Common Backwash Valve for Bend-Free Filtration Flow
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Solution Overview
Problem
Filtration systems face inefficiencies due to liquid waste and kinetic energy loss during backflush operations, leading to increased pumping power requirements and system wear.
Innovation Solution
A filtration system design featuring a common valve with a linearly movable plug and a bend-free flow-channel configuration, which reduces fluid waste and energy loss by optimizing fluid flow paths and using a plug with protrusions to control fluid flow during mode transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional valve with multiple bends and narrow passages is used for backflush operation, then the valve can control fluid flow between different modes, but kinetic energy loss increases and pumping power requirements increase
Solution Approach 1:
The patent employs smooth curved transitions and arc-shaped flow paths in the valve design, replacing sharp bends with gradual curves. The valve body incorporates rounded corners and smooth internal surfaces that guide fluid flow without creating turbulent eddies, thereby reducing kinetic energy dissipation while maintaining effective flow control between filtration and backflush modes.
Solution Approach 2:
The valve is designed with segmented flow channels that separate the filtration mode path from the backflush mode path. This segmentation allows each flow path to be optimized independently - the filtration path maintains forward flow efficiency while the backflush path provides reverse flow capability with minimal resistance, reducing overall energy loss.
2Adaptability or versatility
If a conventional valve with complex internal passages is used, then the valve can provide multiple flow paths for different operations, but liquid waste during transition increases
Solution Approach 1:
The patent extracts the waste reduction function by incorporating a specifically designed transition chamber that isolates the fluid transition process from the main flow paths. This separate transition zone allows fluid to switch between filtration and backflush modes without creating unnecessary waste streams, as the transition itself is contained and controlled rather than discharged.
Solution Approach 2:
The valve design includes pre-positioned flow diverters and directional control elements that are already in place before transition begins. These preliminary configurations guide the fluid smoothly from one mode to another without requiring abrupt changes that would cause wasting during the transition phase.
3Ease of operation
If a valve with narrow flow passages is used to control backflush flow, then the valve can provide precise flow control, but pressure drops increase and pumping power requirements increase
Solution Approach 1:
The valve incorporates locally optimized flow control elements such as adjustable restrictors positioned at specific critical points in the flow path. Rather than constricting the entire flow passage, only specific localized areas provide resistance control, maintaining adequate passage width elsewhere to minimize overall pressure drop while achieving precise flow regulation where needed.
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 1E
AI summary
A filtration system is disclosed, which comprises a filtration-element within a filtration chamber, and a valving device located exteriorly to the filtration chamber, for reversing the direction of fluid-flow through the filtration-element for backwashing. The valving device thus functions as a common valve for handling both filtration and backwash. The common valve is based on a linearly-movable plug located inside a valve housing which is communicable with the filtration chamber, with a source of fluid to be filtered, and with evacuation port for backwash fluid, through three respective openings in the valve housing, and is characterized by an uninterrupted bend-free flow-channel extending at least from exteriorly to an inlet opening of the valve housing, to the body of the filtration-element whenever the common valve is in a filtration mode of operation.