Novel atmospheric particulate nucleating device and atmosphere online detection device

Abstract

The utility model discloses a novel atmospheric particulate matter nucleator and an atmosphere online detection device, the novel atmospheric particulate matter nucleator comprises a nucleation unit, a condenser pipe and a first collection unit; the nucleation unit comprises a nucleation body and a gas generator; the first collecting unit comprises a first recycling bin, the first recycling bin is communicated with a nucleation cavity of the nucleation unit through a condensation pipe, and the first recycling bin is further communicated with a first liquid outlet and an air outlet hole; the atmospheric online detection device comprises a corrosion device, a second collection unit and the novel atmospheric particulate nucleating device. The device is reasonable in structure, high in particulate matter settling efficiency and beneficial to improvement of atmosphere detection precision and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of atmospheric monitoring technology, specifically a novel atmospheric particulate matter nucleator and an online atmospheric detection device. Background Technology

[0002] Air pollution detection is fundamental to air pollution control. It involves detecting soluble gases and soluble substances on the surface of particulate matter in the atmosphere.

[0003] The detection of reactive ions is of great significance for understanding air pollution, its impact on human health, and the sources of air pollution. Currently, offline detection of air samples using membrane filtration is widely used. However, offline sampling typically takes several hours to several days, making it impossible to obtain real-time data on changes in air samples. Furthermore, membrane filtration inevitably introduces experimental errors during the detection process, and it cannot meet the needs of in-depth research on the components of air pollutants.

[0004] With the development of ion chromatography and online detection technologies, the ability to simultaneously analyze multiple ionic components has become possible. Researchers have begun to explore directly converting atmospheric air into liquid samples online for simultaneous online analysis of multiple ionic components. The collection and conversion of atmospheric particulate matter typically involves first mixing the sampling gas stream with high-temperature saturated water vapor, causing the atmospheric particles to grow larger online. The grown particles are then collected using the principle of inertial impaction. Finally, a liquid sample is obtained through elution and transferred to an ion chromatograph for online analysis. However, the following problems exist: under negative pressure, the atmosphere flows through the nucleator cavity at a relatively high speed. Even with sufficient high-temperature saturated water vapor, the number of grown atmospheric particles collected is limited, resulting in a low concentration of the collected liquid, which is detrimental to improving detection accuracy and precision. Utility Model Content

[0005] This utility model discloses a novel atmospheric particulate matter nucleator and an online atmospheric detection device. It solves the technical problem in existing technologies where the concentration of the collected liquid formed by the nucleator is too low, which is detrimental to improving detection accuracy and precision. The device features a reasonable structure, high particulate matter settling efficiency, and improves the accuracy and precision of atmospheric detection. The technical solution adopted is as follows:

[0006] A novel atmospheric particulate matter nucleator includes a nucleation unit, a condenser tube, and a first collection unit;

[0007] The nucleation unit includes a nucleation body and a gas generator. The nucleation body is provided with an inverted conical nucleation cavity. The upper part of the nucleation cavity is connected to a first nucleation inlet for the sampling gas to enter and a second nucleation inlet for the atomized first absorbent liquid to enter. The gas generator is used to atomize the first absorbent liquid, and the gas generator is connected to the first absorbent liquid source and the second nucleation inlet respectively.

[0008] The first collection unit includes a first recovery chamber, which is connected to the nucleation chamber of the nucleation unit via a condenser tube. The first recovery chamber is also connected to a first drain port and a gas outlet, and the first drain port can be connected to an external analysis and detection device.

[0009] Based on the above technical solution, the condenser tube extends spirally and extends into the first recovery chamber below the liquid surface.

[0010] Based on the above technical solution, an air-cooling unit is also included, which includes a fan facing the condenser tube, and the condenser tube is made of copper.

[0011] Based on the above technical solution, the inner bottom surface of the nucleation cavity is conical, and a through hole is provided at the lower center of the inner bottom surface of the nucleation cavity, which is connected to the condenser tube.

[0012] Based on the above technical solution, the gas generator includes a semiconductor heating element and a copper heating cavity. The semiconductor heating element is arranged laterally close to the copper heating cavity, and the heating cavity is connected to the first absorbent liquid source and the second nucleation inlet.

