CN218629153U - Regional greenhouse gas sampling device of landfill - Google Patents
Regional greenhouse gas sampling device of landfill Download PDFInfo
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- CN218629153U CN218629153U CN202220650575.8U CN202220650575U CN218629153U CN 218629153 U CN218629153 U CN 218629153U CN 202220650575 U CN202220650575 U CN 202220650575U CN 218629153 U CN218629153 U CN 218629153U
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Abstract
The utility model belongs to the technical field of greenhouse gas sampling, in particular to a landfill area greenhouse gas sampling device, which comprises a controller, a static box, an external circulation pipeline and a sampling mechanism; the static box comprises a box body, two ends of an external circulation pipeline are respectively communicated with the box body, the sampling mechanism is communicated with the external circulation pipeline, and the top of the box body is provided with an air pressure balance valve; the air pressure balance valve and the sampling mechanism are respectively in control connection with the controller; under the control of the controller, the air pressure balance valve and the sampling mechanism are linked: when the sampling mechanism is in a sampling state, the air pressure balance valve is opened, and the box body is communicated with the external atmospheric environment. Therefore, the utility model discloses based on the control relation between atmospheric pressure balance method design controller, atmospheric pressure balanced valve and the sampling mechanism for sampling mechanism can communicate with external atmospheric environment when the extraction sample, prevents that the sampling gas volume from leading to static incasement outside atmospheric pressure unbalanced when great, influences the gaseous release speed of face source of static incasement.
Description
Technical Field
The utility model belongs to the technical field of greenhouse gas samples, concretely relates to regional greenhouse gas sampling device of landfill.
Background
Carbon dioxide (CO 2), nitrous oxide (N2O), methane (CH 4) and the like are main greenhouse gases in the earth atmosphere, the greenhouse effect can cause huge climate influence and environmental harm, and the worldwide effort is constantly made to reduce the greenhouse gas emission and delay or reduce the greenhouse effect. Landfill is one of the major sources of greenhouse gases emission, and static bin method is currently one of the most common methods for determining the greenhouse gas flux for CO2, CH4 and N2O in landfill areas. The existing greenhouse gas sampling static box adopts a split type design, the whole device is sealed by adopting a soil sealing and water sealing mode, and the box is suitable for sampling the soil covering surface of a landfill project. The landfill site is one of the main release sources of methane, before the landfill site is covered with soil and sealed, the surface of a landfill area is covered with a layer of HDPE film, and garbage is arranged below the HDPE film. Due to the detection of the conventional greenhouse gas emission flux, the HDPE film does not need to be damaged, and the split type static box device is not suitable for sampling of the tectorial membrane area.
Patent document CN 206671003U discloses a static soil greenhouse gas sampling box with filtering function, which is equipped with an ultraviolet sterilization device inside, and the air exhaust port is equipped with a filtering layer and activated carbon, so as to remove dust, impurities and peculiar smell of the extracted gas. The device can save the purification process to gathering gas to the later stage, nevertheless lacks the automatic sampling function.
Patent document CN 207866583U discloses an automatic sample collection device, which uses a static box as a main body and is provided with a control device, a diaphragm pump and an electromagnetic valve. The gas in the static box is pumped out to carry out external circulation, and a gas collecting device is arranged on an external circulation pipeline, so that automatic sampling can be realized. Meanwhile, the automatic sample acquisition device only measures the air temperature change in the static box, and the influence of the air pressure change on the sampling process caused by sample extraction is not considered yet.
SUMMERY OF THE UTILITY MODEL
The utility model provides a regional greenhouse gas sampling device of landfill, its first technical purpose is based on the static case structure of atmospheric pressure equilibrium design for gas sampling device can communicate with external atmospheric environment when extracting the sample, prevents that the gaseous volume of sampling from leading to static incasement outside atmospheric pressure unbalanced when great, influences the gaseous release rate of face source of static incasement. The utility model discloses a secondary technical purpose changes the substructure of static case, makes sampling device be applicable to the greenhouse gas sample detection of landfill tectorial membrane scene. The utility model discloses a third technical purpose is when the static incasement temperature of automatic monitoring, also accomplishes the monitoring and the feedback of static incasement gas pressure, provides atmospheric pressure numerical value during for follow-up static incasement data collected's analysis processes.
