CN111239080A - Quality control device and OCEC analytic system - Google Patents
Quality control device and OCEC analytic system Download PDFInfo
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- CN111239080A CN111239080A CN202010068568.2A CN202010068568A CN111239080A CN 111239080 A CN111239080 A CN 111239080A CN 202010068568 A CN202010068568 A CN 202010068568A CN 111239080 A CN111239080 A CN 111239080A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N2021/558—Measuring reflectivity and transmission
Abstract
The invention provides a quality control device and an OCEC analysis system, wherein the quality control device comprises a spray pipe, a standard liquid quantifying device and a carrier gas device, wherein the spray pipe is used for extending into a sample furnace and extending to a filter membrane, the standard liquid quantifying device is communicated with the input end of the spray pipe and is used for providing quantitative standard solution, and the carrier gas device is communicated with the input end of the standard liquid quantifying device and is used for providing carrier gas to spray the quantitative standard solution in the standard liquid quantifying device onto the filter membrane. When the external standard is carried out, a carrier gas output by the carrier gas device is used for manufacturing a positive pressure to spray quantitative standard solution in the standard solution quantifying device onto the filter membrane through the spray pipe for analysis, the positive pressure is used for forming an impact effect, the quantitative standard solution is favorably sprayed onto the filter membrane, and meanwhile, the pipeline residue is avoided. The quality control device is simple to operate, can reduce human interference factors brought by manual operation, can reduce maintenance amount, and realizes automatic operation of instruments.
Description
Technical Field
The invention relates to the technical field of analysis of carbon components in air particles, in particular to a quality control device. In addition, the invention also relates to an OCEC analysis system comprising the quality control device.
Background
The carbonaceous component in the air particulate is generally 10% to 70% of the mass concentration of the air particulate, and is an important constituent of the air particulate. The carbonaceous components can be divided into three main groups: organic Carbon (OC), Elemental Carbon (EC), and Carbon Carbonate (CC). OC is mainly generated from emission and biological emission in the primary combustion process and the generation of products in a particle state after the chemical reaction of volatile organic compounds in air and oxidizing substances in air. EC, also known as carbon Black (BC), is derived primarily from incomplete combustion of carbonaceous fuels. CC is mainly present in soil and coal mine fly ash and has mass concentration far less than EC and OC, so the CC component in the air particles can be generally ignored.
The carbonaceous component of the air particulate can have an impact on global climate, air visibility, and human health. The effect of particulate matter on global climate change has long been considered a cooling effect, but more and more reports now suggest that the effect of EC on global warming is very significant. The EC can absorb light in the full range from infrared to ultraviolet, thereby "heating" the earth. In addition, EC can deepen the color of the particles, so that substances which do not absorb radiation or absorb less radiation originally can also absorb light, the radiation compelling of the particles is increased, and the visibility of air is reduced. The OC plays a role in scattering light, greatly influences the visibility of regional air, and is rich in carcinogens and genotoxic mutagens. As most of the carbon components of the air particles exist in the particles (0.1-2.5 microns), the carbon components can easily enter the lung of a human body through the respiration of the human body, destroy and change the structure and function of the lung, cause chronic respiratory diseases, and even change the structure of DNA. Therefore, the research on the carbonaceous components of air particles is a hot spot in the field of environmental monitoring today.
Currently, for the study of the carbonaceous component (OC/EC) of air particles, two methods are mainly adopted: membrane sampling + off-line analysis and on-line OC/EC monitoring. However, the time resolution of data obtained by the conventional membrane sampling and offline analysis method is low, information of air particulate matter characteristic change in a short time is difficult to reflect, and artificial interference is easily introduced, so that the online OC/EC analyzer is a research trend.
