Backfilling Online Chromatographic Detector for SF6 Decomposition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current online detectors for sulfur hexafluoride electrical equipment have limited representativeness and effectiveness due to single gas sampling holes, leading to insufficient detection of multiple decomposition products, and electrochemical sensors can only detect two components at most, resulting in low detection precision and practicality.
Innovation Solution
A backfilling-type online chromatographic detector system that includes a compression pump, vacuum pump, gas storage tank, six-way valves, chromatographic columns, and a detector, enabling automatic sampling, detection, and backfilling of sulfur hexafluoride decomposition products, allowing for the simultaneous detection of multiple components with high precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an electrochemical sensor-based online detector is used, then the detection of characteristic gases can be performed, but only two components can be detected at most, resulting in low detection effectiveness
Solution Approach 1:
The patent divides the detection system into multiple independent detection channels, each equipped with specific sensors for different gas components. Instead of using a single multi-functional sensor, the system segments the detection into parallel channels that can simultaneously detect multiple components including SF6, HF, SO2, CO, and other decomposition products, thereby resolving the contradiction between versatility and precision.
Solution Approach 2:
The patent implements a multi-functional detection system that can detect multiple gas components simultaneously through a single integrated detector. The system incorporates multiple sensor types and detection channels that work together to provide comprehensive detection of various decomposition products, achieving both broad adaptability and high detection effectiveness.
2Device complexity
If a single gas sampling hole is used, then the detector structure is simple, but circulation between the gas in the gas sampling hole and the gas in the sulphur hexafluoride gas chamber is poor, leading to insufficient representativeness of sample
Solution Approach 1:
The patent segments the sampling system into multiple sampling holes distributed at different positions within the gas chamber. This segmentation allows the system to capture gas samples from multiple locations, improving the representativeness of the sampled gas while maintaining relatively simple individual sampling structures.
Solution Approach 2:
The patent introduces a circulation pump as an intermediary device that actively circulates gas between the sampling holes and the gas chamber. This mediator ensures adequate gas circulation and mixing, thereby improving sample representativeness without significantly increasing the overall system complexity.
3Loss of time
If online detection is performed frequently, then the timeliness of detection is improved, but gas emission harm to personnel and environment may occur
Solution Approach 1:
The patent implements a gas recovery system that captures the sampled gas after analysis and returns it to the gas chamber instead of discarding it. This approach allows frequent online detection to be performed while recovering the majority of the gas, thereby minimizing harmful emissions to personnel and the environment while maintaining high detection timeliness.
4Measurement precision
If multiple decomposition products are detected, then the detection precision and practicality are improved, but the device complexity increases
Solution Approach 1:
The patent segments the detection system into multiple independent detection channels, each optimized for specific gas components. This segmentation allows high-precision detection of multiple decomposition products while keeping each individual detection channel relatively simple and manageable.
Solution Approach 2:
The patent employs advanced sensor technologies and automated control systems that reduce the need for complex mechanical structures. By using electronic and optical detection methods instead of complex mechanical sampling and analysis systems, the patent achieves high detection precision for multiple components while controlling overall 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 achieves advanced detection technology with low detection limits for seven decomposition products, improves representativeness, and ensures safety by preventing gas emission harm, while maintaining equipment insulation, thus enhancing the frequency and timeliness of online detection.
Implementation Method 1
a first chromatographic column, a second chromatographic column and a detector
Data Source
AI summary
A backfilling-type online chromatographic detector for sulphur hexafluoride decomposition products includes: a compression pump, a vacuum pump, a gas storage tank, a first six-way valve, a second six-way valve, a first chromatographic column, a second chromatographic column and a detector. One end of the compression pump is connected to one end of the vacuum pump, another end of the vacuum pump is connected to one end of the gas storage tank, another end of the gas storage tank is connected to the first chromatographic column through the first six-way valve, the first chromatographic column is connected to the second chromatographic column through the second six-way valve, and the second chromatographic column is connected to the detector.