Pre-assembled Flow Control Structure for Stormwater Filtration
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Solution Overview
Problem
Stormwater in urban areas often carries high levels of pollutants, which can block filters and prevent effective treatment, leading to environmental pollution and the need for bypassing filters during construction phases, thereby undermining the efficiency of existing stormwater treatment systems.
Innovation Solution
A pre-assembled flow control structure integrated into the concrete floor of a stormwater treatment vault, allowing for an initial bypass configuration to divert stormwater around filters during high-pollution periods and a filtering configuration to treat stormwater using embedded filter assemblies and media filtration, reducing the need for external infrastructure and enhancing treatment efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stormwater filters are installed to treat polluted stormwater, then treatment effectiveness is improved, but filter blockage occurs during high-pollutant periods (construction phases)
Solution Approach 1:
The system dynamically switches between bypass mode and filter mode based on pollutant levels. During construction phases with high pollutants, the bypass conduit allows unfiltered flow. When pollutants decrease, the system transitions to filter mode for treatment. This dynamic adaptation prevents filter blockage while maintaining treatment effectiveness when conditions permit.
Solution Approach 2:
The flow control structure segments the stormwater flow path into multiple conduits: a filter conduit for treated flow and a bypass conduit for unfiltered flow. This segmentation allows the system to direct stormwater through appropriate paths based on conditions, preventing complete blockage while maintaining treatment capability when possible.
2Object-affected harmful factors
If stormwater is diverted through bypass conduits during construction phases, then filter blockage is prevented, but treatment effectiveness is reduced
Solution Approach 1:
The system operates in periodic cycles, alternating between bypass operation during high-pollutant construction phases and filter operation during low-pollutant periods. This periodic switching prevents chronic blockage while maximizing treatment effectiveness during suitable periods, creating a rhythm of bypass-treatment-bypass that addresses both concerns.
Solution Approach 2:
The flow control structure dynamically adjusts the proportion of stormwater directed through bypass versus filter conduits based on real-time or periodic assessment of pollutant levels. During construction, more flow bypasses; during normal conditions, more flow is treated. This dynamic allocation optimizes both blockage prevention and treatment effectiveness.
3Device complexity
If pre-assembled flow control structure is integrated into vault floor, then device complexity is reduced, but installation flexibility is limited
Solution Approach 1:
The flow control structure is pre-assembled as an integrated unit before installation in the vault. This preliminary assembly reduces on-site construction complexity and ensures proper integration of filters, conduits, and control mechanisms. The pre-assembled unit can be manufactured with precise connections and then installed as a complete system, balancing integration benefits with installation practicality.
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 system effectively manages high pollutant levels during construction phases by bypassing filters and ensures reliable treatment by integrating the flow control structure into the vault floor, reducing environmental pollution and operational costs while maintaining treatment efficiency.
Implementation Method 1
The filter apparatus of the '639 patent utilizes a sealed upper housing that includes a check valve for air evacuation within the housing. An induced siphon effect pulls stormwater through the filter until air is pulled through an air inlet along the lower perimeter of the housing, disrupting the siphon.
Data Source
AI summary
A stormwater filtration system (10) includes a stormwater containment structure including a concrete floor (20) and a pre-assembled flow structure (30) embedded in the concrete floor. The pre-assembled flow structure includes an inlet compartment housing, an outlet compartment housing and at least one filter conduit (46) positioned between the inlet compartment housing and the outlet compartment housing and in flow communication with the interior of the outlet compartment housing. At least one bypass conduit extends from the inlet compartment housing to the outlet compartment housing for delivering water from the interior of the inlet compartment housing to the interior of the outlet compartment housing. A plurality of filter units are connected to the filter conduit so that stormwater filtered by the filter units (22) passes into the filter conduit (46) and then to the interior of the outlet compartment housing.