Flame photometric detector and detection method

Abstract

The invention provides a flame photometric detector and a detection method.The flame photometric detector comprises an air inlet base, a detection chamber, a flow control unit, an ignition exhaust unit and an optical detection unit, and the flow control unit comprises a first flow control assembly, a second flow control assembly and a third flow control assembly; the control unit is used for controlling the hydrogen flow, the carrier gas flow carrying a to-be-detected object and the air flow respectively, the ignition and exhaust unit is used for igniting mixed gas of hydrogen and air and discharging a combusted product, and the optical detection unit is used for detecting components and content of the to-be-detected object; the first flow control assembly, the second flow control assembly and the third flow control assembly are arranged to control the flow of hydrogen, carrier gas and air entering the detection chamber respectively, so that airflow in the detection chamber is stable, combustion flames are kept stable, and the detection efficiency is improved. The problems that the flame luminosity is not within the detection range of the optical detection unit and the flame jumps due to unstable gas flow are avoided, and the detection result is more accurate.

Description

Technical Field

[0001] The present application relates to the technical field of gas chromatography detectors, and in particular to a flame photometric detector and a detection method. Background Art

[0002] Gas chromatograph is an instrument that uses gas chromatography to analyze substances, including an injection system, a chromatographic column, a detector, and a data processing system. The injection system is used to gasify the analyte, the chromatographic column is used to separate the analyte, and the detector is used to detect the components of the analyte and measure its concentration. It is the most important part of the gas chromatograph. Commonly used detectors include ECD (Electron Capture Detector), FID (Flame Ionization Detector), FPD (Flame Photometric Detector), and TCD (Thermal Conductivity Detector). Among them, the flame photometric detector has the characteristics of good selectivity and high sensitivity, and is often used for the detection of sulfur and phosphorus compounds.

[0003] The basic structure of the flame photometer mainly includes two parts: flame maintenance and optical detection. The flame maintenance part includes hydrogen and air flow paths, nozzles, combustion chambers and exhaust holes. After ignition, a non-premixed hydrogen diffusion flame is formed at the nozzle, and the combustion products flow out through the exhaust hole. The optical detection part includes a filter and a light detector. The light detectors in the flame photometer all use photomultiplier tubes for photoelectric detection. Therefore, the main factors affecting the detection accuracy of the flame photometer are flame maintenance and optical detection. The flow ratio of hydrogen, air and carrier gas carrying the test object will affect the stability of flame combustion. If the flow ratio of the three is unstable, it will affect the height of the flame, causing the flame to exceed or fall below the window range of the photomultiplier tube; secondly, it will cause the flame to be unstable, produce jumps or affect the flame shape, affecting the detection results. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present application provides a flame photometer and a detection method to solve the technical problem that the flow ratio of hydrogen, air and carrier gas carrying the detection object in the above-mentioned flame photometer is unstable, thereby affecting the detection result.

[0005] The present application provides a flame photometer, which comprises: an air inlet base; a detection chamber, which is arranged on the air inlet base and communicated with the air inlet base; a flow control unit, which comprises a first flow control component, a second flow control component and a third flow control component; the first flow control component, the second flow control component and the third flow control component all have an air inlet end and an air outlet end, the air inlet end of the first flow control component is connected to hydrogen, the air inlet end of the second flow control component is connected to a carrier gas carrying an object to be detected, the air inlet end of the third flow control component is connected to air, and the first flow control component The outlet ends of the component, the second flow control component and the third flow control component are respectively connected to the air inlet base; the first flow control component is used to control the hydrogen flow, the second flow control component is used to control the carrier gas flow carrying the object to be tested, and the third flow control component is used to control the air flow; an ignition and exhaust unit is arranged on the detection chamber and connected to the detection chamber; the ignition and exhaust unit is used to ignite the mixture of hydrogen and air and discharge the combustion products; an optical detection unit is arranged on the detection chamber and connected to the detection chamber; the optical detection unit is used to detect the composition and content of the object to be tested.

