Air component analysis system

Abstract

The utility model discloses an air component analysis system, which relates to the field of gas component detection and is characterized in that a first sample inlet, a first sampling device, a first sample outlet, a second sample inlet, a second sampling device and a second sample outlet are sequentially communicated to form a sample inlet gas path; the first carrier gas inlet, the first sampling device, the first switching valve, a first port of the first separation part, a second port of the first separation part and the first switching valve are sequentially communicated to form a first detection gas path; the second carrier gas inlet, a second port of the first separation part, a first port of the first separation part, the first switching valve, the second separation part and the first detection device are sequentially communicated to form a second detection gas path; and the third carrier gas inlet, the second sampling device, the second switching valve, the first port of the third separation part, the second port of the third separation part, the second switching valve, the fourth separation part and the second detection device are sequentially communicated to form a third detection gas path. The device can be used for detecting various components and is high in measurement precision.

Description

Technical Field

[0001] The utility model relates to the technical field of gas component detection, in particular to an air component analysis system. Background Art

[0002] Mine air contains toxic gases such as carbon monoxide (CO), sulfur dioxide (SO2), hydrogen sulfide (H2S), as well as harmful gases such as hydrogen (H2), nitrogen (N2), carbon dioxide (CO2), and methane. At present, the detection of component content in mine air is mostly carried out using gas sensors. For example, the use of carbon monoxide gas sensors to detect the carbon monoxide component content in mine air has problems such as low accuracy, single detection component, and mutual interference between components. Utility Model Content

[0003] The purpose of the utility model is to provide an air component analysis system to solve the problems existing in the prior art, which can detect multiple components, reduce or avoid mutual interference between components, and has high measurement accuracy.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides an air component analysis system, comprising: a first sampling device, a second sampling device, a first separation component, a second separation component, a third separation component, a fourth separation component, a first switching valve, a second switching valve, a first detection device and a second detection device, wherein:

[0006] The first switching valve has a first sampling port, a first sampling port, a first carrier gas inlet, a second carrier gas inlet, and a plurality of first working ports, wherein the first sampling port is used to be connected to a sample storage device, the first carrier gas inlet and the second carrier gas inlet are both connected to the carrier gas storage device, the two ports of the first sampling device, the two ports of the first separation component, and one port of the second separation component are all connected to one of the first working ports of the first switching valve, and the other port of the second separation component is connected to the first detection device; the first separation component and the second separation component are both capable of separating hydrogen sulfide and sulfur dioxide in the sample;

[0007] The second switching valve has a second sample inlet, a second sample outlet, a third carrier gas inlet, and a plurality of second working ports, the second sample inlet being connectable to the first sample outlet, the third carrier gas inlet being connected to the carrier gas storage device, two ports of the second sampling device, two ports of the third separation component, and one port of the fourth separation component being connected to one of the second working ports of the second switching valve, and another port of the fourth separation component being connected to a second detection device; the third separation component being capable of separating methane, acetylene, ethylene, ethane, propylene, and propane from the sample; and the fourth separation component being capable of separating the methane, acetylene, ethylene, and ethane from the sample;

[0008] The first sampling port, the first sampling device, the first sampling outlet, the second sampling port, the second sampling device and the second sampling outlet can be connected in sequence to form a sampling gas path; the first carrier gas inlet, the first sampling device, the first switching valve, the first port of the first separation component, the second port of the first separation component and the first switching valve can be connected in sequence to form a first detection gas path; the second carrier gas inlet, the second port of the first separation component, the first port of the first separation component, the first switching valve, the second separation component and the first detection device can be connected in sequence to form a second detection gas path; the third carrier gas inlet, the second sampling device, the second switching valve, the first port of the third separation component, the second port of the third separation component, the second switching valve, the fourth separation component and the second detection device can be connected in sequence to form a third detection gas path.

[0009] Preferably, the second switching valve has a fourth carrier gas inlet, which is used to connect to the carrier gas storage device; the fourth carrier gas inlet, the second port of the third separation component, the first port of the third separation component, the second switching valve and the second detection device can be connected in sequence to form a fourth detection gas path.

[0010] Preferably, it further comprises a third sampling device, a third switching valve, a fifth separation component, a sixth separation component and a third detection device, wherein the third switching valve has a third sampling port, a third sampling outlet, a fifth carrier gas inlet and a plurality of third working ports, the third sampling port is used to be connected to the sample storage device, the third sampling outlet can be connected to the first sampling port, the fifth carrier gas inlet can be connected to the carrier gas storage device, the two ports of the third sampling device, the two ports of the fifth separation component and one port of the sixth separation component are all connected to one of the third working ports of the third switching valve, and the other port of the sixth separation component is connected to the third detection device; the fifth separation component can separate the hydrogen, oxygen and nitrogen peak components in the sample, and the sixth separation component can separate the hydrogen, oxygen and nitrogen peak components into hydrogen, oxygen and nitrogen;

[0011] The third sampling port, the third sampling device, the third sampling outlet, the first sampling port, the first sampling device, the first sampling outlet, the second sampling port, the second sampling device and the second sampling outlet can be connected in sequence to form the sampling gas path; the fifth carrier gas inlet, the third sampling device, the third switching valve, the fifth separation component, the third switching valve, the sixth separation component and the third detection device can be connected in sequence to form the fifth detection gas path; the fifth carrier gas inlet, the sixth separation component and the third detection device can be connected in sequence to form the sixth detection gas path.

