Monitoring system for water-soluble ions in air and detection method for capture efficiency

Abstract

The present invention relates to the field of environmental monitoring, and in particular to a monitoring system for water-soluble ions in air and a capture efficiency detection method. The monitoring system comprises a separation device for capturing gaseous soluble target matter in an input sample gas and allowing solid particulate matter in the sample gas to pass through; a detection unit for performing component analysis on an input solution; a first concentration measurement pipeline for obtaining the concentration of a first portion of the target solution; a particle collection device for absorbing solid particulate matter to form a second portion of the target solution; a second concentration measurement pipeline for obtaining the concentration of the second portion of the target solution; an exhaust gas collection pipeline for collecting target matter remaining in the gas passing through the particle collection device to form a third portion of the target solution and obtaining the concentration of the third portion of the target solution; and a calculation device for calculating the capture efficiency based on the output result of the detection unit and parameters in the monitoring system.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection, and in particular to a monitoring system for water-soluble ions in air and a method for detecting capture efficiency. Background Art

[0002] Atmospheric particulate matter (such as PM 10 , PM 2.5 Water-soluble ions are an important component of atmospheric particulate matter, and monitoring their concentration is crucial for air pollution control.

[0003] The traditional method for analyzing the water-soluble ion composition of atmospheric particulate matter involves collecting the particles through a filter membrane, then transporting them to the laboratory for weighing, dissolution, extraction, and analysis using ion chromatography. This method has drawbacks such as large particle sampling errors, high sample loss during storage, time-consuming and labor-intensive processing, and an inability to reflect the high-frequency variations in the water-soluble components of atmospheric particulate matter.

[0004] For the continuous automatic monitoring system of water-soluble ions, the capture efficiency of gas samples and particle samples is very important, and both are required to be ≥98% ("HJ 1328-2023 Technical Specification for Continuous Automatic Monitoring of Water-Soluble Ions in Ambient Air Particulate Matter (PM2.5)"). However, the monitoring system in the existing technology does not provide an effective test method for the capture efficiency.

[0005] The continuous automatic monitoring system for water-soluble ions in the air can monitor Cl in gaseous and particulate matter. - 、NO3 - , SO4 2- 、Na + NH4 + , K + Mg 2+ , Ca 2+ As mentioned above, plasma content, whether it is gaseous water-soluble ions or solid water-soluble ions, will eventually dissolve in the liquid and be detected by ion chromatography. Therefore, the capture efficiency of the absorption liquid for the above-mentioned water-soluble ions in the air is crucial. If the capture efficiency is too low, the measured concentration will be low.

[0006] Currently, a small number of manufacturers use standard solutions to generate aerosols, produce calibration gases, and pass them through continuous automatic monitoring systems for water-soluble ions in the air to conduct capture efficiency tests. However, the aerosol gas generated by the standard solution contains mostly ion components dissolved in small liquid droplets. Since they themselves come from the solution, they are easily reabsorbed by the liquid solution after entering the system. In reality, the water-soluble ions in the air are either in gaseous form or in solid form within solid particles. The proportion of liquid water-soluble ions in the air is very low. Therefore, the standard gas generated by the standard solution cannot truly represent the efficiency of the water-soluble ions in the air aerosol being absorbed and captured by the solution. The current mainstream continuous automatic monitoring systems for water-soluble ions in the air directly use standard liquids to calibrate and calibrate the ion chromatograph, and do not carry out capture efficiency testing technology for water-soluble ions in air aerosols.

[0007] In summary, the existing technology lacks reliable testing methods for the capture efficiency of water-soluble ions by monitoring systems. Summary of the Invention

[0008] In order to solve the deficiencies in the above-mentioned prior art solutions, the present invention provides a system for monitoring water-soluble ions in air and a method for detecting capture efficiency.

[0009] The objectives of the present invention are achieved through the following technical solutions.

