Adipic Acid Drying Technology

Ideal Choice for Adipic Acid Drying and Cooling Equipment

Adipic acid, also known as fatty acid, is an important organic dibasic acid. It is loose and has a wide range of particle size distribution. It is slightly corrosive, flammable, explosive, and prone to static electricity. Due to its low solubility in water, its water is present in the form of surface water. It can be polycondensed with a diamine or a glycol to form a polymer. Adipic acid is a dicarboxylic acid of great industrial significance. It plays an important role in chemical production, organic synthesis industry, medicine, lubricant manufacturing, etc. Adipic acid is mainly used as a raw material for the production of nylon 66, engineering plastics and other ester products ,such as polyurethane elastomers. It is also used for acidification of various foods and beverages.

Tianli Energy's internal heating fluidized bed dryer is an ideal choice for the core equipment of adipic acid drying and cooling system. This equipment is suitable for drying or cooling powdery and granular non-sticky materials, such as adipic acid, soda ash, common salt, sodium percarbonate and PVC. Compared with other drying equipment, the air medium entering the internal heated fluidized bed mainly plays the role of carrying moisture, not the main heat carrier. The heat required for drying is mainly provided by the heat exchanger built in the bed. So the amount of air medium is only the minimum amount needed to fluidize the material and remove moisture.

The internal heated fluidized bed has the following characteristics:

1.The fluidization speed is low, and the amount of entrained material by tail gas is small.

2.the equipment covers a small area, and the investment is low；

3.Long drying time, good drying effect.

4.Lower installed power of supporting auxiliary machines

5.Because the required amount of air is small, the installed power of the fans, heater, and dust removal device also becomes lower, which reduces the total equipment investment;

6.Less exhaust emissions from the drying system, lower pressure for environmental protectio

7.High thermal efficiency. As the flowing material continuously flushes the tube wall of the heat exchanger, the thermal resistance between the gas-solid two-phase flow and the tube wall of the heat exchanger is destroyed, which greatly improves the mass and heat transfer coefficient and reduces the drying cost