Ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring

Abstract

The present invention discloses an ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring, comprising a sampling tower, a cooling mechanism arranged inside the sampling tower, a water removal mechanism arranged inside the sampling tower, and a sampling tube arranged at one end outside the sampling tower, one end of the sampling tube is connected with a low dew point purge gas source mechanism, the low dew point purge gas source mechanism comprises an air compressor, an electronic timing drainer, a membrane filter, a pressure regulating valve, and a pressure switch, air is introduced into the air compressor through the sampling tube, the air compressor is connected to the membrane filter through a pipeline, the membrane filter is connected to the pressure regulating valve through a pipeline, one side of the low dew point purge gas source mechanism is connected with a sample gas selection mechanism containing a semipermeable membrane through a pipeline, and one side of the sample gas selection mechanism containing a semipermeable membrane is connected with an ultra-low dew point semipermeable membrane mechanism through a pipeline. The present invention realizes the efficient water removal function conveniently and efficiently.

Description

Technical Field

[0001] The present invention relates to the field of measurement and testing technology, and in particular to an ultra-low dew point semi-permeable membrane gas sample processing system based on greenhouse gas monitoring. Background Art

[0002] In the field of greenhouse gas monitoring (such as CO2 and CH4), gas analyzers based on infrared spectroscopy are widely used due to their high accuracy and reliability. However, these analyzers are extremely sensitive to water vapor concentration and particulate matter in the sample. Water vapor absorbs infrared light, while particulate matter can clog the analyzer's sample inlet or contaminate the analysis chamber, significantly affecting the analysis results and reducing data accuracy. To ensure accurate monitoring data and comply with relevant national regulations, effective dehumidification and filtration of the sample gas is essential before analysis.

[0003] Currently, sample gas dehumidification is mainly divided into two categories: one is the technical solution combined with low-temperature cold traps, and the other is the technical solution using semi-permeable membranes.

[0004] Although cryogenic cold traps and other technical solutions can achieve lower dew point temperatures, their designs are typically based on laboratory condensers, resulting in bulky systems and slow gas replacement. Furthermore, cold traps require regular defrosting and ice removal, otherwise their normal operation will be affected. To achieve continuous sampling, two condensers are often required to operate alternately. This not only increases the complexity of the system but also raises costs. Furthermore, the additional pressure loss introduced by the dead volume of the piping when the condensers are switched alternately will affect the sample gas, further reducing the accuracy of the data.

[0005] On the other hand, while the semipermeable membrane technology solution is relatively simple, its dehumidification effect is limited, typically only drying the gas to a dew point temperature of around -45 to -30°C, corresponding to a water vapor concentration of around 376 ppm. This dehumidification level is far lower than that of a cryogenic cold trap and is clearly insufficient for greenhouse gas monitoring applications requiring ultra-low dew points (e.g., below -60°C).

[0006] The filter screen inside the filter device usually needs to be cleaned from time to time, and the disassembly and assembly of the filter screen is relatively troublesome, which increases manpower.

[0007] Therefore, it is necessary to provide an ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring, which can achieve a simple and efficient effect. Summary of the Invention

[0008] The object of the present invention is to provide an ultra-low dew point semi-permeable membrane gas sample processing system based on greenhouse gas monitoring to solve the problems raised in the above background technology.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: an ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring, comprising a sampling tower, a cooling mechanism arranged inside the sampling tower, a water removal mechanism arranged inside the sampling tower, and a sampling tube arranged at one end outside the sampling tower, one end of the sampling tube is connected to a low dew point purge air source mechanism, the low dew point purge air source mechanism includes an air compressor, an electronic timer drainer, a membrane filter, a pressure regulating valve, and a pressure switch, air is introduced into the air compressor through the sampling tube, the air compressor is connected to the membrane filter through a pipeline, the membrane filter is connected to the pressure regulating valve through a pipeline, the electronic timer drainer is arranged at a location prone to water accumulation in the system, and the pressure switch is connected to the control circuit of the air compressor for monitoring the pressure state of the system;

[0010] One side of the low dew point purge gas source mechanism is connected to a sample gas selection mechanism containing a semipermeable membrane through a pipeline. The sample gas selection mechanism containing a semipermeable membrane includes a multi-way gas selection valve, a first semipermeable membrane tube with selectable length, a mass flow controller, a control board, a pipe joint and a power supply. The multi-way gas selection valve is connected to the first semipermeable membrane tube, and the other end of the first semipermeable membrane tube is connected to the mass flow controller through a pipe joint. The control signal line of the mass flow controller is connected to the control board, and receives instructions from the control board to adjust the flow rate. The control board is connected to the multi-way gas selection valve through a signal line, controls the switch state of its valve port to select sample gases from different sources, and the power supply is connected to the power interface of each component through an electric wire;

[0011] One side of the sample gas selection mechanism containing a semipermeable membrane is connected to an ultra-low dew point semipermeable membrane mechanism through a pipeline. The ultra-low dew point semipermeable membrane mechanism includes a cooling source, a cooling chamber, a second semipermeable membrane tube with selectable length, a valve and a pipe joint. The cooling source is connected to the cooling chamber through a cooling pipe. The second semipermeable membrane tube is placed inside the cooling chamber. Both ends of the second semipermeable membrane tube are connected to an external sample gas source and a dry air source through a pipe joint. The valve and the pipe joint connect the various components to form a closed gas circuit.

[0012] In one embodiment, one side of the sampling tower is connected to an air inlet, a limit frame is provided inside the sampling tower, a filter frame is placed inside the limit frame, a filter screen is connected inside the filter frame, a first support frame is fixedly connected to the top inner part of the sampling tower, a first double-headed motor is fixedly connected to the bottom of the first support frame, two output ends of the first double-headed motor are fixedly connected to a first rotating shaft, one side of the first rotating shaft at one end is connected to a scraping mechanism, one side of the scraping mechanism is connected to a scraping block, the scraping block and the filter screen correspond, one side of the first rotating shaft at the other end is connected to a vibration mechanism, the vibration mechanism and the filter frame correspond, a cylinder is fixedly connected to the inner side of the sampling tower, the output end of the cylinder is connected to an adjustment mechanism, and the adjustment mechanism and the vibration mechanism correspond;

[0013] The cooling mechanism includes a cooling chamber, a baffle plate is provided on one side of the limit frame, and the baffle plate is fixedly connected to the interior of the sampling tower, a circular groove is opened in the middle of the baffle plate, a circular tube is connected to the circular groove, and the circular tube leads to the interior of the cooling chamber, and a circulation mechanism is provided on the periphery of the cooling chamber;

[0014] The dewatering mechanism includes a dewatering chamber, which is connected to the cooling chamber. A second double-headed motor is fixedly connected to the inner side of the top of the dewatering chamber. Both output ends of the second double-headed motor are fixedly connected to a second rotating shaft. One side of the second rotating shaft is connected to a lifting mechanism. One side of the lifting mechanism at one end is connected to an opening and closing door, and one side of the lifting mechanism at the other end is connected to a heating block. An activated carbon block is placed inside the dewatering mechanism, and the heating block corresponds to the activated carbon block.

