Condensable particulate matter detection system and control method thereof

Abstract

The invention relates to the technical field of environmental protection, and discloses a condensable particulate matter detection system and a control method thereof.By arranging a colorimetric detection unit, after a colorimetric reaction chip and condensable particulate matter are subjected to a specific colorimetric reaction, spectral data of the colorimetric reaction chip are collected through a probe; 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 complicated laboratory analysis 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 and a control method for 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 rapidly condenses into liquid or solid particulate matter due to the decrease in temperature and pressure. Monitoring CPM is crucial for optimizing production processes and formulating pollution control measures.

[0003] Currently, an offline method is mostly used to detect CPM. Specifically, CPM samples are collected at the flue gas emission site, and then the CPM samples are transferred to an analysis room, and the weight method or the instrument detection method is used to determine the concentration of CPM in the CPM samples.

[0004] However, the above detection method involves a complex laboratory analysis process, resulting in a relatively long overall detection time. At the same time, the collected CPM samples are prone to changes in quality and composition during storage and transfer, making the detection results lack timeliness and have 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 low detection accuracy in the existing CPM detection technology, and to provide a condensable particulate matter detection system and its control method.

[0006] In the first aspect of the embodiments of the present application, a condensable particulate matter detection system is provided, including a sampling gun, a condenser, and a colorimetric detection unit;

[0007] 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;

[0008] After the flue gas collected by the sampling gun is condensed by the condenser to obtain a condensable particulate matter condensate, the condensable particulate matter condensate is input into the colorimetric reaction chip box for detection;

[0009] The colorimetric reaction chip is used to perform a colorimetric reaction with the condensable particulate matter in the input condensable particulate matter condensate; 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 to 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 condensable particulate matter condensate 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.

[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 4 2- in the condensable particulate matter;

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

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

[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 o-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 a liquid collection tank and a gas storage tank;

[0023] The flue gas outlet of the condenser is communicated with the first inlet of the liquid collection tank, and the first outlet of the liquid collection tank is communicated with the inlet of the colorimetric reaction chip cassette;

[0024] The outlet of the gas storage tank is communicated with the second inlet of the liquid collection tank.

[0025] A second aspect of the embodiments of the present application provides a control method for controlling the condensable particulate matter detection system of the first aspect. The control method includes:

[0026] Controlling the sampling gun to extract flue gas and introducing the flue gas into the condenser;

[0027] After condensing to obtain condensable particulate matter condensate, controlling to input a preset volume of condensable particulate matter condensate into the colorimetric reaction chip cassette for detection.

[0028] Through the above technical solution, the condensable particulate matter detection system includes a sampling gun, a condenser and a colorimetric detection unit; 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; after the flue gas collected by the sampling gun is condensed by the condenser to obtain condensable particulate matter condensate, the condensable particulate matter condensate is input into the colorimetric reaction chip cassette for detection; the colorimetric reaction chip is used for performing a colorimetric reaction with the condensable particulate matter in the input condensable particulate matter condensate; the probe is used for guiding the light emitted by the light emitting device to the colorimetric reaction chip and for collecting the spectral data of the colorimetric reaction chip, and transmitting the spectral data to the analysis device, and the analysis device is used for determining the concentration of the condensable particulate matter in the condensable particulate matter condensate based on the spectral data. By setting 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, so that real-time online detection of CPM can be achieved. Thus, the complex laboratory analysis process and the sample storage and transfer processes 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.

[0029] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0030] The accompanying 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 embodiments, 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 accompanying drawings:

[0031] Figure 1 Schematically shows a structural schematic diagram of a condensable particulate matter detection system according to an embodiment of the present application;

[0032] Figure 2 Schematically shows a structural schematic diagram of a colorimetric reaction chip cassette according to an embodiment of the present application;

[0033] Figure 3A and Figure 3B Schematically shows a structural schematic diagram of another colorimetric reaction chip cassette according to an embodiment of the present application;

[0034] Figure 4A and Figure 4B Schematically shows a structural schematic diagram of yet another colorimetric reaction chip cassette according to an embodiment of the present application;

[0035] Figure 5 Schematically shows a schematic flow diagram of a control method for a condensable particulate matter detection system according to an embodiment of the present application;

[0036] Figure 6 Schematically shows a schematic flow diagram of a control method for another condensable particulate matter detection system according to an embodiment of the present application.

[0037] Description of reference numerals

[0038] 101 - Sampling gun; 102 - Condenser; 1031 - Colorimetric reaction chip cassette; 10311 - Substrate; 10312 - Colorimetric reaction chip; 10313 - Cover plate; 1032 - Probe; 1033 - Light-emitting device; 10341 - Spectrometer; 10342 - Computing device; 104 - Inlet gas pipeline; 105 - Liquid collection tank; 106 - First air pump; 107 - Total condensate output pipeline; 108 - Condensate output branch pipeline; 109 - First filter; 110 - Cooling water tank; 111 - Cooling water pump; 112 - Gas storage tank; 113 - Acetone storage tank; 114 - Hexane storage tank; 115 - Deionized water storage tank; 116 - Air input pipeline; 117 - Second filter; 118 - Air compressor; 119 - Acetone liquid pump; 120 - Hexane liquid pump; 121 - Deionized water liquid pump. Specific embodiments

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. It should be understood that the specific embodiments described herein are only for explaining and illustrating the embodiments of this application, and are not used to limit the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0040] If there are descriptions involving "first", "second", etc. in the embodiments of this application, such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. 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 this application.

[0041] As described in the background art, currently, the off-line method is mostly used to detect CPM. Specifically, CPM samples are collected at the flue gas emission site, and then the CPM samples are transferred to the analysis room, and the weight method or the instrument detection method is used to determine the concentration of CPM in the CPM samples. However, these detection methods involve complex laboratory analysis processes, resulting in a relatively long overall detection time. At the same time, the quality and composition of the collected CPM samples are prone to change during storage and transfer, making the detection results lack timeliness and have low accuracy.