[0006] In one embodiment of the present application, the first flow control component, the second flow control component and the third flow control component are evenly distributed along the circumference of the outer side wall of the air intake base.

[0007] In one embodiment of the present application, the first flow control component, the second flow control component and the third flow control component all include a pressure sensor, an air circuit valve block, a regulating valve, an air inlet adapter and an air outlet adapter, and the pressure sensor, the regulating valve, the air inlet adapter and the air outlet adapter are all arranged on the air circuit valve block and are respectively connected to the air circuit valve block.

[0008] In one embodiment of the present application, the optical detection units are provided in two groups and are arranged circumferentially along the outer wall of the detection chamber.

[0009] In one embodiment of the present application, the two groups of optical detection units are perpendicular to each other in the horizontal direction.

[0010] In one embodiment of the present application, the optical detection unit includes a photomultiplier tube, a filter and a lighting bracket, the photomultiplier tube is arranged on the lighting bracket, and the filter is coated on the outer wall of the photomultiplier tube and is arranged between the photomultiplier tube and the lighting bracket.

[0011] In one embodiment of the present application, a matte quartz cover and an adjustment ring are provided in the detection chamber.

[0012] In one embodiment of the present application, the detection chamber is arranged on the air intake base through a support, a nozzle is arranged in the support, the nozzle connects the detection chamber and the air intake base, and a rectifier is arranged between the air intake base and the support.

[0013] In one embodiment of the present application, the air inlet base has a nozzle interface, and the air inlet base is connected to the nozzle through the nozzle interface.

[0014] In one embodiment of the present application, a flame photometry detection method is also provided, using the flame photometry detector as described above, the method comprising: introducing hydrogen into the detection chamber through a first flow control component and controlling the hydrogen flow, introducing air into the detection chamber through a third flow control component and controlling the air flow; igniting a mixture of hydrogen and oxygen to form a hydrogen flame through an ignition exhaust unit; introducing a carrier gas into the detection chamber through a second flow control component and controlling the carrier gas flow, so that the hydrogen flame ignites an object to be detected in the carrier gas; detecting the object to be detected through an optical detection unit to obtain the composition and content of the object to be detected.

[0015] Beneficial effects of the present invention: The present invention provides a flame photometer and a detection method, the flame photometer includes an air intake base, a detection chamber, a flow control unit, an ignition exhaust unit and an optical detection unit, the flow control unit includes a first flow control component, a second flow control component and a third flow control component, which are respectively used to control the hydrogen flow, control the carrier gas flow carrying the object to be detected and control the air flow, the ignition exhaust unit is used to ignite the mixed gas of hydrogen and air and discharge the combustion products, and the optical detection unit is used to detect the composition and content of the object to be detected. By setting the first flow control component, the second flow control component and the third flow control component, the flow of hydrogen, the carrier gas carrying the object to be detected and the air entering the detection chamber are controlled respectively, so that the airflow in the detection chamber is stable, so that the burning flame is kept stable, avoiding the problem that the flame luminosity is not within the detection range of the optical detection unit and the flame jump due to the unstable gas flow, and the detection result is more accurate. The first flow control component, the second flow control component and the third flow control component are independent of each other, and can independently control the flow of hydrogen and air without passing through the gas chromatograph, which is more efficient.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view of a flame photometry detector according to an embodiment of the present application;

[0018] Figure 2 is a top view of a flame photometry detector according to an embodiment of the present application;

[0019] Figure 3 is a partial cross-sectional view of a flame photometry detector according to an embodiment of the present application;

[0020] Figure 4 is a schematic structural diagram of an optical detection unit according to an embodiment of the present application;

[0021] Figure 5 is a schematic diagram of the structure of a first flow control component, a second flow control component and a third flow control component in an embodiment of the present application;

[0022] Figure 6 It is a schematic structural diagram of the air intake base of an embodiment of the present application.

