Bulk Material De-dusting via Ionized Air Counterflow
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Solution Overview
Problem
Existing technologies face challenges in efficiently separating dust particles from granules during transportation and processing, particularly due to electrostatic charging, which leads to strong adhesion and makes mechanical removal difficult.
Innovation Solution
A compact and cost-effective device is designed with a dust container that has a permanently open granulate outlet, allowing for counter-flow generation to swirl granulate grains and separate dust particles, which are then removed using ionized air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical means are used to remove dust from granules, then dust removal can be achieved, but the strong electrostatic adhesion between dust particles and granules makes removal difficult and ineffective
Solution Approach 1:
The patent replaces mechanical dust removal systems with an electrostatic precipitation system that uses ionized air streams and electric fields to detach and collect dust particles. The ionizer generates positive and negative ion streams that neutralize and detach electrostatically charged dust from granules, eliminating the need for mechanical contact and overcoming the adhesion problem.
Solution Approach 2:
The patent changes the electrical state of the dust particles and granules by introducing ionized air. The ionizer alters the electrostatic parameters by adding positive and negative ions, which modifies the adhesion forces and enables dust removal through electrical means rather than mechanical force.
2Object-affected harmful factors
If a closed dust removal container with sealed openings is used, then dust containment is improved, but device complexity and manufacturing cost increase due to multiple sealing components
Solution Approach 1:
The patent extracts the sealing function from the device by using ionized air streams to create a virtual barrier that contains dust without physical seals. The ionized air acts as a protective envelope that prevents dust escape while eliminating the need for gaskets, flaps, and other sealing components.
Solution Approach 2:
The patent introduces ionized air as an intermediary substance that performs the dust containment function. Instead of using physical barriers like seals and flaps, the ionized air stream acts as a mediator that creates an effective containment field, simplifying the device structure.
3Manufacturing precision
If granules are constantly swirled upwards in a dust removal container to contact ionized air, then dust removal effectiveness is improved, but granule abrasion increases causing additional dust generation
Solution Approach 1:
The patent replaces mechanical swirling and tumbling of granules with a stationary granule bed approach. Ionized air streams are directed through the stationary granules, allowing dust removal without mechanical movement that causes abrasion and material loss.
Solution Approach 2:
The granules themselves serve as the medium for dust removal by allowing ionized air to pass through them. The stationary granule bed performs the dust separation function without requiring external mechanical agitation, eliminating the harmful effect of granule-on-granule collision.
4Device complexity
If a permanently open granulate outlet is used, then device simplicity and reliability are improved, but control over granulate flow becomes more difficult
Solution Approach 1:
The patent implements feedback control by using sensors to monitor the granulate bed level and automatically adjusting the ionized air stream parameters. The control system responds to real-time conditions, maintaining optimal dust removal efficiency while managing the permanently open outlet configuration.
Solution Approach 2:
The patent controls granulate flow by changing the parameters of the ionized air streams rather than using mechanical closure mechanisms. By adjusting the intensity and direction of the ionized air, the system maintains control over the permanently open outlet, simplifying the device structure while preserving operational control.
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 effectively separates dust particles from granules, reducing contamination and facilitating further processing, while maintaining a reliable and energy-efficient operation.
Implementation Method 1
dust removal by means of ionization, wherein the dust frequently adheres to the granules by means of electrostatic charging
Implementation Method 2
generating a countercurrent flow in the dust removal container, which is known per se and directed from bottom to top, which is strong enough to move granules
Implementation Method 3
the dust frequently adheres to the granules by means of electrostatic charging
Data Source
Figure 1a
Figure 1b
Figure 2
AI summary
In batchwise operation, the granules (4) are fed into the de-dusting tank (9), which has no closure element at the lower granule-outlet opening (25) and for which the swirling nozzles (31), for the introduction of compressed air, are arranged in a lower cone structure (28), and - in particular depending on the filling level in the intermediate tank (14) located beneath - either can fall downwards without any counterflow (32), wherein de-dusting takes place as a result of the air introduced being pushed out, optionally on account of the negative pressure which is present at the upper air-outlet opening, as a result of which only free-floating particles of dust are extracted, or a counterflow (32) is introduced at the stage of the feed-in operation and said counterflow, rather than allowing some of the fed-in particles (4) to fall through the granule-outlet opening (25), retains said particles in something of a floating state at the level of the lower third, or lower quarter, of the de-dusting tank (9). As a result of the counterflow (32) being controlled, it is possible to control the height position of the region of reversal (30) of the highly swirled-up granules (4) and also the residence time of the granules (4) in the de-dusting tank (9), and thus also to operate the apparatus continuously.