[0015] In one embodiment, the scraping mechanism includes a first bevel gear, the first bevel gear and the first rotating shaft are fixedly connected, one side of the first bevel gear is meshedly connected to the second bevel gear, one side of the second bevel gear is fixedly connected to a cross bar, one side of the cross bar is fixedly connected to a first rocking arm, one side of the first rocking arm is rotatably connected to the second rocking arm, a concave block is fixedly connected to the inner side of the sampling tower, a slider is slidably connected to the inside of the concave block, the slider and the second rocking arm are rotatably connected, a long groove is provided at the bottom of the concave block, the slider and the scraping block are fixedly connected, and the scraping block passes through the long groove;

[0016] The vibration mechanism includes a first gear, the first gear and the first rotating shaft are fixedly connected, one side of the first gear is meshed with the second gear, one side of the second gear is fixedly connected to a short rod, one side of the short rod is fixedly connected to a parallel block, the outer side of the parallel block corresponds to a round block, the round block corresponds to the adjustment mechanism, the bottom of the concave block is fixedly connected to a vertical rod, the bottom of the vertical rod is fixedly connected to a circular ring, a moving rod is provided inside the circular ring, one end of the moving rod corresponds to the round block, and the other end corresponds to the filter frame;

[0017] The adjustment mechanism includes a piston rod, which is connected to the output end of the cylinder. An L-shaped rod is fixedly connected to one side of the piston rod. The L-shaped rod and the parallel block are fixedly connected. A fourth support frame is fixedly connected to the inner side of the sampling tower, and a long groove is opened at the bottom of the fourth support frame, and the round block and the long groove correspond to each other.

[0018] The circulation mechanism includes a liquid inlet pipe and a liquid outlet pipe. A liquid storage chamber is placed on one side of the bottom of the sampling tower. The liquid inlet pipe and the liquid outlet pipe are both connected to the liquid storage chamber. An interlayer is provided on the periphery of the cooling chamber. Cooling liquid is placed inside the interlayer. The interlayer is connected to the liquid inlet pipe and the liquid outlet pipe.

[0019] The lifting mechanism includes two moving blocks, which are connected to the second rotating shaft. Four limit blocks are fixedly connected to the inner side of the top of the dewatering chamber. The four limit blocks are divided into two groups, which are respectively attached to the two sides of the two moving blocks. A bending block is fixedly connected to one side of the moving block at one end, and the bending block and the heating block are fixedly connected. A slanted block is fixedly connected to one side of the moving block at the other end, and the slanted block is fixedly connected to the opening and closing door.

[0020] In one embodiment, a second support frame is fixedly connected to the inner side of the sampling tower, and the second support frame and the cross bar are rotatably connected;

[0021] The interior of the sampling tower is fixedly connected to a third support frame, and the third support frame and the short rod are rotatably connected;

[0022] The second gear is a wide gear;

[0023] A parallel groove is provided in the middle of the circular block, and the parallel block is slidably connected inside the parallel groove;

[0024] A second spring is sleeved on the outer side of the moving rod, and a sliding block is provided on the end of the second spring close to the round block, and the sliding block and the moving rod are fixedly connected;

[0025] The outer sides of the two second rotating shafts are both provided with threads, and the directions of the two threads are opposite. The movable block and the second rotating shaft are threadedly connected. A square groove is provided at the top groove of the dewatering chamber. A square block is fixedly connected to the bottom of the opening and closing door, and the square block corresponds to the square groove. A through groove is provided on the side of the top groove of the dewatering chamber, and the through groove corresponds to the oblique block.

[0026] In one embodiment, first springs are fixedly connected to the four corners of the two surfaces of the filter frame, the first spring and the inner side of the limit frame are fixedly connected, a telescopic rod is provided inside the first spring, and the telescopic rod and the filter frame and the limit frame are all fixedly connected.

[0027] In one embodiment, a first hollow groove is provided at the bottom of the limit frame, and a second hollow groove is provided at the bottom of the sampling tower, which is consistent in size and position with the first hollow groove. A double L-shaped frame is fixedly connected to the bottom of the sampling tower, and a collection groove is slidably connected inside the double L-shaped frame.

[0028] In one embodiment, the lengths of the first semipermeable membrane tube and the second semipermeable membrane tube may be selected from 30 cm, 60 cm, 1.2 m, 1.8 m, 2.4 m and 3.6 m to meet the requirements of different drying degrees.

[0029] In one embodiment, the ultra-low dew point semi-permeable membrane mechanism is provided with a mounting panel, the second semi-permeable membrane tube is mounted on the mounting panel, and a 3 cm thick aluminum silicate fiber insulation layer is applied on the outside.

[0030] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0031] 1. The present invention is provided with a low dew point purge gas source mechanism, a sample gas selection mechanism containing a semipermeable membrane, and an ultra-low dew point semipermeable membrane mechanism, which facilitates rapid gas replacement and rapid response, achieving low dew point and low water vapor concentration of the treated gas, and is suitable for water removal treatment before high-precision room temperature gas monitoring. The technical method has a simple structure and does not require the arrangement of complex control circuits, which helps to improve the maintenance efficiency of the water removal system and is economical and practical.

[0032] 2. The present invention is equipped with a scraping and vibrating mechanism to scrape off particles adhering to the filter surface and vibrate the filter at the same time, further improving the effect of removing particles. The vibration mechanism is combined with an adjustment mechanism, and the vibration intensity can be adjusted using the inclined plane principle, which can further improve the cleaning effect. Using a double-headed motor to simultaneously drive the scraping and vibration movements saves equipment and saves costs.

