Portable device for detecting performance of activated carbon in adsorbing VOCs

Abstract

The utility model discloses a portable detection active carbon adsorption VOCs performance device belongs to the technical field of detection active carbon, including draw -bar box subassembly, set up filter drying subassembly in draw -bar box subassembly, flow regulation subassembly, carbon tetrachloride gas generating subassembly, active carbon adsorption subassembly, tail gas adsorption subassembly, the filter drying subassembly is set to draw -bar box subassembly's baffle outside and is set up filter drying subassembly, the filter drying subassembly includes pagoda type copper sintering filter, discoloration silica gel filter, anhydrous calcium chloride filter, one end of pagoda type copper sintering filter is set up discoloration silica gel filter, one end of discoloration silica gel filter is set up anhydrous calcium chloride filter, one end of filter drying subassembly is set up flow regulation subassembly, and flow regulation subassembly includes first three -way electromagnetic valve, second three -way electromagnetic valve, diaphragm pump, flow regulating valve and buffer tank, can realize the active carbon adsorption performance of different places and carry out the quick check, guarantees the detection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of activated carbon detection technology, specifically relating to a portable device for detecting the adsorption performance of activated carbon on VOCs. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Activated carbon, as a material with high adsorption capacity, plays a vital role in environmental protection. Its unique pore structure and surface chemical properties give it broad application potential in air purification, water treatment, and soil remediation. It is particularly important to replace activated carbon according to prescribed cycles in industries such as industrial waste gas treatment and air purification; failure to replace activated carbon in a timely manner will result in the ineffective adsorption of volatile organic compounds (VOCs), leading to direct emissions into the environment and causing air pollution. Carbon tetrachloride has a relatively large molecular diameter (approximately 0.6 nm), while VOCs are mostly gaseous macromolecular organic compounds (such as benzene and toluene). For example, benzene has a molecular diameter of 0.58 nm; the two are similar in size, therefore, the adsorption value of activated carbon for carbon tetrachloride can more accurately reflect the adsorption effect of activated carbon on VOCs in practical applications. Traditional carbon tetrachloride adsorption detection devices occupy an area greater than 1 square meter, weigh more than 20 kilograms, and require more than 2 hours to test a single sample.

[0004] Traditional carbon tetrachloride adsorption detection devices suffer from problems such as large weight and low detection efficiency, leading to numerous limitations in practical applications. The large weight makes the device difficult to move flexibly, unable to adapt to on-site testing scenarios, and can only be used in a fixed laboratory, greatly limiting the detection range. This is especially true when rapid verification of activated carbon adsorption performance at different locations is required; the inconvenience of transportation and deployment significantly increases testing costs and time. Furthermore, the low detection efficiency results in excessively long testing times for each test, making it difficult to meet the needs of rapid testing of batch samples or emergency testing. When it is necessary to promptly determine whether activated carbon has failed and decide whether to replace it, excessively long testing cycles may result in volatile organic compound (VOC) emissions not being effectively treated in a timely manner, thus increasing the risk of environmental pollution. Utility Model Content

[0005] To address the aforementioned issues, this invention provides a portable device for detecting the VOCs adsorption performance of activated carbon, which ensures detection efficiency, enables the detection of activated carbon adsorption performance at different locations, and allows for rapid verification.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A portable device for detecting the performance of activated carbon adsorption of VOCs includes a trolley case assembly, which contains a filter drying assembly, a flow regulation assembly, a carbon tetrachloride gas generating assembly, an activated carbon adsorption assembly, and an exhaust gas adsorption assembly. The outer side of the partition of the trolley case assembly is provided with a filter and drying component, which includes a pagoda-shaped copper sintered filter, a color-changing silica gel filter, and an anhydrous calcium chloride filter; a color-changing silica gel filter is provided at one end of the pagoda-shaped copper sintered filter, and an anhydrous calcium chloride filter is provided at the other end of the color-changing silica gel filter. One end of the filter drying assembly is provided with a flow regulating component, which includes a first three-way solenoid valve, a second three-way solenoid valve, a diaphragm pump, a flow regulating valve, and a buffer tank. One end of the anhydrous calcium chloride filter is provided with a first three-way solenoid valve, one end of the first three-way solenoid valve is provided with a diaphragm pump, one end of the diaphragm pump is provided with a buffer tank, one end of the buffer tank is provided with a second three-way solenoid valve, and one end of the second three-way solenoid valve is provided with a flow regulating valve. One end of the flow regulating component is provided with a carbon tetrachloride gas generating component, one end of the carbon tetrachloride gas generating component is provided with an activated carbon adsorption component, and one end of the activated carbon adsorption component is provided with a tail gas adsorption component.

[0007] As a further technical solution, the suitcase assembly includes a suitcase, a partition, a bottom plate, and a cooling fan. The upper end of the suitcase is provided with a partition, and the lower end is provided with a bottom plate. The partition is provided with a groove, and the filter drying component and the exhaust gas adsorption component are disposed in the groove of the partition. The flow regulating component, the carbon tetrachloride gas generating component, and the activated carbon adsorption component are disposed between the partition and the bottom plate and mounted on the bottom plate. The cooling fan is mounted on the side of the suitcase.

[0008] As a further technical solution, one end of the color-changing silica gel filter is connected to a pagoda-shaped copper sintered filter, and the other end of the color-changing silica gel filter is connected to one end of an anhydrous calcium chloride filter through a polytetrafluoroethylene (PTFE) pipe; the other end of the anhydrous calcium chloride filter is connected to one end of a first three-way solenoid valve through a PTFE pipe, and a pagoda-shaped copper sintered filter is installed on the upper end of the first three-way solenoid valve; the other end of the first three-way solenoid valve is connected to the air inlet of a diaphragm pump through a PTFE pipe, and the air outlet of the diaphragm pump is connected to one end of a buffer tank through a PTFE pipe. The first three-way solenoid valve is provided with a first solenoid valve support at its lower end, and the second three-way solenoid valve is provided with a second solenoid valve support at its lower end.

[0009] As a further technical solution, the other end of the buffer tank is connected to one end of the second three-way solenoid valve through a polytetrafluoroethylene (PTFE) pipeline. A pagoda-shaped copper sintered filter is installed on the upper end of the second three-way solenoid valve, and the other end of the second three-way solenoid valve is connected to one end of the flow regulating valve through a PTFE pipeline.

[0010] As a further technical solution, the carbon tetrachloride gas generating assembly includes a cooling fan, a solvent bottle, a solvent bottle support, a semiconductor cooling chip, a solvent bottle cap, a first semiconductor cooling chip pressure plate, a heating jacket, a temperature sensor, insulation cotton, a solvent bottle heat insulation column, a volume bottle sealing ring, an inlet pipe, an inlet pipe filter, an outlet filter, and a set screw. A cooling fan is installed inside the solvent bottle support. Several solvent bottle heat insulation columns are installed at the upper end of the solvent bottle support. A first semiconductor refrigeration plate is installed at the upper end of the solvent bottle heat insulation column. A semiconductor refrigeration plate is installed at the upper end of the first semiconductor refrigeration plate. A solvent bottle is installed at the upper end of the semiconductor refrigeration plate. The outside of the solvent bottle is covered with heat insulation cotton. A heating sleeve is installed between the heat insulation cotton and the solvent bottle.

