Present situation and development trend of drying technology in China
Over the past 30 years, many drying technologies in China have been industrialized, mainly spray drying, fluidized drying (ordinary fluidized bed, vibrating fluidized bed, internally heated fluidized bed, fluidized bed spray drying), steam rotary drying, airstream drying, rotary cylinder drying, rotary quick drying, disc drying, belt drying. Drying, double cone rotary vacuum drying, blade drying, freeze drying, microwave and far infrared drying, grain drying, etc.
Conventional drying equipment can basically meet the production needs, some models have reached the international contemporary level and exported to foreign countries.
The importance of drying unit is not only that it has a great impact on the efficiency and total energy consumption of product production process, but also that it is often the last process of production process. The quality of operation directly affects product quality, thereby affecting market competitiveness and economic benefits. There are many products in our country, which have reached or even surpassed foreign products in terms of purity, just because drying technology is not as good as that of foreign countries, the physical properties such as bulk density, particle size, color and so on are not up to standard, and they are at a disadvantage in the international market competition, some of which are sold for only one third of the same kind of products abroad.
At present, some large petrochemical drying equipment in China also rely on imports. It is estimated that the type of drying equipment produced in our country is only 30% to 40% of that abroad. It can be seen that the research of drying technology in China is still a long way to go.
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