[0033] 3. The present invention is provided with a lifting mechanism, which uses two opposite threads to achieve the raising of the opening and closing door and the lowering of the heating block. The hot steam inside the activated carbon block brought out by the heating block can leave the equipment through the opening and closing door, thereby accelerating the drying effect and maintaining the adsorption effect of the activated carbon block. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0035] In the attached figure:

[0036] Figure 1 It is a schematic diagram of the low dew point purge gas source mechanism, the sample gas selection mechanism containing a semipermeable membrane, and the ultra-low dew point semipermeable membrane mechanism of the present invention;

[0037] Figure 2 is a schematic diagram of a semipermeable membrane tube of the present invention;

[0038] Figure 3 It is a three-dimensional schematic diagram of the sampling tower of the present invention;

[0039] Figure 4 It is a schematic diagram of the interior of the sampling tower of the present invention;

[0040] Figure 5 It is a three-dimensional schematic diagram of the scraping, vibrating and adjusting mechanism of the present invention;

[0041] Figure 6 It is a partial three-dimensional schematic diagram of the scraping, vibrating and adjusting mechanism of the present invention;

[0042] Figure 7It is a partial three-dimensional schematic diagram of the vibration and adjustment mechanism of the present invention;

[0043] Figure 8 It is a three-dimensional schematic diagram of the local limiting frame, cooling chamber and water removal chamber of the sampling tower of the present invention;

[0044] Figure 9 It is a side perspective schematic diagram of the dewatering chamber of the present invention;

[0045] Figure 10 It is a three-dimensional schematic diagram of the lifting mechanism of the present invention;

[0046] Figure 11 It is a schematic perspective view of the top of the dewatering chamber of the present invention;

[0047] In the figure: 1. Sampling tower; 101. Air inlet; 102. Vertical rod; 103. Sampling tube; 104. Double L-shaped frame; 105. Collection tank; 106. Limiting frame; 107. Filter frame; 108. First spring; 109. Second support frame; 110. First support frame; 111. Third support frame; 112. Fourth support frame; 113. Concave block; 114. Long slot; 115. Blocking plate; 116. Cooling chamber; 117. Liquid inlet pipe; 118. Water removal chamber; 119. Liquid storage chamber; 120. Square slot; 121. Through slot; 122. First hollow slot;

[0048] 2. First double-headed motor; 201. First rotating shaft; 202. First bevel gear; 203. Second bevel gear; 204. Crossbar; 205. First rocker; 206. Second rocker; 207. Slider; 208. Scraper; 209. First gear;

[0049] 3. Cylinder; 301. Piston rod; 302. L-shaped rod; 303. Parallel block; 304. Round block; 305. Short rod; 306. Second gear; 307. Moving rod;

[0050] 4. Second double-headed motor; 401. Second rotating shaft; 402. Moving block; 403. Limiting block; 404. Bending block; 405. Heating block; 406. Inclined block; 407. Opening and closing door;

[0051] 5. Low dew point purge air source mechanism; 501. Air compressor; 502. Membrane filter; 503. Pressure regulating valve;

[0052] 6. Sample gas selection mechanism with semipermeable membrane; 601. Multi-way gas selection valve; 602. First semipermeable membrane tube; 603. Mass flow controller;

[0053] 7. Ultra-low dew point semipermeable membrane mechanism; 701. Refrigeration chamber; 702. Second semipermeable membrane tube. DETAILED DESCRIPTION

[0054] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0055] See also Figure 1-11 The present invention provides a technical solution: an ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring, comprising a sampling tower 1, a cooling mechanism arranged inside the sampling tower 1, a water removal mechanism arranged inside the sampling tower 1, and a sampling tube 103 arranged at one end outside the sampling tower 1, one end of the sampling tube 103 is connected to a low dew point purge air source mechanism 5, the low dew point purge air source mechanism 5 includes an air compressor 501, an electronic timer drainer, a membrane filter 502, a pressure regulating valve 503, and a pressure switch, air is introduced into the air compressor 501 through the sampling tube 103, the air compressor 501 is connected to the membrane filter 502 through a pipeline, the membrane filter 502 is connected to the pressure regulating valve 503 through a pipeline, the electronic timer drainer is arranged at a water-prone part of the system, and the pressure switch is connected to the control circuit of the air compressor 501 for monitoring the pressure state of the system;

[0056] One side of the low dew point purge gas source mechanism 5 is connected to a sample gas selection mechanism 6 containing a semipermeable membrane through a pipeline. The sample gas selection mechanism 6 containing a semipermeable membrane includes a multi-way gas selection valve 601, a first semipermeable membrane tube 602 of selectable length, a mass flow controller 603, a control board, a pipe joint and a power supply. The multi-way gas selection valve 601 is connected to the first semipermeable membrane tube 602, and the other end of the first semipermeable membrane tube 602 is connected to the mass flow controller 603 through a pipe joint. The control signal line of the mass flow controller 603 is connected to the control board, which receives instructions from the control board to adjust the flow rate. The control board is connected to the multi-way gas selection valve 601 through a signal line to control the switch state of its valve port to select sample gas from different sources. The power supply is connected to the power interface of each component through an electric wire.

[0057] One side of the sample gas selection mechanism 6 containing a semipermeable membrane is connected to an ultra-low dew point semipermeable membrane mechanism 7 through a pipeline. The ultra-low dew point semipermeable membrane mechanism 7 includes a cooling source, a cooling chamber 701, a second semipermeable membrane tube 702 of selectable length, a valve and a pipe joint. The cooling source is connected to the cooling chamber 701 through a cooling pipe. The second semipermeable membrane tube 702 is placed inside the cooling chamber 701. Both ends of the second semipermeable membrane tube 702 are connected to an external sample gas source and a dry air source through a pipe joint. The valve and the pipe joint connect the various components to form a closed gas circuit.

[0058] Specifically, when staff prepare to process a gas sample, the entire system begins operation. The sample gas is first introduced into sampling tower 1, where large impurities are filtered out. The sample gas then enters the cooling mechanism, where water vapor condenses, initially removing most of the water vapor from the sample gas. The sample gas then passes through the dehydration mechanism, which completely removes the condensed water vapor through adsorption, completing the initial dehydration of the sample gas.

[0059] Next, the sample gas is introduced into the low-dew-point purge air source mechanism 5 through sampling tube 103. The air first enters the air compressor 501 through sampling tube 103, which compresses the incoming air, increasing its pressure and energy. The compressed air then passes through membrane filter 502. Due to the difference in water vapor partial pressure between the inside and outside of the membrane within membrane filter 502, water molecules diffuse from the higher partial pressure inside the membrane to the lower partial pressure outside. Dryer compressed air is obtained at the outlet of membrane filter 502. A small portion of this dry compressed air is then withdrawn for expansion and decompression, reducing its pressure. Simultaneously, due to the volume expansion, its temperature also decreases. (According to the Joule-Thomson effect, for most gases, temperature decreases as pressure decreases.) During this process, water vapor in the air is further condensed and removed, forming extremely dry compressed air.

[0060] This extremely dry compressed air is introduced outside the membrane to purge any water molecules that have already diffused out, preventing them from re-entering the membrane or accumulating on the membrane surface. This increases the gradient of water distribution inside and outside the membrane, accelerating the rate of water diffusion from the inside to the outside. At the bottom of the membrane, the combined effect of these processes causes the humidity of the compressed air to drop dramatically, effectively drying the compressed air. The dew point at the air outlet can reach -60°C to -70°C.

