The working principle of the double-cone vacuum drying unit is to place the material to be dried in a sealed cylinder, and heat the material to be dried while vacuuming with a vacuum system, so that the moisture inside the material diffuses to the surface through the pressure difference or concentration difference, and the water Molecules (or other non-condensable gases) gain enough kinetic energy on the surface of the material, and after overcoming the mutual attraction between molecules, they diffuse into the low-pressure space of the vacuum chamber and are sucked away by the vacuum pump to complete the separation from the solid.
Next, the editor briefly introduces the four major characteristics of materials, including:
1. Bulk density of materials: The mass of materials per unit volume is called bulk density. Since the material is a mixture of dry material and moisture, the dry material is often granular, powdery or solid, and the gap between the dry material particles varies with the moisture in the material.
The bulk density of the original wet material and the material in the drying process is very different, so it should be paid attention to when choosing a dryer.
2. Viscosity of the material: The viscosity of the material changes with its moisture content. The viscosity can make the material agglomerate and stick to the wall of the cylinder. After drying, it is easy to stick to the dust collector and the pipe wall. Pneumatic shock and crushing devices can be used.
3. The allowable temperature of the material: the allowable temperature is the highest temperature that the material can withstand. Exceeding this temperature will result in changes in potency, decomposition, or discoloration of the material.
4. Material slip angle: When stacking granular or powdery materials, when the angle between the slope and the bottom surface of the material pile increases to a certain angle, the side material will slide down.
The angle between the inclined surface where the material slides and the bottom surface is called the slip angle of the material. The slip angle is related to material composition, moisture content, particle size and viscosity. When choosing a double cone dryer, you can refer to the slip angle of the material to select the angle of the cone.
Wuxi ZhangHua Machinery Co., Ltd. specializes in the production and sales of vacuum dryers, filter washing and drying three-in-one, washing and filtering two-in-one, crystallization equipment and liquid low-temperature vacuum dryers. Welcome to inquire: 13861731823