Aerosol online trapping and sampling device

Abstract

The utility model relates to the technical field of aerosol sampling, in particular to an aerosol on-line trapping and sampling device, which is characterized in that a pipeline spirally surrounds the surface of a cylinder, so that the cylinder can be cooled by the pipeline, aerosol can be trapped at low temperature, and a heating plate is arranged on the surface of the cylinder, so that the sampling efficiency is improved. The heating plate is arranged in the cylinder, so that the heating plate can heat the cylinder after trapping aerosol, chemical components of the aerosol in the cylinder begin to be separated out under a high-temperature heating condition, and finally the chemical components are transmitted into an analysis instrument through the sample inlet to be analyzed and processed; the technical problems that an existing smoke online analysis and detection device lacks an aerosol concentration process and needs to be matched with a high-sensitivity analysis instrument, and the service life of a chromatographic column can be affected when chromatographic analysis is carried out due to the fact that smoke directly sucked and captured by a smoking machine contains oxygen, water and other components are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aerosol sampling, and particularly relates to a device for on-line trapping and sampling of aerosol. Background Technique

[0002] Analyzing the chemical components in aerosol is a particularly important hot research work in the tobacco industry. The common methods for trapping aerosol mainly include glass fiber filter, solvent trap and direct sampling, etc.

[0003] Before the chemical components in the aerosol are analyzed by an instrument, they need to be trapped after being sucked by a smoking machine, and then pretreated by means such as solvent extraction and concentration. The steps are rather cumbersome. For example, Patent CN200920257867.X "Automatic Trapping Device for Cigarette Puff by Puff" and Patent CN201520088950.4 "A Semi-automatic Cigarette Puff-by-Puff Flue Gas Collection Bag Collection Device" respectively use Cambridge filter and collection bag to trap the cigarette puff-by-puff flue gas.

[0004] Patent CN202010716253.4 discloses a device for on-line analysis and detection of heated cigarette flue gas. However, this device lacks the process of concentrating the aerosol, requires a highly sensitive analytical instrument to be adapted, and the flue gas directly trapped by sucking through a smoking machine contains components such as oxygen and moisture. When performing chromatographic analysis, components such as oxygen and moisture in the flue gas will affect the service life of the chromatographic column. Content of the Utility Model

[0005] The purpose of the utility model is to provide a device for on-line trapping and sampling of aerosol, aiming to realize the low-temperature trapping of aerosol and on-line analysis and treatment under high-temperature heating, and solve the technical problems that the existing on-line flue gas analysis and detection device lacks the process of concentrating the aerosol, requires a highly sensitive analytical instrument to be adapted, and the flue gas directly trapped by sucking through a smoking machine contains components such as oxygen and moisture, which will affect the service life of the chromatographic column during chromatographic analysis.

[0006] To achieve the above technical purpose, the technical scheme adopted by the utility model is as follows:

[0007] The utility model provides a device for on-line aerosol capture and sampling, which comprises a cylinder. The cylinder is separated into two parts from the right side, obtaining a first cylinder and a second cylinder. The second cylinder is detachably connected to the first cylinder. Gas flow paths are arranged at the upper, lower, left and right positions of the cylinder. The gas flow paths on the upper and lower sides communicate with each other, and the gas flow path on the upper side is connected to an analytical instrument through a sampling port. The gas flow path on the lower side is connected to a gas generator. The gas flow path on the left side is connected to a smoking device. The gas flow path on the right side is connected to a smoking machine. A pipeline spirally surrounds the surface of the cylinder, and the pipeline is used for cooling the cylinder. A heating plate is further arranged on the surface of the cylinder, which is used for heating the cylinder after the aerosol capture is completed.

[0008] Wherein, the first cylinder and the second cylinder are connected by threads.

[0009] Wherein, a high-temperature resistant sealing ring is arranged between the first cylinder and the second cylinder, which is used for sealing the gap between the first cylinder and the second cylinder.

[0010] Wherein, solenoid valves are separately arranged for the gas flow paths on the upper and lower sides and the left and right ends of the cylinder.

[0011] Wherein, the interior of the cylinder is a hollow structure, and a glass fiber sheet or other high-temperature resistant solid adsorption materials are placed inside the cylinder.

[0012] Wherein, the pipeline is purged with coolant or liquid nitrogen to realize the cooling of the cylinder.

