Production system for producing building plaster by using desulphurization gypsum and realization method of production system

Abstract

The invention discloses a production system for producing building plaster by using desulphurization gypsum. The production system comprises a feeding system, a drying system, a calcining system, a dust removing system, a burning system and a material storing and packaging system, wherein the feeding system is used for feeding plaster materials; the drying system is used for drying the plaster materials; the calcimining system and the burning system are used for calcining the plaster materials into the building plaster; the material storing and packaging system is used for packaging the building plaster; the dust removing system is applied to all subsystems of the production system for removing dust in the production. The production system has the following advantages that the building plaster is prepared by a drying and calcining two-step method of a spiral dryer and a fluidized bed combustion boiler; the production system has remarkable advantages of low energy consumption, simple technology, stable quality of a product, easiness in control and the like.

Description

technical field [0001] The invention provides a production system and a realization method for producing building gypsum by using desulfurized gypsum, belonging to the technical field of gypsum production. Background technique [0002] my country is a large coal-burning country. With the increase of coal burning, the emission of sulfur dioxide is also increasing. In 2004, my country's sulfur dioxide emission exceeded 15 million tons, becoming the largest country in the world in terms of sulfur dioxide emission. Coal is the main fuel for electricity production in the world today, and the burning of coal in power plants is the chief culprit of sulfur dioxide pollution and acid rain. The coal consumption of thermal power plants in my country accounts for about one-third of the national coal output. Therefore, the desulfurization treatment of coal-fired power plants has become a major issue related to the national economy and people's livelihood. The most widely used and most e...

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Problems solved by technology

[0003] The treatment of desulfurized gypsum (FGD) has just started in my country, and there are various treatment methods. At present, there are relatively mature desulfurized gypsum calcination methods mainly as follows: one is high-temperature gas flow flashing using heavy oil as raw material This method has a small footprint, advanced technology, and high degree of automation. The successful application of this calcination method in China is the production of 30,000 tons of building gypsum per year in Beijing Guohua Jiedi Power Technology Service Co., Ltd., but according to its The use experience shows the shortcomings of high energy consumption, high cost, low output, etc., and due to the current domestic fuel oil thermal technology level and financial constraints, there are great difficulties in the formation of product serialization; the other is the use of fuel oil The high-temperature gas flow flash combustion method with coal as raw material has significant advantages such as low energy consumption and small footprint, but at the same time, it has the inherent disadvantages of polluting gypsum, difficult quality control, and unstable phase composition of the finished product. At present, there is no successful case in China. Northeastern University is now conducting research in this area

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