Online trapping and extracting device for water-soluble components in gas

Abstract

The utility model discloses an on-line trapping and extracting device for water-soluble components in gas, which comprises a box body, and a movable seat, an elution component and a first driving unit are arranged in the box body; an enrichment assembly, a turntable and a second driving unit are arranged on the movable seat, the second driving unit can drive the turntable to rotate, and a filter membrane is arranged at the tail end of the support plate; the enrichment assembly can enrich water-soluble components in the gas on the filter membrane; the elution assembly comprises a first pool body, a second pool body and an ultrasonic generator, the second pool body is sleeved with the first pool body, and ultrasonic waves emitted by the ultrasonic generator can be transmitted to eluent in the second pool body through liquid in the first pool body. The device is reasonable in structure, flexible to use, low in detection cost and beneficial to improving the detection precision.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection, in particular to an online capture and extraction device for water-soluble components in gas. Background Art

[0002] The detection of water-soluble components in gases is widely used in many fields of production, such as environmental protection, industrial production, medical health, aerospace, and scientific research. By enriching and eluting water-soluble substances in the gas and obtaining the extract, the water-soluble substances in the gas can be qualitatively and quantitatively detected.

[0003] In existing equipment for enriching and extracting water-soluble substances in gases, ultrapure water is usually used to ultrasonically elute the water-soluble substances enriched on the filter membrane. After elution, the filter membrane must be cleaned so that the filter membrane can be recycled. There are technical problems such as a large amount of eluent (such as ultrapure water) used for elution and a low concentration of water-soluble substances in the prepared extract, which leads to great difficulty in detection and low detection accuracy. In some scenarios, the prepared extract often needs to be further processed to obtain a sample liquid suitable for subsequent testing. In addition, after the elution is completed, the filter membrane often needs to be cleaned separately, and the waste liquid generated by cleaning is difficult to handle.

[0004] Therefore, there is an urgent need for an enrichment and extraction device that is easy to operate and helps improve detection accuracy and efficiency. Utility Model Content

[0005] The utility model discloses an online capture and extraction device for water-soluble components in gas, which solves the technical problems of existing enrichment and extraction devices, such as large eluent consumption or insufficient elution, high detection costs, and poor detection accuracy. It has a reasonable structure, flexible use, low detection costs, and is conducive to improving detection accuracy. The technical solution adopted is as follows:

[0006] An online capture and extraction device for water-soluble components in gas comprises a housing, a movable seat, an elution assembly, and a first drive unit disposed within the housing. The movable seat is provided with an enrichment assembly, a turntable, and a second drive unit. The turntable comprises a plurality of radially extending and circumferentially arranged support plates, the ends of which are provided with filter membranes via clamping assemblies. The second drive unit is configured to drive the turntable to rotate. The enrichment assembly allows gas flowing through a gas cutter to pass through the filter membrane, thereby enriching the water-soluble components in the gas on the filter membrane.

[0007] The elution assembly includes a first cell body, a second cell body and an ultrasonic generator, wherein the first cell body is sleeved outside the second cell body, and the ultrasonic wave emitted by the ultrasonic generator can be transmitted to the eluent in the second cell body through the liquid in the first cell body;

[0008] The enrichment component and elution component are respectively arranged at the upper and lower ends of the turntable. When the turntable rotates to place an enriched filter membrane above the second pool body, the first driving unit can drive the movable seat to move, so that the filter membrane extends into the second pool body for elution to obtain the extract. At the same time, a clean filter membrane is enriched on it by the action of the enrichment component.

[0009] Based on the above technical solution, the inner wall surface of the second cell body is adapted to the outer edge of the clamping assembly that clamps the filter membrane, so that a small amount of eluent forms a sufficiently high liquid level height, and the liquid level height in the first cell body is not lower than the liquid level height in the second cell body.

[0010] Based on the above technical solution, the enrichment component includes an upper pressing cover, a lower pressing cover and a third driving unit. The upper pressing cover is connected to the gas cutter through a hose, and the lower pressing cover is connected to the outside world through an exhaust pipe. The third driving unit can drive the upper pressing cover and the lower pressing cover to move closer or farther away. When the upper pressing cover and the lower pressing cover are close, the upper pressing cover and the lower pressing cover can clamp the filter membrane up and down and form a closed chamber, so that the water-soluble components in the gas entering the closed chamber through the air cutter are enriched on the filter membrane.

