Landfill Gas Extraction Control Using Predictive Well Adjustment
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Solution Overview
Problem
Conventional landfill gas extraction techniques are imprecise and inefficient, often resulting in undesirable gas properties, reduced energy content, and environmental emissions, and can disrupt the landfill's decomposition processes.
Innovation Solution
A predictive model-based control system for landfill gas extraction that adjusts control parameters in real-time or at frequent intervals using in situ control mechanisms, including sensors and flow-control devices, to optimize gas extraction efficiency and composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional manual valve control is used in landfill gas extraction wells, then the system is simple to operate, but the extraction precision and gas composition control are poor
Solution Approach 1:
The patent implements dynamic control by replacing static manual valves with automated control systems that continuously adjust extraction parameters based on real-time gas composition measurements and predictive models, enabling precise control of gas flow rates and composition
Solution Approach 2:
The system incorporates feedback mechanisms where gas composition sensors continuously monitor extracted gas, and this data feeds into predictive models that automatically adjust control valve positions to maintain desired gas properties, creating a closed-loop control system
Solution Approach 3:
The patent uses predictive models to forecast future gas composition and extraction conditions, allowing the control system to proactively adjust parameters before deviations occur, rather than merely reacting to changes after they happen
2Loss of energy
If conventional gas extraction systems are used, then the device complexity is low, but the energy content of extracted gas is reduced
Solution Approach 1:
The system dynamically changes extraction parameters including vacuum pressure, flow rates, and valve positions based on predictive model outputs to optimize the composition and energy content of extracted gas, preventing dilution with low-energy gases
3Productivity
If conventional extraction methods are used, then the operation is simple, but the extraction efficiency is low
Solution Approach 1:
The control system performs self-adjustment using automated algorithms that process sensor data and predict future conditions, eliminating the need for continuous manual intervention while maintaining high extraction efficiency through optimized parameter selection
4Object-affected harmful factors
If conventional gas extraction is used, then the system is simple to implement, but environmental emissions increase
Solution Approach 1:
The patent replaces simple mechanical extraction with an intelligent control system that uses computational models and automated decision-making to optimize extraction parameters, thereby reducing harmful emissions through precise control rather than brute-force extraction
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 precision and efficiency of landfill gas extraction, ensuring desired gas properties, reducing environmental impact, and maintaining optimal decomposition processes.
Implementation Method 1
measuring a plurality of values indicating conditions associated with the landfill
Implementation Method 2
the vacuum in the extraction wells pulls landfill gas into the collection system
Data Source
AI summary
Devices and techniques related to landfill gas extraction are disclosed. A technique for controlling extraction of landfill gas from a landfill through a gas extraction system is described. The method may include measuring a plurality of values indicating conditions associated with the landfill; computing, based at least in part on the plurality of values and on a model of the landfill, a predicted future state of the landfill; determining, based at least in part on the predicted future state of the landfill, one or more control parameters for one or more respective control devices configured to control operation of the gas extraction system; applying the one or more control parameters to the one or more respective control, and with the one or more control devices, controlling extraction of the landfill gas from the landfill based, at least in part, on the one or more respective control parameters.