CN113432932A - Catering oil smoke pollutant sampling device - Google Patents
Catering oil smoke pollutant sampling device Download PDFInfo
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- CN113432932A CN113432932A CN202110636915.1A CN202110636915A CN113432932A CN 113432932 A CN113432932 A CN 113432932A CN 202110636915 A CN202110636915 A CN 202110636915A CN 113432932 A CN113432932 A CN 113432932A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
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Abstract
The invention relates to the technical field of environmental waste gas monitoring, and provides a catering oil fume pollutant sampling device, which comprises: the sampling gun is provided with three air extraction connectors at a first end, three connecting pipes are arranged in the sampling gun, the first ends of the three connecting pipes are respectively connected with the three air extraction connectors, and second ends of the three connecting pipes extend to the outside of a second end of the sampling gun and are respectively connected with a particulate matter sampling head, an oil smoke sampling head and a non-methane total hydrocarbon sampling head; the sampling host comprises an air extractor and a vacuum box, wherein the air extractor is respectively connected with the particulate matter sampling head, the oil smoke sampling head and the vacuum box through pipelines; an air bag is arranged in the vacuum box and is connected with a non-methane total hydrocarbon sampling head through a pipeline. The invention can simultaneously collect three pollutants of particulate matters, oil smoke and non-methane total hydrocarbons, synchronously collect parameters such as the flow rate and the temperature of the smoke and improve the sampling efficiency.
Description
Technical Field
The invention relates to the technical field of environmental waste gas monitoring, in particular to a catering oil fume pollutant sampling device.
Background
With the continuous acceleration of the industrialization process of urban built-up areas and the continuous promotion of various air pollution prevention measures, the catering oil fume pollution becomes an important source of PM2.5 in the ambient air in cities, especially the physical and chemical characteristics of the catering oil fume are complex, and during the cooking process of food, oil, various organic substances are changed into discharged substances through physical or chemical changes, and various toxic and harmful substances generated by the combustion of cooking fuels are directly discharged to densely populated areas, thereby polluting the environment and influencing the health of human bodies. Therefore, it is necessary to monitor a plurality of pollutants in the cooking fumes simultaneously, and the pollutants mainly include: soot, particulates and non-methane total hydrocarbons, and the like. At present, when carrying out the on-the-spot monitoring sampling to above-mentioned pollutant, need carry three kinds of sampling equipment at least and sample alone respectively, simultaneously because resident family's flue pipe diameter is less, three kinds of sampling equipment hardly insert simultaneously and sample in the flue, do not possess the simultaneity promptly, lead to the sampling time long, inefficiency, in addition, resident's culinary art process's peak discharge time is shorter, and the sampling is difficult to obtain comparatively accurate test data respectively.
Disclosure of Invention
The invention provides a catering oil fume pollutant sampling device which can simultaneously collect three pollutants including particulate matters, oil fume and non-methane total hydrocarbon, synchronously collect parameters such as the flow rate and the temperature of the smoke gas and the like, can better adapt to the characteristics of instantaneity, intermittence and the like of the emission of catering oil fume pollutants, reduces the sampling time cost and the labor cost and improves the sampling efficiency.
The invention provides a catering oil smoke pollutant sampling device, which comprises: the sampling gun is characterized in that three air extraction connectors are arranged at the first end of the sampling gun, three connecting pipes are arranged in the sampling gun, the first ends of the three connecting pipes are respectively connected with the three air extraction connectors, and the second ends of the three connecting pipes extend to the outside of the second end of the sampling gun and are respectively connected with a particulate matter sampling head, an oil smoke sampling head and a non-methane total hydrocarbon sampling head; the sampling host comprises an air extracting device and a vacuum box, wherein the air extracting device is connected with an air extracting connector connected with the particulate matter sampling head through a first pipeline, and the air extracting device is connected with an air extracting connector connected with the oil smoke sampling head through a second pipeline; the vacuum box is connected with the air extractor through a third pipeline, an air bag is arranged in the vacuum box, and the air bag is connected with an air extraction connector connected with the non-methane total hydrocarbon sampling head through a fourth pipeline.
According to the catering oil fume pollutant sampling device provided by the invention, the first end of the sampling gun is provided with the operating handle, the operating handle comprises a connecting seat and a handle, the three air extraction connecting heads are arranged on the connecting seat, the first ends of the three connecting pipes are positioned in the connecting seat, and the handle is arranged on the connecting seat.
