A mobile detection device and method for SF6 decomposition product detection

Abstract

A mobile detection device and method for SF6 decomposition product detection, comprising a pretreatment unit, an enrichment unit, a chromatographic unit, a carrier gas unit, a sample interface in communication with the pretreatment unit for controlling the entry of sample gas, a standard gas interface in communication with the pretreatment unit for controlling the entry of standard gas, a carrier gas interface in communication with the chromatographic unit for driving the sample gas to flow in the chromatographic unit, and a driving gas interface in communication with the chromatographic unit for driving the switching valve in the chromatographic unit to reverse. The problem of limited use environment and poor sensitivity of the existing SF6 decomposition product detection device is solved. The gas source, sample pretreatment, sample component enrichment, chromatographic analysis instrument and tail gas absorption are integrated, and the low-temperature adsorption-plasma detector is adopted, which greatly improves the detection sensitivity and can monitor in real time whether the high-voltage electrical equipment has safety hazards. It has great guiding significance for different production sites.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of gas chromatographic detection and analysis, and particularly relates to a mobile detection device and method for SF6 decomposition product detection. BACKGROUND

[0002] SF6 gas is applied to high-voltage electrical equipment such as gas-insulated metal-enclosed switchgear, circuit breaker, transformer, etc. in the 1960s due to its excellent insulation and arc extinguishing performance. When defects such as discharge and abnormal heating occur inside the electrical equipment, part of the SF6 will decompose to generate low fluorides such as SF2, SF3, SF4, S2F10, etc. Most of these low fluorides will recombine with F atoms to generate SF6 in a very short time, but a small part of the low fluorides will further react with a small amount of O2 and moisture inside the equipment to generate relatively stable gas decomposition products, including fluorosulfinyl (SOF2), sulfuryl fluoride (SO2F2), sulfur dioxide (SO2), etc. When the fault involves solid insulation, carbon tetrafluoride (CF4), carbon monoxide (CO), carbon dioxide (CO2), etc. may be generated. Therefore, by detecting and tracking the changes in the composition and concentration of gas products in SF6 electrical equipment, important data basis can be provided for fault analysis and trend judgment of the equipment, and effective technical means can be provided for safe operation of the equipment.

[0003] The prior art has the following technical problems:

[0004] Most of the existing SF6 decomposition product detection devices on the market cannot realize accurate online real-time detection and have low sensitivity, resulting in low detection and early warning efficiency, certain safety hazards for on-site workers, and difficulty in adapting to the detection needs of different production sites.

[0005] Therefore, it is necessary to develop a mobile ultra-high sensitivity detection device and method for SF6 decomposition product detection.

[0006] The technical problem to be solved by the present application is to solve the problems in the background art, provide a mobile detection device for SF6 decomposition product detection, which has an online double detection mode, is convenient for detection at any time and any place in different production sites, and greatly improves the detection sensitivity of the device by using low-temperature adsorption-plasma detection, thereby meeting the detection needs of production sites.

[0007] Another technical problem to be solved by the present application is to provide a method for the mobile detection device for SF6 decomposition product detection.

[0008] In order to realize the above technical features, the purpose of the present application is realized as follows:

[0009] A mobile detection device for SF6 decomposition product detection, comprising

[0010] A pretreatment unit for pretreating an SF6 sample gas to be detected;

[0011] An enrichment unit in communication with the pretreatment unit for automatic adsorption and desorption of SF6 decomposition product impurities;

[0012] A chromatography unit in communication with the enrichment unit, comprising a plurality of switching valves, a quantitative ring, a chromatography column, and a plasma detector, which are internally connected by gas path pipelines, for analysis and detection of SF6 decomposition products;

[0013] A carrier gas unit, comprising a sample interface, a standard gas interface, a carrier gas interface, and a driving gas interface, the sample interface being in communication with the pretreatment unit for controlling the entry of sample gas, the standard gas interface being in communication with the pretreatment unit for controlling the entry of standard gas, the carrier gas interface being in communication with the chromatography unit for pushing the sample gas to flow in the chromatography unit, and the driving gas interface being in communication with the chromatography unit for driving the switching valves in the chromatography unit to change direction.

[0014] The pretreatment unit comprises a pressure reducing valve, a three-way valve, a filter, and a needle valve connected in sequence by pipelines, the sample interface is connected to the gas inlet of the pressure reducing valve, the gas outlet of the needle valve is connected to the enrichment unit through a gas inlet pipeline, and the standard gas interface is in communication with the three-way valve.

[0015] The enrichment unit comprises a first enrichment device and a second enrichment device, the first enrichment device and the second enrichment device have the same structure, the first enrichment device comprises a low-temperature trapping trap, a high-temperature heating zone, and an analysis tube, the low-temperature trapping trap and the high-temperature heating zone are installed in a left-right interval, reciprocating extension devices are respectively arranged on the two sides of the low-temperature trapping trap and the high-temperature heating zone, and the two ends of the analysis tube are respectively installed on the reciprocating extension devices, the reciprocating extension devices can drive the analysis tube to move back and forth between the low-temperature trapping trap and the high-temperature heating zone.

[0016] The chromatography unit comprises six switching valves, two quantitative rings, seven chromatography columns, and two plasma detectors, wherein the six switching valves comprise a ten-way valve one, a six-way valve two, a ten-way valve three, a six-way valve four, a ten-way valve five, and a six-way valve six, the two quantitative rings comprise a quantitative ring one and a quantitative ring two, the seven chromatography columns comprise a chromatography column one, a chromatography column two, a chromatography column three, a chromatography column four, a chromatography column five, a chromatography column six, and a chromatography column seven, and the two plasma detectors comprise a plasma detector one and a plasma detector two; the driving gas interface is connected to the six switching valves respectively for driving the switching valves to change direction.

[0017] The pre-treatment unit is communicated with the interface one of the ten-way valve one through the gas inlet pipeline, the interface ten of the ten-way valve one is communicated with one end of the resolving pipeline of the first enrichment device, the other end of the resolving pipeline of the first enrichment device is communicated with the interface seven of the ten-way valve one, the interface six of the ten-way valve one is communicated with one end of the resolving pipeline of the second enrichment device, the other end of the resolving pipeline of the second enrichment device is communicated with the interface three of the ten-way valve one, the interface two of the ten-way valve one is communicated with the interface one of the ten-way valve three, the interface ten of the ten-way valve three is communicated with the interface three of the ten-way valve three through the constant flow ring one, the interface two of the ten-way valve three is communicated with the interface one of the ten-way valve five, the interface ten of the ten-way valve five is communicated with the interface three of the ten-way valve five through the constant flow ring two, and the interface two of the ten-way valve five is connected with the sample discharge pipeline.

