Overall demand is high thermal efficiency, low energy consumption, simple configuration, easy to control, small footprint, operating environment safety and health. At present, the salt industry to use more common drying equipment: rotary tube dryer, indirectly heated rotary dryers, disc continuous dryer, air dryer (divided pulse stream, flow rotation, positive and negative two air drying ), spin flash dryers, rotary drum dryer, spray dryer (divided granulated, powdered, centrifugal, pressure), vibration fluidized bed dryer, static vacuum dryer, hot air circulation oven, rake , paddle vacuum dryer, boiling dryer (horizontal, vertical), etc. These drying equipment for product quality to provide a guarantee, but there are exhaust collect "dust" problem. Due to the increasing nanoscale products, more and more original fine particle size, moisture content of paste materials potentially increase, coupled with the companies continue to large-scale, large-scale development, enterprise desire combined drying equipment. In particular, some large-tonnage products, such as precipitated calcium carbonate, the current national production of 300 million tons, the smallest production line with an annual output of 10,000 tons, 100,000 tons of scale to five sets of drying equipment, Guangxi, a business plan to get 500,000 tons, At current levels of drying equipment, regardless of the area of ??the exhaust gas after drying equipment or product revenue "dust" is a great amount. According to the current industry commonly used pulse bag filter, the operating environment is very bad, we must take effective measures to solve them. Therefore, we want the device research and development unit focused on solving two problems, one is the high water content of fine paste dried object problem, and second, after the object dry exhaust collect "dust" industrial health problems. Still the calcium carbonate industry, for example, of the more than 200 companies in the drying equipment selection, the basic use indirect heating rotary dryers, disc continuous dryer, rotary tube dryer or the like, although productivity is met, the energy consumption and exhaust revenue "dust" is not ideal, into a calcium carbonate business from the ground to the roof are covered with a layer of white calcium carbonate powder, even in the office furniture is a layer of white, there are management problems in this regard more important after the dry exhaust collect "dust", but off. The industry has recently introduced a US company DuPont dust removal equipment, basically solved the problem. Therefore, the combination of drying equipment should include: providing a heat source equipment, primary and secondary drying equipment, exhaust collect "dust" equipment, you want the device manufacturing, research units fuss high thermal efficiency, low energy consumption, simple configuration, convenient control etc. In a combination of drying equipment to make a fuss, service to others, to develop themselves. If the drying problem of calcium carbonate industry solved, realized the equipment efficient, environmentally friendly, other varieties of dried enough to solve the problem. 

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