Portable greenhouse gas detection device

Abstract

The utility model relates to the technical field of gas measuring instruments, and provides a portable greenhouse gas detection device which comprises a monitoring host and a sampling probe which are fixedly connected through a flange. A condensation module, a flow control module, a gas analysis module, an oxygen sensor, a main control module and a signal control module are arranged in the monitoring host, the sampling probe is connected with the condensation module, and the condensation module is sequentially connected with the flow control module, the gas analysis module and the oxygen sensor; the condensation module, the flow control module and the oxygen sensor are all connected with the signal control module, and the signal control module and the gas analysis module are both connected with the main control module. The integrated design is adopted, sampling, filtering, condensation water removal and gas analysis are integrated, the functions are highly integrated, and tedious pipeline connection is avoided; the instrument is small in size, light in weight and more convenient to use, and the lithium battery is arranged in the instrument, so that external field use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of gas measuring instruments, in particular to a portable greenhouse gas detection device. Background Art

[0002] In the prior art, the concentration of greenhouse gases is mainly measured by cavity ring-down spectroscopy, off-axis integrating cavity technology, gas chromatography, and non-dispersive infrared technology.

[0003] Among them, gas analyzers based on non-dispersive infrared technology are easily affected by various factors during use, such as temperature, gas line pressure fluctuations, water vapor content in the gas, etc., resulting in poor stability of the device during the measurement process and low measurement accuracy; however, gas analyzers based on non-dispersive infrared technology are relatively inexpensive and suitable for large-scale grid deployment. Therefore, it is necessary to improve the existing greenhouse gas measurement instruments based on non-dispersive infrared to overcome the obvious defects therein. Utility Model Content

[0004] In order to solve the above problems, the utility model provides the following technical solutions:

[0005] The utility model provides a portable greenhouse gas detection device, comprising a monitoring host and a sampling probe, wherein the monitoring host and the sampling probe are fixedly connected via a flange; a condensation module, a flow control module, a gas analysis module, an oxygen sensor, a main control module and a signal control module are arranged in the monitoring host, the sampling probe is connected to the condensation module, the condensation module is connected to the flow control module, the gas analysis module and the oxygen sensor in sequence, the condensation module, the flow control module and the oxygen sensor are all connected to the signal control module, and the signal control module and the gas analysis module are all connected to the main control module.

[0006] Preferably, the main control module is used to complete functions such as data acquisition, process control, parameter configuration, human-computer interaction, and external communication; the signal control module is used to realize the collection and processing of analog signals such as temperature and pressure, and perform actions such as vacuuming, heating, condensing, and drainage according to the instructions of the main control module.

[0007] Preferably, a protective cover is also provided at the connection between the monitoring host and the sampling probe, so that the user can carry or support the connection in the hand without getting burned.

[0008] Furthermore, the condensation module is used to condense and dehydrate the high-humidity gas, and the condensation module includes a condenser, and the drain port of the condenser is connected to a peristaltic pump to discharge the condensed water through the peristaltic pump;

[0009] The condensation module includes a heat dissipation module, which is arranged outside the detection host and includes a fan, a radiator, a heat dissipation cover and a heat sink.

[0010] The condenser includes a condensation shell, an acrylic cover and a glass cold chamber, wherein the glass cold chamber is used to reduce the gas temperature to below the dew point temperature to achieve condensation and dehydration; the glass cold chamber is installed in the condensation shell, and the outer part of the condensation shell is covered with an acrylic cover, and the acrylic cover is supported by a support column. The heat dissipation cover and the heat sink are connected with screws; silicone thermal grease is applied to both sides of the TEC, and the heat dissipation cover and the condensation shell are connected with screws; foam glue is filled inside the acrylic cover for heat insulation, and a fan is installed.

[0011] Furthermore, the flow control module is used to realize sampling flow control, and the flow control module includes a buffer tank, an air pump and a flow sensor. The air inlet of the flow sensor is connected to the air outlet of the condenser, the air outlet of the flow sensor is connected to the air inlet of the buffer tank, and the air outlet of the buffer tank is connected to the air inlet of the air pump.

[0012] Furthermore, the air outlet of the flow sensor is also connected to a pressure sensor, and the pressure value measured by the pressure sensor is the basis for air tightness function detection and judging pipeline blockage.

[0013] Furthermore, the gas analysis module is used to detect and analyze gas concentration, and the gas analysis module includes an infrared gas analysis platform. The infrared gas analysis platform adopts non-dispersive infrared technology to measure both CO2 and CO gases simultaneously.