[0012] Preferably, the device further comprises a fourth switching valve, a fourth sampling device, a seventh separating component, an eighth separating component and a fourth detecting device, wherein the fourth switching valve has a fourth sampling port, a fourth sampling port, a sixth carrier gas inlet and a plurality of fourth working ports, the fourth sampling port is connected to the second sampling port, the fourth sampling port can be communicated with the external atmosphere, the sixth carrier gas inlet can be connected to the carrier gas storage device, two ports of the fourth sampling device, two ports of the seventh separating component and one port of the eighth separating component are all connected to one of the fourth working ports of the fourth switching valve, and another port of the eighth separating component is connected to the fourth detecting device; the seventh separating component and the eighth separating component are both capable of separating carbon monoxide and carbon dioxide in the sample;

[0013] The first sampling port, the first sampling device, the first sampling outlet, the second sampling port, the second sampling device, the second sampling outlet, the fourth sampling port, the fourth sampling device and the fourth sampling outlet can be connected in sequence to form the sampling gas path; the sixth carrier gas inlet, the fourth sampling device, the fourth switching valve, the first port of the seventh separation component, the second port of the seventh separation component, the fourth switching valve, the eighth separation component and the fourth detection device can be connected in sequence to form the seventh detection gas path; the sixth carrier gas inlet, the eighth separation component and the fourth detection device can be connected in sequence to form the eighth detection gas path.

[0014] Preferably, the first switching valve has a first gas outlet; the first carrier gas inlet and the first gas outlet of the first switching valve can be connected to form a first carrier gas loading gas path; the second carrier gas inlet, the first separation component, the first switching valve, the second separation component and the first detection device can be connected to form a second carrier gas loading gas path; the third carrier gas inlet, the fourth separation component and the second detection device can be connected to form a third carrier gas loading gas path.

[0015] Preferably, the fourth carrier gas inlet, the second port of the third separation component, the first port of the third separation component and the second detection device can be connected to form a fourth carrier gas loading gas path.

[0016] Preferably, the third switching valve has a seventh carrier gas inlet and a second gas outlet, and the seventh carrier gas inlet is used to be connected to the carrier gas storage device; the fourth switching valve has an eighth carrier gas inlet and a third gas outlet, and the eighth carrier gas inlet is used to be connected to the carrier gas storage device; the fifth carrier gas inlet, the sixth separation component and the third detection device can be connected to form a fifth carrier gas loading gas path; the sixth carrier gas inlet, the eighth separation component and the fourth detection device can be connected to form a sixth carrier gas loading gas path; the seventh carrier gas inlet, the fifth separation component and the second gas outlet of the third switching valve can be connected to form a seventh carrier gas loading gas path; the eighth carrier gas inlet, the second port of the seventh separation component, the first port of the seventh separation component and the third gas outlet of the fourth switching valve can be connected to form an eighth carrier gas loading gas path.

[0017] Preferably, the fourth detection device includes a detection body and a methane conversion device, and the air inlet port and the air outlet port of the methane conversion device are respectively connected to the air outlet port of the eighth separation component and the air inlet port of the detection body.

[0018] Preferably, the first detection device is a flame photometry detector, and the second detection device is a first flame ionization detector.

[0019] Preferably, the third detection device is a thermal conductivity detector, and the detection body is a second flame ionization detector.

[0020] Compared with the prior art, the utility model has achieved the following technical effects:

[0021] The utility model provides an air component analysis system, comprising a first sampling device, a second sampling device, a first separation component, a second separation component, a third separation component, a fourth separation component, a first switching valve, a second switching valve, a first detection device and a second detection device. The first separation component and the second separation component can both separate hydrogen sulfide and sulfur dioxide in a sample; the third separation component can separate methane, acetylene, ethylene, ethane, propylene and propane in a sample; the fourth separation component can separate methane, acetylene, ethylene and ethane in a sample; the first sampling port, the first sampling device, the first sampling port, the second sampling port, the second sampling device and the second sampling port can be connected in sequence. The first carrier gas inlet, the first sampling device, the first switching valve, the first port of the first separation component, the second port of the first separation component and the first switching valve can be connected in sequence to form a first detection gas path; the second carrier gas inlet, the second port of the first separation component, the first port of the first separation component, the first switching valve, the second separation component and the first detection device can be connected in sequence to form a second detection gas path; the third carrier gas inlet, the second sampling device, the second switching valve, the first port of the third separation component, the second port of the third separation component, the second sampling device, the fourth separation component and the second detection device can be connected in sequence to form a third detection gas path.

[0022] The above-mentioned air component analysis system separates hydrogen sulfide and sulfur dioxide in the sample through the first separation component and the second separation component; can separate methane, acetylene, ethylene, ethane, propylene and propane in the sample through the third separation component; can separate the methane, acetylene, ethylene and ethane in the sample through the fourth separation component; and can realize the detection of hydrogen sulfide and sulfur dioxide as well as methane, acetylene, ethylene, ethane, propylene and propane by switching the gas path through the first switching valve and the second switching valve; and because each component has undergone the separation effect of the corresponding chromatographic column before detection, it can reduce or avoid mutual interference between components and have high measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the state of sampling and carrier gas loading of the air component analysis system provided by the utility model;

[0025] Figure 2 A schematic diagram of the state of the air component analysis system provided by the utility model performing component detection;

[0026] In the figure: 100, air component analysis system; 1, sample pressure reducing valve; 2, sample storage device; 3, third sampling device; 4, third switching valve; 5, fifth separation component; 6, fifth carrier gas; 7, sixth separation component; 8, third detection device; 9, first flow control device; 10, seventh carrier gas; 11, first plane tee; 12, second plane tee; 13, first sampling device; 14, first switching valve; 15, first separation component; 16, first carrier gas; 17, second flow control device; 18, second carrier gas; 19, second separation component; 20, first detection device; 21, third plane tee; 22, second switching valve ; 23. Second sampling device; 24. Carrier gas pressure reducing valve; 25. Fourth plane tee; 26. Carrier gas storage device; 27. Third separation component; 28. Third carrier gas; 29. ​​Fourth carrier gas; 30. Fifth plane tee; 31. Sixth plane tee; 32. Fourth separation component; 33. Seventh plane tee; 34. Second detection device; 35. Seventh separation component; 36. Third flow control device; 37. Fourth switching valve; 38. Fourth sampling device; 39. Sample outlet; 40. Sixth carrier gas; 41. Eighth carrier gas; 42. Methane conversion device; 43. Eighth separation component; 44. Detection body; 45. Eighth plane tee. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The purpose of the utility model is to provide an air component analysis system to solve the problems existing in the prior art, which can detect multiple components, reduce or avoid mutual interference between components, and has high measurement accuracy.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0030] Explanation of professional terms:

[0031] The flat tee has three interfaces. If the gas source enters from the first interface, the gas source will flow out from the remaining two interfaces without external resistance.