In order to achieve the technical purpose, the utility model adopts the following technical proposal:
a sampling device for greenhouse gas in a landfill area comprises a controller, a static tank, an external circulation pipeline and a sampling mechanism; the static box comprises a box body, two ends of an external circulation pipeline are respectively communicated with the box body, the sampling mechanism is communicated with the external circulation pipeline, and the top of the box body is provided with an air pressure balance valve; the air pressure balance valve and the sampling mechanism are respectively in control connection with the controller; under the control of the controller, the air pressure balance valve and the sampling mechanism are linked: when the sampling mechanism is in a sampling state, the air pressure balance valve is opened, and the box body is communicated with the external atmospheric environment; otherwise, the air pressure balance valve is closed, and the box body is closed from the external atmospheric environment.
Preferably, the box body is of an integrated structure, and the bottom surface of the box body is in contact with the covering film of the landfill body; and skirt edges are arranged around the bottom surface of the box body.
Preferably, a temperature and pressure sensor is mounted on the box body; the temperature and pressure sensor can monitor the temperature and the air pressure in the box body in real time and feed back the temperature and the air pressure to the controller.
Preferably, an exhaust pipe is suspended in the box body; the upper end of the exhaust pipe penetrates through the middle of the top surface of the box body, and the lower end of the exhaust pipe vertically extends towards the interior of the box body; an electric pump is arranged on the outer side of the contact part of the exhaust pipe and the box body, the inlet of the electric pump is communicated with the upper end of the exhaust pipe, and the outlet of the electric pump is communicated with the upper end of the external circulation pipeline; the electric pump is in control connection with the controller.
Preferably, the pipe wall of the external circulation pipeline is provided with a plurality of sampling ports; each sampling port is communicated with a sampling mechanism; each sampling mechanism comprises a diaphragm pump and a sampling bag; the inlet of the diaphragm pump is communicated with the sampling port, and the outlet of the diaphragm pump is communicated with the opening of the sampling bag; each diaphragm pump is connected with the controller in a control mode and is in linkage connection with the air pressure balance valves one by one under the control of the controller: when any diaphragm pump is in a working state, the air pressure balance valve is opened.
Preferably, the number of sampling ports is 5.
Preferably, the air-conditioning system further comprises a fan for stirring the air in the box body, and the fan is arranged on the inner wall of the box body.
Preferably, the air pressure balancing valve is a solenoid valve.
Preferably, the sampling device further comprises a check valve, and the check valve is mounted on a connecting pipeline between the sampling port and the diaphragm pump;
preferably, a timer is installed on a control connection circuit of the controller, the diaphragm pump, the electric pump and the fan.
Through above technical scheme, for prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses a temperature pressure sensor to be equipped with the data recorder, according to the parameter that the time interval record of setting for corresponds, can derive and send data, omit the parameter condition of record sampling process when reducing the manual operation, it is more convenient.
2. The utility model is an automatic sampling, which is more accurate in the control of sampling time, and reduces the sampling time delay caused by manual operation or the manual operation error; meanwhile, the manpower is greatly liberated.
3. The utility model discloses well air inlet and diaphragm pump relevance of adopting, the two is opened and close simultaneously, and the solenoid valve opens when sampling promptly, and the solenoid valve is closed when the sampling finishes. The electromagnetic valve is opened to balance the air pressure in the box body, so that the air pressure in the box body is reduced in the sample extraction process, the release rate of greenhouse gases in the box body is accelerated, and the influence on test data is caused; moreover, the two sampling automatic association controls, and the situation that the electromagnetic valve is forgotten to be opened during manual operation is avoided.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples.
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a block diagram of the start/stop control system of each valve and pump of the present invention.
In the figure: 1. a box body; 2. a fan; 3. an air exhaust pipe; 4. an air inlet; 5. an electromagnetic valve; 6. a temperature pressure sensor; 7. an electric pump; 8. an external circulation pipe; 9. a diaphragm pump; 9-1, a first diaphragm pump; 9-2, a second diaphragm pump; 9-3, a third diaphragm pump; 9-4, a fourth diaphragm pump; 9-5, a fifth diaphragm pump; 10. sampling bags; 11. a controller; 12. a fan timer; 13-1, a first timer; 13-2, a second timer; 13-3, a third timer; 13-4, a fourth timer; 13-5, a fifth timer; 14. a skirt edge.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, "first", "second", etc. do not represent the importance of the parts and should not be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the protection scope of the present invention.
