Carbon monitoring system for organic carbon element and device for automatically dropwise adding standard solution thereof

Abstract

The utility model relates to an organic carbon element carbon monitoring system and an automatic standard solution dropwise adding device thereof, and belongs to the technical field of carbon detection. The organic carbon element carbon monitoring system comprises a heating furnace and a control system, an optical channel is located in the heating furnace, a sampling filter membrane is arranged in the optical channel, and a detector is arranged at an outlet of the optical channel; the device for automatically dropwise adding the standard solution comprises a first branch pipe, a quantitative pipeline and a carrier liquid supply pipeline, wherein the first branch pipe is used for extending into a heating furnace; the quantitative pipeline is used for providing quantitative standard solution; the carrier liquid supply pipeline is used for providing carrier liquid; the input end of the first branch pipe is communicated with the output end of the standard solution quantitative pipeline; the output end of the carrier liquid supply pipeline is communicated with the input end of the standard solution quantification pipeline, and the carrier liquid supply pipeline is used for driving a quantitative standard solution to a reaction area of the organic carbon element carbon monitoring system. According to the device, the measurement of carbonate carbon in the ambient air particulate matters is realized. The automatic titration calibration device avoids the influence of manual operation, has an automatic titration calibration function and is good in repeatability.

Description

Technical Field

[0001] This application belongs to the technical field of carbon detection, and more particularly relates to an organic carbon element carbon monitoring system and a device for automatically adding standard solutions thereto. Background Art

[0002] The carbonaceous components in aerosols, classified by chemical composition, mainly include organic carbon (OC), elemental carbon (EC), and a small amount of carbonate carbon (CC). Among them, OC contains various organic substances, originating from primary emissions and secondary conversions. EC is elemental carbon, mainly from incomplete combustion of fuels, and total carbon (TC) can be approximately considered as the sum of OC and EC. Black carbon (BC) is a substance with strong light absorption characteristics among the carbonaceous components.

[0003] The main analytical methods for carbonaceous aerosols are divided into three categories: thermal methods, optical methods, and thermo-optical correction methods.

[0004] (1) Thermal methods. Their inherent defect is that they cannot solve the problem of partial carbonization of organic carbon (OC) into elemental carbon (EC) during the thermal decomposition process, resulting in the inability to accurately separate OC and EC.

[0005] (2) Optical methods. They roughly assume that the light absorption of other components of the particulate matter is negligible compared to the light absorption of EC, and their measurement is actually the sum of EC and light-absorbing OC.

[0006] (3) Thermo-optical correction methods. Based on the measurement of OC and EC by thermal methods, they introduce optical correction methods and, based on the change in laser intensity on the filter membrane during the thermal decomposition process, accurately determine the separation point of OC and EC. They are the most widely used and generally recognized mature analytical methods for carbonaceous aerosols internationally.

[0007] Current thermo-optical organic carbon and elemental carbon analyzers mostly rely on thermo-optical correction methods and combine non-dispersive infrared (NDIR) measurement technology to achieve on-line measurement of total carbon (TC), organic carbon (OC), and elemental carbon (EC) in particulate matter. The analyzer enriches particulate matter on a high-temperature resistant quartz filter membrane in a heating furnace through automatic sampling, purges the pipeline with pure He gas, and sequentially activates the anaerobic and aerobic thermal desorption processes. The generated gas is converted into CO2 by a high-temperature oxidation furnace (conversion channel) and enters the NDIR analysis module. During the thermal desorption process, the separation point of OC and EC can be determined according to the change in laser light intensity. After the thermal desorption is completed, the He / CH4 internal standard gas enters the pipeline through a quantitative loop, is oxidized to CO2 by the oxidation furnace, enters the NDIR, and the concentrations of OC and EC are calculated based on the ratio relationship between the CO2 peak areas before and after the separation point and the peak area of the internal standard substance.

[0008] At present, for the online monitoring products of organic carbon and elemental carbon by the thermal optical method, the titration calibration of standard solutions mainly relies on manual operation. Usually, a micro syringe with a range of 10 μL is used to manually extract 1 μL, 2 μL, 5 μL or other standard solutions of different volumes or concentrations for titration tests and calibrations. This kind of manual operation is affected by the differences in the operation methods of different people and sometimes introduces unobvious bubbles. These factors will lead to poor measurement repeatability and large errors.

