Condensable particulate matter detection system

Abstract

The invention relates to the technical field of environmental protection, and discloses a condensable particulate matter detection system which is characterized in that a colorimetric detection unit is arranged, after a colorimetric reaction chip and condensable particulate matter are subjected to a specific colorimetric reaction, a probe is used for collecting spectral data of the colorimetric reaction chip; and the concentration of the condensable particulate matters is determined based on the spectral data by utilizing an analysis device, so that the condensable particulate matters can be detected online in real time. Therefore, the tedious sampling process and the sample storage and transfer process in the prior art can be avoided, so that the rapid detection of the condensable particulate matters can be realized, the timeliness of the detection result of the condensable particulate matters is improved, and the detection accuracy of the condensable particulate matters is improved.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection technologies, and particularly to a condensable particulate matter detection system. Background Art

[0002] Condensable Particulate Matter (CPM) exists in the form of gas in the high-temperature flue gas at the pollution source emission port. However, during the process of discharging into the ambient atmosphere, it quickly condenses into liquid or solid particulate matter due to the decrease in temperature and pressure. Monitoring the CPM discharged into the atmospheric environment is crucial for optimizing the production process and formulating pollution control measures.

[0003] Currently, an offline method is mostly adopted to detect the CPM discharged into the atmospheric environment. Specifically, samples are collected at the flue gas emission site and then transferred to an analysis room for physical analysis, chemical analysis, etc.

[0004] However, this detection method often involves a cumbersome sampling process, resulting in a relatively long overall detection time. At the same time, the quality and composition of the collected samples are prone to change during storage and transfer, making the detection results lack timeliness and have relatively low accuracy. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problems of long detection time, lagging detection results, and relatively low detection accuracy in the existing CPM detection technology, and to provide a condensable particulate matter detection system.

[0006] The condensable particulate matter detection system includes a sampling gun, a mixing chamber, and a colorimetric detection unit;

[0007] The colorimetric detection unit includes a colorimetric reaction chip cassette, a probe, a light-emitting device connected to the probe, and an analysis device connected to the probe. The colorimetric reaction chip cassette includes a colorimetric reaction chip;

[0008] The flue gas collected by the sampling gun is mixed with air in the mixing chamber to condense out condensable particulate matter, and then input into the colorimetric reaction chip cassette for detection;

[0009] The colorimetric reaction chip is used to perform a colorimetric reaction with the condensable particulate matter in the input mixed gas; the probe is used to direct the light emitted by the light-emitting device onto the colorimetric reaction chip and to collect the spectral data of the colorimetric reaction chip, and transmit the spectral data to the analysis device. The analysis device is used to determine the concentration of the condensable particulate matter in the mixed gas based on the spectral data.

[0010] In an embodiment of the present application, the colorimetric reaction chip cassette includes a substrate and a plurality of colorimetric reaction chips, and the plurality of colorimetric reaction chips are arranged on the substrate at intervals from each other.

[0011] In an embodiment of the present application, the colorimetric reaction chip cassette includes five colorimetric reaction chips, namely a first colorimetric reaction chip, a second colorimetric reaction chip, a third colorimetric reaction chip, a fourth colorimetric reaction chip, and a fifth colorimetric reaction chip;

[0012] The first colorimetric reaction chip is used to perform a colorimetric reaction with Cl in the condensable particulate matter - ;

[0013] The second colorimetric reaction chip is used to perform a colorimetric reaction with SO in the condensable particulate matter 4 2- ;

[0014] The third colorimetric reaction chip is used to perform a colorimetric reaction with NH in the condensable particulate matter 4 + ;

[0015] The fourth colorimetric reaction chip is used to perform a colorimetric reaction with NO in the condensable particulate matter 3 -;

[0016] The fifth colorimetric reaction chip is used to perform a colorimetric reaction with volatile organic compounds in the condensable particulate matter.

[0017] In an embodiment of the present application, the colorimetric reaction reagent in the first colorimetric reaction chip is ammonium ferric sulfate and mercuric thiocyanate.

[0018] In an embodiment of the present application, the colorimetric reaction reagent in the second colorimetric reaction chip is arsenazo-2-naphthol-3,6-disulfonic acid sodium salt.

[0019] In an embodiment of the present application, the colorimetric reaction reagent in the third colorimetric reaction chip is Nessler's reagent.

[0020] In an embodiment of the present application, the colorimetric reaction reagent in the fourth colorimetric reaction chip is N-(1-naphthyl)ethylenediamine and sulfanilamide.

[0021] In an embodiment of the present application, the volatile organic compound is n-octadecane, and the colorimetric reaction reagent in the fifth colorimetric reaction chip is methylene blue dye.

[0022] In an embodiment of the present application, the detection system further includes an air waiting chamber and a plurality of air delivery pipelines, the air waiting chamber is annular and sleeved outside the mixing chamber;

[0023] A plurality of air inlets are provided on the air waiting chamber, and the plurality of air inlets on the air waiting chamber are in one-to-one correspondence and communication with the outlets of the plurality of air delivery pipelines;

[0024] A plurality of air inlets are circumferentially provided on the mixing chamber. A plurality of air outlets are provided on one side of the air waiting chamber close to the mixing chamber. The plurality of air outlets on the air waiting chamber are in one-to-one correspondence and communication with the plurality of air inlets on the mixing chamber.

[0025] In an embodiment of the present application, the detection system further includes a second output pipeline, a third filter, and a third air extraction pump;

[0026] The inlet of the second output pipeline is in communication with the second outlet of the mixing chamber. The outlet of the second output pipeline is in communication with the inlet of the third filter. The outlet of the third filter is in communication with the inlet of the third air extraction pump.

