description

technical field [0001] The present invention relates to the technical field of wet flue gas desulfurization, in particular to a filter plate, a vertical rotary gypsum dehydrator and a working method; Dehydrator and its working method. Background technique [0002] At present, coal-fired power plants are major emitters of sulfur dioxide. In recent years, in order to protect the environment and reduce sulfur dioxide emissions, a large number of coal-fired power plants have installed flue gas desulfurization systems. Limestone-gypsum wet flue gas desulfurization (FGD) process is currently the main desulfurization process for thermal power plants. The wet desulfurization process desulfurizes boiler flue gas containing sulfur dioxide and limestone slurry in the absorption tower to generate gypsum slurry as a by-product of desulfurization, and then removes excess water in the gypsum slurry through a gypsum dehydration system to make gypsum with a lower water content For storage ...

AI Technical Summary

Problems solved by technology

[0009] Another technical problem to be solved by the present invention is to overcome the problem that the existing gypsum dehydration device cannot cope well with the site restriction and water balance restriction of the desulfurization system at the same time, and overcome the problem that the existing gypsum dehydration device has a complex structure and high operating costs , a vertical rotary gypsum dehydrator and working method are proposed, including the filter plate, the structure is simple, it is beneficial to expand the processing capacity, and the floor space is small, which solves the site limitation problem of the desulfurization system; water saving, low water consumption of the system, and filtration The cleaning and regeneration of the medium does not require a large amount of water, or even no water, nor does it need to use dangerous chemical cleaning and complicated ultrasonic cleaning, the operation failure rate is low, and the operation and use costs are reduced. There is a problem that the device structure is complex and the operation cost is high

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