[0042] In response to this, an embodiment of this application provides a condensable particulate matter detection system, such as Figure 1As shown in the figure, the condensable particulate matter detection system may include a sampling gun 101, a condenser 102, and a colorimetric detection unit; the colorimetric detection unit includes a colorimetric reaction chip cartridge 1031, a probe 1032, a light-emitting device 1033 connected to the probe, and an analysis device connected to the probe. The colorimetric reaction chip cartridge 1031 includes a substrate 10311, a colorimetric reaction chip 10312, and a cover plate 10313 stacked from bottom to top. After the flue gas collected by the sampling gun 101 is condensed by the condenser 102 to obtain condensable particulate matter condensate, the condensable particulate matter condensate is input into the colorimetric reaction chip cartridge 1031 for detection. The colorimetric reaction chip 10311 is used to perform a colorimetric reaction with the condensable particulate matter in the input condensable particulate matter condensate. The probe 1032 is used to direct the light emitted by the light-emitting device 1033 onto the colorimetric reaction chip 10312 and to collect the spectral data of the colorimetric reaction chip 10312, 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 condensable particulate matter condensate based on the spectral data.

[0043] 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 that can withstand the temperature of the flue gas. In a specific implementation, a sampling port can be set at the outlet position of the chimney X, and the air inlet of the sampling gun 101 is communicated with the sampling port to extract the flue gas.

[0044] In the embodiment of the present application, the condensable particulate matter detection system may further include an intake pipeline 104. The output port of the sampling gun 101 is communicated with the inlet of the intake pipeline 104, and the outlet of the intake pipeline 104 is communicated with the flue gas inlet of the condenser 102. After the sampling gun 101 extracts the flue gas, the flue gas is further transported to the condenser 102 via the intake pipeline 104.

[0045] To keep the flue gas in a gaseous state in the intake pipeline 104, avoid the premature condensation of CPM gaseous precursors in the intake pipeline 104, affect the final detection result, and cause blockage of the intake pipeline 104, in practical applications, a heating wire can be provided on the intake pipeline 104 to maintain the temperature of the intake pipeline 104 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 104, the material of the intake pipeline 104 can be a corrosion-resistant material, such as polytetrafluoroethylene, etc.

[0046] In the condenser 102, the temperature of the flue gas drops rapidly. The CPM gaseous precursors in the flue gas condense to form CPM. At the same time, the water vapor in the flue gas condenses to form liquid water droplets. The CPM and the liquid water droplets form condensable particulate matter condensate droplets. Then, the other uncondensed gases in the flue gas carry the condensable particulate matter condensate droplets and discharge them from the flue gas outlet of the condenser 102. It can be understood that the process of flue gas condensation in the condenser 102 can simulate the process of the hot flue gas being cooled after emission. For the convenience of description, the gas containing condensable particulate matter condensate droplets discharged from the flue gas outlet of the condenser 102 can be called the mixed gas.

[0047] In order to enable the colorimetric reaction chip cassette 1031 to specifically detect the condensable particulate matter condensate in the mixed gas and improve the accuracy of the detection result, in the embodiment of the present application, the condensable particulate matter detection system may further include a liquid collection tank 105. The flue gas outlet of the condenser 102 is communicated with the first inlet of the liquid collection tank 105, and the first outlet of the liquid collection tank 105 is communicated with the inlet of the colorimetric reaction chip cassette 1031.

[0048] Among them, the liquid collection tank 105 can be used to enrich the condensable particulate matter condensate droplets in the mixed gas. Then, the condensable particulate matter condensate droplets in the mixed gas are separated from the other uncondensed gases. The condensable particulate matter condensate droplets are enriched to form condensable particulate matter condensate, which accumulates at the bottom of the liquid collection tank 105, and the other uncondensed gases are separated and discharged from the second outlet of the liquid collection tank 105. In specific implementation, for the convenience of supplying the condensable particulate matter condensate to the colorimetric reaction chip cassette 1031 for detection, the first outlet of the liquid collection tank 105 can be arranged at the bottom of the liquid collection tank 105. For the convenience of discharging the other uncondensed gases, the second outlet of the liquid collection tank 105 can be arranged at the top of the liquid collection tank 105.

[0049] Furthermore, in order to enable the liquid collection tank 105 to quickly discharge the other uncondensed gases, reduce the influence of gas dissolution on the detection result, and provide power for extracting the flue gas to enable the flue gas to flow along the path of the intake pipeline 104 - condenser 102 - liquid collection tank 105, the condensable particulate matter detection system may further include a first air extraction pump 106. The second outlet of the liquid collection tank 105 is communicated with the inlet of the first air extraction pump 106. It can be understood that the first air extraction pump 106 can not only provide power for the sampling gun 101 to extract the flue gas, but also quickly extract the gas in the liquid collection tank 105, reduce the dissolution of the gas in the condensable particulate matter condensate, thereby further improving the detection result.

[0050] Regarding the colorimetric reaction chip cassette 1031, as Figure 2As shown in the figure, after the colorimetric reaction chip 10312 is disposed on the substrate 10311, and then the cover plate 10313 is covered, the colorimetric reaction chip cartridge 1031 is obtained. The substrate 10311 can be used to carry the colorimetric reaction chip 10312, and the cover plate 10313 can be used to ensure the tightness of the colorimetric reaction chip cartridge 1031 when the condensable particulate condensate flows through the colorimetric reaction chip cartridge 1031, preventing the condensable particulate condensate from leaking, and thus avoiding affecting the final detection result. In practical applications, the cover plate 10313 can be designed to be detachable or in the form of a flip cover, so that after the detection is completed, the cover plate 10313 can be opened, the reacted colorimetric reaction chip 10312 can be removed, and a new colorimetric reaction chip 10312 can be added for the next detection. Thus, the colorimetric reaction chip cartridge 1031 can be reused, and the operation can be simplified.