According to the catering oil fume pollutant sampling device provided by the invention, two pitot tubes are arranged in the sampling gun, the connecting ends of the two pitot tubes extend into the connecting seat and are respectively connected with two air pressure connectors on the connecting seat, the pressure measuring ends of the two pitot tubes are positioned outside the second end of the sampling gun, and the direction of the ports of the pressure measuring ends of the two pitot tubes is opposite.
According to the catering oil fume pollutant sampling device provided by the invention, a temperature measuring element is arranged on the pressure measuring end of at least one pitot tube, and the temperature measuring element is connected with a temperature measuring connector on the connecting seat through a lead in the sampling gun.
According to the catering oil fume pollutant sampling device provided by the invention, the sampling host machine further comprises a box body, the air exhaust device and the vacuum box are arranged in the box body, a temperature sensor, a pressure sensor and a control system are further arranged in the box body, the temperature sensor is connected with the temperature measurement connector, the pressure sensor is connected with the air pressure connector, and the control system is respectively connected with the air exhaust device, the temperature sensor and the pressure sensor.
According to the catering oil fume pollutant sampling device provided by the invention, flowmeters are respectively arranged on the first pipeline and the second pipeline, the flowmeters are connected with the control system, and control valves are respectively arranged on the first pipeline, the second pipeline and the third pipeline and are connected with the control system.
According to the catering oil fume pollutant sampling device provided by the invention, the gun body of the sampling gun is a heating sleeve.
According to the catering oil smoke pollutant sampling device provided by the invention, a particle collecting filter element is arranged in the particle sampling head, and an oil smoke droplet collecting metal filter cylinder is arranged in the oil smoke sampling head.
According to the catering oil fume pollutant sampling device provided by the invention, the non-methane total hydrocarbon sampling head is connected with the second end of the connecting pipe through the filtering device.
According to the catering oil fume pollutant sampling device provided by the invention, the non-methane total hydrocarbon sampling head is lined with the polytetrafluoroethylene layer.
According to the catering oil fume pollutant sampling device provided by the invention, the particulate matter sampling head, the oil fume sampling head and the non-methane total hydrocarbon sampling head are integrally arranged on the sampling gun, the sampling gun is stretched into the flue and is exhausted by the air exhaust device, three pollutants of particulate matter, oil fume and non-methane total hydrocarbon can be simultaneously collected, the characteristics of instantaneity, intermittence and the like of the emission of catering oil fume pollutants can be better adapted, negative pressure is formed in the vacuum box by the air exhaust device, the non-methane total hydrocarbon gas enters the gas bag due to the pressure difference to improve the sampling amount, parameters such as the flow rate, the temperature and the like of the smoke gas can be synchronously collected by the pitot tube and the temperature measuring element, the sampling time cost and the labor cost are reduced, and the sampling efficiency and the data accuracy are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the related art, the drawings needed to be used in the description of the embodiments or the related art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a sampling gun according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a partial enlarged view of FIG. 1 at B;
FIG. 4 is a schematic structural diagram of a sampling host provided in the present invention;
reference numerals:
1: a gun body; 2: an air extraction connector; 3: a connecting pipe; 4: a particulate matter sampling head;
5: an oil fume sampling head; 6: a non-methane total hydrocarbon sampling head; 7: an air extraction device;
8: a vacuum box; 9: a first pipeline; 10: a second pipeline; 11: a third pipeline;
12: an air bag; 13: a fourth pipeline; 14: an operating handle; 141: a connecting seat;
142: a handle; 15: a pitot tube; 151: a pressure measuring end; 16: an air pressure connector;
17: a temperature measuring element; 18: a temperature measuring connector; 19: a box body; 20: a flow meter;
21: a control valve; 22: and (4) a filtering device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "left", "right", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
According to the embodiment of the invention, as shown in fig. 1-4, the catering oil fume pollutant sampling device provided by the invention mainly comprises: sampling gun and sampling host computer. Wherein, the first end (left end) of sampling rifle is equipped with three connector 2 of bleeding, is equipped with three connecting pipes 3 in the sampling rifle, and the first end of three connecting pipes 3 links to each other with three connector 2 of bleeding respectively, and the second end of three connecting pipes 3 extends to the second of sampling rifle and holds (right-hand member) outside and be connected with particulate matter sampling head 4, oil smoke sampling head 5 and total hydrocarbon sampling head 6 of non-methane respectively.