[0011] As a further technical solution, a solvent bottle cap is provided at the upper end of the solvent bottle, a temperature sensor is provided at the bottom side of the solvent bottle, and a set screw is provided at the upper part of the temperature sensor; a groove is provided on the upper surface of the solvent bottle, and a solvent bottle sealing ring is provided in the groove; an air inlet filter is provided inside the solvent bottle, and one end of the air inlet filter is connected to the air inlet pipe.

[0012] As a further technical solution, the activated carbon adsorption assembly includes a cooling fan, an adsorption bottle, an adsorption bottle support, a semiconductor cooling chip, an adsorption bottle cap, a second semiconductor cooling chip pressure plate, a heating jacket, a temperature sensor, insulation cotton, an adsorption bottle heat insulation column, an adsorption bottle sealing ring, a heat-conducting block, a heat-conducting block sealing ring, a sample bottle, a sample bottle sealing ring, a top screw, a gas chamber, a gas chamber sealing ring, filter paper, and a plug. A cooling fan is installed inside the adsorption bottle support. Several adsorption bottle heat insulation columns are installed at the upper end of the adsorption bottle support. A second semiconductor refrigeration plate is installed at the upper end of the adsorption bottle heat insulation column. A semiconductor refrigeration plate is installed at the upper end of the second semiconductor refrigeration plate. The semiconductor refrigeration plate is installed in the semiconductor refrigeration plate mounting port of the gas chamber. An air inlet is provided on the side of the gas chamber. A gas chamber sealing ring mounting groove is provided on the upper surface of the gas chamber. A gas chamber sealing ring is installed in the gas chamber sealing ring mounting groove.

[0013] As a further technical solution, an adsorption bottle is provided at the upper end of the gas chamber, and several small holes are provided at intervals on the lower surface of the adsorption bottle; an adsorption bottle cap is provided at the upper part of the adsorption bottle, and a groove is provided on the upper surface of the adsorption bottle, with an adsorption bottle sealing ring provided in the groove; a temperature sensor mounting port is provided on the side of the adsorption bottle, and a temperature sensor is installed in the temperature sensor mounting port, with a set screw provided at the upper end of the temperature sensor, and the set screw is located in the set screw mounting port; the outside of the adsorption bottle is covered with heat insulation cotton, and a heating sleeve is provided between the heat insulation cotton and the adsorption bottle; an air outlet is provided on the side of the adsorption bottle. The heat-conducting block has several holes, in which sample bottles or plugs are placed; a sample bottle sealing ring is installed on the sample bottle, and filter paper is placed at the bottom of the sample bottle; a heat-conducting block sealing ring is installed on the heat-conducting block; and a sample bottle sealing ring is installed on the plug.

[0014] As a further technical solution, a control component is also included, which includes a power socket, a USB socket, a touch screen, a printer, a circuit board, and software programs. A touch screen is provided on the outer side of the partition. The touch screen has a built-in circuit board and software program. A printer is provided at the front of the touch screen. A power socket is provided at one end of the printer. An electronic balance is provided at the other end of the printer. A USB socket is provided at the front of the printer.

[0015] As a further technical solution, the exhaust gas adsorption assembly includes an activated carbon filter and a pagoda-shaped copper sintered filter. One end of the activated carbon filter is provided with a pagoda-shaped copper sintered filter, and the other end of the activated carbon filter is connected to the activated carbon absorption assembly through a polytetrafluoroethylene pipeline.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are: In the filtration and drying assembly of this invention, the pagoda-shaped copper sintered filter first performs preliminary filtration of the incoming air, intercepting tiny liquid water droplets and impurity particles. The air then enters a color-changing silica gel filter for further adsorption of moisture, followed by deep drying through an anhydrous calcium chloride filter. This triple filtration and drying structure works sequentially to ensure that the air subsequently used for testing is clean and free from moisture interference, guaranteeing the accuracy of the test. When the flow regulation assembly starts, the first and second three-way solenoid valves first connect the diaphragm pump to the ambient air, achieving no-load start-up and preventing the diaphragm pump from being affected by excessive load during startup, thus ensuring operational stability. After startup, the first and second three-way solenoid valves switch the diaphragm pump to the gas path of the testing device, providing gas delivery power. The output gas first enters a buffer tank, where pressure stabilization eliminates gas pulsation, maintaining stable gas pressure and flow. It then passes through the second three-way solenoid valve to the flow regulation valve, which precisely controls the gas flow rate, allowing the gas to enter the carbon tetrachloride gas generating assembly at an appropriate rate. Within the carbon tetrachloride gas generating assembly, a cooling fan on the solvent bottle support, along with a semiconductor cooling chip, insulation cotton, a heating mantle, and a temperature sensor, works together to maintain a stable temperature environment inside the assembly. The inlet pipe introduces regulated gas into the solvent bottle, and an inlet pipe filter disperses the gas, ensuring sufficient contact between the gas and carbon tetrachloride to form saturated carbon tetrachloride gas. An outlet filter prevents trace amounts of liquid carbon tetrachloride from flowing out with the gas, ensuring that the gas entering the activated carbon adsorption assembly is pure, saturated carbon tetrachloride gas. In the activated carbon adsorption assembly, the cooling fan on the adsorption bottle support, along with the semiconductor cooling chip, insulation cotton, heating mantle, and temperature sensor, collaboratively regulate the temperature of the activated carbon adsorption assembly. The gas chamber receives saturated carbon tetrachloride gas through the inlet and enters the adsorption bottle. Small holes on the lower surface of the adsorption bottle evenly distribute the gas, ensuring sufficient contact between the gas and the activated carbon to be tested in the sample bottle, allowing the activated carbon to saturate and adsorb the carbon tetrachloride gas. During the adsorption process, the temperature sensor monitors the temperature in real time to ensure the stable progress of the adsorption reaction. The touchscreen display in the control unit houses the circuit board and software program, displaying the real-time operating status of each component. It dynamically monitors parameters such as the filtration effect of the filtration and drying component, the gas flow rate of the flow regulation component, and the temperature of the carbon tetrachloride gas generation component and the activated carbon adsorption component. If parameter deviations occur, it promptly issues instructions to adjust the operation of the relevant components. After the test is completed, the printer can quickly output the test results without waiting for data processing. The entire process from gas source treatment, flow regulation, gas generation, adsorption reaction to result output is closely integrated, greatly improving the testing efficiency.