[0032] The ten-way switching valve has ten interfaces, marked as 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. There are only two states: 1 is connected to 2, 3 is connected to 4, 5 is connected to 6, 7 is connected to 8, and 9 is connected to 10, or 2 is connected to 3, 4 is connected to 5, 6 is connected to 7, 8 is connected to 9, and 10 is connected to 1.

[0033] Example 1

[0034] like Figures 1-2As shown, this embodiment provides an air component analysis system 100, comprising: a first sampling device 13, a second sampling device 23, a first separation component 15, a second separation component 19, a third separation component 27, a fourth separation component 32, a first switching valve 14, a second switching valve 22, a first detection device 20 and a second detection device 34, wherein: the first switching valve 14 has a first sampling port, a first sampling port, a first carrier gas inlet, a second carrier gas inlet and a plurality of first working ports, the first sampling port is used to connect to the sample storage device 2, the first carrier gas inlet and the second carrier gas inlet are both connected to the carrier gas storage device 26, the first sampling device The two ports of the first separation component 13, the two ports of the first separation component 15 and one port of the second separation component 19 are all connected to a first working port of the first switching valve 14, and the other port of the second separation component 19 is connected to the first detection device 20; the first separation component 15 and the second separation component 19 are both capable of separating hydrogen sulfide and sulfur dioxide in the sample; the second switching valve 22 has a second sample inlet, a second sample outlet, a third carrier gas inlet and a plurality of second working ports, the second sample inlet can be connected to the first sample outlet, the third carrier gas inlet is connected to the carrier gas storage device 26, the two ports of the second sampling device 23, the two ports of the third separation component 27 and One port of the fourth separation component 32 is connected to a second working port of the second switching valve 22, and the other port of the fourth separation component 32 is connected to the second detection device 34; the third separation component 27 can separate methane, acetylene, ethylene, ethane, propylene and propane in the sample; the fourth separation component 32 can separate methane, acetylene, ethylene and ethane in the sample; the first injection port, the first sampling device 13, the first sampling port, the second injection port, the second sampling device 23 and the second sampling port can be connected in sequence to form an injection gas path; the first carrier gas inlet, the first sampling device 13, the first switching valve 14, the first separation component 15 and the second sampling device 23 ... The first port, the second port of the first separation component 15 and the first switching valve 14 can be connected in sequence to form a first detection gas path; the second carrier gas inlet, the second port of the first separation component 15, the first port of the first separation component 15, the first switching valve 14, the second separation component 19 and the first detection device 20 can be connected in sequence to form a second detection gas path; the third carrier gas inlet, the second sampling device 23, the second switching valve 22, the first port of the third separation component 27, the second port of the third separation component 27, the second switching valve 22, the fourth separation component 32 and the second detection device 34 can be connected in sequence to form a third detection gas path.

[0035] The above-mentioned air component analysis system 100 separates hydrogen sulfide and sulfur dioxide in the sample through the first separation component 15 and the second separation component 19; can separate methane, acetylene, ethylene, ethane, propylene and propane in the sample through the third separation component 27; can separate methane, acetylene, ethylene and ethane in the sample through the fourth separation component 32; and by switching the gas path through the first switching valve 14 and the second switching valve 22, it can realize the detection of hydrogen sulfide and sulfur dioxide as well as methane, acetylene, ethylene, ethane, propylene and propane. And because each component has undergone the separation effect of the corresponding chromatographic column before detection, it can reduce or avoid mutual interference between components, and the measurement accuracy is high.

[0036] In this embodiment, the second switching valve 22 has a fourth carrier gas inlet, which is used to connect to the carrier gas storage device 26; the fourth carrier gas inlet, the second port of the third separation component 27, the first port of the third separation component 27, the second switching valve 22 and the second detection device 34 can be connected in sequence to form a fourth detection gas path.

[0037] In this embodiment, the third sampling device 3, the third switching valve 4, the fifth separation component 5, the sixth separation component 7 and the third detection device 8 are further included. The third switching valve 4 has a third sample inlet, a third sample outlet, a fifth carrier gas inlet and multiple third working ports. The third sample inlet is used to connect with the sample storage device 2, the third sample outlet can be connected to the first sample inlet, the fifth carrier gas inlet can be connected to the carrier gas storage device 26, the two ports of the third sampling device 3, the two ports of the fifth separation component 5, and one port of the sixth separation component 7 are all connected to a third working port of the third switching valve 4, and the other port of the sixth separation component 7 is connected to the third detection device 8; the fifth separation component 5 can It can separate the hydrogen, oxygen and nitrogen peak components in the sample, and the sixth separation component 7 can separate the hydrogen, oxygen and nitrogen peak components into hydrogen, oxygen and nitrogen; the third injection port, the third sampling device 3, the third injection port, the first sampling device 13, the first injection port, the second injection port, the second sampling device 23 and the second injection port can be connected in sequence to form an injection gas path; the fifth carrier gas inlet, the third sampling device 3, the third switching valve 4, the fifth separation component 5, the third switching valve 4, the sixth separation component 7 and the third detection device 8 can be connected in sequence to form a fifth detection gas path; the fifth carrier gas inlet, the sixth separation component 7 and the third detection device 8 can be connected in sequence to form a sixth detection gas path.