[0013] Based on the above technical solution, the heating chamber is connected downward to the first absorbent liquid source through a pipeline, and the heating chamber is connected upward to the top of the nucleation chamber through an inverted U-shaped flow path.

[0014] An online atmospheric monitoring device includes a dissolving device, a second collection unit, and a novel atmospheric particulate nucleator as described above;

[0015] The second collection unit includes a second recovery chamber, which can be connected to an external analysis and detection device through a second drain port;

[0016] The etcher includes an inner tube and an outer tube, with a sandwich cavity formed between the inner and outer tubes for the flow of sampling gas. The sandwich cavity forms an air inlet at the top and is connected to the second recovery chamber of the second collection unit at the bottom. The upper end of the inner tube is closed, and the inner cavity of the inner tube is connected to the sandwich cavity through several through holes at the top. The second absorbent can enter the sandwich cavity from the inner cavity of the inner tube. The lower part of the sandwich cavity is connected to the nucleation cavity through a first nucleation inlet.

[0017] Based on the above technical solution, the upper end face of the inner tube is conical to guide the atmospheric flow through the interlayer cavity in a circumferential direction, and the outer wall surface of the inner tube is provided with a spirally extending protrusion.

[0018] Based on the above technical solution, the inner tube is made of acrylic material.

[0019] Based on the above technical solution, the first absorbent is deionized water, the second absorbent is hydrogen peroxide or deionized water, and the analytical detection device includes an ion chromatography detection device.

[0020] Beneficial effects

[0021] The nucleator in this invention has a reasonable structure. The nucleation chamber in the nucleation body is arranged in an inverted cone shape, and the upper part of the inverted cone is connected to the first nucleation inlet and the second nucleation inlet respectively. In this way, when the atomized first absorbent enters the nucleation chamber, the flow rate slows down instantly, which is conducive to more uniform diffusion in the nucleation chamber. When the sampling gas enters the nucleation chamber, the flow rate also slows down. In this way, the first absorbent can more fully coat the particulate matter in the sampling gas, so that more particulate matter in the sampling gas settles down and enters the first recovery chamber through the condenser, improving the atmospheric particulate matter collection efficiency. At the same time, it is also conducive to more fully absorbing soluble ions on the surface of particulate matter, ensuring the accuracy of the detection results.

[0022] In this invention, a gas generator is used to atomize the first absorbent liquid. The gas generator includes a copper heating chamber and a semiconductor heating plate. The semiconductor heating plate is small in size and occupies little space, and can achieve precise temperature control. In addition, it has better energy-saving effect compared with traditional resistance heaters. Furthermore, the copper heating chamber is connected to the top of the nucleation chamber through an inverted U-shaped flow path. After being atomized, the first absorbent liquid enters the nucleation chamber relatively smoothly after multiple collisions and buffering in the inverted U-shaped flow path, which is conducive to the atomized first absorbent liquid fully coating atmospheric particulate matter.

[0023] The online detection device of this invention has a reasonable structure, including an etcher, a nucleator, and a second collection unit. It can simultaneously detect soluble gases and soluble ions on the surface of atmospheric particulate matter in the sample. It is multifunctional and easy to use. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.

[0025] Figure 1 : A three-dimensional structural diagram of the nucleation device in this utility model;

[0026] Figure 2 : A cross-sectional structural schematic diagram of the nucleating device in this utility model;

[0027] Figure 3 : A three-dimensional structural diagram of the online atmospheric detection device of this utility model;

[0028] Figure 4 : A cross-sectional structural schematic diagram of the three-dimensional view of the online atmospheric detection device in this utility model;

[0029] Figure 5 : Schematic diagram of the detection process of the online atmospheric detection device in this utility model;

[0030] Figure label:

[0031] Figure 4 middle This indicates the flow direction of the first absorbent liquid after atomization;

[0032] Figure 4 middle The direction of the second absorbent flow;

[0033] Figure 5 middle Indicates the direction of gas flow;

[0034] Figure 5 middle This indicates the direction of liquid flow. Detailed Implementation

[0035] The following description and accompanying drawings fully illustrate specific embodiments described herein to enable those skilled in the art to practice them. Some embodiments may include or substitute parts and features of other embodiments. The scope of the embodiments herein encompasses the entire scope of the claims and all available equivalents thereof. Throughout this document, the terms “first,” “second,” etc., are used only to distinguish one element from another without requiring or implying any actual relationship or order between the elements. Indeed, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a structure, apparatus, or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the structure, apparatus, or device that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.

