Sampling device capable of synchronously collecting multiple gas pollutants in atmosphere

Abstract

The utility model relates to a sampling device capable of synchronously collecting various gaseous pollutants in the atmosphere, which comprises a sucking pump, an air inlet of the sucking pump is connected with a three-way pipe through a pipeline, and one air inlet of the three-way pipe is sequentially connected with a two-way valve, a first flow meter and a first absorption bottle through a pipeline. The other air inlet of the three-way pipe is connected with a three-way valve through a pipeline, one air inlet of the three-way valve is sequentially connected with a second flow meter and a second absorption bottle through pipelines, and the other air inlet of the three-way valve is sequentially connected with a third flow meter and a third absorption bottle through pipelines. Three pipelines are constructed through the common three-way pipe and the three-way valve, the structure is simple, materials are convenient to take, the three pipelines are controlled through the two-way valve and the three-way valve, one to-be-detected gas pollutant can be independently collected, multiple to-be-detected gas pollutants can also be synchronously collected, operation is easy, and the collection efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the field of atmospheric pollutant collection technology, and in particular relates to a sampling device that can simultaneously collect multiple gaseous pollutants in the atmosphere. Background Technology

[0002] With the continuous increase in human activities such as industrialization and urbanization, the emission of air pollutants has also increased, posing a serious threat to the environment and human health. To effectively control air pollution, we need to dynamically monitor the concentration and distribution of air pollutants. Collecting air pollutant samples for testing is a crucial part of this process.

[0003] Generally, gaseous pollutant sampling is conducted in two main ways: direct sampling and concentration sampling. Direct sampling involves manually or automatically pumping gas samples into gas bags, bladders, or sampling bottles. This method is simple and quick, but the sampling space is limited, and it cannot enrich low-concentration gaseous pollutants. Concentration sampling, on the other hand, can enrich low-concentration gaseous pollutants. The most commonly used concentration sampling method is solution absorption, where a pumping device forces the air to be tested through an absorption tube containing an absorbent liquid at a certain flow rate. The gaseous pollutant reacts chemically or physically with the absorbent liquid, dissolving it in the liquid. However, most current sampling devices based on solution absorption are bulky, expensive, and complex to operate, making it impossible to simultaneously collect two or more gaseous pollutants with a single device, resulting in low sampling efficiency. Utility Model Content

[0004] The main objective of this invention is to propose a sampling device that can simultaneously collect multiple gaseous pollutants in the atmosphere, which can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A sampling device capable of simultaneously collecting multiple gaseous pollutants in the atmosphere includes an air pump. The air inlet of the air pump is connected to a three-way pipe via a pipeline. One air inlet of the three-way pipe is sequentially connected to a two-way valve, a first flow meter, and a first absorption bottle via a pipeline. The other air inlet of the three-way pipe is connected to a three-way valve via a pipeline. One air inlet of the three-way valve is sequentially connected to a second flow meter and a second absorption bottle via a pipeline. The other air inlet of the three-way valve is sequentially connected to a third flow meter and a third absorption bottle via a pipeline.

[0007] Preferably, the first absorption bottle and the second absorption bottle are used to absorb ozone and sulfur dioxide, respectively.

[0008] Preferably, the third absorption bottle is used to absorb nitrogen oxides, and the third absorption bottle is also connected in sequence to a fourth absorption bottle and a fifth absorption bottle.

[0009] Preferably, the first absorption bottle, the second absorption bottle, the third absorption bottle, the fourth absorption bottle, and the fifth absorption bottle each include a bottle body, a long conduit, and a short conduit. The long conduit and the short conduit are inserted into the cap of the bottle body. One end of the long conduit inside the bottle body is placed below the surface of the absorbent liquid, and the other end outside the bottle body is used to draw in air. One end of the short conduit inside the bottle body is placed above the surface of the absorbent liquid, and the other end outside the bottle body is used to connect to the corresponding pipeline.

[0010] Preferably, a control valve is installed in the pipeline between the fourth and fifth absorption bottles.