[0010] A system for monitoring water-soluble ions in air, comprising:

[0011] A separation device for capturing gaseous soluble target substances in the input sample gas and allowing solid particles in the sample gas to pass through;

[0012] A detection unit, used for analyzing the components of the input solution;

[0013] a first concentration measurement pipeline, connected to the separation device and the detection unit, respectively, for obtaining the concentration of the first portion of the target solution;

[0014] a particle collecting device connected to the separation device and configured to absorb the solid particles to form a second portion of the target solution;

[0015] a second concentration measurement pipeline, connected to the particle collection device and the detection unit, respectively, for obtaining the concentration of the second portion of the target solution;

[0016] an exhaust gas collection pipeline connected to the particulate matter collection device and the detection unit, and configured to collect the target substance remaining in the gas passing through the particulate matter collection device to form a third portion of the target substance solution, and to obtain a concentration of the third portion of the target substance solution;

[0017] The calculation device is used to calculate the capture efficiency according to the output result of the detection unit and the parameters in the monitoring system.

[0018] In some embodiments, the first concentration pipeline includes a first pump, a first switching valve, a first absorption bottle, a first reverse osmosis filter, and a first solvent bottle connected in sequence, a pipeline between the first absorption bottle and the first reverse osmosis filter is connected to the detection unit, and the first switching valve is used to selectively connect the outlet of the first pump to the first absorption bottle or the outside world;

[0019] The second concentration pipeline includes a second pump, a second switching valve, a second absorption bottle, a second reverse osmosis filter and a second solvent bottle connected in sequence. The pipeline between the second absorption bottle and the second reverse osmosis filter is connected to the detection unit. The second switching valve is used to selectively connect the outlet of the second pump to the second absorption bottle or the outside world.

[0020] In some embodiments, the tail gas collection pipeline includes:

[0021] A first condenser and a third absorption bottle, wherein the inlet of the first condenser is connected to the gas outlet of the particle collection device, the liquid outlet of the first condenser is connected to the third absorption bottle, and the third absorption bottle is connected to the detection unit through a third pump.

[0022] In some embodiments, the tail gas collection pipeline further includes:

[0023] a third reverse osmosis filter and a third solvent bottle, the inlet of the first condenser is connected to the gas outlet of the particulate matter collection device, the liquid outlet of the first condenser is connected to the third absorption bottle, and the pipeline between the third absorption bottle and the third reverse osmosis filter is connected to the detection unit through a third pump.

[0024] In some embodiments, the separation device includes a dissolver, the particle collection device includes a steam generator, a particle moisture absorption and growth chamber, a second condenser and an impactor connected in sequence, the particle moisture absorption and growth chamber is connected to the separation device, and the detection unit adopts an ion chromatograph.

[0025] The present invention further provides a method for detecting the capture efficiency of a water-soluble ion monitoring system in air, using the monitoring system described in any of the above embodiments, the detection method comprising:

[0026] S1. The sample gas passes through a separation device, a particle collection device, and an exhaust gas collection pipeline in sequence. The separation device captures the gaseous soluble target in the sample gas to form a first target solution. The particle collection device absorbs the solid particles in the sample gas to form a second target solution. The exhaust gas collection pipeline collects the residual target and water to form a third target solution.

[0027] S2. The first concentration measurement pipeline obtains the first portion of the target solution, concentrates it, and then inputs it into the detection unit;

[0028] S3, a second concentration measurement pipeline obtains the second portion of the target solution, concentrates it, and then inputs it into the detection unit;

[0029] S4, the detection unit outputs the concentration C of the solution input from the first concentration measurement pipeline in the i-th sampling period. 1i The detection unit is based on the second concentration measurement pipeline input solution within the i-th sampling period, and outputs the concentration C 2i The detection unit outputs a concentration C0 of the solution input from the tail gas collection pipeline within the 1st to Nth cycles, i = 1, 2 ... N, where N represents the number of sampling cycles after which the third part of the target solution reaches the concentration detection condition;

[0030] S5. The calculation device obtains the total capture efficiency R1 according to the concentration value output by the detection unit and the working parameters of the monitoring system.