[0017] This utility model's trolley case assembly serves as the mounting carrier, employing a layered layout structure constructed with partitions and a base plate to provide orderly installation space for each component. The grooves on the partitions are specifically designed to house the filter-drying assembly and the exhaust gas adsorption assembly. The pagoda-shaped copper sintered filter, color-changing silica gel filter, and anhydrous calcium chloride filter of the filter-drying assembly are sequentially connected via PTFE tubing and embedded entirely within the grooves. Similarly, the activated carbon filter of the exhaust gas adsorption assembly is connected to and fixed within the pagoda-shaped copper sintered filter, ensuring both stable installation of these two types of components and facilitating subsequent maintenance and component replacement. The space between the partition and the base plate is arranged according to the component volume and functional correlation. The first three-way solenoid valve of the flow regulation component is supported and fixed on the base plate through the first solenoid valve, and the second three-way solenoid valve is supported and fixed on the base plate through the second solenoid valve. The diaphragm pump, buffer tank and flow regulation valve are connected and fixed in corresponding positions on the base plate through PTFE pipelines. The spacing between each component is reasonable to avoid mutual interference during operation. The solvent bottle of the carbon tetrachloride gas generating component is supported and fixed on the base plate. A cooling fan is installed in the solvent bottle support. The upper end is connected to the first semiconductor cooling chip pressure plate through the solvent bottle heat insulation column. A semiconductor cooling chip is installed on the first semiconductor cooling chip pressure plate. The solvent bottle is placed on the semiconductor cooling chip. The outside of the solvent bottle is covered with heat insulation cotton. A heating jacket is set between the heat insulation cotton and the solvent bottle to form a complete gas generation structure. The adsorption bottle of the activated carbon adsorption component is supported and fixed on the base plate. The cooling fan in the adsorption bottle support, together with the upper adsorption bottle heat insulation column, the second semiconductor cooling chip pressure plate, the semiconductor cooling chip, the heat insulation cotton and the heating jacket, jointly regulate the temperature environment inside the adsorption bottle. The adsorption bottle is precisely connected with the gas chamber, sample bottle and other components to ensure smooth gas flow. Furthermore, the touchscreen display for the control components is mounted on the upper right side of the outer side of the partition, facilitating observation and operation by the operator. The printer, power socket, and USB socket are logically arranged around the touchscreen display, while the electronic balance is placed next to the printer. All control-related components are centrally located for convenient operation and data processing. All components are interconnected via PTFE tubing and supporting structures, tightly integrated within a rolling case. The overall design of the rolling case allows for easy movement of the device, enabling it to be easily transported to different testing locations to meet on-site testing needs and effectively overcome the limitations of traditional devices that are fixed in the laboratory. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0019] Figure 1 This is a schematic diagram of the workflow of this utility model; Figure 2 This is a schematic diagram of the structure of the present invention installed on the trolley case and the partition; Figure 3 This is a schematic diagram of the structure of this utility model mounted on the base plate; Figure 4 This is a schematic diagram of the carbon tetrachloride gas generating component of this utility model; Figure 5 This is a schematic diagram of the activated carbon adsorption component of this utility model; Figure 6 A schematic diagram of the structure for installing the heat-conducting block sealing ring in this utility model; Figure 7 A schematic diagram of the sample bottle sealing ring and filter paper structure for installing the sample bottle of this utility model; Figure 8 A schematic diagram of the sample bottle sealing ring structure for installing the plug in this utility model; Figure 9 This is a schematic diagram of the adsorption bottle structure of this utility model. Figure 1 ; Figure 10 This is a schematic diagram of the adsorption bottle structure of this utility model. Figure 2 ; Figure 11 This is a schematic diagram of the air chamber structure of this utility model. Figure 1 ; Figure 12 This is a schematic diagram of the air chamber structure of this utility model. Figure 2 ; In the diagram: 1. Partition; 2. Activated carbon filter; 3. Power socket; 4. USB socket; 5. Base plate; 6. Electronic balance; 7. PTFE tubing; 8. Second three-way solenoid valve; 9. Luggage; 10. Cooling fan; 11. Pagoda-shaped copper sintered filter; 12. Color-changing silica gel filter; 13. Anhydrous calcium chloride filter; 14. Diaphragm pump; 15. First three-way solenoid valve; 16. Buffer tank; 17. Flow regulating valve; 18. Solvent bottle; 19. Solvent bottle support; 20. Semiconductor cooling chip; 21. Solvent bottle cap; 22. First semiconductor cooling chip pressure plate; 23. Heating jacket; 24. Temperature sensor; 25. Insulation cotton; 26. Solvent bottle insulation column; 27. Solvent bottle sealing ring; 28. Air inlet pipe 29. Inlet filter; 30. Outlet filter; 31. First solenoid valve support; 32. Second solenoid valve support; 33. Adsorption bottle; 34. Adsorption bottle support; 35. Adsorption bottle cap; 36. Second semiconductor refrigeration plate; 37. Adsorption bottle heat insulation column; 38. Adsorption bottle sealing ring; 39. Heat-conducting block; 40. Heat-conducting block sealing ring; 41. Sample bottle; 42. Sample bottle sealing ring; 43. Top screw; 44. Display screen; 45. Printer; 46. Circuit board and software program; 47. Gas chamber; 48. Gas chamber sealing ring; 49. Filter paper; 50. Plug; 51. Inlet; 52. Outlet; 53. Small hole; 54. Activated carbon absorption assembly; 55. Carbon tetrachloride gas generating assembly; 56. Temperature sensor mounting port; 57. Top screw mounting port; 58. Gas chamber sealing ring mounting groove; 59. Semiconductor refrigeration chip mounting port. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses a portable device for detecting the adsorption performance of activated carbon for VOCs, such as... Figure 1 As shown, the device includes a suitcase assembly, which contains a filter and drying assembly, a flow regulation assembly, a carbon tetrachloride gas generating assembly 55, an activated carbon adsorption assembly 54, and an exhaust gas adsorption assembly. A filter and drying assembly is installed on the outer side of the partition 1 of the suitcase assembly. The filter and drying assembly includes a pagoda-shaped copper sintered filter 11, a color-changing silica gel filter 12, and an anhydrous calcium chloride filter 13. A color-changing silica gel filter 12 is installed at one end of the pagoda-shaped copper sintered filter 11, and an anhydrous calcium chloride filter 13 is installed at one end of the color-changing silica gel filter 12. A flow regulating assembly is installed at one end of the filter and drying assembly. The flow regulating assembly includes a first three-way solenoid valve 15, a second three-way solenoid valve 8, a diaphragm pump 14, a flow regulating valve 17, and a buffer tank 16. A first three-way solenoid valve 15 is installed at one end of the anhydrous calcium chloride filter 13, a diaphragm pump 14 is installed at one end of the first three-way solenoid valve 15, a buffer tank 16 is installed at one end of the diaphragm pump 14, a second three-way solenoid valve 8 is installed at one end of the buffer tank 16, and a flow regulating valve 17 is installed at one end of the second three-way solenoid valve 8. A carbon tetrachloride gas generating component 55 is provided at one end of the flow regulating component, an activated carbon adsorption component 54 is provided at one end of the carbon tetrachloride gas generating component 55, and a tail gas adsorption component is provided at one end of the activated carbon adsorption component 54.