[0051] Furthermore, the area on the cover plate 10313 corresponding to the colorimetric reaction chip 10312 can be a visualization area, and the visualization area is preferably a colorless and transparent area. Thus, without opening the cover plate 10313, the probe 1032 can collect the spectral data of the colorimetric reaction chip 10312.

[0052] After the condensable particulate condensate output from the first outlet of the liquid collection tank 105 enters the colorimetric reaction chip cartridge 1031, the colorimetric reaction chip 10312 can be used to perform a colorimetric reaction with the CPM in the condensable particulate condensate. In the embodiment of the present application, the colorimetric reaction chip 10312 can be a liquid chip or a solid chip. When the colorimetric reaction chip 10312 is a liquid chip, a groove can be provided on the substrate 10311, and a colorimetric reaction reagent solution is placed in the groove to form a liquid chip. When the colorimetric reaction chip 10312 is a solid chip, by placing the carrier sheet in the colorimetric reaction reagent solution, after the carrier sheet is loaded with the colorimetric reaction reagent, a solid chip is obtained, and then the solid chip is disposed on the substrate 10311. 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.

[0053] To achieve more comprehensive detection, in one embodiment, the colorimetric reaction chip cartridge 1031 can include a plurality of colorimetric reaction chips 10312, and the plurality of colorimetric reaction chips 10312 are arranged at intervals on the substrate 10311. It can be understood that the number of colorimetric reaction chips 10312 can be set according to the number of types of CPM to be specifically detected.

[0054] For the convenience of realizing the automatic and on-line detection of condensable particulate matter condensate, the condensable particulate matter detection system may further include a condensate output main pipeline 107 and a condensate output branch pipeline 108. The inlet of the condensate output main pipeline 107 is communicated with the first outlet of the liquid collection tank 105. The inlet of the condensate output branch pipeline 108 is communicated with the first position A of the condensate output branch pipeline 108. The outlet of the condensate output branch pipeline 108 is communicated with the inlet of the colorimetric reaction chip box 1031.

[0055] When it is necessary to supply the condensable particulate matter condensate in the liquid collection tank 105 to the colorimetric reaction chip box 1031 for detection, the condensate output branch pipeline 108 can be opened, and a certain amount (such as 2 ml to 5 ml) of condensable particulate matter condensate can be input into the colorimetric reaction chip box 1031 via the pipe section of the condensate output main pipeline 107 upstream of the first position A and the condensate output branch pipeline 108. The remaining condensable particulate matter condensate in the liquid collection tank 105 can be discharged through the condensate output main pipeline 107.

[0056] In the embodiment of the present application, the light emitting device 1033 can be used to provide a light source. The light emitting device 1033 and the probe 1032 can be connected by an optical fiber cable, so that the probe 1032 can lead the light emitted by the light emitting device 1033 to the colorimetric reaction chip box 1031 and irradiate on the colorimetric reaction chip 10312. Similarly, the probe 1032 and the analysis device can also be connected by an optical fiber cable, so that the probe 1032 can transmit the collected spectral data to the analysis device.

[0057] In the embodiment of the present application, the probe 1032 can specifically be an optical fiber probe. The spectral data collected by the probe 1032 can specifically be a picture. For simplicity of operation, the probe 1032 can obtain a picture containing all the colorimetric reaction chips 10312 when taking a picture of the colorimetric reaction chip box 1031 once, and then transmit the picture containing all the colorimetric reaction chips 10312 to the analysis device for analysis.

[0058] Furthermore, to make the analysis result of the analysis device more accurate, the area outside the visualization area on the cover plate 10313 can be white, so as to provide a contrast for the color of the colorimetric reaction chip 10312 in the picture.

[0059] In an embodiment of the present application, the analysis device may include a spectrometer 10341 and a computing device 10342. Among them, the spectrometer 10341 is connected to the probe 1032, for example, through an optical fiber cable, to receive the spectral data sent by the probe 1032. In specific implementation, a Y-shaped optical fiber cable can be used to connect the light-emitting device 1033, the probe 1032, and the spectrometer 10341. Specifically, the incident end a of the Y-shaped optical fiber cable is connected to the light-emitting device 1033, and the reflected end b of the Y-shaped optical fiber cable is connected to the spectrometer 10341. 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 reflected end b are SMA905 interfaces.

[0060] More preferably, the detection range of the spectrometer 10341 matches the spectral output range of the light-emitting device 1033, and the detection range of the spectrometer 10341 and the spectral output range of the light-emitting device 1033 also match the spectral range of the colorimetric reaction chip 10312, thereby avoiding missed detections and improving detection accuracy.

[0061] The spectrometer 10341 is further connected to the computing device 10342, for example, through a data cable, to transmit the spectral information obtained by processing the spectral data to the computing device 10342. Among them, the spectral information can be wavelength information. The computing device 10342, for example, is a computer. When the spectral information is wavelength information, the computing device 10342 can determine the concentration of CPM in the condensable particulate condensate based on the corresponding relationship between the wavelength information stored in advance and the CPM concentration. In 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.

[0062] In practical applications, to avoid errors in spectral data acquisition, each colorimetric reaction chip 10312 can be photographed twice, and the spectral data obtained from the two acquisitions are analyzed separately to obtain two detection results, and the final detection result is 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.

[0063] 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 condenser 102, and a colorimetric detection unit; the colorimetric detection unit includes a colorimetric reaction chip cassette 1031, a probe 1032, a light-emitting device 1033 connected to the probe, and an analysis device connected to the probe. The colorimetric reaction chip cassette 1031 includes a substrate 10311, a colorimetric reaction chip 10312, and a cover plate 10313 stacked from bottom to top; after the flue gas collected by the sampling gun 101 is condensed by the condenser 102 to obtain a condensable particulate matter condensate, the condensable particulate matter condensate is input into the colorimetric reaction chip cassette 1031 for detection; the colorimetric reaction chip 10311 is used to perform a colorimetric reaction with the condensable particulate matter in the input condensable particulate matter condensate; the probe 1032 is used to direct the light emitted by the light-emitting device 1033 onto the colorimetric reaction chip 10312 and to collect the spectral data of the colorimetric reaction chip 10312, 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 condensable particulate matter condensate 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, it is possible to avoid the complex laboratory analysis process and the storage and transfer process of samples in the prior art, thereby realizing the rapid detection of CPM, improving the timeliness of CPM detection results, and improving the accuracy of CPM detection.

