Online mass spectrum sampling analysis system for measuring high-humidity gas sample

Abstract

The invention discloses an on-line mass spectrum sampling analysis system for measuring a high-humidity gas sample, and relates to the technical field of gas mass spectrum detection, the analysis system comprises an on-line sampling module, a primary water removal module, a secondary water removal module, a sample pretreatment module, a sample introduction interface module, a mass spectrum detection module and a reverse cleaning module, the on-line sampling module is communicated with the primary water removal module through a pipeline, and the primary water removal module is communicated with the secondary water removal module through a pipeline. According to the method, low-temperature cold trap water pre-removal and adsorption filler deep water removal are combined for the first time, and efficiency and thoroughness are both considered; inert coating treatment is performed on the inner walls of key components, so that adsorption and reaction of active components are reduced; a selective permeable membrane is introduced on the basis of water removal, so that the efficiency of the target component entering the mass spectrum is further improved; sampling, preprocessing, detection, data processing and alarming are integrated, and automation and remote monitoring are achieved. After secondary water removal, the gas enters the pressure and flow stabilizing module immediately, so that humidity rebound is reduced, and the stability of mass spectrometry conditions is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas mass spectrometry, and particularly relates to an online mass spectrometry sampling and analyzing system for measuring high-humidity gas samples. BACKGROUND

[0002] Online mass spectrometry analysis technology has been widely applied in environmental monitoring, industrial tail gas analysis, food detection, biomedicine, etc. due to its real-time performance, fast analysis speed, and simultaneous detection of multiple components. However, the existing technology still has many deficiencies. When processing high-humidity gas samples (such as rain environment air, chemical industry wet tail gas, landfill leachate volatile gas, etc.), the existing online mass spectrometry system generally has the following technical problems: 1. Water in high-humidity gas is easy to enter the internal vacuum cavity of the mass spectrometer, causing pollution of key components such as ion source and quadrupole, and shortening the service life of the filament and the multiplier; 2. At the same time, water competes with target components for ionization, resulting in low ionization efficiency and unstable ionization of target compounds, detection signal drift, sensitivity and analysis accuracy decrease; 3. In addition, water is easy to condense at low-temperature pipelines or mass spectrometry interfaces, which easily introduces suspended particulate impurities, causing pipeline blockage, frequent maintenance of the equipment, high maintenance cost, and affecting the continuous and stable operation of the system.

[0003] The existing gas sample water removal schemes mainly include single cold trap water removal, single desiccant water removal, or simple heating water removal. Single cold trap water removal can only remove part of the free water, and the water removal efficiency is low, which cannot achieve the target humidity value in a high-humidity environment; single desiccant water removal has limited adsorption capacity and needs to be frequently replaced, which is difficult to meet the long-term online monitoring demand; heating water removal can avoid condensation, but cannot reduce the relative humidity of the gas, and the interference of water to mass spectrometry detection still exists. In addition, the existing series water removal device lacks integrated design of pressure and current stabilizers, adaptive interfaces, backflushing and cleaning modules, and data monitoring modules, and is not a water removal system specially designed for mass spectrometry, which affects the accuracy and repeatability of the analysis results of the mass spectrometer. SUMMARY

[0004] The present application aims to provide an online mass spectrometry sampling and analyzing system for measuring high-humidity gas samples to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: An on-line mass spectrum sampling analysis system for high humidity gas sample, the analysis system comprising an on-line sampling module, a first water removal module, a second water removal module, a sample pretreatment module, a sample injection interface module, a mass spectrum detection module and a reverse cleaning module, the on-line sampling module and the first water removal module being in pipeline communication, the first water removal module and the second water removal module being in pipeline communication, the second water removal module and the sample pretreatment module being in pipeline communication, the sample pretreatment module and the sample injection interface module being in pipeline communication, the sample pretreatment module and the reverse cleaning module being in pipeline communication, and the sample injection interface module and the mass spectrum detection module being in pipeline communication.

[0006] The high humidity gas is collected by the on-line sampling module, and the collected high humidity gas enters the first water removal module for water removal, so that most of the free water in the gas can be removed, then the low humidity gas with most of the water removed enters the second water removal module for further water removal, so that the humidity of the gas is further reduced to within 5%, then the gas enters the sample pretreatment module to ensure the stability of the pressure and flow rate of the gas entering the mass spectrum, thereby improving the detection repeatability, then the gas enters the mass spectrum detection module through the permeation of the sample injection interface module for detection, and the reverse cleaning module can periodically introduce high-purity nitrogen to blow each module and pipeline.

