Applications of rake-type vacuum dryers in practical situations

In what situations are rake-type vacuum dryers used? They are used for drying wood and organic fertilizer. During the drying process, because the radial and tangential shrinkage rates of wood differ, the greater the difference between the two at the same moisture content, the greater the likelihood of cracking. If the difference in radial and tangential shrinkage rates is significant in the early stages of drying, surface cracking will occur. If the difference remains significant in the middle and later stages of drying, internal cracking is more likely to occur.

To prevent these phenomena, wood drying technology must adopt spray-steam treatment (preheating treatment, central treatment, and post-treatment) to effectively reduce the degree of cracking or even completely prevent it.

 

Organic fertilizer drying equipment can be used to dry high-moisture, high-viscosity materials such as pig manure and chicken manure. Different organic fertilizer drying equipment should be selected for different materials; choosing the correct drying technology is crucial. Organic fertilizer is a material that is not easy to dry and tends to stick to the walls and clump. Only by designing organic fertilizer drying equipment according to the characteristics of the material can the nutritional value and quality of the finished organic fertilizer be ensured.