[0036] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this document to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the document and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description herein, unless otherwise specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0037] In this document, unless otherwise stated, the term "multiple" means two or more.

[0038] In this article, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0039] In this article, the term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0040] like Figure 1 and 2 The present invention relates to a novel atmospheric particulate nucleator, comprising a nucleation unit, a condenser tube 3, and a first collection unit 4.

[0041] The nucleation unit includes a nucleation body 1 and a gas generator 2. The nucleation body 1 is provided with an inverted conical nucleation cavity 13. The upper part of the nucleation cavity 13 is connected to a first nucleation inlet 11 for the sampling gas to enter and a second nucleation inlet 12 for the atomized first absorbent liquid to enter. Specifically, the first nucleation inlet 11 is laterally connected to the nucleation cavity 13, and the second nucleation inlet 12 is located at the center of the top surface of the nucleation cavity 13.

[0042] A gas generator 2 is fixed to the outside of the nucleation body 1. The gas generator 2 is used to atomize the first absorbent liquid, and it is connected to both the first absorbent liquid source and the second nucleation inlet 12. Specifically, the gas generator 2 includes a semiconductor heating element 22 and a copper heating chamber 21. The copper heating chamber 21 has high thermal conductivity. The semiconductor heating element 22 is existing technology and can be selected by those skilled in the art according to their needs. The semiconductor heating element 22 is positioned laterally close to the copper heating chamber 21, which can accurately and efficiently control the atomization process of the first absorbent liquid, and achieves high atomization efficiency, with an atomization rate of 85-95%, providing sufficient atomization volume, such as... Figure 2As shown, the heating chamber 21 is connected downwards to the first absorbent liquid source via a pipeline, on which a first pump body is installed. The heating chamber 21 is connected upwards to the second nucleation inlet 12 at the top of the nucleation chamber 13 via an inverted U-shaped flow path. In this way, the atomized first absorbent liquid is buffered and the eddy current is dissipated as it flows through the inverted U-shaped flow path, so that the atomized first absorbent liquid diffuses more evenly in the nucleation chamber 13. This is beneficial for more fully coating atmospheric particulate matter, causing it to settle and enter the first recovery chamber 41. At the same time, it is also beneficial for effectively absorbing soluble ions on the surface of atmospheric particulate matter.

[0043] The first collection unit 4 includes a first recovery chamber 41, which is connected to the nucleation cavity 13 of the nucleation body 1 via a condenser pipe 3.

[0044] like Figure 2 As shown, the first recovery chamber 41 is also connected to a first drain port 42 and a vent 43. The first drain port 42 is located on the bottom surface of the first recovery chamber 41 and can be connected to an external analytical detection device. In this embodiment, the analytical detection device includes an ion chromatography detection device. The vent 43 is located on the top surface of the first recovery chamber 41, and a fan is also provided on the pipe connected to the vent 43 to create a negative pressure in the nucleator and the first recovery chamber 41, guiding the sampling gas to diffuse along the set flow path.

[0045] like Figure 1 As shown, the condenser tube 3 extends in a spiral shape and connects the nucleation chamber 13 and the first recovery chamber 41. The inner bottom surface of the nucleation chamber 13 is conical, and a through hole is provided at the lower center of the inner bottom surface of the nucleation chamber 13. This through hole is connected to the condenser tube 3 to reduce the residue of the mixture of the first absorbent liquid and atmospheric particulate matter in the nucleation chamber 13. The lower end of the condenser tube 3 extends below the liquid surface in the first recovery chamber 41, which can promote the further sedimentation of atmospheric particulate matter and allow the first absorbent liquid to more fully absorb the soluble ions on the surface of atmospheric particulate matter.

[0046] It also includes an air-cooling unit (not shown), which is fixed outside the first collection unit 4. In this embodiment, the air-cooling unit includes a fan facing the condenser tube 3. The condenser tube 3 is made of copper, which has good thermal conductivity and condensation effect.