[0007] Further, the analysis system further comprises a data acquisition and processing module and a result output module, the mass spectrum detection module and the data acquisition and processing module being electrically connected, and the data acquisition and processing module and the result output module being electrically connected.

[0008] After the gas is detected by the mass spectrum detection module, the detection data is transmitted to the data acquisition and processing module through electrical connection, the data acquisition and processing module is used for receiving and processing the monitoring data of each module, controlling the operating parameters of each module, and signal processing and quantitative analysis, the processed data is transmitted to the result output module through electrical connection, the result output module is used for real-time display of the concentration change curve and the current concentration value and printing of the analysis report, and the result output module will alarm when an abnormal state is detected.

[0009] Further, the on-line sampling module comprises a sampling probe, a quantitative pump and a sampling pipeline, the sampling probe and the quantitative pump being in pipeline communication, the quantitative pump and the sampling pipeline being in pipeline communication, and the sampling pipeline and the first water removal module being in pipeline communication.

[0010] The sampling probe collects the high humidity gas, the flow rate of the quantitative pump can be adjusted to control the collection amount of the high humidity gas, and the collected high humidity gas is transported to the first water removal module through the sampling pipeline for water removal.

[0011] Further, a dust filter screen is arranged at the gas inlet end of the sampling probe, and a heating wire is arranged on the outer wall of the sampling probe.

[0012] The dustproof filter screen installed at the air inlet end of the sampling probe can filter and remove dust from the collected gas, and the heating wire on the outer wall of the sampling probe can heat the gas inside, with the temperature controlled between 30-50℃ to prevent condensation of the gas.

[0013] Further, the primary water removal module comprises a low-temperature cold trap cavity, a refrigeration sheet, a condensed water collection assembly and an S-shaped pipeline, the low-temperature cold trap cavity is internally provided with the refrigeration sheet, the S-shaped pipeline passes through the low-temperature cold trap cavity, the S-shaped pipeline is in pipeline communication with the condensed water collection assembly, the sampling pipeline is in pipeline communication with the S-shaped pipeline, and the S-shaped pipeline is in pipeline communication with the secondary water removal module.

[0014] The high-humidity gas enters the S-shaped pipeline from the sampling pipeline, and since the S-shaped pipeline passes through the low-temperature cold trap cavity, the high-humidity gas passes through the low-temperature cold trap cavity, the refrigeration sheet can control the temperature inside the low-temperature cold trap cavity, and the refrigeration temperature can be adjusted according to the feedback humidity, the condensed water in the high-humidity gas is discharged and flows into the condensed water collection assembly, the inner wall of the low-temperature cold trap cavity is coated with an inert coating, and the S-shaped pipeline can prolong the residence time of the gas, thereby prolonging the water removal time of the gas, and the low-humidity gas is obtained after removing most of the free water in the high-humidity gas.

[0015] Further, the condensed water collection assembly comprises a water inlet pipe, a liquid infusion pump, a water collection tank and a drain valve, the water inlet pipe is in pipeline communication with the S-shaped pipeline, the water inlet pipe is in pipeline communication with the liquid infusion pump, the liquid infusion pump is in pipeline communication with the water collection tank, and the water collection tank is provided with the drain valve at one side.

[0016] The condensed water discharged from the high-humidity gas flows into the water inlet pipe along the S-shaped pipeline, the amount of the condensed water flowing in is controlled by the liquid infusion pump, the condensed water finally flows into the water collection tank, and the drain valve at one side of the water collection tank is used to discharge the condensed water in the water collection tank.

[0017] Further, the secondary water removal module comprises a cylindrical container, adsorption filler, air-permeable filter membranes and a humidity sensor, the cylindrical container is in pipeline communication with the S-shaped pipeline at the inlet and in pipeline communication with the sample pretreatment module at the outlet, the adsorption filler is arranged inside the cylindrical container, the air-permeable filter membranes are provided in two, the two air-permeable filter membranes are respectively fixed at two ends inside the cylindrical container, and the humidity sensor is arranged at the outlet of the cylindrical container.

