CN114152695B - Analysis method and analysis system for component content of mixed gas in gas insulation combined electrical system - Google Patents
Analysis method and analysis system for component content of mixed gas in gas insulation combined electrical system Download PDFInfo
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- CN114152695B CN114152695B CN202111454529.7A CN202111454529A CN114152695B CN 114152695 B CN114152695 B CN 114152695B CN 202111454529 A CN202111454529 A CN 202111454529A CN 114152695 B CN114152695 B CN 114152695B
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses an analysis method and an analysis system for the content of mixed gas components in gas insulation combined electricity, belongs to the technical field of gas chromatography analysis, and aims to solve the problems that the existing gas insulation combined electricity is high in impurity components and difficult to detect. The analysis system comprises a sample gas storage device, a carrier gas storage device, 6 automatic switching valves, a first quantitative ring and a second quantitative ring, wherein the first chromatographic column, the second chromatographic column, a third carrier chromatographic column, a third quantitative ring, a fourth chromatographic column, a fifth chromatographic column, a sixth chromatographic column, a first detector device and a second detector device, the second automatic switching valves and the fourth automatic switching valves are provided with 10 interfaces, and the first automatic switching valve, the third automatic switching valve, the fifth automatic switching valve and the sixth automatic switching valve are provided with 4 interfaces. The invention utilizes the multi-path carrier gas and the multi-chromatographic columns to completely separate 18 gas phase components, thereby ensuring the separation degree of 18 gas phase components and simultaneously ensuring the accuracy.
Description
Technical Field
The invention belongs to the technical field of gas chromatography analysis, and particularly relates to an analysis method and an analysis system for the content of a mixed gas component in gas insulated combined electrical.
Background
Sulfur hexafluoride gas is currently charged in gas insulated switchgear, but due to the large environment now in the dual carbon target of carbon-peak carbon neutralization, a certain amount of carbon tetrafluoride will typically be charged. Meanwhile, the contents of various components in the gas-insulated switchgear are required to be detected periodically, and whether the gas-insulated switchgear operates normally is judged through content detection. Because the impurity components in the gas insulated switchgear contain 18 inorganic matters or organic matters, and the contents of the impurity components are in nmol/mol level, an analysis method and an analysis system thereof are required to be designed to solve the current problems, and therefore, the analysis method and the analysis system of the content of the mixed gas components in the gas insulated switchgear are designed.
Disclosure of Invention
The invention aims to solve the problems that the existing gas-insulated combined electrical system is high in impurity components and difficult to detect, and provides an analysis method and an analysis system for the content of mixed gas components in the gas-insulated combined electrical system.
The invention relates to an analysis system for the component content of mixed gas in gas insulation combined electricity, which comprises a sample gas storage device, a carrier gas storage device, a first automatic switching valve, a second automatic switching valve, a first quantitative ring and a second quantitative ring, wherein a first chromatographic column, a third automatic switching valve, a second chromatographic column, a third carrier chromatographic column, a third quantitative ring, a fourth automatic switching valve, a fourth chromatographic column, a fifth automatic switching valve, a sixth chromatographic column, a first detector device and a second detector device, the second automatic switching valve and the fourth automatic switching valve are respectively provided with a No. 1 interface to a No. 10 interface in a clockwise direction, and the first automatic switching valve, the third automatic switching valve, the fifth automatic switching valve and the sixth automatic switching valve are respectively provided with a No. 1 interface to a No. 4 interface in a clockwise direction;
the gas outlet of the sample gas storage device is connected with a No. 1 interface of a second automatic switching valve, a No. 10 interface and a No. 7 interface of the second automatic switching valve are connected through a first external gas circuit, a first quantitative ring is arranged on the first external gas circuit, a No. 6 interface and a No. 3 interface of the second automatic switching valve are connected through a second external gas circuit, a second quantitative ring is arranged on the second external gas circuit, a No. 2 interface of the second automatic switching valve is connected with a No. 1 interface of a fourth automatic switching valve through a fourth external gas circuit, a No. 10 interface of the fourth automatic switching valve is communicated with a No. 3 interface of the fourth automatic switching valve through a third external gas circuit, and a third quantitative ring is arranged on the third external gas circuit;