Because of the detection of conventional greenhouse gas emission flux, need not to destroy the HDPE membrane, split type static case equipment is not suitable for the sampling in tectorial membrane region, therefore, this embodiment provides a preferred embodiment, a landfill regional greenhouse gas sampling device, is applicable to the greenhouse gas detection in landfill tectorial membrane scene. As shown in fig. 1, the sampling device comprises a box body 1, a skirt 14, a fan 2, an exhaust tube 3, an electric pump 7, an air inlet 4, a temperature and pressure sensor 6, an external circulation pipeline 8 and a plurality of sampling mechanisms, wherein:
the box body 1 is of an integrated structure, and the bottom surface of the box body 1 is in contact with the covering film of the landfill body. The skirt edges 14 are arranged along the periphery of the bottom surface of the box body 1, so that the contact area between the sampling device and the covering film of the landfill stack body is increased. Preferably, the skirt 14 and the film contact surface are adhered by a transparent wide tape to ensure that no gas leaks into the interior of the case 1.
The fan 2 is arranged on the inner wall of the box body 1, and the fan 2 is used for gas in the box body 1 to ensure that the gas in the box body 1 is uniformly mixed.
The air exhaust pipe 3 vertically extends from the middle of the top surface of the box body 1 to the inside of the box body 1, the bottom of the air exhaust pipe 3 is close to the bottom surface of the box body 1 but is not contacted with the bottom surface of the box body 1, and a plurality of air exhaust holes are formed in the pipe wall of the air exhaust pipe 3. Further, the electric pump 7 is arranged at the contact position of the exhaust pipe 3 and the box body 1, one end of the electric pump 7 is connected with the exhaust pipe 3, and the other end of the electric pump is connected with one end of the external circulation pipeline 8. The arrangement of the plurality of the air extraction holes ensures that the air in the box body 1 extracted by the electric pump 7 is more representative; preferably, the electric pump 7 contains a flow meter.
The outer circulation pipeline 8 extends to the position below the side wall of the box body 1 from the external environment at the top of the box body 1, and the other end of the outer circulation pipeline 8 is connected with the side wall of the box body 1. Further, a plurality of sampling ports are arranged on the pipe wall of the outer circulation pipeline 8 as required, at least 5 or more sampling ports are arranged according to the principle of calculating greenhouse gas emission flux by a gradient method, the more sampling numbers are, the more sample data are, the more points of a curve can be used for fitting, and the more accurate the slope of curve fitting is.
Further, the housing 1 is opened with the air inlet 4, and preferably, an electromagnetic valve 5 is provided at the air inlet 4. The electromagnetic valve 5 can control the opening and closing of the air inlet 4, when the air inlet 4 is opened, the air inlet is directly communicated with the outside atmosphere, and the electromagnetic valve is mainly used for balancing the air pressure in the box body 1 when a sample is collected. The electromagnetic valve 5 can select a two-way valve, that is, the gas inside and outside the box body 1 can be communicated, or select a one-way valve, that is, only the external gas is allowed to enter the box body 1, and the gas inside the box body 1 is not allowed to leak.
Above-mentioned sampling mechanism includes diaphragm pump 9 and sampling bag 15, diaphragm pump 9 set up in sampling mouth department, sampling bag 15 set up in diaphragm pump 9 keeps away from one side of extrinsic cycle pipeline 8. And a check valve is arranged on one side of the diaphragm pump, which is far away from the external circulation pipeline.
Specifically, when the diaphragm pump 9 is started, the gas in the external circulation pipeline 8 is pumped into the sampling bag 15, so that one-time sampling is completed, and the specific sampling volume can be determined according to the laboratory detection limit requirement. After the diaphragm pump 9 is closed, the gas in the sampling bag 15 cannot flow back to the external circulation pipeline 8 due to the action of the check valve. In order to balance the air pressure in the box body 1, each diaphragm pump 9 is individually associated with the electromagnetic valve 5, and the electromagnetic valve 5 needs to be synchronously opened and closed with the diaphragm pump 9 as long as one diaphragm pump 9 is opened and closed.
The temperature and pressure sensor 6 is arranged on the box body 1, and part of the temperature and pressure sensor 6 extends into the box body 1; for detecting the temperature and pressure inside the tank 1 in real time. Unlike other static tank devices, the sampling device introduces pressure parameters for the conversion of the effects of pressure changes in greenhouse gas emission flux calculations.
