Dedusting Apparatus Using Ionizing Wires and Air Knives
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Solution Overview
Problem
Conventional dedusting apparatuses face challenges in effectively removing dust and debris particles from particulate materials, leading to contamination, production flaws, and safety risks due to electrostatic charges and friction-generated contaminants during transport and molding processes.
Innovation Solution
A dedusting apparatus with ionizing wires and a wash deck featuring vertical steps and air knives is used to ionize dust particles, facilitating their separation from the particulate material flow, eliminating the need for electromagnetic devices and allowing for a shallower wash deck orientation, reducing apparatus height and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional electromagnetic devices are used to separate dust particles, then dust removal capability is achieved, but device complexity and production cost increase
Solution Approach 1:
The patent replaces electromagnetic separation devices with a purely mechanical pneumatic system. Air knives generate high-velocity air streams that mechanically lift and remove dust particles from the particulate material flow, eliminating the need for complex electromagnetic fields and charged particle manipulation.
Solution Approach 2:
The invention employs pneumatic principles by introducing air knives that blow high-velocity air across the particulate material flow. This pneumatic action creates aerodynamic forces that separate dust particles from the heavier product particles, achieving dust removal through gas-fluid dynamics rather than electromagnetic forces.
2Object-affected harmful factors
If conventional wash deck orientation is used, then dust separation is effective, but apparatus height increases
Solution Approach 1:
The patent introduces air knives that operate in a horizontal dimension across the particulate flow, rather than relying solely on vertical gravity-based separation. This dimensional addition allows effective dust separation to occur in a more compact vertical space, reducing overall apparatus height while maintaining separation efficiency.
Solution Approach 2:
The wash deck is segmented into multiple sections with air knives positioned at different locations. This segmentation allows the separation process to occur in distributed stages across the deck, enabling more compact vertical arrangement of functional zones and reducing the overall height requirement compared to conventional single-stage designs.
3Speed
If friction occurs during particle transport, then electrostatic charge is generated, but dust particle attraction to pellet surface increases
Solution Approach 1:
The patent converts the harmful electrostatic effect into a beneficial separation mechanism. By allowing friction-generated electrostatic charges to accumulate on dust particles, the system then uses electrostatic precipitators to selectively attract and remove these charged particles, turning the originally harmful charge generation into a useful separation tool.
Solution Approach 2:
The invention changes the electrical parameter state of the dust particles through controlled charging processes. By adjusting the electrostatic field parameters in the precipitator section, the system optimizes the attraction force on charged dust particles while minimizing unwanted effects on the product material, effectively managing the electrostatic parameter to achieve separation.
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 enhances dust removal efficiency, reduces contamination-related production issues, and ensures safer handling of particulate materials by effectively neutralizing electrostatic charges and minimizing wear on equipment, resulting in higher-quality products and reduced maintenance costs.
Implementation Method 1
ionizing wires to help separate dust particles from the particulate material
Implementation Method 2
The air knife is directed into the flow of particulate material dropping over the wash deck step
Implementation Method 3
the wash deck being inclined to urge the flow of particulate material from the top of the wash deck to the bottom
Implementation Method 4
the air passing through the holes in the wash deck bubble up through the particulate material to separate the contaminants from the particulates
Implementation Method 5
Particulate material discharging off the lower end of the wash deck passes through a Venturi Zone where an additional flow of air removes the final contaminants
Data Source
AI summary
A dedusting apparatus removes dust and debris from particulate material flowing over the surface of a wash deck formed with steps and incorporating an air knife engaging the flow of particulate material as the material drops from one wash deck level to another. An ionizing wire is placed at each step on the wash deck so that the air knife blows negative ions from the ionizing wire into the particulate material falling off the step onto the level of wash deck below the ionizing wire. The wash deck is formed with openings to allow air to blow through the wash deck surface and remove dust and debris from the flow of particulate material. The wash deck can be constructed from modules supported on one another in a manner to present an overhang at each step. The wash deck can be formed from a flat pattern as a unitary bent structure.