Vibrating Deck Gravity Separator with Air Stratification
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Solution Overview
Problem
Conventional separators face challenges in increasing processing capacity without degrading separation quality, as higher material loads lead to decreased output concentration.
Innovation Solution
The separator design incorporates a vibrating deck with adjustable slope and tilt, angled riffles, and air flow to enhance material separation, allowing for controlled flow and stratification of materials based on density, with a feeder regulating the material input to maintain uniform processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the material load per unit time is increased to increase processing capacity, then productivity is improved, but separation quality deteriorates due to decreased output concentration
Solution Approach 1:
The deck surface is segmented into multiple zones with different functions: a feed zone, a stratification zone with air injection, and a separation zone with riffles. This segmentation allows different separation mechanisms to operate simultaneously at different locations, enabling high throughput while maintaining separation quality.
Solution Approach 2:
Air is introduced as an intermediary substance through pores in the deck to fluidize and stratify the material bed. This air mediation enables dense materials to sink and light materials to float, achieving effective separation even at high material loads that would otherwise overwhelm conventional separators.
2Manufacturing precision
If the deck vibration amplitude is increased to enhance separation efficiency, then separation quality is improved, but material flow control becomes difficult leading to loss of substance
Solution Approach 1:
Different regions of the deck provide different functions: the feed zone accepts material at high rates, the air injection zone fluidizes and stratifies the material, and the riffle zone performs final separation. This local differentiation allows optimal vibration characteristics in each zone without causing excessive material loss.
Solution Approach 2:
The system changes the physical state of the material bed by introducing air to create a fluidized state. This parameter change from solid bed to fluidized bed allows materials to separate based on density under vibration without requiring excessive vibration amplitude that would cause material loss.
3Productivity
If the deck is designed with large pores to allow air flow, then air permeability is improved, but structural strength decreases
Solution Approach 1:
The deck is constructed as a composite structure combining a rigid support framework with a porous surface layer. The support structure provides the necessary mechanical strength to handle high material loads, while the porous surface layer allows adequate air flow for fluidization and 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
This configuration enables efficient separation and concentration of materials by aligning vibration with material flow, using air to aid in stratification, and adjusting slope and riffle angles to optimize separation quality while maintaining or increasing processing capacity.
Implementation Method 1
The deck may be configured to vibrate. In some embodiments, the direction of the vibration of the deck or a conveyance direction may be aligned with (e.g., may be parallel to, or substantially parallel to) the feed direction of the material.
Implementation Method 2
air may be applied to material on the deck. The air may be used to provide an 'air weighing' of the material being separated on the deck. For example, application of the air may cause lighter material to move towards the top of a bed of material on the deck, allowing the heavier or denser material to sink to the bottom of the bed of material on the deck
Implementation Method 3
The deck may also provide a friction surface. As the deck is vibrated contact between the deck surface and the product being separated may produce motion in the direction of vibration.
Implementation Method 4
The deck may include a porous surface. The pores may be small enough that none of the incoming feed falls through. Pore size may be made as large as possible to allow air to pass upward through a bed of feed to be processed.
Data Source
AI summary
An apparatus, method, and system are provided for separating material. In some embodiments the separator may include a deck. The deck may accept the material to be separated at a feed end and may provide separated output material at a discharge end. The flow of the material along the deck from the feed end to the discharge end may define a feed direction. The deck may be subject to a vibration or conveyance aligned with the feed direction. The deck may include riffles or corrugations. The riffles may be oriented at an angle relative to a direction of the vibration or conveyance, or at an angle relative to the feed direction. The deck may be subjected to an end-to-end elevation or slope. The end-to-end slope may be positive/downhill, negative/uphill, or zero.