[0018] The carrier gas interface is divided into seven carrier gas paths through the seven-way joint;

[0019] The carrier gas one is communicated with the interface nine of the ten-way valve one, the interface eight of the ten-way valve one is communicated with one end of the chromatographic column three, the other end of the chromatographic column three is communicated with the interface four of the six-way valve four, and the interface five of the six-way valve four is vented;

[0020] The carrier gas two is communicated with the interface four of the ten-way valve one, the interface five of the ten-way valve one is communicated with one end of the chromatographic column one, the other end of the chromatographic column one is communicated with the interface six of the six-way valve two, the interface one of the six-way valve two is communicated with one end of the chromatographic column two, the other end of the chromatographic column two is communicated with the interface two of the six-way valve four, and the interface three of the six-way valve four is communicated with the plasma detector one;

[0021] The carrier gas three is communicated with the interface two of the six-way valve two, the interface three of the six-way valve two is communicated with the interface five of the six-way valve two, and the interface four of the six-way valve two is vented;

[0022] The carrier gas four is communicated with the interface four of the ten-way valve three, the interface five of the ten-way valve three is communicated with one end of the chromatographic column four, the other end of the chromatographic column four is connected with the interface nine of the ten-way valve three, and the interface eight of the ten-way valve three is connected with the venting needle valve;

[0023] The carrier gas five is communicated with the interface seven of the ten-way valve three, the interface six of the ten-way valve three is communicated with one end of the chromatographic column five, the other end of the chromatographic column five is communicated with the interface six of the six-way valve six, the interface one of the six-way valve six is communicated with the plasma detector two;

[0024] The carrier gas six is communicated with the interface seven of the ten-way valve five, the interface six of the ten-way valve five is communicated with one end of the chromatographic column seven, the other end of the chromatographic column seven is communicated with the interface two of the six-way valve six, and the interface three of the six-way valve six is vented;

[0025] The carrier gas seven is communicated with the interface four of the ten-way valve five, the interface five of the ten-way valve five is communicated with one end of the chromatographic column six, the other end of the chromatographic column six is communicated with the interface nine of the ten-way valve five, and the interface eight of the ten-way valve five is connected with the venting needle valve.

[0026] The tail gas absorption device comprises a flow meter, a one-way valve and an adsorption tank connected in sequence, and the flow meter is connected with the exhaust pipeline.

[0027] The pretreatment unit, the enrichment unit, the chromatographic unit and the tail gas absorption device are installed in the cabinet, one side of the cabinet is provided with an opening and closing door, the opening and closing door is provided with a cylinder support for installing a carrier gas cylinder, and the other side of the cabinet is provided with a control device electrically connected with the plasma detector I and the plasma detector II of the chromatographic unit.

[0028] The method of the mobile detection equipment for SF6 decomposition product detection is used for the detection of SF6 decomposition products, and comprises the following steps:

[0029] S1. Switch the three-way valve to connect the standard gas interface to the pretreatment unit; and simultaneously pass the carrier gas through the carrier gas interface to the enrichment unit and the chromatographic unit;

[0030] S2. Pass the standard gas through the standard gas interface, and after the standard gas is filtered by the filter, the standard gas enters the needle valve to adjust the gas flow rate, and then enters the enrichment unit and the chromatographic unit, and the standard gas parameters are detected by the chromatographic unit;

[0031] S3. Switch the three-way valve to connect the sample interface to the pretreatment unit, pass the sample gas to be detected through the sample interface, and after the sample gas is decompressed by the pressure reducing valve and filtered by the filter, the sample gas enters the needle valve to adjust the gas flow rate, and then enters the enrichment unit and the chromatographic unit, and the detection result of the sample gas is obtained by the chromatographic unit.

[0032] The specific steps of S3 are as follows:

[0033] S31. Pass the carrier gas through the carrier gas interface to the enrichment unit and the chromatographic unit, at this time:

[0034] The carrier gas one enters the interface nine of the ten-way valve one, exits the interface eight of the ten-way valve one, then passes through the chromatographic column three to enter the interface four of the six-way valve four, and finally exits from the interface five of the six-way valve four to flush the chromatographic column three;

[0035] The carrier gas two enters the interface four of the ten-way valve one, exits the interface five of the ten-way valve one, then passes through the chromatographic column one to enter the interface six of the six-way valve two, enters the interface one of the six-way valve two to the chromatographic column two, then enters the interface two of the six-way valve four, and finally enters the interface three of the six-way valve four to the plasma detector I to flush the chromatographic column one and the chromatographic column two;

[0036] The carrier gas three enters the interface two of the six-way valve two, exits the interface three of the six-way valve two, then enters the interface five of the six-way valve two, and exits from the interface four of the six-way valve two;

[0037] The carrier gas five enters the interface seven of the ten-way valve three, exits from the interface six of the ten-way valve three, enters the interface six of the six-way valve six through the chromatographic column five, and finally enters the interface one of the six-way valve six to enter the plasma detector two, so as to flush the chromatographic column five;

[0038] The carrier gas five enters the interface seven of the ten-way valve three, exits from the interface six of the ten-way valve three, enters the interface six of the six-way valve six through the chromatographic column five, and finally enters the interface one of the six-way valve six to enter the plasma detector two, so as to flush the chromatographic column five;

[0039] The carrier gas five enters the interface seven of the ten-way valve three, exits from the interface six of the ten-way valve three, enters the interface six of the six-way valve six through the chromatographic column five, and finally enters the interface one of the six-way valve six to enter the plasma detector two, so as to flush the chromatographic column five;

[0040] The carrier gas five enters the interface seven of the ten-way valve three, exits from the interface six of the ten-way valve three, enters the interface six of the six-way valve six through the chromatographic column five, and finally enters the interface one of the six-way valve six to enter the plasma detector two, so as to flush the chromatographic column five;

[0041] S32. The sample gas enters the interface one of the ten-way valve one through the inlet pipeline after passing through the pressure reducing valve, the pressure reducing valve and the needle valve, enters the first enrichment device from the interface ten of the ten-way valve one, then enters the interface seven of the ten-way valve one, and then enters the second enrichment device from the interface six of the ten-way valve one, then enters the interface three of the ten-way valve one, and then enters the interface one of the ten-way valve three from the interface two of the ten-way valve one, then enters the interface ten of the ten-way valve three, then enters the interface three of the ten-way valve three, then enters the interface one of the ten-way valve five from the interface two of the ten-way valve three, then enters the interface ten of the ten-way valve five, then enters the interface three of the ten-way valve five, and then enters the exhaust pipeline from the interface two of the ten-way valve five, and then enters the tail gas absorption device, so that the sample gas is enriched and desorbed in the first enrichment device and the second enrichment device, and is stored in the quantitative ring one and the quantitative ring two;

[0042] S33. The drive gas interface is ventilated, and the ten-way valve one, the ten-way valve three and the ten-way valve five are controlled to change direction;