[0064] Obviously, each time only a new colorimetric reaction chip 10312 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 10312 to CPM, the detection accuracy can also be improved. In addition, after determining the CPM concentration, the concentration of the gaseous precursor of CPM in the flue gas can be further determined by combining data such as the volume of the flue gas extracted during this detection.

[0065] In practical applications, to enable the colorimetric reaction chip 10312 to fully contact the condensable particulate matter condensate, as Figure 3A and Figure 3B shown ( Figure 2 is a cross-sectional view perpendicular to the liquid flow direction, Figure 3A is a cross-sectional view along the liquid flow direction), in the colorimetric reaction chip cassette 1031, along the flow direction of the condensable particulate matter condensate (such as Figure 3AIn the direction of the arrow (in the figure), the thickness of the substrate 10311 gradually decreases, forming a slope for the flow of the condensable particulate matter condensate, and a retention area for the condensable particulate matter condensate is formed near the outlet. This retention area corresponds to the position where the thickness of the substrate 10311 is the smallest, and the colorimetric reaction chip 10312 is arranged in this retention area.

[0066] Through the above settings, the condensable particulate matter condensate entering the colorimetric reaction chip cassette 1031 can accumulate in the retention area, enabling the colorimetric reaction chip 10312 in the retention area to be in full contact with the condensable particulate matter condensate. Taking the colorimetric reaction chip 10312 as a solid-state chip as an example, after the colorimetric reaction is completed, the outlet of the colorimetric reaction chip cassette 1031 can be opened to allow the reacted condensable particulate matter condensate to flow out, and then the probe 1032 is used to collect the spectral data of the colorimetric reaction chip 10312.

[0067] When multiple colorimetric reaction chips 10312 are arranged on the substrate 10311, to avoid the influence between the colorimetric reaction chips 10312, especially when the colorimetric reaction chip 10312 is a liquid chip, as Figure 4A and Figure 4B shown (the hatched filled part can be regarded as the groove wall), multiple grooves can be opened on the substrate 10311, and one colorimetric reaction chip 10312 is correspondingly arranged in one groove.

[0068] Through the above design of further opening grooves, after the condensable particulate matter condensate enters the colorimetric reaction chip cassette 1031, it can be shunted into each groove and flow to the colorimetric reaction chip 10312 arranged in each groove, and the colorimetric reactions in each groove are not affected by each other. After the colorimetric reaction is completed, the probe 1032 is used to collect the spectral data of the colorimetric reaction chip 10312.

[0069] For various CPMs in industrial flue gas, in order to enable each colorimetric reaction chip 10312 to respond quickly and differentially, in the embodiment of the present application, five colorimetric reaction chips 10312 can be arranged on the substrate 10311, 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 in the condensable particulate matter 4 2- ; the third colorimetric reaction chip is used for colorimetric reaction with NH in the condensable particulate matter 4 + ; the fourth colorimetric reaction chip is used for colorimetric reaction with NO in the condensable particulate matter 3 -A colorimetric reaction is carried out; the fifth colorimetric reaction chip is used to carry out a colorimetric reaction with volatile organic compounds in condensable particulate matter.

[0070] Then it can be understood that the colorimetric reaction reagent in the first colorimetric reaction chip is specifically a reagent that can carry out a colorimetric reaction with Cl-. The colorimetric reaction reagent in the first colorimetric reaction chip is preferably ammonium ferric sulfate and mercury thiocyanate. Cl - Reacts with mercury thiocyanate to form hardly ionizable mercuric chloride molecules, and the displaced thiocyanate reacts with ferric ions to form orange-red ferric thiocyanate complex ions. As the concentration of Cl - is higher, the orange-red color is deeper.

[0071] Taking the first colorimetric reaction chip as a liquid chip as an example, in specific implementation, the color developer ammonium ferric sulfate solution and the precipitant mercury thiocyanate solution can be mixed, and the mixed solution is added to the groove on the substrate 10311, and the first colorimetric reaction chip is obtained. Taking the first colorimetric reaction chip as a solid chip as an example, in specific implementation, the color developer ammonium ferric sulfate solution and the precipitant mercury thiocyanate solution can be mixed, and then the carrier sheet is immersed in the mixed solution, and ammonium ferric sulfate and mercury thiocyanate are loaded on the carrier sheet, and the first colorimetric reaction chip is obtained.

[0072] In the above embodiments of 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 mercury thiocyanate solution is absolute ethanol, and the concentration of the mercury 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 mercury 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.

[0073] The colorimetric reaction reagent in the second colorimetric reaction chip is specifically a reagent that can carry out a colorimetric reaction with SO 4 2- A colorimetric reaction is carried out. The colorimetric reaction reagent in the second colorimetric reaction chip is preferably the color developer arsenazo-2-naphthol-3,6-disulfonic acid sodium salt, also known as toluidine dye. SO 4 2- Reacts with toluidine dye to form a red complex. As the concentration of SO 4 2- is higher, the red color is deeper.

[0074] Taking the second colorimetric reaction chip as a liquid chip as an example, in specific implementation, a porphyrin dye solution (pH 3.5 - 4) can be added to the groove on the substrate 10311, and thus the second colorimetric reaction chip is obtained. Taking the second colorimetric reaction chip as a solid chip as an example, in specific implementation, a carrier sheet can be immersed in the porphyrin dye solution (pH 3.5 - 4), and the carrier sheet is loaded with the porphyrin dye, and thus the second colorimetric reaction chip is obtained.