[0009] In addition, each time the standard solution is titrated, the quartz heating furnace needs to be disassembled. If some repeatability tests and linear tests of different concentrations are carried out, the quartz heating furnace needs to be disassembled and assembled repeatedly, which easily increases the risk of air leakage.

[0010] Moreover, each time the quartz heating furnace is disassembled, the filter membrane lying flat at the front end of the liner will contact the air, which will enrich a certain amount of VOCs in the air and also bring errors to the measurement results.

[0011] Furthermore, the proportion of carbonate carbon in the carbon components generally does not exceed 5%, but in severe dust weather, the proportion of carbonate carbon will increase significantly. Most of the current online monitoring products of organic carbon and elemental carbon do not measure carbonate carbon. Summary of the Invention

[0012] To solve the deficiencies in the above-mentioned existing technical solutions, the present application provides an organic carbon and elemental carbon monitoring system and a device for automatically adding standard solutions.

[0013] The purpose of the present application is achieved through the following technical solutions:

[0014] In the first aspect of the present application, a device for automatically adding standard solutions to an organic carbon and elemental carbon monitoring system is provided. The organic carbon and elemental carbon monitoring system includes a heating furnace and a control system. The optical channel is located inside the heating furnace, a sampling filter membrane is arranged inside the optical channel, and a detector is arranged at the outlet of the optical channel; the device for automatically adding standard solutions includes:

[0015] A first branch pipe for extending into the heating furnace, a standard solution metering pipeline for providing a quantitative standard solution, and a carrier liquid supply pipeline for providing a carrier liquid;

[0016] The input end of the first branch pipe is communicated with the output end of the standard solution metering pipeline; the output end of the carrier liquid supply pipeline is communicated with the input end of the standard solution metering pipeline for driving a quantitative standard solution to the reaction area of the organic carbon and elemental carbon monitoring system.

[0017] Optionally, the standard solution metering pipeline includes: a standard solution device for providing a standard solution, a first valve, and a metering device;

[0018] Wherein, the input end of the first valve is selectively communicated with the standard solution device or the carrier liquid supply pipeline, the output end of the first valve is communicated with the input end of the metering device, and the output end of the metering device is the output end of the standard solution metering pipeline.

[0019] Optionally, it further includes: a second valve;

[0020] The input end of the second valve is communicated with the output end of the standard solution metering pipeline;

[0021] The output end of the second valve is selectively communicated with the waste liquid collection device or the input end of the first branch pipe.

[0022] Optionally, it further includes: a third valve;

[0023] The input end of the third valve is selectively communicated with the gas supply device or the output end of the second valve; the output end of the third valve is communicated with the input end of the first branch pipe.

[0024] Optionally, the carrier liquid supply pipeline includes: a carrier liquid device for supplying carrier liquid and a first switch.

[0025] Optionally, the carrier liquid supply pipeline is used to supply ultrapure water, and the gas supply device is used to supply inert gas; the standard solution in the standard solution device is a sucrose solution;

[0026] The detector includes a multi-channel detector, and the multi-channels respectively correspond to the detection of carbon dioxide and water vapor.

[0027] Optionally, it further includes: an acidic solution device and a second branch pipe;

[0028] The output end of the acidic solution device is communicated with the second branch pipe;

[0029] The second branch pipe extends into the optical channel, and the outlet of the second branch pipe faces the sampling filter membrane.

[0030] Optionally, it further includes: a quartz branch pipe, the pipe orifice of the quartz branch pipe is hermetically connected to the optical channel, and the first branch pipe is inserted into the quartz branch pipe for a certain distance.

[0031] Optionally, the first branch pipe is a pipeline made of high-temperature resistant material, and the first branch pipe extends to the bottom of the quartz branch pipe and is communicated with the inside of the heating furnace.

[0032] In the second aspect of the present application, there is provided an organic carbon element carbon monitoring system, including the device for automatically dripping standard solution according to any one of the above and a gas supply device.