[0011] Preferably, the first flow meter, the second flow meter, and the third flow meter are all float flow meters.

[0012] Preferably, the air pump is equipped with a flow rate knob.

[0013] This invention provides a sampling device capable of simultaneously collecting multiple gaseous pollutants in the atmosphere, which has the following beneficial effects:

[0014] This invention utilizes a common three-way pipe and three-way valve to construct three pipelines, resulting in a simple structure and readily available materials. The three pipelines are controlled by two-way and three-way valves, allowing for the individual collection of one type of gaseous pollutant or the simultaneous collection of multiple pollutants. After evacuation, the amount of each pollutant can be determined by analyzing the corresponding absorbent. The total amount of air drawn in can be calculated based on the flow rates from the first, second, and third flow meters and the evacuation time. By combining the amount of each pollutant with the total air volume, the concentration of each pollutant in the atmosphere can be determined. The operation is simple and the collection efficiency is high. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the sampling device of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the absorption bottle of this utility model.

[0017] In the diagram: 1. Air pump; 2. Three-way pipe; 3. Two-way valve; 4. First flow meter; 5. First absorption bottle; 6. Three-way valve; 7. Second flow meter; 8. Second absorption bottle; 9. Third flow meter; 10. Third absorption bottle; 11. Fourth absorption bottle; 12. Fifth absorption bottle; 13. Control valve; 14. Flow rate knob; 100. Bottle body; 200. Long conduit; 300. Short conduit. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example 1

[0023] Reference Figure 1A sampling device capable of simultaneously collecting multiple gaseous pollutants in the atmosphere includes an air pump 1. The air inlet of the air pump 1 is connected to a three-way pipe 2 via a pipeline. One air inlet of the three-way pipe 2 is connected in sequence to a two-way valve 3, a first flow meter 4, and a first absorption bottle 5 via a pipeline. The other air inlet of the three-way pipe 2 is connected to a three-way valve 6 via a pipeline. One air inlet of the three-way valve 6 is connected in sequence to a second flow meter 7 and a second absorption bottle 8 via a pipeline. The other air inlet of the three-way valve 6 is connected in sequence to a third flow meter 9 and a third absorption bottle 10 via a pipeline.

[0024] This device can be used to collect one or more gaseous pollutants. The first absorption bottle 5, the second absorption bottle 8, and the third absorption bottle 10 respectively contain specific absorption liquids for absorbing various gaseous pollutants to be tested. The absorption liquids can be used to enrich gaseous pollutants with low concentrations.

[0025] Here is a specific usage method:

[0026] When collecting a gaseous pollutant to be tested, the corresponding absorbent is placed in the first absorption bottle 5, the two-way valve 3 is opened, and the three-way valve 6 is completely closed, so that only the pipelines between the air pump 1, the three-way pipe 2, the first flow meter 4, and the first absorption bottle 5 are connected in the sampling device. The air pump 1 is turned on to draw air in at a certain flow rate into the first absorption bottle 5. The gaseous pollutant to be tested in the air is absorbed by the absorbent in the first absorption bottle 5. After the air is drawn in, the amount of the gaseous pollutant to be tested can be obtained by analyzing the absorbent. The total amount of air drawn in can be obtained based on the flow rate of the first flow meter 4 and the air drawing time. The concentration of the gaseous pollutant to be tested in the atmosphere can be determined based on the amount of the gaseous pollutant to be tested and the total amount of air.

[0027] When collecting samples of two different gaseous pollutants, corresponding absorbent liquids are placed in the first absorption bottle 5 and the second absorption bottle 8, respectively. The two-way valve 3 is opened, and the three-way valve 6 is adjusted to connect the pipelines between the vacuum pump 1, the three-way pipe 2, the first flow meter 4, and the first absorption bottle 5, as well as the pipelines between the vacuum pump 1, the three-way pipe 2, the second flow meter 7, and the second absorption bottle 8. The vacuum pump 1 is then turned on to draw air in at a certain flow rate into the first absorption bottle 5 and the second absorption bottle 8. The two gaseous pollutants in the air are absorbed by the absorbent liquids in the first and second absorption bottles 5 and 8, respectively. After the vacuuming is complete, the amount of the two gaseous pollutants can be determined by analyzing the corresponding absorbent liquids. The total amount of air drawn in can be determined based on the flow rates of the first and second flow meters 4 and the vacuuming time. Based on the amount of the two gaseous pollutants and the total amount of air, the concentrations of the two gaseous pollutants in the atmosphere can be determined.