[0011] Based on the above technical solution, the hose is designed to be tough, and when the movable seat is displaced to the lower limit position under the action of the first driving unit and the filter membrane is immersed in the eluent in the second pool body, the hose is straightened.

[0012] Based on the above technical solution, a drying filter, a flow meter, a pressure-stabilizing filter and a vacuum pump are sequentially provided along the airflow direction of the exhaust pipe. The gas diffuses along the set path under the action of the vacuum pump. The drying filter is used to dry the gas flowing through it, and the flow meter is used to monitor the size of the airflow and is electrically connected to an external controller.

[0013] Based on the above technical solution, the clamping assembly includes a lower cover and an upper cover. The lower cover is laterally fixed to the support plate, and the upper cover is sleeved in the lower cover and threadedly connected to the lower cover to press the filter membrane against the annular flange on the inner wall of the lower cover.

[0014] On the basis of the above technical solution, the filter membrane includes stainless steel metal fiber sintered felt, and the filtration pore size of the filter membrane is not greater than 2.5 μm.

[0015] On the basis of the above technical solution, an opening is provided on the side wall of the box body facing the turntable, a door panel is hinged at the opening, a vertical panel is provided in the box body, and a notch is provided on the vertical panel for the movable seat to pass through, and the vertical panel, door panel and box body together enclose independent chambers for the enrichment component, turntable and elution component to be relatively separated from other components.

[0016] On the basis of the above technical solution, the portion of the movable seat extending out of the independent chamber is covered with a dustproof cloth, and the dustproof cloth covers the gap.

[0017] On the basis of the above technical solution, it also includes a first baffle, a first optical coupler, a first position sensor and a second position sensor. The first baffle rotates synchronously with the turntable. The first optical coupler is fixed on the movable seat to identify the first baffle and can send a signal to the external controller. The first position sensor and the second position sensor are fixedly arranged and designed so that when the turntable is working normally, the first position sensor and the second position sensor can be respectively arranged on both sides of the width direction of the support plate and close to both sides of the support plate; when there is an error in the rotation angle of the turntable, the first position sensor or the second position sensor identifies the support plate and sends a signal to the external controller.

[0018] Beneficial effects

[0019] The utility model has a reasonable structure, and the elution component includes a first pool body and a second pool body which are arranged in a sleeve manner. The design is ingenious. On the one hand, the first pool body is flexibly configured, and products in the existing technology can be selected to avoid non-standard customization, which is conducive to reducing costs and has good flexibility of use. On the other hand, the second pool body is designed to be compatible with the outer edge of the clamping component that clamps the filter membrane. In this way, in a single elution process, a small amount of eluent can be used to ensure a sufficient liquid level depth, so that the filter membrane can be better immersed in the eluent, which is conducive to improving the elution effect. Compared with the prior art in which elution is directly performed in the first pool body and a larger volume of lower concentration extract is obtained, the amount of eluent consumed in a single elution in this application is small, and the concentration of water-soluble components in the obtained extract is high, which is conducive to improving the subsequent detection accuracy. On the other hand, the same filter membrane in this application can not only extract soluble components to a large extent after multiple elutions, but also completes the filter membrane cleaning operation at the same time, avoiding the generation of waste liquid and further improving the detection accuracy. In addition, the small amount of eluent used is also conducive to reducing costs, while also reducing the cost of waste liquid treatment, greatly reducing the cost of use.

[0020] In the present application, the enrichment component allows the gas flowing through the gas cutter to pass through the filter membrane, so that the water-soluble components in the gas are enriched on the filter membrane. The hose connecting the gas cutter and the upper pressing cover is designed so that when the gas enters the closed chamber inside the upper and lower pressing covers, the hose is in a straightened state. This can greatly reduce the soluble components in the gas remaining in the hose, which is conducive to further improving the detection accuracy. In addition, the gas flowing through the filter membrane is discharged to the outside through an exhaust pipe. The exhaust pipe is equipped with a drying filter, a flow meter, a pressure-stabilizing filter and a vacuum pump. This can dry the gas to avoid damaging subsequent components on the one hand, and stabilize the airflow on the other hand, avoiding the enrichment of soluble components on the filter membrane due to unstable airflow during the assembly of the enrichment component, which is conducive to improving the detection accuracy.