the gas outlet of the carrier gas storage device is communicated with the No. 1 interface of the first automatic switching valve, the No. 2 interface of the first automatic switching valve is connected with one end of a first gas channel, one end of the first carrier gas is connected with the No. 9 interface of the second automatic switching valve, the other end of the first carrier gas is communicated with the first gas channel, the No. 8 interface of the second automatic switching valve is connected with the No. 1 interface of the third automatic switching valve through a fifth external gas channel, the fifth external gas channel is provided with a first chromatographic column, the No. 2 interface of the third automatic switching valve is connected with the No. 1 interface of the fifth automatic switching valve through a sixth external gas channel, the No. 3 interface of the third automatic switching valve is communicated with the first gas channel through a third carrier gas channel, the No. 4 interface of the third automatic switching valve is connected with the No. 3 interface of the fifth automatic switching valve through a thirteenth external gas channel, the thirteenth external gas channel is provided with a second chromatographic column, and the No. 2 interface of the fifth automatic switching valve is connected with a second detector device;
the interface No. 4 of the second automatic switching valve is communicated with the first gas channel through a second carrier gas, one end of a seventh external gas channel is connected with the interface No. 5 of the second automatic switching valve, the other end of the seventh external gas channel is connected with the interface No. 3 of the sixth automatic switching valve, a fifth chromatographic column is arranged on the seventh external gas channel, the interface No. 2 of the sixth automatic switching valve is connected with the first detector device through an eighth external gas channel, and a sixth chromatographic column is arranged on the eighth external gas channel;
the interface No. 4 of the fourth automatic switching valve is connected with the interface No. 1 of the sixth automatic switching valve through a seventh carrier gas and a fifth carrier gas, a second plane four-way is arranged between the seventh carrier gas and the fifth carrier gas, the other end of the first gas circuit is communicated with the second plane four-way, the interface No. 9 of the fourth automatic switching valve is connected with the interface No. 6 of the fourth automatic switching valve through a ninth external gas circuit, a fourth chromatographic column is arranged on the ninth external gas circuit, one end of the tenth external gas circuit is connected with the interface No. 5 of the fourth automatic switching valve, the other end of the tenth external gas circuit is communicated with the eleventh external gas circuit, and a third plane three-way is arranged at the communicating position; one end of the eleventh external air passage is connected with the No. 3 interface of the first automatic switching valve, and the other end of the eleventh external air passage is connected with the No. 4 interface of the sixth automatic switching valve; the interface No. 8 of the fourth automatic switching valve is connected with the second plane four-way through a sixth carrier gas, and the interface No. 7 of the fourth automatic switching valve is communicated with an eighth external gas circuit through a twelfth external gas circuit;
the No. 4 interface of the fifth automatic switching valve is communicated with an eleventh external air passage through a fourteenth external air passage.
The analysis method of the component content of the mixed gas in the gas insulated combined electrical system is realized according to the following steps:
1. sampling:
the mixed gas component is stored in the sample gas storage device, flows to the No. 1 interface of the second automatic switching valve through a gas circuit connecting pipeline, sequentially flows to the flowmeter device through the No. 10 interface of the second automatic switching valve, the first quantitative ring, the No. 7 interface of the second automatic switching valve, the No. 6 interface of the second automatic switching valve, the second quantitative ring and the No. 3 interface of the second automatic switching valve, and flows from the No. 2 interface of the second automatic switching valve to the No. 1 interface of the fourth automatic switching valve, the No. 10 interface of the fourth automatic switching valve, the third quantitative ring, the No. 3 interface of the fourth automatic switching valve and the No. 2 interface of the fourth automatic switching valve;
2. the measuring process of the content of the oxyhydrogen and the carbon monoxide comprises the following steps:
the second automatic switching valve switches the connection interface, the first carrier gas sequentially passes through a No. 9 interface of the second automatic switching valve, a No. 10 interface of the second automatic switching valve, a first quantitative ring, a No. 7 interface of the second automatic switching valve and a No. 8 interface of the second automatic switching valve, enters the first chromatographic column for pre-separation, then flows into the third carrier chromatographic column for re-separation after passing through a No. 1 interface and a No. 2 interface of the third automatic switching valve, and finally flows into the second detector device for detecting the component content of the hydrogen, the nitrogen and the carbon monoxide after passing through the fifth automatic switching valve;
3. the determination process of the carbon tetrafluoride methane nitrogen trifluoride carbon dioxide nitrous oxide hexafluoroethane content comprises the following steps:
