Grain drying mechanization technology is a drying technology that uses machinery as the main means, adopts corresponding processes and technical measures, artificially controls factors such as temperature and humidity, and reduces the moisture content in grain without damaging its quality, so as to meet national safety storage standards. Grain drying is an important step in agricultural production, a critical link in grain production, and an important component of achieving full mechanization of grain production.

Technical Points

1. Choose dry conditions. The so-called drying conditions refer to the sum of the main influencing factors during the drying process. It should be determined correctly based on the type, purpose, and moisture content of the dried material. If the original moisture content is high, the heat treatment time will be longer, and the selected temperature will be higher; Vice versa.
2. Control the maximum temperature. The temperature of roasted grains for planting should not exceed 43C; for edible and industrial grains, it should not exceed 50C, and the maximum temperature should not exceed 60C.
3. Pay attention to tempering after drying. After drying, the quality of rice and corn will improve after slow soaking, so it is important to pay attention to the slow soaking time. The shortest time for rice to recover is 60 minutes.
4. Improve the quality of homework. Reasonably select drying varieties (planting grains, edible and industrial grains) and their applicable range (grain damage rate appreciation ≤ 0.5%), and under environmental conditions suitable for normal production operations, ensure that the limited indicators of grain precipitation amplitude and drying quality (grain bursting rate, corn cracking rate) reach a reasonable range:
① Precipitation amplitude ≤ 0.5%; Uneven moisture content ≤ 1%; Grain burst rate increase ≤ 3%; The increase in corn cracking rate is ≤ 20%.
② 5% ≤ precipitation amplitude ≤ 10%; Uneven moisture content ≤ 1.5%; Grain burst rate appreciation ≤ 5%; The increase in corn cracking rate is ≤ 25%.
③ 10% ≤ precipitation amplitude ≤ 15%; Uneven moisture content ≤ 2%; Grain burst rate appreciation ≤ 7%; The increase in corn cracking rate is ≤ 30%.
④ Precipitation amplitude (divided into 2 drying stages) ≥ 15%; Uneven moisture content of 1.5%; Grain burst rate appreciation ≤ 8%; The increase in corn cracking rate is ≤ 35%.

Daily maintenance precautions

1. Timely maintenance. Clean and maintain during idle drying time. Cleaning up residual grains, closing the inlet and outlet, etc., is beneficial for improving the service life of machinery and the efficiency of drying operations.
2. Reasonable load. The grain loading meets the requirements and achieves energy-saving operations. Excessive loading can easily cause blockage; Insufficient loading not only reduces operational efficiency, but also affects drying quality.
3. Low impurity content. Grains should have less impurities, with a impurity rate of ≤ 2%, and should not contain impurities larger than 25mm x 25mm in size. Too many impurities can cause poor grain circulation, resulting in uneven drying and even fermentation, while also increasing electricity and fuel consumption and reducing efficiency.