[0018] The low-humidity gas is transported from the outlet of the S-shaped pipeline into the cylindrical container, the cylindrical container is filled with the adsorption filler, the adsorption filler can be selected from molecular sieves with a particle size of one millimeter, the molecular sieves can adsorb the water in the low-humidity gas, the cylindrical container is respectively provided with a filler inlet and a filler outlet at two ends, new molecular sieves enter the cylindrical container from the inlet, and the molecular sieves that have adsorbed water are discharged from the outlet, the air-permeable filter membranes at two ends of the cylindrical container further remove water from the low-humidity gas, and the humidity sensor at the top of the cylindrical container controls the humidity of the output gas, and an alarm is issued if the humidity is too large.

[0019] Further, the sample pretreatment module comprises a pressure stabilizing valve, a flow meter, a buffer cavity and a three-way valve, the cylindrical container is in communication with the pressure stabilizing valve, the pressure stabilizing valve is in communication with the flow meter, the flow meter is in communication with the buffer cavity, the buffer cavity is in communication with the three-way valve, the three-way valve is in communication with the sample inlet interface module, and the three-way valve is in communication with the reverse cleaning module.

[0020] After water is removed, the gas from the cylindrical container outlet enters the sample pretreatment module, the pressure stabilizing valve first controls the pressure range of the gas and ensures the stability of the pressure, the flow meter ensures the stability of the flow of the gas, and is matched with the flow rate during sampling, so that the stability of the pressure and the flow of the gas entering the mass spectrometer can improve the detection repeatability, the inner wall of the buffer cavity is coated with an inert coating to reduce sample loss and cross contamination, and the gas passes through the three-way valve from the buffer cavity, and the other two outlets of the three-way valve are connected with the sample inlet interface module and the reverse cleaning module, respectively.

[0021] Further, the sample inlet interface module comprises a permeation assembly and an interface pipeline, the permeation assembly is in communication with the interface pipeline, and the three-way valve is in communication with the interface pipeline.

[0022] After the gas enters the sample inlet interface module from the three-way valve, the temperature is first controlled at 30-40 DEG C, so as to ensure stable permeation efficiency and selective permeation of the target component, the interface pipeline is in communication with the mass spectrometer detection module, the gas permeated through the permeation assembly enters the mass spectrometer detection module through the interface pipeline, and the inner wall of the interface pipeline is coated with an inert coating to reduce sample loss and cross contamination.

[0023] Further, the reverse cleaning module comprises a steel cylinder and a pressure regulating valve, the three-way valve is in communication with the pressure regulating valve, and the pressure regulating valve is in communication with the steel cylinder.

[0024] The reverse cleaning module is used for periodically introducing high-purity nitrogen to clean each module, the steel cylinder stores high-purity nitrogen, the pressure regulating valve controls the pressure and flow of the output nitrogen, and the nitrogen can enter the sample pretreatment module through the three-way valve and clean the pipeline of the entire analysis system.

[0025] Compared with the prior art, the application has the beneficial effects that: the "low-temperature cold trap pre-water removal" and "adsorption filler deep water removal" are combined for the first time, the efficiency and thoroughness are considered, the inner wall of the key component is treated with an inert coating to reduce active component adsorption and reaction, the selective permeation membrane is introduced on the basis of water removal to further improve the efficiency of the target component entering the mass spectrometer, the sampling, pretreatment, detection, data processing and alarm are integrated to realize automation and remote monitoring, the reverse cleaning module and the automatic drainage function reduce the frequency of manual maintenance, the S-shaped pipeline prolongs the gas residence time, improves the low-temperature water removal efficiency, and avoids direct entry of liquid water into the subsequent module, the secondary water removal is immediately followed by the pressure stabilizing and flow stabilizing module to reduce humidity rebound and flow fluctuation and ensure the stability of the mass spectrometer analysis conditions. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall composition and structure of the system of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the online sampling module of the present invention; Figure 4 for Figure 4 A magnified view of part A of the view; Figure 5 This is a schematic diagram of the external structure of the primary water removal module of the present invention; Figure 6 This is a schematic diagram of the internal structure of the primary water removal module of the present invention; Figure 7 This is a schematic diagram of the internal structure of the two-stage water removal module of the present invention; Figure 8 This is a schematic diagram of the sample pretreatment module and the sample injection interface module of the present invention.