[0033] Compared with the prior art, the present application has the following beneficial effects:

[0034] (1) Good calibration repeatability and small error;

[0035] This application can automatically apply standard liquid without opening the heating furnace and without disassembling the quartz furnace, ensuring airtightness. The internal standard liquid receiving area will not contact the ambient air, thus eliminating the influence of VOCs in the air. Externally, the standard liquid is automatically applied into the optical channel through the first branch pipe without manual operation, avoiding the influence of manual operation, having an automatic titration calibration function, and good repeatability;

[0036] (2) The design of using acidic solution to provide the pipeline realizes the measurement of carbonate carbon. Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the embodiments of this specification. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a schematic structural diagram of the device for automatically dripping standard solution in the embodiment of this application;

[0039] Figure 2 It is a schematic diagram of the heating furnace of the organic carbon element carbon monitoring system provided by this application. Detailed Embodiments

[0040] 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 drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. It should be noted that, without conflict, the implementation manners and features in the present disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0041] The terms used herein are for the purpose of describing particular embodiments and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are also intended to include the plural forms. In addition, when the terms "comprise" and / or "include" and their variants are used in this specification, it is stated that there are the stated features, integers, steps, operations, components, assemblies, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, assemblies, and / or groups thereof. It should also be noted that, as used herein, the terms "substantially", "about" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of measured values, calculated values and / or provided values that would be recognized by those of ordinary skill in the art.

[0042] Figure 1 The structural schematic diagram of the device for automatically dripping standard solution in the embodiments of the present application is given, as Figure 1 shown, the device for automatically dripping standard solution is used in an organic carbon element carbon monitoring system. The organic carbon element carbon monitoring system includes a heating furnace (not shown in the figure) and a control system. The optical channel 1 is arranged in the heating furnace, the sampling filter membrane 51 is arranged in the optical channel 1, and a detector (not shown in the figure) is arranged at the outlet of the optical channel 1. It can be understood that the heating furnace is a furnace body made of high-purity quartz. The laser beam emitted by the laser passes through the optical channel and is incident on the sampling filter membrane. After being absorbed and scattered by the filter membrane and the particulate matter thereon, it is received by the detector, and the detector performs subsequent sample analysis work based on the received signal. The control system is used to coordinate the mutual cooperation between various parts of the organic carbon element carbon monitoring system, complete sample analysis, and realize functions such as human-computer interaction and data communication with the upper computer. This part is the content of the prior art and will not be elaborated herein.

[0043] Among them, the device for automatically dripping standard solution includes: a first branch pipe 411 for extending into the heating furnace, a standard solution metering pipeline for providing a quantitative standard solution, and a carrier liquid supply pipeline for providing a carrier liquid. The input end of the first branch pipe 411 is communicated with the output end of the standard solution metering pipeline; the output end of the carrier liquid supply pipeline is communicated with the input end of the standard solution metering pipeline, and is used to drive the quantitative standard solution to the reaction area of the organic carbon element carbon monitoring system.

[0044] Among them, the standard solution metering pipeline includes: a standard solution device 11 for providing a standard solution, a first valve 31, and a metering device 81. The input end of the first valve 31 is selectively connected to the standard solution device 11 or the carrier liquid supply pipeline, the output end of the first valve 31 is connected to the input end of the metering device 81, and the output end of the metering device 81 is the output end of the standard solution metering pipeline. The metering device 81 can specifically be a metering loop. The standard solution metering pipeline 1 is also provided with a first pump 21.

[0045] As a specific embodiment, the device for automatically dropping a standard solution provided by the present application may further include: a second valve 32. The input end of the second valve 32 is connected to the output end of the metering device 81. The output end of the second valve 32 is selectively connected to the waste liquid collection device 14 or the input end of the first branch pipe 411. The waste liquid collection device 14 can specifically be a waste liquid bucket.

[0046] As another specific embodiment, the device for automatically dropping a standard solution provided by the present application may further include: a second valve 32 and a third valve 33. The input end of the second valve 32 is connected to the output end of the metering device 81. The output end of the second valve 32 is selectively connected to the waste liquid collection device 14 or connected to the input end of the third valve. The input end of the third valve 33 is selectively connected to the gas supply device 13 or the output end of the second valve 32; the output end of the third valve 33 is connected to the input end of the first branch pipe 411.

[0047] The carrier liquid supply pipeline includes: a carrier liquid device 12 for providing a carrier liquid and a first switch 34. The carrier liquid supply pipeline is also provided with a second pump 22.