[0043] S34. The carrier gas one enters the interface nine of the ten-way valve one, exits from the interface ten of the ten-way valve one, pushes the sample gas into the interface seven of the ten-way valve one after passing through the first enrichment device, and then exits from the interface eight of the ten-way valve one to enter the chromatographic column three, so that the six-way valve four changes direction, then enters the interface four of the six-way valve four, and then enters the interface three of the six-way valve four to enter the plasma detector one, so as to detect the SO2 and CS2 components in the sample gas;

[0044] S35. The carrier gas two enters into the interface four of the ten-way valve one, and then enters into the second enrichment device from the interface three of the ten-way valve one, and then enters into the interface six of the ten-way valve one, and then enters into the chromatographic column one from the interface five of the ten-way valve one, and then enters into the interface six of the six-way valve two, and then enters into the chromatographic column two from the interface one of the six-way valve two, and then enters into the interface two of the six-way valve four, and then enters into the plasma detector one from the interface three of the six-way valve four, and the SO2F2, S2F, COS, SOF2, C3F8 components in the sample gas are detected;

[0045] S36. The six-way valve two is switched, the carrier gas three enters into the interface two of the six-way valve two, and then is discharged from the interface one of the six-way valve two, and then enters into the interface two of the six-way valve four through the chromatographic column two, and then enters into the plasma detector one from the interface three of the six-way valve four, and the chromatographic column two and the plasma detector one are flushed;

[0046] S37. The carrier gas four enters into the interface four of the ten-way valve three from the interface three of the ten-way valve three, and then enters into the interface ten of the ten-way valve three, and then is discharged from the interface nine of the ten-way valve three, and then enters into the chromatographic column four, and then enters into the interface five of the ten-way valve three, and then is discharged from the interface six of the ten-way valve three, and then enters into the chromatographic column five, and then enters into the interface six of the six-way valve six, and then is discharged from the interface one of the six-way valve six, and then enters into the plasma detector two, and the O2, N2, CO components in the gas are detected;

[0047] S38. The carrier gas five enters into the interface seven of the ten-way valve three, and then is discharged from the interface eight of the ten-way valve three; the carrier gas six enters into the interface seven of the ten-way valve five, and then is discharged from the interface eight of the ten-way valve five;

[0048] S39. The six-way valve six (V6) is switched, the carrier gas seven enters into the interface four of the ten-way valve five, and then is discharged from the interface three of the ten-way valve five, and then enters into the interface ten of the ten-way valve five, and then is discharged from the interface nine of the ten-way valve five, and then enters into the chromatographic column six, and then enters into the interface five of the ten-way valve five, and then is discharged from the interface six of the ten-way valve five, and then enters into the chromatographic column seven, and then enters into the interface two of the six-way valve six, and then is discharged from the interface one of the six-way valve six, and then enters into the plasma detector two, and the CF4, CO2, C2F6 components in the sample gas are detected.

[0049] The present application has the following beneficial effects:

[0050] The pretreatment device is used for sample gas filtration, pressure reduction and flow stabilization operation to make the sample reach the instrument analyzable condition; the enrichment device is used for automatic adsorption and desorption of SF6 decomposition product impurity components to reach a lower detection limit; the chromatographic device is used for analysis and detection of SF6 decomposition products; and the tail gas absorption device is used for effective absorption of SF6 decomposition products. The problems of limited use environment and poor sensitivity of the existing SF6 decomposition product detection equipment are solved. The equipment integrates gas source, sample pretreatment, sample component enrichment, chromatographic analysis instrument and tail gas absorption, and simultaneously adopts low-temperature adsorption-plasma detector, greatly improves the detection sensitivity, can on-line real-time monitor whether the high-voltage electrical equipment exists safety hidden trouble, and has great guiding significance for different production sites. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 It is a whole structure schematic diagram of the application.

[0052] Figure 2 It is another perspective structure schematic diagram of the application.

[0053] Figure 3 It is a structure principle diagram of the application.

[0054] Figure 4 It is a chromatographic unit structure principle diagram of the application.

[0055] Figure 5 It is an enrichment device structure principle diagram of the application.

[0056] In the figure:

[0057] Box 1, opening and closing door 11, steel bottle support 12, caster 13, handrail 14;

[0058] Pretreatment unit 2, pressure reducing valve 21, three-way valve 22, filter 23, needle valve 24, gas inlet pipeline 25;

[0059] Enrichment unit 3, first enrichment device 31, second enrichment device 32, low-temperature trapping trap 311, high-temperature heating zone 312, reciprocating telescopic device 313, analysis pipe 314, refrigerator 315, heating rod 316, platinum resistance 317;

[0060] Chromatographic unit 4, ten-way valve one V1, six-way valve two V2, ten-way valve three V3, six-way valve four V4, ten-way valve five V5, six-way valve six V6, quantitative ring one 41, quantitative ring two 42, chromatographic column one 43, chromatographic column two 44, chromatographic column three 45, chromatographic column four 46, chromatographic column five 47, chromatographic column six 48, chromatographic column seven 49, plasma detector one 91, plasma detector two 92;

[0061] Tail gas absorption device 5, exhaust pipeline 51, flowmeter 52, one-way valve 53, adsorption tank 54;

[0062] carrier gas cylinder 6, control device 7;

[0063] carrier gas unit 8, sample interface 81, standard gas interface 82, carrier gas interface 83, driving gas interface 84, seven-way joint 85. DETAILED DESCRIPTION

[0064] The embodiments of the present application will be further described below with reference to the accompanying drawings.

[0065] Example 1:

[0066] Referring to Figures 1-5 A mobile detection device for SF6 decomposition product detection, comprising

[0067] A pretreatment unit 2 for pretreating the SF6 sample gas to be detected;

[0068] An enrichment unit 3 in communication with the pretreatment unit 2 for automatic adsorption and desorption of SF6 decomposition product impurities;

[0069] A chromatography unit 4 in communication with the enrichment unit, comprising a plurality of switching valves, quantitative rings, chromatography columns and plasma detectors, internally connected by gas path pipelines, for analysis and detection of SF6 decomposition products;

[0070] A carrier gas unit 8 comprising a sample interface 81, a standard gas interface 82, a carrier gas interface 83 and a driving gas interface 84, the sample interface 81 being in communication with the pretreatment unit 2 for controlling the entry of sample gas, the standard gas interface 82 being in communication with the pretreatment unit 2 for controlling the entry of standard gas, the carrier gas interface 83 being in communication with the chromatography unit 4 for pushing the sample gas to flow in the chromatography unit 4, and the driving gas interface 84 being in communication with the chromatography unit 4 for driving the switching valves in the chromatography unit 4 to change direction.

[0071] The present application solves the problems of limited use environment and low sensitivity of existing SF6 decomposition product detection devices, integrates gas source, sample pretreatment, sample component enrichment, chromatography analysis instrument and tail gas absorption, and at the same time adopts low-temperature adsorption-plasma detector, greatly improves the detection sensitivity, can online real-time monitor whether there is a safety hazard in high-voltage electrical equipment, and has great guiding significance for different production sites.