[0023] Part Number Description

[0024] 1-air inlet base; 11-rectifier; 12-connecting hole; 13-nozzle interface; 21-first flow control component; 22-second flow control component; 23-third flow control component; 2a-gas path valve block; 2b-pressure sensor; 2c-regulating valve; 2d-inlet adapter; 2e-outlet adapter; 2f-fixed plate; 3-detection chamber; 31-adjusting ring; 32-matt quartz cover; 33-window connector; 4-ignition exhaust unit; 41-ignition bracket; 42-exhaust nut; 43-ignition component; 44-threaded sleeve; 45-screw cover; 5-optical detection unit; 51-photomultiplier tube; 52-lighting bracket; 53-connecting nut; 54-pressing ring; 55-gasket; 56-sealing gasket; 57-filter; 6-support; 7-nozzle. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0026] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner, so the diagrams only show the components related to the present application rather than drawing according to the number, shape and size of the components during actual implementation. The pattern, quantity and ratio of each component during actual implementation can be a random change, and its component layout pattern may also be more complicated. The structure, ratio, size, etc. illustrated by the accompanying diagrams of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the restrictive conditions that can be implemented in this application, so they do not have technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that can be produced by this application and the purpose that can be achieved, should still fall within the scope that the technical content disclosed in this application can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are also only for the convenience of narration, rather than for limiting the scope that can be implemented in this application. The change or adjustment of its relative relationship, without substantial change of technical content, should also be regarded as the scope that can be implemented in this application.

[0027] It should be noted that in this application, "first", "second", etc. are only used to distinguish similar objects, and are not used to limit the order or precedence of similar objects. The variations of "including", "having", etc. described above indicate that the scope covered by the subject of the word is not exclusive except for the examples shown by the word.

[0028] It is understood that the various numbers, step numbers, and other reference numerals recorded in this application are distinguished for the convenience of description and are not intended to limit the scope of this application. The size of the reference numerals in this application does not mean the order of execution. The execution order of each process should be determined by its function and internal logic.

[0029] The embodiments of the present application respectively provide a flame photometry detector and a flame photometry detection method, and these embodiments will be described in detail below.

[0030] See also Figures 1 to 6 ,like Figures 1 to 6 As shown, the embodiment of the present application provides a flame photometry detector, comprising:

[0031] Air intake base 1;

[0032] The detection chamber 3 is arranged on the air inlet base 1 and communicated with the air inlet base 1;

[0033] A flow control unit, comprising a first flow control component 21, a second flow control component 22 and a third flow control component 23; the first flow control component 21, the second flow control component 22 and the third flow control component 23 all have an air inlet and an air outlet, the air inlet of the first flow control component 21 is connected to hydrogen, the air inlet of the second flow control component 22 is connected to a carrier gas carrying an object to be measured, the air inlet of the third flow control component 23 is connected to air, and the air outlets of the first flow control component 21, the second flow control component 22 and the third flow control component 23 are respectively connected to the air inlet base 1; the first flow control component 21 is used to control the flow of hydrogen, the second flow control component 22 is used to control the flow of the carrier gas carrying the object to be measured, and the third flow control component 23 is used to control the flow of air;

[0034] The ignition and exhaust unit 4 is arranged on the detection chamber 3 and is connected to the detection chamber 3; the ignition and exhaust unit 4 is used to ignite the mixed gas of hydrogen and air and exhaust the combustion products;

[0035] The optical detection unit 5 is disposed on the detection chamber 3 and communicated with the detection chamber 3; the optical detection unit 5 is used to detect the composition and content of the object to be detected.