[0047] like Figure 3 and 4 The illustrated online atmospheric detection device includes an ablator 5, a second collection unit 6, and a novel atmospheric particulate nucleator as described above; thus, it can simultaneously detect soluble gases and soluble ions on the surface of atmospheric particulate matter in the sample, making it multifunctional and easy to use.

[0048] The second collection unit 6 includes a second recovery chamber 61, which can be connected to an external analysis and detection device through a second drain port 62. In this embodiment, the analysis and detection device includes an ion chromatography detection device.

[0049] The etcher 5 includes an inner tube 51 and an outer tube 52. The outer tube 52 is sleeved outside the inner tube 51 and is coaxial. A sandwich cavity 53 for the flow of sampling gas is formed between the inner tube 51 and the outer tube 52. The upper end of the inner tube 51 is closed, and the sandwich cavity 53 forms an upward-facing air inlet. Figure 4 As shown, the etcher 5 is fixed above the second collection unit 6, and the interlayer cavity 53 is connected downward to the second recovery chamber 61 of the second collection unit 6. The lower part of the interlayer cavity 53 is connected to the nucleation cavity 13 through the first nucleation inlet 11. The sampling gas flows through the interlayer cavity 53 and then enters the nucleation cavity 13 through the first nucleation inlet 11.

[0050] like Figure 4 As shown, the inner tube 51 includes a connector 511 and an inner tube body 512. The connector 511 blocks the upper port of the inner tube body 512. The top surface of the connector 511 is conical to guide the atmospheric flow circumferentially through the interlayer cavity 53. The connector 511 has an axially extending main channel 5111 inside. The end of the main channel 5111 is connected to several circumferentially arranged branch channels 5112. The branch channels 5112 form guide holes on the outer wall surface of the connector 511. That is, the inner cavity of the inner tube body 512 is connected to the interlayer cavity 53 through several through holes at the top.

[0051] The inner tube body 512 is a hollow tube. The inner tube body 512 is connected to the second absorbent liquid source through a pipeline. A second pump body is provided on the pipeline. In this way, the second absorbent liquid can enter the interlayer cavity 53 from the inner cavity of the inner tube body 512 and flow along the inner wall of the interlayer cavity 53. In addition, the inner tube body 512 is made of acrylic material, and the outer wall of the inner tube body 512 is provided with a spirally extending protrusion (not shown). Under the guidance of the protrusion, the second absorbent liquid flows more slowly along the inner wall of the interlayer cavity 53 and forms a thinner liquid film that covers a larger area of ​​the inner wall of the interlayer cavity 53. This allows the second absorbent liquid to absorb soluble gases such as NO2 and SO2 in the atmosphere more fully, which helps to improve the accuracy of the detection results.

[0052] In this embodiment, the first absorbent is deionized water, and the second absorbent is hydrogen peroxide or deionized water.

[0053] Taking the detection process of an online atmospheric monitoring device as an example

[0054] like Figure 5As shown, firstly, under the action of the second pump, the second absorbent enters the interlayer cavity 53 through the inner tube body 512 and forms a liquid film on the outer wall of the interlayer cavity 53; at the same time, under the action of the fan, a negative pressure environment is formed in the inner cavity of the detection device, and the sampled air enters through the air inlet and flows through the interlayer cavity 53. The second absorbent absorbs soluble gases such as NO2 and SO2 in the air, and then the second absorbent enters the second recovery chamber 61 of the second collection unit 6 at the bottom of the interlayer cavity 53, and then enters the ion chromatography device for detection and analysis.

[0055] Under the action of the fan, the atmosphere continues to diffuse forward and enters the nucleation chamber 13 through the second nucleation inlet 12. At the same time, under the action of the first pump, the first absorbent enters the heating chamber 21 and is atomized. Under the action of pressure difference, the atomized first absorbent enters the nucleation chamber 13 downward. The atomized first absorbent coats the atmospheric particles, and the soluble ions on the surface of the atmospheric particles dissolve in the first absorbent. Then, it enters the first recovery chamber 41 of the first collection unit 4 through the condenser tube 3, and then enters the ion chromatography device for detection and analysis. Meanwhile, the remaining sampled air is discharged outward through the air outlet 43.

