Corn seed drying process
Corn seed drying process is divided into four stages.
The first stage: drying for 8 hours, the temperature is 43 ℃, the circulating air circulates from the bottom to the top, and the temperature is raised rapidly.
The second stage: drying for 32 hours, the temperature is 42 ℃, the circulating air circulates from the bottom to the top. This stage is mainly to remove moisture, especially to avoid mold in the middle part of the material.
The third stage: drying for 20 hours, the temperature is 41 ℃, and the circulating air circulates from bottom to top. This stage is mainly focus on dehumidification.
The fourth stage: drying for 30 hours, the temperature is 40 ℃, and the circulating air circulates from top to bottom. This stage mainly improves the drying uniformity of materials through reverse blowing.
The economic value of corn seeds is far greater than the cost of the air source heat pump, and if the drying fails, the liability for compensation is huge. In the early stage of business and technical negotiation, enterprises need to comprehensively grasp the cost and risks of the project. If there are some uncontrollable elements, do experiments in small batches in advance, and have a deep understanding of the material characteristics (the moisture content of corn seeds in different regions is quite different). This could minimize the drying risk.