Aiming at continuously and online collected air samples in the prior art, an online analyzer for analyzing the carbon components in the air particles is provided, but the problems of inaccurate sample collection and incapability of automatic full-flow blank test exist. The patent No. 201010249182.8, entitled on-line particulate carbonaceous component collecting analyzer, provides an on-line aerosol carbonaceous component collecting analyzer, which comprises a carrier gas path system and a sampling-analyzing gas path system; the carrier gas path system comprises a He gas path, a He-purge gas path, a He/Ox gas path and a He/CH4 gas path: the sampling-analyzing gas path system comprises a sampling gas path, an analyzing-oxidizing furnace and an analyzing gas path, and the following problems are still existed although the on-line analysis of the air particulate matter components is realized to a certain extent.
The use and maintenance of an organic carbon element carbon on-line analyzer (Hu gang, Chu nationality) records that a quartz film is required to be horizontally placed at the front section of a quartz liner tube of the analyzer for calibrating the analyzer, the quartz liner tube is connected, then impurities in the quartz film are removed completely, a sucrose solution with standard concentration is absorbed by a precise sample injection needle, the solution is carefully dropped near the center of the horizontally placed quartz film, and the quartz liner tube is connected. Therefore, the existing organic carbon element carbon online analyzer needs to manually calibrate the instrument and calibrate a standard curve, and during the calibration or calibration process, instrument parts need to be repeatedly disassembled and assembled, so that the steps are very complicated, and the automation degree is low.
The curve calibration and quality control processes of the on-line analyzer are manual operations, and when the standard solution is adopted for external calibration, the basic steps are approximately as follows: taking a clean filter membrane, burning the filter membrane completely, extracting a certain volume of standard solution with a certain concentration by using a sample injection needle, dripping the standard solution on the filter membrane, and putting the filter membrane into a glass tube. The whole operation process is complex and tedious, the glass tube needs to be frequently disassembled and assembled, external interference is easily brought in the operation process, each step is completed manually by a person, the requirement on operators is high, and the artificial interference factor is large.
Therefore, in order to obtain monitoring data more accurately and quickly and reduce human interference factors brought by manual operation, a quality control device capable of realizing automation and an OCEC analysis system comprising the quality control device are needed.
Disclosure of Invention
The invention provides a quality control device and an OCEC (optical particle analysis) system, which are used for solving the problems of complex operation and large human interference factor when the existing air particulate carbon component analysis system is subjected to external standard.
The technical scheme adopted by the invention is as follows:
the invention provides a quality control device, which comprises a spray pipe, a standard liquid quantifying device and a carrier gas device, wherein the spray pipe is used for extending into a sample furnace and extending to a filter membrane, the standard liquid quantifying device is communicated with the input end of the spray pipe and is used for providing quantitative standard solution, and the carrier gas device is communicated with the input end of the standard liquid quantifying device and is used for providing carrier gas to spray the quantitative standard solution in the standard liquid quantifying device onto the filter membrane.
Furthermore, the standard liquid quantifying device comprises a standard liquid device for providing standard solution, a first control valve respectively communicated with the output end of the carrier gas device and the output end of the standard liquid device, a quantifying device communicated with the output end of the first control valve, a second control valve respectively communicated with the output end of the quantifying device and the input end of the spray pipe, and an emptying pipeline communicated with the output end of the second control valve.
Furthermore, the liquid marking device comprises a liquid marking bottle, a third control valve, an ultra-pure water bottle and a fourth control valve, wherein the third control valve is respectively communicated with the output end of the liquid marking bottle and the input end of the first control valve; or the standard solution device comprises a plurality of standard solution bottles which are respectively communicated with the input end of the first control valve and used for storing standard solutions with different concentrations.
The invention also provides an OCEC analysis system which comprises a sampling pipeline, a sample furnace arranged on the sampling pipeline, and a filter membrane arranged in the sample furnace and used for collecting particulate matters in sample gas, wherein the input end of the sample furnace is respectively communicated with a gas-carrying pipeline and a helium-oxygen pipeline, a laser and a detection device are arranged outside the sample furnace, the output end of the sample furnace is communicated with an oxidation furnace, the output end of the oxidation furnace is communicated with a carbon dioxide sensor, and the OCEC analysis system also comprises the quality control device.