[0038] In this embodiment, the fourth switching valve 37, the fourth sampling device 38, the seventh separating component 35, the eighth separating component 43 and the fourth detecting device are further included. The fourth switching valve 37 has a fourth sample inlet, a fourth sample outlet, a sixth carrier gas inlet and a plurality of fourth working ports. The fourth sample inlet is connected to the second sample outlet, the fourth sample outlet can be communicated with the external atmosphere, the sixth carrier gas inlet can be connected to the carrier gas storage device 26, the two ports of the fourth sampling device 38, the two ports of the seventh separating component 35, and one port of the eighth separating component 43 are all connected to a fourth working port of the fourth switching valve 37, and the other port of the eighth separating component 43 is connected to the fourth detecting device; the seventh separating component 35 and the eighth separating component 43 are connected to the fourth working port of the fourth switching valve 37. The separation components 43 can all separate carbon monoxide and carbon dioxide in the sample; the first sampling port, the first sampling device 13, the first sampling outlet, the second sampling port, the second sampling device 23, the second sampling outlet, the fourth sampling port, the fourth sampling device 38 and the fourth sampling outlet can be connected in sequence to form an injection gas path; the sixth carrier gas inlet, the fourth sampling device 38, the fourth switching valve 37, the first port of the seventh separation component 35, the second port of the seventh separation component 35, the fourth switching valve 37, the eighth separation component 43 and the fourth detection device can be connected in sequence to form a seventh detection gas path; the sixth carrier gas inlet, the eighth separation component 43 and the fourth detection device can be connected in sequence to form an eighth detection gas path.

[0039] In this embodiment, the fourth detection device includes a detection body 44 and a methane conversion device 42 , and the air inlet and air outlet of the methane conversion device 42 are connected to the air outlet of the eighth separation component 43 and the air inlet of the detection body 44 respectively.

[0040] In this embodiment, the first switching valve 14 has a first gas outlet, and the first carrier gas inlet and the first gas outlet can be connected to form a first carrier gas loading gas path; the second carrier gas inlet, the first separation component 15, the first switching valve 14, the second separation component 19 and the first detection device 20 can be connected to form a second carrier gas loading gas path; the third carrier gas inlet, the fourth separation component 32 and the second detection device 34 can be connected to form a third carrier gas loading gas path; the fourth carrier gas inlet, the second port of the third separation component 27, the first port of the third separation component 27 and the second detection device 34 can be connected to form a fourth carrier gas loading gas path.

[0041] In this embodiment, the third switching valve 4 has a seventh carrier gas inlet and a second gas outlet, and the seventh carrier gas inlet is used to connect to the carrier gas storage device 26; the fourth switching valve 37 has an eighth carrier gas inlet and a third gas outlet, and the eighth carrier gas inlet is used to connect to the carrier gas storage device 26; the fifth carrier gas inlet, the sixth separation component 7 and the third detection device 8 can be connected to form a fifth carrier gas loading gas path; the sixth carrier gas inlet, the eighth separation component 43 and the fourth detection device can be connected to form a sixth carrier gas loading gas path; the seventh carrier gas inlet, the fifth separation component 5, and the second gas outlet of the third switching valve 4 can be connected to form a seventh carrier gas loading gas path; the eighth carrier gas inlet, the second port of the seventh separation component 35, the first port of the seventh separation component 35, and the third gas outlet of the fourth switching valve 37 can be connected to form an eighth carrier gas loading gas path.

[0042] In this embodiment, the present invention further includes a first flow control device 9, a second flow control device 17, and a third flow control device 36. The first flow control device 9, the second flow control device 17, and the third flow control device 36 are connected to the second gas outlet, the first gas outlet, and the third gas outlet, respectively. The eighth carrier gas inlet, the second port of the seventh separation component 35, the first port of the seventh separation component 35, the third gas outlet of the fourth switching valve 37, and the third flow control device 36 are interconnected to form an exhaust gas path. Component peaks other than carbon monoxide and carbon dioxide in the seventh separation component 35 are backflushed by the eighth carrier gas 41 through the third flow control device 36 and discharged.

[0043] In this embodiment, a sample storage device 2 and a carrier gas storage device 26 are further included. The sample storage device 2 is connected to the third sample inlet, and the carrier gas storage device 26 is connected to the first to eighth carrier gas inlets.

[0044] In this embodiment, the first detection device 20 is a flame photometry detector, and the second detection device 34 is a first flame ionization detector.

[0045] In this embodiment, the third detection device 8 is a thermal conductivity detector.

[0046] In this embodiment, the detection body 44 is a second flame ionization detector.

[0047] In this embodiment, the first separation component 15, the second separation component 19, the third separation component 27, the fourth separation component 32, the fifth separation component 5, the sixth separation component 7, the seventh separation component 35, and the eighth separation component 43 are all chromatographic columns. The fifth separation component 5 is filled with a Porapak Q chromatographic support or other equivalent chromatographic support. The sixth separation component 7 is filled with a molecular sieve chromatographic support or other equivalent chromatographic support. The first separation component 15 and the second separation component 19 are filled with a Porapak QS chromatographic support or other equivalent chromatographic support. The third separation component 27 and the fourth separation component 32 are filled with a GDX-102 chromatographic support or other equivalent chromatographic support. The seventh separation component 35 and the eighth separation component 43 are filled with a GDX-502 chromatographic support or other equivalent chromatographic support.

[0048] In this embodiment, the first sampling device 13, the second sampling device 23, the third sampling device 3, and the fourth sampling device 38 are all quantitative loops.

[0049] Example 2

[0050] This embodiment provides an air component analysis method based on the air component analysis system 100 of embodiment 1, including the following steps:

[0051] S1. Sampling a sample, wherein the sampling method includes: passing the sample through the first sampling port, the first sampling device 13, the first sampling port, the second sampling port, the second sampling device 23, and the second sampling port in sequence, and quantitatively storing the sample through the first sampling device 13 and the second sampling device 23 respectively;

[0052] S2. Detect gas components. The detection methods include:

[0053] Detection of hydrogen sulfide and sulfur dioxide components: the carrier gas enters the first sampling device 13 through the first carrier gas inlet, and the carrier gas carries the sample from the first sampling device 13 through the first switching valve 14, the first port of the first separation component 15, the second port of the first separation component 15, and the first switching valve 14 in sequence, and is discharged from the first switching valve 14. The hydrogen sulfide and sulfur dioxide in the sample are separated by the first separation component 15. When hydrogen sulfide is separated from the first separation component 15, the carrier gas stops entering the first detection gas path, and the carrier gas passes through the second carrier gas inlet, the second port of the first separation component 15, and the first port of the first separation component 15 in sequence to backflush the first separation component 15. The carrier gas carries the hydrogen sulfide and sulfur dioxide in the first separation component 15 through the first switching valve 14, the second separation component 19, and the first detection device 20 in sequence. The hydrogen sulfide and sulfur dioxide are separated again by the second separation component 19, and the hydrogen sulfide and sulfur dioxide in the sample are detected by the first detection device 20.