The sampling host comprises an air extractor 7 and a vacuum box 8, the air extractor 7 is connected with an air extraction connector 2 connected with the particulate matter sampling head 4 through a first pipeline 9 to form a particulate matter sampling flow channel, and the air extractor 7 is connected with the air extraction connector 2 connected with the oil smoke sampling head 5 through a second pipeline 10 to form an oil smoke sampling flow channel; the vacuum box 8 is connected with the air extraction device 7 through a third pipeline 11, an air bag 12 is arranged in the vacuum box 8, and the air bag 12 is connected with the air extraction connector 2 connected with the non-methane total hydrocarbon sampling head 6 through a fourth pipeline 13 to form a non-methane total hydrocarbon sampling flow channel.
According to the embodiment of the invention, the particulate matter sampling head 4, the oil fume sampling head 5 and the non-methane total hydrocarbon sampling head 6 are integrated on the sampling gun, the sampling gun extends into a flue and is exhausted by the air exhaust device 7, so that three pollutants of particulate matter, oil fume and non-methane total hydrocarbon can be simultaneously collected, and the characteristics of instantaneity, intermittence and the like of catering oil fume pollutant emission can be better adapted; and negative pressure is formed in the vacuum box 8 through the air extractor 7, and non-methane total hydrocarbon gas enters the air bag 12 due to pressure difference so as to improve the sampling amount, reduce the sampling time cost and the labor cost, and improve the sampling efficiency and the data accuracy.
According to the embodiment of the present invention, the first end of the sampling gun is provided with an operating handle 14, the operating handle 14 includes a connecting seat 141 and a handle 142, the three suction connectors 2 are disposed on the connecting seat 141, the first ends of the three connecting pipes 3 extend into the connecting seat 141 and are respectively connected to the three suction connectors 2, and the handle 142 is disposed on the connecting seat 141. The invention is convenient to operate and use on one hand and is convenient to be butted with the sampling host machine through the pipeline on the other hand by arranging the operating handle.
According to the embodiment of the invention, two pitot tubes 15 are arranged in the sampling gun, the connecting ends (left ends) of the two pitot tubes 15 extend into the connecting seat 141 and are respectively connected with two pneumatic connectors 16 on the connecting seat 141, the pneumatic connectors 16 are connected with a pressure sensor which is described below, the pressure measuring ends 151 (right ends) of the two pitot tubes 15 are positioned outside the second end of the sampling gun, and the ports of the pressure measuring ends 151 of the two pitot tubes 15 face opposite directions. Specifically, a sampling gun is inserted into the flue to be measured, so that the port of the pressure measuring end 151 of one pitot tube 15 faces the flue gas inflow direction for measuring the dynamic pressure of the flue gas, and the port of the pressure measuring end 151 of the other pitot tube 15 faces the flue gas inflow direction for measuring the static pressure of the flue gas, thereby calculating the flow rate of the flue gas.
According to the embodiment of the invention, the temperature measuring element 17 is arranged on the pressure measuring end 151 of at least one pitot tube 15, the temperature measuring element 17 is connected with the temperature measuring connector 18 on the connecting seat 141 through a conducting wire in the sampling gun, the temperature measuring connector 18 is connected with a temperature sensor, and the temperature of the smoke is measured and read after the readings of the temperature sensor are stable.
The specific type of temperature measuring element of the present invention is not particularly limited, and in the present example, the temperature measuring element 17 is a thermocouple.
According to the embodiment of the invention, as shown in fig. 4, the sampling host further includes a box 19, the air extractor 7 and the vacuum box 8 are disposed in the box 19, the box 19 is further provided with a temperature sensor, a pressure sensor and a control system, the temperature sensor is connected to the temperature measuring connector 18, the pressure sensor is connected to the air pressure connector 16, and the control system is respectively connected to the air extractor 7, the temperature sensor and the pressure sensor. Specifically, the flow velocity of the flue gas can be calculated through the dynamic pressure, the static pressure and the temperature of the flue gas, and the flow velocity information is stored in a control system in real time to be sampled and used at a constant speed. In the present example, the air extraction device 7 is an air extraction pump.