the first carrier gas carries the mixed gas component in the first quantitative ring into the first chromatographic column, when the carbon tetrafluoride component is separated from the first chromatographic column, the connection interface of the third automatic switching valve is switched, and the carbon tetrafluoride component flows through the second chromatographic column and the fifth automatic switching valve through the No. 1 interface and the No. 4 interface of the third automatic switching valve and is discharged from the second needle valve; when the carbon tetrafluoride component is completely discharged by the second needle valve, switching a connecting interface of a third automatic switching valve, enabling the first carrier gas to carry the pre-separated mixed component with the carbon tetrafluoride removed in the first chromatographic column to enter the second chromatographic column for re-separation, and detecting mixed component gas by a second detector device after passing through a fifth automatic switching valve; when hexafluoroethane in the mixed component is completely separated from the second chromatographic column, switching a connection interface of a fifth automatic switching valve, and discharging sulfur hexafluoride component from the second needle valve;
4. the measurement process of the content of sulfuryl fluoride, hydrogen sulfide, octafluoro propane carbonyl sulfide and thionyl fluoride comprises the following steps:
the second carrier gas carries mixed gas components in a second quantitative ring after passing through a No. 4 interface and a No. 3 interface of a second automatic switching valve, then enters a fifth chromatographic column through a No. 6 interface and a No. 5 interface of the second automatic switching valve, sulfur hexafluoride components separated by the fifth chromatographic column are discharged by a third needle valve after passing through a sixth automatic switching valve, when sulfuryl fluoride components are separated from the fifth chromatographic column, the connection interface of the sixth automatic switching valve is switched, the second carrier gas carries pre-separated sulfuryl fluoride hydrogen octafluoro-propane carbonyl sulfide thionyl fluoride components in the fifth chromatographic column to enter the sixth chromatographic column for re-separation through the No. 3 interface and the No. 2 interface of the sixth automatic switching valve, and the content of each component is detected by a first detector device;
5. the measurement process of the content of the sulfur dioxide carbon disulfide component comprises the following steps:
the seventh carrier gas carries the mixed gas component in the third metering ring to enter the fourth chromatographic column through the No. 10 interface and the No. 9 interface of the fourth automatic switching valve, the pre-separated oxyhydrogen component is discharged by the first needle valve, only sulfur dioxide and carbon disulfide component are reserved, when the sulfur dioxide component is separated from the fourth chromatographic column, the connection interface of the fourth automatic switching valve is switched, the sixth carrier gas carries the sulfur dioxide carbon disulfide component in the fourth chromatographic column through the No. 8 interface and the No. 9 interface of the fourth automatic switching valve to enter the first detector through the No. 6 interface and the No. 7 interface of the fourth automatic switching valve, and the sulfur dioxide carbon disulfide component is detected by the first detector.
The invention provides an analysis method and an analysis system for the content of a mixed gas component in gas insulation combined electricity, which are used for solving the problem that multiple components in the gas insulation combined electricity are difficult to detect. The invention utilizes a plurality of chromatographic columns of the multi-path carrier gas to completely separate 18 components such as hydrogen and oxygen, thereby ensuring the separation degree of the 18 components such as hydrogen and oxygen, and simultaneously ensuring the detection accuracy of the 18 components such as hydrogen and oxygen.
Drawings
FIG. 1 is a schematic diagram of a sampling process of an analysis system for the component content of a mixed gas in a gas insulated switchgear and a separation state of a fourth chromatographic column; in the figure, the device comprises a first pressure reducing device, a second pressure reducing device, a 4-carrier gas storage device, a 5-first automatic switching valve, a 6-sample recovery storage device, a 7-second automatic switching valve, an 8-first quantitative loop, a 9-second quantitative loop, a 10-first carrier gas, a 11-first chromatographic column, a 12-second carrier gas, a 13-first plane tee, a 14-first plane four-way, a 15-third automatic switching valve, a 16-third carrier gas, a 17-second chromatographic column, a 18-third chromatographic column, a 19-second needle valve, a 20-second plane tee, a 21-third quantitative loop, a 22-fourth automatic switching valve, a 23-flowmeter device, a 24-fourth chromatographic column, a 25-first needle valve, a 26-sixth carrier gas, a 27-fifth chromatographic column, a 28-fifth automatic switching valve, a 29-fourth carrier gas, a 30-sixth automatic switching valve, a 31-third needle valve, a 32-third plane tee, a 33-sixth chromatographic column, a third plane tee, a 34-fourth plane tee, a fourth plane detector, a seventh detector, a 37-fourth plane detector, and a fourth plane detector;
FIG. 2 is a schematic diagram of a third chromatographic column separation and a first needle valve vent state in an analysis system for the content of a mixed gas component in a gas insulated switchgear;
FIG. 3 is a schematic diagram of the venting state of a second needle valve in an analysis system for the component content of a mixed gas in a gas insulated switchgear;
FIG. 4 is a schematic diagram showing the separation state of a second chromatographic column in an analysis system for the component content of a mixed gas in a gas insulated switchgear;
fig. 5 is a schematic diagram showing a separation state of a sixth chromatographic column in an analysis system for the component content of a mixed gas in a gas insulated switchgear.
