A volatile gas purging and trapping device

Abstract

The utility model discloses a volatile gas purging trapping device relates to gas phase extraction technical field, including low temperature medium box, the left side fixed connection of low temperature medium box has purging bottle, the left side fixed connection of low temperature medium box top has the trapping bottle, the inside of purging bottle is provided with the even gas -dispersing gas -dispersing subassembly. This volatile gas purging trapping device is provided with holding bar, bowl -shaped bottom shell, extension pipe, sealing washer and air outlet hole, when using, with inert gas from purging inlet pipe injection purging bottle, extension pipe extends into purging inlet pipe, and sealing washer increases the edge tightness, and the gas is introduced into bowl -shaped bottom shell by extension pipe, and is discharged from the air outlet hole of dense distribution, forms multiple fine bubbles, can increase and the contact area of sample solution, promotes purging efficiency, realizes the function of gas -dispersing purging efficiency promotion, solves the problem that the device does not have the function of gas -dispersing purging efficiency promotion.

Description

Technical Field

[0001] This utility model relates to the field of gas phase extraction technology, specifically to a volatile gas purging and collection device. Background Technology

[0002] The purge-and-trap method belongs to the category of gas phase extraction. It uses nitrogen, helium or other inert gases to extract the analyte from the sample, allowing the gas to continuously pass through the sample. The volatile components are extracted and then trapped in an adsorbent or cold trap for analysis. Therefore, it is a non-equilibrium continuous extraction.

[0003] Currently, most volatile gas purging and trapping devices are similar in overall structure, consisting of two main containers: a purge bottle and a trapping bottle. The sample solution is injected into the purge bottle, and gas is continuously blown out from the bottom of the purge bottle. The gas passes through the sample solution, extracting the analyte, and then enters the trapping bottle through a pipeline, where it is captured by the absorbent. However, in actual use, there are some functional shortcomings and room for improvement. For example, during the purging process, most current trapping bottles have only one vent at the bottom, resulting in fewer bubbles and limited gas-liquid contact area with the sample solution. There is no room for further expansion, and the device does not have the function of dispersing gas to improve purging efficiency.

[0004] Now, a novel volatile gas purging and collection device is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a volatile gas purging and collection device to solve the problem mentioned in the background art of not having the function of dispersing gas to improve purging efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a volatile gas purging and collection device, comprising a cryogenic medium tank, a purging bottle fixedly connected to the left side of the cryogenic medium tank, a first sealing cap fixedly connected to the top of the purging bottle, a raw liquid inlet pipe inserted into the left side of the top of the first sealing cap, an outlet pipe inserted into the right side of the top of the first sealing cap, a purging gas inlet pipe fixedly connected to the bottom of the purging bottle, a collection bottle fixedly connected to the left side of the top of the cryogenic medium tank, a second sealing cap fixedly connected to the top of the collection bottle, an inlet pipe inserted into the left side of the top of the second sealing cap, an exhaust pipe inserted into the right side of the top of the second sealing cap, a PLC controller fixedly connected to the front end of the cryogenic medium tank, and a gas dispersion component for uniform gas dispersion provided inside the purging bottle.

[0007] The gas dispersing assembly includes a bowl-shaped bottom shell, which is placed horizontally at the bottom of the purge bottle. A gripping rod is vertically fixedly connected to the middle position of the top of the bowl-shaped bottom shell. An extension tube is fixedly connected to the middle position of the bottom of the bowl-shaped bottom shell. Three sets of sealing rings are sleeved on the outside of the extension tube. Multiple sets of gas outlet holes are opened at the top of the bowl-shaped bottom shell.

[0008] As a further technical solution of this utility model, the vertical center lines of the gripping rod and the bowl-shaped bottom shell coincide, and the top end of the gripping rod and the bottom end of the first sealing cover are in contact.

[0009] As a further technical solution of this utility model, the extension tube extends into the interior of the purge inlet pipe, and the outer diameter of the sealing ring is adapted to the inner diameter of the purge inlet pipe.

[0010] As a further technical solution of this utility model, the bowl-shaped bottom shell and the extension tube are connected internally, the air outlets are arranged at equal intervals, and the outlet tube and the inlet tube are connected.

[0011] As a further technical solution of this utility model, an infrared temperature sensor is fixedly connected to the middle position of the top of the second sealing cover, and a sensor wiring is movably connected between the infrared temperature sensor and the PLC controller.

