Seed Coating Device Perforated Metal Sheet Airflow
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Solution Overview
Problem
Existing seed coating devices emit dust during operation, posing health risks and causing inefficiencies due to clogging of annular screening surfaces, which results in reduced performance.
Innovation Solution
A device with a perforated metal sheet having obliquely rising projections that form inclined openings for hot air flow, reducing seed grain abrasion and dust emission, and featuring a cylindrical housing with a rotatable truncated cone and guide vanes for uniform coating and drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an annular screening surface is used for hot air flow, then drying efficiency is improved, but dust emission increases and the surface becomes clogged
Solution Approach 1:
The separating unit features a differentiated structure: the outer face has projections creating inclined openings for efficient hot air flow, while the inner face remains smooth to minimize seed grain abrasion and dust generation. This local quality differentiation resolves the contradiction between drying efficiency and dust emission.
Solution Approach 2:
The projections on the outer face create rounded, inclined opening inlets that guide hot air flow smoothly, reducing turbulence and preventing dust particles from being ejected into the chamber. The curved geometry of the projections optimizes airflow while minimizing harmful dust emission.
2Productivity
If an annular screening surface is used for hot air flow, then drying efficiency is improved, but the surface becomes clogged over time
Solution Approach 1:
The separating unit features a differentiated structure: the outer face has projections creating inclined openings for efficient hot air flow, while the inner face remains smooth to minimize seed grain abrasion and dust generation. This local quality differentiation resolves the contradiction between drying efficiency and dust emission.
Solution Approach 2:
The projections on the outer face create rounded, inclined opening inlets that guide hot air flow smoothly, reducing turbulence and preventing dust particles from being ejected into the chamber. The curved geometry of the projections optimizes airflow while minimizing harmful dust emission.
3Object-generated harmful factors
If a smooth separating surface is used, then dust emission is reduced, but hot air flow efficiency decreases
Solution Approach 1:
The separating unit features a differentiated structure: the outer face has projections creating inclined openings for efficient hot air flow, while the inner face remains smooth to minimize seed grain abrasion and dust generation. This local quality differentiation resolves the contradiction between drying efficiency and dust emission.
Solution Approach 2:
The separating unit is segmented into distinct functional zones: the outer face with projections for optimized airflow, and the inner face for minimal abrasion. This segmentation allows each surface to be optimized for its specific function without compromise.
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
Significantly reduces dust emission and extends the operating life of the air-permeable separating unit by minimizing seed grain abrasion and clogging, while ensuring efficient seed coating and drying with a closed air circuit for energy-efficient drying.
Implementation Method 1
Through the opening inlet, the hot air moves from the air duct into one of the openings in the perforated metal sheet and then flows through an opening outlet of the opening into the chamber
Implementation Method 2
A significantly reduced abrasion of the individual seed grains wetted or coated with the dressing solution can thus be achieved, which rub along the perforated metal sheet during the operation of the device
Implementation Method 3
This device includes a rotating system for mixing seeds and dressing solution in the form of a rotor that is rotatable about a vertical axis of rotation. Seeds are set in rotation and mixed in the chamber by the rotor
Implementation Method 4
The air treatment system has a filter unit for dust separation
Implementation Method 5
Then, the air cleaned in this manner reaches a water separator, with water being separated by condensation, preferably through lowering the temperature
Implementation Method 6
Then, the cleaned and dried air reaches an air heating device in order to bring it back up to the intended drying temperature
Data Source
AI summary
A device for coating seeds with a liquid dressing solution, including a housing delimiting a chamber for accommodating the seeds, a rotating system for mixing the seeds and the dressing solution, an air duct for feeding hot air into the chamber and a separating unit which is permeable to the hot air and separates the air duct from the chamber. According to this invention, the separating unit includes at least one perforated metal sheet that has an inner face facing towards the chamber, an outer face facing towards the air duct and a plurality of projections, wherein a projection rises obliquely in the direction of the outer face and forms an opening inlet, which is inclined to the metal sheet plane, on the outer face. This invention further relates to a method in which the device is used.