Detailed Description
The first embodiment is as follows: the analysis system for the component content of the mixed gas in the gas-insulated combined electrical system in this embodiment includes a sample gas storage device 2, a carrier gas storage device 4, a first automatic switching valve 5, a second automatic switching valve 7, a first quantifying ring 8, and a second quantifying ring 9, a first chromatographic column 11, a third automatic switching valve 15, a second chromatographic column 17, a third carrier chromatographic column 18, a third quantifying ring 21, a fourth automatic switching valve 22, a fourth chromatographic column 24, a fifth chromatographic column 27, a fifth automatic switching valve 28, a sixth automatic switching valve 30, a sixth chromatographic column 33, a first detector device 35, and a second detector device 36, wherein interfaces No. 1 are sequentially provided in the second automatic switching valve 7 and the fourth automatic switching valve 22 in a clockwise direction, and interfaces No. 1 are sequentially provided in the first automatic switching valve 5, the third automatic switching valve 15, the fifth automatic switching valve 28, and the sixth automatic switching valve 30 in a clockwise direction;
the gas outlet of the sample gas storage device 2 is connected with a No. 1 interface of a second automatic switching valve 7, a No. 10 interface and a No. 7 interface of the second automatic switching valve 7 are connected through a first external gas circuit, a first quantitative ring 8 is arranged on the first external gas circuit, a No. 6 interface and a No. 3 interface of the second automatic switching valve 7 are connected through a second external gas circuit, a second quantitative ring 9 is arranged on the second external gas circuit, a No. 2 interface of the second automatic switching valve 7 is connected with a No. 1 interface of a fourth automatic switching valve 22 through a fourth external gas circuit, a No. 10 interface of the fourth automatic switching valve 22 is communicated with a No. 3 interface of the fourth automatic switching valve 22 through a third external gas circuit, and a third quantitative ring 21 is arranged on the third external gas circuit;
the gas outlet of the carrier gas storage device 4 is communicated with the No. 1 interface of the first automatic switching valve 5, the No. 2 interface of the first automatic switching valve 5 is connected with one end of a first gas channel, one end of the first carrier gas 10 is connected with the No. 9 interface of the second automatic switching valve 7, the other end of the first carrier gas 10 is communicated with the first gas channel, the No. 8 interface of the second automatic switching valve 7 is connected with the No. 1 interface of the third automatic switching valve 15 through a fifth external gas channel, the fifth external gas channel is provided with a first chromatographic column 11, the No. 2 interface of the third automatic switching valve 15 is connected with the No. 1 interface of the fifth automatic switching valve 28 through a sixth external gas channel, the No. 3 interface of the third automatic switching valve 15 is communicated with the first gas channel through a third carrier gas 16, the No. 4 interface of the third automatic switching valve 15 is connected with the No. 3 interface of the fifth automatic switching valve 28 through a thirteenth external gas channel, the thirteenth external gas channel is provided with a second chromatographic column 17, and the No. 2 interface of the fifth automatic switching valve 28 is connected with a second detector 36;
the interface No. 4 of the second automatic switching valve 7 is communicated with the first air passage through the second carrier gas 12, one end of a seventh external air passage is connected with the interface No. 5 of the second automatic switching valve 7, the other end of the seventh external air passage is connected with the interface No. 3 of the sixth automatic switching valve 30, a fifth chromatographic column 27 is arranged on the seventh external air passage, the interface No. 2 of the sixth automatic switching valve 30 is connected with the first detector device 35 through an eighth external air passage, and a sixth chromatographic column 33 is arranged on the eighth external air passage;
the interface No. 4 of the fourth automatic switching valve 22 is connected with the interface No. 1 of the sixth automatic switching valve 30 through a fifth carrier gas 29, the other end of the first gas path is communicated with the fifth carrier gas 29, the interface No. 9 of the fourth automatic switching valve 22 is connected with the interface No. 6 of the fourth automatic switching valve 22 through a ninth external gas path, a fourth chromatographic column 24 is arranged on the ninth external gas path, one end of the tenth external gas path is connected with the interface No. 5 of the fourth automatic switching valve 22, the other end of the tenth external gas path is communicated with the eleventh external gas path, and a third plane tee 32 is arranged at the communicating position; one end of the eleventh external air passage is connected with the No. 3 interface of the first automatic switching valve 5, and the other end of the eleventh external air passage is connected with the No. 4 interface of the sixth automatic switching valve 30; the interface No. 8 of the fourth automatic switching valve 22 is communicated with a fourth carrier gas 29 through a sixth carrier gas 26, and the interface No. 7 of the fourth automatic switching valve 22 is communicated with an eighth external gas circuit through a twelfth external gas circuit;
the port No. 4 of the fifth automatic switching valve 28 is communicated with the eleventh external air passage through a fourteenth external air passage.
The second embodiment is as follows: the present embodiment differs from the specific embodiment in that the first detector means 35 and the second detector means 36 are both pulsed discharge helium ionization detectors.
And a third specific embodiment: the present embodiment differs from the first or second embodiment in that a first pressure reducing device 1 is provided at the gas outlet of the sample gas storage device 2, and a second pressure reducing device 3 is provided at the gas outlet of the carrier gas storage device 4.
The specific embodiment IV is as follows: the present embodiment differs from one to three embodiments in that the port No. 4 of the first automatic switching valve 5 is communicated with the air inlet of the sample collection and air storage device 6.
Fifth embodiment: the present embodiment differs from the first to fourth embodiments in that the No. 2 port of the fourth automatic switching valve 22 is connected to the flow meter device 23.