[0027] In the diagram: 1. Online sampling module; 11. Sampling probe; 12. Quantitative pump; 13. Sampling pipeline; 14. Dust filter; 15. Heating wire; 2. Primary water removal module; 21. Low-temperature cold trap cavity; 22. Cooling element; 23. Condensate collection assembly; 231. Water inlet pipe; 232. Infusion pump; 233. Water collection tank; 234. Drain valve; 24. S-shaped pipe; 3. Secondary water removal module; 31. Cylindrical container; 32. Adsorption packing; 33. Air-permeable filter membrane; 34. Humidity sensor; 4. Sample pretreatment module; 41. Pressure regulating valve; 42. Flow meter; 43. Buffer cavity; 44. Three-way valve; 5. Sample inlet interface module; 51. Permeation assembly; 52. Interface pipeline; 6. Mass spectrometry detection module; 7. Data acquisition and processing module; 8. Result output module; 9. Reverse cleaning module; 91. Gas cylinder; 92. Pressure regulating valve. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example: Figures 1-8 As shown, the present invention provides a technical solution for an online mass spectrometry sampling and analysis system for measuring high humidity gas samples.

[0030] like Figures 1-2As shown, an online mass spectrometry sampling and analysis system for measuring high-humidity gas samples is disclosed. The analysis system includes an online sampling module 1, a primary water removal module 2, a secondary water removal module 3, a sample pretreatment module 4, an injection interface module 5, a mass spectrometry detection module 6, and a reverse cleaning module 9. The online sampling module 1 and the primary water removal module 2 are connected by pipes; the primary water removal module 2 and the secondary water removal module 3 are connected by pipes; the secondary water removal module 3 and the sample pretreatment module 4 are connected by pipes; the sample pretreatment module 4 and the injection interface module 5 are connected by pipes; the sample pretreatment module 4 and the reverse cleaning module 9 are connected by pipes; and the injection interface module 5 and the mass spectrometry detection module 6 are connected by pipes.

[0031] High-humidity gas is collected by the online sampling module 1. The collected high-humidity gas enters the first-stage dehydration module 2 for dehydration, which removes most of the free water in the gas. Then, the low-humidity gas with most of the water removed enters the second-stage dehydration module 3 for further dehydration, which further reduces the humidity of the gas to less than 5%. Then, the gas enters the sample pretreatment module 4 to ensure that the pressure and flow rate of the gas when it enters the mass spectrometer are stable, thereby improving the repeatability of the detection. Then, the gas permeates into the mass spectrometer detection module 6 through the sample introduction interface module 5 for detection. The reverse cleaning module 9 can periodically introduce high-purity nitrogen to purge each module and pipeline.

[0032] like Figure 1 As shown, the analysis system also includes a data acquisition and processing module 7 and a result output module 8. The mass spectrometry detection module 6 and the data acquisition and processing module 7 are electrically connected, and the data acquisition and processing module 7 and the result output module 8 are electrically connected.

[0033] After the gas is detected by the mass spectrometry detection module 6, the detection data is transmitted to the data acquisition and processing module 7 via electrical connection. The data acquisition and processing module 7 is used to receive and process the monitoring data of each module, control the operating parameters of each module, and perform signal processing and quantitative analysis. The processed data is transmitted to the result output module 8 via electrical connection. The result output module 8 is used to display the concentration change curve and the current concentration value in real time and print the analysis report. The result output module 8 will issue an alarm when it detects an abnormal state.

[0034] like Figure 3 As shown, the online sampling module 1 includes a sampling probe 11, a metering pump 12, and a sampling pipeline 13. The sampling probe 11 and the metering pump 12 are connected by a pipeline, the metering pump 12 and the sampling pipeline 13 are connected by a pipeline, and the sampling pipeline 13 is connected by a pipeline to the primary water removal module 2.

[0035] The sampling probe 11 collects high-humidity gas, and the flow rate of the metering pump 12 can be adjusted to control the amount of high-humidity gas collected. The collected high-humidity gas is then transported to the first-stage dehumidification module 2 through the sampling pipeline 13 for dehumidification.

[0036] As shown in the drawings, the sampling probe 11 is provided with a dustproof filter screen 14 at the air inlet end, and the outer wall of the sampling probe 11 is provided with a heating wire 15. Figure 4

[0037] The dustproof filter screen 14 installed at the air inlet end of the sampling probe 11 can filter and remove dust from the collected gas, and the heating wire 15 on the outer wall of the sampling probe 11 can heat the internal gas. The temperature of the heating wire 15 is controlled between 30-50℃ to prevent gas condensation.