[0054] Perform methane, acetylene, ethylene, and ethane component detection: allow the carrier gas to enter the second sampling device 23 through the third carrier gas inlet, and the sample of the second sampling device 23 is carried by the carrier gas through the second switching valve 22, the first port of the third separation component 27, the second port of the third separation component 27, the second switching valve 22, the fourth separation component 32, and the second detection device 34 in sequence. Methane, acetylene, ethylene, and ethane are separated by the third separation component 27, and methane, acetylene, ethylene, and ethane are separated again by the fourth separation component 32. The methane, acetylene, ethylene, and ethane in the sample are detected by the second detection device 34.

[0055] In this embodiment, the second switching valve 22 has a fourth carrier gas inlet, which is used to connect to the carrier gas storage device 26;

[0056] S2 also includes: performing propylene and propane component detection: when the ethane in the third separation component 27 is completely carried by the carrier gas into the fourth separation component 32, the carrier gas is allowed to flow through the fourth carrier gas inlet, the second port of the third separation component 27 and the first port of the third separation component 27 in sequence to backflush the third separation component 27, and the propylene and propane in the third separation component 27 are carried by the carrier gas through the second switching valve 22 into the second detection device 34, and the propylene and propane in the sample are detected by the second detection device 34.

[0057] In this embodiment, the third sampling device 3, the third switching valve 4, the fifth separation component 5, the sixth separation component 7 and the third detection device 8 are further included. The third switching valve 4 has a third sampling port, a third sampling outlet, a fifth carrier gas inlet and a plurality of third working ports. The third sampling port is used to connect to the sample storage device 2, the third sampling outlet can be connected to the first sampling port, and the fifth carrier gas inlet can be connected to the carrier gas storage device 26. The two ports of the third sampling device 3, the two ports of the fifth separation component 5, and one port of the sixth separation component 7 are all connected to one third working port of the third switching valve 4, and the other port of the sixth separation component 7 is connected to the third detection device 8.

[0058] S1 includes: a sampling method including: allowing the sample to flow through the third sampling port, the third sampling device 3, the third sampling port, the first sampling port, the first sampling device 13, the first sampling port, the second sampling port, the second sampling device 23 and the second sampling port in sequence, and quantitatively storing the sample through the third sampling device 3;

[0059] S2 also includes: performing hydrogen, oxygen and nitrogen component detection: allowing the carrier gas to enter the third sampling device 3 through the fifth carrier gas inlet, and the carrier gas carries the sample in the third sampling device 3 to flow through the third switching valve 4, the fifth separation component 5, the third switching valve 4, the sixth separation component 7 and the third detection device 8 in sequence, and the hydrogen, oxygen and nitrogen peak components in the sample are separated by the fifth separation component 5; when the hydrogen, oxygen and nitrogen peak components completely enter the sixth separation component 7, the carrier gas is allowed to flow through the fifth carrier gas inlet, the sixth separation component 7 and the third detection device 8 in sequence, and the hydrogen, oxygen and nitrogen peak components are separated into hydrogen, oxygen and nitrogen by the sixth separation component 7, and the hydrogen, oxygen and nitrogen in the sample are detected by the third detection device 8.

[0060] In this embodiment, the fourth switching valve 37, the fourth sampling device 38, the seventh separating component 35, the eighth separating component 43 and the fourth detecting device are further included. The fourth switching valve 37 has a fourth sample inlet, a fourth sample outlet, a sixth carrier gas inlet and a plurality of fourth working ports. The fourth sample inlet is connected to the second sample outlet, the fourth sample outlet can be communicated with the external atmosphere, the sixth carrier gas inlet can be connected to the carrier gas storage device 26, the two ports of the fourth sampling device 38, the two ports of the seventh separating component 35, and one port of the eighth separating component 43 are all connected to one fourth working port of the fourth switching valve 37, and the other port of the eighth separating component 43 is connected to the fourth detecting device.

[0061] S1 includes: a sampling method including: a first sampling port, a first sampling device 13, a first sampling outlet, a second sampling port, a second sampling device 23, a second sampling outlet, a fourth sampling port, a fourth sampling device 38, and a fourth sampling outlet, wherein a sample is quantitatively stored through the fourth sampling device 38;

[0062] S2 also includes: performing carbon monoxide and carbon dioxide component detection: allowing the carrier gas to enter the fourth sampling device 38 through the sixth carrier gas inlet, and the carrier gas carries the sample in the fourth sampling device 38 to flow through the fourth switching valve 37, the first port of the seventh separation component 35, the second port of the seventh separation component 35, the fourth switching valve 37, the eighth separation component 43 and the fourth detection device in sequence, and the carbon monoxide and carbon dioxide in the sample are separated by the seventh separation component 35; when the carbon dioxide completely flows from the seventh separation component 35 to the eighth separation component 43, the carrier gas is allowed to flow through the sixth carrier gas inlet, the eighth separation component 43 and the fourth detection device in sequence, and the carbon monoxide and carbon dioxide in the sample are separated again by the eighth separation component 43, and the carbon monoxide and carbon dioxide in the sample are detected by the fourth detection device.