[0012] As a further technical solution of this utility model, the bottom end of the infrared temperature sensor penetrates through the second sealing cap and extends into the interior of the collection bottle, and the infrared temperature sensor and the PLC controller are electrically connected.

[0013] As a further technical solution of this utility model, a copper coil is fixedly connected to the right side inside the low-temperature medium tank. A refrigerant inlet is provided at the top right side of the copper coil, and a refrigerant outlet is provided at the bottom right side of the copper coil. An electric heating tube is installed at the bottom inside the low-temperature medium tank, and a connecting wire is provided between the PLC controller and the electric heating tube.

[0014] As a further technical solution of this utility model, the copper coil, refrigerant inlet, and refrigerant outlet are internally connected, and the PLC controller and electric heating tube are electrically connected.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the volatile gas purging and collection device not only realizes the function of dispersing gas to improve purging efficiency, but also realizes the function of absorbent temperature monitoring and collection temperature control. The device is equipped with a gripping rod, a bowl-shaped bottom shell, an extension tube, a sealing ring, and vent holes. During use, the sample solution is injected into the purge bottle from the original liquid inlet tube, and inert gas is injected into the purge bottle from the purge inlet tube, purging the sample solution from bottom to top. The inert gas carries the analyte into the collection bottle, where it comes into contact with the adsorbent and is adsorbed and captured. As the inert gas is injected into the purge bottle from the purge inlet tube, the extension tube extends into the purge inlet tube, and the sealing ring increases the edge sealing. The gas is then guided into the bowl-shaped bottom shell by the extension tube and discharged from the densely distributed vent holes, forming multiple fine bubbles. This increases the contact area with the sample solution, improves the purge efficiency, and achieves the function of dispersing gas to improve purge efficiency. By setting up an infrared temperature sensor and sensor wiring, the infrared temperature sensor keeps monitoring the temperature of the adsorbent below during use, avoiding the influence of temperature factors on adsorption efficiency, and feeding the temperature value back to the PLC controller for easy viewing by the staff, thus realizing the function of adsorbent temperature monitoring. Equipped with a copper coil, refrigerant inlet, refrigerant outlet, electric heating element, and connecting wires, the system uses a low-temperature medium tank to hold the collection bottle in a low-temperature state, forming a cold trap. When further cooling is needed, the refrigerant is pumped in through the compressor along the refrigerant inlet. The refrigerant then passes through the copper coil to further cool the contents of the low-temperature medium tank. When heating is needed, the electric heating element is activated to raise the temperature, thus achieving the function of controlling the collection temperature. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a front view cross-sectional structural diagram of the purge bottle of this utility model; Figure 3 This is an enlarged structural schematic diagram of the front cross-section of the bowl-shaped bottom shell of this utility model; Figure 4 This is a front view cross-sectional structural diagram of the trapping bottle of this utility model; Figure 5 This is a front view cross-sectional structural diagram of the cryogenic medium tank of this utility model.

