Disc Filter Cleaning Assembly with Tangential Jets
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Solution Overview
Problem
Existing backflushable disc filters face inefficiencies in cleaning and rotating individual discs during the backflush operation, leading to incomplete removal of particulate matter and reduced filter effectiveness over time.
Innovation Solution
A disc filter design featuring a stack of apertured discs with a disc cleaning assembly that includes fluid conduits for producing tangential and inner backflushing liquid jets, allowing discs to rotate relative to each other and enhancing cleaning by directing jets tangentially onto the outer and inner surfaces, along with a core element and piston assemblies that manage compression and water flow during filtering and backflushing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional backflushable disc filter is used, then the filter structure is simple, but the cleaning efficiency is insufficient leading to incomplete removal of particulate matter
Solution Approach 1:
The filter system is segmented into multiple functional components: a stack of apertured filter discs, a core element with separate first and second fluid conduits, and a disc cleaning assembly. This segmentation allows independent optimization of each component's function, enabling effective cleaning through targeted fluid jet delivery to specific disc surfaces without requiring complete system redesign
Solution Approach 2:
The patent introduces fluid conduits as intermediary elements that mediate between the water supply and the filter discs. The first fluid conduit delivers water to the outer surfaces of discs, while the second fluid conduit delivers water to the inner surfaces. These intermediary conduits enable precise control of cleaning fluid delivery, improving particulate matter removal efficiency
2Productivity
If discs are kept stationary during backflush, then the filter structure is stable, but particulate matter cannot be effectively removed from disc surfaces
Solution Approach 1:
The patent implements dynamic disc rotation during backflush operation by allowing individual discs to rotate relative to adjacent discs about the filter axis. The disc cleaning assembly rotates at least some discs relative to others, enabling thorough cleaning of both inner and outer surfaces. This dynamic rotation, combined with controlled fluid jet delivery, effectively removes particulate matter while maintaining overall system stability through the compressed stacked disc configuration
3Productivity
If only inner surface backflushing is performed, then the fluid conduit design is simple, but outer surface contaminants remain
Solution Approach 1:
The fluid delivery system is segmented into two separate conduits: the first fluid conduit specifically targets the outer surfaces of filter discs, while the second fluid conduit targets the inner surfaces. This segmentation ensures comprehensive contaminant removal from all disc surfaces without requiring a single complex conduit system, as each conduit is optimized for its specific cleaning function
Solution Approach 2:
The patent applies local quality by directing cleaning fluid to specific locations on the discs based on contaminant accumulation patterns. The first fluid conduit delivers water to outer surfaces where contaminants accumulate during normal filtration, while the second fluid conduit delivers water to inner surfaces during backflush. This localized fluid delivery optimizes cleaning effectiveness for each surface type
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 design improves the efficiency of particulate matter removal by allowing individual discs to rotate and be cleaned effectively, enhancing the filter's ability to flush contaminants and maintain performance over multiple cycles.
Implementation Method 1
at least one first fluid conduit for producing at least one outer liquid jet directed generally tangentially into engagement with the outer surface of the at least one stack for rotationally driving the at least some of the discs in the at least one stack about the axis relative to others of the discs in the at least one stack
Implementation Method 2
at least one second fluid conduit for producing at least one inner backflushing liquid jet directed into engagement with the inner surface of the at least one stack
Implementation Method 3
at least one stack of apertured filter discs arranged about an axis
Data Source
AI summary
A disc filter including a stack of apertured filter discs arranged about an axis, the stack having an outer surface and an inner surface and being mounted such that during backflush, individual discs are rotatable relative to adjacent discs about the axis and a disc cleaning assembly operative to rotate at least some of the discs about the axis relative to others of the discs, the disc cleaning assembly including at least one first fluid conduit for producing at least one outer liquid jet directed generally tangentially into engagement with the outer surface of the stack for rotationally driving the at least some of the discs about the axis relative to others of the discs and at least one second fluid conduit for producing at least one inner backflushing liquid jet directed into engagement with the inner surface of the stack.