Furthermore, a particulate cutter used for cutting and classifying the particulate matters in the sample gas, an erosion device communicated with the output end of the particulate cutter and used for adsorbing gaseous organic matters in the sample gas, and a fifth control valve respectively communicated with the output end of the erosion device and the input end of the sample furnace are arranged on the sampling pipeline.
Further, a sixth control valve is arranged between the output end of the particulate cutter and the input end of the erosion device, and the input end of the sixth control valve is communicated with a particulate filter used for filtering particulate matters in the air to obtain blank sample gas.
Furthermore, the output end of the carrier gas pipeline is communicated with the input end of the fifth control valve, and a first heating device for heating the corrosion device so as to release the gaseous organic matters adsorbed by the corrosion device when the carrier gas in the carrier gas pipeline flows into the corrosion device through the fifth control valve is arranged outside the corrosion device.
Further, the sample furnace includes an outer tube, an inner tube disposed in the outer tube for fixing the filter membrane in the outer tube, and a second heating device disposed outside the outer tube for heating the filter membrane.
Furthermore, the output end of the carrier gas pipeline is communicated with a purging pipeline which is communicated with the gap between the outer pipe and the inner pipe and used for purging air in the gap by using helium gas output by the carrier gas pipeline, and a seventh control valve is arranged on the purging pipeline.
Furthermore, the input end of the carrier gas pipeline is communicated with a carrier gas bottle for providing carrier gas, the input end of the helium-oxygen pipeline is communicated with a helium-oxygen bottle for providing mixed gas of helium and oxygen, a valve bank is arranged on the carrier gas pipeline, and the output end of the helium-oxygen pipeline is communicated with the input end of the valve bank; the output end of the valve group is communicated with a flow controller used for measuring the flow of the carrier gas or the mixed gas.
Furthermore, a light splitting sheet is arranged on an output light path of the laser, and the detection device comprises a first detector and a second detector, wherein the first detector is used for receiving the laser penetrating through the filter membrane and detecting the light intensity of the laser, and the second detector is used for receiving the laser reflected by the filter membrane and the light splitting sheet and detecting the light intensity of the laser.
Further, a tenth control valve is provided between the output end of the oxidation furnace and the input end of the carbon dioxide sensor, so that the airtightness of the OCEC analysis system is checked by closing the tenth control valve and other valves.
The invention has the following beneficial effects:
according to the quality control device, when external calibration is carried out, the carrier gas output by the carrier gas device is used for producing positive pressure, the quantitative standard solution in the standard solution quantifying device is sprayed onto the filter membrane through the spray pipe for analysis, the impact effect is formed by using the positive pressure, the quantitative standard solution is favorably sprayed onto the filter membrane, and meanwhile, pipeline residue is avoided. The quality control device is simple to operate, can reduce human interference factors brought by manual operation, can reduce maintenance amount, and realizes automatic operation of instruments.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a control device according to a preferred embodiment of the present invention;
FIG. 2 is a second schematic view of a control apparatus according to a preferred embodiment of the present invention;
FIG. 3 is a schematic view of a marking device according to a first preferred embodiment of the present invention;
FIG. 4 is a schematic view of a marking device according to a second preferred embodiment of the present invention;
fig. 5 is a schematic diagram of an OCEC analysis system in accordance with a preferred embodiment of the present invention.
