Most of the drying failures of spray drying equipment are caused by the adjustment of the air volume or wind pressure of the inlet and exhaust fans. Generally, the air volume is low and the wind pressure is low. The result is that the negative pressure of the main tower is too low. The wind temperature is too high, resulting in an increase in the water content of the product. Reasonable adjustment of the inlet and outlet fans can effectively improve drying efficiency and reduce production energy consumption. The common spray drying equipment has two receiving devices: a bag filter and a cyclone. The two receiving devices need to correspond to different fan settings. Cyclone separator: The use of cyclone separators as the aggregate device is the most common combination. Generally, the resistance of the cyclone separator is higher than the resistance of the bag, and the power consumption of the induced draft fan is relatively large. Therefore, in general, the air pressure of the draft fan of the cyclone separator is higher than that of the bag. According to experience, after reducing the wind pressure of the induced draft fan minus the resistance of the cyclone and its pipeline, it should be greater than the wind pressure of the inlet fan. Therefore, the air volume can be calculated by 1.4 times the air volume of the intake fan. Single-stage bag filter: First, it is necessary to calculate the heat quantity of the material and obtain the air volume value of the inlet fan to determine the wind pressure. In the spray drying equipment system of the single-stage bag filter, the resistance of the fan to the air into the drying chamber can be mainly divided into three aspects: 1 air filter: mainly the resistance of the filter material; 2 pipeline and hot air distributor; Heater. Generally, the wind pressure of the inlet fan is set to 2000~2500Pa; the wind pressure is 2100~2300Pa. Since the drying process of the spray drying equipment is completed under a negative pressure, the induced draft fan needs special attention. The resistance of the bag needs to be considered when selecting. After calculation, the partial pressure of the induced draft fan is 2500~3000Pa, and the air volume is generally 1.3 times that of the inlet fan, so it is 32500m?/h. There are many measures to reduce the energy consumption of spray drying equipment. Spray drying equipment according to different models and different application ranges has corresponding energy saving measures. The conventional energy-saving methods can be summarized as follows: Increase the temperature of the drying medium from the air inlet of the spray drying equipment. According to the statistics of the test data, if the temperature of the drying medium of the feed port is appropriately increased, the thermal efficiency can be effectively improved. Increasing the temperature depends on the nature of the product. Reduce the evaporation load. The evaporation load of the spray drying equipment is too large, indicating that the solid content in the material is low. This will greatly reduce the thermal efficiency of the dryer. Appropriately increase the solid content of the feed liquid to reduce the evaporation load of the spray drying equipment. Reduce the air temperature. When the temperature of the outlet is too high, it is unfavorable to save energy and reduce emissions. After statistics, we found that reducing the temperature of the outlet is more economical than increasing the inlet air temperature.