The first pipeline 9 and the second pipeline 10 are respectively provided with a flow meter 20, and the flow meters 20 are connected with a control system; and the first pipeline 9, the second pipeline 10 and the third pipeline 11 are respectively provided with a control valve 21, and the control valves 21 are connected with a control system. Specifically, the control valve 21 retrieves flow rate information in the control system and adjusts the opening degree, so that the flow rate information in the flow meter 20 and the flow rate information in the control system are consistent, and the purpose of constant-speed sampling is achieved.
In one embodiment, the flow meter 20 measures flow in a range of 0.5 to 10L/min with a precision of 0.1L/min.
According to the embodiment of the invention, the gun body 1 of the sampling gun is a heating sleeve, has a heating function and can be heated to 120 ℃. The connecting pipe 3 is wrapped in the heating sleeve for heat preservation so as to prevent gas from condensing.
According to the embodiment of the invention, a filter element is arranged in the particle sampling head 4, and a quartz filter membrane is arranged in the filter element and is used for collecting particles; and the diameter of the particulate matter sampling head is 40-45 mm.
In a specific example, the first pipeline 9 is a rubber pipe, the rubber pipe is in butt joint with the air extraction connector 2 connected with the particulate matter sampling head 4, the air extraction pump is started, the control valve 21 is opened, the flue gas flow rate information in the control system is called, and the flow rate information in the flowmeter 20 and the flow rate information in the control system are consistent by adjusting the opening degree of the control valve 21, so that the purpose of constant-speed sampling is achieved. And after the collection is finished, taking down the filter element and putting the filter element into a sealing bag for storage. And (4) drying after conveying to a laboratory, weighing the mass, obtaining the mass of the filter element after sampling after constant weight, subtracting the mass of the filter element before sampling, dividing the mass by the standard dry sampling volume, and calculating to obtain the mass concentration of the particulate matters.
According to the embodiment of the invention, the diameter of the oil fume sampling head 5 is 25-30 mm, and the length is 45-50 mm. In addition, a metal filter cylinder is arranged in the oil smoke sampling head 5 and is used for collecting oil smoke fog drops. The diameter of the metal filter cylinder is 15-20 mm.
In a specific example, the second pipeline 10 is a rubber pipe, the rubber pipe is in butt joint with an air extraction connector 2 connected with the oil smoke sampling head 5, an air extraction pump is started, the control valve 21 is opened, the flow rate information of the smoke in the control system is obtained, and the flow rate information in the flowmeter 20 and the flow rate information in the control system are consistent by adjusting the opening degree of the control valve 21, so that the purpose of constant-speed sampling is achieved. And after the sample is collected, immediately transferring the metal filter cylinder into a polytetrafluoroethylene cleaning cup, and tightly covering the cup cover. Transporting to laboratory, ultrasonic cleaning with carbon tetrachloride, transferring into colorimetric tube, fixing volume, and infrared spectrophotometry at wave number of 2930cm-1、2960cm-1And 3030cm-1And (4) measuring the absorbance at the spectral band, further calculating the content of the oil smoke, dividing the content of the oil smoke by the sampling volume of the standard trunk, and calculating the mass concentration of the oil smoke.
According to the embodiment of the invention, the non-methane total hydrocarbon sampling head 6 is connected with the second end of the connecting pipe 3 through the filtering device 22, and the filtering device 22 is used for filtering dust particles in the gas, so that the purity of the gas is improved, and the accuracy of the detection data is further improved.
In addition, the polytetrafluoroethylene layer is lined in the non-methane total hydrocarbon sampling head 6, so that the reaction with organic components in the smoke can be avoided.
In one specific example, the fourth pipeline 13 is a polytetrafluoroethylene pipe, and the polytetrafluoroethylene pipe is butted with a suction connector 2 connected with a non-methane total hydrocarbon sampling head 6. The air bag 12 is put into the vacuum box 8 and connected with the polytetrafluoroethylene tube, the switch of the air bag 12 is opened, and the vacuum box 8 is closed. And starting the air pump, opening the control valve 21, pumping air in the vacuum box 8 to enable the vacuum box 8 to generate negative pressure, and enabling gas in the flue to enter the air bag 12 for sampling under the action of pressure difference between the inside and the outside of the vacuum box 8. After the sample is collected, the vacuum box 8 is opened, the switch of the air bag 12 is closed, and the air bag 12 is immediately placed into a light-proof heat-preservation container for preservation. The non-methane total hydrocarbon mass concentration in the exhaust gas was analyzed by a gas chromatograph with a hydrogen flame ionization detector after transport to the laboratory.