Further, the present embodiment further includes a controller 11, and the controller 11 is connected to and controls the fan 2, the electromagnetic valve 5, the temperature and pressure sensor 6, the electric pump 7, and the plurality of diaphragm pumps 9, respectively. Preferably, the number of the sampling ports, the diaphragm pumps 9, the check valves and the sampling bags 15 is equal to the number of sampling times.
Example 1
As shown in fig. 2, 5 diaphragm pumps 9 and 5 sampling bags 10 are provided, which are respectively a first diaphragm pump 9-1, a second diaphragm pump 9-2, a third diaphragm pump 9-3, a fourth diaphragm pump 9-4, a fifth diaphragm pump 9-5, a first sampling bag, a second sampling bag, a third sampling bag, a fourth sampling bag and a fifth sampling bag. The sampling device further comprises a power supply 10, a fan timer 12, a first timer 13-1, a second timer 13-2, a third timer 13-3, a fourth timer 13-4 and a fifth timer 13-5, wherein:
the power supply 10 is rechargeable, and the power supply 10 supplies power to the controller 11. The controller 11 controls the fan 2, the electric pump 7, the first diaphragm pump 9-1, the second diaphragm pump 9-2, the third diaphragm pump 9-3, the fourth diaphragm pump 9-4, and the fifth diaphragm pump 9-5, and the fan 2 and the electric pump 7 are always kept in an open state.
The first diaphragm pump 9-1 is connected with the first sampling bag, the second diaphragm pump 9-2 is connected with the second sampling bag, the third diaphragm pump 9-3 is connected with the third sampling bag, the fourth diaphragm pump 9-4 is connected with the fourth sampling bag, and the fifth diaphragm pump 9-5 is connected with the fifth sampling bag.
The sampling interval duration is set in advance, and the embodiment sets that gas sampling is carried out once every 5 min. Namely, the fan timer 12, the first timer 13-1, the second timer 13-2, the third timer 13-3, the fourth timer 13-4, and the fifth timer 13-5 start to count at the same time, and then perform gas sampling at corresponding time intervals, respectively.
When the preparation work of the box body 1 is finished, all the timers start to count time. When the timing of the first timer 13-1 reaches 5min, feeding back information to the controller 11, the controller 11 sending a command to control the first diaphragm pump 9-1 to start, and simultaneously opening the electromagnetic valve 5 until the first sampling bag is completely collected, and the controller 11 controlling the first diaphragm pump 9-1 and the electromagnetic valve 5 to close simultaneously; when the second timer 13-2 times for 10min, feeding back information to the controller 11, the controller 11 sending an instruction to control the second diaphragm pump 9-2 to start, and simultaneously opening the electromagnetic valve 5 until the second sampling bag is completely collected, and the controller 11 controlling the second diaphragm pump 9-2 and the electromagnetic valve 5 to close simultaneously; when the third timer 13-3 times for 15min, feeding back information to the controller 11, the controller 11 sending an instruction to control the third diaphragm pump 9-3 to start, and simultaneously opening the electromagnetic valve 5 until the third sampling bag is completely collected, and the controller 11 controlling the third diaphragm pump 9-3 and the electromagnetic valve 5 to be closed simultaneously; when the timing of the fourth timer 13-4 reaches 20min, feeding back information to the controller 11, the controller 11 sending a command to control the fourth diaphragm pump 9-4 to start, and simultaneously opening the electromagnetic valve 5 until the fourth sampling bag finishes collecting, and the controller 11 controlling the fourth diaphragm pump 9-4 and the electromagnetic valve 5 to close simultaneously; when the timing of the fifth timer 13-5 reaches 25min, feeding back information to the controller 11, the controller 11 sending a command to control the fifth diaphragm pump 9-5 to start, and simultaneously opening the electromagnetic valve 5 until the fifth sampling bag finishes collecting, and the controller 11 controlling the fifth diaphragm pump 9-5 and the electromagnetic valve 5 to close simultaneously; at the end of the sampling, the fan 2, the electric pump 7 and the power supply 10 are switched off.
Furthermore, the temperature and pressure sensor 6 is provided with a data real-time recorder, records the temperature and pressure in the box body 1 at corresponding time according to a set corresponding time interval, and can be exported through a USB interface after sampling is finished or sent to the cloud through a Bluetooth device arranged on the temperature and pressure sensor.