[0036] In this embodiment, the air intake base 1, the detection chamber 3 and the ignition exhaust unit 4 are connected in sequence from bottom to top. The detection chamber 3 is arranged at the top of the air intake base 1 and is connected to the top of the air intake base 1, and the gas can enter the detection chamber 3 through the air intake base 1. The ignition exhaust unit 4 is arranged at the top of the detection chamber 3 and is connected to the top of the detection chamber 3. The optical detection unit 5 is connected to the outer wall of the detection chamber 3, and is used to observe the flame and detect the composition and content of the object to be detected. Specifically, after the hydrogen is mixed with the air, the ignition exhaust unit 4 ignites the mixed gas of hydrogen and air to form a hydrogen flame, and then the hydrogen flame ignites the object to be detected in the carrier gas, and the flame observed by the optical detection unit 5 is the flame after the hydrogen flame ignites the object to be detected.

[0037] The outlet ends of the first flow control component 21, the second flow control component 22 and the third flow control component 23 are respectively connected to different positions of the air inlet base 1. The air inlet end of the first flow control component 21 is connected to external hydrogen, and the first flow control component 21 controls the flow of hydrogen entering the air inlet base 1. The air inlet end of the second flow control component 22 is connected to the external carrier gas carrying the object to be measured, and the second flow control component 22 controls the flow of the carrier gas carrying the object to be measured entering the air inlet base 1. The air inlet end of the third flow control component 23 is connected to the external air, and the third flow control component 23 controls the flow of air entering the air inlet base 1. Schematically, hydrogen, the carrier gas carrying the object to be measured and air can all be connected through pipelines or other means, that is, the air inlet end of the first flow control component 21 can be connected to external hydrogen through pipelines or other means, the air inlet end of the second flow control component 22 can be connected to external carrier gas carrying the object to be measured through pipelines or other means, and the air inlet end of the third flow control component 23 can be connected to external air through pipelines or other means.

[0038] During detection, hydrogen is introduced into the first flow control component 21 and the flow rate of hydrogen is controlled, and air is introduced into the third flow control component 23 and the flow rate of air is controlled. Both the air inlet base 1 and the detection chamber 3 have a hollow inner cavity, and hydrogen and air enter the air inlet base 1 and enter the detection chamber 3 through the air inlet base 1. When hydrogen and air fill the detection chamber 3, the ignition exhaust unit 4 ignites the mixed gas of hydrogen and air and forms a hydrogen flame. The detection method of hydrogen and air filling the detection chamber 3 can be achieved by the existing technology that has been disclosed. For example, a pressure gauge or a gas detector can be used to detect whether hydrogen and air fill the detection chamber 3. The carrier gas carrying the object to be detected is introduced into the second flow control component 22 and its flow rate is controlled. The object to be detected in the carrier gas is then ignited by a hydrogen flame, and the optical detection unit 5 is used to observe and detect to obtain the composition and content of the object to be detected.

[0039] The embodiment of the present application sets the first flow control component 21, the second flow control component 22 and the third flow control component 23 to control the flow of hydrogen, the carrier gas carrying the object to be detected and the air entering the detection chamber 3 respectively, so that the airflow in the detection chamber 3 is stable, so that the burning flame remains stable, and the problem of the flame luminosity not being within the detection range of the optical detection unit 5 and the flame jumping due to unstable gas flow is avoided, and the detection result is more accurate. The first flow control component 21, the second flow control component 22 and the third flow control component 23 are independent of each other, and can independently control the flow of hydrogen and air without going through the gas chromatograph, which is more efficient.

[0040] In one embodiment of the present application, Figure 1As shown, the ignition exhaust unit 4 includes an ignition bracket 41, an ignition assembly 43 and an exhaust nut 42, and the ignition bracket 41 and the bracket gasket are fixed to the top of the detection chamber 3 by a screw cap 45. An exhaust nut 42 is installed on the upper end of the ignition bracket 41, and the ignition assembly 43 is fixed on the side by a threaded sleeve 44.

[0041] In one embodiment of the present application, the first flow control component 21 , the second flow control component 22 and the third flow control component 23 are evenly distributed along the circumferential direction of the outer side wall of the air intake base 1 .