[0028] When collecting three different gaseous pollutants to be tested, the corresponding absorbent liquids are filled into the first absorption bottle 5, the second absorption bottle 8, and the third absorption bottle 10, respectively. The two-way valve 3 is opened, and the three-way valve 6 is adjusted to connect the pipelines between the air pump 1, the three-way pipe 2, the first flow meter 4, and the first absorption bottle 5; the pipelines between the air pump 1, the three-way pipe 2, the second flow meter 7, and the second absorption bottle 8; and the pipelines between the air pump 1, the three-way pipe 2, the third flow meter 9, and the third absorption bottle 10. The air pump 1 is turned on to draw air, and the air is drawn into the first absorption bottle 5, the second absorption bottle 8, and the third absorption bottle 10 at a certain flow rate. The three gaseous pollutants to be tested in the air are absorbed by the absorbent liquids in the first absorption bottle 5, the second absorption bottle 8, and the third absorption bottle 10, respectively. After the gas extraction is completed, the amount of the three gaseous pollutants to be tested can be obtained by analyzing the corresponding absorbent. The total amount of air drawn in can be obtained based on the flow rates of the first flow meter 4, the second flow meter 7 and the third flow meter 9 and the gas extraction time. The concentration of the three gaseous pollutants to be tested in the atmosphere can be determined based on the amount of the three gaseous pollutants to be tested and the total amount of air.

[0029] This invention constructs three pipelines using a commonly used three-way pipe 2 and a three-way valve 6, resulting in a simple structure and readily available materials. The three pipelines are controlled by a two-way valve 3 and a three-way valve 6, allowing for the individual collection of one type of gaseous pollutant or the simultaneous collection of multiple types. After the gas extraction is complete, the amount of each gaseous pollutant can be determined by analyzing the corresponding absorbent. The total amount of air drawn in can be calculated based on the flow rates of the first flow meter 4, the second flow meter 7, and the third flow meter 9, as well as the extraction time. Based on the amount of each gaseous pollutant and the total amount of air, the concentration of each gaseous pollutant in the atmosphere can be determined. The operation is simple and the collection efficiency is high.

[0030] Example 2

[0031] In this embodiment, the main gaseous pollutants are nitrogen oxides (NO2, NO), ozone (O3), and sulfur dioxide (SO2).

[0032] The first absorption bottle 5 and the second absorption bottle 8 are used to absorb ozone and sulfur dioxide, respectively. The first absorption bottle 5 and the second absorption bottle 8 can be filled with potassium iodide solution and formaldehyde buffer solution, respectively.

[0033] The third absorption bottle 10 is used to absorb nitrogen oxides. The third absorption bottle 10 is also connected in sequence to a fourth absorption bottle 11 and a fifth absorption bottle 12. The third absorption bottle 10 and the fifth absorption bottle 12 are both filled with a mixture of aminobenzenesulfonic acid and naphthylethylenediamine hydrochloride to absorb NO2. The fourth absorption bottle 11 is filled with potassium permanganate solution to oxidize NO to NO2, which is then absorbed by the solution in the third absorption bottle 10.

[0034] Example 3

[0035] Reference Figure 2 The first absorption bottle 5, the second absorption bottle 8, the third absorption bottle 10, the fourth absorption bottle 11, and the fifth absorption bottle 12 each include a bottle body 100, a long conduit 200, and a short conduit 300. The long conduit 200 and the short conduit 300 are inserted into the cap of the bottle body 100. One end of the long conduit 200 inside the bottle body 100 is placed below the surface of the absorbent liquid to allow air to fully contact the absorbent liquid, while the other end outside the bottle body 100 is used to draw in air. One end of the short conduit 300 inside the bottle body 100 is placed above the surface of the absorbent liquid, while the other end outside the bottle body 100 is used to connect to the corresponding pipeline.