[0063] In this embodiment, the first switching valve 14 has a first gas outlet; the third switching valve 4 has a seventh carrier gas inlet and a second gas outlet, and the seventh carrier gas inlet is used to connect to the carrier gas storage device 26; the fourth switching valve 37 has an eighth carrier gas inlet and a third gas outlet, and the eighth carrier gas inlet is used to connect to the carrier gas storage device 26;

[0064] Before performing gas component detection, carrier gas loading is performed, and the carrier gas loading method includes: allowing the carrier gas to flow through the first carrier gas inlet and the first gas outlet of the first switching valve 14 in sequence; allowing the carrier gas to flow through the second carrier gas inlet, the first separation component 15, the first switching valve 14, the second separation component 19 and the first detection device 20 in sequence; allowing the carrier gas to flow through the third carrier gas inlet, the fourth separation component 32 and the second detection device 34 in sequence; allowing the carrier gas to flow through the fourth carrier gas inlet, the second port of the third separation component 27, the first port of the third separation component 27 and the second detection device 34 in sequence; allowing the carrier gas to flow through the fifth carrier gas inlet, the sixth separation component 7 and the third detection device 8 in sequence; allowing the carrier gas to flow through the sixth carrier gas inlet, the eighth separation component 43 and the fourth detection device in sequence; allowing the carrier gas to flow through the seventh carrier gas inlet, the fifth separation component 5, the second gas outlet of the third switching valve 4 in sequence; allowing the carrier gas to flow through the eighth carrier gas inlet, the second port of the seventh separation component 35, the first port of the seventh separation component 35 and the third gas outlet of the fourth switching valve 37 in sequence.

[0065] This embodiment can determine the content of hydrogen, oxygen, nitrogen, methane, acetylene, ethylene, ethane, propylene, propane, carbon monoxide, and carbon dioxide components in mine air through a single sampling, with qualitative and quantitative measurements and accurate measurement.

[0066] In this embodiment, the first plane tee 11, the second plane tee 12, the third plane tee 21, the fourth plane tee 25, the fifth plane tee 30, the sixth plane tee 31, the seventh plane tee 33, the eighth plane tee 45, the sample pressure reducing valve 1, the carrier gas pressure reducing valve 24, the first switching valve 14, the second switching valve 22, the third switching valve 4 and the fourth switching valve 37 are all ten-way switching valves. The connection relationship between each plane tee, each ten-way switching valve and each component is as follows: Figure 1 As shown, correspondingly, the specific methods of the air component analysis method include:

[0067] 1. Sample collection

[0068] After the sample flows out of the sample storage device 2, it is reduced in pressure through the sample pressure reducing valve 1, and then flows through ports 1 and 10 of the third switching valve 4 → the third sampling device 3 → ports 3 and 2 of the third switching valve 4 → ports 1 and 10 of the first switching valve 14 → the first sampling device 13 → ports 3 and 2 of the first switching valve 14 → ports 1 and 10 of the second switching valve 22 → the second sampling device 23 → ports 3 and 2 of the second switching valve 22 → ports 1 and 10 of the fourth switching valve 37 → the fourth sampling device 38 → ports 3 and 2 of the fourth switching valve 37, and is finally discharged from port 2 of the fourth switching valve 37 through the sample outlet 39.

[0069] 2. Carrier Gas Loading

[0070] After the carrier gas flows out of the carrier gas storage device 26, it is reduced in pressure through the carrier gas pressure reducing valve 24 and flows to the fourth plane tee 25, flows out from an interface of the fourth plane tee 25, flows to the first plane tee 11, and flows out from an interface of the first plane tee 11 as the seventh carrier gas 10 → ports 7 and 6 of the third switching valve 4 → the fifth separation component 5 → ports 9 and 8 of the third switching valve 4 → the first flow control device 9.

[0071] After the carrier gas flows out from another interface of the first plane tee 11, it flows to the second plane tee 12, and flows out from one interface of the second plane tee 12 as the fifth carrier gas 6 → port 4 and port 5 of the third switching valve 4 → the sixth separation component 7 → the third detection device 8.

[0072] After the carrier gas flows out from the other interface of the second plane tee 12, it flows to the third plane tee 21, and flows out from one interface of the third plane tee 21 as the first carrier gas 16 → port 4 and port 5 of the first switching valve 14 → the second flow control device 17.

[0073] The carrier gas flows out from another interface of the third plane tee 21 as the second carrier gas 18 → ports 7 and 6 of the first switching valve 14 → the first separation component 15 → ports 9 and 8 of the first switching valve 14 → the second separation component 19 → the first detection device 20 .

[0074] It flows out from another interface of the fourth plane tee 25 to the fifth plane tee 30, and flows out from one interface of the fifth plane tee 30 as the fourth carrier gas 29 → ports 7 and 6 of the second switching valve 22 → the third separation component 27 → ports 9 and 8 of the second switching valve 22 → the seventh plane tee 33 → the second detection device 34.

[0075] It flows out from another interface of the fifth plane tee 30 to the sixth plane tee 31, and flows out from one interface of the sixth plane tee 31 as the third carrier gas 28 → ports 4 and 5 of the second switching valve 22 → the fourth separation component 32 → the seventh plane tee 33 → the second detection device 34.

[0076] It flows out from another interface of the sixth plane tee 31 to the eighth plane tee 45, and flows out from one interface of the eighth plane tee 45 as the eighth carrier gas 41 → ports 7 and 6 of the fourth switching valve 37 → the seventh separation component 35 → ports 9 and 8 of the fourth switching valve 37 → the third flow control device 36.

[0077] The sixth carrier gas 40 flows out from the other interface of the eighth planar tee 45 → ports 4 and 5 of the fourth switching valve 37 → the eighth separation component 43 → the fourth detection device.