[0031] In some embodiments, further comprising:

[0032] A particle filter is added to the separation device of the monitoring system, wherein the particle filter is used to intercept solid particles in the sample gas;

[0033] Obtaining the gaseous soluble target capture efficiency R2 of the monitoring system with the particulate filter added through steps S1 to S5;

[0034] The capture efficiency R of the monitoring system for the target objects in the solid particulate matter is obtained according to the absorption efficiencies R1, R2 and the working parameters of the monitoring system.

[0035] In some embodiments, the capture efficiency R1 is calculated as:

[0036]

[0037] Wherein, L2 is the pipe volume between the first absorption bottle and the first reverse osmosis filter, L3 is the pipe volume between the first reverse osmosis filter and the first solvent bottle, when the liquid in the first absorption bottle is sent to the detection unit in the i-th cycle, V 2i is the volume of liquid delivered by the first pump in the i-th cycle, and the volume of liquid in the first absorption bottle in the i-th cycle is V 3i , the volume of the liquid in the first solvent bottle in the i-th cycle is V 4i ; L6 is the pipe volume between the second absorption bottle and the second reverse osmosis filter, L7 is the pipe volume between the second reverse osmosis filter and the second solvent bottle, when the liquid in the second absorption bottle is sent to the detection unit in the i-th cycle, V 6iis the volume of liquid delivered by the second pump in the i-th cycle, and the volume of liquid in the second absorption bottle in the i-th cycle is V 7i , the volume of the liquid in the second solvent bottle in the i-th cycle is V 8i ; When the liquid in the third absorption bottle is sent to the detection unit, the volume of the liquid in the third absorption bottle is V0.

[0038] In some embodiments, the capture efficiency R of the monitoring system for the target object in the solid particulate matter is expressed as:

[0039]

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The system and method provided by the present invention can test the capture efficiency, solving the problem of low measurement results caused by low capture efficiency. Furthermore, with the capture efficiency, the performance indicators of ion chromatography can be combined with the system capture efficiency to convert them into system performance indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. Those skilled in the art will readily appreciate that these drawings are merely used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0043] Figure 1 is a simplified structural diagram of a monitoring system according to an embodiment of the present invention;

[0044] Figure 2 FIG. 4 is another simplified structural diagram of a monitoring system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0045] Figure 1-Figure 2 The following description describes optional embodiments of the present invention to teach those skilled in the art how to implement and reproduce the present invention. In order to explain the technical solution of the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art will understand that variations or substitutions derived from these embodiments will be within the scope of the present invention. Those skilled in the art will understand that the following features can be combined in various ways to form multiple variations of the present invention. Therefore, the present invention is not limited to the following optional embodiments, but is only limited by the claims and their equivalents.

[0046] Example 1:

[0047] The embodiment of the present invention provides a system for monitoring water-soluble ions in air, such as Figure 1 Shown, including:

[0048] The cutter 11, the separator (using a dissolver) 12, the first concentration measurement pipeline, and the detection unit (an ion chromatograph is used in this embodiment) 81 are connected in sequence. The first concentration measurement pipeline includes a first pump 21, a first switching valve 31, a first absorption bottle 41, a third switching valve 33, a first reverse osmosis filter 51, a fourth pump 23, a first solvent bottle 61, and a sixth pump 25, which are connected in sequence. The first switching valve 31 is used to selectively connect the outlet of the first pump 21 to the first absorption bottle 41 or the waste liquid barrel 91, and the third switching valve 33 is used to selectively connect the outlet of the first absorption bottle 41 to the detection unit 81 or the first reverse osmosis filter 51. A ninth pump 71 and a fifth switching valve 35 are provided between the third switching valve 33 and the detection unit 81. The fifth switching valve 35 selectively connects the outlet of the ninth pump 71 to the detection unit 81 or the waste liquid barrel 91.

