Inclined Plates for CSO with Inverted Flow
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Solution Overview
Problem
Existing water quality treatment devices for storm water are inefficient in sediment removal and require extensive excavation, leading to high installation costs, especially in populated regions with high water tables, and struggle with turbulence and head loss, limiting their purification efficiency.
Innovation Solution
A self-contained water purification unit with a chamber containing inclined ribbed cells and a netting system that reverses water flow direction, enhancing sediment separation through concurrent settling and reducing device depth, while maintaining low Reynolds numbers for laminar flow and minimizing turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional water quality treatment devices are used, then sediment removal is performed, but the devices require extensive excavation leading to high installation costs
Solution Approach 1:
The patent inverts the conventional flow direction through inclined plates by entering water at the lowermost side and discharging at the uppermost portion, rather than the traditional top-to-bottom flow. This inversion enables concurrent settling where sediment particles move in the same direction as water flow, significantly improving sediment removal efficiency while reducing device depth requirements and installation costs
2Manufacturing precision
If conventional inclined plate devices are used, then water treatment is performed, but turbulence and head loss limit purification efficiency
Solution Approach 1:
By reversing the flow direction to enter at the lowermost side and discharge at the uppermost portion, the patent creates concurrent settling conditions that reduce turbulence. Sediment particles and water flow in the same direction, minimizing energy loss and improving purification efficiency compared to conventional counter-current flow systems
Solution Approach 2:
The patent modifies the flow parameters by changing the direction of water flow through the inclined plates, entering at the lower end and exiting at the upper end. This parameter change transforms the flow regime to reduce turbulence and head loss, thereby improving purification efficiency while maintaining lower energy consumption
3Manufacturing precision
If more collection area is placed above a given footprint, then pollutant separation efficiency increases, but device depth increases
Solution Approach 1:
The inverted flow configuration through inclined plates allows for more effective use of horizontal collection area within a reduced depth profile. By entering water at the lower end and discharging at the upper end, the system maximizes pollutant separation efficiency without requiring increased device depth, solving the contradiction between collection area effectiveness and device dimensions
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 significantly improves sediment removal efficiency, reduces device depth by 25%, and lowers installation costs by 50%, while maintaining high purification standards, by utilizing ribbed cells and a netting system that promotes concurrent settling and stratified flow, effectively managing sediment and water separation.
Implementation Method 1
The flow direction through the inclined cells is reversed from entry at the lower end to discharge at the upper end... enhancing sediment separation through concurrent settling
Implementation Method 2
The means of solids removal is intended to be passive and entirely dependent on the gravity induced flow of the water through the apparatus
Implementation Method 3
a net to trap floatable debris matter from flowing water in a subterranean chamber
Implementation Method 4
hydraulic performance indicators that promote low Reynolds Numbers which indicate laminar flow in a flow conduit and uninterrupted settling
Data Source
AI summary
This device serves to improve water quality under gravity flow conditions. The water quality treatment device traps floating debris with replaceable netting, it contains oil spills and settles sediment in self-cleaning settling cells above a collection bunker inside a chamber. The device directs the water below the inclined cells, through the inclined cells, or over the inclined cells, depending on the inflow intensity. All inflowing water enters the net cavity and the net is supported by the inclined cell assembly. The pollutant collection surfaces are overlapping each other and aligned with the water flow direction. A hinged baffle with orifices controls the flow rate through the inclined cells. The netting is replaceable when filled with debris through an access opening in the ceiling of the chamber. The sediment bunker is cleaned through access openings in the ceiling from the chamber inflow side and the exit side.