[0078] Third, gas component detection:

[0079] Analysis and detection of hydrogen, oxygen and nitrogen components: Figure 2 As shown, the fifth carrier gas 6 → ports 4 and 3 of the third switching valve 4 → the third sampling device 3, carrying the sample in the third sampling device 3 → ports 10 and 9 of the third switching valve 4 → the fifth separation component 5, the fifth separation component 5 pre-separates the sample from the hydrogen, oxygen, and nitrogen peak and the component peaks other than hydrogen, oxygen, and nitrogen. When the hydrogen, oxygen, and nitrogen peak completely enters the sixth separation component 7 through ports 6 and 5 of the third switching valve 4, the third switching valve 4 is reset to Figure 1 In this state, the fifth carrier gas 6 → ports 4 and 5 of the third switching valve 4 → the sixth separation component 7 further separates the hydrogen, oxygen and nitrogen peak into hydrogen (H2), oxygen (O2) and nitrogen (N2) components → detected by the third detection device 8; the component peaks other than hydrogen, oxygen and nitrogen in the fifth separation component 5 are backflushed by the seventh carrier gas 10 and discharged through the first flow control device 9 (seventh carrier gas 10 → ports 7 and 6 of the third switching valve 4 → the fifth separation component 5 → ports 9 and 8 of the third switching valve 4 → the first flow control device 9).

[0080] Analysis and detection of hydrogen sulfide and sulfur dioxide components: Figure 2 As shown, the first carrier gas 16 → port No. 4 and port No. 3 of the first switching valve 14 → the first sampling device 13, the first carrier gas 16 carries the sample in the first sampling device 13 → port No. 10 and port No. 9 of the first switching valve 14 → the first separation component 15, the first separation component 15 discharges the previously separated components of hydrogen sulfide and sulfur dioxide → port No. 6 and port No. 5 of the first switching valve 14 → through the second flow control device 17.

[0081] When hydrogen sulfide is separated from the first separation element 15, the first switching valve 14 is reset to Figure 1In this state, the second carrier gas 18 back-blows the hydrogen sulfide and sulfur dioxide in the first separation component 15 into the second separation component 19. The second separation component 19 further separates the hydrogen sulfide and sulfur dioxide, and the results are detected by the first detection device 20 (the path is: second carrier gas 18 → ports 7 and 6 of the first switching valve 14 → first separation component 15 → ports 9 and 8 of the first switching valve 14 → second separation component 19 → first detection device 20).

[0082] Analysis and detection of alkanes: Figure 2 As shown, the third carrier gas 28 → ports 4 and 3 of the second switching valve 22 → the second sampling device 23, the third carrier gas 28 carries the sample in the second sampling device 23 → ports 10 and 9 of the second switching valve 22 → the third separation component 27, the third carrier gas 28 carries the methane, acetylene, ethylene, and ethane first separated by the third separation component 27 to the fourth separation component 32 through ports 6 and 5 of the second switching valve 22, the fourth separation component 32 further separates the above components → the second detection device 34, detects the methane (CH4), acetylene (C2H2), ethylene (C2H4), and ethane (C2H6) components; when ethane completely enters the fourth separation component 32 from the third separation component 27, the second switching valve 22 is reset to Figure 1 In this state, the fourth carrier gas 29 back-blows the propylene (C3H6) and propane (C3H8) components retained in the third separation component 27, which are detected by the second detection device 34 (the path is: fourth carrier gas 29 → ports 7 and 6 of the second switching valve 22 → third separation component 27 → ports 9 and 8 of the second switching valve 22 → seventh plane tee 33 → second detection device 34).

[0083] Analysis of carbon monoxide and carbon dioxide components: Figure 2 As shown, the sixth carrier gas 40 → ports 4 and 3 of the fourth switching valve 37 → the fourth sampling device 38, the sixth carrier gas 40 carries the sample in the fourth sampling device 38 → ports 10 and 9 of the fourth switching valve 37 → the seventh separation component 35, the seventh separation component 35 first separates the sample into carbon monoxide and carbon dioxide, and when the carbon dioxide component completely flows from the seventh separation component 35 to the eighth separation component 43, the fourth switching valve 37 is reset to Figure 1In this state, the sixth carrier gas 40 is directed from ports 4 and 5 of the fourth switching valve 37 to the eighth separation element 43. The sixth carrier gas 40 carries the carbon monoxide and carbon dioxide components, which are further separated by the eighth separation element 43, into the methane conversion unit 42. The methane conversion unit 42 converts the carbon monoxide and carbon dioxide into methane. The gas is directed from the detection unit 44, where the carbon monoxide and carbon dioxide contents are measured. The eighth carrier gas 41 backflushes the components in the seventh separation element 35 and is discharged through the third flow control device 36 (eighth carrier gas 41 is directed from ports 7 and 6 of the fourth switching valve 37 to the seventh separation element 35, ports 9 and 8 of the fourth switching valve 37, and the third flow control device 36).

[0084] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An air composition analysis system, characterized in that: include: A first sampling device, a second sampling device, a first separating component, a second separating component, a third separating component, a fourth separating component, a first switching valve, a second switching valve, a first detecting device and a second detecting device, wherein: The first switching valve has a first sampling port, a first sampling port, a first carrier gas inlet, a second carrier gas inlet, and a plurality of first working ports, wherein the first sampling port is used to be connected to a sample storage device, the first carrier gas inlet and the second carrier gas inlet are both connected to the carrier gas storage device, the two ports of the first sampling device, the two ports of the first separation component, and one port of the second separation component are all connected to one of the first working ports of the first switching valve, and the other port of the second separation component is connected to the first detection device; the first separation component and the second separation component are both capable of separating hydrogen sulfide and sulfur dioxide in the sample; The second switching valve has a second sample inlet, a second sample outlet, a third carrier gas inlet, and a plurality of second working ports, the second sample inlet being connectable to the first sample outlet, the third carrier gas inlet being connected to the carrier gas storage device, two ports of the second sampling device, two ports of the third separation component, and one port of the fourth separation component being connected to one of the second working ports of the second switching valve, and another port of the fourth separation component being connected to a second detection device; the third separation component being capable of separating methane, acetylene, ethylene, ethane, propylene, and propane from the sample; and the fourth separation component being capable of separating the methane, acetylene, ethylene, and ethane from the sample; The first sampling port, the first sampling device, the first sampling outlet, the second sampling port, the second sampling device and the second sampling outlet can be connected in sequence to form a sampling gas path; the first carrier gas inlet, the first sampling device, the first switching valve, the first port of the first separation component, the second port of the first separation component and the first switching valve can be connected in sequence to form a first detection gas path; the second carrier gas inlet, the second port of the first separation component, the first port of the first separation component, the first switching valve, the second separation component and the first detection device can be connected in sequence to form a second detection gas path; the third carrier gas inlet, the second sampling device, the second switching valve, the first port of the third separation component, the second port of the third separation component, the second switching valve, the fourth separation component and the second detection device can be connected in sequence to form a third detection gas path.