[0075] In the above embodiments for 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 - 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. And, the pH of the porphyrin dye solution is adjusted to 3.5 - 4.

[0076] The colorimetric reaction reagent in the third colorimetric reaction chip is specifically a reagent that can perform 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.

[0077] Taking the third colorimetric reaction chip as a liquid chip as an example, in specific implementation, a Nessler's reagent solution can be added to the groove on the substrate 10311, 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, a carrier sheet can be immersed in the Nessler's reagent solution, and the carrier sheet is loaded with the Nessler's reagent, and thus the third colorimetric reaction chip is obtained.

[0078] In the above embodiments for preparing the third colorimetric reaction chip (including liquid chip and solid chip), the Nessler's reagent solution is selected as mercuric chloride - potassium iodide - potassium hydroxide (HgCl 2-KI-KOH) solution. 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 0.2 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.

[0079] The colorimetric reaction reagent in the fourth colorimetric reaction chip is specifically a reagent that can perform 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 - 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 purple-red azo dye. As the concentration of NO 3 - is higher, the purple-red color is deeper.

[0080] Taking the fourth colorimetric reaction chip as a liquid chip as an example, in specific implementation, the color developer N-(1-naphthyl)ethylenediamine solution and the reaction reagent sulfanilamide solution can be mixed, and the mixed solution (pH is 9 to 12) is added to the groove on the substrate 10311, and the fourth colorimetric reaction chip is obtained. 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 is 9 to 12), and N-(1-naphthyl)ethylenediamine and sulfanilamide are loaded on the carrier sheet, and the fourth colorimetric reaction chip is obtained.

[0081] In the above embodiments of preparing the fourth colorimetric reaction chip (including liquid chip and paper chip), 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 to 12.

[0082] 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. The higher the concentration of n-octadecane, the lighter the blue color.

[0083] 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 10311, and thus the fifth colorimetric reaction chip is obtained. 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, and thus the fifth colorimetric reaction chip is obtained.

[0084] In the above embodiments 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.

[0085] To make the detection range of the spectrometer 10341 and the spectral output range of the light-emitting device 1033 match the spectral range of each colorimetric reaction chip 10312, the spectrometer 10341 can specifically be a NIR Quest512 type spectrometer, with a detection range of 899.20 nm - 1724.71 nm, and the light-emitting device 1033 can specifically be a tungsten halogen light source, with a spectral output of 360 nm - 2400 nm. The light-emitting device 1033 being a tungsten halogen light source can also ensure the stable output of the light source.

[0086] To further improve the accuracy of the detection results, in one embodiment, the condensable particulate matter detection system provided in the above embodiments 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 filter 109, and the outlet of the first filter 109 is communicated with the inlet of the intake pipe 104. Among them, the first filter 109 can be used to filter filterable particulate matter (FPM) in the flue gas.

[0087] It can be understood that by adopting the above solution, by setting the first filter 109 to filter the FPM in the flue gas before the flue gas enters the condenser 102, the influence of FPM on the detection result of CPM can be avoided, thereby further improving the accuracy of the detection result. 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*70mm. When the first air pump 106 is not working, the filter cartridge can replace and clean the filter membrane by itself.

[0088] In practical applications, to enable the gaseous precursors of CPM in the flue gas to be fully condensed, the condensable particulate matter detection system provided in the above embodiments of the present application may further include a cooling water tank 110, and the liquid collection tank 105 is arranged in the cooling water tank 110.

[0089] By arranging the liquid collection tank 105 in the cooling water tank 110, the uncondensed gaseous precursors of CPM in the condenser 102 can be condensed to form CPM in the liquid collection tank 105. To improve the condensation effect, the temperature of the cooling water in the cooling water tank 110 can be 0°C to 5°C.

[0090] To further simplify the system and reduce the equipment investment cost, the condensable particulate matter detection system may further include a cooling water pump 111, which is used to pump the cooling water in the cooling water tank 110 into the cooling water inlet of the condenser 102. At the same time, the cooling water outlet of the condenser 102 is communicated with the cooling water tank 110. Furthermore, the cooling water in the cooling water tank 110 is input into the condenser 102, and after the cooling water exchanges heat with the flue gas in the condenser 102 and absorbs heat, it circulates back to the cooling water tank 110. Thus, the cooling water tank 110 can provide circulating cooling water for the condenser 102.

[0091] In specific implementation, to improve the heat exchange effect, the circulating cooling water can flow through the shell side of the condenser 102, and the flue gas can flow through the tube side of the condenser 102; and, along the flue gas flow direction in the condenser 102, the cooling water inlet of the condenser 102 is located downstream of the condenser 102, and the cooling water outlet of the condenser 102 is located upstream of the condenser 102.

[0092] In the liquid collection tank 105, in order to enable the condensate droplets of condensable particulate matter in the mixed gas to smoothly gather at the bottom of the liquid collection tank 105, an intake pipe can be provided in the liquid collection tank 105. One end of the intake pipe is located outside the liquid collection tank 105 and is used to introduce the mixed gas from the flue gas outlet of the condenser 102; the other end of the intake pipe extends into the liquid collection tank 105 and reaches the bottom of the liquid collection tank 105. Thus, after the mixed gas enters the liquid collection tank 105, the condensate droplets of condensable particulate matter can flow along the intake pipe to the bottom of the liquid collection tank 105, preventing the condensate droplets of condensable particulate matter from being pumped out of the liquid collection tank 105 by the first air pump 106 along with the gas before they have aggregated into larger droplets.

[0093] To avoid affecting the measurement of SO dissolved in the condensate of condensable particulate matter at the bottom of the liquid collection tank 105 2 in the CPM for SO 4 2- the condensable particulate matter detection system can also include a gas storage tank 112, and the outlet of the gas storage tank 112 is communicated with the second inlet of the liquid collection tank 105.

