Desulfurization gypsum drying and calcining equipment, and production process

Abstract

The invention relates to desulfurization gypsum drying and calcining equipment for drying and calcining the desulfurization gypsum to obtain high-quality beta hemihydrate gypsum, and a production process. The equipment comprises a drying drum, a calcining drum and an induced draft fan, wherein an air inlet of the induced draft fan is communicated with the calcining drum; an air outlet of the induced draft fan is communicated with the tail end of the drying drum; the front end of the drying drum is in butt joint with a first feeder and a second conveyor; the first feeder is in butt joint with a first conveyor; the second conveyor is in butt joint with a second feeder; the second feeder is in butt joint with the calcining drum; and a heat source supply furnace is communicated with the calcining drum through a hot air pipe. Two pieces of equipment of a drying process and a calcining process are combined, so the problems about transfer and storage of intermediate products are solved, space is saved, and environmental pollution caused by the intermediate products is avoided; and meanwhile, the induced draft fan is used for leading calcining waste gas in the calcining drum to the drying drum to serve as a heat source for drying the desulfurization gypsum, so the waste gas is reutilized and resources are saved.

Description

technical field

[0001] The invention relates to the field of gypsum treatment, in particular to desulfurized gypsum drying and calcining equipment and a production process for obtaining high-quality β hemihydrate gypsum after drying and calcining the desulfurized gypsum. Background technique

[0002] With the increasing awareness of environmental protection, my country's control over the emission of sulfur dioxide in coal-fired flue gas is becoming more and more stringent, and desulfurization of power plants is imperative. At present, the most widely used flue gas desulfurization and the most mature technology is the limestone / gypsum wet desulfurization process. The average sulfur content of the coal used by the unit is 1.23%, and the average desulfurization efficiency reaches 92.5%. Incrementally, at present, the country can reduce sulfur dioxide emissions by 2.3 million tons per year, and the amount of desulfurized gypsum waiting to be treated is more than 10 million tons....

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