[0042] In this embodiment, the outer wall of the air intake base 1 is evenly distributed along the circumferential direction with a plurality of connection holes 12 for air intake, and the first flow control component 21, the second flow control component 22 and the third flow control component 23 are respectively connected to each connection hole 12 in a one-to-one correspondence. Among them, the heights of each connection hole 12 can be the same or different, which is not limited here. The above structure can avoid interference when the first flow control component 21, the second flow control component 22 and the third flow control component 23 are installed, and facilitate the mixing of the three gases.

[0043] In one embodiment of the present application, Figure 5 As shown, the first flow control component 21, the second flow control component 22 and the third flow control component 23 all include a pressure sensor 2b, an air circuit valve block 2a, a regulating valve 2c, an air inlet adapter 2d and an air outlet adapter 2e. The pressure sensor 2b, the regulating valve 2c, the air inlet adapter 2d and the air outlet adapter 2e are all arranged on the air circuit valve block 2a and are respectively connected to the air circuit valve block 2a.

[0044] In this embodiment, the pressure sensor 2b and the regulating valve 2c are respectively arranged on different outer side walls of the gas circuit valve block 2a. The pressure sensor 2b is fixed to the outer side wall of the gas circuit valve block 2a by means of the fixing plate 2f and the fixing plate screws. The pressure sensor 2b is used to detect the gas pressure in the gas circuit valve block 2a. The regulating valve nail fixes the regulating valve 2c at the upper end of the gas circuit valve block 2a. The regulating valve 2c is used to control the gas flow rate in the gas circuit valve block 2a. The air inlet adapter 2d and the air outlet adapter 2e are respectively connected to the two ends of the gas circuit valve block 2a. The gas circuit valve block 2a is connected to the gas through the air inlet adapter 2d and is connected to the air inlet base 1 through the air outlet adapter 2e. The above structure can accurately detect and control the pressure and flow of the gas in the gas circuit valve block 2a, stabilize the airflow in the detection chamber 3, thereby keeping the burning flame stable and improving the detection accuracy.

[0045] In one embodiment of the present application, Figure 2 As shown, the optical detection units 5 are provided in two groups and are arranged circumferentially along the outer wall of the detection chamber 3 .

[0046] In this embodiment, a single optical detection unit 5 may be one-sided when observing the flame, resulting in inaccurate detection results. By using a differential algorithm to compare the data of the two groups of optical detection units 5, the interference of background light can be removed, and the data missed by the single optical detection unit 5 can be compensated to improve the detection accuracy. The detection results of the two groups of optical detection units 5 can be mutually verified and compensated, the interference of background light can be removed, and the results not detected by the other optical detection unit 5 can be compensated, so as to obtain more accurate detection results and achieve higher precision detection.

[0047] In one embodiment of the present application, the two groups of optical detection units 5 are perpendicular to each other in the horizontal direction, which can facilitate observation of the flame from different angles to avoid omissions.

[0048] In one embodiment of the present application, Figure 4 As shown, the optical detection unit 5 includes a photomultiplier tube 51, a filter 57 and a lighting bracket 52. The photomultiplier tube 51 is arranged on the lighting bracket 52, and the filter 57 is sheathed on the outer wall of the photomultiplier tube 51 and arranged between the photomultiplier tube 51 and the lighting bracket 52.

[0049] In this embodiment, the photomultiplier tube 51 is a cylindrical transparent tube, through which the flame can be observed. The right end of the photomultiplier tube 51 is sleeved in the left end of the lighting bracket 52, and the photomultiplier tube 51 is fixed to the lighting bracket 52 by screws. The sealing gasket 56 and the filter 57 are arranged between the photomultiplier tube 51 and the lighting bracket 52. The filter 57 is jacketed on the outer wall of the photomultiplier tube 51 to prevent interference from natural light. A connecting nut 53 is jacketed on the hollow straight rod at the right end of the lighting bracket 52, and the connecting nut 53 is fixed to the lighting bracket 52 by a pressure ring 54 and a gasket 55. A window is opened on the outer wall of the detection chamber 3, and the window has a window joint 33. The connecting nut 53 is connected to the window joint 33. The above structure is simple, and the photomultiplier tube 51 can be more stably installed on the detection chamber 3, thereby improving the stability of the photomultiplier tube 51.

