Landfill Gas Extraction Control for Stable Methane Concentration
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Solution Overview
Problem
Conventional landfill gas extraction techniques are imprecise and inefficient, often resulting in gas with undesired properties, environmental impact, and potential safety hazards.
Innovation Solution
A control system with sensors and flow control mechanisms adjusts the extraction of landfill gas based on predictive modeling, maintaining gas concentrations within target ranges and maximizing energy content by iteratively controlling flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional landfill gas extraction techniques are used, then gas extraction can be performed, but the extraction is imprecise and inefficient resulting in gas with undesired properties
Solution Approach 1:
The system employs sensors to continuously monitor gas composition (methane, oxygen, carbon dioxide levels) and feeds this information back to the flow control mechanism. The controller adjusts extraction parameters based on real-time feedback to maintain gas concentrations within target ranges, thereby improving both precision of gas composition control and overall extraction efficiency.
Solution Approach 2:
The invention dynamically changes extraction parameters including flow rate, vacuum pressure, and extraction timing based on monitored gas composition. By adjusting these parameters in response to real-time conditions, the system achieves precise control over extracted gas properties while maximizing extraction efficiency.
2Object-affected harmful factors
If conventional extraction methods are used, then gas can be extracted, but environmental emissions are not adequately reduced
Solution Approach 1:
The system monitors gas composition in real-time and uses this feedback to control extraction and disposal processes. By maintaining methane and other contaminant concentrations within target ranges through active control, the system reliably reduces harmful emissions to the environment.
Solution Approach 2:
The system automatically adjusts extraction parameters based on sensor readings without requiring manual intervention. The self-regulating control mechanism ensures consistent emission reduction performance by autonomously maintaining gas concentrations within acceptable ranges.
3Object-affected harmful factors
If conventional extraction techniques are used, then gas extraction occurs, but safety hazards are not minimized
Solution Approach 1:
The system continuously monitors gas composition including oxygen and methane levels, providing real-time feedback on potential safety hazards. The controller uses this information to adjust extraction parameters to maintain safe gas concentrations, thereby reliably minimizing safety risks.
Solution Approach 2:
The system proactively monitors gas composition and adjusts extraction parameters before unsafe conditions can develop. By maintaining gas concentrations within target ranges through predictive control, the system prevents safety hazards rather than merely responding to them.
Data Source
AI summary
A control system for controlling extraction of landfill gas, comprising: at least one sensor configured to measure one or more characteristics of landfill gas; at least one flow control mechanism disposed in well piping and configured to control flow of the landfill gas through the well piping; and at least one processor configured to: obtain a measured concentration of a first gas in landfill gas; determine whether the measured concentration of the first gas is either less than a first threshold concentration or greater than a second threshold concentration; when it is determined that the measured concentration is less than the first threshold concentration, control the at least one flow control mechanism to reduce flow rate of landfill gas; and when it is determined that the concentration is greater than the second threshold concentration, control the at least one flow control mechanism to increase the flow rate of landfill gas.