[0027] Through the above technical solution, the condensable particulate matter detection system includes a sampling gun, a mixing chamber, and a colorimetric detection unit; the colorimetric detection unit includes a colorimetric reaction chip box, a probe, a light emitting device connected to the probe, and an analysis device connected to the probe. The colorimetric reaction chip box includes a colorimetric reaction chip; the flue gas collected by the sampling gun is mixed with air in the mixing chamber to condense condensable particulate matter and then input into the colorimetric reaction chip box for detection; the colorimetric reaction chip is used to perform a colorimetric reaction with the condensable particulate matter in the input mixed gas; the probe is used to direct the light emitted by the light emitting device to the colorimetric reaction chip and to collect the spectral data of the colorimetric reaction chip, and transmit the spectral data to the analysis device. The analysis device is used to determine the concentration of the condensable particulate matter in the mixed gas based on the spectral data. By setting up the colorimetric detection unit, after a specific colorimetric reaction occurs between the colorimetric reaction chip and the CPM, the probe is used to collect the spectral data of the colorimetric reaction chip, and the analysis device is used to determine the concentration of the CPM based on the spectral data, enabling real-time online detection of the CPM. Thus, it is possible to avoid the cumbersome sampling process and the storage and transfer processes of samples in the prior art, thereby realizing the rapid detection of the CPM, improving the timeliness of the CPM detection result, and improving the accuracy of the CPM detection.

[0028] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0029] The drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific implementation, they are used to explain the embodiments of the present application, but do not constitute a limitation to the embodiments of the present application. In the drawings:

[0030] Figure 1 Schematically shows a schematic structural diagram of a condensable particulate matter detection system according to an embodiment of the present application;

[0031] Figure 2 Schematically shows a schematic structural diagram of a colorimetric reaction chip cassette according to an embodiment of the present application;

[0032] Figure 3 Schematically shows a schematic structural diagram of another colorimetric reaction chip cassette according to an embodiment of the present application;

[0033] Figure 4 Schematically shows a schematic diagram of the color change before and after the colorimetric reaction occurs in each colorimetric reaction chip according to an embodiment of the present application;

[0034] Figure 5 Schematically shows a schematic structural diagram of an air waiting chamber and a mixing chamber according to an embodiment of the present application.

[0035] Description of reference numerals

[0036] 101 - Sampling gun; 1021 - First intake air pipeline; 1022 - Second intake air pipeline; 103 - Mixing chamber; 104 - Air delivery pipeline; 1051 - Colorimetric reaction chip cassette; 10511 - Substrate; 10512 - Colorimetric reaction chip; 10513 - Cover plate; 1052 - Probe; 1053 - Light emitting device; 10541 - Spectrometer; 10542 - Computing device; 106 - First output pipeline; 107 - First air pump; 108 - First flow meter; 109 - First filter; 110 - Second filter; 111 - Second air pump; 112 - Second flow meter; 113 - Air waiting chamber; 114 - Second output pipeline; 115 - Third filter; 116 - Third air pump. Detailed implementation manners

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0038] If the descriptions such as "first", "second", etc. are involved in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0039] As described in the background art, currently, an offline method is mostly adopted to detect CPM discharged into the atmospheric environment. Specifically, samples are collected at the flue gas emission site, and then the samples are transferred to an analysis room for physical analysis, chemical analysis, etc. However, this detection method often involves a cumbersome sampling process, resulting in a relatively long overall detection time. At the same time, the quality and composition of the collected samples are prone to change during storage and transfer, making the detection results lack timeliness and have relatively low accuracy.

[0040] In view of this, in an embodiment of the present application, a condensable particulate matter detection system is provided, as Figure 1 shown. The condensable particulate matter detection system may include a sampling gun 101, a mixing chamber 103, and a colorimetric detection unit; the colorimetric detection unit includes a colorimetric reaction chip cassette 1051, a probe 1052, a light-emitting device 1053 connected to the probe 1052, and an analysis device connected to the probe 1052. The colorimetric reaction chip cassette 1051 includes a substrate 10511, a colorimetric reaction chip 10512, and a cover plate 10513 stacked from bottom to top; the flue gas collected by the sampling gun 101 is mixed with air in the mixing chamber 103 to condense out condensable particulate matter, and then is input into the colorimetric reaction chip cassette 1051 for detection; the colorimetric reaction chip 10512 is used to perform a colorimetric reaction with the condensable particulate matter in the input mixed gas; the probe 1052 is used to direct the light emitted by the light-emitting device 1053 onto the colorimetric reaction chip 10512 and to collect the spectral data of the colorimetric reaction chip 10512, and transmit the spectral data to the analysis device, and the analysis device is used to determine the concentration of the condensable particulate matter in the mixed gas based on the spectral data.

[0041] Among them, the sampling gun 101 can be used to extract flue gas from the chimney X. Considering that the temperature of the flue gas is often relatively high, the sampling gun 101 can specifically be a high-temperature sampling gun, which can withstand the temperature of the flue gas. In specific implementation, a sampling port can be set at the outlet position of the chimney X, and the intake port of the sampling gun 101 is communicated with this sampling port to extract the flue gas. In the embodiment of the present application, the condensable particulate matter detection system can further include an intake pipeline. The output port of the sampling gun 101 is communicated with the inlet of the intake pipeline, and the outlet of the intake pipeline is communicated with the flue gas inlet of the mixing chamber 103. After the sampling gun 101 extracts the flue gas, the flue gas is further transported to the mixing chamber 103 via the intake pipeline.

[0042] In practical applications, to keep the flue gas in a gaseous state in the intake pipeline, avoid the premature condensation of CPM gaseous precursors in the intake pipeline, affect the final detection result and cause blockage of the intake pipeline, in practical applications, a heating wire can be provided on the intake pipeline to maintain the temperature of the intake pipeline at 100°C to 130°C, for example, it can be maintained at about 120°C. On the other hand, considering that high-temperature flue gas often has strong corrosiveness, to avoid corrosion of the intake pipeline, the material of the intake pipeline can be a corrosion-resistant material, such as polytetrafluoroethylene, etc.

[0043] In the embodiment of the present application, the condensable particulate matter detection system can further include an air delivery pipeline 104, and the outlet of the air delivery pipeline 104 is communicated with the air inlet of the mixing chamber 103. Among them, the air delivery pipeline 104 can be used to transport the air in the environment to the mixing chamber 103. In the mixing chamber 103, the flue gas is diluted and cooled during the mixing process with the air, and then the CPM gaseous precursors in the flue gas condense to form CPM, obtaining a gas containing CPM. It can be understood that the process of mixing the flue gas and air in the mixing chamber 103 can simulate the process of high-temperature flue gas being discharged into the ambient atmosphere and being diluted and cooled in the ambient atmosphere.