Specific embodiment six: the difference between this embodiment and the first to fifth embodiments is that the first plane tee 13 is disposed at the connection between the first carrier gas 10 and the first gas path, and the first plane four-way 14 is disposed at the connection between the second carrier gas 12 and the third carrier gas 16 and the first gas path.
Seventh embodiment: the difference between this embodiment and one of the first to sixth embodiments is that the communication between the fourteenth external air channel and the eleventh external air channel is provided with a second planar tee 20, and the communication between the twelfth external air channel and the eighth external air channel is provided with a fourth planar tee 34.
Eighth embodiment: the present embodiment differs from the first to seventh embodiments in that the second needle valve 19 is provided in the fourteenth external air passage, the first needle valve 25 is provided in the tenth external air passage, and the third needle valve 31 is provided in the eleventh external air passage.
Examples: the analysis method of the analysis system for the content of the mixed gas component in the gas insulated switchgear according to the embodiment is implemented according to the following steps:
1. sampling:
the mixed gas component is stored in the sample gas storage device 2, flows to the No. 1 interface of the second automatic switching valve 7 through a gas path connecting pipeline, sequentially flows to the flowmeter device 23 through the No. 10 interface of the second automatic switching valve 7, the first quantifying ring 8, the No. 7 interface of the second automatic switching valve 7, the No. 6 interface of the second automatic switching valve 7, the second quantifying ring 9 and the No. 3 interface of the second automatic switching valve 7, and flows from the No. 2 interface of the second automatic switching valve 7 to the No. 1 interface of the fourth automatic switching valve 22, the No. 10 interface of the fourth automatic switching valve 22, the third quantifying ring 21, the No. 3 interface of the fourth automatic switching valve 22 and the No. 2 interface of the fourth automatic switching valve 22 (as shown in fig. 1);
2. the measuring process of the content of the oxyhydrogen and the carbon monoxide comprises the following steps:
the second automatic switching valve 7 switches connection interfaces (as shown in fig. 2), the first carrier gas 10 sequentially passes through a No. 9 interface of the second automatic switching valve 7, a No. 10 interface of the second automatic switching valve 7, the first quantitative ring 8, a No. 7 interface of the second automatic switching valve 7 and a No. 8 interface of the second automatic switching valve 7, enters the first chromatographic column 11 for pre-separation, then passes through a No. 1 interface and a No. 2 interface of the third automatic switching valve 15, flows into the third carrier chromatographic column 18 for re-separation, and finally flows into the second detector device 36 for detecting the component content of the oxyhydrogen, nitrogen and carbon monoxide after passing through the fifth automatic switching valve 28;
3. the determination process of the carbon tetrafluoride methane nitrogen trifluoride carbon dioxide nitrous oxide hexafluoroethane content comprises the following steps:
the first carrier gas 10 carries the mixed gas component in the first quantitative ring 8 into the first chromatographic column 11, when the carbon tetrafluoride component is separated from the first chromatographic column 11, the connection interface of the third automatic switching valve 15 is switched (as shown in fig. 3), and the carbon tetrafluoride component flows through the No. 1 interface and the No. 4 interface of the third automatic switching valve 15, flows through the No. 4 interfaces of the second chromatographic column 17 and the fifth automatic switching valve 28, and is discharged from the second needle valve 19; when the carbon tetrafluoride component is completely discharged by the second needle valve 19, the connection interface of the third automatic switching valve 15 is switched (as shown in fig. 4), the first carrier gas 10 carries the pre-separated mixed component with carbon tetrafluoride removed of the first chromatographic column 11 to enter the second chromatographic column 17 for re-separation, and after passing through the fifth automatic switching valve 28, the mixed component gas is detected by the second detector device 36; switching the connection interface of the fifth automatic switching valve 28 when hexafluoroethane in the mixed components is completely separated from the second chromatographic column 17, and discharging sulfur hexafluoride components by the second needle valve 19;
4. the measurement process of the content of sulfuryl fluoride, hydrogen sulfide, octafluoro propane carbonyl sulfide and thionyl fluoride comprises the following steps:
as shown in fig. 3, the second carrier gas 12 carries the mixed gas component in the second quantitative ring 9 after passing through the port No. 4 and port No. 3 of the second automatic switching valve 7, then enters the fifth chromatographic column 27 through the port No. 6 and port No. 5 of the second automatic switching valve 7, the sulfur hexafluoride component separated by the fifth chromatographic column 27 is discharged by the third needle valve 31 after passing through the sixth automatic switching valve 30, when the sulfuryl fluoride component is separated from the fifth chromatographic column 27, the connection port of the sixth automatic switching valve 30 is switched to the state of fig. 5, the second carrier gas 12 carries the pre-separated sulfuryl fluoride hydrogen sulfide octafluoro-propane carbonyl sulfide thionyl fluoride component in the fifth chromatographic column 27, and after passing through the port No. 3 and port No. 2 of the sixth automatic switching valve 30, enters the sixth chromatographic column 33 for re-separation, and the content of each component is detected by the first detector device 35;
5. the measurement process of the content of the sulfur dioxide carbon disulfide component comprises the following steps:
as shown in fig. 3, the seventh carrier gas 38 (which enters the second planar four-way 37 from the port 2 of the first automatic switching valve 5 through the first gas path) carries the mixed gas component in the third quantitative loop 21 through the port 4 and port 3 of the fourth automatic switching valve 22, enters the fourth chromatographic column 24 through the port 10 and port 9 of the fourth automatic switching valve 22, the pre-separated oxyhydrogen component is discharged by the first needle valve 25, only the sulfur dioxide and the carbon disulfide component are retained, when the sulfur dioxide component is separated from the fourth chromatographic column 24, the state of the connection interface of the fourth automatic switching valve 22 is switched to be in fig. 1, and the sixth carrier gas 26 (the sixth carrier gas 26 is carried by the port 2 of the first automatic switching valve 5-the first gas path-second planar four-way 37-sixth carrier gas 26) through the port 8 and port 9 of the fourth automatic switching valve 22, carries the sulfur dioxide component in the fourth chromatographic column 24 through the port 6 and port 7 of the fourth automatic switching valve 22, and is detected by the first detector 35.
