Gas Analyzer Sample Handling Monitoring for Contamination Faults
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gas analyzers face reduced useful life and inaccurate measurements due to inefficient removal of solid and fluid contaminants in the sample handling system, leading to abnormal conditions that often require frequent and inefficient daily routine maintenance.
Innovation Solution
A condition monitoring system that includes temperature regulators, pumps, purge devices, and valves to regulate gas sample flow, along with sensors to measure operational parameters such as heat tracer tube temperature, gas cooler temperature, and gas sample flow rate. This system uses a Distributed Control System (DCS) and Programmable Logic Controller (PLC) to compare measured and estimated operational parameters with reference values, generating alarms for faults, maintenance schedules, and predictive maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If daily routine maintenance is performed to prevent analyzer failure, then reliability is improved, but loss of time and productivity decrease due to frequent maintenance interruptions
Solution Approach 1:
The system performs preliminary monitoring of operational parameters (temperature, pressure, flow rate) and detects abnormal conditions before they lead to analyzer failure. By identifying trends and predicting potential failures in advance, the system enables maintenance to be scheduled at optimal times rather than requiring frequent routine maintenance or emergency repairs, thus improving reliability while reducing maintenance time loss
2Reliability
If interlocks are used to prevent sample from entering analyzer under abnormal conditions, then analyzer reliability is improved, but measurement precision decreases because abnormal conditions are only detected when they occur
Solution Approach 1:
The system continuously monitors operational parameters and provides feedback about the actual condition of the sample handling system. By comparing real-time measurements with expected ranges and analyzing trends, the system detects abnormal conditions earlier and more accurately than traditional interlocks, allowing for corrective action before measurements are compromised while maintaining analyzer reliability
3Measurement precision
If sample handling system components are monitored continuously, then measurement precision is improved by detecting abnormal conditions earlier, but device complexity increases
Solution Approach 1:
The monitoring system is designed to serve multiple functions: it monitors operational parameters for early detection of abnormal conditions, tracks trends over time, predicts potential failures, and provides diagnostic information. By consolidating these functions into a single integrated system rather than separate monitoring mechanisms, the system improves measurement precision through continuous monitoring while minimizing the increase in device complexity
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 effectively monitors and predicts faults in the sample handling system, recommending corrective actions to prevent malfunctions, thereby reducing maintenance frequency, ensuring accurate gas analysis, and extending the useful life of gas analyzers.
Implementation Method 1
The gas sample from the process pipeline first enters the primary sampling system. Primary sampling system filters the gas using a high-pressure filter. The filtered gas passes through a Gas cooler which separates any moisture or other condensable gases present in the gas sample. The separated moisture or condensates will be collected in a condensate vessel.
Implementation Method 2
the at least one sample handling device includes one or more temperature regulators for regulating the temperature of the gas sample
Data Source
Figure 1
Figure 1a
Figure 2
AI summary
The present invention discloses a method and a system for monitoring condition of a sample handling system connected to a gas analyzer. The sample handling system comprises a sample line for supplying a gas sample to the gas analyzer, and sample handling devices. The system for monitoring condition, receives measurements from temperature and pressure sensors connected to the sample line and obtains operating characteristics of the sample handling devices based on the measurements and model of the sample handling system; and determines the condition of the sample handling system based on comparison of the operating characteristics of the sample handling device against a plurality of reference values associated with the sample handling device.