2. The air composition analysis system according to claim 1, characterized in that: The second switching valve has a fourth carrier gas inlet, which is used to connect to the carrier gas storage device; the fourth carrier gas inlet, the second port of the third separation component, the first port of the third separation component, the second switching valve and the second detection device can be connected in sequence to form a fourth detection gas path.

3. The air composition analysis system according to claim 1, characterized in that: It also includes a third sampling device, a third switching valve, a fifth separation component, a sixth separation component and a third detection device, the third switching valve has a third sampling port, a third sampling outlet, a fifth carrier gas inlet and multiple third working ports, the third sampling port is used to connect with the sample storage device, the third sampling outlet can be connected with the first sampling port, the fifth carrier gas inlet can be connected with the carrier gas storage device, two ports of the third sampling device, two ports of the fifth separation component, and one port of the sixth separation component are all connected to one of the third working ports of the third switching valve, and the other port of the sixth separation component is connected to the third detection device; the fifth separation component can separate the hydrogen, oxygen, and nitrogen peak components in the sample, and the sixth separation component can separate the hydrogen, oxygen, and nitrogen peak components into hydrogen, oxygen, and nitrogen; The third sampling port, the third sampling device, the third sampling outlet, the first sampling port, the first sampling device, the first sampling outlet, the second sampling port, the second sampling device and the second sampling outlet can be connected in sequence to form the sampling gas path; the fifth carrier gas inlet, the third sampling device, the third switching valve, the fifth separation component, the third switching valve, the sixth separation component and the third detection device can be connected in sequence to form the fifth detection gas path; the fifth carrier gas inlet, the sixth separation component and the third detection device can be connected in sequence to form the sixth detection gas path.

4. The air composition analysis system according to claim 3, characterized in that: The invention also includes a fourth switching valve, a fourth sampling device, a seventh separation component, an eighth separation component and a fourth detection device, wherein the fourth switching valve has a fourth sample inlet, a fourth sample outlet, a sixth carrier gas inlet and a plurality of fourth working ports, the fourth sample inlet is connected to the second sample outlet, the fourth sample outlet can be communicated with the external atmosphere, the sixth carrier gas inlet can be connected to the carrier gas storage device, two ports of the fourth sampling device, two ports of the seventh separation component and one port of the eighth separation component are all connected to one of the fourth working ports of the fourth switching valve, and another port of the eighth separation component is connected to the fourth detection device; the seventh separation component and the eighth separation component are both capable of separating carbon monoxide and carbon dioxide in the sample; The first sampling port, the first sampling device, the first sampling outlet, the second sampling port, the second sampling device, the second sampling outlet, the fourth sampling port, the fourth sampling device and the fourth sampling outlet can be connected in sequence to form the sampling gas path; the sixth carrier gas inlet, the fourth sampling device, the fourth switching valve, the first port of the seventh separation component, the second port of the seventh separation component, the fourth switching valve, the eighth separation component and the fourth detection device can be connected in sequence to form the seventh detection gas path; the sixth carrier gas inlet, the eighth separation component and the fourth detection device can be connected in sequence to form the eighth detection gas path.

5. The air composition analysis system according to claim 1, characterized in that: The first switching valve has a first gas outlet; the first carrier gas inlet and the first gas outlet of the first switching valve can be connected to form a first carrier gas loading gas path; The second carrier gas inlet, the first separation component, the first switching valve, the second separation component and the first detection device are capable of communicating to form a second carrier gas loading gas path; The third carrier gas inlet, the fourth separation component and the second detection device can be communicated to form a third carrier gas loading gas path.

6. The air composition analysis system according to claim 2, characterized in that: The fourth carrier gas inlet, the second port of the third separation component, the first port of the third separation component and the second detection device can be communicated to form a fourth carrier gas loading path.

7. The air composition analysis system according to claim 4, characterized in that: The third switching valve has a seventh carrier gas inlet and a second gas outlet, and the seventh carrier gas inlet is used to connect to the carrier gas storage device; the fourth switching valve has an eighth carrier gas inlet and a third gas outlet, and the eighth carrier gas inlet is used to connect to the carrier gas storage device; the fifth carrier gas inlet, the sixth separation component and the third detection device are capable of communicating and forming a fifth carrier gas loading gas path; The sixth carrier gas inlet, the eighth separation component and the fourth detection device can be connected to form a sixth carrier gas loading gas path; the seventh carrier gas inlet, the fifth separation component and the second gas outlet of the third switching valve can be connected to form a seventh carrier gas loading gas path; The eighth carrier gas inlet, the second port of the seventh separation component, the first port of the seventh separation component, and the third gas outlet of the fourth switching valve can be communicated to form an eighth carrier gas loading gas path.

8. The air composition analysis system according to claim 4, characterized in that: The fourth detection device includes a detection body and a methane conversion device, and the air inlet port and the air outlet port of the methane conversion device are respectively connected to the air outlet port of the eighth separation component and the air inlet port of the detection body.

9. The air composition analysis system according to claim 1, characterized in that: The first detection device is a flame photometric detector, and the second detection device is a first flame ionization detector.

10. The air composition analysis system according to claim 8, characterized in that: The third detection device is a thermal conductivity detector, and the detection body is a second flame ionization detector.

Images