[0036] In this embodiment, the three-way pipe 2 is a rigid PVC pipe with an outer diameter of 10mm and an inner diameter of 8mm. The bottle bodies 100 of the first absorption bottle 5, the second absorption bottle 8, the third absorption bottle 10, the fourth absorption bottle 11, and the fifth absorption bottle 12 are made of high borosilicate glass with an inner diameter of 20mm, an outer diameter of 27mm, and a length of 15cm. They are equipped with scale lines inside to accurately control the amount of absorbent liquid. The long conduit 200 has a pointed end inside the bottle body 100 with an inner diameter of 2.5mm, and a right-angled end outside the bottle body 100 with an inner diameter of 4mm. The total length of the long conduit 200 is 13.5cm, and the total length of the short conduit 300 is 5cm. The air pump 1 is a portable electric air pump 1 powered by an internal battery, making the entire device lightweight and easy to carry, and suitable for collecting outdoor gaseous pollutants.

[0037] A control valve 13 is provided in the pipeline between the fourth absorption bottle 11 and the fifth absorption bottle 12, which can further control the opening and closing of the pipeline.

[0038] The first flow meter 4, the second flow meter 7, and the third flow meter 9 are all float flow meters. The float flow meters have scale lines and can observe the actual flow rate of the gas.

[0039] The air pump 1 is equipped with a flow rate knob 14, which can be adjusted to control the air flow rate.

[0040] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sampling device capable of simultaneously collecting multiple gaseous pollutants from the atmosphere, characterized in that: The device includes an air pump, the air inlet of which is connected to a three-way pipe via a pipeline. One air inlet of the three-way pipe is connected in sequence to a two-way valve, a first flow meter, and a first absorption bottle via a pipeline. The other air inlet of the three-way pipe is connected to a three-way valve via a pipeline. One air inlet of the three-way valve is connected in sequence to a second flow meter and a second absorption bottle via a pipeline. The other air inlet of the three-way valve is connected in sequence to a third flow meter and a third absorption bottle via a pipeline.

2. The sampling device for simultaneously collecting multiple gaseous pollutants in the atmosphere according to claim 1, characterized in that: The first absorption bottle and the second absorption bottle are used to absorb ozone and sulfur dioxide, respectively.

3. A sampling device capable of simultaneously collecting multiple gaseous pollutants in the atmosphere according to claim 2, characterized in that: The third absorption bottle is used to absorb nitrogen oxides, and the third absorption bottle is also connected in sequence to a fourth absorption bottle and a fifth absorption bottle.

4. A sampling device capable of simultaneously collecting multiple gaseous pollutants in the atmosphere according to claim 3, characterized in that: The first, second, third, fourth, and fifth absorption bottles each include a bottle body, a long conduit, and a short conduit. The long conduit and the short conduit are inserted into the cap of the bottle body. One end of the long conduit inside the bottle body is below the surface of the absorbent liquid, and the other end outside the bottle body is used to draw in air. One end of the short conduit inside the bottle body is above the surface of the absorbent liquid, and the other end outside the bottle body is used to connect to the corresponding pipeline.

5. A sampling device for simultaneously collecting multiple gaseous pollutants in the atmosphere according to claim 3, characterized in that: A control valve is installed in the pipeline between the fourth and fifth absorption bottles.

6. A sampling device capable of simultaneously collecting multiple gaseous pollutants in the atmosphere according to claim 1, characterized in that: The first flow meter, the second flow meter, and the third flow meter are all float flow meters.

7. A sampling device for simultaneously collecting multiple gaseous pollutants in the atmosphere according to claim 1, characterized in that: The air pump is equipped with a flow rate knob.

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