Drying Equipment 
 With the increase of environmental awareness, the sulfur dioxide emissions in power plant flue gas, more and more tight control, power plant desulfurization is imperative. Chemical dryer FGD gypsum processing technology and dryer equipment is not entirely the same as the natural gypsum, such as material handling, dust processing, calcining process: the physical aspects of FGD gypsum and natural gypsum difference, such as desulfurization gypsum of high purity, free water, fine granularity; particle size, size distribution, poor grading, water consumption standard thick, containing water-soluble salt more; also worth noting that the two sources of FGD gypsum and natural gypsum unreacted calcium carbonate, gypsum, the main impurities and is not the complete oxidation of calcium sulfite exists, the difference between the larger state of impurities, another the desulfurization production process technology to deal with the different different limestone ingredients, processing limestone fine different quality will affect the FGD gypsum. 
 Characteristics of drying equipment 
 1, rotary dryer anti-overload, large capacity, low fuel consumption, low cost dry. 
 2, downstream drying, hot air and the wet material into the dryer on the same side, you can use the high-temperature air to high evaporation, dryer outlet temperature, high thermal efficiency. 
 3, according to different material properties to change the operating parameters, so that the material to form a stable full cut fabric curtain in the dryer cylinder body, the quality of heat exchange more fully. 
 4, the new feeding, nesting devices, put an end to the drum dryer feed plug, discontinuous, uneven, and returning materials such phenomena, reducing the dust load. 
 5, drum dryers to achieve "zero thrust, greatly reducing the wear of the gear riding wheel cylinder is smooth and reliable operation. 
 6, dryer aligning supporting roller device, riding wheel and rolling circle with linear contact forever, and thus greatly reduce the wear and power loss.