In the embodiment, in order to ensure that the sampling of each quantitative ring is carried out by one ventilation and the complete separation of 18 components by one sample injection, the qualitative and quantitative accuracy is ensured, the components are not interfered with each other, and the separation degree R is more than or equal to 1.5.
In the embodiment, 18 components such as hydrogen and oxygen are completely separated by utilizing a plurality of chromatographic columns with multiple carrier gases, so that the separation degree of the 18 components such as hydrogen and oxygen is ensured, and meanwhile, the accuracy of detecting the 18 components such as hydrogen and oxygen is also ensured.
Claims (10)
1. The analysis system for the component content of the mixed gas in the gas insulation combined electrical system is characterized by comprising a sample gas storage device (2), a carrier gas storage device (4), a first automatic switching valve (5), a second automatic switching valve (7), a first quantitative ring (8) and a second quantitative ring (9), wherein a first chromatographic column (11), a third automatic switching valve (15), a second chromatographic column (17), a third load chromatographic column (18), a third quantitative ring (21), a fourth automatic switching valve (22), a fourth chromatographic column (24), a fifth chromatographic column (27), a fifth automatic switching valve (28), a sixth automatic switching valve (30), a sixth chromatographic column (33), a first detector device (35) and a second detector device (36), wherein interfaces No. 1-10 are sequentially arranged in the second automatic switching valve (7) and the fourth automatic switching valve (22) in a clockwise direction respectively, and interfaces No. 1-10 are sequentially arranged in the first automatic switching valve (5), the third automatic switching valve (15), the fifth automatic switching valve (28) and the sixth automatic switching valve (30) in the clockwise direction respectively;
the gas outlet of the sample gas storage device (2) is connected with a No. 1 interface of a second automatic switching valve (7), a No. 10 interface and a No. 7 interface of the second automatic switching valve (7) are connected through a first external gas circuit, a first quantitative ring (8) is arranged on the first external gas circuit, a No. 6 interface and a No. 3 interface of the second automatic switching valve (7) are connected through a second external gas circuit, a second quantitative ring (9) is arranged on the second external gas circuit, a No. 2 interface of the second automatic switching valve (7) is connected with a No. 1 interface of a fourth automatic switching valve (22) through a fourth external gas circuit, a No. 10 interface of the fourth automatic switching valve (22) is communicated with a No. 3 interface of the fourth automatic switching valve (22) through a third external gas circuit, and a third quantitative ring (21) is arranged on the third external gas circuit;
the gas outlet of the carrier gas storage device (4) is communicated with the No. 1 interface of the first automatic switching valve (5), the No. 2 interface of the first automatic switching valve (5) is connected with one end of a first gas channel, one end of the first carrier gas (10) is connected with the No. 9 interface of the second automatic switching valve (7), the other end of the first carrier gas (10) is communicated with the first gas channel, the No. 8 interface of the second automatic switching valve (7) is connected with the No. 1 interface of the third automatic switching valve (15) through a fifth external gas channel, the fifth external gas channel is provided with a first chromatographic column (11), the No. 2 interface of the third automatic switching valve (15) is connected with the No. 1 interface of the fifth automatic switching valve (28) through a sixth external gas channel, the No. 3 interface of the third automatic switching valve (15) is communicated with the first gas channel through a third carrier gas (16), the No. 4 interface of the third automatic switching valve (15) is connected with the No. 3 interface of the fifth automatic switching valve (28) through a thirteenth external gas channel, and the fifth external gas channel is provided with a fifth chromatographic column (36) is connected with the No. 2 interface of the fifth automatic switching valve (28);