[0061] Furthermore, electronic timed drains are installed in areas of the system prone to water accumulation, such as near filters. These drains automatically at preset intervals, effectively preventing moisture accumulation, lowering the system's dew point, and ensuring the dryness of the purge gas. A pressure switch, tightly connected to the control circuitry of air compressor 501, monitors the system's pressure in real time and adjusts the operating state of air compressor 501 to maintain stable system pressure.

[0062] The dry compressed air then enters the sample gas selection mechanism 6, which contains a semipermeable membrane. The control board controls the opening and closing of the multi-way gas selection valve 601 according to a preset program or external commands, selecting sample gases from different sources to enter the first semipermeable membrane tube 602. The semipermeable membrane tube is divided into two layers, an inner layer and an outer layer, by a hollow fiber membrane (purchased pre-made, with various commercial brands and models and varying materials. Our product uses the fluorinated polymer resin "Flemion™" developed by AGC Asahi Glass of Japan, a hydrophilic fluorinated ion exchange membrane, model TSF-01-36). This membrane has the property of equalizing the humidity difference (vapor pressure difference) between the air (gas) inside and outside the membrane, causing water vapor to migrate from the higher humidity side to the lower humidity side. The sample gas passes through the hollow fiber membrane in the first semipermeable membrane tube 602 for initial drying, with water vapor migrating from the higher humidity side to the lower humidity side, achieving initial dehumidification. After initial drying, the dew point of the sample gas drops below -20°C.

[0063] After preliminary drying, the sample gas then enters the inner side of the second semipermeable membrane tube 702 in the ultra-low dew point semipermeable membrane mechanism 7. Simultaneously, air dried to a dew point of -60°C to -70°C, provided by a low dew point purge gas source, is passed outside the second semipermeable membrane tube 702. The cooling source provides cooling to the refrigeration chamber 701 through a refrigeration pipeline, maintaining the temperature of the refrigeration chamber 701 between -13°C and -24°C. Within the refrigeration chamber 701, the sample gas moves through the thin film of the second semipermeable membrane tube 702 from the moist inner side to the dry outer side, achieving deep dehumidification. After drying, the dew point of the sample gas drops below -45°C (water vapor concentration below 0.006%). Depending on the length of the semipermeable membrane tube and the refrigeration temperature of the refrigeration chamber 701, the dew point of the dried sample gas can be adjusted between -45°C and -65°C.

[0064] Throughout the entire process, valves and pipe joints connect the various components to form a closed gas circuit, ensuring that the sample gas will not leak or be contaminated by the outside during the drying process. The control panel not only controls the working status of the multi-way gas selection valve 601 and the mass flow controller 603, but also collects signals from other sensors in the gas circuit, and displays and monitors them, so that users can understand the operating status and dehumidification effect of the system in real time, and adjust parameters or perform maintenance in a timely manner. The system uses a multi-stage dehumidification mechanism, including preliminary dehumidification by the cooling mechanism, adsorption dehumidification by the water removal mechanism, deep dehumidification by the low dew point purge gas source mechanism 5, and final deep dehumidification by the ultra-low dew point semi-permeable membrane mechanism 7. It can efficiently remove water vapor from the sample gas, so that the sample gas reaches an extremely low dew point, meeting the strict requirements of greenhouse gas monitoring for sample gas dryness. The initial filter removes large particles, ensuring that impurities do not enter the equipment, thereby extending the life of the equipment.

[0065] One side of the sampling tower 1 is connected to an air inlet 101, a limit frame 106 is provided inside the sampling tower 1, a filter frame 107 is placed inside the limit frame 106, a filter screen is connected inside the filter frame 107, a first support frame 110 is fixedly connected to the top of the sampling tower 1, a first double-headed motor 2 is fixedly connected to the bottom of the first support frame 110, both output ends of the first double-headed motor 2 are fixedly connected to a first rotating shaft 201, one side of the first rotating shaft 201 at one end is connected to a scraping mechanism, one side of the scraping mechanism is connected to a scraping block 208, the scraping block 208 corresponds to the filter screen, and one side of the first rotating shaft 201 at the other end is connected to a vibration mechanism, the vibration mechanism corresponds to the filter frame 107, the inner side of the sampling tower 1 is fixedly connected to a cylinder 3, the output end of the cylinder 3 is connected to an adjustment mechanism, and the adjustment mechanism corresponds to the vibration mechanism;

[0066] The cooling mechanism includes a cooling chamber 116. A baffle plate 115 is provided on one side of the limiting frame 106, and the baffle plate 115 is fixedly connected to the interior of the sampling tower 1. A circular groove is opened in the middle of the baffle plate 115, and a circular tube is connected to the circular groove. The circular tube leads to the interior of the cooling chamber 116. A circulation mechanism is provided on the periphery of the cooling chamber 116.

[0067] The dewatering mechanism includes a dewatering chamber 118, which is connected to the cooling chamber 116. A second double-headed motor 4 is fixedly connected to the inner side of the top of the dewatering chamber 118. Both output ends of the second double-headed motor 4 are fixedly connected to a second rotating shaft 401. One side of the second rotating shaft 401 is connected to a lifting mechanism. One side of the lifting mechanism at one end is connected to an opening and closing door 407, and one side of the lifting mechanism at the other end is connected to a heating block 405. An activated carbon block is placed inside the dewatering mechanism, and the heating block 405 corresponds to the activated carbon block.

