The drying speed of the dryer directly affects the output of the equipment and is related to the economic benefits of the user. So, in the process of dehydrating and drying materials by the dryer, what is the reason for the slow drying speed, and how should we solve this situation?
First of all, most of the materials targeted by the dryer are high humidity, so that due to the large moisture in the material, in the process of drying, it is necessary to absorb more heat to achieve the purpose of dehydration and drying. Under the same conditions such as temperature and air volume, the higher the moisture in the material, the longer the drying time. Therefore, for materials with extremely high water content, we can first carry out proper dehydration treatment to increase the drying speed of the dryer.
Secondly, when we dry the material, the feeding particle size of the staff and the uniformity of the feeding material also affect the drying rate to a certain extent. When the particle size of the material is smaller, the internal diffusion resistance is also smaller, and the faster the drying; However, large particles of materials can easily form an air film layer during the drying process, preventing the heat transfer of the inner layer of materials. Therefore, for large pieces of material, we need to properly crush them before drying. At the same time, the average feeding of the staff is also the premise of realizing the uniform flow of materials, which can ensure the stability of the thermal system of the heat load of the dryer and make the moisture of the material consistent after drying; On the other hand, it can also make the exhaust gas easy to grasp and control, and ensure the quality of drying.
Third, if the dryer leaks air or the heat is insufficient in the process of drying the material, the drying speed of the material will be directly reduced. Because the dryer is mainly realized through the heat exchange between the material and the high-temperature flue gas, if the sealing of the dryer cylinder is not good, it will lead to the heat can not reach the dryer cylinder in time, and in the case of insufficient heat, the material can not carry out a good heat exchange, thereby slowing down the drying speed and causing a waste of resources at the same time. Therefore, ensuring the tightness of the drum and the sufficiency of heat is an important condition for improving the drying speed of the dryer.