[0049] The sample gas passes through the cutter 11, which removes particles of a certain size. The sample gas then enters the sampling line. The water-soluble ion target in the sampling line exists in two forms in the sample gas: one in solid particles and the other as a gaseous soluble target. The absorption liquid is pumped into the dissolver by a peristaltic pump. The sample gas enters the dissolver, where it captures the soluble gaseous target into the absorption liquid, converting it into a liquid solution. The gaseous target (water-soluble ions) now dissolves in the absorption liquid. The dissolver can be either a parallel plate or spiral tube type.

[0050] A particle collection device and a second concentration measurement pipeline are connected in sequence. The particle collection device is connected to the separation device 12 and is used to collect solid particles in the sample gas that pass through the separation device 12. The second concentration measurement pipeline absorbs the solid particles to form a second portion of the target solution, which is then transported to the detection unit 81. The particle collection device includes a steam generator 82, a particle growth chamber 13, a second condenser 14, and an impactor 15, which are connected in sequence. The particle growth chamber 13 is connected to the separation device 12. The second concentration measurement pipeline includes a second pump 22, a second switching valve 32, a second absorption bottle 42, a fourth switching valve 34, a second reverse osmosis filter 52, a fifth pump 24, a second solvent bottle 62, and a seventh pump 26, which are connected in sequence. The second switching valve 32 is used to selectively connect the outlet of the second pump 22 to the second absorption bottle 42 or the waste liquid tank 91. The fourth switching valve 34 is used to selectively connect the outlet of the second absorption bottle 42 to the detection unit 81 or the second reverse osmosis filter 52. The tenth pump 72 and the sixth switching valve 36 are provided between the fourth switching valve 34 and the detection unit 81 . The sixth switching valve 36 allows the outlet of the tenth pump 72 to selectively connect to the detection unit 81 or the waste liquid tank 91 .

[0051] The exhaust gas collection line is connected to the particulate matter collection device. In the exhaust gas collection line, the gas discharged from the gas outlet of the impactor 15 enters the first condenser 16 and the eighth pump 75 through suction. The liquid outlet of the first condenser 16 is connected to the third absorption bottle 43, which is connected to the detection unit 81 via the third pump 73 and the seventh switching valve 74. The seventh switching valve 74 is used to selectively connect the outlet of the third pump 73 to the detection unit 81 or the waste liquid tank 91.

[0052] A calculation device is provided for calculating the capture efficiency based on the output result of the detection unit 81 and the parameters in the monitoring system.

[0053] The present invention also provides a capture efficiency detection method based on the monitoring system of an embodiment of the present invention, the detection method is:

[0054] S1. The sample gas passes through a separation device, a particle collection device, and an exhaust gas collection pipeline in sequence. The separation device captures the gaseous soluble target in the sample gas to form a first target solution. The particle collection device absorbs the solid particles in the sample gas to form a second target solution. The exhaust gas collection pipeline collects the residual target and water to form a third target solution.

[0055] S2. The first concentration measurement pipeline obtains the first portion of the target solution, concentrates it, and then inputs it into the detection unit;

[0056] S3, a second concentration measurement pipeline obtains the second portion of the target solution, concentrates it, and then inputs it into the detection unit;

[0057] S4, the detection unit outputs the concentration C of the solution input from the first concentration measurement pipeline in the i-th sampling period. 1i The detection unit is based on the second concentration measurement pipeline input solution within the i-th sampling period, and outputs the concentration C 2i The detection unit outputs a concentration C0 of the solution input from the tail gas collection pipeline within the 1st to Nth cycles, i = 1, 2 ... N, where N represents the number of sampling cycles after which the third part of the target solution reaches the concentration detection condition;

[0058] S5. The calculation device obtains the total capture efficiency R1 according to the concentration value output by the detection unit and the working parameters of the monitoring system.

[0059] The sampled air passes through the cutter 11 and the separator 12 in sequence. The separated gaseous pollutants enter the first concentration measurement pipeline. The separated particulate matter is sent to the particulate matter collection device. The gas discharged from the particulate matter collection device enters the exhaust gas collection pipeline.

