Agricultural Material Separator for Corncob Recovery
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Solution Overview
Problem
Existing agricultural combines are inefficient in collecting corncobs, leading to loss and contamination, as they are difficult to pick up from the field and often mix with low-density, biodegradable stover, which is not economically justifiable to collect.
Innovation Solution
A system and method for an agricultural material separator that uses a combine with a corn header, a screen, and a conveyor system with a fan to separate and collect corncobs, reducing clogging and low-density material collection, and an auger to direct cobs to a storage container, allowing for retrofitting onto existing equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If corncobs are collected from the agricultural field after grain extraction, then corncob collection is achieved, but the cobs become contaminated with dirt or other material
Solution Approach 1:
The separator is integrated into the combine harvester to perform corncob separation at the time of harvesting, before the cobs reach the ground. This preliminary action prevents contamination by dirt and other field materials that would occur if cobs were collected after grain extraction.
Solution Approach 2:
A screening mechanism acts as an intermediary between the threshing process and the collection system. The screen separates corncobs from light stover and directs them to a collection container, preventing direct contact with contaminated field surfaces while enabling efficient collection.
2Quantity of substance
If all stover is collected for energy conversion, then energy content is maximized, but the collection becomes economically unjustifiable due to low density
Solution Approach 1:
The separator extracts only the high-density corncobs from the mixed stover material, leaving the low-density, fluffy stover to be returned to the field. This selective extraction focuses collection efforts on the economically valuable portion of the biomass, improving productivity and economic efficiency while still capturing significant energy content.
Solution Approach 2:
The system applies different handling approaches to different portions of the stover based on their local properties: high-density corncobs are collected for energy conversion, while low-density stover is returned to the field for biodegradation and nutrient replenishment. This local quality differentiation optimizes both economic efficiency and environmental benefits.
3Object-affected harmful factors
If light stover is returned to the field, then biodegradation and nutrient replenishment are enhanced, but corncob collection efficiency decreases
Solution Approach 1:
The screening mechanism extracts and separates corncobs from the light stover stream, directing corncobs to the collection container while allowing stover to be returned to the field. This extraction process maintains high collection efficiency for corncobs while preserving the environmental benefits of stover return.
Solution Approach 2:
The system segments the stover material into two distinct streams: high-density corncobs for collection and low-density light stover for field return. This segmentation enables simultaneous achievement of efficient corncob collection and environmental benefits from stover decomposition.
4Manufacturing precision
If a screening system is used to separate corncobs from stover, then separation efficiency is improved, but device complexity increases
Solution Approach 1:
The system uses a fan-generated air stream to lift and separate light stover from heavier corncobs on a screen. This pneumatic approach achieves effective separation using simple, proven technology rather than complex mechanical sorting mechanisms, improving separation efficiency while minimizing added device complexity.
Solution Approach 2:
The screening system leverages the inherent density differences between corncobs and stover, using the fan-induced air flow to automatically separate the materials based on their physical properties. This self-service approach achieves efficient separation without requiring complex control systems or additional processing steps.
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 system effectively reduces corncob loss, minimizes clogging, and collects high-density corncobs while returning low-density stover to the field, enhancing energy generation potential and reducing contamination.
Implementation Method 1
a conveyor through which a fan blows air to remove low density material from the chaff
Implementation Method 2
An auger is provided below the conveyor to collect cobs as they pass from the screen
Data Source
AI summary
A combine is provided with an improved system for collecting agricultural material, such as stover, from an agricultural field and separating desired parts of the stover, such as corncobs, from undesired parts. The combine is provided with a system for moving the desired portion of the stover to a container and discarding the undesired portion of the stover back on the agricultural field.