It only takes a few seconds for a closed-loop drying tower to dry completely. Since the equipment adopts a parallel-flow spray drying form, the droplets and the hot air can flow in the same direction. Although the temperature of the hot air is high, the hot air immediately contacts the spray droplets in the drying chamber, and the indoor temperature drops sharply, while the wet-bulb temperature of the material remains basically unchanged. Therefore, it can also be used to dry heat-sensitive materials.
For users, the entire processing process of the closed-loop drying tower is also very simple and easy to control. Overall, the application of the closed-loop drying tower reduces the production process and simplifies the production process. For the particle size, bulk density, and moisture of the product, within a certain range, the operating conditions can be changed to adjust, and control and management are very convenient. However, there are common phenomena of wall sticking and low purity of finished products with many impurities in production. How should we deal with it?
Causes of wall sticking:
1. The feed volume is too large, resulting in inadequate evaporation.
2. The drying chamber is not heated enough before the spraying starts.
3. When the spraying starts, the feed flow rate is adjusted too large.
4. The added liquid is unstable.
Methods for dealing with wall sticking:
1. Appropriately reduce the feed amount of the closed-loop drying tower.
2. Appropriately increase the inlet and outlet temperatures of the hot air.
3. When starting to spray, the flow rate should be small, gradually increase it, and adjust it to the appropriate time.
4. Check whether the pipeline is blocked, adjust the solid content of the material, and ensure the fluidity of the liquid
Reasons for impurities and low purity:
1. Poor air filtration effect.
2. Accumulated powder mixed into the finished product.
3. The purity of the raw materials is not high.
4. The closed-loop drying tower is not cleaned thoroughly.
Methods to solve the problem of impurities and low purity:
1. Check whether the air filter material configured in the closed-loop drying tower system is laid evenly, whether the filter has been used for too long, and replace it immediately if necessary.
2. Check the coke powder at the hot air inlet to overcome the vortex.
3. The liquid should be filtered before spraying.
4. Reclean the closed-loop drying tower.
