As the world's energy consumption increased year by year, as a primary source of coal combustion, the release of a large number of sulfur dioxide and the formation of regional acid rain, the environment has caused serious pollution, it undermines the ecological balance, causing large areas of forest Soil destruction, soil acidification of lakes, building corrosion.

Therefore, the control and reduction of sulfur dioxide emissions is a very important task. In many of the desulfurization technology, the use of spray drying method to remove sulfur dioxide in flue gas is a more and more attention to technology. The technology began in the 1970s and was commercially put into operation in the late 1970s. It has the advantages of low investment, simple operation, high sulfur removal efficiency and no secondary pollution. Compared with the wet method, which is widely used in flue gas desulfurization, powder product formed by spray drying desulfurization has greater selectivity and development value.

It is an important prerequisite for the widespread application of spray-dried sulfur-sulfur technology to solve the problem of reasonable exploitation and utilization of a large number of powder sulphates after drying. Can be regenerated as an absorbent, part of the dry material can be recycled, as the earth's fill, into a paste for cement retarder, made of granular artificial sand, as a building material filler instead of the usual Concrete and asphalt.