Liberation and Separation Device with Airflow Generator
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Solution Overview
Problem
Existing liberation and separation devices lack control over operational variables such as particle falling speed and ballistic properties, often miss light particles like dust, and are inefficient in handling dust due to air shells surrounding the rotor.
Innovation Solution
The device employs an airflow generator to create a low-pressure zone in the particle contact area using the Magnus effect, allowing for controlled adjustment of particle falling speed and suction force, ensuring all particles reach the rotor blades, including dust, through an open rotor design and strategic suction devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air shell surrounds the rotor to protect particles, then particles are protected from direct impact, but light particles like dust cannot reach the particle contact area and are missed by the rotor blades
Solution Approach 1:
Instead of using positive pressure to push particles toward the rotor, the invention uses negative pressure (suction) to draw particles toward the particle contact area. The airflow generator creates a low-pressure zone that actively pulls dust and light particles into the rotor's path, reversing the traditional approach of relying on particle momentum alone.
Solution Approach 2:
The invention introduces air flow as an intermediary medium between the rotor and particles. This air flow serves as a carrier that transports dust particles to the particle contact area, enabling dust processing without requiring direct mechanical contact between dust particles and the rotor during the transport phase.
2Productivity
If the rotor operates at high speed to process particles efficiently, then particle separation is improved, but control over operational variables such as falling speed and ballistic properties is reduced
Solution Approach 1:
The invention makes the system dynamically adjustable by introducing an airflow generator that can independently control air flow rate and pressure. This allows the operational characteristics to be dynamically tuned based on particle properties and processing requirements, enabling optimization of both separation efficiency and control precision without being locked into fixed high-speed operation.
Solution Approach 2:
The invention changes the physical parameters of the particle transport environment by controlling air flow rate, pressure, and velocity. By adjusting these pneumatic parameters, the system can optimize particle delivery to the rotor while maintaining control over operational variables, rather than relying solely on mechanical speed adjustments.
3Reliability
If the rotor is designed with a closed structure to contain particles, then particle containment is improved, but dust particles cannot be efficiently handled and removed
Solution Approach 1:
The invention extracts dust particles from the main particle stream by creating a separate air flow path. The airflow generator draws dust particles into a dedicated low-pressure zone where they can be selectively removed and processed separately from heavier particles, enabling efficient dust handling while maintaining overall particle containment in the main system.
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 enhances operational manageability, ensures virtually all particles, including dust, are processed efficiently, and allows for adaptable ballistic properties of liberated particles, improving the handling of light and heavy fractions.
Implementation Method 1
By using the above airflow generator a low pressure zone is created in the particle contact area due to the so-called 'Magnus effect'. Because of the rotational direction of the rotor being aligned with the air inflow direction, the incoming airflow is accelerated in the particle contact area and, consequently, lower pressure results.
Data Source
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AI summary
A liberation and separation device (1) for separating a first fraction (2) of particles from a second fraction (3) of particles, comprising: a driven rotor (4), having a rotational axis and rotor blades (5) arranged for rotating around the rotational axis in a rotational direction (6), an infeed device (7) for introducing a particle stream into the liberation and separation device, a distribution device or area (9) for distributing the particle stream towards the rotor in a downwards particle inflow direction (10), to a particle contact area (11) where the particle stream contacts the rotor blades, an airflow generator (12) for generating an airflow towards the rotor in an air inflow direction (13) perpendicular to the particle inflow direction, wherein in the particle contact area the rotational direction is aligned with the air inflow direction for creating a low pressure zone in the particle contact area.