Description of reference numerals:
1. filtering the membrane; 2. a nozzle; 3. a standard solution quantifying device; 4. a carrier gas device; 5. a marking liquid device; 6. a first control valve; 7. a dosing device; 8. a second control valve; 9. evacuating the line; 10. a liquid label bottle; 11. a third control valve; 12. an ultra-pure water bottle; 13. a fourth control valve; 14. a sampling pipeline; 15. a carrier gas line; 16. a helium-oxygen line; 17. a laser; 18. an oxidation furnace; 19. a carbon dioxide sensor; 20. a particulate cutter; 21. an erosion device; 22. a fifth control valve; 23. a sixth control valve; 24. a particulate filter; 25. a first heating device; 26. an outer tube; 27. an inner tube; 28. a second heating device; 29. purging the pipeline; 30. a seventh control valve; 31. a gas-carrying cylinder; 32. a helium-oxygen bottle; 33. a valve block; 34. a flow controller; 35. a light splitting sheet; 36. a first detector; 37. a second detector; 38. an eighth control valve.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
FIG. 1 is a schematic view of a control device according to a preferred embodiment of the present invention; FIG. 2 is a second schematic view of a control apparatus according to a preferred embodiment of the present invention; FIG. 3 is a schematic view of a marking device according to a first preferred embodiment of the present invention; FIG. 4 is a schematic view of a marking device according to a second preferred embodiment of the present invention; fig. 5 is a schematic diagram of an OCEC analysis system in accordance with a preferred embodiment of the present invention.
As shown in fig. 1 and 2, the quality control device of the present invention includes a nozzle 2 extending into the sample furnace and extending to the filter membrane 1, a standard solution quantifying device 3 communicating with an input end of the nozzle 2 and for providing a quantitative standard solution, and a carrier gas device 4 communicating with an input end of the standard solution quantifying device 3 and for providing a carrier gas to eject the quantitative standard solution in the standard solution quantifying device 3 onto the filter membrane 1.
According to the quality control device, when external calibration is carried out, the carrier gas output by the carrier gas device 4 is used for producing positive pressure, the quantitative standard solution in the standard solution quantifying device 3 is sprayed onto the filter membrane 1 through the spray pipe 2 for analysis, the positive pressure is used for forming an impact effect, the quantitative standard solution is favorably sprayed onto the filter membrane 1, and meanwhile, pipeline residue is avoided. The quality control device is simple to operate, can reduce human interference factors brought by manual operation, can reduce maintenance amount, and realizes automatic operation of instruments. Alternatively, the nozzle 2 is a quartz capillary tube. Alternatively, the standard solution is a sucrose solution. Alternatively, the carrier gas device 4 may output a carrier gas such as helium, nitrogen, or argon as needed.
As shown in fig. 2, in the present embodiment, the target liquid metering device 3 includes a target liquid device 5 for supplying a standard solution, a first control valve 6 communicated with an output end of the carrier gas device 4 and an output end of the target liquid device 5, respectively, a metering device 7 communicated with an output end of the first control valve 6, a second control valve 8 communicated with an output end of the metering device 7 and an input end of the spray pipe 2, respectively, and an evacuation line 9 communicated with an output end of the second control valve 8. The first control valve 6 and the second control valve 8 are controlled to communicate the standard solution device 5, the quantitative device 7 and the emptying pipeline 9, so that the standard solution output by the standard solution device 5 flows into the quantitative device 7, and the quantitative device 7 collects a quantitative amount of the standard solution. Then the carrier gas device 4, the quantitative device 7 and the spray pipe 2 are communicated by controlling the first control valve 6 and the second control valve 8, and the standard solution quantitatively determined in the quantitative device 7 is sprayed onto the filter membrane 1 through the spray pipe 2 by using the carrier gas output by the carrier gas device 4 to produce a positive pressure. Alternatively, the dosing means 7 employs a dosing ring.
As shown in fig. 3 and 4, in the present embodiment, the liquid marking device 5 includes a liquid marking bottle 10, a third control valve 11 communicated with an output end of the liquid marking bottle 10 and an input end of the first control valve 6, respectively, an ultra-pure water bottle 12, and a fourth control valve 13 communicated with an output end of the ultra-pure water bottle 12 and an input end of the first control valve 6, respectively. The flow ratio of the standard solution to the ultrapure water is controlled by the third control valve 11 and the fourth control valve 13, so that the purpose of configuring standard solutions with different concentrations for quantification is achieved. Optionally, the standard solution device 5 comprises a plurality of standard solution bottles 10 respectively communicated with the input ends of the first control valves 6 and used for storing standard solutions with different concentrations. The flow path is switched to a standard solution bottle 10 storing standard solutions of different concentrations by a first control valve 6, and the standard solution of a specific concentration is quantified. When carrying out the external standard, switch over the standard solution of different concentrations through mark liquid device 5, through selecting the standard solution of a certain concentration and carrying out the ration back, through carrying out the peak area that the normal testing process obtained the standard solution of corresponding concentration to the standard solution, obtain the standard curve through carrying out the normal testing process to the standard solution of quantitative different concentrations, can guarantee the accuracy of the detection of organic carbon and elemental carbon.
