Grain Dryer with Angled Baffles and Diverters
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Solution Overview
Problem
Existing grain dryers suffer from uneven and inconsistent grain drying due to heated air currents, leading to capacity and efficiency deficiencies.
Innovation Solution
A grain dryer design featuring a pair of heating columns with angled containment baffles and grain diverters, along with a vacuum heat recovery system, to ensure even airflow and heat distribution across the grain column.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If heated air currents are used to dry grain, then drying speed is improved, but uneven and inconsistent grain drying occurs
Solution Approach 1:
The heating column is divided into multiple segments with containment baffles at different heights, creating separate drying zones. Grain is segmented into columns by the baffles, ensuring each grain particle is exposed to heated air uniformly rather than being subjected to chaotic air currents.
Solution Approach 2:
The containment baffles create a controlled environment where heated air is distributed evenly across all grain particles in the column. This eliminates the potential differences in heat exposure that cause uneven drying, ensuring all grain experiences the same drying conditions.
2Productivity
If cross-flow drying with perforated screens is used, then airflow through grain is improved, but screens become plugged requiring frequent cleanings
Solution Approach 1:
The invention removes the perforated screens entirely from the drying system. Instead of using screens to create airflow paths, the system uses containment baffles that guide grain into columns while allowing air to flow through the grain particles themselves, eliminating the screening function that causes plugging.
Solution Approach 2:
The containment baffles serve as intermediaries that organize grain into columns without requiring perforated screens. The baffles create the necessary structure for airflow while the grain particles themselves serve as the medium through which air passes, eliminating the need for screens that can become blocked.
3Ease of operation
If grain is held in columns with perforated screens, then airflow distribution is improved, but screen plugging reduces reliability
Solution Approach 1:
The system segments grain into vertical columns using containment baffles rather than relying on perforated screens. This segmentation maintains good airflow distribution while eliminating the screens that cause plugging and reliability issues.
Solution Approach 2:
Containment baffles act as intermediaries that organize grain into proper drying columns without requiring perforated screens. The baffles provide the structural function of column formation while allowing air to pass through the grain naturally, improving reliability by removing the failure-prone screens.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves more uniform grain drying, improving dryer capacity, fuel efficiency, and grain quality by ensuring consistent exposure to heated air.
Implementation Method 1
a heater, wherein air is heated by the heater as the air is being pulled into the upper plenum
Implementation Method 2
At least one fan takes a suction from the ductwork to draw heated air from the upper plenum through the heating column
Implementation Method 3
Grains such as wheat, corn, soybean, and other agricultural products such as nuts, often need to be dried after harvesting to achieve a moisture content adequate for inhibiting microbial growth during storage
Data Source
AI summary
A grain dryer has a pair of heating columns with an upper plenum in communication with the pair of heating columns. Each heating column has an inner boundary and an outer boundary being formed with a plurality of angled containment baffles configured to funnel grain down the heating column while allowing heated air to be drawn from the upper plenum through the grain. The grain dryer has a plurality of grain diverters mounted longitudinally at regular height intervals between the containment baffles forming the inner boundary and the containment baffles forming the outer boundary. Each grain diverter is shaped to form a downward facing nook that forms a void in the grain as the grain flows down the heating column.