Foundry Sand Reclamation Fluidized Bed Anti-Clogging Design
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Solution Overview
Problem
Conventional apparatuses for reclaiming foundry sand suffer from clogging issues in fluidized beds due to sand particle compression, requiring regular cleaning and disrupting the sand reclamation process.
Innovation Solution
The apparatus features a fluidized bed with inverted V-shaped covering members and V-shaped flooring members, arranged alternately to form inclined slits for air supply, which prevents clogging by allowing sand and fine powder to drop without entering the slits, and includes round bars to modify airflow, reducing turbulence and improving separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slits are formed in a plate for upwardly blowing air to fluidize foundry sand, then the sand can be fluidized and dust can be separated, but the sand particles compress and form an arch causing clogging in the slits
Solution Approach 1:
The fluidized bed is divided into multiple layers with alternating covering members and flooring members, creating multiple sets of slits distributed throughout the bed. This segmentation prevents localized clogging by distributing sand particles across multiple pathways rather than concentrating them in a single slit structure.
Solution Approach 2:
Instead of having slits in a horizontal plate as in conventional designs, the invention inverts the structure by placing slits between alternating covering and flooring members at different heights. The slits are oriented vertically between layers, allowing air to flow upward through multiple levels while preventing particle accumulation in any single location.
2Productivity
If conventional slit structures are used in the fluidized bed, then air can be supplied to fluidize sand, but regular cleaning is required to remove clogged particles
Solution Approach 1:
The alternating covering and flooring member structure with distributed slits allows continuous air supply and continuous fluidization without interruption. The multi-level design ensures that sand particles are constantly moved and separated, eliminating the need for periodic cleaning stops and maintaining uninterrupted reclamation operation.
3Speed
If sand particles enter the slits when air is blown, then fluidization occurs, but the particles compress and form an arch blocking the slits
Solution Approach 1:
The invention transitions from a two-dimensional plate with horizontal slits to a three-dimensional structure with slits distributed across multiple vertical levels. The slits are positioned between covering and flooring members at different heights, creating vertical pathways that allow air to flow through the entire bed depth without particles blocking any single slit plane.
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 prevents slit clogging, allows for continuous operation without waiting for powder collection, saves energy, and enhances the separation of fine powder from reclaimed sand, enabling efficient and uninterrupted sand reclamation.
Implementation Method 1
forming a fluidized layer by blowing air into the foundry sand that includes dust
Implementation Method 2
Gaps between the end portions of the inverted V-shaped covering members and the end portions of the V-shaped flooring members are formed as inclined slits for supplying air
Implementation Method 3
the dust hood collects the fine powder in the tank for fluidization
Data Source
AI summary
To provide an apparatus for reclaiming foundry sand that has a fluidized bed that prevents slits from being clogged. The apparatus comprises a tank (3) for reclaiming the foundry sand, a tank (4) for fluidization, an upper portion of which in an upstream side is connected to a bottom of the tank for reclaiming the foundry sand, the tank for fluidization transporting the reclaimed foundry sand and fine powder that drop from the tank for reclaiming the foundry sand, a dust hood (5), and a lower portion of which communicates with an upper portion of the tank for fluidization in a downstream side, the dust hood collecting the fine powder in the tank for fluidization, wherein a fluidized bed (6) in the tank for fluidization has a plurality of inverted V-shaped covering members (13) and a plurality of V-shaped flooring members (14), wherein the inverted V-shaped covering members and the V-shaped flooring members are horizontally and alternately provided so that the inverted V-shaped covering members are at any point above a vertically corresponding point of the V-shaped flooring members, and wherein gaps between end portions of the inverted V-shaped covering members and end portions of the V-shaped flooring members are formed as inclined slits (15) for supplying air.