[0094] Among them, the gas stored in the gas storage tank 112 can be nitrogen or inert gas. By setting the outlet of the gas storage tank 112 to be communicated with the second inlet of the liquid collection tank 105, it can be used to introduce nitrogen or inert gas into the condensate of condensable particulate matter at the bottom of the liquid collection tank 105. Correspondingly, the inlet of the second inlet of the liquid collection tank 105 can be located at the bottom of the liquid collection tank 105.

[0095] It can be understood that before introducing the condensate of condensable particulate matter into the colorimetric reaction chip cassette 1031 for detection, nitrogen or inert gas can be first introduced into the condensate of condensable particulate matter in the liquid collection tank 105 through the gas storage tank 112 to make the SO 2 dissolved in the condensate of condensable particulate matter escape, and then the condensate of condensable particulate matter is input into the colorimetric reaction chip cassette 1031 for detection.

[0096] After a detection is completed, to avoid the residual substances in the pipeline affecting the next detection, the condensable particulate matter detection system can also include an acetone storage tank 113, a hexane storage tank 114, a deionized water storage tank 115, an air input pipeline 116, a second filter 117, and an air compressor 118; the outlets of the acetone storage tank 113, the hexane storage tank 114, and the deionized water storage tank 115 are all communicated with the second position B of the intake pipeline 104, the inlet of the air compressor 118 is used to introduce air, the outlet of the air compressor 118 is communicated with the inlet of the second filter 117, the outlet of the second filter 117 is communicated with the inlet of the air input pipeline 116, and the outlet of the air input pipeline 116 is communicated with the third position C of the intake pipeline 104.

[0097] Among them, the acetone storage tank 113 is used to store acetone. The outlet of the acetone storage tank 113 is connected to the second position B of the intake pipeline 104, and can be used to input acetone into the pipeline (including the intake pipeline 104, the tube side of the condenser 102, and the liquid collection tank 105) after a primary detection is completed, so as to remove the organic salts remaining on the pipe wall. Specifically, acetone can remove the polar organic salts remaining on the pipe wall. To enable the acetone in the acetone storage tank 113 to be smoothly input into the pipeline, the condensable particulate matter detection system may further include an acetone liquid pump 119. The outlet of the acetone storage tank 113 is connected to the inlet of the acetone liquid pump 119, and the outlet of the acetone liquid pump 119 is connected to the second position B of the intake pipeline 104.

[0098] The hexane storage tank 114 is used to store hexane. The outlet of the hexane storage tank 114 is connected to the second position B of the intake pipeline 104, and can be used to input hexane into the pipeline (including the intake pipeline 104, the tube side of the condenser 102, and the liquid collection tank 105) after the acetone flushing is completed, so as to further remove the organic salts remaining on the pipe wall. Specifically, hexane can remove the non-polar organic salts remaining on the pipe wall. To enable the hexane in the hexane storage tank 114 to be smoothly input into the pipeline, the condensable particulate matter detection system may further include a hexane liquid pump 120. The outlet of the hexane storage tank 114 is connected to the inlet of the hexane liquid pump 120, and the outlet of the hexane liquid pump 120 is connected to the second position B of the intake pipeline 104.

[0099] The deionized water storage tank 115 is used to store deionized water. The outlet of the deionized water storage tank 115 is connected to the second position B of the intake pipeline 104, and can be used to input deionized water into the pipeline (including the intake pipeline 104, the tube side of the condenser 102, and the liquid collection tank 105) after the hexane flushing is completed, so as to further remove the inorganic salts remaining on the pipe wall. To enable the deionized water in the deionized water storage tank 115 to be smoothly input into the pipeline, the condensable particulate matter detection system may further include a deionized water liquid pump 121. The outlet of the deionized water storage tank 115 is connected to the inlet of the deionized water liquid pump 121, and the outlet of the deionized water liquid pump 121 is connected to the second position B of the intake pipeline 104.

[0100] The air compressor 118 is used to compress air, and the second filter 117 is used to filter the particulate matter in the air. After the deionized water flushing is completed, the purified air can be transported to the pipeline (including the intake pipeline 104, the tube side of the condenser 102, and the liquid collection tank 105) via the air input pipeline 116, for purging and drying the wet pipeline after flushing.

[0101] It can be understood that the flushing liquid after flushing and the purging air can both be discharged from the system through the condensate output main pipeline 107.

[0102] In practical applications, for the convenience of controlling the processes of extracting flue gas, detecting, and flushing, the condensable particulate matter detection system may include multiple valves M, and each valve M can be arranged on the corresponding pipeline according to actual control requirements.

[0103] For example, valves M can be respectively arranged on the intake pipeline 104, the air input pipeline 116, the flushing liquid delivery pipeline, the gas transmission pipeline of the gas storage tank 112, the total condensate output pipeline 107, and the branch condensate output pipeline 108.

[0104] Based on the condensable particulate matter detection system provided in the above embodiments of the present application, the embodiments of the present application also provide a control method for the condensable particulate matter detection system. As Figure 5 shown, the control method may include the following steps:

[0105] Step 201, control the sampling gun to extract flue gas and introduce the flue gas into the condenser.

[0106] Specifically, the first air extraction pump can be turned on to control the sampling gun to extract high-temperature flue gas from the chimney. Under the action of the first air extraction pump, the flue gas extracted by the sampling gun is filtered by the first filter to remove solid particulate matter, and then further transported to the condenser via the intake pipeline.

[0107] Step 202, after condensing to obtain the condensable particulate matter condensate, control to input a preset volume of the condensable particulate matter condensate into the colorimetric reaction chip box for detection.

[0108] Among them, waiting to condense to obtain the condensable particulate matter condensate may mean that the condensable particulate matter condensate is obtained in the liquid collection tank after the flue gas is condensed. The specific process of obtaining the condensable particulate matter condensate in the liquid collection tank includes: in the condenser, the temperature of the flue gas drops rapidly, the CPM gaseous precursors in the flue gas condense to form CPM, and at the same time, the water vapor in the flue gas condenses to form liquid water droplets. The CPM and the liquid water droplets form condensable particulate matter condensate droplets, and the condensable particulate matter condensate droplets are discharged from the flue gas outlet of the condenser into the liquid collection tank. In the liquid collection tank, the temperature further decreases, the particle size of the condensable particulate matter condensate droplets further increases, and under the action of inertia, they are enriched at the bottom of the liquid collection tank, thus forming the condensable particulate matter condensate.