[0060] The first concentration measurement pipeline, the second concentration measurement pipeline and the tail gas collection pipeline respectively send the absorbed soluble ion solution to the detection unit 81, and the detection unit 81 outputs the first part of the target solution measurement concentration C formed by the part of the same soluble ions belonging to gaseous pollutants in the sample gas during multiple sampling periods. 1i , the second part of the target solution measured concentration C formed by the particulate matter of the same soluble ions in the sample gas 2i , where i represents the i-th sampling period, and i = 1, 2, ..., N. Detection unit 81 also outputs the measured concentration C0 of the third target solution, formed by the tail gas portion of the same soluble ion collected in the sample gas over the first 1 to N sampling periods. The target in the tail gas, i.e., the portion not absorbed by the monitoring system, includes gaseous soluble target matter not absorbed by the separation device and target matter in solid particulate matter not absorbed by the particulate matter collection device.

[0061] The total capture efficiency R1 of the monitoring system is obtained based on the above measured concentration and the operating parameters of the monitoring system;

[0062]

[0063] The working parameters of the monitoring system include: L2 is the volume of the pipe between the first absorption bottle and the first reverse osmosis filter, L3 is the volume of the pipe between the first reverse osmosis filter and the first solvent bottle, when the liquid in the first absorption bottle is sent to the detection unit in the i-th cycle, V 2i is the volume of liquid delivered by the first pump in the i-th cycle, and the volume of liquid in the first absorption bottle in the i-th cycle is V 3i , the volume of the liquid in the first solvent bottle in the i-th cycle is V 4i ; L6 is the pipe volume between the second absorption bottle and the second reverse osmosis filter, L7 is the pipe volume between the second reverse osmosis filter and the second solvent bottle, when the liquid in the second absorption bottle is sent to the detection unit in the i-th cycle, V 6i is the volume of liquid delivered by the second pump in the i-th cycle, and the volume of liquid in the second absorption bottle in the i-th cycle is V 7i , the volume of the liquid in the second solvent bottle in the i-th cycle is V 8i ; When the liquid in the third absorption bottle is sent to the detection unit, the volume of the liquid in the third absorption bottle is V0.

[0064] Nitrate ion NO3 - For example, if N = 24, and within 24 cycles, C0 = 0.03 μg / ml and V0 = 46.7 ml are measured, the particle and gas operating data within the corresponding 24 cycles are as follows:

[0065] 24h gas data

[0066]

[0067]

[0068] 24h particulate matter data

[0069]

[0070] According to the above data, it can be concluded that R1 = 98.37%.

[0071] In some embodiments, the cutter 11 is replaced with a particle filter, or a particle filter is added before the separator 12. All solid particulate matter in the sample gas is intercepted and passed into the separator 12. The capture efficiency R2 obtained by steps S1 to S5 is then used. At this point, the particulate matter has been intercepted by the high-efficiency filter, so the measured concentration of the second portion of the target solution in the second concentration measurement line is close to 0. The system absorption efficiency R2 is essentially equivalent to the monitoring system's capture efficiency for the gaseous water-soluble ion target. N = 24, C0 = 0.0042 μg / ml, V0 = 16.4 ml. The particle and gas operating data are as follows:

[0072] 24h gas data

[0073]

[0074] 24h particulate matter data

[0075]

[0076]

[0077] According to the above data, we can conclude that R2=99.43%

[0078] The capture efficiency R of the monitoring system for the target objects in the solid particulate matter is obtained according to the absorption efficiencies R1, R2 and the working parameters of the monitoring system.

[0079]

[0080] During the detection time, when the soluble ion solution in the tail gas absorption pipeline, ie, the third part of the target solution, reaches the measurement requirement, the detection time includes the multiple sampling cycles, which is 24 sampling cycles as above.