[0022] Specifically, in the filtration and drying assembly, the pagoda-shaped copper sintered filter 11 first performs preliminary filtration on the incoming air, intercepting tiny liquid water droplets and impurity particles. Then, the air enters the color-changing silica gel filter 12, which further adsorbs water vapor. Next, it passes through the anhydrous calcium chloride filter 13 for deep drying. The triple filtration and drying structure works in sequence to ensure that the air participating in the subsequent testing is clean and free from water vapor interference, thus ensuring the accuracy of the test. When the flow regulation component is started, the first three-way solenoid valve 15 and the second three-way solenoid valve 8 first connect the diaphragm pump 14 to the ambient air to achieve no-load start-up, avoiding the impact of excessive load on the operation stability of the diaphragm pump during start-up. After start-up, the first three-way solenoid valve 15 and the second three-way solenoid valve 8 switch the diaphragm pump 14 to the gas circuit of the detection device to provide gas delivery power for the device. The output gas first enters the buffer tank 16, and the pressure stabilization effect of the buffer tank 16 eliminates gas pulsation, keeping the gas pressure and flow stable. Then, it is delivered to the flow regulation valve 17 through the second three-way solenoid valve 8. The flow regulation valve 17 precisely controls the gas flow rate, allowing the gas to enter the carbon tetrachloride gas generating component 55 at a suitable rate. Inside the carbon tetrachloride gas generating assembly 55, the cooling fan 10 on the solvent bottle support 19, together with the semiconductor cooling chip 20, insulation cotton 25, heating jacket 23 and temperature sensor 24, maintain a stable temperature environment inside the carbon tetrachloride gas generating assembly 55. The inlet pipe 28 introduces the regulated gas into the solvent bottle 18, and the inlet pipe filter 29 disperses the gas, so that the gas and carbon tetrachloride can fully contact each other to form saturated carbon tetrachloride gas. The outlet filter 30 prevents liquid carbon tetrachloride from flowing out with the gas, ensuring that the gas entering the activated carbon adsorption assembly 54 is pure saturated carbon tetrachloride gas. In the activated carbon adsorption assembly 54, the cooling fan 10 on the adsorption bottle support 34, together with the semiconductor cooling chip 20, heating jacket 23, temperature sensor 24, and insulation cotton 25, coordinate to regulate the temperature of the activated carbon adsorption assembly 54. The gas chamber 47 receives saturated carbon tetrachloride gas through the gas inlet 51. The gas enters the adsorption bottle 33 through the gas chamber 47. The small holes 53 on the lower surface of the adsorption bottle 33 evenly distribute the gas, so that the gas can fully contact the activated carbon to be tested in the sample bottle 41, allowing the activated carbon to saturately adsorb the carbon tetrachloride gas. During the adsorption process, the temperature sensor 24 monitors the temperature in real time to ensure that the adsorption reaction proceeds stably. The touch screen 44 in the control component has a built-in circuit board and software program 46, which displays the operating status of each component in real time. It dynamically monitors parameters such as the filtration effect of the filter drying component, the gas flow rate of the flow regulation component, and the temperature of the carbon tetrachloride gas generating component 55 and the activated carbon adsorption component 54. If parameter deviations occur, it promptly issues instructions to adjust the operation of the relevant components. After the test is completed, the printer 45 can quickly output the test results without waiting for data processing. The entire process of each component, from gas source treatment, flow regulation, gas generation, adsorption reaction to result output, is closely connected, which greatly improves the testing efficiency.

[0023] Specifically, the common terminal of the first three-way solenoid valve 15 is connected to the air inlet of the diaphragm pump 14, the normally open terminal is connected to the outlet of the filter drying component, and the normally closed terminal is connected to the pagoda-type copper sintered filter 11; the common terminal of the second three-way solenoid valve 8 is connected to the air outlet of the buffer tank 16, the normally open terminal is connected to the inlet of the flow regulating valve 17, and the normally closed terminal is connected to the pagoda-type copper sintered filter 11. When the diaphragm pump 14 starts, its air inlet and outlet are connected to the external ambient air through the first three-way solenoid valve 15 and the second three-way solenoid valve 8 respectively, so that the diaphragm pump 14 starts without load. After starting, the inlet and outlet of the diaphragm pump 14 are connected to the detection device in sequence. In order to eliminate the pulsation generated when the diaphragm pump 14 delivers air, a buffer tank 16 is designed to ensure the stability of the pressure and flow rate of the output gas. The flow rate of the gas entering the carbon tetrachloride gas generating component 55 is controlled at about 1.2 liters per minute by the flow regulating valve 17. The components are connected by polytetrafluoroethylene pipes 7. The diaphragm pump 14, buffer tank 16, first solenoid valve support 31, and second solenoid valve support 32 are all mounted on the base plate 5.

[0024] The rolling case assembly serves as the mounting carrier, and its layered layout structure, constructed via partition 1 and base plate 5, provides orderly installation space for each component. The grooves on partition 1 are specifically designed to house the filter-drying assembly and the exhaust gas adsorption assembly. The pagoda-shaped copper sintered filter 11, color-changing silica gel filter 12, and anhydrous calcium chloride filter 13 of the filter-drying assembly are sequentially connected via PTFE tubing 7 and embedded entirely within the grooves. Similarly, the activated carbon filter 2 of the exhaust gas adsorption assembly is connected to the pagoda-shaped copper sintered filter 11 and fixed within the grooves. This ensures the stable installation of both types of components and facilitates subsequent maintenance and replacement of parts. The space between the partition plate 1 and the base plate 5 is arranged according to the component volume and functional correlation. The first three-way solenoid valve 15 of the flow regulating component is fixed to the base plate 5 through the first solenoid valve support 31, and the second three-way solenoid valve 8 is fixed to the base plate 5 through the second solenoid valve support 32. The diaphragm pump 14, buffer tank 16 and flow regulating valve 17 are sequentially connected and fixed to the corresponding positions on the base plate 5 through PTFE pipes 7. The spacing between each component is reasonable to avoid mutual interference during operation. The solvent bottle support 19 of the carbon tetrachloride gas generating component 55 is fixed to the base plate 5. A cooling fan 10 is installed inside the solvent bottle support 19, and the upper end is connected to the first semiconductor cooling plate 22 through the solvent bottle heat insulation column 26. A semiconductor cooling chip 20 is mounted on a semiconductor cooling chip pressure plate 22. A solvent bottle 18 is placed above the semiconductor cooling chip 20, and the solvent bottle 18 is covered with insulation cotton 25. A heating sleeve 23 is set between the insulation cotton 25 and the solvent bottle 18 to form a complete gas generation structure. The adsorption bottle support 34 of the activated carbon adsorption component 54 is fixed on the base plate 5. The cooling fan 10 inside the adsorption bottle support 34, together with the upper adsorption bottle heat insulation column 37, the second semiconductor cooling chip pressure plate 36, the semiconductor cooling chip 20, the heating sleeve 23, and the insulation cotton 25, jointly regulate the temperature environment inside the adsorption bottle 33. The adsorption bottle 33 is precisely connected with components such as the gas chamber 47 and the sample bottle 41 to ensure smooth gas flow. In addition, the touch screen 44 of the control component is installed on the upper right side of the outer side of the partition 1 for easy observation and operation by the operator. The printer 45, power socket 3, and USB socket 4 are arranged around the touch screen 44. The electronic balance 6 is placed next to the printer 45. All control-related components are centrally arranged for convenient operation and data processing. All components are interconnected through PTFE tubing 7 and supporting structures, and are tightly integrated within the trolley case 9. The overall structural design of the trolley case 9 allows the device to be easily moved and transported to different testing locations, meeting on-site testing needs and effectively overcoming the limitation of traditional devices that can only be fixed in the laboratory.

