Flare Emissions Analysis Using Real-Time Molar Balance
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Solution Overview
Problem
Conventional flare systems lack real-time monitoring and accurate measurement of greenhouse gas emissions, requiring frequent calibration and maintenance, and do not account for heat/material balances of discharging systems, leading to inefficiencies and environmental impact.
Innovation Solution
A computer-implemented method for real-time analysis of flare emissions using flaring volumes, heat/material balances, and relief source compositions, with molar balance calculations to determine emissions of SO2, NO2, CO2, and CH4, providing automated monitoring and reporting without capital or operational expenditures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional analyzer systems are used for flare emissions monitoring, then emissions can be measured, but the systems have limitations in reading range and require frequent calibration and maintenance
Solution Approach 1:
The patent replaces physical analyzer hardware with a computational system that calculates emissions using software-based molar balance equations. This substitution eliminates the mechanical/optical components of traditional analyzers that require calibration and maintenance, replacing them with virtual calculations performed by processors using input data from sensors and process information.
Solution Approach 2:
The patent creates a virtual model of the flare system through molar balance calculations that replicate the function of physical analyzers. Instead of directly measuring emissions with hardware, the system computes emissions by modeling the chemical processes and material balances, providing a virtual copy of the measurement function without the physical constraints.
2Measurement precision
If discrete period readings are used in conventional systems, then measurements can be taken, but the systems are not online and cannot provide real-time monitoring
Solution Approach 1:
The patent implements continuous real-time emissions monitoring by continuously solving molar balance equations as new data becomes available. The system processes input data from flow meters, composition analyzers, and process control systems in real-time, providing continuous emissions estimates rather than discrete periodic measurements, enabling ongoing monitoring and immediate operational response.
3Productivity
If conventional systems without heat/material balances are used, then emissions can be estimated, but the accuracy of emissions calculations for specific gases is reduced
Solution Approach 1:
The patent incorporates feedback from multiple process parameters including flow rates, compositions, heat balances, and material balances into the emissions calculation. The system continuously adjusts emissions estimates based on actual measured data from the flare system and connected processes, improving accuracy by accounting for the actual thermal and material states of the system rather than using fixed assumptions.
Solution Approach 2:
The patent changes the calculation parameters from simple empirical estimates to detailed thermodynamic and material balance parameters. By incorporating heat balances, material balances, and specific gas compositions, the system transforms emissions calculations from rough estimates to precise determinations of CO2, SO2, NO2, and CH4 emissions based on actual process conditions.
4Measurement precision
If multiple analyzers are installed for each flare header, then comprehensive monitoring can be achieved, but capital expenditures and system complexity increase
Solution Approach 1:
The patent creates a universal computational platform that can monitor multiple flare headers simultaneously using a single integrated system. The molar balance model can handle various flare configurations, gas compositions, and operating conditions through parameter adjustments rather than requiring separate hardware analyzers for each header, providing multi-functional capability with reduced complexity.
Solution Approach 2:
The patent merges the monitoring functions for multiple flare headers into a single integrated computational system. Instead of installing separate analyzers at each flare location, the system combines data from multiple sources and performs unified emissions calculations, consolidating what would require multiple discrete devices into one centralized platform.
Data Source
AI summary
Systems and methods include a computer-implemented method for monitoring emissions in real time. Flaring emissions are determined in real time for a flare stack based on: 1) a flaring volume in conjunction with heat and material balances of systems that discharge to a flare system, and 2) a composition of each relief source that discharges to the flare system. A molar balance around the flare stack is performed in real time using the flaring emissions to determine the emissions.