the interface No. 4 of the second automatic switching valve (7) is communicated with the first air passage through a second carrier gas (12), one end of a seventh external air passage is connected with the interface No. 5 of the second automatic switching valve (7), the other end of the seventh external air passage is connected with the interface No. 3 of the sixth automatic switching valve (30), a fifth chromatographic column (27) is arranged on the seventh external air passage, the interface No. 2 of the sixth automatic switching valve (30) is connected with the first detector device (35) through an eighth external air passage, and a sixth chromatographic column (33) is arranged on the eighth external air passage;
the interface No. 4 of the fourth automatic switching valve (22) is connected with the interface No. 1 of the sixth automatic switching valve (30) through a seventh carrier gas (38) and a fifth carrier gas (29), a second plane four-way (37) is arranged between the seventh carrier gas (38) and the fifth carrier gas (29), the other end of the first gas path is communicated with the second plane four-way (37), the interface No. 9 of the fourth automatic switching valve (22) is connected with the interface No. 6 of the fourth automatic switching valve (22) through a ninth external gas path, a fourth chromatographic column (24) is arranged on the ninth external gas path, one end of the tenth external gas path is connected with the interface No. 5 of the fourth automatic switching valve (22), and the other end of the tenth external gas path is communicated with the eleventh external gas path and is provided with a third plane three-way (32) at the communication position; one end of the eleventh external air passage is connected with the No. 3 interface of the first automatic switching valve (5), and the other end of the eleventh external air passage is connected with the No. 4 interface of the sixth automatic switching valve (30); the interface No. 8 of the fourth automatic switching valve (22) is connected with the second plane four-way (37) through a sixth carrier gas (26), and the interface No. 7 of the fourth automatic switching valve (22) is communicated with an eighth external gas circuit through a twelfth external gas circuit;
the No. 4 interface of the fifth automatic switching valve (28) is communicated with an eleventh external air passage through a fourteenth external air passage.
2. Analysis system of the component content of a mixed gas in a gas insulated switchgear according to claim 1, characterized in that the first detector means (35) and the second detector means (36) are both pulsed discharge helium ionization detectors.
3. The analysis system for the component content of the mixed gas in the gas-insulated combined electrical system according to claim 1, wherein a first pressure reducing device (1) is arranged at the gas outlet of the sample gas storage device (2), and a second pressure reducing device (3) is arranged at the gas outlet of the carrier gas storage device (4).
4. The analysis system for the component content of the mixed gas in the gas-insulated switchgear according to claim 1, wherein the port No. 4 of the first automatic switching valve (5) is communicated with the gas inlet of the sample recovery gas storage device (6).
5. The system for analyzing the component content of a mixed gas in a gas-insulated switchgear according to claim 1, wherein the No. 2 port of the fourth automatic switching valve (22) is connected to a flow meter device (23).
6. The analysis system for the component content of the mixed gas in the gas-insulated combined electrical system according to claim 1, wherein a first plane tee joint (13) is arranged at the communication position of the first carrier gas (10) and the first gas path, and a first plane four-way joint (14) is arranged at the communication position of the second carrier gas (12) and the third carrier gas (16) and the first gas path.
7. The analysis system for the component content of the mixed gas in the gas-insulated switchgear according to claim 1, wherein a second planar tee (20) is provided at a connection between the fourteenth external gas channel and the eleventh external gas channel, and a fourth planar tee (34) is provided at a connection between the twelfth external gas channel and the eighth external gas channel.
8. The analysis system for the component content of a mixed gas in a gas-insulated switchgear according to claim 1, characterized in that a second needle valve (19) is provided on a fourteenth external gas path, a first needle valve (25) is provided on a tenth external gas path, and a third needle valve (31) is provided on an eleventh external gas path.