[0038] As shown in the drawings, the first-stage water removal module 2 includes a low-temperature cold trap cavity 21, a refrigeration fin 22, a condensed water collection assembly 23, and an S-shaped pipeline 24. The low-temperature cold trap cavity 21 is internally provided with the refrigeration fin 22, the S-shaped pipeline 24 passes through the low-temperature cold trap cavity 21, the S-shaped pipeline 24 and the condensed water collection assembly 23 are in pipeline communication, the sampling pipeline 13 and the S-shaped pipeline 24 are in pipeline communication, and the S-shaped pipeline 24 and the second-stage water removal module 3 are in pipeline communication. Figures 5-6

[0039] High-humidity gas enters the inside of the S-shaped pipeline 24 from the sampling pipeline 13. Since the S-shaped pipeline 24 passes through the low-temperature cold trap cavity 21, the high-humidity gas is cooled by the refrigeration fin 22 when passing through the low-temperature cold trap cavity 21, and the temperature inside the low-temperature cold trap cavity 21 is controlled at -10-0℃. The temperature of the refrigeration fin 22 can be adjusted according to the feedback humidity. The condensed water in the high-humidity gas flows into the condensed water collection assembly 23. The inner wall of the low-temperature cold trap cavity 21 is coated with an inert coating. The S-shaped pipeline 24 can prolong the residence time of the gas, thereby prolonging the water removal time of the gas. After removing 80%-90% of the free water in the high-humidity gas, low-humidity gas is obtained.

[0040] As shown in the drawings, the condensed water collection assembly 23 includes a water inlet pipe 231, a liquid delivery pump 232, a water collection tank 233, and a drain valve 234. The water inlet pipe 231 and the S-shaped pipeline 24 are in pipeline communication, the water inlet pipe 231 and the liquid delivery pump 232 are in pipeline communication, the liquid delivery pump 232 and the water collection tank 233 are in pipeline communication, and the water collection tank 233 is provided with the drain valve 234 on one side. Figure 5

[0041] The condensed water discharged from the high-humidity gas flows into the water inlet pipe 231 along the S-shaped pipeline 24, the amount of condensed water flowing in is controlled by the liquid delivery pump 232, and the condensed water finally flows into the water collection tank 233. The drain valve 234 on one side of the water collection tank 233 is used to discharge the condensed water in the water collection tank 233.

[0042] As shown in the drawings, the second-stage water removal module 3 includes a molecular sieve cavity 31, a molecular sieve 32, and a water vapor removal pump 33. The molecular sieve cavity 31 is internally provided with the molecular sieve 32, and the water vapor removal pump 33 is in pipeline communication with the molecular sieve cavity 31. Figure 7 ​​​As shown, the secondary dehydration module 3 includes a cylindrical container 31, an adsorption packing material 32, a breathable filter membrane 33, and a humidity sensor 34. The inlet of the cylindrical container 31 is connected to the S-shaped pipe 24, and the outlet of the cylindrical container 31 is connected to the sample pretreatment module 4. The adsorption packing material 32 is placed inside the cylindrical container 31. Two breathable filter membranes 33 are provided, and the two breathable filter membranes 33 are respectively fixed at both ends inside the cylindrical container 31. A humidity sensor 34 is provided at the outlet of the cylindrical container 31.

[0043] Low-humidity gas is transported from the outlet of S-shaped pipe 24 to the cylindrical container 31. The cylindrical container 31 is filled with adsorption packing 32, which can be a molecular sieve with a particle size of one millimeter. The molecular sieve can adsorb the moisture in the low-humidity gas. The cylindrical container 31 is provided with a packing inlet and a packing outlet at both ends. New molecular sieve enters the cylindrical container 31 from the inlet, and the molecular sieve that has adsorbed moisture is discharged from the outlet. The breathable filter membranes 33 at both ends of the cylindrical container 31 further remove moisture from the low-humidity gas. The humidity sensor 34 at the top of the cylindrical container 31 controls the humidity of the output gas. If the humidity is too high, an alarm will be issued.