[0068] Specifically, the gas enters the interior of the sampling tower 1 through the air inlet 101. The gas first passes through the filter frame 107 placed in the limit frame 106, and the filter screen in the filter frame 107 performs preliminary filtration on the gas to remove large particles of impurities. The first double-headed motor 2 fixed on the first support frame 110 is started, driving the two first rotating shafts 201 to rotate. The first rotating shaft 201 at one end drives the scraping mechanism to operate, and the scraping block 208 on the scraping mechanism contacts the filter screen, regularly scraping off the dust and impurities accumulated on the filter screen to maintain the filtering efficiency. The first rotating shaft 201 at the other end drives the vibration mechanism to operate, and the vibration mechanism vibrates the filter frame 107, further promoting the shedding of impurities on the filter screen. The vibration mechanism and the scraping mechanism are driven by a double-headed motor, which saves costs. At the same time, the output end of the cylinder 3 fine-tunes the vibration mechanism through an adjustment mechanism to adjust the magnitude of the vibration force to meet different cleaning requirements. The filtered gas enters the cooling chamber 116 through the circular groove and circular tube in the middle of the baffle 115. The circulation mechanism (such as a cooling water circulation system) outside the cooling chamber 116 cools the cooling chamber 116, so that the gas in the cooling chamber 116 is cooled, and its temperature and humidity are reduced. The cooled gas enters the dehydration chamber 118. The activated carbon block adsorbs the condensed water vapor and outputs dry gas. After adsorption for a period of time, the adsorption capacity of the activated carbon block decreases and it becomes relatively humid. At this time, the staff controls the second double-headed motor 4 at the top of the dehydration chamber 118 to start and drive the two second rotating shafts 401 to rotate. The second rotating shaft 401 at one end drives the lifting mechanism to operate, and the lifting mechanism controls the opening and closing door 407 to rise and open. The second rotating shaft 401 at the other end drives the heating block 405 to descend to one side of the activated carbon block. The heating block 405 blows hot air to heat the activated carbon block. At this time, the opening and closing door 407 is open, so that the blown water vapor can pass through the top exhaust device to speed up the drying efficiency. When adsorbing water vapor, the opening and closing door 407 is closed, and the heating block 405 is just stuck on the top of the cooling chamber 116, that is, the entire cooling chamber 116 is sealed to ensure the purity of the sample gas. By providing a scraping mechanism and a vibration mechanism, the filter is regularly cleaned by the drive of a double-headed motor. The scraping block 208 scrapes away dust and impurities on the filter, and the vibration mechanism promotes the shedding of impurities. The two work together to effectively improve the filtration efficiency, extend the service life of the filter, and reduce maintenance costs. The driving mode of the first double-headed motor 2 not only saves costs, but also reduces energy consumption. The adjustment mechanism can adjust the intensity of the vibration to meet different cleaning needs.

[0069] The scraping mechanism includes a first bevel gear 202, the first bevel gear 202 and the first rotating shaft 201 are fixedly connected, one side of the first bevel gear 202 is meshedly connected to the second bevel gear 203, one side of the second bevel gear 203 is fixedly connected to a cross bar 204, one side of the cross bar 204 is fixedly connected to a first rocking arm 205, one side of the first rocking arm 205 is rotatably connected to a second rocking arm 206, a concave block 113 is fixedly connected to the inner side of the sampling tower 1, a slider 207 is slidably connected to the inside of the concave block 113, the slider 207 and the second rocking arm 206 are rotatably connected, a long groove 114 is provided at the bottom of the concave block 113, the slider 207 and the scraping block 208 are fixedly connected, and the scraping block 208 passes through the long groove 114;

[0070] The vibration mechanism includes a first gear 209, which is fixedly connected to the first rotating shaft 201. One side of the first gear 209 is meshed with a second gear 306, and one side of the second gear 306 is fixedly connected to a short rod 305. One side of the short rod 305 is fixedly connected to a parallel block 303. A circular block 304 corresponds to the outer side of the parallel block 303. The circular block 304 corresponds to the adjustment mechanism. The bottom of the concave block 113 is fixedly connected to the vertical rod 102. The bottom of the vertical rod 102 is fixedly connected to a circular ring. A moving rod 307 is provided inside the circular ring. One end of the moving rod 307 corresponds to the circular block 304, and the other end corresponds to the filter frame 107.

[0071] The adjustment mechanism includes a piston rod 301, which is connected to the output end of the cylinder 3. An L-shaped rod 302 is fixedly connected to one side of the piston rod 301. The L-shaped rod 302 and the parallel block 303 are rotatably connected. The inner side of the sampling tower 1 is fixedly connected to the fourth support frame 112, and the bottom of the fourth support frame 112 is provided with a long groove, and the round block 304 corresponds to the long groove;

[0072] The circulation mechanism includes a liquid inlet pipe 117 and a liquid outlet pipe. A liquid storage chamber 119 is placed on one side of the bottom of the sampling tower 1. The liquid inlet pipe 117 and the liquid outlet pipe are both connected to the liquid storage chamber 119. An interlayer is provided on the periphery of the cooling chamber 116. Cooling liquid is placed inside the interlayer. The interlayer is connected to the liquid inlet pipe 117 and the liquid outlet pipe.

[0073] The lifting mechanism includes two moving blocks 402, which are connected to the second rotating shaft 401. Four limit blocks 403 are fixedly connected to the inner side of the top of the dewatering chamber 118. The four limit blocks 403 are divided into two groups, which are respectively attached to the two sides of the two moving blocks 402. A bending block 404 is fixedly connected to one side of the moving block 402 at one end, and the bending block 404 and the heating block 405 are fixedly connected. A slanted block 406 is fixedly connected to one side of the moving block 402 at the other end, and the slanted block 406 is fixedly connected to the opening and closing door 407.

[0074] Specifically, first, a staff member uses a controller to turn on the first double-headed motor 2, causing the first rotating shaft 201 to begin rotating. The rotation of the first rotating shaft 201 drives the fixedly connected first bevel gear 202 to rotate, and the first bevel gear 202 meshes with the second bevel gear 203, causing the second bevel gear 203 to rotate accordingly. The rotation of the second bevel gear 203 is transmitted to the first rocker 205 via the crossbar 204. The first rocker 205 is connected to the second rocker 206 via a rotational connection, forming a connecting rod mechanism. The second rocker 206 thus swings back and forth. The swinging of the second rocker 206 drives the slider 207 to slide inside the concave block 113 through the rotational connection. The slider 207 is fixedly connected to the scraper block 208, so the scraper block 208 also moves back and forth with the slider 207 within the elongated slot 114, completing the scraping operation of the filter screen.

[0075] The rotation of the first rotating shaft 201 also drives the fixedly connected first gear 209 to rotate. The first gear 209 meshes with the second gear 306, causing the second gear 306 to rotate. The second gear 306 drives the parallel block 303 to rotate via the short rod 305, and the circular block 304 outside the parallel block 303 also rotates accordingly. During the rotation process, the circular block 304 comes into periodic contact with one end of the movable rod 307, pressing against the movable rod 307 and then moving away from it. Since the other end of the movable rod 307 corresponds to the filter frame 107, this periodic contact causes the other end of the movable rod 307 to collide with the filter frame 107, helping to improve filtration efficiency.

