Corn requires high temperatures for effective drying, typically between 110°C to 125°C, depending on the initial moisture content. This crop is especially moist in northern climates, making the drying process fuel-intensive. Therefore, for gas-fueled dryers, the most efficient grain dryers for corn should be equipped with the following systems:
- Heat Recovery System: This system harnesses the air from the cooling zone of a continuous grain dryer. As the dry grain cools, it heats the air in the cooling zone, making it warm yet still dry. This warm, dry air is then redirected back to the burner, enhancing fuel efficiency by conserving gas.
- Heat Recirculation System: This system utilizes the air from the lower sections of the drying zone in a grain dryer. Since the grain in these lower sections is already quite dry, it releases minimal moisture. Meanwhile, the air in this area remains quite hot. By reusing this hot air, the system additionally reduces gas consumption, enhancing overall energy efficiency.
There are also grain dryers, like those from Scolari, that feature two independent drying zones. In the upper zone of these dryers, it is possible to utilize the highest temperatures (up to 140°C) without damaging the grain. Using such high temperatures can reduce the specific fuel consumption per ton of grain and also increase the productivity of the grain dryer.
For grain dryers that utilize alternative fuel types with a heat exchanger, it may be crucial to select a dryer that does not incorporate heat recovery and heat recirculation systems.
However, if you operate a small farm, large dryers may not be suitable due to the additional investments required to manage a continuous grain dryer. Instead, a batch recirculating grain dryer may be more appropriate. Although these dryers cannot utilize the fuel-saving systems described above, they remain efficient and offer a quick return on investment.
To choose the most suitable corn dryer for your specific needs, please do not hesitate to contact us at +380 (67) 658-0767.