How to deal with overheating of materials dried by slag dryer

How to deal with overheating of materials dried by slag dryer is a common problem encountered by users who use slag dryer for the first time. The main reason is that they are not proficient in operation and cannot grasp it properly. If the quality of the dried materials changes, it will affect the production quality and must be dealt with quickly.

1. The air velocity in the drying chamber is too low, and the fog droplets on the outside are dried first when the fog group is dried. Because the initial velocity of the fog group is much higher than the air velocity, the dry powder enters the high temperature zone after the upward vortex occurs, which causes some products to deteriorate after being exposed to high temperature.

Solution: Increase the air velocity appropriately. Usually, there is a sight glass in the reversing part. Observe from here. If there is no upward vortex, it means that the air velocity is normal. Many operating examples recommend that this speed is around 0.5m/s.

2. The exhaust gas temperature is too high. Many slag drying products are mixed with the exhaust gas and finally separated. Therefore, the exhaust gas temperature directly affects the product temperature. There is a relative temperature difference between the two. Usually, the exhaust gas temperature is about 10 to 30 ° C higher than the product temperature. If the exhaust gas temperature is high, the product temperature must be high. If it exceeds the heat resistance temperature of the product, the product will overheat and deteriorate.

Solution: Control the exhaust gas outlet temperature of the drying equipment. The control method is to reduce the hot air inlet temperature or increase the spraying amount, so that the system establishes a heat balance relationship that satisfies the exhaust gas outlet temperature to ensure the temperature requirements of the product.

3. Before the slag dryer is operated, the operator must carefully understand all parts of the equipment, understand operation and maintenance, and carefully read the slag dryer operating procedures, so as to avoid such problems.