Drying of industrial and agricultural products 
Grain, food, vegetables, traditional Chinese medicine, towels, clothes, paint processing, and many other products require drying treatment. Traditional methods such as boiler hot air and heating lamp coal not only consume high energy but also affect the quality of the dried products. Using solar hot air drying not only saves energy and is environmentally friendly, but also improves the quality of the dried products. 
Environmental heating 
Hot air can be used for indoor heating and greenhouse construction. In certain special environments, solar energy can be used to heat soil. 
Application of solar powered sludge drying 
The annual sludge production in Chinese cities reaches 30 million tons, with a moisture content of 80%, and the market prospects for sludge treatment are very broad. The solar air collector absorbs solar radiation energy, converts it into hot air, and sends it into the drying room through a fan to dry the sludge. The dried sludge is crushed, collected, and reused. The heat generated by solar drying is readily available, highly efficient, and inexhaustible. And the operating costs are very low.