[0044] Furthermore, the first outlet of the mixing chamber 103 can be set to be communicated with the inlet of the colorimetric reaction chip box 1051, and then the gas containing CPM output from the first outlet of the mixing chamber 103 enters the colorimetric reaction chip box 1051 to be detected. For the convenience of description, the gas containing CPM output from the first outlet of the mixing chamber 103 can be called the mixed gas.

[0045] Regarding the colorimetric reaction chip box 1051, such as Figure 2As shown, after the colorimetric reaction chip 10512 is disposed on the substrate 10511 and then covered with the cover plate 10513, the colorimetric reaction chip cassette 1051 is obtained. The substrate 10511 can be used to carry the colorimetric reaction chip 10512, and the cover plate 10513 can be used to ensure the airtightness of the colorimetric reaction chip cassette 1051 when gas flows through it, preventing gas leakage, thereby avoiding affecting the final detection result and causing environmental pollution. In practical applications, the cover plate 10513 can be designed in a detachable form or a flip form, so that after the detection is completed, the cover plate 10513 can be opened to remove the reacted colorimetric reaction chip 10512 and supplement new colorimetric reaction chips 10512 for the next detection. Thus, the reuse of the colorimetric reaction chip cassette 1051 can be realized and the operation can be simplified.

[0046] Further, the area on the cover plate 10513 corresponding to the colorimetric reaction chip 10512 can be a visualization area, and the visualization area is preferably a colorless and transparent area. Thus, without opening the cover plate 10513, the probe 1052 can collect the spectral data of the colorimetric reaction chip 10512.

[0047] After the mixed gas output from the first outlet of the mixing chamber 103 enters the colorimetric reaction chip cassette 1051, the colorimetric reaction chip 10512 can be used to perform a colorimetric reaction with the CPM in the mixed gas. In the embodiment of the present application, the colorimetric reaction chip 10512 can be a liquid chip or a solid chip. When the colorimetric reaction chip 10512 is a liquid chip, a groove can be provided on the substrate 10511, and a colorimetric reaction reagent solution is placed in the groove to form a liquid chip. When the colorimetric reaction chip 10512 is a solid chip, by placing the carrier sheet in the colorimetric reaction reagent solution, the solid chip is obtained after the carrier sheet is loaded with the colorimetric reaction reagent, and then the solid chip is disposed on the substrate 10511. Among them, the carrier sheet is preferably made of a material that is easy to absorb the colorimetric reaction reagent, such as filter paper, etc.; the colorimetric reaction reagent can be selected according to the type of CPM to be specifically detected.

[0048] To achieve more comprehensive detection, in one embodiment, the colorimetric reaction chip cassette 1051 can include a plurality of colorimetric reaction chips 10512, and the plurality of colorimetric reaction chips 10512 are arranged at intervals on the substrate 10511. It can be understood that the number of colorimetric reaction chips 10512 can be set according to the number of types of CPM to be specifically detected.

[0049] In the embodiment of the present application, the light-emitting device 1053 can be used to provide a light source. The light-emitting device 1053 and the probe 1052 can be connected through an optical fiber cable, so that the probe 1052 can lead the light emitted by the light-emitting device 1053 to the colorimetric reaction chip cassette 1051 and irradiate the colorimetric reaction chip 10512. Similarly, the probe 1052 and the analysis device can also be connected through an optical fiber cable, so that the probe 1052 can transmit the collected spectral data to the analysis device.

[0050] In the embodiment of the present application, the probe 1052 can specifically be an optical fiber probe. The spectral data collected by the probe 1052 can specifically be a picture. To simplify the operation, the probe 1052 can obtain a picture containing all the colorimetric reaction chips 10512 when taking a picture of the colorimetric reaction chip cassette 1051 once, and then transmit the picture containing all the colorimetric reaction chips 10512 to the analysis device for analysis.

[0051] Further, to make the analysis result of the analysis device more accurate, the area outside the visualization area on the cover plate 10513 can be white, so as to provide a contrast for the color of the colorimetric reaction chip 10512 in the picture.

[0052] In the embodiment of the present application, the analysis device can include a spectrometer 10541 and a computing device 10542. Among them, the spectrometer 10541 is connected to the probe 1052, for example, through an optical fiber cable, to receive the spectral data sent by the probe 1052. In a specific implementation, a Y-shaped optical fiber cable can be used to realize the connection of the light-emitting device 1053, the probe 1052, and the spectrometer 10541. Specifically, the incident end a of the Y-shaped optical fiber cable is connected to the light-emitting device 1053, and the reflection end b of the Y-shaped optical fiber cable is connected to the spectrometer 10541. In practical applications, the Y-shaped optical fiber cable can specifically be of the QR600*7-VIS-NIR-1.5Y model, and both the incident end a and the reflection end b are SMA905 interfaces.

[0053] More preferably, the detection range of the spectrometer 10541 matches the spectral output range of the light-emitting device 1053, and the detection range of the spectrometer 10541 and the spectral output range of the light-emitting device 1053 also match the spectral range of the colorimetric reaction chip 10512, so as to avoid missed detection and improve the detection accuracy.

[0054] The spectrometer 10541 is further connected to a computing device 10542, for example, through a data cable, to transmit the spectral information obtained by processing the spectral data to the computing device 10542. Among them, the spectral information can be wavelength information. The computing device 10542, such as a computer, in the case where the spectral information is wavelength information, the computing device 10542 can determine the concentration of CPM in the condensate of condensable particulate matter based on the corresponding relationship between the pre-stored wavelength information and the CPM concentration. In a specific implementation, the corresponding relationship between the wavelength information and the CPM concentration can be, for example, a standard curve of the wavelength information and the CPM concentration obtained through relevant experiments in advance.