[0025] like Figure 2 and Figure 3As shown, the suitcase assembly includes a suitcase 9, a partition 1, a bottom plate 5, and a cooling fan 10. The upper end of the suitcase 9 is provided with the partition 1, and the lower end is provided with the bottom plate 5. A groove is provided on the partition 1, and the filter drying component and the exhaust gas adsorption component are arranged in the groove of the partition 1. The flow regulating component, the carbon tetrachloride gas generating component 55, and the activated carbon adsorption component 54 are arranged between the partition 1 and the bottom plate 5 and are installed on the bottom plate 5. The cooling fan 10 is installed on the side of the suitcase.

[0026] Specifically, as the overall load-bearing structure, the partition 1 is first horizontally installed at the upper part of the interior of the suitcase 9, and the bottom plate 5 is correspondingly installed at the lower part of the interior of the suitcase 9, so that the partition 1 and the bottom plate 5 form an upper and lower installation space inside the suitcase 9. Adaptive grooves are made on the upper surface of the partition 1 according to the external dimensions of the filter-drying component and the exhaust gas adsorption component. The filter-drying component is embedded entirely into one groove of the partition 1, and the exhaust gas adsorption component is embedded into the other groove of the partition 1, ensuring that the two components are securely installed in the grooves and do not protrude from the surface of the partition 1. Subsequently, the flow regulating component, the carbon tetrachloride gas generating component 55, and the activated carbon adsorption component 54 are placed sequentially in the lower space between the partition 1 and the bottom plate 5 and installed on the bottom plate 5. The placement positions are adjusted according to the volume and connection requirements of each component, ensuring that sufficient space is reserved between the components for pipeline connections. Finally, mounting holes are made on the side of the suitcase 9, and the cooling fan 10 is fixed in the mounting holes so that the air inlet or outlet of the cooling fan 10 is connected to the inside of the suitcase 9 to dissipate heat from the components inside the suitcase.

[0027] One end of the color-changing silica gel filter 12 is connected to the pagoda-shaped copper sintered filter 11, and the other end of the color-changing silica gel filter 12 is connected to one end of the anhydrous calcium chloride filter 13 through the polytetrafluoroethylene (PTFE) pipe 7. The other end of the anhydrous calcium chloride filter 13 is connected to one end of the first three-way solenoid valve 15 through the PTFE pipe 7. The pagoda-shaped copper sintered filter 11 is installed on the upper end of the first three-way solenoid valve 15. The other end of the first three-way solenoid valve 15 is connected to the air inlet of the diaphragm pump 14 through the PTFE pipe 7, and the air outlet of the diaphragm pump 14 is connected to one end of the buffer tank 16 through the PTFE pipe 7. A first solenoid valve support 31 is provided at the lower end of the first three-way solenoid valve 15, and a second solenoid valve support 32 is provided at the lower end of the second three-way solenoid valve 8. The other end of the buffer tank 16 is connected to one end of the second three-way solenoid valve 8 through the polytetrafluoroethylene pipe 7. A pagoda-shaped copper sintered filter 11 is installed on the upper end of the second three-way solenoid valve 8. The other end of the second three-way solenoid valve 8 is connected to one end of the flow regulating valve 17 through the polytetrafluoroethylene pipe 7.

[0028] Specifically, when assembling the filter drying assembly and the flow regulation assembly, first align and fix one end of the color-changing silica gel filter 12 with the outlet end of the pagoda-shaped copper sintered filter 11, allowing air to directly enter the color-changing silica gel filter 12 from the pagoda-shaped copper sintered filter 11. Next, connect one end of the PTFE pipe 7 to the other end of the color-changing silica gel filter 12, and the other end of the PTFE pipe 7 to one end of the anhydrous calcium chloride filter 13, forming a passage for air to flow sequentially through the three filter components. Then, continue to connect the other end of the anhydrous calcium chloride filter 13 to one of the ports of the first three-way solenoid valve 15 using the PTFE pipe 7, while simultaneously installing a pagoda-shaped copper sintered filter 11 at the upper port of the first three-way solenoid valve 15. Then, connect the remaining port of the first three-way solenoid valve 15 to the inlet of the diaphragm pump 14 via the PTFE pipe 7, and connect the outlet of the diaphragm pump 14 to one end of the buffer tank 16 using the PTFE pipe 7. A first solenoid valve support 31 is installed at the lower end of the first three-way solenoid valve 15, and the bottom of the first solenoid valve support 31 is fixed to the base plate 5 to support and fix the first three-way solenoid valve 15. Similarly, a second solenoid valve support 32 is installed at the lower end of the second three-way solenoid valve 8 and fixed to the base plate 5. Finally, a PTFE pipe 7 is used to connect the other end port of the buffer tank 16 to one of the interfaces of the second three-way solenoid valve 8. A pagoda-shaped copper sintered filter 11 is installed at the upper interface of the second three-way solenoid valve 8. The remaining interface of the second three-way solenoid valve 8 is connected to one end port of the flow regulating valve 17 through the PTFE pipe 7, completing the connection and assembly of the entire filter drying assembly and flow regulating assembly.

[0029] like Figure 4 As shown, the carbon tetrachloride gas generating assembly 55 includes a cooling fan 10, a solvent bottle 18, a solvent bottle support 19, a thermoelectric cooler 20, a solvent bottle cap 21, a first thermoelectric cooler pressure plate 22, a heating jacket 23, a temperature sensor 24, insulation cotton 25, a solvent bottle heat insulation column 26, a volumetric bottle sealing ring 27, an air inlet pipe 28, an air inlet pipe filter 29, an air outlet filter 30, and a set screw 43. The cooling fan 10 is installed inside the solvent bottle support 19. Several solvent bottle heat insulation columns 26 are installed at the upper end of the solvent bottle support 19. The first thermoelectric cooler pressure plate 22 is installed at the upper end of the solvent bottle heat insulation column 26. The thermoelectric cooler 20 is installed at the upper end of the first thermoelectric cooler pressure plate 22. The solvent bottle 18 is installed at the upper end of the thermoelectric cooler 20. The outside of the solvent bottle 18 is covered with insulation cotton 25. A heating jacket 23 is installed between the insulation cotton 25 and the solvent bottle 18.

[0030] A solvent bottle cap 21 is provided at the top of the solvent bottle 18, and a temperature sensor 24 is provided at the bottom side of the solvent bottle 18. A set screw 43 is provided above the temperature sensor 24. A groove is provided on the upper surface of the solvent bottle 18, and a solvent bottle sealing ring 27 is provided in the groove. An air inlet filter 29 is provided inside the solvent bottle 18, and one end of the air inlet filter 29 is connected to the air inlet pipe 28. An air outlet filter 30 and the air inlet pipe 28 are respectively installed at corresponding positions on the solvent bottle cap 21.