Furthermore, the visual control interface is arranged at the top of the box body 1, the opening and closing time of each valve can be set according to experimental requirements, and personalized sample collection frequency is realized through reasonable opening and closing of different valves, so that different requirements of a sampler are met.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" as used herein is intended to include both the individual components or both.
The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the description, and must be determined according to the scope of the claims.
Claims (10)
1. A sampling device for greenhouse gas in a landfill area comprises a controller, a static tank, an external circulation pipeline and a sampling mechanism; static case include the box, extrinsic cycle pipeline's both ends communicate with the box respectively, sampling mechanism and extrinsic cycle pipeline intercommunication, its characterized in that: the top of the box body is provided with an air pressure balance valve; the air pressure balance valve and the sampling mechanism are respectively in control connection with the controller;
under the control of the controller, the air pressure balance valve and the sampling mechanism are linked: when the sampling mechanism is in a sampling state, the air pressure balance valve is opened, and the box body is communicated with the external atmospheric environment; otherwise, the air pressure balance valve is closed, and the box body is cut off from the external atmospheric environment.
2. The landfill area greenhouse gas sampling apparatus of claim 1, wherein: the box body is of an integrated structure, and the bottom surface of the box body is in contact with the covering film of the landfill body; and skirt borders are arranged around the bottom surface of the box body.
3. The landfill area greenhouse gas sampling device of claim 1 or 2, wherein: a temperature pressure sensor is arranged on the box body; the temperature and pressure sensor can monitor the temperature and the air pressure in the box body in real time and feed back the temperature and the air pressure to the controller.
4. The landfill area greenhouse gas sampling apparatus of claim 3, wherein: an exhaust pipe is suspended in the box body; the upper end of the exhaust pipe penetrates through the middle of the top surface of the box body, and the lower end of the exhaust pipe vertically extends towards the interior of the box body; an electric pump is arranged on the outer side of the contact part of the exhaust pipe and the box body, the inlet of the electric pump is communicated with the upper end of the exhaust pipe, and the outlet of the electric pump is communicated with the upper end of the external circulation pipeline; the electric pump is in control connection with the controller.
5. The landfill area greenhouse gas sampling apparatus of claim 4, wherein: the pipe wall of the external circulation pipeline is provided with a plurality of sampling ports; each sampling port is communicated with a sampling mechanism; each sampling mechanism comprises a diaphragm pump and a sampling bag; the inlet of the diaphragm pump is communicated with the sampling port, and the outlet of the diaphragm pump is communicated with the opening of the sampling bag;
each diaphragm pump all with controller control connection to under the control of controller, one by one with atmospheric pressure balanced valve linkage is connected: when any diaphragm pump is in a working state, the air pressure balance valve is opened.
6. The landfill area greenhouse gas sampling apparatus of claim 5, wherein: the number of the sampling ports is 5.
7. The landfill area greenhouse gas sampling apparatus of claim 5, wherein: the gas-liquid separator is characterized by further comprising a fan used for stirring the gas in the box body, wherein the fan is arranged on the inner wall of the box body and is in control connection with the controller.
8. The landfill area greenhouse gas sampling device of claim 7, wherein: the air pressure balance valve is an electromagnetic valve.
9. The landfill area greenhouse gas sampling apparatus of claim 8, wherein: the sampling device is characterized by further comprising a check valve, wherein the check valve is installed on a connecting pipeline between the sampling port and the diaphragm pump.
10. The landfill area greenhouse gas sampling device of claim 7, wherein: and timers are arranged on the controller and control connection circuits of the diaphragm pump, the electric pump and the fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202220650575.8U CN218629153U (en) | 2022-03-23 | 2022-03-23 | Regional greenhouse gas sampling device of landfill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220650575.8U CN218629153U (en) | 2022-03-23 | 2022-03-23 | Regional greenhouse gas sampling device of landfill |
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| CN218629153U true CN218629153U (en) | 2023-03-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116380574A (en) * | 2023-06-06 | 2023-07-04 | 四川发展环境科学技术研究院有限公司 | Greenhouse gas collection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116380574A (en) * | 2023-06-06 | 2023-07-04 | 四川发展环境科学技术研究院有限公司 | Greenhouse gas collection method |
| CN116380574B (en) * | 2023-06-06 | 2023-08-18 | 四川发展环境科学技术研究院有限公司 | Greenhouse gas collection method |
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