[0055] In practical applications, to avoid errors in spectral data acquisition, each colorimetric reaction chip 10512 can be photographed twice, and the spectral data obtained from the two acquisitions are analyzed separately to obtain two detection results. The final detection result takes the average of the two times. Considering that the acquired near-infrared spectral data often contains noise information, background drift, etc., in actual processing, standard normal variate transformation (SNV) can be used to analyze the acquired spectral data to eliminate the influence of surface scattering on the original near-infrared spectral data.

[0056] In the embodiment of the present application, to provide power for the extracted flue gas and enable the flue gas to flow along the path of the intake pipeline - mixing chamber 103 - colorimetric reaction chip box 1051, the condensable particulate matter detection system can further include a first output pipeline 106 and a first air pump 107. The inlet of the first output pipeline 106 is communicated with the outlet of the colorimetric reaction chip box 1051, and the outlet of the first output pipeline 106 is communicated with the inlet of the first air pump 107. Further, a first flow meter 108 can also be provided on the first output pipeline 106 to monitor the gas flow.

[0057] It can be understood that the condensable particulate matter detection system provided by the above embodiments of the present application includes a sampling gun 101, a mixing chamber 103, and a colorimetric detection unit; the colorimetric detection unit includes a colorimetric reaction chip cassette 1051, a probe 1052, a light-emitting device 1053 connected to the probe 1052, and an analysis device connected to the probe 1052. The colorimetric reaction chip cassette 1051 includes a substrate 10511, a colorimetric reaction chip 10512, and a cover plate 10513 stacked from bottom to top. After the flue gas collected by the sampling gun 101 is mixed with air in the mixing chamber 103 to condense condensable particulate matter, it is input into the colorimetric reaction chip cassette 1051 for detection. The colorimetric reaction chip 10512 is used to perform a colorimetric reaction with the condensable particulate matter in the input mixed gas. The probe 1052 is used to direct the light emitted by the light-emitting device 1053 onto the colorimetric reaction chip 10512 and to collect the spectral data of the colorimetric reaction chip 10512, and transmit the spectral data to the analysis device. The analysis device is used to determine the concentration of the condensable particulate matter in the mixed gas based on the spectral data. By setting up the colorimetric detection unit, after a specific colorimetric reaction occurs between the colorimetric reaction chip and CPM, the probe is used to collect the spectral data of the colorimetric reaction chip, and the analysis device is used to determine the concentration of CPM based on the spectral data, enabling real-time online detection of CPM. Thus, the cumbersome sampling process and the storage and transfer processes of samples in the prior art can be avoided, thereby enabling rapid detection of CPM, improving the timeliness of CPM detection results, and improving the accuracy of CPM detection.

[0058] Obviously, each time only a new colorimetric reaction chip 10512 needs to be replenished for detection, which is not only simple to operate but also has a low detection cost. Moreover, based on the specific response of the colorimetric reaction chip 10512 to CPM, the detection accuracy can also be improved. In addition, after determining the CPM concentration, the concentration of the CPM gaseous precursor in the flue gas can be determined in combination with the flow rate data.

[0059] Further, taking the colorimetric reaction chip 10512 as a solid-state chip as an example, in order to enable the CPM in the mixed gas to quickly and as completely as possible adhere to the colorimetric reaction chip 10512, as Figure 3 shown, along the flow direction of the mixed gas (such as Figure 3In the direction of the arrow (in the middle), the colorimetric reaction chip 10512 can be inclined. Specifically, the upstream end of the colorimetric reaction chip 10512 is located below the downstream end of the colorimetric reaction chip 10512. Furthermore, the colorimetric reaction chip 10512 can impose a certain block on the mixed gas flow, prompting the CPM in the mixed gas to quickly and as much as possible adhere to the colorimetric reaction chip 10512. To ensure the stability of the colorimetric reaction chip 10512, the substrate 10511 can have a raised support portion C to support the inclined setting of the colorimetric reaction chip 10512. Correspondingly, the shape of the cover plate 10513 can also be adjusted according to the shape of the substrate 10511 so that the visualization area is directly opposite to the colorimetric reaction chip 10512, thus facilitating the acquisition of spectral data of the colorimetric reaction chip 10512. Among them, Figure 3 and Figure 2 are cross-sectional views from different perspectives, Figure 2 is a cross-sectional view along the direction perpendicular to the gas flow direction, Figure 3 is a cross-sectional view along the gas flow direction.

[0060] When multiple colorimetric reaction chips 10512 are arranged on the substrate 10511, to avoid the influence between the colorimetric reaction chips 10512, multiple grooves can be formed on the substrate 10511, and one colorimetric reaction chip 10512 is correspondingly arranged in one groove. After the mixed gas enters the colorimetric reaction chip cassette 1051, it is split and enters each groove and flows to the colorimetric reaction chip 10512 arranged in each groove.

[0061] For various CPM in industrial flue gas, to enable each colorimetric reaction chip 10512 to quickly and differentially respond, in the embodiment of the present application, five colorimetric reaction chips 10512 can be arranged on the substrate 10511, namely the first colorimetric reaction chip, the second colorimetric reaction chip, the third colorimetric reaction chip, the fourth colorimetric reaction chip, and the fifth colorimetric reaction chip. Among them, the first colorimetric reaction chip is used for colorimetric reaction with Cl- in the condensable particulate matter; the second colorimetric reaction chip is used for colorimetric reaction with SO 4 2- in the condensable particulate matter; the third colorimetric reaction chip is used for colorimetric reaction with NH 4 + in the condensable particulate matter; the fourth colorimetric reaction chip is used for colorimetric reaction with NO 3 - in the condensable particulate matter; the fifth colorimetric reaction chip is used for colorimetric reaction with volatile organic compounds in the condensable particulate matter.

[0062] Then it can be understood that the colorimetric reaction reagent in the first colorimetric reaction chip is specifically a reagent capable of performing a colorimetric reaction with Cl-. The colorimetric reaction reagent in the first colorimetric reaction chip is preferably ammonium ferric sulfate and mercury thiocyanate. Cl -React with mercuric thiocyanate to form poorly ionizable mercuric dichloride molecules. The displaced thiocyanate reacts with ferric ions to form orange-red ferric thiocyanate complex ions. As the concentration of Cl - increases, the orange-red color becomes deeper.

