Ionized Airflow Granule Dust Removal
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Solution Overview
Problem
Existing methods for removing dust from bulk materials, such as granules, face challenges due to strong electrostatic adhesion between dust particles and granules, as well as between dust and device components, making it difficult to separate them effectively, especially with small particles.
Innovation Solution
A method involving a laminar airflow directed upwards to separate granules from dust, assisted by ionization to neutralize static charges, and a device with a granulate container design that allows granules to cycle back into the accumulation area, minimizing friction and abrasion, and utilizing negative pressure to remove dust particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical removal methods are used to separate dust from granules, then dust separation is attempted, but strong electrostatic adhesion prevents effective separation
Solution Approach 1:
The patent replaces mechanical removal methods with ionization technology. Instead of using mechanical forces to overcome electrostatic adhesion, the system uses ionized air to neutralize the electrostatic charges on dust particles and granules, eliminating the adhesive force and enabling easy separation.
Solution Approach 2:
The patent changes the electrical parameter of the dust particles and granules by introducing ionized air. This alters the electrostatic charge state from charged (adhering) to neutral (separable), fundamentally changing the interaction between particles and enabling effective dust removal.
2Productivity
If strong air flow is used to separate dust particles from granules, then dust removal is enhanced, but granules are also entrained and lost
Solution Approach 1:
The patent introduces ionized air as an intermediary substance that facilitates dust particle detachment without requiring strong mechanical or aerodynamic forces. The ionized air neutralizes charges, allowing dust to be gently removed while leaving granules undisturbed.
Solution Approach 2:
The patent replaces strong aerodynamic forces with electrostatic neutralization. Instead of using high-velocity air streams that would entrain granules, the system uses ionization to eliminate adhesive forces, enabling dust removal at low flow rates without granule loss.
3Manufacturing precision
If dust particles are mechanically removed from granules, then dust is separated, but additional dust is generated through granule abrasion
Solution Approach 1:
The patent replaces mechanical friction-based removal with electrostatic neutralization. By eliminating the need for mechanical contact and abrasion, the system removes dust particles without generating additional dust through granule wear.
Solution Approach 2:
The ionized air acts as a gentle mediator that detaches dust particles through electrostatic neutralization rather than mechanical force, preventing granule surface damage and avoiding the generation of abrasion-induced dust.
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
This approach effectively separates granules from dust, reducing mechanical removal challenges and minimizing dust generation, achieving efficient dedusting with high granule recovery and low re-entrainment, while maintaining a clean processing environment.
Implementation Method 1
ionization to neutralize static charges
Implementation Method 2
generating a per se known air flow directed from the bottom upwards, which is strong enough to disperse granules
Implementation Method 3
the force acting on the granules upwards decreases until gravity prevails
Implementation Method 4
the dust can usually only be removed mechanically when these binding forces, especially the so-called Lorentz force, have been eliminated
Data Source
Figure 1a~1b
Figure 2a
Figure 2b
AI summary
In order to remove dust, in particular the dust (11) adhering to the granulate grains (4), from the granulate (4), the granulate grains (4) are moved upwards out of the granulate collection on the base of the granulate intermediate container (9) via a preferably laminar air flow (32), in order to preferably prevent friction of the granulate grains (4) against one another, and to prevent the associated formation of new dust (11), until, under the influence of gravity, the granulate grains (4) drop back down laterally outside of the air flow (32) and fall back into the granulate collection (4). Simultaneously, a vacuum is applied above this air flow (32), in order to suction upwards the dust being removed from the granulate grains (4). Both together can be achieved by applying an, in particular controlled, vacuum at the air outlet opening (18) for the dust-laden air. In order to facilitate the removal of the dust (11) from the granulate grains (4), the air of the air flow (32) is ionised during or before reaching the granulate collection (4).