As shown in fig. 5, a preferred embodiment of the present invention further provides an OCEC analysis system, which includes a sampling pipeline 14, a sample furnace disposed on the sampling pipeline 14, and a filter membrane 1 disposed in the sample furnace and used for collecting particulate matters in a sample gas, wherein an input end of the sample furnace is respectively communicated with a gas-carrying pipeline 15 and a helium-oxygen pipeline 16, a laser 17 and a detection device are disposed outside the sample furnace, an output end of the sample furnace is communicated with an oxidation furnace 18, an output end of the oxidation furnace 18 is communicated with a carbon dioxide sensor 19, and the OCEC analysis system further includes the above-mentioned quality control device.
According to the OCEC analysis system, after sample gas in the air flows into the sample furnace through the sampling pipeline 14, particulate matters in the sample gas are collected through the filter membrane 1. Then, helium is input into the sample furnace through the carrier gas pipeline 15 to sweep the sample furnace, so that an oxygen-free environment is formed in the sample furnace, and the filter membrane 1 is heated through the sample furnace, so that organic carbon in particles on the filter membrane 1 is converted into gas. The elemental carbon in the particles on the filter membrane 1 is not converted into gas due to the oxygen-free environment in the sample furnace. Then, the mixed gas of helium and oxygen is input into the sample furnace through a helium-oxygen pipeline 16, so that an aerobic environment is formed in the sample furnace, and the filter membrane 1 is heated through the sample furnace, so that the element carbon in the particles on the filter membrane 1 is converted into gas. In the process of converting organic carbon and element carbon into gas, laser 17 continuously emits laser and irradiates the filter membrane 1 with the laser, and a detection device receives the laser and detects the light intensity of the laser. In the process of converting organic carbon into gas, a part of the organic carbon can be carbonized into element carbon, and the light intensity of the laser received by the detection device is gradually weakened. In the process of converting the element carbon into gas, the light intensity of the laser received by the detection device is gradually enhanced. When the light intensity of the laser received by the detection device is restored to the initial light intensity, the light intensity is regarded as a distinguishing point between the organic carbon and the elemental carbon, that is, the organic carbon is considered to be converted into the gas before the distinguishing point, and the elemental carbon is considered to be converted into the gas after the distinguishing point. Finally, the gas is oxidized into carbon dioxide through an oxidation furnace 18, the amount of the carbon dioxide is detected through a carbon dioxide sensor 19, the amount of the organic carbon and the element carbon in the particles on the filter membrane 1 is converted according to the amount of the carbon dioxide, and the concentration of the organic carbon and the element carbon in the air particles is calculated according to the amount of the organic carbon and the element carbon in the particles on the filter membrane 1 and the sampling volume. Alternatively, the carrier gas line 15 may output a carrier gas such as helium, nitrogen, or argon as needed.
As shown in fig. 5, in the present embodiment, the sampling pipeline 14 is provided with a particulate cutter 20 for cutting and classifying the particulate matters in the sample gas, an erosion device 21 communicated with an output end of the particulate cutter 20 and used for adsorbing gaseous organic matters in the sample gas, and a fifth control valve 22 respectively communicated with an output end of the erosion device 21 and an input end of the sample furnace. The sample gas enters the sampling pipeline 14 through the particulate cutter 20, and the particulate cutter 20 can cut and classify the particulate in the sample gas to obtain the particulate with the required particle size range. Gaseous state organic matter in the sample gas can be got rid of through the gaseous state organic matter of erosion ware 21 in to the sample gas absorption, avoids gaseous state organic matter to cause the interference to the detection of organic carbon in the particulate matter. After sampling is completed, the fifth control valve 22 is closed, so that air can be prevented from entering the sample furnace, and interference on detection of organic carbon and elemental carbon in the particulate matters is avoided.
