Rotary Flash Dryer Long-term Dependence on Foreign Import

The rotary flash drying of the catalyst industry has long been dependent on imports from abroad, but its use has been unsatisfactory. In 2004, China National Petroleum and Chemical Corporation Catalyst Changling Branch (Changling Branch) was involved in the expansion of ultra-stable molecular sieve installations and countries. The Drying Technology and Equipment Technology Research Center cooperated in the development of molecular sieve-specific rotary flash pre-drying technology and equipment. The project was included in the 2004 Sinopec Scientific and Technological Research and Development Project. And put into use that year, up to now, the catalyst industry's rotary flash drying is completely domestic and put into operation more than 40 sets, the performance is better than foreign products.

Rotary flash drying is a drying method in which convective heat transfer is performed by direct contact of hot gas with wet materials using hot gas as a carrier. Its optional operation flexibility is wide, the hot gas inlet temperature can be from about 150°C to about 1000°C (according to the temperature resistance of the material of the equipment body and the heat-sensitive requirement of the material to be dried); the choice of gas heating method is mainly According to the requirements for gas quality and temperature of the material to be dried, currently widely used gas heating methods include: electric heating, steam heat exchange, direct heating of fuel oil or fuel gas (ie, smoke gas generator), fuel oil, or Indirect heating of fuel gas or coal (using heat exchangers), etc. The rotary flash drying system has the characteristics of small equipment size, compact structure, and small footprint, and is integrated with drying and crushing. It is a drying method with a very good application prospect.

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