[0013] For the device for on-line aerosol capture and sampling of the utility model, by spirally surrounding the pipeline on the surface of the cylinder, the pipeline can cool the cylinder, and then the aerosol can be captured at a low temperature. By arranging the heating plate on the surface of the cylinder, the heating plate can heat the cylinder after the aerosol capture, so that under the condition of high-temperature heating, the chemical components of the aerosol in the cylinder start to precipitate, and finally are transmitted into the analytical instrument through the sampling port for analysis and processing, solving the technical problems that the existing on-line flue gas analysis and detection device lacks the process of concentrating the aerosol, needs to be adapted to a highly sensitive analytical instrument, and the flue gas directly captured by suction of the smoking machine contains components such as oxygen and moisture, which will affect the service life of the chromatographic column during chromatographic analysis. Description of the Drawings

[0014] The utility model can be further illustrated by the non-limiting embodiments given in the drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the aerosol on-line trapping and sampling device according to the first embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the connection between the heating plate and the first cylinder of the aerosol on-line trapping and sampling device according to the first embodiment of the present invention.

[0017] Figure 3 It is a schematic cross-sectional view of the aerosol on-line trapping and sampling device according to the first embodiment of the present invention along the heating plate.

[0018] In the figure: 101 - the first cylinder, 102 - the second cylinder, 103 - the gas flow path, 104 - the smoking machine, 105 - the sampling port, 106 - the analytical instrument, 107 - the gas generator, 108 - the pipeline, 109 - the heating plate, 110 - the high-temperature resistant sealing ring, 111 - the solenoid valve, 112 - the smoking device. Specific embodiments

[0019] In order to enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.

[0020] The first embodiment

[0021] Please refer to Figures 1 to 3 , Figure 1 It is a schematic diagram of the overall structure of the aerosol on-line trapping and sampling device according to the first embodiment of the present invention, Figure 2 It is a schematic diagram of the connection between the heating plate 109 and the first cylinder 101 of the aerosol on-line trapping and sampling device according to the first embodiment of the present invention, Figure 3 It is a schematic cross-sectional view of the aerosol on-line trapping and sampling device according to the first embodiment of the present invention along the heating plate 109.

[0022] The present invention provides an aerosol on-line trapping and sampling device: including a cylinder, a gas flow path 103, a pipeline 108 and a heating plate 109, and the cylinder includes a first cylinder 101 and a second cylinder 102. Through the foregoing solution, the problem that the existing flue gas on-line analysis and detection device lacks the process of concentrating the aerosol, needs to be adapted to a high-sensitivity analytical instrument 106, and the flue gas directly sucked and trapped by the smoking machine 104 contains oxygen, moisture, etc., which will affect the service life of the chromatographic column during chromatographic analysis is solved. It can be understood that the foregoing solution can be used in the scenario of analyzing the chemical components in the aerosol.

[0023] In this embodiment, by spirally winding the pipeline around the surface of the cylinder, the pipeline can cool down the cylinder, and then the aerosol can be captured at a low temperature. By arranging the heating plate 109 on the surface of the cylinder, after the aerosol is captured, the heating plate 109 can heat the cylinder, so that under the condition of high-temperature heating, the chemical components of the aerosol in the cylinder start to precipitate and are finally transmitted into the analytical instrument 106 through the sample inlet 105 for analysis and processing, solving the technical problems that the existing on-line flue gas analysis and detection device lacks the process of concentrating the aerosol, needs to be adapted to a highly sensitive analytical instrument 106, and the flue gas directly sucked and captured by the smoking machine 104 contains components such as oxygen and moisture, which will affect the service life of the chromatographic column during chromatographic analysis.

[0024] Among them, the cylinder is separated into two parts from the right side to obtain a first cylinder 101 and a second cylinder 102. The second cylinder 102 is detachably connected to the first cylinder 101. Gas flow paths 103 are provided at the upper, lower, left, and right positions of the cylinder. The gas flow paths 103 on the upper and lower sides are communicated with each other, and the gas flow path 103 on the upper side is communicated with the analytical instrument 106 through the sample inlet 105. The gas flow path 103 on the lower side is communicated with the gas generator 107. The gas flow path 103 on the left side is communicated with the smoking device 112. The gas flow path 103 on the right side is communicated with the smoking machine 104. A pipeline 108 is spirally wound around the surface of the cylinder, and the pipeline 108 is used to cool down the cylinder. A heating plate 109 is also arranged on the surface of the cylinder, which is used to heat the cylinder after the aerosol is captured. The cylinder is a horizontally lying hollow inert stainless steel cylinder. The gas flow paths 103 at the left and right ends are the flow paths of the smoking machine 104, and the upper and lower ends are the carrier gas flow paths. The gas paths at the upper and lower ends are provided with three-way joints, so that the carrier gas flow path can be branched. The heating plate 109 is a PTC ceramic heating plate.

[0025] Secondly, the first cylinder 101 and the second cylinder 102 are connected by threads. The first cylinder 101 has internal threads, and the second cylinder 102 has external threads. The external threads of the second cylinder 102 can be tightened or loosened at the internal threads of the first cylinder 101 to realize the installation or disassembly of the second cylinder 102 in the first cylinder 101.