As shown in fig. 5, in the present embodiment, a sixth control valve 23 is disposed between the output end of the particulate matter cutter 20 and the input end of the erosion device 21, and a particulate matter filter 24 for filtering particulate matter in air to obtain blank sample gas is connected to the input end of the sixth control valve 23. And controlling a sixth control valve 23 to communicate the input end of the erosion device 21 with the output end of the particulate filter 24, filtering particulate matters in the air through the particulate filter 24 to obtain blank sample gas, and performing a subsequent detection process consistent with a normal detection process so as to perform a full-flow blank to check the running reliability of the OCEC analysis system.
As shown in fig. 5, in the present embodiment, the output end of the carrier gas pipeline 15 is communicated with the input end of the fifth control valve 22, and the first heating device 25 for heating the erosion device 21 to release the gaseous organic matters adsorbed by the erosion device 21 when the carrier gas in the carrier gas pipeline 15 flows into the erosion device 21 through the fifth control valve 22 is disposed outside the erosion device 21. The efficiency of the erosion device 21 is reduced after the erosion device 21 is used for a period of time, and the erosion device 21 is in an activated carbon structure and adopts physical adsorption. When the first heating device 25 is installed outside the erosion device 21 and the erosion device 21 needs to be regenerated, the fifth control valve 22 is controlled to communicate the output end of the carrier gas pipeline 15 with the erosion device 21, the carrier gas flows into the erosion device 21 through the carrier gas pipeline 15, the erosion device 21 is reversely purged, the erosion device 21 is heated through the first heating device 25, the temperature of the first heating device 25 is controlled to be a certain proper temperature (for example, 260 ℃), and the gaseous organic matters adsorbed in the erosion device 21 are released from the erosion device 21, so that the erosion device 21 is regenerated without detaching the erosion device 21, and the adsorption efficiency of the erosion device 21 is ensured. Alternatively, the first heating device 25 employs a heating wire or a PTC heater.
As shown in FIG. 5, in the present embodiment, the sample furnace includes an outer tube 26, an inner tube 27 disposed in the outer tube 26 for fixing the filter membrane 1 in the outer tube 26, and a second heating device 28 disposed outside the outer tube 26 for heating the filter membrane 1. The inner tube 27 compresses and fixes the filter membrane 1 at the step position in the outer tube 26, gas such as sample gas, carrier gas and the like flows into the inner tube 27 and then passes through the filter membrane 1, and the second heating device 28 can heat the filter membrane 1. Optionally, the second heating device 28 employs heating wires. Optionally, a fan is disposed outside the second heating device 28 to dissipate heat of the second heating device 28.
As shown in fig. 5, in the present embodiment, the output end of the carrier gas line 15 is communicated with a purge line 29 which is communicated with the gap between the outer tube 26 and the inner tube 27 and is used for purging air in the gap by using helium gas output from the carrier gas line 15, and a seventh control valve 30 is provided on the purge line 29. A gap exists between the outer tube 26 and the inner tube 27, and air in the gap cannot be purged through the air line 15, forming a purge dead volume. The air in the gap once flows into the inner tube 27 affects the detection of organic carbon and elemental carbon. The helium gas output from the carrier gas pipeline 15 is controlled by the seventh control valve 30 to sweep the air in the gap through the sweeping pipeline 29, so as to achieve the purpose of removing residual oxygen.
