China Drying Network Spray-dried products are fine particles, easy to form dust, and must meet explosion-proof requirements when dry. The system must use a closed-cycle system, and the carrier must also use inert gas. At present, the domestic spray drying hot air inlet temperature is 250°C to 500°C in parallel operation, 200°C to 300°C in countercurrent operation, and the outlet temperature is generally controlled at 60°C to 100°C after atomization and drying, and its thermal efficiency is used. Lower, generally 30% to 50%, which is also the shortcomings of spray drying. At present, spray drying towers with waste heat recovery in foreign countries can achieve a thermal efficiency of 70%, but this equipment has economic significance only if the production capacity is greater than 100 kg (water)/hour. However, when a nitrogen carrier and organic solvent are used, a closed circulation system can be used to recycle nitrogen and condense the solvent, which can effectively reduce the production cost. The cost of the spray drying process also requires further study by equipment designers and producers to find better countermeasures to reduce costs. Eyelet Fabric,Cotton Eyelet Fabric,Wholesale Knit Fabric,Eyelet Fabric By The Yard SHAOXING BAOYING TEXTILE CO.,LTD , https://www.baoyingfabric.com