[0031] Specifically, when assembling the carbon tetrachloride gas generating component 55, first, place the cooling fan 10 into the preset mounting position inside the solvent bottle support 19 and fix it to ensure that the cooling fan 10 can operate normally. On the upper surface of the solvent bottle support 19, evenly install several solvent bottle heat insulation columns 26 according to the design position, so that the solvent bottle heat insulation columns 26 support vertically upward. Next, place the first semiconductor cooling plate 22 on the upper end of the solvent bottle heat insulation column 26, adjust its position and fix it to keep the first semiconductor cooling plate 22 horizontal. Install the semiconductor cooling chip 20 on the upper surface of the first semiconductor cooling plate 22, ensuring that the semiconductor cooling chip 20 fits tightly with the plate. Subsequently, place the solvent bottle 18 on the upper end of the semiconductor cooling chip 20, so that the bottom of the solvent bottle 18 is in full contact with the semiconductor cooling chip 20 to achieve temperature conduction. Insulating cotton 25 is wrapped around the outer surface of the solvent bottle 18. During the wrapping process, a space is reserved between the insulating cotton 25 and the solvent bottle 18 for installing a heating sleeve 23. The heating sleeve 23 is fitted into the reserved space on the outside of the solvent bottle 18 so that the heating sleeve 23 can evenly wrap the solvent bottle 18. A solvent bottle cap 21 is installed at the upper end of the solvent bottle 18. A mounting hole is pre-set on the bottom side of the solvent bottle 18. A temperature sensor 24 is inserted into the mounting hole. A set screw 43 is installed at the corresponding position on the upper part of the temperature sensor 24 to tighten and fix the temperature sensor 24 and prevent it from loosening. A groove is made on the upper surface of the solvent bottle 18, and a solvent bottle sealing ring 27 is embedded in the groove to ensure the sealing of the solvent bottle cap 21 after it is connected to the solvent bottle 18. Finally, an air inlet filter 29 is placed inside the solvent bottle 18, one end of the air inlet pipe 28 is connected to the air inlet filter 29, the other end of the air inlet pipe 28 extends to the outside of the solvent bottle 18 and passes through the solvent bottle cap 21, and the outlet filter 30 is installed in the corresponding position of the solvent bottle cap 21, thus completing the overall assembly of the carbon tetrachloride gas generating component 55.

[0032] like Figure 5As shown, the activated carbon adsorption assembly 54 includes a cooling fan 10, an adsorption bottle 33, an adsorption bottle support 34, a semiconductor cooling chip 20, an adsorption bottle cap 35, a second semiconductor cooling chip pressure plate 36, a heating jacket 23, a temperature sensor 24, insulation cotton 25, an adsorption bottle heat insulation column 37, an adsorption bottle sealing ring 38, a heat-conducting block 39, a heat-conducting block sealing ring 40, a sample bottle 41, a sample bottle sealing ring 42, a top screw 43, a gas chamber 47, a gas chamber sealing ring 48, filter paper 49, and a plug 50; the adsorption bottle support 34 is equipped with... A cooling fan 10 is provided. Several adsorption bottle heat insulation columns 37 are provided on the upper end of the adsorption bottle support 34. A second semiconductor cooling chip pressure plate 36 is provided on the upper end of the adsorption bottle heat insulation column 37. A semiconductor cooling chip 20 is provided on the upper end of the second semiconductor cooling chip pressure plate 36. The semiconductor cooling chip 20 is installed in the semiconductor cooling chip mounting port 59 of the gas chamber 47. An air inlet 51 is provided on the side of the gas chamber 47. A gas chamber sealing ring mounting groove 58 is provided on the upper surface of the gas chamber 47. A gas chamber sealing ring 48 is installed in the gas chamber sealing ring mounting groove 58.

[0033] like Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 as well as Figure 12 As shown, an adsorption bottle 33 is provided at the upper end of the gas chamber 47, and several small holes 53 are provided at intervals on the lower surface of the adsorption bottle 33; an adsorption bottle cap 35 is provided at the upper part of the adsorption bottle 33, and a groove is provided on the upper surface of the adsorption bottle 33, in which an adsorption bottle sealing ring 38 is provided; a temperature sensor mounting port 56 is provided at the bottom side of the adsorption bottle 33, and a temperature sensor 24 is installed in the temperature sensor mounting port 56. A set screw 43 is provided at the upper end of the temperature sensor 24, and the set screw 43 is located in the set screw mounting port 57; the outside of the adsorption bottle 33 is covered with heat insulation cotton 25; a heating jacket 23 is provided between the heat insulation cotton 25 and the adsorption bottle 33, and an air outlet 52 is provided on the side of the adsorption bottle 33. The heat-conducting block 39 is disposed inside the adsorption bottle 33; the heat-conducting block 39 has several holes for placing the sample bottle 41 or the plug 50; The heat-conducting block 39 has several holes for placing sample vials 41 or plugs 50. Specifically, the heat-conducting block 39 has three holes for placing sample vials 41, meaning that a maximum of three samples can be tested at a time. When fewer than three samples need to be tested, the unused holes are blocked with plugs 50 equipped with sample vial sealing rings 42. During testing, the heat-conducting block 39 with its sealing rings 40 is installed inside the adsorption bottle 33. The sample vials 41 with their sealing rings 42 are placed inside the holes of the heat-conducting block 39, and the samples are placed on the filter paper 49 of the sample vials 41. Any remaining holes are blocked with plugs 50 equipped with their sealing rings 42.

[0034] A sample bottle sealing ring 42 is installed on the sample bottle 41, and filter paper 49 is placed at the bottom of the sample bottle 41; a heat-conducting block sealing ring 40 is installed on the heat-conducting block 39; and a sample bottle sealing ring 42 is installed on the plug 50.

[0035] Specifically, when assembling the activated carbon adsorption assembly 54, the cooling fan 10 is first installed in a designated position inside the adsorption bottle support 34 to ensure normal ventilation and heat dissipation. Several adsorption bottle insulation columns 37 are installed on the upper surface of the adsorption bottle support 34, evenly distributed to provide stable support. The second semiconductor cooling plate 36 is installed on the upper end of the adsorption bottle insulation columns 37 and fixed, keeping the plate horizontal. A semiconductor cooling chip 20 is installed on the upper end of the second semiconductor cooling plate 36, and a semiconductor cooling chip mounting port 59 is opened at the bottom of the gas chamber 47. The upper end of the semiconductor cooling chip 20 is embedded into the semiconductor cooling chip mounting port 59 of the gas chamber 47, connecting the gas chamber 47 and the semiconductor cooling chip 20. An air inlet 51 is pre-set on the side of the gas chamber 47 for subsequent gas pipeline connection; a gas chamber sealing ring mounting groove 58 is opened on the upper surface of the gas chamber 47, and the gas chamber sealing ring 48 is embedded into the mounting groove to enhance the sealing performance of the connection between the gas chamber 47 and the adsorption bottle 33. The adsorption bottle 33 is placed on top of the gas chamber 47, with the bottom of the adsorption bottle 33 in contact with the upper surface of the gas chamber 47. Several small holes 53 are spaced apart on the lower surface of the adsorption bottle 33 to ensure that the gas in the gas chamber 47 can enter the adsorption bottle 33 through the holes 53. An adsorption bottle cap 35 is installed on the upper part of the adsorption bottle 33. A groove is formed on the upper surface of the adsorption bottle 33, and an adsorption bottle sealing ring 38 is embedded in the groove to ensure a sealed connection between the adsorption bottle cap 35 and the adsorption bottle 33. A temperature sensor mounting port 56 is formed on the bottom side of the adsorption bottle 33. The temperature sensor 24 is inserted into this mounting port. A set screw mounting port 57 is formed on the side of the adsorption bottle 33 corresponding to the position of the temperature sensor mounting port 56. The set screw 43 is screwed into the set screw mounting port 57 to tighten the temperature sensor 24 and fix its position.

