Grain dryer is an important agricultural equipment, specially used to dry high-humidity grains, grains, seeds and other agricultural products to a state suitable for storage or processing. This kind of equipment plays a vital role in agricultural production and food processing industry, and can effectively improve the quality and storage performance of grain, thereby improving people's living standards.

The working principle of the grain dryer is to use heat energy to evaporate the moisture in the agricultural products and discharge it from the outside of the machine through the exhaust system to achieve the drying effect. It usually consists of heating system, conveying system, control system and exhaust system. During operation, the agricultural products that need to be dried are moved to the heating area through the conveyor system. The heating system provides heat energy to increase the internal temperature of the dryer, thus promoting the evaporation of water. The control system is responsible for monitoring and adjusting the temperature, humidity and other parameters of the dryer to ensure that the environment inside the dryer meets the requirements for drying agricultural products.

Grain dryers usually use rotary heating devices, which can generate a large amount of hot air in a short period of time, kill insect eggs through high-temperature treatment, and solve the discoloration phenomenon that may occur during the grain drying process. At the same time, it can also maintain the color, aroma, taste and nutritional content of the original product, making the product have a longer shelf life. In addition, the grain dryer also has the advantages of energy saving and environmental protection, and can be widely used for drying various grains, such as wheat, corn, soybeans, etc.

The grain dryer has a long service life, low maintenance cost, simple operation and easy cleaning. It can not only ensure farmers' harvest and grain storage, but also reduce traffic hazards, reduce grain impurity rates, and improve grain quality. The application of grain dryers can effectively improve the efficiency of agricultural production and food processing industry, save energy and protect the environment.

In summary, grain dryers have broad application prospects in the fields of agricultural production and food processing, and are of great significance for improving grain quality, ensuring food security, and promoting sustainable agricultural development.