[0081] The working mode of the first concentration measurement pipeline and the second concentration measurement pipeline is: when the liquid level in any of the first absorption bottle 41, the second absorption bottle 42, the first solvent bottle 61 and the second solvent bottle 62 reaches the set value, or reaches the preset time node, the first switching valve 31 and the second switching valve 32 are switched, so that the liquid is retained in the waste liquid bucket 91 through the switching valve. At the same time, the third switching valve 33, the fifth switching valve 35, the fourth switching valve 34 and the sixth switching valve 36 are switched, and the liquid in the first absorption bottle 41 passes through the third switching valve 33, the ninth pump 71 and the fifth switching valve 35 in turn, and enters the detection unit 81, and the liquid in the second absorption bottle 42 passes through the fourth switching valve 34, the tenth pump 72 and the sixth switching valve 36 in turn, and enters the detection unit 81.

[0082] The tail gas collection pipeline works as follows: when the liquid level in the third absorption bottle 43 reaches a set value, the seventh switching valve 74 switches, and the liquid in the third absorption bottle 43 is transported to the detection unit through the third pump 73 and the seventh switching valve 74.

[0083] The working mode of the detection unit 81 is that it can only detect the liquid transported from the first concentration measurement pipeline, the second concentration measurement pipeline and the tail gas collection pipeline in one of the selective modes.

[0084] When the system starts the analysis process, the liquid volume in the absorption bottles 41 and 42 and the solvent volume in the solvent bottles 61 and 62 can be obtained through high-precision liquid level sensors combined with the bottle body size. This is existing technology and will not be repeated here.

[0085] Example 2:

[0086] The monitoring system and method of Example 1 of the present invention differ from Example 1 in that:

[0087] like Figure 2 As shown, in the tail gas collection pipeline, the gas-liquid separation unit 17 and the eighth pump 75 are sequentially arranged downstream of the first condenser 16, and the third absorption bottle 43 is sequentially connected to the eighth switching valve 76, the third reverse osmosis filter 53, the eleventh pump 27, the third solvent bottle 63 and the twelfth pump 28.

[0088] When the liquid level in the third absorption bottle 43 reaches the set value, the liquid passes through the eighth switching valve 76 , the third pump 73 and the seventh switching valve 74 in sequence and enters the detection unit 81 .

[0089] Based on the tail gas collection pipeline of this embodiment, the absorption efficiency R1 is:

[0090]

[0091] L8 is the volume of the pipeline between the third absorption bottle and the third reverse osmosis filter.