In conclusion, the invention integrates the acquisition probes of three pollutants of particulate matters, oil smoke and non-methane total hydrocarbons into one set of device, and has the functions of acquiring the smoke parameters such as smoke flow rate, temperature and the like, thereby improving the simultaneity and sampling efficiency of the oil smoke pollutant sampling process.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A catering oil smoke pollutant sampling device, which is characterized by comprising:
the sampling gun is characterized in that three air extraction connectors are arranged at the first end of the sampling gun, three connecting pipes are arranged in the sampling gun, the first ends of the three connecting pipes are respectively connected with the three air extraction connectors, and the second ends of the three connecting pipes extend to the outside of the second end of the sampling gun and are respectively connected with a particulate matter sampling head, an oil smoke sampling head and a non-methane total hydrocarbon sampling head;
the sampling host comprises an air extracting device and a vacuum box, wherein the air extracting device is connected with an air extracting connector connected with the particulate matter sampling head through a first pipeline, and the air extracting device is connected with an air extracting connector connected with the oil smoke sampling head through a second pipeline; the vacuum box is connected with the air extractor through a third pipeline, an air bag is arranged in the vacuum box, and the air bag is connected with an air extraction connector connected with the non-methane total hydrocarbon sampling head through a fourth pipeline.
2. The catering oil smoke pollutant sampling device of claim 1, wherein the first end of the sampling gun is provided with an operating handle, the operating handle comprises a connecting seat and a handle, the three air suction connectors are arranged on the connecting seat, the first ends of the three connecting pipes are located in the connecting seat, and the handle is arranged on the connecting seat.
3. The catering oil smoke pollutant sampling device of claim 2, wherein two pitot tubes are arranged in the sampling gun, the connecting ends of the two pitot tubes extend into the connecting seat and are respectively connected with two pneumatic connectors on the connecting seat, the pressure measuring ends of the two pitot tubes are located outside the second end of the sampling gun, and the direction of the ports of the pressure measuring ends of the two pitot tubes is opposite.
4. The catering oil smoke pollutant sampling device of claim 3, wherein a temperature measuring element is arranged on the pressure measuring end of at least one pitot tube, and the temperature measuring element is connected with a temperature measuring connector on the connecting seat through a lead in the sampling gun.
5. The catering oil smoke pollutant sampling device of claim 4, wherein the sampling host further comprises a box body, the air exhaust device and the vacuum box are arranged in the box body, a temperature sensor, a pressure sensor and a control system are further arranged in the box body, the temperature sensor is connected with the temperature measuring connector, the pressure sensor is connected with the air pressure connector, and the control system is respectively connected with the air exhaust device, the temperature sensor and the pressure sensor.
6. The catering oil smoke pollutant sampling device of claim 5, wherein the first pipeline and the second pipeline are respectively provided with a flow meter, the flow meters are connected with the control system, the first pipeline, the second pipeline and the third pipeline are respectively provided with a control valve, and the control valves are connected with the control system.
7. The catering oil smoke contaminant sampling device of claim 1, wherein the gun body of the sampling gun is a heating sleeve.
8. The catering oil smoke pollutant sampling device of claim 1, wherein a particulate matter collecting filter element is arranged in the particulate matter sampling head, and a metal filter cartridge for collecting oil smoke droplets is arranged in the oil smoke sampling head.
9. The catering oil smoke contaminant sampling device of claim 1, wherein the non-methane total hydrocarbon sampling head is connected to the second end of the connecting tube via a filter.
10. The catering oil smoke contaminant sampling device of claim 1, wherein the non-methane total hydrocarbon sampling head is lined with a polytetrafluoroethylene layer.
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| CN202110636915.1A CN113432932A (en) | 2021-06-08 | 2021-06-08 | Catering oil smoke pollutant sampling device |
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| CN202110636915.1A CN113432932A (en) | 2021-06-08 | 2021-06-08 | Catering oil smoke pollutant sampling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114689807A (en) * | 2022-05-31 | 2022-07-01 | 河北沃茵环保科技有限公司 | Kitchen oil smoke on-line monitoring device |
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