[0072] Referring to Figure 3The pretreatment unit 2 comprises a pressure reducing valve 21, a three-way valve 22, a filter 23 and a needle valve 24 connected in sequence, the sample interface 81 is connected with the gas inlet of the pressure reducing valve 21, the gas outlet of the needle valve 24 is connected with the enrichment unit 3 through a gas inlet pipeline 25, and the standard gas interface 82 is communicated with the three-way valve 22. The sample is controlled to reduce the internal pressure to 0.1 MPa through the pressure reducing valve 21, then the gas pipeline is connected with the three-way valve 22 and enters the filter 23, the filter is used to remove gas dust and particles, and the needle valve 24 is used to stabilize the flow rate of 100 ml / min. Through the above structure, the sample is filtered, pressure-reduced and flow-stabilized through the pretreatment module to make the sample meet the analysis conditions of the instrument.

[0073] Referring to Figure 5 The enrichment unit 3 comprises a first enrichment device 31 and a second enrichment device 32, and the first enrichment device 31 and the second enrichment device 32 are the same in structure. The first enrichment device 31 comprises a low-temperature trapping trap 311, a high-temperature heating zone 312 and an analysis tube 314. The low-temperature trapping trap 311 and the high-temperature heating zone 312 are installed in the left and right positions. Reciprocating extension devices 313 are arranged on the two sides of the low-temperature trapping trap 311 and the high-temperature heating zone 312. The two ends of the analysis tube 314 are respectively installed on the reciprocating extension devices 313. The reciprocating extension devices 313 can drive the analysis tube 314 to move back and forth between the low-temperature trapping trap 311 and the high-temperature heating zone 312. Through the above structure, the automatic adsorption and desorption of SF6 decomposition product impurity components are controlled to achieve a lower detection limit.

[0074] In actual application, the reciprocating extension devices 313 can adopt electric push rods. Two electric push rods support and synchronously push and pull the analysis tube 314. The low-temperature trapping trap 311 is refrigerated by a refrigerator 315. The temperature control range is-20℃-30℃. Specifically, the refrigerator 315 adopts a semiconductor refrigeration device. The high-temperature heating zone 312 is heated by an electric heating rod 316. The temperature control range is 40℃-400℃. Platinum resistance 317 is installed on the low-temperature trapping trap 311 and the high-temperature heating zone 312, which is used for real-time temperature detection.

[0075] Referring to Figure 3 , 4 The chromatographic unit 4 comprises six switching valves, two quantitative rings, seven chromatographic columns and two plasma detectors. The six switching valves comprise a ten-way valve V1, a six-way valve V2, a ten-way valve V3, a six-way valve V4, a ten-way valve V5 and a six-way valve V6. The two quantitative rings comprise a quantitative ring 41 and a quantitative ring 42. The seven chromatographic columns comprise a chromatographic column 43, a chromatographic column 44, a chromatographic column 45, a chromatographic column 46, a chromatographic column 47, a chromatographic column 48 and a chromatographic column 49. The two plasma detectors comprise a plasma detector 91 and a plasma detector 92. The drive gas interface 84 is connected with the six switching valves, which is used for driving the switching valves to change direction.

[0076] Specifically, referring to Figure 4 , the pre-treatment unit 2 is connected to the interface one of the ten-way valve one V1 through the inlet pipeline 25, the interface ten of the ten-way valve one V1 is connected to one end of the resolving pipeline 314 of the first enrichment device 31, the other end of the resolving pipeline 314 of the first enrichment device 31 is connected to the interface seven of the ten-way valve one V1, the interface six of the ten-way valve one V1 is connected to one end of the resolving pipeline 314 of the second enrichment device 32, the other end of the resolving pipeline 314 of the second enrichment device 32 is connected to the interface three of the ten-way valve one V1, the interface two of the ten-way valve one V1 is connected to the interface one of the ten-way valve three V3, the interface ten of the ten-way valve three V3 is connected to the interface three of the ten-way valve three V3 through the constant flow ring one 41, the interface two of the ten-way valve three V3 is connected to the interface one of the ten-way valve five V5, the interface ten of the ten-way valve five V5 is connected to the interface three of the ten-way valve five V5 through the constant flow ring two 42, and the interface two of the ten-way valve five V5 is connected with the sample discharge pipeline 51.

[0077] Further, the carrier gas interface 83 is divided into seven carrier gases through the seven-way joint 85;

[0078] The carrier gas one 831 is connected to the interface nine of the ten-way valve one V1, the interface eight of the ten-way valve one V1 is connected to one end of the chromatographic column three 45, the other end of the chromatographic column three 45 is connected to the interface four of the six-way valve four V4, and the interface five of the six-way valve four V4 is vented.

[0079] The carrier gas two 832 is connected to the interface four of the ten-way valve one V1, the interface five of the ten-way valve one V1 is connected to one end of the chromatographic column one 43, the other end of the chromatographic column one 43 is connected to the interface six of the six-way valve two V2, the interface one of the six-way valve two V2 is connected to one end of the chromatographic column two 44, the other end of the chromatographic column two 44 is connected to the interface two of the six-way valve four V4, the interface three of the six-way valve four V4 is connected to the plasma detector one 91.

[0080] The carrier gas three 833 is connected to the interface two of the six-way valve two V2, the interface three of the six-way valve two V2 is connected to the interface five of the six-way valve two V2, and the interface four of the six-way valve two V2 is vented.

[0081] The carrier gas four 834 is connected to the interface four of the ten-way valve three V3, the interface five of the ten-way valve three V3 is connected to one end of the chromatographic column four 46, the other end of the chromatographic column four 46 is connected to the interface nine of the ten-way valve three V3, and the interface eight of the ten-way valve three V3 is connected with the venting needle valve.

[0082] The carrier gas five 835 is connected to the interface seven of the ten-way valve three V3, the interface six of the ten-way valve three V3 is connected to one end of the chromatographic column five 47, the other end of the chromatographic column five 47 is connected to the interface six of the six-way valve six V6, the interface one of the six-way valve six V6 is connected to the plasma detector two 92.

[0083] The carrier gas six 836 is communicated with the interface seven of the ten-way valve five V5, the interface six of the ten-way valve five V5 is communicated with one end of the chromatographic column seven 49, the other end of the chromatographic column seven 49 is communicated with the interface two of the six-way valve six V6, and the interface three of the six-way valve six V6 is vented.

[0084] The carrier gas seven 837 is communicated with the interface four of the ten-way valve five V5, the interface five of the ten-way valve five V5 is communicated with one end of the chromatographic column six 48, the other end of the chromatographic column six 48 is communicated with the interface nine of the ten-way valve five V5, and the interface eight of the ten-way valve five V5 is connected with a venting needle valve.