[0092] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for detecting the capture efficiency of a water-soluble ion monitoring system in air, wherein the monitoring system comprises: a separation device for capturing gaseous soluble target matter in the input sample gas to form a first portion of the target matter solution and allowing solid particulate matter in the sample gas to pass through; A detection unit, used for analyzing the components of the input solution; a first concentration measurement pipeline, connected to the separation device and the detection unit, respectively, for obtaining the concentration of the first portion of the target solution; a particle collecting device connected to the separation device and configured to absorb the solid particles to form a second portion of the target solution; a second concentration measurement pipeline, connected to the particle collection device and the detection unit, respectively, for obtaining the concentration of the second portion of the target solution; an exhaust gas collection pipeline connected to the particulate matter collection device and the detection unit, and configured to collect the target substance remaining in the gas passing through the particulate matter collection device to form a third portion of the target substance solution, and to obtain a concentration of the third portion of the target substance solution; A calculation device, configured to calculate the capture efficiency based on the output of the detection unit and the parameters in the monitoring system; The first concentration measurement pipeline includes a first pump, a first switching valve, a first absorption bottle, a first reverse osmosis filter, and a first solvent bottle connected in sequence, the pipeline between the first absorption bottle and the first reverse osmosis filter is connected to the detection unit, and the first switching valve is used to selectively connect the outlet of the first pump to the first absorption bottle or the outside world; The second concentration measurement pipeline includes a second pump, a second switching valve, a second absorption bottle, a second reverse osmosis filter, and a second solvent bottle connected in sequence, the pipeline between the second absorption bottle and the second reverse osmosis filter is connected to the detection unit, and the second switching valve is used to selectively connect the outlet of the second pump to the second absorption bottle or the outside world; The tail gas collection pipeline includes: a first condenser and a third absorption bottle, wherein the inlet of the first condenser is connected to the gas outlet of the particle collection device, the liquid outlet of the first condenser is connected to the third absorption bottle, and the third absorption bottle is connected to the detection unit via a third pump; The detection method comprises: S1. The sample gas passes through a separation device, a particle collection device, and an exhaust gas collection pipeline in sequence. The separation device captures the gaseous soluble target in the sample gas to form a first target solution. The particle collection device absorbs the solid particles in the sample gas to form a second target solution. The exhaust gas collection pipeline collects the residual target and water to form a third target solution. S2. The first concentration measurement pipeline obtains the first portion of the target solution, concentrates it, and then inputs it into the detection unit; S3, a second concentration measurement pipeline obtains the second portion of the target solution, concentrates it, and then inputs it into the detection unit; S4, the detection unit outputs the concentration C of the solution input from the first concentration measurement pipeline in the i-th sampling period. 1i The detection unit is based on the second concentration measurement pipeline input solution within the i-th sampling period, and outputs the concentration C 2i The detection unit is based on the solution output concentration C0 of the exhaust gas collection pipeline input in the 1st to Nth cycles, i=1,2···N, N represents the number of sampling cycles after which the third part of the target solution reaches the concentration detection condition; S5. The calculation device obtains the total capture efficiency R1 according to the concentration value output by the detection unit and the operating parameters of the monitoring system; The calculation formula of capture efficiency R1 is expressed as: ； Wherein, L2 is the pipe volume between the first absorption bottle and the first reverse osmosis filter, L3 is the pipe volume between the first reverse osmosis filter and the first solvent bottle, when the liquid in the first absorption bottle is sent to the detection unit in the i-th cycle, V 2i is the volume of liquid delivered by the first pump in the i-th cycle, and the volume of liquid in the first absorption bottle in the i-th cycle is V 3i , the volume of the liquid in the first solvent bottle in the i-th cycle is V 4i ; L6 is the pipe volume between the second absorption bottle and the second reverse osmosis filter, L7 is the pipe volume between the second reverse osmosis filter and the second solvent bottle, when the liquid in the second absorption bottle is sent to the detection unit in the i-th cycle, V 6i is the volume of liquid delivered by the second pump in the i-th cycle, and the volume of liquid in the second absorption bottle in the i-th cycle is V 7i , the volume of the liquid in the second solvent bottle in the i-th cycle is V 8i ; When the liquid in the third absorption bottle is sent to the detection unit, the volume of the liquid in the third absorption bottle is V0.

2. The method according to claim 1, characterized in that The tail gas collection pipeline also includes: a third reverse osmosis filter and a third solvent bottle, the inlet of the first condenser is connected to the gas outlet of the particulate matter collection device, the liquid outlet of the first condenser is connected to the third absorption bottle, and the pipeline between the third absorption bottle and the third reverse osmosis filter is connected to the detection unit through a third pump.

3. The method according to claim 1, characterized in that The separation device includes a dissolver, the particle collection device includes a steam generator, a particle moisture absorption and growth cavity, a second condenser and an impactor connected in sequence, the particle moisture absorption and growth cavity is connected to the separation device, and the detection unit adopts an ion chromatograph.

4. The detection method according to claim 1, wherein Also includes: A particle filter is added before the separation device of the monitoring system, and the particle filter is used to intercept solid particles in the sample gas; Obtaining the gaseous soluble target matter capture efficiency R2 of the monitoring system with the particulate matter filter added through steps S1 to S5; The capture efficiency R of the monitoring system for the target objects in the solid particulate matter is obtained according to the capture efficiencies R1, R2 and the working parameters of the monitoring system.

5. The detection method according to claim 4, characterized in that The capture efficiency R of the monitoring system for the target objects in solid particles is expressed as: 。

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