As shown in fig. 5, in the present embodiment, an input end of the carrier gas pipeline 15 is communicated with a carrier gas bottle 31 for providing carrier gas, an input end of the helium-oxygen pipeline 16 is communicated with a helium-oxygen bottle 32 for providing a mixed gas of helium and oxygen, a valve bank 33 is arranged on the carrier gas pipeline 15, and an output end of the helium-oxygen pipeline 16 is communicated with an input end of the valve bank 33. The mixed gas of helium and oxygen output from the helium-oxygen bottle 32 flows into the helium-oxygen pipeline 16 and then is communicated with the input end of the sample furnace through the valve group 33 and the gas carrying pipeline 15, so that the flow path design can be simplified. Optionally, the output end of the valve set 33 is communicated with a flow controller 34 for measuring the flow rate of the carrier gas or the mixed gas. The flow rate of the carrier gas or the mixed gas is measured by the flow controller 34 to control the flow rate of the outputted carrier gas or mixed gas.
As shown in fig. 5, in the present embodiment, a light splitting sheet 35 is disposed on the output light path of the laser 17, and the detecting device includes a first detector 36 for receiving the laser light transmitted through the filter membrane 1 and detecting the light intensity of the laser light, and a second detector 37 for receiving the laser light reflected by the filter membrane 1 and the light splitting sheet 35 and detecting the light intensity of the laser light. The laser 17 emits laser, the laser irradiates the filter membrane 1 through the beam splitter 35, a part of the laser penetrates the filter membrane 1 and is received and detected by the first detector 36, and the other part of the laser is reflected by the filter membrane 1 and the beam splitter 35 and is received and detected by the second detector 37. The discrimination points of the organic carbon and the element carbon are judged through the transmission light intensity and the reflection light intensity, and the discrimination point judgment is more accurate.
As shown in fig. 5, in the present embodiment, an eighth control valve 38 is provided between the output end of the oxidation furnace 18 and the input end of the carbon dioxide sensor 19, so that the airtightness of the OCEC analysis system is checked by closing the eighth control valve 38 and other valves. If the air tightness of the OCEC analysis system is not good, the environmental air flows into the sample furnace, which can affect the detection of organic carbon and element carbon. The eighth control valve 38 and other valves (e.g., the sixth control valve 23, the valve block 33, etc.) are closed to seal the entire flow path of the OCEC analysis system, and the pressure in the flow path is observed through the pressure sensor reading in the flow path after pressurizing the flow path, thereby achieving the airtightness test of the entire flow path.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A quality control device is characterized in that,
the device comprises a spray pipe (2) extending into a sample furnace and extending to a filter membrane (1), a standard solution quantifying device (3) communicated with the input end of the spray pipe (2) and used for providing a quantitative standard solution, and a carrier gas device (4) communicated with the input end of the standard solution quantifying device (3) and used for providing a carrier gas to spray the quantitative standard solution in the standard solution quantifying device (3) onto the filter membrane (1).
2. The quality control device according to claim 1,
the standard liquid quantifying device (3) comprises a standard liquid device (5) for providing standard solution, a first control valve (6) communicated with the output end of the carrier gas device (4) and the output end of the standard liquid device (5) respectively, a quantifying device (7) communicated with the output end of the first control valve (6), a second control valve (8) communicated with the output end of the quantifying device (7) and the input end of the spray pipe (2) respectively, and an emptying pipeline (9) communicated with the output end of the second control valve (8).
3. The quality control device according to claim 2,
the standard solution device (5) comprises a standard solution bottle (10), a third control valve (11) which is respectively communicated with the output end of the standard solution bottle (10) and the input end of the first control valve (6), an ultra-pure water bottle (12) and a fourth control valve (13) which is respectively communicated with the output end of the ultra-pure water bottle (12) and the input end of the first control valve (6); or
The standard solution device (5) comprises a plurality of standard solution bottles (10) which are respectively communicated with the input ends of the first control valves (6) and are used for storing standard solutions with different concentrations.