[0085] A precise detection system is formed by six switching valves, two constant weight rings, seven chromatographic columns and two plasma detectors.

[0086] Further, referring to Figure 3 Further, the tail gas absorption device 5 is further included, the tail gas treatment device 5 includes a flow meter 52, a one-way valve 53 and an adsorption tank 54 connected in sequence, and the flow meter 52 is connected with the exhaust pipeline 51. After the sample is analyzed by the chromatograph, the sample enters the flow meter from the exhaust pipeline 51, the current gas flow is monitored at 100 ml / min, the gas flow is connected with the one-way valve 53, the gas flow is unidirectional, backflow is prevented, the other end of the valve is connected with the adsorption tank 54, and the tail gas is fully recovered. The adsorption tank 54 is a 2L activated carbon adsorbent adsorption tank, is installed at the rear of the chromatographic device, is connected with the outlet pipeline of the chromatographic device, and can effectively absorb SF6 decomposition products.

[0087] Further, referring to Figure 1 、 2 Further, the box 1 is further included, the pretreatment unit 2, the enrichment unit 3, the chromatographic unit 4 and the tail gas absorption device 5 are installed in the box 1, the bottom of the box 1 is provided with a foot wheel 13 for facilitating movement, one side of the box 1 is provided with an opening and closing door 11, the opening and closing door is provided with a cylinder support 12, the cylinder support 12 is used for installing the carrier gas cylinder 6, the upper side of the box 1 located at the opening and closing door is provided with a handrail 14 for facilitating pushing, the other side of the box 1 is provided with a control device 7, and the control device 7 is electrically connected with the plasma detector one 91 and the plasma detector two 92 of the chromatographic unit 4. The rear side of the box 1 is designed as the opening and closing door 11, the rear end of the opening and closing door 11 is welded with the cylinder support 12, two 8L cylinder carriers can be carried, and the cylinder support 12 is used as a gas source for the chromatographic device. At the same time, the equipment is provided with a double-mode power supply system, a notebook computer and a special workstation device, a lithium battery and an external power supply circuit are connected with a PC port of the chromatographic device, are used for controlling the gas chromatograph, and transmit detection results to an external PC, can satisfy portable detection and mobile online monitoring of the chromatographic device.

[0088] Embodiment two:

[0089] The method for the mobile detection equipment for SF6 decomposition product detection comprises the following steps:

[0090] S1. Switch the three-way valve 22 to connect the standard gas interface 82 to the pretreatment unit 2; and simultaneously connect the carrier gas interface 83 to the enrichment unit 3 and the chromatographic unit 4.

[0091] S2. Connect the standard gas to the standard gas interface 82, and the standard gas is filtered by the filter 23, then enters the needle valve 24 to adjust the gas flow rate, and then enters the enrichment unit 3 and the chromatographic unit 4, and the standard gas parameters are detected by the chromatographic unit 4.

[0092] S3. Switch the three-way valve 22 to connect the sample interface 81 to the pretreatment unit 2, and connect the sample gas to be detected to the sample interface 81, and the sample gas is decompressed by the pressure reducing valve 21, filtered by the filter 23, then enters the needle valve 24 to adjust the gas flow rate, and then enters the enrichment unit 3 and the chromatographic unit 4, and the detection result of the sample gas is detected by the chromatographic unit 4.

[0093] The specific steps of S3 are as follows:

[0094] S31. Connect the carrier gas to the carrier gas interface 83 to the enrichment unit 3 and the chromatographic unit 4, and at this time:

[0095] The carrier gas one 831 enters the interface nine of the ten-way valve one V1, exits from the interface eight of the ten-way valve one V1, then enters the interface four of the six-way valve four V4 through the chromatographic column three 45, and finally exits from the interface five of the six-way valve four V4, so as to flush the chromatographic column three 45;

[0096] The carrier gas two 832 enters the interface four of the ten-way valve one V1, exits from the interface five of the ten-way valve one V1, then enters the interface six of the six-way valve two V2 through the chromatographic column one 43, enters the interface one of the six-way valve two V2 from the interface two of the six-way valve two V2, then enters the interface two of the six-way valve four V4, and finally enters the interface three of the six-way valve four V4, so as to flush the chromatographic column one 43 and the chromatographic column two 44.

[0097] The carrier gas three 833 enters the interface two of the six-way valve two V2 from the interface five of the six-way valve two V2, and exits from the interface four of the six-way valve two V2.

[0098] The carrier gas four 834 enters the interface four of the ten-way valve three V3 from the interface nine of the ten-way valve three V3, exits from the interface five of the ten-way valve three V3, then enters the interface nine of the ten-way valve three V3 through the chromatographic column four 46, and finally exits from the interface eight of the ten-way valve three V3, so as to flush the chromatographic column four 46.

[0099] Carrier gas 835 enters from port 7 of the 10-way valve 3V3 and exits from port 6 of the 10-way valve 3V3. It then passes through the chromatographic column 47 and enters port 6 of the 6-way valve 6V6. Finally, it enters the plasma detector 292 from port 1 of the 6-way valve 6V6 to flush the chromatographic column 47.

[0100] Carrier gas 6836 enters from port 7 of the 10-way valve 5V5 and exits from port 6 of the 10-way valve 5V5. After passing through the chromatographic column 749, it enters port 2 of the 6-way valve 6V6 and then exits from port 3 of the 6-way valve 6V6, thus rinsing the chromatographic column 749.

[0101] Carrier gas 7837 enters from port 4 of the 10-way valve 5V5 and exits from port 5 of the 10-way valve 5V5. After passing through the chromatographic column 648, it enters port 9 of the 10-way valve 5V5 and then exits from port 8 of the 10-way valve 5V5, thus rinsing the chromatographic column 648.

[0102] S32. After passing through pressure reducing valve 21, pressure reducing valve 21, and needle valve 24, the sample gas enters port 1 of ten-way valve 1V1 through inlet pipe 25, then enters the first enrichment device 31 from port 10 of ten-way valve 1V1, then enters port 7 of ten-way valve 1V1, then enters the second enrichment device 32 from port 6 of ten-way valve 1V1, then enters port 3 of ten-way valve 1V1, then enters port 1 of ten-way valve 3V3 from port 2 of ten-way valve 1V1, and finally enters the fixed-flow inlet gas from port 10 of ten-way valve 3V3. The sample gas enters through the first metering ring 41, then through the third port of the ten-way valve 3 (V3), then through the second port of the ten-way valve 3 (V3) to the first port of the ten-way valve 5 (V5), then through the tenth port of the ten-way valve 5 (V5) to the second metering ring 42, then through the third port of the ten-way valve 5 (V5), then through the second port of the ten-way valve 5 (V5) to the discharge pipe 51, and finally into the tail gas absorption device 5. The sample gas is enriched and desorbed in the first enrichment device 31 and the second enrichment device 32, and stored in the first metering ring 41 and the second metering ring 42.