[0109] In practical applications, to avoid the SO 2 dissolved in the condensable particulate matter condensate from affecting the SO 4 2-Before the measurement is affected and before controlling the input of a preset volume of condensable particulate condensate into the colorimetric reaction chip cassette for detection, the control method provided in the embodiments of the present application may further include: introducing nitrogen or inert gas into the condensable particulate condensate in the liquid collection tank for a preset duration. Specifically, the gas storage tank and the corresponding gas pipeline can be opened to introduce gas into the condensable particulate condensate in the liquid collection tank. Among them, the preset duration can be 10 min to 15 min, and the gas flow rate for introducing the gas can be 8 L / min - 15 L / min. The specific duration and specific flow rate can be adjusted more precisely according to different flue gas emission sources.

[0110] It can be understood that after the introduction of nitrogen or inert gas into the condensable particulate condensate in the liquid collection tank is completed, then control the input of a preset volume of condensable particulate condensate into the colorimetric reaction chip cassette for detection. Specifically, the pipe segment of the condensate output main pipeline upstream of the first position and the condensate output branch pipeline can be opened to input condensable particulate condensate into the colorimetric reaction chip cassette. Among them, the preset volume can be 2 ml to 5 ml.

[0111] The specific detection process includes: after the colorimetric reaction in the colorimetric reaction chip cassette is completed, control the probe to direct the light emitted by the light-emitting device to the colorimetric reaction chip cassette and irradiate the colorimetric reaction chip, collect the spectral data of the colorimetric reaction chip, and transmit it to the spectrometer. The spectrometer processes the spectral data to obtain wavelength information and transmits the wavelength information to the computer. The computer determines the concentration of CPM in the condensable particulate condensate based on the corresponding relationship between the wavelength information stored in advance and the CPM concentration.

[0112] In practical applications, after inputting a preset volume of condensable particulate condensate into the colorimetric reaction chip cassette, the condensate output branch pipeline can be closed, and the entire pipe segment of the condensate output main pipeline can be opened to discharge the remaining condensable particulate condensate in the liquid collection tank.

[0113] It can be understood that based on the control method provided in the above embodiments of the present application, by introducing condensable particulate condensate into the colorimetric reaction chip cassette, after a specific colorimetric reaction occurs between the colorimetric reaction chip and CPM, the spectral data of the colorimetric reaction chip is collected by the probe, and the analysis device determines the concentration of CPM based on the spectral data, enabling real-time online detection of CPM. Thus, it is possible to avoid the complex laboratory analysis process and the sample storage and transfer process in the prior art, thereby realizing the rapid detection of CPM, improving the timeliness of the CPM detection result, and improving the accuracy of the CPM detection.

[0114] After the detection is completed, to avoid the residual substances in the pipeline affecting the next detection, such as Figure 6As shown, after step 202, the control method provided by the embodiment of the present application may further include step 203 of flushing and drying the pipeline.

[0115] During specific implementation, the acetone liquid pump, hexane liquid pump, and deionized water liquid pump can be sequentially turned on to flush the pipeline (including the intake pipeline, the tube side of the condenser, and the liquid collection tank). Among them, the flushing duration of acetone, hexane, and deionized water can all be 3 min - 8 min, and the flow rates of acetone, hexane, and deionized water can all be 0.2 L / min to 1.0 L / min. The specific duration and specific flow rate can be further finely adjusted according to different flue gas emission sources. The flushing liquid after flushing is discharged through the total condensate output pipeline.

[0116] After the flushing is completed, the air input pipeline is further turned on, and purified compressed air is blown into the pipeline (including the intake pipeline, the tube side of the condenser, and the liquid collection tank) to purge and dry the wet pipeline after washing. Among them, the flow rate of the compressed air can be 100 L / min to 140 L / min, and the purging duration can be 3 min to 10 min.

[0117] The following will elaborate on the solution provided by the above embodiments of the present application in combination with specific embodiments. It should be understood that the following embodiments are only some specific implementation manners and do not represent improper limitation of the solution of the present application.

[0118] Embodiment 1

[0119] Turn on the first air extraction pump to control the sampling gun to extract high-temperature flue gas from the chimney. Under the action of the first air extraction pump, the flue gas extracted by the sampling gun is filtered by the first filter to remove solid particulate matter, and then further transported to the condenser through the intake pipeline. Among them, the intake pipeline uses a fully heated polytetrafluoroethylene tube with a temperature maintained at 120°C. In the condenser, the temperature of the flue gas drops rapidly, and the CPM gaseous precursors in the flue gas condense to form CPM. At the same time, the water vapor in the flue gas condenses to form liquid water droplets. The CPM and the liquid water droplets form condensable particulate condensate droplets, and the condensable particulate condensate droplets are discharged from the flue gas outlet of the condenser into the liquid collection tank. In the liquid collection tank, the temperature further decreases, and the particle size of the condensable particulate condensate droplets further increases. Under the action of inertia, they are enriched at the bottom of the liquid collection tank to form condensable particulate condensate. Then, turn on the gas storage tank and the corresponding gas transmission pipeline of the gas storage tank, and introduce nitrogen into the condensable particulate condensate in the liquid collection tank. The nitrogen flow rate is 14 L / min, and the introduction duration is 14 min. Then, turn on the pipe section of the total condensate output pipeline upstream of the first position and the condensate output branch pipeline, and input 3 ml of condensable particulate condensate into the colorimetric reaction chip box for detection.

