Automatic pressurizing and sampling system for halogen-containing greenhouse gas in ambient air
The automatic pressurized sampling system solves the problem of unmanned remote sampling of halogenated greenhouse gases in remote areas, achieving efficient and accurate sampling, and is suitable for quantitative analysis of extremely low concentrations of halogenated greenhouse gases.
Patent Information
- Application Number
- CN202520438976.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-13
AI Technical Summary
Existing halogenated greenhouse gas sampling equipment is difficult to use for unmanned remote sampling in remote areas due to high labor costs and problems such as adsorption of highly polar substances and insufficient sampling volume.
An automatic pressurized sampling system controlled by a programmable logic controller, combined with stainless steel tubes with an inner surface treated with silanization and an inert oil-free diaphragm pump, enables active pressurized sampling, avoids the adsorption of highly polar substances, and increases the sampling volume.
It enables unmanned remote sampling in remote areas, reduces labor costs, avoids the adsorption of highly polar substances, ensures sufficient sampling volume, and improves the quantitative accuracy of extremely low concentrations of halogenated greenhouse gases.
Smart Images
Figure CN223910597U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of gas sampling equipment, and specifically relates to an automatic pressurized sampling system for halogen-containing greenhouse gases in ambient air. BACKGROUND
[0002] Halogen-containing greenhouse gases are a kind of greenhouse gases that have a greater impact on global warming. Although the content of such substances in the air is extremely low, often in the ppt (10 -12 ) level, their global warming potential is very high, so their impact on the earth's climate cannot be ignored. The mainstream equipment currently available on the market for collecting halogen-containing greenhouse gases includes passive samplers previously commonly used for collecting volatile organic compounds (VOC) and active samplers for trace halogen-containing greenhouse gases that have entered the market in recent years. The above products are mainstream equipment for collecting halogen-containing greenhouse gases, which use different sampling principles (negative pressure and positive pressure sampling) to suck or press ambient air into a Suma canister. However, the above-mentioned equipment also has some shortcomings: (1) manual on-site switching of switches and valves is required to realize sample collection, which is not suitable in some harsh sampling environments or where labor costs are high. Monitoring of the atmospheric background concentration of halogen-containing greenhouse gases is of great significance, but atmospheric background concentration monitoring points are often located in remote areas far from urban non-point pollution sources, and the sampling points are often at high altitudes. These places are often sparsely populated and have poor road conditions, so sampling equipment that requires manual on-site operation is not very practical; (2) the stainless steel flow path in some samplers can adsorb some strongly polar substances such as methyl bromide and methyl iodide, affecting the accurate quantification of these strongly polar substances; (3) the volume of gas that can be collected by passive sampling devices is limited, and they are not suitable for the quantification of some halogen-containing greenhouse gases with extremely low concentrations (1-10 ppt), because a large sample volume is often required for the quantification of these substances, and the sample volume provided by passive sampling devices is directly related to the volume of the sampling canister, which is limited by the volume of the sampling canister. UTILITY MODEL CONTENT
[0003] The utility model aims at providing an automatic pressurized sampling system for halogen-containing greenhouse gases in ambient air, which solves the problem that samplers on the market cannot be remotely sampled, can collect air in remote places without human supervision, greatly saves labor costs, solves the problem of adsorption of some strongly polar substances such as methyl bromide and methyl iodide in air samples by active samplers on the market, and solves the problem that passive samplers commonly used on the market cannot collect enough volume of air. The utility model can collect enough volume of air sample by using active pressurized sampling to enhance the quantitative accuracy of extremely low concentration halogen-containing greenhouse gases in the subsequent analysis process.
[0004] In order to achieve the above object, the utility model adopts the following technical scheme:
[0005] An automatic pressurized sampling system for halogen-containing greenhouse gases in ambient air comprises a sampling tube, a sampling pump, an electronic pressure gauge, a plurality of sampling tanks, a programmable logic controller and a switch valve.