[0021] The clamping assembly for holding the filter membrane in this application includes an upper cover and a lower cover. The upper and lower covers cooperate to better secure and flatten the filter membrane, improving the uniformity of soluble substance accumulation on the filter membrane and thereby facilitating adequate elution. Furthermore, the upper and lower covers screw together for easy operation. Furthermore, during the enrichment process, the filter membrane is positioned close to the upper compression cover, while during the elution process, the filter membrane is positioned close to the inner bottom surface of the second cell body. This facilitates the accumulation of soluble substances on the filter membrane while ensuring adequate elution, resulting in a rationally designed structure.

[0022] In the utility model, the enrichment component, elution component and turntable are accommodated in a chamber of the box body, and a dust-proof cloth is provided at the notch in the side wall of the chamber. This not only separates the elution component and the enrichment component from other components of the capture and extraction device, but also separates them from the external environment, preventing the filter membrane from being contaminated or affected while waiting for elution or enrichment, which is beneficial to improving the stability of the detection results.

[0023] The utility model is also provided with a first optical coupler, a first position sensor and a second position sensor, wherein the first optical coupler can identify the first baffle to reset the turntable to the initial position after the work is completed, and the first position sensor and the second position sensor can send signals to the external controller in time when the rotation angle of the turntable deviates, which is conducive to stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only one embodiment of the present invention. For those skilled in the art, other implementation drawings can be derived from the provided drawings without inventive effort.

[0025] Figure 1 : Schematic diagram of the three-dimensional structure of the utility model after removing some side panels of the middle box body Figure 1 ;

[0026] Figure 2 : The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0027] Figure 3 : Figure 1 A schematic diagram of the cross-sectional structure of the side view;

[0028] Figure 4 : Schematic diagram of the three-dimensional structure of the elution component of the utility model;

[0029] Figure 5 : Schematic diagram of the three-dimensional structure of the clamping assembly of the utility model clamping the filter membrane;

[0030] Figure 6: Schematic diagram of the three-dimensional structure of the enrichment component of the utility model; DETAILED DESCRIPTION

[0031] The following description and accompanying drawings sufficiently illustrate the specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for portions and features of other embodiments. The scope of the embodiments herein includes the entire scope of the claims, including all available equivalents thereof. Herein, the terms "first," "second," and the like are used solely to distinguish one element from another and do not require or imply any actual relationship or order between these elements. In practice, the first element can also be referred to as the second element, and vice versa. Furthermore, the terms "comprise," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a structure, device, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such structure, device, or apparatus. Without further limitation, an element defined by the phrase "comprising a..." does not preclude the presence of other identical elements in the structure, device, or apparatus comprising the element. The various embodiments herein are described in a progressive manner, with each embodiment focusing on its differences from the other embodiments. Similar or identical parts between the various embodiments can be referenced to each other.

[0032] The terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like in this document indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this document and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In the description of this document, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, they can be mechanical or electrical connections, or they can be internal connections between two elements. They can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] As used herein, unless otherwise specified, the term "plurality" means two or more.

[0034] In this document, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0035] In this article, the term "and / or" is used to describe the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0036] like Figures 1 to 6 The device for capturing and extracting water-soluble components in gas shown in the figure comprises a box body 1, a movable seat 2, an elution component 11 and a first driving unit;

[0037] The movable seat 2 is provided with an enrichment component 5, a turntable 6 and a second driving unit. Figure 1 As shown, the turntable 6 includes six radially extending and circumferentially arranged support plates, and the second driving unit includes a second stepping motor, which is fixed on the movable seat 2 and can transmit the rotational motion to the turntable 6 through the rotor.

[0038] like Figure 2 As shown, it also includes a first baffle, a first optical coupler, a first position sensor 19 and a second position sensor 20. The first baffle is fixed on the rotor and rotates synchronously with the turntable 6. The first optical coupler is fixed on the movable seat 2 and is used to identify the first baffle and can send a signal to the external controller to reset the turntable 6 to its initial position after work.

