Vertical Grain Dryer with Segmented Airflow Modules
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Solution Overview
Problem
Conventional grain dryers face issues such as high energy consumption, poor drying quality due to overheating, and increased risk of grain cracking, along with inefficient air circulation and surface contact, leading to suboptimal drying processes.
Innovation Solution
A grain dryer with a vertical main structure divided into modules, featuring a preheating chamber and a programmable logic controller that manages air flow and temperature-humidity conditions to optimize drying, reducing energy consumption and improving grain quality by controlling moisture evaporation and cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional column dryers with perforated sheets are used to enable air circulation through grain columns, then large spaces for drying air entry are provided, but the grain becomes overheated against the column faces and requires high air backpressure leading to high energy consumption
Solution Approach 1:
The grain mass is segmented into multiple columns separated by vertical partitions, allowing air to circulate through multiple pathways. This segmentation reduces the backpressure on each individual column while maintaining large total air entry spaces, thereby reducing energy consumption without compromising drying effectiveness
Solution Approach 2:
The invention introduces horizontal air circulation pathways in addition to vertical grain flow, creating a multi-dimensional air-grain interaction. Air enters through side openings and circulates horizontally through the grain mass, providing drying surface area without requiring high backpressure through perforated sheets
2Speed
If dividing floors are placed to reverse air circulation direction in column dryers, then air flow is improved, but the grain next to the perforated sheet overheats causing poor drying quality and high cracking rate
Solution Approach 1:
Different regions of the grain mass are exposed to different air flow conditions. The vertical partitions create zones where grain is protected from direct high-velocity air impact, while still receiving adequate drying air through the segmented pathways, ensuring uniform drying quality throughout the grain mass
3Productivity
If compact grain masses are formed inside columns to increase drying capacity, then more grain can be processed, but the circulation of drying air is hindered reducing drying efficiency
Solution Approach 1:
The grain mass is divided into multiple columns through vertical partitions, creating segmented pathways that maintain adequate air circulation speed while increasing total drying capacity. Each column processes grain independently, allowing parallel air flow through multiple channels rather than one congested pathway
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 solution significantly reduces energy consumption while enhancing grain quality by ensuring ideal drying conditions, achieving faster and more efficient drying with lower residual moisture and cracking rates.
Implementation Method 1
a fan (107) is provided which is arranged transversely to the vertical partition and adjacent between contiguous modules
Implementation Method 2
which are heated by systems of burners or heaters in general
Implementation Method 3
it goes through the mass of grain and drags with it moisture contained in it
Data Source
AI summary
Grain dryer of the type comprising a vertical main structure consisting of a central body through which the grain to be dried passes, a front hot air intake chamber and a rear used air outlet chamber, being that the main body has in its upper part an entrance from where wet grains are loaded, underneath which there is a loading hopper that communicates with the central body, wherein the grain descends along the central body within which it is dried during its fall by a flow of hot air that passes through the mass of grain, finally exiting through a discharge hopper arranged at the lower end of the dryer, the dryer of the invention being characterized in that it allows to significantly reduce the energy consumption in order to obtain a better quality of grain and a process much faster than conventional ones due to the arrangement of one or more preheating chambers without extraction of moisture from the grain.