[0076] When cylinder 3 is activated, piston rod 301, acting at its output end, begins to extend and retract. The extension and retraction of piston rod 301 is transmitted to parallel block 303 via L-shaped rod 302, causing parallel block 303 to move horizontally. The connection between parallel block 303 and circular block 304 is a ramp-like sliding connection. Importantly, circular block 304 is constrained horizontally and cannot move horizontally with parallel block 303. Therefore, when parallel block 303 moves, circular block 304 moves upward or downward accordingly due to the ramp principle. Specifically, this ramp connection can be considered a simple mechanical conversion device. When parallel block 303 moves rightward (assuming forward movement), the ramp pushes circular block 304 upward; conversely, when parallel block 303 moves leftward, the ramp pulls circular block 304 downward. The rotation of circular block 304 is centered around short rod 305. When the circular block 304 moves upward, the distance between its center of circle and the center of the short rod 305 increases, meaning that the circular block 304 is no longer located directly in the middle of the short rod 305. Thus, when the short rod 305 drives the circular block 304 to rotate, the circular block 304 acts like a cam, and its rotation has a certain amplitude. This amplitude of rotation is directly proportional to the distance between the center of circle of the circular block 304 and the center of the short rod 305. The greater the distance, the greater the amplitude of rotation. Therefore, by adjusting the movement distance of the parallel block 303, the vertical movement distance of the circular block 304 can be controlled, and thus the amplitude of its rotation. Ultimately, the rotating circular block 304 will periodically impact the filter frame 107. The degree of impact (i.e., the force and frequency of the impact) depends on the rotation amplitude of the circular block 304. The greater the rotation amplitude, the greater the degree of impact, and thus the deeper the cleaning effect on the filter frame 107.

[0077] The coolant in the liquid storage chamber 119 enters the interlayer of the cooling chamber 116 through the liquid inlet pipe 117, absorbs heat and returns to the liquid storage chamber 119 through the liquid outlet pipe, forming a coolant circulation, which helps maintain the low temperature environment of the cooling chamber 116.

[0078] The staff member turns on the second double-ended motor 4, rotating the second rotating shaft 401. The rotation of the second rotating shaft 401 drives the two movable blocks 402 to move in opposite directions within the constraints of the stop block 403. One end controls the opening and closing door 407 to rise and open, while the other end controls the heating block 405 to descend and heat the activated carbon block. The water vapor blown out by the hot air is allowed to flow out of the device through the opening and closing door 407, improving heating efficiency. The device is equipped with multifunctional integrated operations such as scraping, vibration, adjustment, cooling, and lifting to maintain the continuous effectiveness of the internal filter and activated carbon blocks, eliminating the need for manual cleaning and saving manpower.

[0079] The inner side of the sampling tower 1 is fixedly connected to a second support frame 109, and the second support frame 109 and the cross bar 204 are rotatably connected;

[0080] The interior of the sampling tower 1 is fixedly connected to a third support frame 111, and the third support frame 111 and the short rod 305 are rotatably connected;

[0081] The second gear 306 is a wide gear;

[0082] A parallel groove is formed in the middle of the round block 304, and the parallel block 303 is slidably connected inside the parallel groove;

[0083] A second spring is sleeved on the outer side of the moving rod 307, and a sliding block is provided on the end of the second spring close to the round block 304. The sliding block and the moving rod 307 are fixedly connected;

[0084] The outer sides of the two second rotating shafts 401 are both provided with threads, and the directions of the two threads are opposite. The moving block 402 and the second rotating shaft 401 are threadedly connected. A square groove 120 is provided at the top groove of the dewatering chamber 118. A square block is fixedly connected to the bottom of the opening and closing door 407, and the square block corresponds to the square groove 120. A through groove 121 is provided on the side of the top groove of the dewatering chamber 118, and the through groove 121 corresponds to the inclined block 406.

[0085] Specifically, the second support frame 109 provides a certain amount of support for the crossbar 204 while allowing it to rotate. The third support frame 111 is similar, providing a certain amount of support for the short rod 305, allowing it to rotate without affecting its left and right movement. The second gear 306 is a gear of a certain length. Under the design, the second gear 306 can move with the movement of the parallel block 303 without affecting the meshing between the gears. The parallel groove is also beveled, matching the shape of the parallel block 303. A second spring is installed on the outside of the moving rod 307. One end of the second spring is fixedly connected to the ring, and the other end is fixedly connected to the sliding block. In this way, when the moving rod 307 moves, the sliding block also moves, pressing the second spring. At this time, when the moving rod 307 collides with the filter frame 107, after the collision, the larger area of ​​the circular block 304 rotates in the opposite direction. At this time, it no longer compresses the moving rod 307, and the second spring has a rebound force, causing the moving rod 307 to return to its original position, thus achieving reciprocating collision.

[0086] The threads on the two second rotating shafts 401 are in opposite directions, while the rotation directions of the two second rotating shafts 401 are the same. Therefore, when rotating, because the movable block 402 is threadedly connected, the movable block 402 should move with the rotation. However, the limit blocks 403 on both sides limit the rotation of the movable block 402, so the movable block 402 can only move, and the two movable blocks 402 move in opposite directions. The square block at the bottom of the opening and closing door 407 just fits the square groove 120. The square groove 120 is to facilitate the discharge of heated gas. The square block is to ensure the sealing when closed. The through groove 121 is to facilitate the movement of the inclined block 406. Although the through groove 121 is opened on the side, the heating block 405 is against the opening part inside the dewatering chamber 118, that is, the part where the heating block 405 is raised and lowered, and the whole is still sealed.

[0087] The first springs 108 are fixedly connected to the four corners of the two surfaces of the filter frame 107. The first springs 108 and the inner side of the limit frame 106 are fixedly connected. A telescopic rod is provided inside the first spring 108, and the telescopic rod and the filter frame 107 and the limit frame 106 are all fixedly connected.

[0088] Specifically, the telescopic rod is used to limit the filter frame 107 to this position with a certain supporting force, and the first spring 108 allows the vibration mechanism to vibrate when vibrating, and there will be elastic shaking, and the range of shaking will not be large, which will not affect the scraping movement.

[0089] A first hollow groove 122 is provided at the bottom of the limiting frame 106, and a second hollow groove is provided at the bottom of the sampling tower 1, which is consistent in size and position with the first hollow groove 122. A double L-shaped frame 104 is fixedly connected to the bottom of the sampling tower 1, and a collection groove 105 is slidably connected inside the double L-shaped frame 104.

[0090] Specifically, the particles scraped off the filter screen will pass through the first hollow groove 122 and the second hollow groove and fall into the interior of the collection groove 105. The collection groove 105 can be slid out and cleaned regularly, and then slid into the interior of the double L-shaped frame 104 to form a good seal as a whole.

[0091] The lengths of the first semipermeable membrane tube 602 and the second semipermeable membrane tube 702 can be selected from 30 cm, 60 cm, 1.2 m, 1.8 m, 2.4 m and 3.6 m to meet the requirements of different drying degrees.