[0017] In the diagram: 1. Low-temperature medium tank; 2. Purge bottle; 3. First sealing cap; 4. Raw material feed pipe; 5. Purge air inlet pipe; 6. Holding rod; 7. Bowl-shaped bottom shell; 8. Extension pipe; 9. Sealing ring; 10. Vent; 11. Outlet pipe; 12. Collection bottle; 13. Second sealing cap; 14. Inlet pipe; 15. Exhaust pipe; 16. Infrared temperature sensor; 17. Sensor wiring; 18. PLC controller; 19. Copper coil; 20. Refrigerant inlet; 21. Refrigerant outlet; 22. Heating element; 23. Connecting wire. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example: Please refer to Figure 1-5 A volatile gas purging and collection device includes a low-temperature medium tank 1, a purging bottle 2 fixedly connected to the left side of the low-temperature medium tank 1, a first sealing cap 3 fixedly connected to the top of the purging bottle 2, a raw liquid inlet pipe 4 inserted into the left side of the top of the first sealing cap 3, an outlet pipe 11 inserted into the right side of the top of the first sealing cap 3, a purging air inlet pipe 5 fixedly connected to the bottom of the purging bottle 2, a collection bottle 12 fixedly connected to the left side of the top of the low-temperature medium tank 1, a second sealing cap 13 fixedly connected to the top of the collection bottle 12, an inlet pipe 14 inserted into the left side of the top of the second sealing cap 13, an exhaust pipe 15 inserted into the right side of the top of the second sealing cap 13, a PLC controller 18 fixedly connected to the front end of the low-temperature medium tank 1, and a gas dispersion component for uniform gas dispersion provided inside the purging bottle 2. Please see Figure 1-5 A volatile gas purging and collection device also includes a gas dispersion component, which includes a bowl-shaped bottom shell 7. The bowl-shaped bottom shell 7 is placed horizontally at the bottom of the purge bottle 2. A gripping rod 6 is vertically fixedly connected at the middle position of the top of the bowl-shaped bottom shell 7. An extension tube 8 is fixedly connected at the middle position of the bottom of the bowl-shaped bottom shell 7. Three sets of sealing rings 9 are sleeved on the outside of the extension tube 8. Multiple sets of vent holes 10 are opened at the top of the bowl-shaped bottom shell 7. The vertical center lines of the gripping rod 6 and the bowl-shaped bottom shell 7 coincide. The top of the gripping rod 6 and the bottom of the first sealing cover 3 are in contact. The extension tube 8 extends into the interior of the purge air inlet tube 5. The outer diameter of the sealing ring 9 is matched with the inner diameter of the purge air inlet tube 5. The interiors of the bowl-shaped bottom shell 7 and the extension tube 8 are connected. The air outlets 10 are arranged at equal intervals. The outlet tube 11 and the inlet tube 14 are connected. The purge efficiency can be improved by dispersing the gas. Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, as inert gas is injected into the purge bottle 2 from the purge inlet pipe 5, the extension pipe 8 extends into the purge inlet pipe 5, and the sealing ring 9 increases the edge sealing. The gas is then guided into the bowl-shaped bottom shell 7 by the extension pipe 8 and discharged from the densely distributed vent holes 10, forming multiple fine bubbles, which can increase the contact surface with the sample solution and improve the purge efficiency.

[0020] An infrared temperature sensor 16 is fixedly connected to the middle position of the top of the second sealing cover 13. A sensor wiring 17 is movably connected between the infrared temperature sensor 16 and the PLC controller 18. The bottom end of the infrared temperature sensor 16 passes through the second sealing cover 13 and extends into the interior of the collection bottle 12. The infrared temperature sensor 16 and the PLC controller 18 are electrically connected and can monitor the temperature of the adsorbent. Specifically, such as Figure 1 , Figure 4 and Figure 5 As shown, the infrared temperature sensor 16 continuously monitors the temperature of the adsorbent below to prevent temperature factors from affecting the adsorption efficiency, and feeds the temperature value back to the PLC controller 18 for easy viewing by staff.

[0021] A copper coil 19 is fixedly connected to the right side of the interior of the low-temperature medium tank 1. A refrigerant inlet 20 is provided at the top right side of the copper coil 19, and a refrigerant outlet 21 is provided at the bottom right side of the copper coil 19. An electric heating tube 22 is installed at the bottom inside the interior of the low-temperature medium tank 1. A connecting wire 23 is provided between the PLC controller 18 and the electric heating tube 22. The copper coil 19, the refrigerant inlet 20, and the refrigerant outlet 21 are internally connected. The PLC controller 18 and the electric heating tube 22 are electrically connected to facilitate the control of the adsorbent temperature. Specifically, such as Figure 1 , Figure 4 and Figure 5 As shown, the low-temperature medium tank 1 contains the low-temperature medium, which keeps the collection bottle 12 at a low temperature to form a cold trap. When further cooling is needed, the refrigerant is pumped in through the compressor along the refrigerant inlet 20. The refrigerant passes through the copper coil 19 to further cool the low-temperature medium tank 1. When heating is needed, the electric heating tube 22 is activated to heat the medium.