4. An OCEC analysis system, characterized in that,
comprises a sampling pipeline (14), a sample furnace arranged on the sampling pipeline (14) and a filter membrane (1) arranged in the sample furnace and used for collecting particles in sample gas,
the input end of the sample furnace is respectively communicated with a gas loading pipeline (15) and a helium-oxygen pipeline (16), a laser (17) and a detection device are arranged outside the sample furnace, the output end of the sample furnace is communicated with an oxidation furnace (18), the output end of the oxidation furnace (18) is communicated with a carbon dioxide sensor (19),
the OCEC analysis system further comprises a quality control device according to any one of claims 1 to 3.
5. The OCEC analysis system of claim 4,
and the sampling pipeline (14) is provided with a particulate cutter (20) for cutting and classifying particulate matters in the sample gas, an erosion device (21) communicated with the output end of the particulate cutter (20) and used for adsorbing gaseous organic matters in the sample gas, and a fifth control valve (22) respectively communicated with the output end of the erosion device (21) and the input end of the sample furnace.
6. The OCEC analysis system of claim 5,
a sixth control valve (23) is arranged between the output end of the particulate matter cutter (20) and the input end of the erosion device (21), and a particulate matter filter (24) used for filtering particulate matters in air to obtain blank sample gas is communicated with the input end of the sixth control valve (23).
7. The OCEC analysis system of claim 5,
the output end of the gas carrying pipeline (15) is communicated with the input end of the fifth control valve (22), and a first heating device (25) for heating the corrosion device (21) so as to release gaseous organic matters adsorbed by the corrosion device (21) when the carrier gas in the gas carrying pipeline (15) flows into the corrosion device (21) through the fifth control valve (22) is arranged outside the corrosion device (21).
8. The OCEC analysis system of claim 4,
the sample furnace comprises an outer tube (26), an inner tube (27) arranged in the outer tube (26) for fixing the filter membrane (1) in the outer tube (26), and a second heating device (28) arranged outside the outer tube (26) for heating the filter membrane (1).
9. The OCEC analysis system of claim 8,
and the output end of the gas carrying pipeline (15) is communicated with a purging pipeline (29) which is communicated with a gap between the outer pipe (26) and the inner pipe (27) and is used for purging air in the gap by using helium gas output by the gas carrying pipeline (15), and a seventh control valve (30) is arranged on the purging pipeline (29).
10. The OCEC analysis system of claim 4,
the input end of the carrier gas pipeline (15) is communicated with a carrier gas bottle (31) for providing carrier gas, the input end of the helium-oxygen pipeline (16) is communicated with a helium-oxygen bottle (32) for providing mixed gas of helium and oxygen, a valve bank (33) is arranged on the carrier gas pipeline (15), and the output end of the helium-oxygen pipeline (16) is communicated with the input end of the valve bank (33);
the output end of the valve group (33) is communicated with a flow controller (34) for measuring the flow of the carrier gas or the mixed gas.
11. The OCEC analysis system of claim 4,
the laser device is characterized in that a light splitting sheet (35) is arranged on an output light path of the laser device (17), and the detection device comprises a first detector (36) used for receiving laser penetrating through the filter membrane (1) and detecting light intensity of the laser and a second detector (37) used for receiving the laser reflected by the filter membrane (1) and the light splitting sheet (35) and detecting the light intensity of the laser.
12. The OCEC analysis system of claim 4,
an eighth control valve (38) is provided between the output of the oxidation oven (18) and the input of the carbon dioxide sensor (19) so as to check the gas tightness of the OCEC analysis system by closing the eighth control valve (38) and other valves.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113670856A (en) * | 2021-08-13 | 2021-11-19 | 力合科技（湖南）股份有限公司 | OCEC analysis system and application method thereof |
| CN117233057A (en) * | 2023-11-16 | 2023-12-15 | 杭州朋谱科技有限公司 | Device and method for detecting particulate matters in gas |
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| CN117233057A (en) * | 2023-11-16 | 2023-12-15 | 杭州朋谱科技有限公司 | Device and method for detecting particulate matters in gas |
| CN117233057B (en) * | 2023-11-16 | 2024-02-09 | 杭州朋谱科技有限公司 | Device and method for detecting particulate matters in gas |
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