[0092] Specifically, semipermeable membrane tubes of varying lengths can be selected based on specific drying requirements, throughput, system design, and cost-effectiveness. Shorter membrane tubes are suitable for small-scale or rapid response tasks, while longer membrane tubes are ideal for large-scale, high-efficiency, or demanding drying scenarios, ensuring optimal system performance and cost-effectiveness.

[0093] The ultra-low dew point semi-permeable membrane mechanism 7 is provided with a mounting panel, the second semi-permeable membrane tube 702 is mounted on the mounting panel, and a 3 cm thick aluminum silicate fiber insulation layer is applied on the outside.

[0094] Specifically, the mounting panel serves as the support structure for the ultra-low dew-point semipermeable membrane mechanism 7, securing and supporting the second semipermeable membrane tube 702. The second semipermeable membrane tube 702 is mounted on the mounting panel and securely fastened to the panel via bolts. A 3cm thick aluminum silicate fiber insulation layer is applied to the outside of the second semipermeable membrane tube 702 to reduce heat loss and improve the system's energy efficiency. The aluminum silicate fiber insulation layer offers excellent thermal insulation properties, effectively blocking both heat conduction and heat radiation.

[0095] Working Principle: When the system is started, the sample gas first enters through the air inlet 101 of the sampling tower 1 and is initially filtered through the filter screen in the filter frame 107 to remove large particles of impurities. After the filter screen has been used for a period of time, the operator can drive the first double-headed motor 2 to complete the operation of the scraping mechanism and the vibration mechanism. The scraping mechanism drives the scraping block 208 to move back and forth through a connecting rod mechanism, scraping dust and impurities from the filter screen. The vibration mechanism uses the periodic rotation of the circular block 304 to impact the filter frame 107, promoting the removal of impurities. The cylinder 3 adjusts the vibration intensity through an adjustment mechanism to meet different cleaning needs.

[0096] The filtered sample gas enters cooling chamber 116. A circulation mechanism surrounding cooling chamber 116 maintains a low temperature by circulating coolant, cooling the sample gas. The sample gas then enters dehumidification chamber 118, where the activated carbon block absorbs the condensed water vapor. When the activated carbon block's adsorption capacity decreases, the second double-headed motor 4 is activated, controlling the opening and closing door 407 via the lifting mechanism. The heating block 405 descends to heat and regenerate the activated carbon block, and the blown-out water vapor is discharged through the top exhaust device.

[0097] After preliminary dehydration, the sample gas passes through sampling tube 103 and enters the low-dew-point purge air source mechanism 5. After compression by air compressor 501, filtration by membrane filter 502, and drainage by the electronic timer, the resulting compressed air is extremely dry. This compressed air is used to purge water molecules from the outside of the membrane, preventing them from re-entering the membrane or accumulating on the membrane surface.

[0098] Next, the sample gas enters the semipermeable membrane-containing sample gas selection mechanism 6 for preliminary drying, and then passes through the ultra-low dew point semipermeable membrane mechanism 7 for deep dehumidification. In the refrigeration chamber 701, the sample gas passes through the thin film of the second semipermeable membrane tube 702 for deep dehumidification. After drying, the dew point of the sample gas can be reduced to below -45°C. The dew point range can be adjusted as needed to ultimately obtain a suitable sample gas.

[0099] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or interconnected connections; they can refer to direct connections, internal connectivity between two components, or an interaction between two components. A person of ordinary skill in the art will be able to understand the meaning of the above terms in this application based on the specific circumstances.

[0100] The above is a detailed introduction to the ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An ultra-low dew point semi-permeable membrane gas sample processing system based on greenhouse gas monitoring, comprising a sampling tower (1), a cooling mechanism arranged inside the sampling tower (1), a water removal mechanism arranged inside the sampling tower (1), and a sampling tube (103) arranged at one end outside the sampling tower (1), characterized in that: One end of the sampling tube (103) is connected to a low dew point purge air source mechanism (5), which comprises an air compressor (501), an electronic timer drainer, a membrane filter (502), a pressure regulating valve (503), and a pressure switch. Air is introduced into the air compressor (501) through the sampling tube (103), the air compressor (501) is connected to the membrane filter (502) through a pipeline, the membrane filter (502) is connected to the pressure regulating valve (503) through a pipeline, the electronic timer drainer is arranged at a part of the system that is prone to water accumulation, and the pressure switch is connected to the control circuit of the air compressor (501) to monitor the pressure state of the system; One side of the low dew point purge gas source mechanism (5) is connected to a sample gas selection mechanism (6) containing a semipermeable membrane via a pipeline. The sample gas selection mechanism (6) containing a semipermeable membrane comprises a multi-way gas selection valve (601), a first semipermeable membrane tube (602) of selectable length, a mass flow controller (603), a control board, and a pipeline joint. The multi-way gas selection valve (601) is connected to the first semipermeable membrane tube (602). The other end of the first semipermeable membrane tube (602) is connected to the mass flow controller (603) via a pipeline joint. A control signal line of the mass flow controller (603) is connected to the control board to receive instructions from the control board to adjust the flow rate. The control board is connected to the multi-way gas selection valve (601) via a signal line to control the switch state of its valve port. One side of the sample gas selection mechanism (6) containing a semipermeable membrane is connected to an ultra-low dew point semipermeable membrane mechanism (7) via a pipeline. The ultra-low dew point semipermeable membrane mechanism (7) comprises a refrigeration source, a refrigeration chamber (701), a second semipermeable membrane tube (702) of selectable length, and a valve. The refrigeration source is connected to the refrigeration chamber (701) via a refrigeration pipeline. The second semipermeable membrane tube (702) is placed inside the refrigeration chamber (701). The inner side of the second semipermeable membrane tube (702) is connected to an external sample gas source. The outer side of the second semipermeable membrane tube (702) is connected to a dry air source. The valves are connected to both ends of the second semipermeable membrane tube (702) to achieve closure and circulation of the gas path. One side of the sampling tower (1) is connected to an air inlet (101); a limit frame (106) is provided inside the sampling tower (1); a filter frame (107) is placed inside the limit frame (106); a filter screen is connected inside the filter frame (107); a first support frame (110) is fixedly connected to the top of the sampling tower (1); a first double-headed motor (2) is fixedly connected to the bottom of the first support frame (110); both output ends of the first double-headed motor (2) are fixedly connected to a first rotating shaft (201); a scraping mechanism is connected to one side of the first rotating shaft (201) at one end; a scraping block (208) is connected to one side of the scraping mechanism; the scraping block (208) corresponds to the filter screen; a vibration mechanism is connected to one side of the first rotating shaft (201) at the other end; the vibration mechanism corresponds to the filter frame (107); a cylinder (3) is fixedly connected to the inside of the sampling tower (1); an adjustment mechanism is connected to the output end of the cylinder (3); the adjustment mechanism corresponds to the vibration mechanism; The vibration mechanism comprises a first gear (209), the first gear (209) and the first rotating shaft (201) are fixedly connected, one side of the first gear (209) is meshedly connected with a second gear (306), one side of the second gear (306) is fixedly connected with a short rod (305), one side of the short rod (305) is fixedly connected with a parallel block (303), the outer side of the parallel block (303) corresponds to a round block (304), the round block (304) corresponds to the adjustment mechanism, the bottom of the concave block (113) is fixedly connected with a vertical rod (102), the bottom of the vertical rod (102) is fixedly connected with a circular ring, a moving rod (307) is arranged inside the circular ring, one end of the moving rod (307) corresponds to the circular block (304), and the other end corresponds to the filter frame (107); The adjustment mechanism comprises a piston rod (301), the piston rod (301) is connected to the output end of the cylinder (3), an L-shaped rod (302) is fixedly connected to one side of the piston rod (301), the L-shaped rod (302) and the parallel block (303) are rotatably connected, a fourth support frame (112) is fixedly connected to the inner side of the sampling tower (1), and a long groove is provided at the bottom of the fourth support frame (112), and the round block (304) corresponds to the long groove; The cooling mechanism comprises a cooling chamber (116), a baffle plate (115) is provided on one side of the limiting frame (106), and the baffle plate (115) is fixedly connected to the inside of the sampling tower (1), a circular groove is provided in the middle of the baffle plate (115), a circular tube is connected to the circular groove, and the circular tube leads to the inside of the cooling chamber (116), and a circulation mechanism is provided on the periphery of the cooling chamber (116); The dewatering mechanism comprises a dewatering chamber (118), wherein the dewatering chamber (118) is connected to a cooling chamber (116), a second double-headed motor (4) is fixedly connected to the inner side of the top of the dewatering chamber (118), two output ends of the second double-headed motor (4) are fixedly connected to a second rotating shaft (401), the outer sides of the two second rotating shafts (401) are provided with threads, the two threads are in opposite directions, one side of the two second rotating shafts (401) is connected to a lifting mechanism, one side of the lifting mechanism at one end is connected to an opening and closing door (407), and one side of the lifting mechanism at the other end is connected to a heating block (405), and an activated carbon block is placed inside the dewatering mechanism, and the heating block (405) corresponds to the activated carbon block.

