Vibrating Plate Air Classifier for Residue Separation
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Solution Overview
Problem
Existing methods for separating residues from thermal waste treatment into fine and coarse fractions face issues such as screen clogging and wear, as well as inefficient burnout and increased landfill costs due to dust escape and heavy slag weights.
Innovation Solution
The method employs ambient air or oxygen-rich gas from the waste treatment plant for air classification, using vibrating plates and a cascading system with controlled gas flow to separate residues, preventing dust escape and enhancing burnout, while the device features a housing with inclined vibrating plates and adjustable gas flow for effective separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If screens are used to separate the fine fraction of less than 2 mm, then separation is achieved, but the screens become clogged and are subject to heavy wear
Solution Approach 1:
The patent replaces the mechanical screen separation system with a pneumatic air classification system. Residues are conveyed through a fluidized bed where air flow separates fine particles from coarse material based on aerodynamic properties, eliminating physical screens that clog and wear.
Solution Approach 2:
The invention uses controlled air flow through a fluidized bed to achieve separation. The pneumatic system creates upward air currents that carry fine particles while heavier coarse material settles, providing reliable separation without mechanical contact.
2Object-affected harmful factors
If wet slag removers are used to prevent dust escape, then dust is contained, but the residual materials or slag that are discharged have a higher weight, which increases the costs for the landfill
Solution Approach 1:
The patent replaces wet mechanical slag removal with a controlled pneumatic extraction system. Air flow through the fluidized bed naturally separates and removes fine dust particles, while the fluidization process maintains proper combustion conditions without adding water weight to the slag.
Solution Approach 2:
The invention changes the physical state and properties of the slag by maintaining it in a fluidized, high-temperature state during processing. This prevents premature cooling and condensation that would increase weight, while controlled pneumatic extraction removes dust without wetting the material.
3Manufacturing precision
If ambient air is used for air classification, then separation is achieved, but oxygen is consumed and may cause false air entry into the combustion chamber
Solution Approach 1:
The patent makes the air classification system multi-functional by using the same air flow for both separation and combustion support. The pneumatic system serves dual purposes: classifying residues by size and providing oxygen to the fluidized bed combustor, eliminating waste and potential false air issues.
Solution Approach 2:
The invention merges the air classification function with the combustion air supply system. The pneumatic conveyor and fluidized bed share the same air source and flow path, combining what were previously separate functions into a unified system that improves efficiency.
4Manufacturing precision
If residues are conveyed downwards in a cascading manner over shaking stages, then separation is achieved, but the system becomes complex and requires multiple components
Solution Approach 1:
The patent extracts and eliminates the complex multi-stage shaking cascade system, retaining only the essential fluidized bed separation function. By removing unnecessary mechanical stages and keeping only the pneumatic fluidization process, the system achieves separation with simpler equipment.
Solution Approach 2:
The invention replaces the complex mechanical cascade shaking system with a simpler pneumatic fluidized bed system. The separation function is maintained through air flow and particle dynamics rather than mechanical vibration and multiple conveyors.
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 achieves better burnout and separation efficiency, reduces landfill costs, and prevents false air entry into the combustion chamber, improving slag quality and reducing contamination by effectively separating fractions and recycling pollutants.
Implementation Method 1
the fine fraction is separated off by a gas flow in the free fall sections
Implementation Method 2
the residues are conveyed downwards in a cascading manner in tracks and intermediate free fall sections
Implementation Method 3
the residues are conveyed by vibrating movement on plates
Implementation Method 4
conveyed by the shaking movement
Implementation Method 5
a post-reaction occurs in the residues, particularly in the area of the free-fall sections, so that the slag quality can be improved due to the higher degree of burnout
Implementation Method 6
better burnout of the residues
Implementation Method 7
the gas flow after the air classification is first fed to a cyclone separator
Data Source
Figure 1~2
AI summary
The device for separating residual materials from thermal waste treatment into a fine fraction and a coarse fraction comprises a housing (1) supported on vibration elements (2) with several plates (3.1 - 3.5) arranged one below the other and at an angle, which are connected to the housing (1) at their side edges. The housing (1) is equipped with means (5) for generating a vibration component directed towards the downwardly angled plates (3.1 - 3.5). Furthermore, the device has a suction line (6) and an inlet opening for a gas that can be directed between the plates for air classification. Residual materials or slag from a waste treatment plant or a combustion plant are fed into this device to separate them into at least one fine fraction and one coarse fraction.