[0063] Taking the first colorimetric reaction chip as a liquid chip as an example, in specific implementation, the ammonium ferric sulfate solution as a color developer and the mercuric thiocyanate solution as a precipitant can be mixed, and the mixed solution is added into the groove on the substrate 10511, thus obtaining the first colorimetric reaction chip. Taking the first colorimetric reaction chip as a solid chip as an example, in specific implementation, the ammonium ferric sulfate solution as a color developer and the mercuric thiocyanate solution as a precipitant can be mixed, and then the carrier sheet is immersed in the mixed solution, and the ammonium ferric sulfate and mercuric thiocyanate are loaded on the carrier sheet, thus obtaining the first colorimetric reaction chip.

[0064] In the above embodiments for preparing the first colorimetric reaction chip (including liquid chip and solid chip), the solvent of the ammonium ferric sulfate solution is perchloric acid, and the concentration of the ammonium ferric sulfate solution is 0.1 g / L to 1 g / L. For example, it can be 0.1 g / L, 0.3 g / L, 0.7 g / L, 1 g / L or any concentration between the listed concentrations. The solvent of the mercuric thiocyanate solution is absolute ethanol, and the concentration of the mercuric thiocyanate solution is 0.1 g / L to 1 g / L. For example, it can be 0.1 g / L, 0.4 g / L, 0.8 g / L, 1 g / L or any concentration between the listed concentrations. When mixing, the volume ratio of the ammonium ferric sulfate solution to the mercuric thiocyanate solution can be 4:1 to 6:1. For example, it can be 4:1, 4.5:1, 5:1, 5.5:1, 6:1 or any ratio between the listed ratios.

[0065] The colorimetric reaction reagent in the second colorimetric reaction chip is specifically a reagent capable of performing a colorimetric reaction with SO 4 2- . The colorimetric reaction reagent in the second colorimetric reaction chip is preferably the color developer arsenazo II, also known as toluidine dye. SO 4 2- reacts with toluidine dye to form a red complex. As the concentration of SO 4 2- increases, the red color becomes deeper.

[0066] Taking the second colorimetric reaction chip as a liquid chip as an example, in specific implementation, the toluidine dye solution (pH is 3.5 to 4) can be added into the groove on the substrate 10511, thus obtaining the second colorimetric reaction chip. Taking the second colorimetric reaction chip as a solid chip as an example, in specific implementation, the carrier sheet can be immersed in the toluidine dye solution (pH is 3.5 to 4), and the toluidine dye is loaded on the carrier sheet, thus obtaining the second colorimetric reaction chip.

[0067] In the above-mentioned embodiment of preparing the second colorimetric reaction chip (including liquid chip and solid chip), the solvent of the porphyrin dye solution is absolute ethanol, and the concentration of the porphyrin dye solution is 1 g / L to 5 g / L. For example, it can be 1 g / L, 2 g / L, 3 g / L, 4 g / L, 5 g / L or any concentration between the listed concentrations. Moreover, the pH of the porphyrin dye solution is adjusted to 3.5 to 4.

[0068] The colorimetric reaction reagent in the third colorimetric reaction chip is specifically a reagent capable of performing a colorimetric reaction with NH 4 + The colorimetric reaction reagent in the third colorimetric reaction chip is preferably Nessler's reagent. NH 4 + reacts with Nessler's reagent to form a light reddish-brown complex. As the concentration of NH 4 + is higher, the reddish-brown color is deeper.

[0069] Taking the third colorimetric reaction chip as a liquid chip as an example, in specific implementation, Nessler's reagent solution can be added to the groove on the substrate 10511, and thus the third colorimetric reaction chip is obtained. Taking the third colorimetric reaction chip as a solid chip as an example, in specific implementation, the carrier sheet can be immersed in Nessler's reagent solution, and Nessler's reagent is loaded on the carrier sheet, and thus the third colorimetric reaction chip is obtained.

[0070] In the above-mentioned embodiment of preparing the third colorimetric reaction chip (including liquid chip and solid chip), the Nessler's reagent solution is selected as mercury dichloride-potassium iodide-potassium hydroxide (HgCl 2 -KI-KOH) solution. The solvent of the mercury dichloride-potassium iodide-potassium hydroxide solution is water. In the mercury dichloride-potassium iodide-potassium hydroxide solution, the mass concentration of mercury dichloride is 0.2 g / L to 0.3 g / L. For example, it can be 0.2 g / L, 0.25 g / L, 0.3 g / L or any concentration between the listed concentrations; the mass concentration of potassium iodide is 0.4 g / L to 0.6 g / L. For example, it can be 0.4 g / L, 0.45 g / L, 0.5 g / L, 0.55 g / L, 0.6 g / L or any concentration between the listed concentrations; the mass concentration of potassium hydroxide is 1.4 g / L to 1.6 g / L. For example, it can be 1.4 g / L, 1.45 g / L, 1.5 g / L, 1.55 g / L, 1.6 g / L or any concentration between the listed concentrations.

[0071] The colorimetric reaction reagent in the fourth colorimetric reaction chip is specifically a reagent capable of performing a colorimetric reaction with NO 3 - The colorimetric reaction reagent in the fourth colorimetric reaction chip is preferably N-(1-naphthyl)ethylenediamine and sulfanilamide. NO 3 -It is reduced to nitrite in an alkaline reaction system, then reacts with sulfanilic acid to form a diazo compound, and finally couples with the aromatic amine N-(1-naphthyl)ethylenediamine to form a magenta azo dye. As the concentration of NO 3 - increases, the magenta color becomes deeper.

