How many stages can the drying equipment dry? If we assume that the material is constant and no chemical reaction will occur, the drying equipment will dry the material in 4 stages. The specific stages are as follows:
1. Rising speed drying stage: It is to use a very high temperature to evaporate the moisture on the surface of the material in a relatively short period of time. This stage requires relatively short time, but it is also limited to the moisture on the surface, so this stage The amount of water produced is small.
2. Isokinetic drying stage: At this stage, the material is heated, so that the moisture inside the material is slowly replenished to the surface. Due to the high temperature heating of the material surface, the moisture on the surface of the material evaporates quickly. When the speed of replenishing water to the surface cannot keep up with the rate of evaporation of water on the surface of the material, it enters the speed-reducing drying stage.
3. Slow-down drying stage: The material moisture at this stage has been evaporated for a large part. At this stage, the material is slowly dried, and the moisture inside the material is gradually forced to the surface to be evaporated.
4. Equilibrium drying stage: When the moisture inside the material is forced to dry and no more water is replenished to the surface, it enters the equilibrium drying stage. This stage is also the stage where the material is dried to obtain the finished product.