2. The ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring according to claim 1, characterized in that: The scraping mechanism comprises a first bevel gear (202), the first bevel gear (202) and the first rotating shaft (201) are fixedly connected, one side of the first bevel gear (202) is meshingly connected to the second bevel gear (203), one side of the second bevel gear (203) is fixedly connected to a crossbar (204), one side of the crossbar (204) is fixedly connected to a first rocking arm (205), one side of the first rocking arm (205) is rotatably connected to a second rocking arm (206), a concave block (113) is fixedly connected to the inner side of the sampling tower (1), a slider (207) is slidably connected to the inside of the concave block (113), the slider (207) and the second rocking arm (206) are rotatably connected, a long groove (114) is provided at the bottom of the concave block (113), the slider (207) and the scraping block (208) are fixedly connected, and the scraping block (208) passes through the long groove (114); The circulation mechanism comprises a liquid inlet pipe (117) and a liquid outlet pipe, a liquid storage chamber (119) is placed on one side of the bottom of the sampling tower (1), the liquid inlet pipe (117) and the liquid outlet pipe are both connected to the liquid storage chamber (119), an interlayer is provided on the periphery of the cooling chamber (116), a coolant is placed inside the interlayer, and the interlayer is connected to the liquid inlet pipe (117) and the liquid outlet pipe; The lifting mechanism comprises two moving blocks (402), the moving blocks (402) are connected to the second rotating shaft (401), four limit blocks (403) are fixedly connected to the inner side of the top of the dewatering chamber (118), the four limit blocks (403) are divided into two groups, and are respectively attached to the two sides of the two moving blocks (402), one side of the moving block (402) at one end is fixedly connected to a bending block (404), the bending block (404) and the heating block (405) are fixedly connected, and one side of the moving block (402) at the other end is fixedly connected to an inclined block (406), and the inclined block (406) and the opening and closing door (407) are fixedly connected.

3. The ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring according to claim 2, characterized in that: A second support frame (109) is fixedly connected to the inner side of the sampling tower (1), and the second support frame (109) and the cross bar (204) are rotatably connected; A third support frame (111) is fixedly connected inside the sampling tower (1), and the third support frame (111) and the short rod (305) are rotatably connected; The second gear (306) is a wide gear; A parallel groove is formed in the middle of the round block (304), and the parallel block (303) is slidably connected inside the parallel groove; A second spring is sleeved on the outer side of the moving rod (307), and a sliding block is provided at one end of the second spring close to the round block (304), and the sliding block and the moving rod (307) are fixedly connected; The moving block (402) and the second rotating shaft (401) are threadedly connected. A square groove (120) is provided at the top groove of the dewatering chamber (118). A square block is fixedly connected to the bottom of the opening and closing door (407). The square block and the square groove (120) correspond to each other. A through groove (121) is provided on the side of the top groove of the dewatering chamber (118). The through groove (121) and the inclined block (406) correspond to each other.

4. The ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring according to claim 2, characterized in that: The first spring (108) is fixedly connected to the four corners of the two faces of the filter frame (107); the first spring (108) and the inner side of the limit frame (106) are fixedly connected; a telescopic rod is arranged inside the first spring (108); and the telescopic rod and the filter frame (107) and the limit frame (106) are all fixedly connected.

5. The ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring according to claim 2, characterized in that: The bottom of the limiting frame (106) is provided with a first hollow groove (122), the bottom of the sampling tower (1) is provided with a second hollow groove, the second hollow groove and the first hollow groove (122) are of the same size and position, the bottom of the sampling tower (1) is fixedly connected to a double L-shaped frame (104), and the inside of the double L-shaped frame (104) is slidably connected to a collecting groove (105).

6. The ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring according to claim 1, characterized in that: The lengths of the first semipermeable membrane tube (602) and the second semipermeable membrane tube (702) are selected from 30 cm, 60 cm, 1.2 m, 1.8 m, 2.4 m and 3.6 m to meet the requirements of different drying degrees.

7. The ultra-low dew point semi-permeable membrane sample gas processing system based on greenhouse gas monitoring according to claim 1, characterized in that: The ultra-low dew point semi-permeable membrane mechanism (7) is provided with a mounting panel, the second semi-permeable membrane tube (702) is mounted on the mounting panel, and an aluminum silicate fiber insulation layer with a thickness of 3 cm is applied on the outer side.

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