[0072] Taking the fourth colorimetric reaction chip as a liquid chip as an example, in specific implementation, the chromogenic agent N-(1-naphthyl)ethylenediamine solution and the reaction reagent sulfanilamide solution can be mixed, and the mixed solution (pH 9-12) is added to the groove on the substrate 10511 to obtain the fourth colorimetric reaction chip. Taking the fourth colorimetric reaction chip as a solid chip as an example, in specific implementation, the N-(1-naphthyl)ethylenediamine solution and the sulfanilamide solution can be mixed, and then the carrier sheet is immersed in the mixed solution (pH 9-12). The N-(1-naphthyl)ethylenediamine and sulfanilamide are loaded on the carrier sheet to obtain the fourth colorimetric reaction chip.

[0073] In the above embodiments for preparing the fourth colorimetric reaction chip (including liquid chips and paper-based chips), the solvent of the N-(1-naphthyl)ethylenediamine solution is absolute ethanol, and the concentration of the N-(1-naphthyl)ethylenediamine solution is 1 g / L to 5 g / L. For example, it can be 1 g / L, 2 g / L, 3 g / L, 4 g / L, 5 g / L or any concentration between the listed concentrations. The solvent of the sulfanilamide solution is absolute ethanol, and the concentration of the sulfanilamide solution is 1 g / L to 5 g / L. For example, it can be 1 g / L, 2 g / L, 3 g / L, 4 g / L, 5 g / L or any concentration between the listed concentrations. When mixing, the volume ratio of the N-(1-naphthyl)ethylenediamine solution to the sulfanilamide solution can be 1:1 to 1:2. For example, it can be 1:1, 1:1.3, 1:1.5, 1:1.8, 1:2 or any ratio between the listed ratios. After mixing, the pH of the solution is further adjusted to 9-12.

[0074] The volatile organic compound can specifically be n-octadecane, and the colorimetric reaction reagent in the fifth colorimetric reaction chip is specifically a reagent capable of performing a colorimetric reaction with n-octadecane. The colorimetric reaction reagent in the fifth colorimetric reaction chip is preferably methylene blue dye. N-octadecane changes the color of the methylene blue solution, making the color lighter. As the concentration of n-octadecane increases, the blue color becomes lighter.

[0075] Taking the fifth colorimetric reaction chip as a liquid chip as an example, in specific implementation, the methylene blue dye solution can be added to the groove on the substrate 10511 to obtain the fifth colorimetric reaction chip. Taking the fifth colorimetric reaction chip as a solid chip as an example, in specific implementation, the carrier sheet can be immersed in the methylene blue dye solution, and the methylene blue dye is loaded on the carrier sheet to obtain the fifth colorimetric reaction chip.

[0076] In the above-mentioned embodiment of preparing the fifth colorimetric reaction chip (including liquid chip and solid chip), the solvent of the methylene blue dye solution is absolute ethanol, and the concentration of the methylene blue dye solution is 5 g / L to 10 g / L. For example, it can be 5 g / L, 6 g / L, 8 g / L, 10 g / L or any concentration between the listed concentrations.

[0077] Before and after the colorimetric reaction occurs in the first colorimetric reaction chip, the second colorimetric reaction chip, the third colorimetric reaction chip, the fourth colorimetric reaction chip, and the fifth colorimetric reaction chip, it can be as Figure 4 shown.

[0078] To adapt the detection range of the spectrometer 10541 and the spectral output range of the light-emitting device 1053 to the spectral range of each colorimetric reaction chip 10512, the spectrometer 10541 can specifically be a NIR Quest512 type spectrometer, with a detection range of 899.20 nm - 1724.71 nm. The light-emitting device 1053 can specifically be a tungsten halogen light source, with a spectral output of 360 nm - 2400 nm. The light-emitting device 1053 being a tungsten halogen light source can also ensure stable output of the light source.

[0079] To further improve the accuracy of the detection results, in one embodiment, the intake pipeline includes a first intake pipeline 1021 and a second intake pipeline 1022. The condensable particulate matter detection system provided in the above-mentioned embodiment of the present application further includes a first filter 109. The output port of the sampling gun 101 is communicated with the inlet of the first intake pipeline 1021. The outlet of the first intake pipeline 1021 is communicated with the inlet of the first filter 109. The outlet of the first filter 109 is communicated with the inlet of the second intake pipeline 1022. The outlet of the second intake pipeline 1022 is communicated with the flue gas inlet of the mixing chamber 103. Among them, the first filter 109 can be used to filter filterable particulate matter (FPM) in the flue gas. In practical applications, the first filter 109 can adopt a glass fiber filter cartridge, and the interception efficiency of the glass fiber filter cartridge for PM 0.3 can reach more than 99.95%. The size of the glass fiber filter cartridge can be, for example, Φ28*70 mm.

[0080] It can be understood that by adopting the above solution, by setting the first filter 109 to filter FPM in the flue gas before the flue gas enters the mixing chamber 103 to mix with the ambient air, the influence of FPM on the detection results of CPM can be avoided, thereby further improving the accuracy of the detection results.

[0081] Similarly, to avoid the influence of particulate matter in ambient air on the detection result of CPM, the condensable particulate matter detection system provided in the above embodiments of the present application further includes a second filter 110, and the outlet of the second filter 110 is communicated with the inlet of the air delivery pipeline 104. Wherein, the second filter 110 can be used to filter particulate matter in the air and further deliver the purified air to the mixing chamber 103 via the air delivery pipeline 104.

[0082] To provide power for extracting ambient air and monitor the air flow rate, the condensable particulate matter detection system may further include a second air pump 111 and a second flow meter 112. The inlet of the first air pump 111 is used to introduce air, the outlet of the first air pump 111 is communicated with the inlet of the second filter 110, and the first flow meter 112 is arranged on the outlet pipeline of the second filter 110.

[0083] In practical applications, to enable the flue gas and air in the mixing chamber 103 to be fully and evenly mixed, as Figure 1 and Figure 5 ( Figure 5 for split view) shown, in one embodiment, the number of air delivery pipelines 104 is multiple, and the condensable particulate matter detection system further includes an air waiting chamber 113. The air waiting chamber 113 is annular and sleeved outside the mixing chamber 103; a plurality of air inlets are arranged on the air waiting chamber 113, and the plurality of air inlets on the air waiting chamber 113 are in one-to-one correspondence and communication with the outlets of the plurality of air delivery pipelines 104; a plurality of air inlets M are arranged on the mixing chamber 103 in the circumferential direction, a plurality of air outlets N are arranged on the side of the air waiting chamber 113 close to the mixing chamber 103, and the plurality of air outlets N on the air waiting chamber 113 are in one-to-one correspondence and communication with the plurality of air inlets M on the mixing chamber 103.