[0103] S33. Drive air interface 84 is vented to control the reversal of ten-way valve 1V1, ten-way valve 3V3, and ten-way valve 5V5;

[0104] S34. Carrier gas 831 enters port nine of ten-way valve 1V1, exits port ten of ten-way valve 1V1, passes through the first enrichment device 31, and then pushes the sample gas into port seven of ten-way valve 1V1. It then exits port eight of ten-way valve 1V1 and enters chromatographic column three 45. The six-way valve four V4 reverses the flow, and the sample gas then enters port four of six-way valve four V4. Finally, it exits port three of six-way valve four V4 and enters plasma detector one 91 to detect SO2 and CS2 components in the sample gas.

[0105] S35. Carrier gas two 832 enters into interface four of ten-way valve one Vl, from interface three of ten-way valve one Vl into second enrichment device 32, then into interface six of ten-way valve one Vl, from interface five of ten-way valve one Vl into chromatographic column one 43, then into interface six of six-way valve two V2, from interface one of six-way valve two V2 into chromatographic column two 44, then into interface two of six-way valve four V4, from interface three of six-way valve four V4 into plasma detector one 91, to detect SO2F2, S2F, COS, SOF2, C3F8 components in sample gas.

[0106] S36. Six-way valve two V2 switches, carrier gas three 833 enters into interface two of six-way valve two V2, from interface one of six-way valve two V2, through chromatographic column two 44 into interface two of six-way valve four V4, from interface three of six-way valve four V4 into plasma detector one 91, to flush chromatographic column two 44, plasma detector one 91.

[0107] S37. Carrier gas four 834 enters from interface four of ten-way valve three V3, from interface three of ten-way valve three V3 into constant volume loop one 41, then into interface ten of ten-way valve three V3, from interface nine of ten-way valve three V3 into chromatographic column four 46, then into interface five of ten-way valve three V3, from interface six of ten-way valve three V3 into chromatographic column five 47, then into interface six of six-way valve six V6, from interface one of six-way valve six V6 into plasma detector two 92, to detect O2, N2, CO components in gas.

[0108] S38. Carrier gas five 835 enters into interface seven of ten-way valve three V3, then from interface eight of ten-way valve three V3; carrier gas six 836 enters into interface seven of ten-way valve five V5, then from interface eight of ten-way valve five V5.

[0109] S39. Six-way valve six V6 switches, carrier gas seven 837 enters into interface four of ten-way valve five V5, from interface three of ten-way valve five V5 into constant volume loop two 42, then into interface ten of ten-way valve five V5, from interface nine of ten-way valve five V5 into chromatographic column six 48, then into interface five of ten-way valve five V5, from interface six of ten-way valve five V5 into chromatographic column seven 49, then into interface two of six-way valve six V6, from interface one of six-way valve six V6 into plasma detector two 92, to detect CF4, CO2, C2F6 components in sample gas.

[0110] The sample gas first enters the pressure reducing valve 21, and the internal pressure is reduced to 0.1 MPa. The gas path pipe is connected to the three-ball valve 22, and the filter 23 is used to remove dust and particles. The gas path pipe is connected to the needle valve 24, and the internal gas flow rate is set to 100 ml / min. Then, the gas is fully adsorbed and desorbed in the enrichment unit 2, and enters the chromatographic column one 43, the chromatographic column two 44, the chromatographic column three 45, the chromatographic column four 46, the chromatographic column five 47, the chromatographic column six 48, the chromatographic column seven 49, and the ionization detector one 91 and the ionization detector two 92 PED for analysis. After chromatographic analysis of impurities, the sample gas enters the flow meter 52, which monitors the current gas flow rate of 100 ml / min. The gas path pipe is connected to the one-way valve 53 to ensure one-way gas flow and prevent backflow. The other end of the valve is connected to the adsorption tank 54 to fully recover the tail gas.

[0111] When the sample gas enters the first enrichment device 31 and then enters the second enrichment device 32, the ten-way selector valve V1 of the switching valve is switched to input the sample gas into the chromatographic column one 43, the chromatographic column two 44, and the chromatographic column three 45 through the gas path pipe.

[0112] The chromatographic column one 43 and the chromatographic column two 44 separate the sample gas adsorbed and desorbed by the second enrichment device 32, and then input the sample gas into the high-precision ionization detector PED1 to detect SO2F2, S2F, COS, SOF2, and C3F8 components in the gas.

[0113] The chromatographic column three 45 separates the sample gas adsorbed and desorbed by the enrichment device 1, and then inputs the sample gas into the high-precision ionization detector one 91 (PED1) to detect SO2 and CS2 components in the sample gas.

[0114] When the sample gas enters the quantitative ring one 41 and the quantitative ring two 42, the ten-way selector valve V3 and the ten-way selector valve V5 of the switching valve are switched to input the sample gas into the chromatographic column four 46, the chromatographic column five 47, the chromatographic column six 48, and the chromatographic column seven 49 through the gas path pipe.

[0115] The chromatographic column four 46 and the chromatographic column five 47 separate the sample gas from the quantitative ring one 41, and then input the sample gas into the high-precision ionization detector two 92 (PED2) to detect O2, N2, and CO components in the gas.

[0116] The chromatographic column six 48 and the chromatographic column seven 49 separate the sample gas from the quantitative ring two 42, and then input the sample gas into the high-precision ionization detector two 92 (PED2) to detect CF4, CO2, and C2F6 components in the sample gas.

[0117] After obtaining the detection result, according to the change of the electric signal of each channel in the detection result, a voltage change curve is drawn by using a drawing tool; and then according to the area of the voltage change curve and the time sequence of the peak, the component and the component content of the sample gas are analyzed and obtained.