[0048] The outlet of the first branch pipe 411 extends into the quartz branch pipe 41, and the quartz branch pipe 41 is connected to the optical channel 1 through a first opening 100.

[0049] In order to push the standard liquid and discharge the oxygen in the heating furnace, further, the carrier liquid supply pipeline is used to provide ultrapure water, and the gas supply device 13 is used to provide inert gas; the standard solution is a sucrose solution.

[0050] It can be understood that the quartz branch pipe 41 is fixed on the heating furnace, and the first opening 100 connects the quartz branch pipe 41 and the heating furnace.

[0051] To achieve the detection of carbonate carbon, further, the monitoring system further includes: an acidic solution device 15 and a second branch pipe 412. The output end of the acidic solution device 15 is communicated with the second branch pipe 412; the second branch pipe 412 extends into the optical channel 1, and the outlet of the second branch pipe 412 faces the sampling filter membrane 51. A third pump 23 is further provided between the acidic solution device 15 and the second branch pipe 412 for controlling the extraction of the acidic solution.

[0052] As Figure 1 shown, the quartz heating furnace includes a straight cylindrical optical channel 1, and the sampling filter membrane 51 is vertically arranged in the optical channel 1.

[0053] The upper side of the heating furnace has a first opening 100, and the quartz branch pipe 41 is fixed on the vertical upper side of the first opening 100. The first opening 100 communicates the quartz branch pipe 41 and the optical channel 1. The first branch pipe 411 and the second branch pipe 412 are arranged in the branch pipe 41 and pass through the first opening 100, and the opening of the second branch pipe 412 faces the sampling filter membrane 51. In the optical channel 1, a container 101 is arranged near the sampling filter membrane 51 for accommodating the standard solution dropped from the first branch pipe 411.

[0054] The standard solution (sucrose solution) device 11 is sequentially communicated with the first inlet of the first pump 21 and the first valve 31, and the carrier liquid (ultrapure water) device 12 is sequentially communicated with the second pump 22, the first switch 34 and the second inlet of the first valve 31. The outlet of the first valve 31 is sequentially communicated with the metering device 81 (metering loop) and the inlet of the second valve 32. One outlet of the second valve 32 is communicated with the waste liquid collection device 14, and the other outlet is communicated with the third valve 33. Both the first valve 31 and the second valve 32 use electromagnetic three-way valves.

[0055] The third valve 33 includes a first valve 331 and a second valve 332, so that the gas (inert gas) supply device 13 and the other outlet of the second valve 32 (through the three-way joint 71) are selectively communicated with the first branch pipe 411.

[0056] The acidic solution (hydrochloric acid) device 15 is sequentially communicated with the third pump 23, the flow control module 61 and the second branch pipe 412.

[0057] It can be understood that the power of the third pump 23 is large enough to pump a large flow of acidic solution into the pipeline and spray it onto the sampling filter membrane through the thin pipe. After the normal sampling is completed, through this operation, the carbonate in the particulate sample enriched in the sampling filter membrane reacts with the acid to generate CO2, and by measuring the amount of CO2, the measurement of carbonate carbon is achieved.

[0058] On the basis of any of the above embodiments, the present application further provides an organic carbon element carbon monitoring system, including any of the above devices for automatically dropping the standard solution. AsFigure 2 As shown in the schematic diagram of the heating furnace of the organic carbon element carbon monitoring system provided by this application, a container 101 for receiving the solution and a first branch pipe 41 can be set at position 1 or position 2 shown in Figure 2 and the branch pipe can be connected to a device for automatically dropping the standard solution.

[0059] Specifically, a quartz branch pipe 41 can be added at position 1 or position 2. The inner diameter of the quartz branch pipe 41 should be as thin as possible. The thin pipe (the first branch pipe 411) at the lower end of the tee structure can be inserted into the quartz branch pipe 41, and sealed at the orifice of the quartz branch pipe.

[0060] Furthermore, for the thin pipe (the first branch pipe 411) inserted into the quartz branch pipe 41, if it is a pipeline made of high-temperature resistant material, it can be inserted all the way to the bottom of the quartz branch pipe 41 to communicate with the inside of the quartz furnace, but it cannot penetrate deep into the quartz furnace because penetrating deep into the quartz furnace may block the laser light path.