[0006] Further, the sampling tube at the gas inlet end of the switch valve is provided with a safety valve.
[0007] Further, the gas inlet end of the sampling tube is provided with a filter.
[0008] Further, the sampling tube is made of stainless steel with an inert surface treated by silanization, and the inner diameter of the sampling tube is 6 mm.
[0009] Further, the sampling pump is an inert oil-free diaphragm pump.
[0010] Further, the sampling tank is a Suma tank.
[0011] Further, the programmable logic controller is a Siemens S7-200 SMART.
[0012] After the above technical scheme is adopted, the utility model has the following beneficial effects:
[0013] 1. The utility model discloses an environmental air halogen-containing greenhouse gas automatic pressurization sampling system, which utilizes a programmable logic controller that can set a sampling program in advance to solve the limitation that mainstream samplers in the market cannot perform remote unmanned sampling. In addition, the sampling tube of the utility model is a stainless steel tube with an inner surface subjected to silanization inert treatment. The special stainless steel tube not only meets the sampling requirements of conventional halogen-containing greenhouse gases, but is also applicable to halogen-containing greenhouse gases with strong polarity, such as methyl bromide and methyl iodine, which are easily adsorbed by ordinary stainless steel. This avoids the limitation that the internal pipeline of the HN-ASA1-F sampler can adsorb strong-polarity halogen-containing greenhouse gases. In addition, the utility model adopts an active pressurization sampling mode, which increases the volume of the collected gas, which is of great significance for the quantification of extremely low-concentration substances in the later sampling process. This avoids the limitation that the sampling volume of the CS1200E passive sampler is insufficient.
[0014] 2. The utility model discloses an environmental air halogen-containing greenhouse gas automatic pressurization sampling system, which electrically connects a programmable logic controller with a sampling pump, an electronic pressure gauge and a safety valve. When the electronic pressure gauge collects the gas pressure in the sampling tube that is greater than a threshold value, the safety valve can be opened to discharge excessive gas in the sampling tube from the safety valve outward, or the sampling pump can be closed to stop the gas inlet, which can ensure that the pressure does not become too large to cause the explosion of some parts during the entire pressurization sampling process of the system.
[0015] 3. The utility model discloses an environmental air halogen-containing greenhouse gas automatic pressurization sampling system, which is provided with a filter at the gas inlet end of the sampling tube. The filter hole of the filter is 5 microns, which can prevent particulate matter from entering the sampling tube and avoid affecting the subsequent sampling. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The utility model discloses a structure schematic view.
[0017] The reference signs in the drawing are as follows:
[0018] 1. Sampling tube; 2. Sampling pump; 3. Electronic pressure gauge; 4. Sampling tank; 40. Gas inlet; 41. Gas outlet; 5. Programmable logic controller; 6. On-off valve; 7. Valve assembly; 70. Inlet electromagnetic valve; 71. Outlet electromagnetic valve; 8. Safety valve; 9. Filter. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and do not limit the utility model.
[0020] Please refer to Figure 1An automatic pressurized sampling system for environmental air halogen-containing greenhouse gases, comprising a sampling tube 1, a sampling pump 2, an electronic pressure gauge 3, a plurality of sampling tanks 4, a programmable logic controller 5 and a switch valve 6; the sampling pump 2 and the switch valve 6 are respectively arranged at both ends of the sampling tube 1, and the sampling pump 2 is used to suck the environmental air into the sampling tube 1 and press the environmental air into the sampling tank 4; a plurality of valve assemblies 7 are arranged on the sampling tube 1 between the sampling pump 2 and the switch valve 6; the valve assembly 7 comprises an air inlet electromagnetic valve 70 and an air outlet electromagnetic valve 71; the air inlet electromagnetic valve 70 is communicated with the sampling tube 1; the sampling tank 4 is respectively provided with an air inlet 40 and an air outlet 41; the air inlet 40 is docked with the air inlet electromagnetic valve 70, and the air outlet 41 is docked with the air outlet electromagnetic valve 71; the electronic pressure gauge 3 is arranged on the sampling tube 1 between the sampling pump 2 and the switch valve 6, and is used to collect the pressure of the gas in the sampling tube 1; the programmable logic controller 5 is electrically connected with the sampling pump 2, the electronic pressure gauge 3, the air inlet electromagnetic valve 70, the air outlet electromagnetic valve 71 and the switch valve 6.
