Exhaust Stack Sampling Cage for Combustion Emission Monitoring
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Solution Overview
Problem
Hydrocarbon extraction systems face challenges in efficiently determining the chemical composition of flaring exhaust and adjusting gas/air ratios during combustion, leading to excessive unreacted natural gas emissions and degradation of combustion efficiency over time, posing risks to human operators and environmental regulations.
Innovation Solution
An exhaust testing system comprising a sampling system and gas analyzer, which includes a cage, sampling pipes, and valves, coupled to a combustion system to capture and analyze exhaust gas, and a laser heterodyne radiometer to measure unreacted natural gas, allowing for real-time adjustment of fuel-to-air ratios to maintain compliance with emission thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual testing of flaring exhaust is performed, then chemical composition can be determined, but human operator safety is compromised and testing is not performed under normal operating conditions
Solution Approach 1:
The patent introduces an automated sampling system with a cage, sampling pipes, and valves that acts as an intermediary between the exhaust stack and the gas analyzer. This intermediary system safely transports exhaust gas samples without requiring human operators to directly expose themselves to the hazardous flaring exhaust, thereby resolving the safety measurement contradiction while maintaining measurement capability.
Solution Approach 2:
The patent replaces manual mechanical sampling methods with an automated system that uses a laser heterodyne radiometer for gas analysis. This substitution eliminates the need for human operators to manually test exhaust composition, improving both safety and enabling continuous monitoring under normal operating conditions.
2Productivity
If combustion systems operate for extended periods, then productivity is maintained, but combustion efficiency degrades over time due to wear and tear
Solution Approach 1:
The patent implements a feedback mechanism where the gas analyzer continuously monitors exhaust gas composition and provides real-time data to the combustion system controller. This feedback loop enables the system to detect degradation in combustion efficiency and automatically adjust operating parameters to maintain optimal performance throughout extended operation periods.
Solution Approach 2:
The patent enables continuous monitoring and adjustment of combustion parameters through automated sampling and analysis systems that operate throughout extended periods. This continuous action allows the system to maintain combustion efficiency without interruption, resolving the contradiction between continuous operation and efficiency maintenance.
3Device complexity
If conventional sampling methods are used, then device complexity is low, but exhaust gas composition cannot be efficiently determined and gas/air ratios cannot be adjusted
Solution Approach 1:
The patent designs the sampling cage and piping system to serve multiple functions: it captures exhaust gas, conditions the sample, transports it to the analyzer, and enables controlled sampling at different locations. This multi-functionality justifies the moderate complexity increase while significantly improving exhaust analysis efficiency and enabling real-time combustion optimization.
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 efficiently determines exhaust gas composition, reduces unreacted natural gas emissions, and optimizes combustion efficiency by adjusting fuel/air ratios, thereby minimizing pollutant release and diagnosing system issues.
Implementation Method 1
obtaining, from a laser heterodyne radiometer, a measurement that indicates a proportion of unreacted natural gas in exhaust gas
Data Source
AI summary
Various embodiments of the present technology relate to emission monitoring. Some embodiments comprise an exhaust testing system to characterize exhaust gas composition. The exhaust testing system comprises a sampling system and a gas analyzer. The sampling system is coupled to an exhaust stack of a combustion system. The sampling system comprises a cage, sampling pipes, and valves. The cage is mounted to the opening of the exhaust stack. The sampling pipes are mounted to the cage. The sampling pipes capture exhaust gas generated by the combustion system and emitted through the opening of the exhaust stack. The valves control gas flow through the sampling pipes. The gas analyzer is coupled to the sampling pipes. The gas analyzer determines gas composition of the exhaust gas.