Wireless Rotameter for Flare Purge Gas Flow Control
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Solution Overview
Problem
Current systems for monitoring and controlling purge gas flow in flare networks are inefficient, leading to excessive flaring, greenhouse gas emissions, and suboptimal energy consumption, as they lack real-time monitoring and precise control, relying on analog meters that are difficult to read and prone to errors.
Innovation Solution
Implementing a wireless rotameter system that remotely measures and controls the purge gas flow, adjusting it based on temperature and pressure to maintain a target range, allowing for continuous monitoring and optimization of the flare network pressure, thereby preventing air ingress and optimizing energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If analog flow meters are used for monitoring purge gas flow, then the system structure is simple, but the measurement precision is poor and reading accuracy is difficult
Solution Approach 1:
The patent replaces traditional mechanical analog flow meters with wireless rotameters that provide digital readings. This substitution eliminates the need for visual reading of analog scales, improving measurement precision while the wireless communication capability allows remote monitoring without adding significant system complexity.
Solution Approach 2:
The patent introduces a wireless communication system as an intermediary between the flow measurement device and the control system. This intermediary enables accurate flow data transmission to remote locations, improving measurement precision while keeping the overall system architecture relatively simple through standardized wireless protocols.
2Productivity
If purge gas flow is not monitored, then the system operation is simple, but excessive flaring occurs and energy consumption increases
Solution Approach 1:
The patent implements a feedback control system where wireless rotameters continuously monitor purge gas flow rates and transmit data to a control system. The control system compares actual flow against target ranges and automatically adjusts the control valve to maintain optimal flow, preventing excessive flaring and improving energy efficiency while managing system complexity through automated control.
Solution Approach 2:
The system enables self-adjustment of purge gas flow rates through automated control based on wireless flow measurements. The control system autonomously optimizes flow rates without requiring manual intervention, improving energy efficiency while the automation reduces operational complexity.
3Speed
If control valve is operated manually, then the system is easier to operate, but the response time is slow and flow optimization is poor
Solution Approach 1:
The patent implements automated feedback control where the control system receives real-time flow data from wireless rotameters, compares it against target ranges, and automatically adjusts the control valve position. This automated feedback loop significantly improves response speed compared to manual operation while managing operational complexity through standardized control interfaces.
Solution Approach 2:
The patent replaces manual mechanical control valve operation with automated control systems that receive wireless flow data and automatically adjust valve positions. This substitution improves response speed by eliminating manual reading and adjustment delays, while the automation manages operational complexity through programmable control logic.
4Reliability
If purge gas flow rate is too high, then air ingress is prevented, but excessive flaring and greenhouse gas emissions occur
Solution Approach 1:
The patent uses wireless rotameters to provide real-time feedback on purge gas flow rates, enabling the control system to maintain flow within an optimized range. This feedback mechanism ensures sufficient flow to prevent air ingress while minimizing excess purging that would lead to greenhouse gas emissions, thus resolving the contradiction between reliability and harmful emissions.
Solution Approach 2:
The patent dynamically adjusts purge gas flow rates based on real-time measurements and process conditions. By changing the flow parameter within an optimized range rather than maintaining a fixed high flow rate, the system prevents air ingress while minimizing greenhouse gas emissions from excessive purging.
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 wireless rotameter system enables precise and continuous monitoring and control of purge gas flow, reducing excessive flaring, minimizing greenhouse gas emissions, and optimizing energy consumption by maintaining the required positive pressure in the flare network, thus preventing catastrophic air-hydrocarbon mixtures and improving operational efficiency.
Implementation Method 1
wireless rotameter system that remotely measures and controls the purge gas flow
Implementation Method 2
wireless rotameter system that remotely measures and controls the purge gas flow
Implementation Method 3
A control valve is operated to amend a flow of purge gas
Implementation Method 4
maintaining the required positive pressure in the flare network, thus preventing catastrophic air-hydrocarbon mixtures
Data Source
AI summary
A method for optimizing purge gas of a flare system includes measuring a flow of flare fluids within a flare system to obtain a measured flow value. The flow of the flare fluids is compared to a target flow to obtain a difference between the flow of the flare fluids and the target flow. A control valve is operated to amend a flow of purge gas and the steps of measuring a flow of flare fluids and comparing the flow of the flare fluids to the target flow are repeated until the flow of the purge gas is within a target range. A value of the flow of purge gas is measured and transmitted wirelessly to a control system.