[0022] Working Principle: In use, the sample solution is first injected into the purge bottle 2 through the raw material inlet pipe 4. Inert gas is injected into the purge bottle 2 through the purge inlet pipe 5, purging the sample solution from bottom to top. The inert gas carries the analyte into the collection bottle 12, where it comes into contact with the adsorbent and is adsorbed and captured. As the inert gas is injected into the purge bottle 2 through the purge inlet pipe 5, the extension pipe 8 extends into the purge inlet pipe 5. The sealing ring 9 increases the edge sealing, and the gas is then guided into the bowl-shaped bottom shell 7 through the extension pipe 8 and discharged from the densely distributed vent holes 10, forming multiple fine bubbles. This increases the contact area with the sample solution and improves the purge efficiency. The infrared temperature sensor 16 monitors the temperature of the adsorbent below to prevent temperature factors from affecting the adsorption efficiency and feeds the temperature value back to the PLC controller 18 for easy viewing by the operator. The low-temperature medium tank 1 contains the low-temperature medium, which keeps the collection bottle 12 at a low temperature to form a cold trap. When further cooling is needed, the refrigerant is pumped in through the compressor along the refrigerant inlet 20. The refrigerant passes through the copper coil 19 to further cool the low-temperature medium tank 1. When heating is needed, the electric heating tube 22 is activated to heat the medium.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A volatile gas purging and collection device, comprising a cryogenic medium tank (1), characterized in that: A purge bottle (2) is fixedly connected to the left side of the cryogenic medium tank (1). A first sealing cap (3) is fixedly connected to the top of the purge bottle (2). A raw liquid feed pipe (4) is inserted into the left side of the top of the first sealing cap (3). An outlet pipe (11) is inserted into the right side of the top of the first sealing cap (3). A purge air inlet pipe (5) is fixedly connected to the bottom of the purge bottle (2). A collection bottle (12) is fixedly connected to the left side of the top of the cryogenic medium tank (1). A second sealing cap (13) is fixedly connected to the top of the collection bottle (12). An inlet pipe (14) is inserted into the left side of the top of the second sealing cap (13). An exhaust pipe (15) is inserted into the right side of the top of the second sealing cap (13). A PLC controller (18) is fixedly connected to the front end of the cryogenic medium tank (1). A gas dispersion component for uniform gas dispersion is provided inside the purge bottle (2). The gas dispersing assembly includes a bowl-shaped bottom shell (7), which is placed horizontally at the bottom of the purge bottle (2). A gripping rod (6) is vertically fixed at the middle position of the top of the bowl-shaped bottom shell (7). An extension tube (8) is fixedly connected at the middle position of the bottom of the bowl-shaped bottom shell (7). Three sets of sealing rings (9) are sleeved on the outside of the extension tube (8). Multiple sets of air outlets (10) are opened at the top of the bowl-shaped bottom shell (7).

2. The volatile gas purging and collection device according to claim 1, characterized in that: The vertical center lines of the gripping rod (6) and the bowl-shaped bottom shell (7) coincide, and the top of the gripping rod (6) and the bottom of the first sealing cover (3) are in contact.

3. The volatile gas purging and collection device according to claim 1, characterized in that: The extension tube (8) extends into the interior of the purge inlet pipe (5), and the outer diameter of the sealing ring (9) is matched with the inner diameter of the purge inlet pipe (5).

4. The volatile gas purging and collection device according to claim 1, characterized in that: The bowl-shaped bottom shell (7) and the extension tube (8) are connected internally, the air outlets (10) are arranged at equal intervals, and the outlet tube (11) and the inlet tube (14) are connected.

5. The volatile gas purging and collection device according to claim 1, characterized in that: An infrared temperature sensor (16) is fixedly connected at the middle position of the top of the second sealing cover (13), and a sensor wiring (17) is movably connected between the infrared temperature sensor (16) and the PLC controller (18).

6. The volatile gas purging and collection device according to claim 5, characterized in that: The bottom end of the infrared temperature sensor (16) passes through the second sealing cap (13) and extends into the interior of the collection bottle (12). The infrared temperature sensor (16) and the PLC controller (18) are electrically connected.

7. The volatile gas purging and collection device according to claim 1, characterized in that: A copper coil (19) is fixedly connected to the right side inside the low-temperature medium tank (1). A refrigerant inlet (20) is provided at the top right side of the copper coil (19), and a refrigerant outlet (21) is provided at the bottom right side of the copper coil (19). An electric heating tube (22) is installed at the bottom inside the low-temperature medium tank (1). A connecting wire (23) is provided between the PLC controller (18) and the electric heating tube (22).

8. The volatile gas purging and collection device according to claim 7, characterized in that: The copper coil (19), refrigerant inlet (20), and refrigerant outlet (21) are internally connected, and the PLC controller (18) and electric heating tube (22) are electrically connected.

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