[0061] If the thin pipe (the first branch pipe 411) below the tee is not a pipeline made of high-temperature resistant material, it is sufficient to extend the outlet into the quartz branch pipe 41 for a short distance, because the area near the orifice of the quartz branch pipe belongs to the normal temperature region, and the lower part of the quartz pipe is close to the quartz furnace, and there will be a high-temperature process during the analysis process.

[0062] Based on the above device and system, the implementation process in the calibration stage includes the following steps:

[0063] S1: The first valve selects to connect the standard solution metering pipeline, and the second valve selects to connect the waste liquid collection device; the standard solution enters the metering device through the first valve until the set solution volume is reached, and the excess solution enters the waste liquid collection device.

[0064] S2: The first valve selects to connect the carrier liquid supply pipeline, the second valve selects to connect the inlet of the third valve, and the third valve selects to connect the outlet of the second valve; the carrier liquid passes through the first valve, pushes the standard solution in the metering device to pass through the second valve and the third valve in sequence, and passes through the first opening into the ZSU240426CN

[0065] optical channel.

[0066] S3: After the standard solution in the metering device is emptied, the third valve selects to connect the gas supply device, and the inert gas enters the first branch pipe through the third valve.

[0067] S4: The monitoring system enters the analysis state, the detector outputs the detection result of the standard solution, and completes the calibration according to the theoretical value of the standard solution.

[0068] Further, the detection process further includes: performing step S0 before step S1: The third valve selects to connect to the gas supply device, and the inert gas enters the first branch pipe through the third valve to purge the first branch pipe.

[0069] The working process of the device provided in the present application will be specifically introduced below:

[0070] When the analyzer is working normally and no standard solution titration calibration is carried out, the second valve 332 is opened, and the high-purity inert gas enters the first branch pipe through the second valve 332 to purge the first branch pipe to prevent oxygen from remaining inside the first branch pipe. At this time, the first switch 34 is closed, and the pump 21 in the standard solution (sucrose solution) metering pipeline can stop working. The standard solution in the metering loop 81 can be in an emptied state. If the pump 21 in the standard solution (sucrose solution) metering pipeline works, the metering loop 81 will be filled with the standard solution, and waste liquid will be discharged into the waste liquid bucket 14 in real time. At this time, the ultra-pure water pump in one way does not work.

[0071] When the analyzer stops working and is ready to carry out the standard solution titration calibration, the whole machine will first go through one or more analysis processes to clear the furnace, ensuring that there is no oxygen residue in the pipeline and no pollutant residue on the sampling filter membrane. Then the second valve 332 is closed, and at the same time, the pump 21 in the standard solution (sucrose solution) metering pipeline starts to fill the standard solution into the metering loop 81, and the excess solution is discharged into the waste liquid bucket 14.

[0072] After the metering loop 81 is filled with the standard solution, the pump 22 in the carrier liquid (ultra-pure water) supply pipeline starts to work, and the first switch 34 is opened. At this time, the ultra-pure water serves as the carrier liquid, driving the standard solution in the metering loop 81 to flow into the tee structure, further into the thin tube in the quartz branch pipe 41, and finally dropping onto the quartz filter membrane or into the container at the lower wall of the quartz furnace.

[0073] After all the solution in the metering loop 81 has dropped into the quartz furnace, the pump 22 in the carrier liquid (ultra-pure water) supply pipeline stops working again. This can ensure that all the standard liquid is brought into the quartz furnace. After the pump stops working, there may be some ultra-pure water remaining in the thin tube. At this time, the second valve 332 is opened, and the high-purity inert gas starts to purge, which can continue to drop the liquid remaining in the thin tube into the quartz furnace due to pressure problems.

[0074] Close the first switch 34, keep the second valve 332 open, and start the analysis process of the whole machine. In the analysis process, the carbon components in the standard solution will generate gas with temperature changes, be further oxidized into CO2, and finally be measured by the detector to realize the automatic titration calibration of the standard solution of the whole machine.

[0075] Further, if different carbon amounts need to be measured, the quantitative loop can be filled multiple times and then introduced into the quartz furnace. After reaching a specific number of times, that is, after reaching a specific standard liquid volume, the analysis process can be carried out to achieve the measurement of standard solutions with different carbon amounts. Or different carbon amounts can also be measured by changing the solution concentration in the standard liquid container.