[0044] like Figure 8 As shown, the sample pretreatment module 4 includes a pressure regulating valve 41, a flow meter 42, a buffer chamber 43, and a three-way valve 44. The cylindrical container 31 is connected to the pressure regulating valve 41 by a pipeline, the pressure regulating valve 41 is connected to the flow meter 42 by a pipeline, the flow meter 42 is connected to the buffer chamber 43 by a pipeline, the buffer chamber 43 is connected to the three-way valve 44 by a pipeline, the three-way valve 44 is connected to the sample inlet module 5 by a pipeline, and the three-way valve 44 is connected to the reverse cleaning module 9 by a pipeline.

[0045] After water removal, the gas enters the sample pretreatment module 4 from the outlet of the cylindrical container 31. The pressure regulating valve 41 first controls the pressure range of the gas and ensures the stability of the pressure. The flow meter 42 ensures the stability of the gas flow rate and matches the flow rate during sampling. This stability of the gas pressure and flow rate when entering the mass spectrometer can improve the repeatability of the detection. The inner wall of the buffer chamber 43 is coated with an inert coating to reduce sample loss and cross-contamination. The gas passes from the buffer chamber 43 through the three-way valve 44. The other two outlets of the three-way valve 44 are connected to the sample injection interface module 5 and the reverse cleaning module 9, respectively.

[0046] like Figure 8 As shown, the sample injection interface module 5 includes a permeation component 51 and an interface pipeline 52, which are connected in a pipeline, and a three-way valve 44 is connected in a pipeline to the interface pipeline 52.

[0047] After the gas enters the sample injection interface module 5 from the three-way valve 44, the temperature is first controlled at 30-40 DEG C to ensure stable permeation efficiency and selective permeation of the target component, the interface pipeline 52 is communicated with the mass spectrum detection module 6, the gas permeated through the permeation assembly 51 enters the mass spectrum detection module 6 through the interface pipeline 52, and the inner wall of the interface pipeline 52 is inertly coated to reduce sample loss and cross contamination.

[0048] As shown in Figure 8 The reverse cleaning module 9 includes a steel cylinder 91 and a pressure regulating valve 92, the three-way valve 44 and the pressure regulating valve 92 are communicated, and the pressure regulating valve 92 and the steel cylinder 91 are communicated.

[0049] The reverse cleaning module 9 is used for periodically introducing high-purity nitrogen to clean each module, the steel cylinder 91 stores high-purity nitrogen, the pressure regulating valve 92 controls the pressure and flow of the output nitrogen, and the nitrogen can enter the sample pretreatment module 4 through the three-way valve 44 and clean the pipeline of the entire analysis system.

[0050] The working principle of the present application is as follows: The high-humidity gas collected by the sampling probe 11 enters the primary water removal module 2 to remove free water in the gas, and then the low-humidity gas with most of the water removed enters the secondary water removal module 3 to remove water again, so that the humidity of the gas is further reduced to less than 5%, and then the gas enters the sample pretreatment module 4 to ensure that the pressure and flow of the gas entering the mass spectrum are stable, thereby improving the detection repeatability, and then the gas enters the mass spectrum detection module 6 through the permeation of the sample injection interface module 5 for detection, after the gas is detected by the mass spectrum detection module 6, the detection data are transmitted to the data acquisition and processing module 7 through electrical connection, the data acquisition and processing module 7 is used for receiving and processing monitoring data of each module, controlling operating parameters of each module, and signal processing and quantitative analysis, the processed data are transmitted to the result output module 8 through electrical connection, the result output module 8 is used for real-time display of the concentration change curve and the current concentration value and printing of the analysis report, and the result output module 8 will alarm when an abnormal state is detected, and the reverse cleaning module 9 can periodically introduce high-purity nitrogen to blow each module and the pipeline.

[0051] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An on-line mass spectrometric sampling and analysis system for determining a high humidity gas sample, characterized by: The analysis system comprises an online sampling module (1), a first water removal module (2), a second water removal module (3), a sample pretreatment module (4), a sample injection interface module (5), a mass spectrometric detection module (6) and a reverse cleaning module (9), the online sampling module (1) and the first water removal module (2) are in pipeline communication, the first water removal module (2) and the second water removal module (3) are in pipeline communication, the second water removal module (3) and the sample pretreatment module (4) are in pipeline communication, the sample pretreatment module (4) and the sample injection interface module (5) are in pipeline communication, the sample pretreatment module (4) and the reverse cleaning module (9) are in pipeline communication, and the sample injection interface module (5) and the mass spectrometric detection module (6) are in pipeline communication.

