Heat Exchanger----Large-scale Fluidized Bed Dryer with In-bed Heat Exchanger
Working Principle:
Preheated gas (air) is passed into the product layer under controlled velocity after being uniformed by the distributor so as to create a fluidized state. Fluidized bed dryer with in-bed heat exchanger is superior in an advanced drying technique combined with normal fluidized bed drying and indirect conduction type drying. The in-bed heat exchanger enhances heat transfer of solid particles and thermal medium and improves drying efficiency and drying capacity.
Characteristics:
1. Efficiency in energy saving is high. Most heat is provided by the in-bed heat exchanger with the efficiency about 90%, hot air is used mainly to ensure normal fluidization, the quantity of hot air is much less than that needed by conventional fluidized bed; power consumption and heat losses of the exhaust air are accordingly reduced, resulting in higher drying efficiency.
2. As gas flow velocity in the system is lower than that in the conventional fluidized bed, so the material being entrained from the fluidized bed by the air is reduced significantly, the load of the dedusting system is reduced and the environmental protection is improved correspondingly.
3. Use of a special air distributor to prevent material leaking.
4. Easy to install, simple to operate, inexpensive to maintain.
Material to be dried:
ethane diacid, calcined soda, table salt, sodium carbonate, sodium sulphate, potassium chloride, nitrate of potash, ammonium chloride, ABS plastic, styrene, ammonium nitrate, ammonium sulfate, calcium chloride, calcium formyl, calcium hypochlorite, calcium sulphate, coal, crystal sugar, diamine phosphate, calcium phosphate, grain porcelain clay, grain fertilizer, hydroquinone, iron sulfate, emulsoid resin, pentaerythritol, potassium carbonate, potassium chlorate, potassium phosphate, potassium tartrate, steel scrap, PVC, sludge, baking soda, sodium bromide, sodium carbonate, sodium chlorate, sodium formate, amylum, terephthalic acid and etc.
Key Words: Fin tube, finned tubes, heat exchanger, Bed Dryer