[0056] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A novel atmospheric particulate matter nucleator characterized in that, It includes a nucleation unit, a condenser (3), and a first collection unit (4); The nucleation unit includes a nucleation body (1) and a gas generator (2). The nucleation body (1) is provided with an inverted conical nucleation cavity (13). The upper part of the nucleation cavity (13) is connected to a first nucleation inlet (11) for the sampling gas to enter and a second nucleation inlet (12) for the atomized first absorbent liquid to enter. The gas generator (2) is used to atomize the first absorbent liquid, and the gas generator (2) is connected to the first absorbent liquid source and the second nucleation inlet (12) respectively. The gas generator (2) includes a semiconductor heating element (22) and a copper heating chamber (21). The semiconductor heating element (22) is arranged laterally close to the copper heating chamber (21). The heating chamber (21) is connected to the first absorbent liquid source and the second nucleation inlet (12). The heating chamber (21) is connected downward to the first absorbent liquid source through a pipeline, and a first pump body is provided on the pipeline; The first collection unit (4) includes a first recovery chamber (41), which is connected to the nucleation chamber (13) of the nucleation unit through a condenser tube (3). The first recovery chamber (41) is also connected to a first drain port (42) and a gas outlet (43). The first drain port (42) can be connected to an external analysis and detection device. A fan is also provided on the pipeline connected to the air outlet (43) to create a negative pressure in the nucleator and the first recovery chamber (41) to guide the sampling gas to diffuse along the set flow path; Under the action of pressure difference, the atomized first absorbent liquid enters the nucleation chamber (13) downwards.

2. The novel atmospheric particulate nucleator according to claim 1, characterized in that, The condenser tube (3) extends spirally and extends into the first recovery chamber (41) below the liquid surface.

3. The novel atmospheric particulate nucleator according to claim 2, characterized in that, It also includes an air-cooling unit, which includes a fan facing the condenser tube (3), the condenser tube (3) being made of copper.

4. The novel atmospheric particulate nucleator according to claim 1, characterized in that, The inner bottom surface of the nucleation cavity (13) is conical, and a through hole is provided at the lower center of the inner bottom surface of the nucleation cavity (13), which is connected to the condenser tube (3).

5. The novel atmospheric particulate matter nucleator according to any one of claims 1 to 4, characterized in that, The heating chamber is connected to the top of the nucleation chamber (13) via an inverted U-shaped flow path.

6. An atmospheric on-line detection device, characterized by, It includes a dissolving device (5), a second collection unit (6), and a novel atmospheric particulate nucleator as described in any one of claims 1 to 4; The second collection unit (6) includes a second recovery chamber (61), which can be connected to an external analysis and detection device through a second drain port (62); The etcher (5) includes an inner tube (51) and an outer tube (52). A sandwich cavity (53) for sampling gas to flow is formed between the inner tube (51) and the outer tube (52). The sandwich cavity (53) forms an air inlet at the top and is connected to the second recovery chamber (61) of the second collection unit (6) at the bottom. The upper end of the inner tube (51) is closed. The inner cavity of the inner tube (51) is connected to the sandwich cavity (53) through several through holes at the top. The second absorbent can enter the sandwich cavity (53) from the inner cavity of the inner tube (51). The lower part of the sandwich cavity (53) is connected to the nucleation chamber (13) through the first nucleation inlet (11). The inner cavity of the inner tube (51) is connected to the second absorbent liquid source through a pipeline, and a second pump body is provided on the pipeline.

7. The atmospheric on-line detection device according to claim 6, characterized in that, The upper end face of the inner tube (51) is conical to guide the atmospheric flow through the interlayer cavity (53) in a circumferential direction, and the outer wall of the inner tube (51) is provided with a spirally extending protrusion.

8. The atmospheric on-line detection device according to claim 7, characterized in that, The inner tube (51) is made of acrylic material.

9. The atmospheric on-line detection device according to claim 7 or 8, characterized in that, The first absorbent is deionized water, the second absorbent is hydrogen peroxide or deionized water, and the external analytical detection device includes an ion chromatography detection device.

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