[0120] Among them, the colorimetric reaction chip cassette includes a first colorimetric reaction chip, a second colorimetric reaction chip, a third reaction chip, a fourth colorimetric reaction chip, and a fifth colorimetric reaction chip. The preparation process of each reaction chip is as follows:

[0121] 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 at a volume ratio of 5:1. The mixed solution is added to the groove on the substrate to obtain the first colorimetric reaction chip.

[0122] Second colorimetric reaction chip: The solvent of the toluidine dye solution is absolute ethanol, the concentration of the toluidine dye solution is 2 g / L, and the pH of the toluidine dye solution is adjusted to 3.5. The toluidine dye solution is added to the groove on the substrate to obtain the second colorimetric reaction chip.

[0123] 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.

[0124] 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 at a volume ratio of 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.

[0125] 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.

[0126] After inputting 3 ml of condensable particulate condensate into the colorimetric reaction chip cassette, close the condensate output branch pipeline and open the entire pipeline of the condensate output main pipeline to drain the remaining condensable particulate condensate in the liquid collection tank. Then, turn on the acetone liquid pump, hexane liquid pump, and deionized water liquid pump in sequence to flush the pipeline. Among them, the flushing duration of acetone, hexane, and deionized water is 3 min each, the flow rate of acetone is 0.2 L / min, the flow rate of hexane is 0.2 L / min, and the flow rate of deionized water is 0.5 L / min. After flushing, turn on the air input pipeline, blow purified compressed air into the pipeline, and purge and dry the wet pipeline after washing. Among them, the flow rate of compressed air is 120 L / min, and the purging duration is 5 min.

[0127] Example 2

[0128] Turn on the first air extraction pump and control the sampling gun to extract high-temperature flue gas from the chimney. Under the action of the first air extraction pump, the flue gas extracted by the sampling gun is filtered by the first filter to remove solid particulate matter, and then further transported to the condenser through the intake pipeline. Among them, the intake pipeline uses a polytetrafluoroethylene tube with full-process heating, and the temperature is maintained at 120 °C. In the condenser, the temperature of the flue gas drops rapidly, the CPM gaseous precursors in the flue gas condense to form CPM, and at the same time, the water vapor in the flue gas condenses to form liquid water droplets. The CPM and the liquid water droplets form condensable particulate condensate droplets, and the condensable particulate condensate droplets are discharged from the flue gas outlet of the condenser into the liquid collection tank. In the liquid collection tank, the temperature further decreases, the particle size of the condensable particulate condensate droplets further increases, and under the action of inertia, they are enriched at the bottom of the liquid collection tank to form condensable particulate condensate. Then, turn on the gas storage tank and the corresponding gas transmission pipeline, and introduce nitrogen into the condensable particulate condensate in the liquid collection tank. The nitrogen flow rate is 12 L / min, and the introduction duration is 14 min. Then, turn on the pipeline section of the condensate output main pipeline upstream of the first position and the condensate output branch pipeline, and input 3 ml of condensable particulate condensate into the colorimetric reaction chip cassette for detection.

[0129] Among them, the colorimetric reaction chip cassette includes the first colorimetric reaction chip, the second colorimetric reaction chip, the third reaction chip, the fourth colorimetric reaction chip, and the fifth colorimetric reaction chip. The preparation process of each reaction chip is as follows:

[0130] 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 anhydrous ethanol, and the concentration of the mercuric thiocyanate solution is 0.4 g / L; mix the ammonium ferric sulfate solution and the mercuric thiocyanate solution, and the volume ratio is 5:1. Add the mixed solution into the groove on the substrate to obtain the first colorimetric reaction chip.

[0131] 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 into the groove on the substrate, and the second colorimetric reaction chip is obtained.

[0132] Third colorimetric reaction chip: 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 0.3 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. The mercury dichloride - potassium iodide - potassium hydroxide solution is added into the groove on the substrate, and the third colorimetric reaction chip is obtained.

[0133] 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; the N-(1-naphthyl)ethylenediamine solution and the sulfanilamide solution are mixed, and the volume ratio is 1:1.5, and the pH of the mixture is adjusted to 12. The mixture is added into the groove on the substrate, and the fourth colorimetric reaction chip is obtained.

[0134] 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. The methylene blue dye solution is added into the groove on the substrate, and the fifth colorimetric reaction chip is obtained.

[0135] After inputting 3 ml of condensable particulate condensate into the colorimetric reaction chip box, close the condensate output branch pipeline, and open the entire pipe section of the condensate output main pipeline to discharge the remaining condensable particulate condensate in the liquid collection tank. Then, turn on the acetone liquid pump, hexane liquid pump, and deionized water liquid pump in sequence to flush the pipeline. Among them, the flushing duration of acetone, hexane, and deionized water is 5 min each, the flow rate of acetone is 0.3 L / min, the flow rate of hexane is 0.3 L / min, and the flow rate of deionized water is 0.6 L / min. After flushing, open the air input pipeline, and blow the purified compressed air into the pipeline to purge and dry the wet pipeline after washing. Among them, the flow rate of the compressed air is 110 L / min, and the purging duration is 8 min.

[0136] It should also be noted that the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, commodity or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, commodity or device comprising the element.

[0137] The above are only 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 condenser 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; After the flue gas collected by the sampling gun is condensed by the condenser to obtain a condensable particulate matter condensate, the condensable particulate matter condensate is 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 condensable particulate matter condensate; the probe is used to direct 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 the condensable particulate matter in the condensable particulate matter condensate 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 a liquid collecting tank and a gas storage tank; The smoke outlet of the condenser is communicated with the first inlet of the liquid collecting tank, and the first outlet of the liquid collecting tank is communicated with the inlet of the colorimetric reaction chip box; The outlet of the gas storage tank is communicated with the second inlet of the liquid collecting tank.

10. A control method for a condensable particle detection system according to any one of claims 1 to 9, characterized in that: The control method comprises: Control the sampling gun to extract the flue gas and introduce the flue gas into the condenser; After the condensable particulate matter condensate is obtained by condensation, a preset volume of the condensable particulate matter condensate is input into the colorimetric reaction chip box for detection.

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