[0036] An insulating cotton 25 is wrapped around the outside of the adsorption bottle 33, and a heating jacket 23 is placed between the insulating cotton 25 and the adsorption bottle 33 to reduce the influence of external temperature on the internal environment of the adsorption bottle 33. An outlet 52 is opened on the side of the adsorption bottle 33 to discharge the adsorbed gas. Subsequently, a groove is pre-set on the outside of the sample bottle 41, and the sample bottle sealing ring 42 is installed in the groove. Filter paper 49 is placed at the bottom of the sample bottle 41 to hold the activated carbon sample to be tested. An adaptation groove is opened on the outside of the heat-conducting block 39, and the heat-conducting block sealing ring 40 is embedded in it. The sample bottle sealing ring 42 is also installed on the outside of the plug 50. When all the sample holes on the heat-conducting block 39 are not needed, the unused holes are plugged with the plug 50. Finally, the sample bottle 41 containing the filter paper 49 and the activated carbon sample is installed in the corresponding hole of the heat-conducting block 39, and the heat-conducting block 39 is connected to the bottom of the adsorption bottle 33 to complete the assembly of the activated carbon adsorption assembly 54.

[0037] like Figure 2 As shown, it also includes a control component, which includes a power socket 3, a USB socket 4, a touch screen 44, a printer 45, a circuit board and software program 46; the touch screen 44 is provided on the outer side of the partition 1, the touch screen 44 has a built-in circuit board and software program 46, the printer 45 is provided on the front of the touch screen 44, the power socket 3 is provided on one end of the printer 45, the electronic balance 6 is provided on the other end of the printer 45, and the USB socket 4 is provided on the front of the printer 45.

[0038] Specifically, first, determine the installation position on the outer side of the partition 1 according to the size and installation requirements of the touch screen 44, and fix the touch screen 44 to the partition 1. The touch screen 44 has a pre-installed integrated circuit board and software program 46 inside, so there is no need to install an additional circuit board and software program 46 separately. Install the printer 45 at the front of the touch screen 44, so that the operating surface of the printer 45 faces the direction of easy operation. Leave an appropriate distance between the printer 45 and the touch screen 44 to avoid mutual interference. Place a power socket 3 at one end of the printer 45. The power socket 3 is connected to the internal components of the device that require power through wires to provide power input to the entire device. Place an electronic balance 6 at the other end of the printer 45. The electronic balance 6 must be placed horizontally to accurately weigh the sample mass. Install a USB socket 4 at the front of the printer 45. The USB socket 4 is connected to the circuit board and software program 46 inside the touch screen 44 through a line to export test data and complete the assembly of the control components.

[0039] The circuit board and software program 46 are the core components of the testing device, and all the actions of the testing device are instructed by it; the display screen 44 is the human-computer interaction window, which displays the status of the experiment in real time and displays relevant data and results; the printer 45 is an embedded thermal printer used to print test results; the USB socket 4 is used to export relevant experimental data.

[0040] The exhaust gas adsorption assembly includes an activated carbon filter 2 and a pagoda-shaped copper sintered filter 11. One end of the activated carbon filter 2 is equipped with the pagoda-shaped copper sintered filter 11, and the other end of the activated carbon filter 2 is connected to the activated carbon absorption assembly 54 through a polytetrafluoroethylene pipeline 7.

[0041] Specifically, one end of the pagoda-shaped copper sintered filter 11 is aligned and fixedly connected to one end of the activated carbon filter 2, ensuring a tight connection. Then, one end of a PTFE pipe 7 is connected to the other end of the activated carbon filter 2, and the other end of the PTFE pipe 7 extends into the space between the partition 1 and the base plate 5, connecting to the outlet 52 of the activated carbon adsorption assembly 54. This allows the gas discharged from the activated carbon adsorption assembly 54 to enter the exhaust gas adsorption assembly through the PTFE pipe 7, completing the assembly of the exhaust gas adsorption assembly.

[0042] The activated carbon filter 2 is filled with activated carbon to adsorb carbon tetrachloride gas contained in the gas flowing out of the activated carbon adsorption component 54, thus preventing environmental pollution.

[0043] The method of using the portable activated carbon adsorption VOCs performance testing device includes the following steps: Open the top cover of the rolling case 9 and check if the equipment is intact, and whether the consumables in the filter drying component and the tail gas adsorption component need to be replaced. After the instrument is powered on and passes the self-test, assume that an experiment is to be conducted on a sample. Open the adsorption bottle cap 35 in the activated carbon adsorption component 54 and use the plug 50 with the sample bottle sealing ring 42 to block the unnecessary experimental holes in the heat-conducting block 39. Line the sample bottle 41 with filter paper 49 and weigh the sample bottle 41 with filter paper 49 using an electronic balance 6 (i.e., the mass of the empty adsorption tube). Then weigh the sample bottle 41 containing dried activated carbon (the activated carbon sample mass range is between 0.5 and 2 grams), which is the total mass before the test. Add a certain volume of carbon tetrachloride reagent to the carbon tetrachloride gas generating component 55 and seal the solvent bottle 18. Set various relevant working parameters through the display screen 44. The test time for one sample is usually set to about 5 minutes. After the experiment is completed, weigh the total mass after the test. The percentage of activated carbon adsorbed by carbon tetrachloride can be calculated using the following formula: Percentage of activated carbon adsorbed by carbon tetrachloride = (Total mass after test - Total mass before test) / (Total mass before test - Mass of empty adsorption tube) × 100%.

[0044] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A portable device for detecting the adsorption performance of activated carbon for VOCs, characterized in that, The package includes a suitcase assembly, which is equipped with a filter and drying assembly, a flow regulation assembly, a carbon tetrachloride gas generating assembly, an activated carbon adsorption assembly, and an exhaust gas adsorption assembly. The outer side of the partition of the trolley case assembly is provided with a filter and drying component, which includes a pagoda-shaped copper sintered filter, a color-changing silica gel filter, and an anhydrous calcium chloride filter; a color-changing silica gel filter is provided at one end of the pagoda-shaped copper sintered filter, and an anhydrous calcium chloride filter is provided at the other end of the color-changing silica gel filter. One end of the filter drying assembly is provided with a flow regulating component, which includes a first three-way solenoid valve, a second three-way solenoid valve, a diaphragm pump, a flow regulating valve, and a buffer tank. One end of the anhydrous calcium chloride filter is provided with a first three-way solenoid valve, one end of the first three-way solenoid valve is provided with a diaphragm pump, one end of the diaphragm pump is provided with a buffer tank, one end of the buffer tank is provided with a second three-way solenoid valve, and one end of the second three-way solenoid valve is provided with a flow regulating valve. One end of the flow regulating component is provided with a carbon tetrachloride gas generating component, one end of the carbon tetrachloride gas generating component is provided with an activated carbon adsorption component, and one end of the activated carbon adsorption component is provided with a tail gas adsorption component.