[0076] It can be understood that in this application, a titration branch is provided in the heating area of the quartz furnace, and the branch is externally connected to the standard solution titration flow path. The entire flow path part can be controlled by the control unit of the system to achieve fully automatic titration calibration.

[0077] It can also be understood that a blank filter membrane can be provided in the optical channel 1 so that the standard solution titration is carried out on the blank filter membrane. A multi-way valve can also be used to replace the three switching modules, which does not affect the implementation of this application.

[0078] In this application, a titration branch is provided in the heating area of the quartz furnace, and the branch is externally connected to the standard solution titration flow path. The entire flow path part can be controlled by the system control unit to achieve fully automatic titration calibration. Further, a hydrochloric acid splash flow path can be added to the branch to solve the problem of carbonate carbon measurement.

[0079] The quartz branch provided in this application can also be used to connect the standard gas for standard gas calibration.

[0080] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not used to limit the protection scope of this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims

1. An apparatus for automatically adding a standard solution to an organic carbon element carbon monitoring system. The organic carbon element carbon monitoring system includes a heating furnace and a control system. An optical channel is located inside the heating furnace, a sampling filter membrane is disposed inside the optical channel, and a detector is disposed at the outlet of the optical channel; characterized in that, The device for automatically dripping standard solution includes: a first branch pipe for extending into the heating furnace, a standard solution metering pipeline for providing a quantitative standard solution, and a carrier liquid supply pipeline for providing a carrier liquid; the input end of the first branch pipe is communicated with the output end of the standard solution metering pipeline; the output end of the carrier liquid supply pipeline is communicated with the input end of the standard solution metering pipeline, and is used to drive a quantitative standard solution to the reaction area of the organic carbon element carbon monitoring system.

2. The device for automatically dripping standard solution according to claim 1, wherein, The standard solution metering pipeline includes: a standard solution device for providing a standard solution, a first valve, and a metering device; wherein, the input end of the first valve is selectively communicated with the standard solution device or the carrier liquid supply pipeline, the output end of the first valve is communicated with the input end of the metering device, and the output end of the metering device is the output end of the standard solution metering pipeline.

3. The device for automatically dripping standard solution according to claim 2, characterized in that, It further includes: a second valve; the input end of the second valve is communicated with the output end of the standard solution metering pipeline; the output end of the second valve is selectively communicated with a waste liquid collection device or the input end of the first branch pipe.

4. The device for automatically dripping a standard solution according to claim 3, wherein It further includes: a third valve; the input end of the third valve is selectively communicated with a gas supply device or the output end of the second valve; the output end of the third valve is communicated with the input end of the first branch pipe.

5. The device for automatically dropping a standard solution according to claim 1, characterized in that, The carrier liquid supply pipeline includes: a carrier liquid device for providing a carrier liquid and a first switch.

6. The device for automatically dropping a standard solution according to claim 4, characterized in that, The carrier liquid supply pipeline is used to provide ultrapure water, the gas supply device is used to provide an inert gas; the standard solution is a sucrose solution; The detector includes a multi-channel detector, and the multi-channels respectively correspond to the detection of carbon dioxide and water vapor.

7. The device for automatically dripping standard solution according to claim 6, characterized in that, It further includes: an acidic solution device and a second branch pipe; the output end of the acidic solution device is communicated with the second branch pipe; the second branch pipe extends into the optical channel, and the outlet of the second branch pipe faces the sampling filter membrane.

8. The device for automatically dropping a standard solution according to any one of claims 1 to 7, characterized in that It further includes: a quartz branch pipe, the pipe orifice of the quartz branch pipe is hermetically connected to the optical channel, and the first branch pipe is inserted into the quartz branch pipe for a certain distance.

9. The device for automatically dropping a standard solution according to claim 8, characterized in that, The first branch pipe is a pipeline made of high-temperature resistant material, and the first branch pipe extends to the bottom of the quartz branch pipe and is communicated with the inside of the heating furnace.

10. An organic carbon element carbon monitoring system, characterized in that, It includes the device for automatically dripping standard solution according to any one of claims 1 to 9.

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