3-5.Balance of the process

Balance of the process

When dry quickly at high speed wet material, deviation of the moisture content and temperature of the material inside will increase.

As a result, the critical moisture content is increased, it may cause cracks.

When it comes to the state of “evaporation rate of <surface moisture transfer rate of the material inside”, only the surface is dry while containing a lot of water inside the material, critical moisture content will increase.

Therefore, it is also important to shorten the preheating period of Ⅰ period.
The Ⅱ period changes with a liquefied water transfer coefficient.
The Ⅲ period and the Ⅳ period change with a steamy diffusion coefficient.

Move to the liquid rather than move the vaporized is more effective molecular weight of water.

Process design must use ingenuity to reduce the critical moisture content.

Guide to the optimal wind drying heater