Claims

1. A mobile detection device for detecting SF6 decomposition products, characterized in that: include The pretreatment unit (2) is used to pretreat the SF6 sample gas to be tested; The enrichment unit (3) is connected to the pretreatment unit (2) and is used for the automatic adsorption and desorption of impurity components of SF6 decomposition products. The chromatographic unit (4) is connected to the enrichment unit and includes multiple switching valves, a quantitative loop, a chromatographic column and a plasma detector. It is internally connected by a gas pipeline and is used for the analysis and detection of SF6 decomposition products. The carrier gas unit (8) includes a sample interface (81), a standard gas interface (82), a carrier gas interface (83), and a driving gas interface (84). The sample interface (81) is connected to the pretreatment unit (2), the standard gas interface (82) is connected to the pretreatment unit (2), the carrier gas interface (83) is connected to the chromatography unit (4), and the driving gas interface (84) is connected to the chromatography unit (4). The pretreatment unit (2) includes a pressure reducing valve (21), a three-way valve (22), a filter (23), and a needle valve (24) connected in sequence by pipes. The sample interface (81) is connected to the air inlet of the pressure reducing valve (21), the air outlet of the needle valve (24) is connected to the enrichment unit (3) through the air inlet pipe (25), and the standard gas interface (82) is connected to the three-way valve (22). The enrichment unit (3) includes a first enrichment device (31) and a second enrichment device (32). The first enrichment device (31) and the second enrichment device (32) have the same structure. The first enrichment device (31) includes a low-temperature trap (311), a high-temperature heating zone (312), and a resolution tube (314). The low-temperature trap (311) and the high-temperature heating zone (312) are installed on the left and right sides at intervals. Reciprocating telescopic devices (313) are provided on both sides of the low-temperature trap (311) and the high-temperature heating zone (312). The two ends of the resolution tube (314) are respectively installed on the reciprocating telescopic devices (313). The reciprocating telescopic devices (313) can drive the resolution tube (314) to move back and forth between the low-temperature trap (311) and the high-temperature heating zone (312). The chromatographic unit (4) includes six switching valves, two quantitative loops, seven chromatographic columns, and two plasma detectors. The six switching valves include a 10-way valve (V1), a 6-way valve (V2), a 10-way valve (V3), a 6-way valve (V4), a 10-way valve (V5), and a 6-way valve (V6). The two quantitative loops include a quantitative loop (41) and a quantitative loop (42). The seven chromatographic columns include a column (43), a column (44), a column (45), a column (46), a column (47), a column (48), and a column (49). The two plasma detectors include a plasma detector (91) and a plasma detector (92). The driving gas interface (84) is connected to the six switching valves respectively and is used to drive the switching valves to switch directions. The pretreatment unit (2) is connected to the interface 1 of the ten-way valve (V1) via the air intake pipe (25). The interface 10 of the ten-way valve (V1) is connected to one end of the analytical tube (314) of the first enrichment device (31). The other end of the analytical tube (314) of the first enrichment device (31) is connected to the interface 7 of the ten-way valve (V1). The interface 6 of the ten-way valve (V1) is connected to one end of the analytical tube (314) of the second enrichment device (32). The other end of the analytical tube (314) of the second enrichment device (32) is connected to the interface 7 of the ten-way valve (V1). The interface of the first valve (V1) is connected to the third port. The interface of the first valve (V1) is connected to the first port of the third valve (V3). The interface of the third valve (V3) is connected to the third port of the third valve (V3) through the first metering ring (41). The interface of the third valve (V3) is connected to the first port of the fifth valve (V5). The interface of the fifth valve (V5) is connected to the third port of the fifth valve (V5) through the second metering ring (42). The interface of the fifth valve (V5) is connected to the sample discharge pipe (51). The carrier gas interface (83) is divided into seven carrier gas channels via a seven-way connector (85); Carrier gas 1 (831) is connected to port 9 of 10-way valve 1 (V1), port 8 of 10-way valve 1 (V1) is connected to one end of chromatographic column 3 (45), the other end of chromatographic column 3 (45) is connected to port 4 of 6-way valve 4 (V4), and port 5 of 6-way valve 4 (V4) is vented. Carrier gas 2 (832) is connected to port 4 of 10-way valve 1 (V1), port 5 of 10-way valve 1 (V1) is connected to one end of chromatographic column 1 (43), the other end of chromatographic column 1 (43) is connected to port 6 of 6-way valve 2 (V2), port 1 of 6-way valve 2 (V2) is connected to one end of chromatographic column 2 (44), the other end of chromatographic column 2 (44) is connected to port 2 of 6-way valve 4 (V4), and port 3 of 6-way valve 4 (V4) is connected to plasma detector 1 (91). The carrier gas three (833) is connected to the interface two of the six-way valve two (V2), the interface three of the six-way valve two (V2) is connected to the interface five of the six-way valve two (V2), and the interface four of the six-way valve two (V2) is vented. Carrier gas four (834) is connected to port four of ten-way valve three (V3), port five of ten-way valve three (V3) is connected to one end of chromatographic column four (46), the other end of chromatographic column four (46) is connected to port nine of ten-way valve three (V3), and port eight of ten-way valve three (V3) is connected to an emptying needle valve. Carrier gas five (835) is connected to port seven of ten-way valve three (V3), port six of ten-way valve three (V3) is connected to one end of column five (47), the other end of column five (47) is connected to port six of six-way valve six (V6), and port one of six-way valve six (V6) is connected to plasma detector two (92). Carrier gas six (836) is connected to port seven of ten-way valve five (V5), port six of ten-way valve five (V5) is connected to one end of chromatographic column seven (49), the other end of chromatographic column seven (49) is connected to port two of six-way valve six (V6), and port three of six-way valve six (V6) is vented. Carrier gas seven (837) is connected to interface four of ten-way valve five (V5), interface five of ten-way valve five (V5) is connected to one end of chromatographic column six (48), the other end of chromatographic column six (48) is connected to interface nine of ten-way valve five (V5), and interface eight of ten-way valve five (V5) is connected to an emptying needle valve.

2. The mobile detection device for detecting SF6 decomposition products according to claim 1, characterized in that: It also includes an exhaust gas absorption device (5), which includes a flow meter (52), a one-way valve (53) and an adsorption tank (54) connected in sequence, and the flow meter (52) is connected to the discharge pipe (51).

3. A mobile detection device for detecting SF6 decomposition products according to claim 2, characterized in that: It also includes a housing (1), in which the pretreatment unit (2), enrichment unit (3), chromatography unit (4) and tail gas absorption device (5) are installed. A door (11) is provided on one side of the housing (1), and a cylinder bracket (12) is provided on the door. The cylinder bracket (12) is used to install a carrier gas cylinder (6). A control device (7) is provided on the other side of the housing (1). The control device (7) is electrically connected to the first plasma detector (91) and the second plasma detector (92) of the chromatography unit (4).

4. A method for detecting SF6 decomposition products using a mobile detection device as described in claim 3, characterized in that, Includes the following steps: S1. Switch the three-way valve (22) to connect the standard gas interface (82) to the pretreatment unit (2); and simultaneously introduce carrier gas into the enrichment unit (3) and the chromatography unit (4) through the carrier gas interface (83); S2. Standard gas is introduced into the standard gas interface (82). After being filtered by the filter (23), the standard gas enters the needle valve (24) and the gas flow rate is adjusted before entering the enrichment unit (3) and the chromatography unit (4). The standard gas parameters are detected and verified by the chromatography unit (4). S3. Switch the three-way valve (22), connect the sample interface (81) to the pretreatment unit (2), and introduce the sample gas to be detected through the sample interface (81). The sample gas is depressurized by the pressure reducing valve (21), filtered by the filter (23), and then enters the needle valve (24) to adjust the airflow speed before entering the enrichment unit (3) and the chromatography unit (4). The detection result of the sample gas is obtained by the chromatography unit (4).

