Oval Aeration Element with Corrugated Support and Check Valve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing aeration elements for liquid gasification, such as those used in clarification plants, face issues with longevity due to membrane fatigue and limited cross-sectional area efficiency, and lack effective prevention of sludge or particle backflow.
Innovation Solution
An elongated, flattened aeration element with an oval cross-section and a flexible tubular membrane, featuring a corrugated support element and a check valve mechanism to prevent backflow, along with a secure mounting system to minimize wear and maximize surface area efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a flexible membrane is placed on a rigid plate-like aeration support element, then the membrane can release gas bubbles through openings, but the membrane creases or wrinkles at specific points causing fatigue and wear and reduced longevity
Solution Approach 1:
The support element transitions from a flat plate to a corrugated cylindrical structure with rounded cross-section. This curvature allows the flexible membrane to conform smoothly to the support element surface, eliminating creases and wrinkles that cause fatigue. The rounded geometry distributes stress evenly across the membrane surface during expansion and contraction cycles.
Solution Approach 2:
The invention uses a flexible membrane that completely surrounds the corrugated support element, forming a sealed chamber. This flexible shell configuration allows uniform expansion and contraction without localized stress concentration, preventing the membrane from developing fatigue cracks at specific points.
2Ease of manufacture
If plate-shaped aeration elements are connected to distribution conduit via fittings with elastic deformation, then a positive connection is formed, but the connection is not suitable for elongated aeration elements that act like lever arms under movement or liquid flow
Solution Approach 1:
The connection system transitions from rigid elastic deformation to a dynamic clamp mechanism that can adapt to movement forces. The clamp applies continuous pressure to maintain sealing contact, and the corrugated support element's flexibility allows it to absorb movement forces without compromising the connection integrity.
3Productivity
If a tubular aeration element with rigid support tube and flexible membrane is used, then gas can be introduced and released via slits in the membrane, but the aerating efficiency is limited due to limited cross sectional area
Solution Approach 1:
The invention transitions from a circular cross-section to an oval cross-section with flattened sides. This dimensional change increases the surface area available for gas release while maintaining a compact form factor. The oval geometry provides greater perimeter area for slits without significantly increasing the overall volume or requiring more space in the liquid body.
4Reliability
If the membrane is breached by external impact of sharp object or debris, then sludge or particles can enter the interior of the aeration element, but no prevention mechanism exists
Solution Approach 1:
The invention converts the potential harm of membrane breach into a beneficial self-sealing mechanism. The check valve design allows liquid to pass through during normal operation but automatically closes to prevent sludge and particles from entering when the membrane is breached, turning a failure condition into a protective feature.
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 longevity and surface area efficiency while preventing sludge and particle ingress, ensuring reliable operation and efficient gas distribution in various configurations.
Implementation Method 1
an elastomeric and flexible tubular membrane (5) having air slits provided only on a top surface of the aeration element when the membrane is placed around the support element
Implementation Method 2
a check valve mechanism to prevent backflow
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An aeration element for gasification or aeration of liquids includes an essentially flattened, rigid support element (2) having a substantially oval cross-section and corrugated outer surfaces (3, 4), the corrugated outer surfaces including ridges (20) defining grooves (21) therebetween; a threaded opening (8) for receiving a cooperating fitting for connection to an air supply; and a flexible membrane (5) of elastomeric material disposed around the support element (2), The membrane (5) has a plurality of slits (7), and wherein compressed gas is introduced between the support element (2) and the membrane (5), the gas can escape via these slits (7) into the surrounding liquid. A retaining clamp (6) holds the membrane around at least one end of the support element (2). A check valve assembly (15) prevents backflow of liquid, particles, sludge or debris into the interior of the support element (2).