[0084] By providing a plurality of air inlets M in the circumferential direction of the mixing chamber 103 and making the plurality of air outlets N on the air waiting chamber 113 in one-to-one correspondence and communication with the plurality of air inlets M on the mixing chamber 103, air can be input into the mixing chamber 103 along the circumferential direction of the mixing chamber 103, forming a relatively uniform and stable annular air diffusion area in the mixing chamber 103, so that the flue gas can come into full contact with the air after entering the mixing chamber 103.

[0085] In specific implementation, multiple air delivery pipelines 104 are preferably symmetrically arranged, so that the annular air diffusion area in the mixing chamber 103 can be more uniform. In addition, the air waiting chamber 113 is preferably sleeved at one end of the mixing chamber 103 close to the flue gas inlet. Further, along the flue gas flow direction, the mixing chamber 103 is sequentially divided into three sections, namely a pre-mixing section, a full-mixing section, and a uniform-mixing section. Among them, the pre-mixing section corresponds to the annular air diffusion area, the full-mixing section corresponds to the middle section of the mixing chamber 103, and the uniform-mixing section corresponds to the end section of the mixing chamber 103. In the pre-mixing section, after the flue gas and air are in full contact for preliminary mixing, they are further fully mixed in the middle section of the mixing chamber 103 until they are uniformly mixed in the end section of the mixing chamber 103 and then transported to the colorimetric reaction chip cassette 1051.

[0086] It can be understood that through the above solution, after the flue gas enters the mixing chamber 103, it can be in full contact with the air, and then subsequent full and uniform mixing can be achieved to dilute and cool the flue gas. Thus, the mixing process in the mixing chamber 103 is more in line with the process of the high-temperature flue gas being discharged into the ambient atmosphere and being diluted and cooled in the ambient atmosphere. Therefore, the CPM detection result of the subsequent condensable particulate matter detection system can more accurately reflect the real situation of the high-temperature flue gas being discharged into the ambient atmosphere.

[0087] To further accurately simulate the process of the high-temperature flue gas being discharged into the ambient atmosphere and being diluted and cooled in the ambient atmosphere, the condensable particulate matter detection system may further include a second output pipeline 114, a third filter 115, and a third air pump 116. The inlet of the second output pipeline 114 is communicated with the second outlet of the mixing chamber 103, the outlet of the second output pipeline 114 is communicated with the inlet of the third filter 115, and the outlet of the third filter 115 is communicated with the inlet of the third air pump 116.

[0088] Among them, the third air pump 116 can be used to provide power for extracting the mixed gas from the mixing chamber 103 to maintain the pressure balance in the mixing chamber 103. The third filter 115 can be used to filter the CPM in the mixed gas to reduce environmental pollution. A third flow meter 117 may further be provided on the second output pipeline 114 to monitor the flow rate.

[0089] The colorimetric reaction chip in the solution of the present application will be described below in conjunction with specific embodiments. It should be understood that the following embodiments are only some specific implementation manners and do not represent improper limitations on the solution of the present application.

[0090] Embodiment 1

[0091] Preparation of the first colorimetric reaction chip: The solvent of the ammonium ferric sulfate solution is perchloric acid, and the concentration of the ammonium ferric sulfate solution is 0.3 g / L; the solvent of the mercuric thiocyanate solution is absolute ethanol, and the concentration of the mercuric thiocyanate solution is 0.4 g / L; the ammonium ferric sulfate solution and the mercuric thiocyanate solution are mixed, and the volume ratio is 5:1. The mixed solution is added to the groove on the substrate to obtain the first colorimetric reaction chip.

[0092] Preparation of the second colorimetric reaction chip: The solvent of the porphyrin dye solution is absolute ethanol, the concentration of the porphyrin dye solution is 2 g / L, and the pH of the porphyrin dye solution is adjusted to 3.5. The porphyrin dye solution is added to the groove on the substrate to obtain the second colorimetric reaction chip.

[0093] Preparation of the third colorimetric reaction chip: The solvent of the mercuric dichloride - potassium iodide - potassium hydroxide solution is water. In the mercuric dichloride - potassium iodide - potassium hydroxide solution, the mass concentration of mercuric dichloride is 0.25 g / L, the mass concentration of potassium iodide is 0.5 g / L, and the mass concentration of potassium hydroxide is 1.5 g / L. The mercuric dichloride - potassium iodide - potassium hydroxide solution is added to the groove on the substrate to obtain the third colorimetric reaction chip.

[0094] Preparation of the fourth colorimetric reaction chip: The solvent of the N-(1-naphthyl)ethylenediamine solution is absolute ethanol, and the concentration of the N-(1-naphthyl)ethylenediamine solution is 5 g / L; the solvent of the sulfanilamide solution is absolute ethanol, and the concentration of the sulfanilamide solution is 5 g / L; the N-(1-naphthyl)ethylenediamine solution and the sulfanilamide solution are mixed, and the volume ratio is 1:1, and the pH of the mixed solution is adjusted to 10. The mixed solution is added to the groove on the substrate to obtain the fourth colorimetric reaction chip.

[0095] Preparation of the fifth colorimetric reaction chip: The solvent of the methylene blue dye solution is absolute ethanol, and the concentration of the methylene blue dye solution is 6 g / L. The methylene blue dye solution is added to the groove on the substrate to obtain the fifth colorimetric reaction chip.

[0096] Example 2

[0097] Preparation of the first colorimetric reaction chip: The solvent of the ammonium ferric sulfate solution is perchloric acid, and the concentration of the ammonium ferric sulfate solution is 0.5 g / L; the solvent of the mercuric thiocyanate solution is absolute ethanol, and the concentration of the mercuric thiocyanate solution is 0.5 g / L; the ammonium ferric sulfate solution and the mercuric thiocyanate solution are mixed, and the volume ratio is 4.5:1. The mixed solution is added to the groove on the substrate to obtain the first colorimetric reaction chip.