[0039] The first position sensor 19 and the second position sensor 20 are fixedly arranged and designed so that when the turntable 6 is working normally, the first position sensor 19 and the second position sensor 20 can be separately arranged on both sides of the support plate in the width direction and close to both sides of the support plate; when there is an error in the rotation angle of the turntable 6, the first position sensor 19 or the second position sensor 20 identifies the support plate and sends a signal to the external controller, thereby sending a prompt message to the staff.

[0040] like Figure 1 and 2 As shown, a filter membrane 8 is provided at the end of the support plate. In this embodiment, filter membrane 8 is a stainless steel fiber sintered felt with a pore size of 2 μm. It can intercept water-soluble components of gas with a particle size larger than the pore size and can be recycled after cleaning. Filter membrane 8 is prior art and will not be described in detail here. In other embodiments of the present invention, filter membrane 8 can be a metal fiber sintered felt made of other materials, with a pore size of less than 2.5 μm.

[0041] like Figure 1 and 5 As shown, the filter membrane 8 is clamped by the clamping assembly 9, which includes a lower cover 902 and an upper cover 901. The lower cover 902 is fixed to the support plate laterally, and the upper cover 901 is sleeved in the lower cover 902, and the upper cover 901 and the lower cover 902 are screwed together. Figure 5As shown, a center ring is provided inside the upper cover 901, and the center ring is fixedly connected to the inner wall surface of the lower cover 902 through a number of circumferentially arranged ribs. Screwing the upper cover 901 can press the filter membrane 8 against the annular flange of the inner wall surface of the lower cover 902. At this time, the center ring and the number of ribs are in contact with the filter membrane 8, so that the filter membrane 8 can be flattened, which is beneficial to improving the enrichment effect. At the same time, the structural design of the upper cover 901 can facilitate the staff to hold the center ring and the ribs to unscrew the upper cover 901 from the lower cover 902.

[0042] The enrichment component 5 can enrich the water-soluble components in the gas on the filter membrane 5; Figure 6 As shown, the enrichment assembly 5 includes an upper compression cover 501, a lower compression cover 502 and a third driving unit. The upper compression cover 501 is conical, and an upper sealing ring is provided on the bottom end surface of the upper compression cover 501. The top of the upper compression cover 501 is connected to a gas cutter 200 through a hose 12. The gas cutter 200 is a prior art and will not be described in detail here.

[0043] Among them, the hose 12 is designed to be tough, and when the movable seat 2 is displaced to the lower limit position under the action of the first driving unit and the filter membrane 8 is immersed in the eluent, the hose 12 is straightened, so that the airflow can enter the upper pressing cover 501 vertically, greatly reducing the residual soluble components on the inner wall of the hose 12, which is conducive to improving the detection accuracy.

[0044] The lower pressing cover 502 is in an inverted cone shape. A sealing ring is provided on the top surface of the lower pressing cover 501 . The bottom of the lower pressing cover 502 is connected to the outside through the exhaust pipe 13 .

[0045] The third driving unit can drive the upper pressing cover 501 and the lower pressing cover 502 to move closer or farther away. Specifically, the third driving unit includes a third motor. A driving wheel is fixedly provided at the rotor end of the third motor. The driving wheel is respectively engaged with two racks arranged opposite to each other. The two racks are respectively connected to the upper pressing cover 501 and the lower pressing cover 502 through connecting arms. When the driving wheel rotates forward, the upper pressing cover 501 and the lower pressing cover 502 are close to each other. The upper pressing cover 501 and the lower pressing cover 502 can clamp the clamping assembly 9 up and down and form a closed chamber, so that the water-soluble components in the gas entering the closed chamber through the gas cutter 200 are enriched on the filter membrane 8.

[0046] At this time, the filter membrane 8 is arranged close to the upper pressing cover, which is convenient for the enrichment of water-soluble substances thereon. Similarly, the filter membrane 8 located in the second cell body 111 is arranged close to the inner bottom surface of the second cell body 111, so that the elution is more sufficient; when the driving wheel rotates in the opposite direction, the upper pressing cover 501 and the lower pressing cover 502 move away from each other to release the clamping assembly 9 and the filter membrane 8.

