The NAISIDA team provides constant temperature and humidity control services for the Guizhou Batian Tower Compound Fertilizer Project. The new air pipeline gas temperature control and dehumidification. The production process is to transport powdery materials in the pipeline. When the fresh air enters the pipeline, the outdoor temperature is also high. The introduction of humid air into the pipeline causes the powdery materials in the pipeline to absorb moisture, which has a high moisture content, which affects the quality of the materials; combined with the site, our company provides professional technical solutions and recommends the use of Nesda air-to-air heat exchange dehumidification units with an air volume of 45000m³ /h, adopts total heat recovery, evaporation and condensation, and multi-air duct ventilation. After installation, the air supply index of the pipeline is stably controlled at a temperature <22℃, humidity <50%RH, and water content <10g/kg, which can meet the requirements of the pipeline The air drying value, the material does not produce moisture regain, and the product quality is guaranteed.