Equalization Tank Flow Control With Wastewater Power Recovery
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Solution Overview
Problem
Conventional equalization tanks in wastewater systems lack adequate controls over wastewater flow and fail to harness the energy potential of wastewater for electricity generation.
Innovation Solution
Incorporating an adjustable valving member, such as an actuatable weir, and an electricity generation assembly, including a water wheel or Poncelet wheel, to control and convert the flow of wastewater for efficient power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an equalization tank is used to buffer flow rate variations, then flow rate stability is improved, but the system lacks adequate controls over wastewater flow
Solution Approach 1:
The patent applies the Dynamics principle by implementing an adjustable weir structure that can be moved vertically to different positions. This dynamic adjustment capability allows operators to control the flow rate from the equalization tank by changing the weir height, thereby resolving the contradiction between maintaining flow stability and enabling adequate flow control. The movable weir provides real-time adaptability to different operational requirements.
2Loss of energy
If conventional equalization tanks are used, then flow buffering is achieved, but energy potential of wastewater is not harnessed
Solution Approach 1:
The patent applies the 'Blessing in disguise' principle by converting the kinetic energy of wastewater flow, which would otherwise be wasted, into useful electrical energy. A water wheel is positioned in the flow path to capture the energy of moving wastewater, and this mechanical energy is then converted to electricity through a generator. This resolves the contradiction by transforming energy loss into energy production, simultaneously addressing both energy conservation and electricity generation needs.
3Productivity
If a water wheel is inserted into the flow channel, then electricity generation is enabled, but device complexity increases
Solution Approach 1:
The patent applies the Universality principle by designing a multi-functional assembly where the water wheel serves dual purposes: it acts as both a flow measurement device and an electricity generation mechanism. The same structure that captures wastewater energy also drives the generator, eliminating the need for separate measurement and power generation systems. This integrated approach reduces overall device complexity while maintaining electricity generation capability.
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 the performance and controllability of equalization tanks, allowing for efficient management of wastewater flow and generation of electrical power, thereby optimizing system operations and reducing energy consumption.
Implementation Method 1
a water wheel that is partially inserted into the flow channel such that a portion of the water wheel is extended outside of the flow channel
Implementation Method 2
an electrical generator connected to the water wheel
Implementation Method 3
a Poncelet wheel that is inserted into the flow channel
Data Source
AI summary
An embodiment of a system includes a pipeline of a wastewater system, an equalization tank that is configured to receive wastewater from the pipeline, and a return line extending from the equalization tank to the pipeline. In addition, the system includes an electricity generation assembly in fluid communication with the return line that is configured to generate electrical power using a flow of wastewater through the return line. The electricity generation assembly includes a flow channel, a water wheel that is partially inserted into the flow channel such that a portion of the water wheel is extended outside of the flow channel, and an electrical generator connected to the water wheel.