[0047] like Figure 1 and 3As shown, a drying filter 14, a flow meter 15, a pressure-stabilizing filter 16 and a vacuum pump 17 are sequentially provided on the exhaust pipe 13 along the direction of the airflow, wherein the drying filter 14 and the pressure-stabilizing filter 16 are both vacuum filters, which are prior art and will not be described in detail here. The gas diffuses along a set path under the action of the vacuum pump 17. The drying filter 14 is used to dry the gas flowing through to avoid introducing water vapor into other components. The flow meter 15 is used to monitor the size of the airflow and is electrically connected to an external controller. The setting of the two filters can make the airflow more stable when the vacuum pump 17 is frequently started and stopped, which is beneficial to the enrichment of soluble substances on the filter membrane 8, thereby improving the detection accuracy.

[0048] like Figure 1 and 2 As shown, in this embodiment, the box body 1 is covered outside the movable seat 2, the elution component 11, the enrichment component 5 and the turntable 6, and the side wall of the box body 1 facing the turntable 6 is provided with an opening, as shown in FIG. Figure 1 As shown, a door panel 101 is hinged at the opening, and the door panel 101 can close or open the chamber 102 where the enrichment component 5, the elution component 11 and the turntable 6 are located. The chamber separates the enrichment component 5, the elution component 11 and the turntable 6 from other components, and a gap 1021 is provided on the side wall of the chamber 102 for the movable seat 2 to move up and down. The outer cover of the movable seat 2 is provided with a dustproof cloth 18, and the outer edge of the dustproof cloth 18 is connected to the edge of the gap 1021 to cover the gap 1021. In this way, the movable seat 2 and the enrichment component 5 and turntable 6, elution component 11, the first drive unit, the second drive unit and the third drive unit thereon can be separated from other components, reducing the influence of external pollution on the enrichment and elution process, which is conducive to improving the detection accuracy.

[0049] The first driving unit includes a first motor, which is fixed in the box body 1 and drives the movable seat 2 to move up and down through a screw pair.

[0050] like Figure 4As shown, the elution component 11 includes a first tank body 110, a second tank body 111 and an ultrasonic generator. The first tank body 110 is mounted outside the second tank body 111. The ultrasonic wave emitted by the ultrasonic generator can be transmitted to the eluent in the second tank body 111 through the liquid in the first tank body 110. In this embodiment, the ultrasonic generator has a power of 35W and an ultrasonic frequency of 40KHz. The arrangement of the first tank body 110 and the second tank body 111 in this application makes the caliber and size of the first tank body 110 more flexible, and can be adapted to the ultrasonic tank body in the existing technology, avoiding non-standard customization, which is conducive to reducing costs and having good flexibility of use. Among them, the first tank body 110 is respectively connected to a first water inlet and a first water outlet. The first water inlet is connected to the water source through a peristaltic pump, and a first drain valve is provided at the first water outlet. The liquid in the first tank body 110 can be replaced regularly, or the liquid in the first tank body 110 can be drained in time when the equipment is out of use.

[0051] The inner wall of the second cell body 111 mates with the outer edge of the clamping assembly 9 that holds the filter membrane 8. In this embodiment, the inner wall of the second cell body 111 and the outer wall of the clamping assembly 9 are spaced 0.5 to 5 mm apart. This allows for a sufficient liquid level to be maintained with a relatively small amount of eluent. Furthermore, the support plates on the turntable 6 facilitate immersion of the filter membrane 8 in the eluent, improving the elution efficiency and ensuring a sufficient concentration of soluble components in the extract. The second cell body 11 is connected to a second water inlet and a second water outlet. The second water inlet is connected to the eluent source via a metering pump, and the second water outlet is connected to an extract collection line, the end of which is connected to a collection bottle (not shown).

[0052] In addition, the liquid level in the first tank body 110 is not lower than the liquid level in the second tank body 111. In this embodiment, the liquid level in the first tank body 110 is 1 to 3 mm higher than the liquid level in the second tank body 111. This ensures good ultrasonic transmission effect and thus ensures elution effect.