5. The method according to claim 4, characterized in that, The specific steps of S3 are as follows: S31. Carrier gas is introduced into the enrichment unit (3) and the chromatography unit (4) through the carrier gas interface (83). At this time: Carrier gas 1 (831) enters from port 9 of the ten-way valve 1 (V1) and exits from port 8 of the ten-way valve 1 (V1). It then passes through the chromatographic column 3 (45) and enters port 4 of the six-way valve 4 (V4). Finally, it exits from port 5 of the six-way valve 4 (V4) to flush the chromatographic column 3 (45). Carrier gas 2 (832) enters from port 4 of the 10-way valve 1 (V1) and exits from port 5 of the 10-way valve 1 (V1). It then passes through the chromatographic column 1 (43) and enters port 6 of the 6-way valve 2 (V2). It then enters the chromatographic column 2 (44) from port 1 of the 6-way valve 2 (V2), and then enters port 2 of the 6-way valve 4 (V4). Finally, it enters the plasma detector 1 (91) from port 3 of the 6-way valve 4 (V4) to flush the chromatographic column 1 (43) and the chromatographic column 2 (44). Carrier gas 3 (833) enters from port 2 of the six-way valve 2 (V2) and exits from port 3 of the six-way valve 2 (V2). Then it enters from port 5 of the six-way valve 2 (V2) and exits from port 4 of the six-way valve 2 (V2). Carrier gas 4 (834) enters from port 4 of the ten-way valve 3 (V3) and exits from port 5 of the ten-way valve 3 (V3). It then passes through the chromatographic column 4 (46) and enters port 9 of the ten-way valve 3 (V3). Finally, it exits from port 8 of the ten-way valve 3 (V3) to flush the chromatographic column 4 (46). Carrier gas 5 (835) enters from port 7 of the 10-way valve 3 (V3) and exits from port 6 of the 10-way valve 3 (V3). It then passes through the chromatographic column 5 (47) and enters port 6 of the 6-way valve 6 (V6). Finally, it enters the plasma detector 2 (92) from port 1 of the 6-way valve 6 (V6) to flush the chromatographic column 5 (47). Carrier gas 6 (836) enters from port 7 of the ten-way valve 5 (V5) and exits from port 6 of the ten-way valve 5 (V5). After passing through the chromatographic column 7 (49), it enters port 2 of the six-way valve 6 (V6) and then exits from port 3 of the six-way valve 6 (V6) to flush the chromatographic column 7 (49). Carrier gas 7 (837) enters from port 4 of the ten-way valve 5 (V5) and exits from port 5 of the ten-way valve 5 (V5). After passing through the chromatographic column 6 (48), it enters port 9 of the ten-way valve 5 (V5) and exits from port 8 of the ten-way valve 5 (V5) to flush the chromatographic column 6 (48). S32. After passing through the pressure reducing valve (21), three-way valve (22), filter (23), and needle valve (24), the sample gas enters the port 1 of the ten-way valve (V1) through the inlet pipe (25), then enters the first enrichment device (31) from the port 10 of the ten-way valve (V1), then enters the port 7 of the ten-way valve (V1), then enters the second enrichment device (32) from the port 6 of the ten-way valve (V1), then enters the port 3 of the ten-way valve (V1), then enters the port 1 of the ten-way valve (V3) from the port 2 of the ten-way valve (V1), and finally exits from the port 10 of the ten-way valve (V3). The sample gas enters the first quantitative loop (41), then enters the third interface of the ten-way valve (V3), then enters the first interface of the ten-way valve (V5) from the second interface of the ten-way valve (V3), then enters the second quantitative loop (42) from the ten-way valve (V5), then enters the third interface of the ten-way valve (V5), then enters the discharge pipe (51) from the second interface of the ten-way valve (V5), and then enters the tail gas absorption device (5). The sample gas is enriched and desorbed in the first enrichment device (31) and the second enrichment device (32), and stored in the first quantitative loop (41) and the second quantitative loop (42). S33. The drive air interface (84) is ventilated to control the reversal of the ten-way valve one (V1), ten-way valve three (V3), and ten-way valve five (V5); S34. Carrier gas 1 (831) enters port 9 of ten-way valve 1 (V1), exits port 10 of ten-way valve 1 (V1), passes through the first enrichment device (31), and pushes the sample gas into port 7 of ten-way valve 1 (V1), then exits port 8 of ten-way valve 1 (V1), enters column 3 (45), switches direction at six-way valve 4 (V4), then enters port 4 of six-way valve 4 (V4), and then exits port 3 of six-way valve 4 (V4) into plasma detector 1 (91) to detect SO2 and CS2 components in the sample gas; S35. Carrier gas 2 (832) enters port 4 of ten-way valve 1 (V1), exits port 3 of ten-way valve 1 (V1) and enters the second enrichment device (32), then enters port 6 of ten-way valve 1 (V1), exits port 5 of ten-way valve 1 (V1) and enters column 1 (43), then enters port 6 of six-way valve 2 (V2), exits port 1 of six-way valve 2 (V2) and enters column 2 (44), then enters port 2 of six-way valve 4 (V4), and exits port 3 of six-way valve 4 (V4) and enters plasma detector 1 (91) to detect SO2F2, S2F, COS, SOF2 and C3F8 components in the sample gas; S36. The six-way valve two (V2) is switched, and the carrier gas three (833) enters the port two of the six-way valve two (V2), exits through the port one of the six-way valve two (V2), and then enters the port two of the six-way valve four (V4) through the chromatographic column two (44), and then enters the plasma detector one (91) from the port three of the six-way valve four (V4) to flush the chromatographic column two (44) and the plasma detector one (91); S37. Carrier gas four (834) enters quantitative loop one (41) from port four of ten-way valve three (V3), then enters port ten of ten-way valve three (V3), then exits port nine of ten-way valve three (V3), enters column four (46), then enters port five of ten-way valve three (V3), then exits port six of ten-way valve three (V3), enters column five (47), then enters port six of six-way valve six (V6), then exits port one of six-way valve six (V6) and enters plasma detector two (92) to detect the O2, N2 and CO components in the gas; S38. Carrier gas five (835) enters port seven of ten-way valve three (V3) and then exits from port eight of ten-way valve three (V3); carrier gas six (836) enters port seven of ten-way valve five (V5) and then exits from port eight of ten-way valve five (V5). S39. The six-way valve six (V6) is switched, and the carrier gas seven (837) enters the port four of the ten-way valve five (V5), then exits from the port three of the ten-way valve five (V5) and enters the quantitative loop two (42), then enters the port ten of the ten-way valve five (V5), then exits from the port nine of the ten-way valve five (V5) and enters the column six (48), then enters the port five of the ten-way valve five (V5), then exits from the port six of the ten-way valve five (V5) and enters the column seven (49), then enters the port two of the six-way valve six (V6), and then exits from the port one of the six-way valve six (V6) and enters the plasma detector two (92) to detect the CF4, CO2 and C2F6 components in the injected gas.

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