2. The portable device for detecting the adsorption performance of activated carbon for VOCs as described in claim 1, characterized in that, The suitcase assembly includes a suitcase, a partition, a bottom plate, and a cooling fan. The upper end of the suitcase is provided with a partition, and the lower end is provided with a bottom plate. The partition has a groove, and the filter drying component and the exhaust gas adsorption component are disposed in the groove of the partition. The flow regulating component, the carbon tetrachloride gas generating component, and the activated carbon adsorption component are disposed between the partition and the bottom plate and are mounted on the bottom plate. The cooling fan is mounted on the side of the suitcase.

3. The portable device for detecting the adsorption performance of activated carbon for VOCs as described in claim 1, characterized in that, One end of the color-changing silica gel filter is connected to a pagoda-shaped copper sintered filter, and the other end of the color-changing silica gel filter is connected to one end of an anhydrous calcium chloride filter through a polytetrafluoroethylene (PTFE) pipe; the other end of the anhydrous calcium chloride filter is connected to one end of a first three-way solenoid valve through a PTFE pipe, and a pagoda-shaped copper sintered filter is installed on the upper end of the first three-way solenoid valve; the other end of the first three-way solenoid valve is connected to the air inlet of a diaphragm pump through a PTFE pipe, and the air outlet of the diaphragm pump is connected to one end of a buffer tank through a PTFE pipe. The first three-way solenoid valve is provided with a first solenoid valve support at its lower end, and the second three-way solenoid valve is provided with a second solenoid valve support at its lower end.

4. The portable device for detecting the adsorption performance of activated carbon for VOCs as described in claim 3, characterized in that, The other end of the buffer tank is connected to one end of the second three-way solenoid valve via a PTFE pipe. A pagoda-shaped copper sintered filter is installed on the upper end of the second three-way solenoid valve, and the other end of the second three-way solenoid valve is connected to one end of the flow regulating valve via a PTFE pipe.

5. The portable device for detecting the adsorption performance of activated carbon for VOCs as described in claim 1, characterized in that, The carbon tetrachloride gas generating assembly includes a cooling fan, a solvent bottle, a solvent bottle support, a semiconductor cooling chip, a solvent bottle cap, a first semiconductor cooling chip pressure plate, a heating jacket, a temperature sensor, insulation cotton, a solvent bottle heat insulation column, a solvent bottle sealing ring, an inlet pipe, an inlet pipe filter, an outlet filter, and a set screw. A cooling fan is installed inside the solvent bottle support. Several solvent bottle heat insulation columns are installed at the upper end of the solvent bottle support. A first semiconductor refrigeration plate is installed at the upper end of the solvent bottle heat insulation column. A semiconductor refrigeration plate is installed at the upper end of the first semiconductor refrigeration plate. A solvent bottle is installed at the upper end of the semiconductor refrigeration plate. The outside of the solvent bottle is covered with heat insulation cotton. A heating sleeve is installed between the heat insulation cotton and the solvent bottle.

6. The portable device for detecting the adsorption performance of activated carbon for VOCs as described in claim 5, characterized in that, The solvent bottle has a solvent bottle cap at the top and a temperature sensor at the bottom side of the solvent bottle, with a set screw at the top of the temperature sensor; a groove is provided on the upper surface of the solvent bottle, and a solvent bottle sealing ring is provided in the groove; an air inlet filter is provided inside the solvent bottle, and one end of the air inlet filter is connected to the air inlet pipe.

7. The portable device for detecting the adsorption performance of activated carbon for VOCs as described in claim 1, characterized in that, The activated carbon adsorption assembly includes a cooling fan, an adsorption bottle, an adsorption bottle support, a semiconductor cooling chip, an adsorption bottle cap, a second semiconductor cooling chip pressure plate, a heating jacket, a temperature sensor, insulation cotton, an adsorption bottle heat insulation column, an adsorption bottle sealing ring, a heat-conducting block, a heat-conducting block sealing ring, a sample bottle, a sample bottle sealing ring, a top screw, a gas chamber, a gas chamber sealing ring, filter paper, and a plug. A cooling fan is installed inside the adsorption bottle support. Several adsorption bottle heat insulation columns are installed at the upper end of the adsorption bottle support. A second semiconductor refrigeration plate is installed at the upper end of the adsorption bottle heat insulation column. A semiconductor refrigeration plate is installed at the upper end of the second semiconductor refrigeration plate. The semiconductor refrigeration plate is installed in the semiconductor refrigeration plate mounting port of the gas chamber. An air inlet is provided on the side of the gas chamber. A gas chamber sealing ring mounting groove is provided on the upper surface of the gas chamber. A gas chamber sealing ring is installed in the gas chamber sealing ring mounting groove.

8. The portable device for detecting the adsorption performance of activated carbon for VOCs as described in claim 7, characterized in that, An adsorption bottle is provided at the upper end of the gas chamber, and several small holes are spaced apart on the lower surface of the adsorption bottle; an adsorption bottle cap is provided at the upper part of the adsorption bottle, and a groove is provided on the upper surface of the adsorption bottle, with an adsorption bottle sealing ring placed in the groove; a temperature sensor mounting port is provided on the side of the adsorption bottle, and a temperature sensor is installed in the temperature sensor mounting port, with a set screw at the upper end of the temperature sensor, and the set screw is located in the set screw mounting port; the outside of the adsorption bottle is covered with heat insulation cotton, and a heating sleeve is provided between the heat insulation cotton and the adsorption bottle; an air outlet is provided on the side of the adsorption bottle. The heat-conducting block has several holes, in which sample bottles or plugs are placed; a sample bottle sealing ring is installed on the sample bottle, and filter paper is placed at the bottom of the sample bottle; a heat-conducting block sealing ring is installed on the heat-conducting block; and a sample bottle sealing ring is installed on the plug.

9. The portable device for detecting the adsorption performance of activated carbon for VOCs as described in claim 1, characterized in that, It also includes control components, which include a power socket, a USB socket, a touch screen, a printer, a circuit board, and software programs; A touch screen is provided on the outer side of the partition. The touch screen has a built-in circuit board and software program. A printer is provided at the front of the touch screen. A power socket is provided at one end of the printer. An electronic balance is provided at the other end of the printer. A USB socket is provided at the front of the printer.

10. The portable device for detecting the adsorption performance of activated carbon for VOCs as described in claim 1, characterized in that, The exhaust gas adsorption assembly includes an activated carbon filter and a pagoda-shaped copper sintered filter. One end of the activated carbon filter is equipped with a pagoda-shaped copper sintered filter, and the other end of the activated carbon filter is connected to the activated carbon absorption assembly through a polytetrafluoroethylene pipeline.

Images