[0026] Thirdly, a high-temperature resistant sealing ring 110 is arranged between the first cylinder 101 and the second cylinder 102, which is used to seal the gap between the first cylinder 101 and the second cylinder 102.

[0027] Meanwhile, solenoid valves 111 are separately provided in the gas flow paths 103 on the upper and lower sides and the left and right ends of the cylinder. By opening or closing the solenoid valves 111, the solenoid valves 111 can open or close the channels of the gas flow paths 103.

[0028] In addition, the interior of the cylinder is a hollow structure, and a fiberglass sheet or other high-temperature resistant solid adsorption material is placed inside the cylinder.

[0029] Finally, the pipeline 108 is purged with coolant or liquid nitrogen to cool down the cylinder.

[0030] When using the present utility model, turn on the smoking machine 104. When the smoking machine 104 starts to work, close the solenoid valves 111 on the upper and lower sides, and let the pipeline 108 spirally surrounding the surface of the cylinder be purged with coolant or liquid nitrogen, so that the pipeline 108 can start to cool down the cylinder, realizing the capture of aerosol in the flue gas in a low-temperature environment. The time for the pipeline 108 to cool down the cylinder needs to last until the smoking machine 104 finishes working.

[0031] After the smoking machine 104 stops working, open the solenoid valve 111 on the upper side and close the solenoid valve 111 on the right end, so that the gas introduced by the gas generator 107 can purge and displace the residual flue gas in the cylinder. After the purging is completed, close the solenoid valve 111 on the left end and open the solenoid valve 111 on the lower side. At the same time, the gas flow path 103 is switched from the tee connection at the upper and lower ends to the outflow path, so that the gas introduced by the gas generator 107 does not pass through the cylinder. At this time, start the heating plate 109 to let the heating plate 109 heat the cylinder, so that the chemical components in the aerosol in the solid adsorption material in the cylinder start to precipitate. When the chemical components in the aerosol reach equilibrium, the gas flow path 103 is switched to pass through the cylinder again, so that the balanced aerosol can be brought into the analytical instrument 106 through the sample inlet 105, and let the analytical instrument 106 start to work formally to analyze and process the chemical components in the aerosol.

[0032] In summary, by spirally winding around the cylinder on the surface of the cylinder, the pipe can cool down the cylinder, and then the aerosol can be captured at a low temperature. By arranging the heating plate 109 on the surface of the cylinder, after the aerosol is captured, the heating plate 109 can heat the cylinder, so that under the condition of high-temperature heating, the chemical components of the aerosol in the cylinder begin to precipitate, and finally are transmitted to the analysis instrument 106 through the sample inlet 105 for analysis and processing, solving the technical problems that the existing on-line flue gas analysis and detection device lacks the process of concentrating the aerosol, needs to be adapted to a high-sensitivity analysis instrument 106, and the flue gas directly sucked and captured by the smoking machine 104 contains components such as oxygen and moisture, which will affect the service life of the chromatographic column during chromatographic analysis.

[0033] The above embodiments are only used to exemplarily illustrate the principles and effects of the present invention, rather than to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An on-line aerosol trapping and sampling device, characterized in that it includes a cylinder, the cylinder is separated into two parts from the right side, obtaining a first cylinder and a second cylinder, the second cylinder is detachably connected to the first cylinder, gas flow paths are provided at the upper, lower, left and right positions of the cylinder, the gas flow paths on the upper and lower sides are communicated with each other, and the gas flow path on the upper side is communicated with an analytical instrument through a sampling port, the gas flow path on the lower side is communicated with a gas generator, the gas flow path on the left side is communicated with a smoking device, the gas flow path on the right side is communicated with a smoking machine, a pipeline is spirally wound around the surface of the cylinder, and the pipeline is used for cooling the cylinder, and a heating plate is further arranged on the surface of the cylinder for heating the cylinder after aerosol trapping is completed.

2. The on-line aerosol trapping and sampling device according to claim 1, characterized in that the first cylinder and the second cylinder are connected by threads.

3. The on-line aerosol trapping and sampling device according to claim 1, characterized in that a high-temperature resistant sealing ring is arranged between the first cylinder and the second cylinder for sealing the gap between the first cylinder and the second cylinder.

4. The on-line aerosol trapping and sampling device according to claim 1, characterized in that solenoid valves are separately arranged for the gas flow paths on the upper and lower sides and the left and right ends of the cylinder.

5. The on-line aerosol trapping and sampling device according to claim 1, characterized in that the inside of the cylinder is a hollow structure, and a glass fiber sheet is placed inside the cylinder.

6. The on-line aerosol trapping and sampling device according to claim 1, characterized in that the pipeline is purged with coolant or liquid nitrogen to realize the cooling of the cylinder.

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