[0021] As shown in Figure 1 , the sampling tube 1 at the air inlet end of the switch valve 6 is provided with a safety valve 8; the safety valve 8 is electrically connected with the programmable logic controller 5, and when the gas pressure in the sampling tube 1 is greater than a threshold value, the safety valve 8 is opened to discharge the gas.
[0022] As shown in Figure 1 , the air inlet end of the sampling tube 1 is provided with a filter 9; the material of the filter 9 is stainless steel with a silanized inert surface, and the filter hole is 5 mu m, wherein the silanized inert stainless steel is existing, and will not be described one by one here.
[0023] As shown in Figure 1 , the material of the sampling tube 1 is stainless steel with a silanized inert surface, and the inner diameter of the sampling tube 1 is 6 mm.
[0024] As shown in Figure 1 , the sampling pump 2 is an inert oil-free diaphragm pump.
[0025] As shown in Figure 1 , the sampling tank 4 is a Suma tank.
[0026] As shown in Figure 1 , the model of the programmable logic controller 5 is Siemens S7-200 SMART.
[0027] When the utility model works, one tank of environmental air is collected per day, and a total of six tanks are collected as an example, and the specific process is:
[0028] At the sampling site, 6 sampling cans 4 are respectively connected with 6 valve assemblies 7, so that the air inlet 40 is connected with the air inlet electromagnetic valve 70, and the air outlet 41 is connected with the air outlet electromagnetic valve 71. After the connection is completed, the valves of the sampling cans 4 are all opened. The programmable logic controller 5 is started, and the sampling process is executed according to the pre-set program. Specifically, first, the switch valve 6 is closed, then the air inlet electromagnetic valve 70 and the air outlet electromagnetic valve 71 on the first sampling can 4 are opened, and the air inlet electromagnetic valves 70 and the air outlet electromagnetic valves 71 of the remaining sampling cans 4 are closed. Then, the sampling pump 2 is started, and the ambient air passes through the filter 9 to filter out particulate matter, and then enters the first sampling can 4 along the inert sampling tube 1. At this time, the sampling system enters the flushing state, and the ambient air replaces the original air in the first sampling can 4. The flushing state is maintained for 10 minutes, and then the air outlet electromagnetic valve 71 of the first sampling can 4 is closed. At this time, the pressurized sampling state is entered, and with the sampling pump 2 continuously pressing air into the sampling tube 1, the air pressure in the entire sampling tube 1 continuously rises until it is higher than the ambient pressure by a certain threshold value (for example, 30 psi). At this time, the programmable logic controller 5 senses that the system pressure reaches the set threshold value through the electronic pressure gauge 3, and then closes the air inlet electromagnetic valve 70 of the first sampling can 4 and the sampling pump 2. Thus, the first sampling period ends, and then the sampling waiting period is entered. After the 24h waiting period ends, the air inlet electromagnetic valve 70 and the air outlet electromagnetic valve 71 on the second sampling can 4 are opened, and the above process is repeated to pressurize the second sampling can 4. This cycle continues until all the sampling cans 4 are sampled. Then, the sampling pump 2 is closed, and the switch valve 6 is opened, and the entire sampling process ends. At this time, the staff takes away all the sampling cans 4 from the sampling site, and takes the collected air samples back for further testing and analysis.
[0029] It can be understood that "multiple" in the present disclosure refers to two or more, and other quantifiers are similar. The association relationship between the associated objects is described, which means that there can be three relationships, for example, A and / or B, which can represent three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after are in an "or" relationship. The singular forms "a", "said" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.