[0050] It can be understood that when two groups of optical detection units 5 that are perpendicular to each other in the horizontal direction are provided on the detection chamber 3, correspondingly, two groups of windows that are perpendicular to each other in the horizontal direction are provided on the outer wall of the detection chamber 3, and two groups of photomultiplier tubes 51 are used to simultaneously detect flames in two perpendicular directions.

[0051] In one embodiment of the present application, Figure 3 As shown, a matt quartz cover 32 and an adjustment ring 31 are arranged in the detection chamber 3 .

[0052] In this embodiment, the matte quartz cover 32 is sleeved in the detection chamber 3, and the adjustment ring 31 is sleeved on the outer wall of the top of the support 6. The matte quartz cover 32 can reduce the influence of temperature on the detection result on the one hand, and can avoid the interference of light reflection on the inner wall of the detection chamber 3 on the detection result on the other hand. The adjustment ring 31 can gather the mixed gas of air and hydrogen to play the role of gas gathering and combustion assistance.

[0053] In one embodiment of the present application, Figure 3 As shown, the detection chamber 3 is arranged on the air intake base 1 through a support 6, a nozzle 7 is arranged in the support 6, the nozzle 7 connects the detection chamber 3 and the air intake base 1, and a rectifier 11 is arranged between the air intake base 1 and the support 6.

[0054] In this embodiment, the detection chamber 3 is arranged on the top of the air intake base 1 through the support 6, the lower end of the support 6 is sleeved in the top of the air intake base 1, and the upper end of the support 6 is sleeved in the detection chamber 3. The nozzle 7 is located in the support 6, and the bottom end of the nozzle 7 is connected to the top of the air intake base 1. The top of the nozzle 7 is flush with the top of the support 6, or the top of the nozzle 7 extends out of the top of the support 6, and the nozzle 7 can connect the detection chamber 3 and the air intake base 1. By arranging a rectifier 11 between the air intake base 1 and the support 6, the hydrogen and air entering the air intake base 1 can be rectified, so that the mixed gas rises smoothly.

[0055] In one embodiment of the present application, Figure 3 As shown, the air inlet base 1 has a nozzle interface 13 , and the air inlet base 1 is connected to the nozzle 7 via the nozzle interface 13 .

[0056] In this embodiment, the bottom of the nozzle 7 is threadedly connected to the nozzle interface 13 of the air inlet base 1, and a nozzle gasket is installed between the two to prevent the object to be tested from overflowing and reducing the detection accuracy.

[0057] An embodiment of the present application also provides a flame photometry detection method, using a flame photometry detector as provided in the above embodiments, the method comprising: introducing hydrogen into the detection chamber 3 through a first flow control component 21 and controlling the hydrogen flow rate, introducing air into the detection chamber 3 through a third flow control component 23 and controlling the air flow rate; igniting a mixture of hydrogen and oxygen through an ignition exhaust unit 4 to form a hydrogen flame; introducing a carrier gas into the detection chamber 3 through a second flow control component 22 and controlling the carrier gas flow rate, so that the hydrogen flame ignites the object to be detected in the carrier gas; and detecting the object to be detected through an optical detection unit 5 to obtain the composition and content of the object to be detected.

