Production Dryers
Similar to a traditional single pass unit with the exception that heated air from the fan is reversed from upward air to downward air in the middle of the drying process. This reduces variations in moisture content of the bin load and tends to increase the energy efficiency compared to a conventional single pass unit.
The system is designed to utilize standard external blowers or internally mounted plenum fans. Air door configuration allows simple one step reversal of each bin from the ground level. The integral ductwork design simplifies sidewall sheeting installation. Dryers can also be equipped with optional partial air recirculation to reduce heating fuel requirements during cool weather operation.
AEC takes great pride in making almost every component in our steel dryers. From the individual panels to the fire control panels, we ensure that every piece that leaves our door is inspected to meet our strict quality control standards. AEC drying systems will improve the quality of your product, reduce your start up cost and decrease overall drying cost.
Standard burner designs are available for natural gas, propane or fuel oil heat. Gas trains and state of the art fire control systems are assembled in our electrical shop, which is UL listed for flame management systems. Our fire control panels and modulation systems ensure that energy efficiency is always achieved thus reducing operating cost.
Available options include powered doors, upgraded controls, and computerized data acquisition systems.
Advantages
Reduced air handling problems – AEC’s unique air plenum design reduces air handling problems inherent in many other systems. The blending chamber, air passage and balanced inlet design provide more uniform air temperature and velocity throughout the bin. Drying air is exhausted through an independent exhaust port eliminating the potential for uncontrolled moist air recirculation into fan inlet. Fill doors can also be closed during normal operation.
- Independent bin fans and burners
- Consistent dryer control
- Cyclonic air blending systems
- Unique balanced air plenum
- Extended air travel distance
- Pivoting air diverter control
- Easy one step air reversal
- Separate fill and exhaust ports
- Eliminates recirculation
- Can use single bins as necessary
- Can be expanded at any time
Double Pass Reversing Dryer
Two rows of seed bins are arranged along two central air plenums. Fans blow heated air through bins of relatively drier seed; the same air is then redirected upward through higher moisture bins and then into the atmosphere. As a bin dries, it becomes a low moisture bin and the air doors are switched to continue the cycle.
AEC takes great pride in making almost every component in our steel dryers. From the individual panels to the fire control panels, we ensure that every piece that leaves our door is inspected to meet our strict quality control standards. AEC drying systems will improve the quality of your product, reduce your start up cost and decrease overall drying cost.
Advantages
Higher efficiency – Double pass dryers are more efficient since exhaust air always passes through high moisture seed prior to being vented to the atmosphere; this air is much closer to maximum saturation than air leaving a single bed of nearly dry seed. A given volume of air will remove more moisture if allowed to become fully saturated making better usage of expensive heated air. This system is necessary when large airflows are used to avoid incurring enormous drying costs.
Less seed damage – Warm air passes through dry seed first, picking up moisture. The resulting evaporative cooling reduces the air temperature below 95 degrees, which is generally considered safe for higher seed moistures. This tempering allows the use of air temperatures up to 110 degrees to finish drying the seed quickly without subjecting the seed to damaging temperatures at high moistures.
More dryer control – Bypass doors valve air from the upper to lower tunnels allowing the operator to adjust for imbalanced bin numbers and to reheat the lower air to the maximum safe temperature for high moisture seed.