9. The analysis method for the content of the mixed gas component in the gas insulated combined electrical system is characterized by comprising the following steps of:
1. sampling:
the mixed gas component is stored in a sample gas storage device (2), flows to a No. 1 interface of a second automatic switching valve (7) through a gas path connecting pipeline, sequentially flows to a flowmeter device (23) through a No. 10 interface of the second automatic switching valve (7), a first metering ring (8), a No. 7 interface of the second automatic switching valve (7), a No. 6 interface of the second automatic switching valve (7), a second metering ring (9) and a No. 3 interface of the second automatic switching valve (7), and flows from a No. 2 interface of the second automatic switching valve (7) to a No. 1 interface of a fourth automatic switching valve (22), a No. 10 interface of the fourth automatic switching valve (22), and flows to a third metering ring (21), a No. 3 interface of the fourth automatic switching valve (22) and a No. 2 interface of the fourth automatic switching valve (22);
2. the determination process of the contents of hydrogen, oxygen, nitrogen and carbon monoxide comprises the following steps:
the second automatic switching valve (7) switches connection interfaces, the first carrier gas (10) sequentially passes through a No. 9 interface of the second automatic switching valve (7), a No. 10 interface of the second automatic switching valve (7), a first metering ring (8), a No. 7 interface of the second automatic switching valve (7) and a No. 8 interface of the second automatic switching valve (7) to enter the first chromatographic column (11) for pre-separation, then flows into the third chromatographic column (18) for re-separation after passing through a No. 1 interface and a No. 2 interface of the third automatic switching valve (15), and finally flows into the second detector device (36) for detecting the component content of hydrogen, oxygen, nitrogen and carbon monoxide after passing through the fifth automatic switching valve (28);
3. determination of carbon tetrafluoride, methane, nitrogen trifluoride, carbon dioxide, nitrous oxide and hexafluoroethane content:
the first carrier gas (10) carries the mixed gas component in the first quantitative ring (8) into the first chromatographic column (11), when the carbon tetrafluoride component is separated from the first chromatographic column (11), the connection interface of the third automatic switching valve (15) is switched, and the carbon tetrafluoride component flows through the second chromatographic column (17) and the fifth automatic switching valve (28) through the No. 1 interface and the No. 4 interface of the third automatic switching valve (15) and is discharged from the second needle valve (19); when the carbon tetrafluoride component is completely discharged by the second needle valve (19), switching the connecting interface of the third automatic switching valve (15), and after the first carrier gas (10) carries the pre-separated mixed component with carbon tetrafluoride removed by the first chromatographic column (11) to enter the second chromatographic column (17) for re-separation, measuring the mixed component gas by the second detector device (36) after passing through the fifth automatic switching valve (28); switching the connection interface of a fifth automatic switching valve (28) when hexafluoroethane in the mixed components is completely separated from the second chromatographic column (17), and emptying the sulfur hexafluoride component by the second needle valve (19);
4. measurement of sulfuryl fluoride, hydrogen sulfide, octafluoropropane, carbonyl sulfide, and thionyl fluoride content:
the second carrier gas (12) carries mixed gas components in the second quantitative ring (9) after passing through a No. 4 interface and a No. 3 interface of the second automatic switching valve (7), then enters a fifth chromatographic column (27) through a No. 6 interface and a No. 5 interface of the second automatic switching valve (7), sulfur hexafluoride components separated by the fifth chromatographic column (27) are discharged by a third needle valve (31) after passing through a sixth automatic switching valve (30), when sulfuryl fluoride components are separated from the fifth chromatographic column (27), the connection interface of the sixth automatic switching valve (30) is switched, the second carrier gas (12) carries sulfuryl fluoride, hydrogen sulfide, octafluoropropane, carbonyl sulfide and thionyl fluoride components pre-separated in the fifth chromatographic column (27) to enter the sixth chromatographic column (33) for re-separation through the No. 3 interface and the No. 2 interface of the sixth automatic switching valve (30), and the content of each component is detected by a first detector device (35);
5. the measuring process of the content of sulfur dioxide and carbon disulfide components comprises the following steps:
the seventh carrier gas (38) carries the mixed gas component in the third metering ring (21) to enter the fourth chromatographic column (24) through a No. 10 interface and a No. 9 interface of the fourth automatic switching valve (22), the pre-separated oxyhydrogen component is discharged by the first needle valve (25), only sulfur dioxide and carbon disulfide component are reserved, when the sulfur dioxide component is separated from the fourth chromatographic column (24), the connection interface of the fourth automatic switching valve (22) is switched, the sixth carrier gas (26) carries the sulfur dioxide and the carbon disulfide component in the fourth chromatographic column (24) through a No. 8 interface and a No. 9 interface of the fourth automatic switching valve (22) to enter the first detector device (35) through a No. 6 interface and a No. 7 interface of the fourth automatic switching valve (22), and the sulfur dioxide and the carbon disulfide component are detected by the first detector device (35).
10. The method for analyzing the component content of the mixed gas in the gas-insulated switchgear according to claim 9, wherein in the fifth step, the seventh carrier gas (38) enters the second planar four-way (37) through the first gas path from the port No. 2 of the first automatic switching valve (5).
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| CN114609281A (en) * | 2022-03-16 | 2022-06-10 | 国网安徽省电力有限公司电力科学研究院 | System and method for measuring content of impurity components in perfluoroisobutyronitrile |
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| CN114609283B (en) * | 2022-03-16 | 2023-10-27 | 国网安徽省电力有限公司电力科学研究院 | System and method for measuring decomposition products in perfluoroisobutyronitrile |
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| CN102353737A (en) * | 2011-08-26 | 2012-02-15 | 广东电网公司电力科学研究院 | Detection device for detecting sulfur hexafluoride electrical equipment fault gas |
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| CN213933728U (en) * | 2020-12-22 | 2021-08-10 | 国网安徽省电力有限公司电力科学研究院 | Sulfur hexafluoride nitrogen gas mixture decomposition product analysis system |
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