[0058] In this embodiment, during the detection process, the pressure of the gas entering the detection chamber 3 is monitored by the pressure sensor 2b, and the monitoring result is fed back to the external host, and the host controls the regulating valve 2c to adjust to the required gas flow rate. The flow rate of each gas is controlled by the first flow control component 21, the second flow control component 22 and the third flow control component 23 respectively to obtain the required gas flow ratio. After the hydrogen flame burns, the two groups of optical detection units 5 start working and record data. Since the two groups of optical detection units 5 detect the flame luminosity from mutually perpendicular directions, the detection results of the two can be mutually verified and compensated by the differential algorithm, remove the interference of background light, compensate for the results not detected by the other detection system, obtain more accurate detection results, and achieve higher precision detection.

[0059] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A flame photometer, characterized in that: The flame photometry detector comprises: Air intake base; A detection chamber, disposed on the air inlet base and communicated with the air inlet base; A flow control unit, comprising a first flow control component, a second flow control component and a third flow control component; the first flow control component, the second flow control component and the third flow control component all have an air inlet and an air outlet, the air inlet of the first flow control component is connected to hydrogen, the air inlet of the second flow control component is connected to a carrier gas carrying an object to be detected, the air inlet of the third flow control component is connected to air, and the air outlets of the first flow control component, the second flow control component and the third flow control component are respectively connected to the air inlet base; the first flow control component is used to control the flow of hydrogen, the second flow control component is used to control the flow of the carrier gas carrying the object to be detected, and the third flow control component is used to control the flow of air; An ignition and exhaust unit is arranged on the detection chamber and communicated with the detection chamber; the ignition and exhaust unit is used to ignite the mixture of hydrogen and air and exhaust the combustion products; The optical detection unit is arranged on the detection chamber and communicated with the detection chamber; the optical detection unit is used to detect the composition and content of the object to be detected.

2. The flame photometry detector according to claim 1, characterized in that: The first flow control component, the second flow control component and the third flow control component are evenly distributed along the circumference of the outer side wall of the air intake base.

3. The flame photometry detector according to claim 2, characterized in that: The first flow control component, the second flow control component and the third flow control component all include a pressure sensor, an air circuit valve block, a regulating valve, an air inlet adapter and an air outlet adapter. The pressure sensor, the regulating valve, the air inlet adapter and the air outlet adapter are all arranged on the air circuit valve block and are respectively connected to the air circuit valve block.

4. The flame photometry detector according to claim 1, characterized in that: The optical detection units are provided in two groups and are arranged circumferentially along the outer wall of the detection chamber.

5. The flame photometry detector according to claim 4, characterized in that: The two groups of optical detection units are perpendicular to each other in the horizontal direction.

6. The flame photometry detector according to any one of claims 4 or 5, characterized in that: The optical detection unit comprises a photomultiplier tube, a filter and a lighting support. The photomultiplier tube is arranged on the lighting support. The filter is coated on the outer wall of the photomultiplier tube and is arranged between the photomultiplier tube and the lighting support.

7. The flame photometry detector according to claim 1, characterized in that: The detection chamber is provided with a matte quartz cover and an adjustment ring.

8. The flame photometry detector according to claim 1, characterized in that: The detection chamber is arranged on the air intake base through a support, a nozzle is arranged in the support, the nozzle connects the detection chamber and the air intake base, and a rectifier is arranged between the air intake base and the support.

9. The flame photometry detector according to claim 8, characterized in that: The air inlet base has a nozzle interface, and the air inlet base is connected with the nozzle through the nozzle interface.

10. A flame photometry detection method, characterized in that: Using the flame photometry detector according to any one of claims 1 to 9, the method comprises: Introduce hydrogen into the detection chamber through the first flow control component and control the hydrogen flow, and introduce air into the detection chamber through the third flow control component and control the air flow; Ignite the mixed gas of hydrogen and oxygen to form a hydrogen flame through the ignition exhaust unit; The carrier gas is introduced into the detection chamber through the second flow control component and the flow rate of the carrier gas is controlled, so that the hydrogen flame ignites the object to be detected in the carrier gas; The object to be tested is tested by an optical detection unit to obtain the composition and content of the object to be tested.

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