[0098] Preparation of the second colorimetric reaction chip: The solvent of the porphyrin dye solution is absolute ethanol, the concentration of the porphyrin dye solution is 3 g / L, and the pH of the porphyrin dye solution is adjusted to 4. The porphyrin dye solution is added to the groove on the substrate to obtain the second colorimetric reaction chip.

[0099] Preparing the third colorimetric reaction chip: The solvent of the mercuric chloride-potassium iodide-potassium hydroxide solution is water. In the mercuric chloride-potassium iodide-potassium hydroxide solution, the mass concentration of mercuric chloride is 0.3 g / L, the mass concentration of potassium iodide is 0.4 g / L, and the mass concentration of potassium hydroxide is 1.6 g / L. Adding the mercuric chloride-potassium iodide-potassium hydroxide solution into the groove on the substrate, and the third colorimetric reaction chip is obtained.

[0100] Preparing the fourth colorimetric reaction chip: The solvent of the N-(1-naphthyl)ethylenediamine solution is absolute ethanol, and the concentration of the N-(1-naphthyl)ethylenediamine solution is 3 g / L; the solvent of the sulfanilamide solution is absolute ethanol, and the concentration of the sulfanilamide solution is 3 g / L; mixing the N-(1-naphthyl)ethylenediamine solution and the sulfanilamide solution, with a volume ratio of 1:1.5, and adjusting the pH of the mixed solution to 12. Adding the mixed solution into the groove on the substrate, and the fourth colorimetric reaction chip is obtained.

[0101] Preparing the fifth colorimetric reaction chip: The solvent of the methylene blue dye solution is absolute ethanol, and the concentration of the methylene blue dye solution is 8 g / L. Adding the methylene blue dye solution into the groove on the substrate, and the fifth colorimetric reaction chip is obtained.

[0102] It should also be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, commodity or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, commodity or device including the element.

[0103] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A condensable particulate matter detection system, characterized in that: The detection system includes a sampling gun, a mixing chamber and a colorimetric detection unit; The colorimetric detection unit comprises a colorimetric reaction chip box, a probe, a light emitting device connected to the probe, and an analysis device connected to the probe, wherein the colorimetric reaction chip box comprises a colorimetric reaction chip; The smoke collected by the sampling gun is mixed with air in the mixing chamber to condense condensable particles, and then input into the colorimetric reaction chip box for detection; The colorimetric reaction chip is used to perform a colorimetric reaction with condensable particulate matter in the input mixed gas; the probe is used to guide the light emitted by the light-emitting device to the colorimetric reaction chip and to collect spectral data of the colorimetric reaction chip, and transmit the spectral data to the analysis device, and the analysis device is used to determine the concentration of condensable particulate matter in the mixed gas based on the spectral data.

2. The condensable particle detection system according to claim 1, characterized in that: The colorimetric reaction chip box comprises a substrate and a plurality of colorimetric reaction chips, and the plurality of colorimetric reaction chips are arranged on the substrate at intervals from each other.

3. The condensable particle detection system according to claim 2, characterized in that: The colorimetric reaction chip box includes five colorimetric reaction chips, namely a first colorimetric reaction chip, a second colorimetric reaction chip, a third colorimetric reaction chip, a fourth colorimetric reaction chip and a fifth colorimetric reaction chip; The first colorimetric reaction chip is used to react with Cl in the condensable particulate matter. - Perform a colorimetric reaction; The second colorimetric reaction chip is used to react with SO4 in condensable particulate matter. 2- Perform a colorimetric reaction; The third colorimetric reaction chip is used to react with NH4 + Perform a colorimetric reaction; The fourth colorimetric reaction chip is used to react with NO3 in the condensable particulate matter. - Perform a colorimetric reaction; The fifth colorimetric reaction chip is used to perform a colorimetric reaction with volatile organic compounds in condensable particulate matter.

4. The condensable particle detection system according to claim 3, characterized in that: The colorimetric reaction reagents in the first colorimetric reaction chip are ammonium ferric sulfate and mercuric thiocyanate.

5. The condensable particle detection system according to claim 3, characterized in that: The colorimetric reaction reagent in the second colorimetric reaction chip is sodium azo-2-naphthol-3,6-disulfonate of o-phenylarsonic acid.

6. The condensable particle detection system according to claim 3, characterized in that: The colorimetric reaction reagent in the third colorimetric reaction chip is Nessler's reagent.

7. The condensable particle detection system according to claim 3, characterized in that: The colorimetric reaction reagents in the fourth colorimetric reaction chip are N-(1-naphthyl)ethylenediamine and p-aminobenzenesulfonamide.

8. The condensable particulate matter detection system according to claim 3, characterized in that the volatile organic compound is n-octadecane, and the colorimetric reaction reagent in the fifth colorimetric reaction chip is methylene blue dye.

9. The condensable particle detection system according to claim 1, characterized in that: The detection system also includes an air waiting chamber and a plurality of air delivery pipelines, wherein the air waiting chamber is annular and is sleeved outside the mixing chamber; The air waiting chamber is provided with a plurality of air inlets, and the plurality of air inlets on the air waiting chamber are connected to the outlets of the plurality of air delivery pipelines in a one-to-one correspondence; The mixing chamber is provided with a plurality of air inlets along the circumferential direction, and a plurality of air outlets are provided on a side of the air waiting chamber close to the mixing chamber. The plurality of air outlets on the air waiting chamber are connected with the plurality of air inlets on the mixing chamber in a one-to-one correspondence.

10. The condensable particle detection system according to claim 1, characterized in that: The detection system also includes a second output pipeline, a third filter and a third air pump; The inlet of the second output pipeline is communicated with the second outlet of the mixing chamber, the outlet of the second output pipeline is communicated with the inlet of the third filter, and the outlet of the third filter is communicated with the inlet of the third suction pump.

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