When using a slag dryer, sometimes the drying material may overheat. This is a problem that users who are new to the slag dryer often encounter, mainly caused by unskilled operation and inadequate grasp. If the quality of the dried material is changed, it will affect the quality of the finished product, and it is necessary to deal with it quickly.

  1. The air velocity in the drying room is too low, and the fog droplets on the outside will be dried first when the fog group is drying. Because the initial velocity of the fog group is much higher than the gas velocity, the dry powder enters the high temperature area after the up-swirl flow occurs, which will cause some products to experience the appearance of metamorphosis after experiencing the high temperature.

  Solution: Appropriately increase the gas velocity. Usually there are sight glasses in some of the reversals, from here to investigate, if there is no up-swirl, the gas velocity is normal. Many operation examples recommend this speed to be around 0.5m/s.

  2. The tail temperature is too high, and many dried slag products are trapped with the tail gas and finally separated. Therefore, the temperature of the tail gas directly affects the temperature of the product, and there is a relative temperature difference between the two. Generally, the exhaust gas temperature is about 10 to 30°C higher than the commercial temperature. If the exhaust gas temperature is high, the temperature of the product must be high. If the heat-resistant temperature of the product is exceeded, the product will overheat and degenerate.

  Solution: Control the exhaust gas outlet temperature of the drying equipment. The control method is to lower the hot air inlet temperature or add spray liquid, so that the system establishes a heat balance link that satisfies the exhaust gas outlet temperature to ensure the temperature demand of the product.

  3. Before the slag dryer is operated, the operator must carefully understand all parts of the equipment, know how to operate and protect it, and carefully read the operating procedures of the slag dryer, so as to prevent such problems from occurring.

  Zhengzhou Jiutian Machinery is a professional manufacturer of slag dryers. It is very professional in slag dryer technology. If customers encounter questions in the process of using slag drying equipment, please feel free to contact us.