[0030] It can be further understood that the terms "first", "second", and the like are used to describe various information, but these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not represent a specific order or importance. In fact, the expressions "first", "second", and the like can be completely interchangeable. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.
[0031] It should be further understood that the terms "center", "longitudinal", "transverse", "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships as shown in the drawings, and are used only for the purpose of facilitating the description of the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and be used or be constructed and operated in a particular orientation.
[0032] It should be further understood that, unless otherwise specified, "connection" includes direct connection between the two, and also includes indirect connection between the two through other elements.
[0033] It should be further understood that, although the operations in the embodiments of the present disclosure are described in a particular order in the drawings, it should not be understood as requiring the operations to be performed in the particular order or in a serial order, or requiring all of the operations to be performed to obtain the desired result. In a particular environment, multi-tasking and parallel processing can be advantageous.
[0034] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.
[0035] The above description is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. An ambient air halogenated greenhouse gas automated pressurized sampling system, characterized in that: It includes a sample inlet pipe (1), a sampling pump (2), an electronic pressure gauge (3), a plurality of sampling tanks (4), a programmable logic controller (5) and a switch valve (6); the sampling pump (2) and the switch valve (6) are respectively arranged at both ends of the sample inlet pipe (1), the sampling pump (2) is used for sucking ambient air into the sample inlet pipe (1) and pressing the ambient air into the sampling tank (4); a plurality of valve assemblies (7) are arranged on the sample inlet pipe (1) between the sampling pump (2) and the switch valve (6); the valve assembly (7) comprises an air inlet electromagnetic valve (70) and an air outlet electromagnetic valve (71); the air inlet electromagnetic valve (70) is communicated with the sample inlet pipe (1); the sampling tank (4) is respectively provided with an air inlet (40) and an air outlet (41); the air inlet (40) is connected with the air inlet electromagnetic valve (70), and the air outlet (41) is connected with the air outlet electromagnetic valve (71); the electronic pressure gauge (3) is arranged on the sample inlet pipe (1) between the sampling pump (2) and the switch valve (6) and is used for collecting the pressure of the gas in the sample inlet pipe (1); the programmable logic controller (5) is electrically connected with the sampling pump (2), the electronic pressure gauge (3), the air inlet electromagnetic valve (70), the air outlet electromagnetic valve (71) and the switch valve (6).
2. An automatic pressurized sampling system for ambient air halogenated greenhouse gases as claimed in claim 1, characterized in that: A safety valve (8) is arranged on the sample inlet pipe (1) of the air inlet end of the switch valve (6); the safety valve (8) is electrically connected with the programmable logic controller (5), and when the pressure of the gas in the sample inlet pipe (1) is greater than a threshold value, the safety valve (8) is opened to discharge the gas.
3. An automatic pressurized sampling system for ambient air halogenated greenhouse gases as claimed in claim 1, wherein: A filter (9) is arranged on the air inlet end of the sample inlet pipe (1); the material of the filter (9) is stainless steel which is inertly treated by silanization on the inner surface, and the filter hole is 5 μm.
4. An automatic pressurized sampling system for ambient air halogenated greenhouse gases as claimed in claim 1, wherein: The material of the sample inlet pipe (1) is stainless steel which is inertly treated by silanization on the inner surface, and the inner diameter of the sample inlet pipe (1) is 6 mm.
5. An automatic pressurized sampling system for ambient air halogenated greenhouse gases as claimed in claim 1, wherein: The sampling pump (2) is an inert oil-free diaphragm pump.
6. An automatic pressurized sampling system for ambient air halogenated greenhouse gases as claimed in claim 1, wherein: The sampling tank (4) is a Suma tank.
7. An automatic pressurized sampling system for ambient air halogenated greenhouse gases as claimed in claim 1, wherein: The model of the programmable logic controller (5) is Siemens S7-200 SMART.