[0053] In view of the good elution effect of the filter membrane in this application, multiple elutions can not only fully extract the soluble substances enriched on the filter membrane 8, but also clean the filter membrane 8, so that the filter membrane 8 after multiple elutions can meet the cleanliness requirements and avoid the generation of waste liquid. It should be emphasized that the extract finally obtained after multiple elutions in this application also has a suitable concentration of soluble components, which is convenient for measurement.

[0054] In other embodiments of the present invention, the box body 1 is further covered with a shell, and one or more of an air conditioner, a sterilizer, and a temperature sensor are installed in the shell to create a good working environment and ensure smooth operation of the device.

[0055] Using the above capture and extraction device, the method for capturing and extracting water-soluble components in gas includes the following steps:

[0056] A. The second driving unit drives the turntable 6 to rotate, causing a clean filter membrane 8 to rotate to the enrichment component 5; at the same time, a collected filter membrane 8 rotates to the top of the second cell body 111;

[0057] B. The first driving unit drives the movable seat 2 to move downward from the upper limit position to the lower limit position, so that the collected filter membrane 8 extends below the liquid level of the eluent in the second cell body 111. At this time, the hose 12 is stretched to a vertical state, and the ultrasonic generator is activated to elute the filter membrane 8 immersed in the second cell body 111; at the same time, the third driving unit in the enrichment component 5 is activated, driving the upper pressing cover 501 and the lower pressing cover 502 to move closer to each other and clamp the clamping component 9 downward, and then starting the vacuum pump 17 to allow gas to flow through the filter membrane 8 so that the soluble components are enriched on the filter membrane 8. At the same time, under the action of the drying filter 14 and the pressure-stabilizing filter 16, the flow rate of the gas flowing through can be guaranteed to be stable;

[0058] C. The ultrasonic wave emitted by the ultrasonic generator can be transmitted to the eluent in the second cell body 111 through the liquid in the first cell body 110, wherein the liquid in the first cell body 110 can be ultrapure water, and the eluent is ultrapure water. The water-soluble substances on the filter membrane 8 are eluted within the set time a1, and then the extract in the second cell body 111 is discharged and collected in a collection bottle, and then 10 ml of the set amount of eluent is injected into the second cell body 111; the elution is repeated three times to obtain three extracts; at this time, the filter membrane is relatively clean and can be directly used for the next enrichment.

[0059] D. Then, the first driving unit drives the movable seat 2 to move upward from the lower limit position to the upper limit position. At this time, the hose 12 is bent, and the washed filter membrane 8 is placed above the second cell body 111;

[0060] E. Afterwards, the second driving unit drives the turntable 6 to rotate, so that the eluted filter membrane 8 is away from the second cell body 111, and then the second cell body 111 is injected with a set amount of eluent, and the adjacent other collected filter membrane 8 is rotated to the top of the second cell body 111.

[0061] This cycle is repeated to achieve online capture and extraction of gas soluble components.

[0062] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments. Any changes or modifications based on the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An online capture and extraction device for water-soluble components in gas, characterized in that: The invention comprises a box body (1), wherein a movable seat (2), an elution assembly (11) and a first drive unit are provided in the box body (1), an enrichment assembly (5), a turntable (6) and a second drive unit are provided on the movable seat (2), the turntable (6) comprises a plurality of radially extending and circumferentially arranged support plates, the ends of the support plates are provided with filter membranes (8) via clamping assemblies (9), and the second drive unit can drive the turntable (6) to rotate; the enrichment assembly (5) can allow the gas flowing through the gas cutter to pass through the filter membrane (8), so that the water-soluble components in the gas are enriched on the filter membrane (8); The elution assembly (11) includes a first cell body (110), a second cell body (111) and an ultrasonic generator, wherein the first cell body (110) is sleeved outside the second cell body (111), and the ultrasonic wave emitted by the ultrasonic generator can be transmitted through the liquid in the first cell body (110) to the eluent in the second cell body (111); The enrichment component (5) and the elution component (11) are respectively arranged at the upper and lower ends of the turntable (6). When the turntable (6) rotates to place an enriched filter membrane (8) above the second cell body (111), the first driving unit can drive the movable seat (2) to move, so that the filter membrane (8) extends into the second cell body (111) for elution to obtain the extract. At the same time, a clean filter membrane (8) is enriched with water-soluble components in the gas under the action of the enrichment component (5).

