Multi-Component Weir Hydrodynamic Separator for Sediment and Oil Capture
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Solution Overview
Problem
Existing hydrodynamic separators are inefficient in capturing finer sediments and oils due to limited flow path maximization and velocity reduction, and have restricted maintenance access, leading to reduced sediment storage capacity and increased maintenance frequency.
Innovation Solution
A hydrodynamic separator design incorporating a flow splitter to split water flow into dual directions, an oil-floatables skimmer to trap pollutants, and an outlet weir to minimize exit velocity, combined with improved access to the sump chamber for efficient sediment removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flow path is maximized and velocity is reduced to enhance sediment capture, then the settling chamber size increases, but the device complexity and installation space requirements worsen
Solution Approach 1:
The flow is segmented into multiple paths using flow splitters and weirs, creating multiple smaller flow channels instead of one large channel. This increases the total flow path length and improves sediment capture efficiency without requiring a proportionally larger settling chamber volume.
Solution Approach 2:
The patent utilizes vertical flow paths and multi-level weirs to extend the flow path in the vertical dimension rather than only horizontally. This allows maximization of flow path length and sediment settling opportunity within a compact horizontal footprint.
2Duration of action of moving object
If the flow path is extended to improve oil and sediment separation, then the residence time increases, but the device complexity and maintenance access difficulty worsen
Solution Approach 1:
The settling chamber is segmented into multiple zones with flow splitters and weirs that create distinct flow paths. This segmentation allows for extended residence time in multiple passes while maintaining clear zone definitions that facilitate maintenance access and sediment removal.
Solution Approach 2:
Flow splitters and weirs act as intermediary structures that direct flow through extended paths while maintaining manageable flow conditions. These intermediaries enable prolonged residence time without creating excessive complexity in the overall device structure.
3Manufacturing precision
If velocity reduction is maximized to capture finer sediments, then the flow path length increases, but the device complexity and manufacturing cost worsen
Solution Approach 1:
Flow splitters divide the main flow into multiple smaller streams, naturally reducing velocity through increased path length and turbulence. This segmentation achieves fine sediment capture without requiring complex velocity control mechanisms.
Solution Approach 2:
The patent utilizes hydraulic principles through flow splitters and weirs to naturally reduce velocity and enhance sediment capture. The flow control structures leverage hydraulic turbulence and flow separation to achieve velocity reduction without complex mechanical systems.
4Volume of stationary object
If the settling chamber is made compact to reduce installation space, then the flow path length is reduced, but sediment capture efficiency worsens
Solution Approach 1:
The patent extends flow paths in the vertical dimension using multi-level weirs and flow splitters that create upward and lateral flow components. This allows sufficient flow path length for sediment capture within a compact horizontal footprint, effectively utilizing three-dimensional space.
Solution Approach 2:
By segmenting the flow into multiple paths using flow splitters and weirs, the patent maximizes the total flow path length within a compact chamber volume. The segmented flow creates multiple settling opportunities without requiring a proportionally larger chamber size.
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
Enhances sediment and oil capture efficiency up to 80% and 99% respectively, with increased sediment storage capacity and reduced maintenance intervals.
Implementation Method 1
a flow splitter to split water flow into dual directions
Implementation Method 2
an oil-floatables skimmer to trap pollutants
Implementation Method 3
an outlet weir to minimize exit velocity
Implementation Method 4
hydrodynamic separator for stormwater treatment designed to maximize flow movement for more efficient sediment removal
Data Source
AI summary
A method, system, and apparatus directed to an innovative approach for the treatment of stormwater utilizing hydrodynamic separator assembly designed to maximize flow movement for more efficient sediment removal and maximize clearance space within assembly to facilitate cleaning and increase storage capacity of trash, debris, and sediment.