2. The on-line mass spectrometric sampling and analysis system for high humidity gas samples according to claim 1, characterized in that: The analysis system further comprises a data acquisition and processing module (7) and a result output module (8), the mass spectrometric detection module (6) and the data acquisition and processing module (7) are electrically connected, and the data acquisition and processing module (7) and the result output module (8) are electrically connected.

3. The on-line mass spectrometric sampling and analysis system for high humidity gas samples according to claim 2, characterized in that: The online sampling module (1) comprises a sampling probe (11), a constant flow pump (12) and a sampling pipeline (13), the sampling probe (11) and the constant flow pump (12) are in pipeline communication, the constant flow pump (12) and the sampling pipeline (13) are in pipeline communication, and the sampling pipeline (13) and the first water removal module (2) are in pipeline communication.

4. The on-line mass spectrometric sampling and analysis system for high humidity gas samples according to claim 3, characterized in that: A dustproof filter screen (14) is arranged at the air inlet end of the sampling probe (11), and a heating wire (15) is arranged on the outer wall of the sampling probe (11).

5. The on-line mass spectrometric sampling and analysis system for high humidity gas samples according to claim 4, characterized in that: The first water removal module (2) comprises a low-temperature cold trap cavity (21), a refrigeration sheet (22), a condensed water collection assembly (23) and an S-shaped pipeline (24), the low-temperature cold trap cavity (21) is internally provided with the refrigeration sheet (22), the S-shaped pipeline (24) penetrates through the low-temperature cold trap cavity (21), the S-shaped pipeline (24) and the condensed water collection assembly (23) are in pipeline communication, the sampling pipeline (13) and the S-shaped pipeline (24) are in pipeline communication, and the S-shaped pipeline (24) and the second water removal module (3) are in pipeline communication.

6. The on-line mass spectrometric sampling and analysis system for measuring high humidity gas samples according to claim 5, characterized in that: The condensed water collection assembly (23) comprises a water inlet pipe (231), a liquid delivery pump (232), a water collection tank (233) and a drain valve (234), the water inlet pipe (231) and the S-shaped pipeline (24) are in pipeline communication, the water inlet pipe (231) and the liquid delivery pump (232) are in pipeline communication, the liquid delivery pump (232) and the water collection tank (233) are in pipeline communication, and one side of the water collection tank (233) is provided with the drain valve (234).

7. The on-line mass spectrometric sampling and analysis system for measuring high humidity gas samples according to claim 6, characterized in that: The secondary water removal module (3) comprises a cylindrical container (31), adsorption filler (32), air-permeable filter membrane (33) and humidity sensor (34), the cylindrical container (31) inlet and S-shaped pipeline (24) pipeline communication, the cylindrical container (31) outlet and sample pretreatment module (4) pipeline communication, the adsorption filler (32) is placed in the cylindrical container (31) inside, the air-permeable filter membrane (33) is equipped with two, two air-permeable filter membranes (33) are fixed in the cylindrical container (31) two ends respectively, the cylindrical container (31) outlet is equipped with humidity sensor (34).

8. The on-line mass spectrometric sampling and analysis system for measuring high humidity gas samples according to claim 7, characterized in that: The sample pretreatment module (4) comprises a pressure stabilizing valve (41), a flow meter (42), a buffer cavity (43) and a three-way valve (44), the cylindrical container (31) and the pressure stabilizing valve (41) pipeline communication, the pressure stabilizing valve (41) and the flow meter (42) pipeline communication, the flow meter (42) and the buffer cavity (43) pipeline communication, the buffer cavity (43) and the three-way valve (44) pipeline communication, the three-way valve (44) and the sample inlet interface module (5) pipeline communication, the three-way valve (44) and the reverse cleaning module (9) pipeline communication.

9. The on-line mass spectrometric sampling and analysis system for measuring high humidity gas samples according to claim 8, characterized in that: The sample inlet interface module (5) comprises a permeation assembly (51) and an interface pipeline (52), the permeation assembly (51) and the interface pipeline (52) pipeline communication, the three-way valve (44) and the interface pipeline (52) pipeline communication.

10. The on-line mass spectrometric sampling and analysis system for measuring high humidity gas samples according to claim 9, characterized in that: The reverse cleaning module (9) comprises a steel bottle (91) and a pressure regulating valve (92), the three-way valve (44) and the pressure regulating valve (92) pipeline communication, the pressure regulating valve (92) and the steel bottle (91) pipeline communication.

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