2. The online capture and extraction device for water-soluble components in gas according to claim 1, characterized in that: The inner wall surface of the second cell body (111) is adapted to the outer edge of the clamping assembly (9) for clamping the filter membrane (8), so that a small amount of eluent forms a sufficiently high liquid level, and the liquid level in the first cell body (110) is not lower than the liquid level in the second cell body (111).

3. The online capture and extraction device for water-soluble components according to claim 1, characterized in that: The enrichment component includes an upper pressing cover (501), a lower pressing cover (502) and a third driving unit. The upper pressing cover (501) is connected to the gas cutter (200) through a hose (12), and the lower pressing cover (502) is connected to the outside through an exhaust pipe (13). The third driving unit can drive the upper pressing cover (501) and the lower pressing cover (502) to move closer or farther away. When the upper pressing cover (501) and the lower pressing cover (502) are close to each other, the upper pressing cover (501) and the lower pressing cover (502) can clamp the filter membrane (8) up and down and form a closed chamber, so that the water-soluble components in the gas entering the closed chamber through the air cutter (200) are enriched on the filter membrane (8).

4. The online capture and extraction device for water-soluble components in gas according to claim 3, characterized in that: The hose (12) is designed to be tough, and when the movable seat (2) is displaced to the lower limit position under the action of the first driving unit and the filter membrane (8) is immersed in the eluent in the second tank body (111), the hose (12) is straightened.

5. The online capture and extraction device for water-soluble components in gas according to claim 4, characterized in that: The exhaust pipe (13) is provided with a drying filter (14), a flow meter (15), a pressure-stabilizing filter (16) and a vacuum pump (17) in sequence along the direction of the air flow. The gas diffuses along a set path under the action of the vacuum pump (17). The drying filter (14) is used to dry the gas flowing through it. The flow meter (15) is used to monitor the size of the air flow and is electrically connected to an external controller.

6. The on-line capture and extraction device for water-soluble components in gas according to any one of claims 1 to 5, characterized in that: The clamping assembly (9) comprises a lower cover (902) and an upper cover (901), wherein the lower cover (902) is laterally fixed to the support plate, and the upper cover (901) is sleeved inside the lower cover (902) and threadedly connected to the lower cover (902) to press the filter membrane (8) against the annular flange on the inner wall of the lower cover (902).

7. The online capture and extraction device for water-soluble components according to claim 6, characterized in that: The filter membrane (8) comprises stainless steel metal fiber sintered felt, and the filter pore size of the filter membrane (8) is not greater than 2.5 μm.

8. The online capture and extraction device for water-soluble components according to claim 6, characterized in that: An opening is provided on the side wall of the box body (1) facing the turntable (6), and a door panel (101) is hingedly connected to the opening. A vertical panel is provided inside the box body (1), and a notch (1021) is provided on the vertical panel for the movable seat (2) to pass through. The vertical panel, the door panel (101) and the box body (1) together enclose an independent chamber (102) for accommodating the enrichment component (5), the turntable (6) and the elution component (11), so as to be relatively separated from other components.

9. The online capture and extraction device for water-soluble components according to claim 7, characterized in that: The portion of the movable seat (2) extending outside the independent chamber (102) is covered with a dustproof cloth (18), and the dustproof cloth (18) covers the gap (1021).

10. The online capture and extraction device for water-soluble components according to any one of claims 7 to 9, characterized in that: The invention also includes a first baffle, a first optical coupler, a first position sensor (19) and a second position sensor (20), wherein the first baffle rotates synchronously with the turntable (6), the first optical coupler is fixed on the movable seat (2) for identifying the first baffle and sending a signal to an external controller, the first position sensor (19) and the second position sensor (20) are fixedly arranged and designed so that when the turntable (6) works normally, the first position sensor (19) and the second position sensor (20) can be arranged on both sides of the width direction of the support plate and close to both sides of the support plate; when an error occurs in the rotation angle of the turntable (6), the first position sensor (19) or the second position sensor (20) identifies the support plate and sends a signal to the external controller.

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