[0014] Furthermore, a phosphoric acid titration connector is provided on the monitoring host, the air inlet of the phosphoric acid titration connector is connected to the sampling probe, and the air outlet of the phosphoric acid titration connector is connected to the air inlet of the condenser to drip phosphoric acid into the gas path to reduce the adsorption loss of SO2 during condensation and water removal.

[0015] Furthermore, the sampling probe includes a probe shell, a ventilation tube and a heating rod, wherein the ventilation tube and the heating rod are placed in the probe shell; the heating rod is placed closely on the outer surface of the ventilation tube, and the ventilation tube and the heating rod are wrapped in layers with thermal insulation cotton.

[0016] Furthermore, a scale is provided on the probe housing.

[0017] Furthermore, the sampling probe also includes an air nozzle and a filter element. A placement hole is provided at one end of the probe shell, the air nozzle is placed in the placement hole, the filter element is sleeved on the ventilation pipe, and a first elastic member is connected between the air nozzle and the filter element.

[0018] Furthermore, the monitoring host also includes a display screen, and the display screen has an embedded main control module for completing functions such as data acquisition, process control, parameter configuration, human-computer interaction, and external communication, wherein the main control module is conventional software in the prior art, and is used to realize functions such as data acquisition, process control, parameter configuration, human-computer interaction, and external communication.

[0019] Preferably, the monitoring host is also provided with a ΔP± connector, which is connected to the monitoring host via a Pitot tube probe to measure the flue gas flow rate and the flue gas temperature respectively. When the flue gas flow rate and the flue gas temperature need to be measured, the ΔP± connector is also connected to the differential pressure sensor to calculate the flue gas flow rate, and the Pitot tube probe is equipped with a temperature sensor to obtain the sensor signal through the ΔP± connector to calculate the flue gas temperature and the flue gas flow rate.

[0020] The monitoring host is provided with a power module, which includes a lithium battery and a power board. The monitoring host is also provided with a power switch, a power interface, and a ΔP± connector. The power board is connected to the signal control board, the power switch, the power interface, the working condition interface and the lithium battery.

[0021] Preferably, a U-shaped rack is provided on the top of the monitoring host for placing the power module.

[0022] Preferably, the monitoring host is provided with a first handle and a second handle, which are respectively placed on the top of the monitoring host and the side of the detection host; the power interface and the second handle are arranged on the same side of the detection host, and the power interface is used to charge the lithium battery.

[0023] A supporting base is also provided at the bottom of the detection host.

[0024] The bottom of the detection host is also provided with an exhaust hole and a drain hole.

[0025] The entire gas circuit connection relationship of the device is:

[0026] The sampling probe is connected to the air inlet of the phosphoric acid titration joint, the air outlet of the phosphoric acid titration joint is connected to the air inlet of the condenser, or the sampling probe is directly connected to the condenser, the drain outlet of the condenser is connected to one end of the peristaltic pump, the other end of the peristaltic pump is connected to the drain hole, the air outlet of the condenser is connected to the air inlet of the flow sensor, the air outlet of the flow sensor is connected to the air inlet of the slow air tank, the air outlet of the slow air tank is connected to the air inlet of the air pump, the air outlet of the air pump is connected to the air inlet of the infrared gas analysis platform, and the air outlet of the infrared gas analysis platform is connected to the air inlet of the oxygen sensor; the air outlet of the oxygen sensor is connected to the exhaust hole; the air outlet of the flow sensor is also connected to the pressure sensor.

[0027] During operation, the power module supplies power to the electrical equipment inside the monitoring host, the air pump works, the sampling probe is inserted into the chimney to sample the flue gas, the filter element filters the particulate matter in the flue gas, and the filtered flue gas enters the condenser from the air inlet in the condenser, and the flue gas is condensed and dehydrated through the condenser. The flue gas after condensation and dehydration enters the flow sensor, slow air tank, air pump and infrared gas analysis platform in turn to measure the CO2 and CO concentrations in the gas, and finally the O2 concentration is measured by the oxygen sensor. In addition, the flow rate and temperature of the flue gas can be measured according to needs, and the greenhouse gas emissions can be calculated by the main control module.

[0028] The utility model has the following beneficial effects:

[0029] (1) The utility model adopts an integrated design that integrates sampling, filtration, condensation and water removal, and gas analysis. The functions are highly integrated and there is no complicated pipeline connection. It is small in size and light in weight, which makes it more convenient to use. In addition, the instrument has a built-in lithium battery, which makes it more convenient to use in the field.

[0030] (2) The utility model controls the flow stability by providing a slow air tank, a flow sensor and an air pump with adjustable speed, thereby improving the stability and measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0032] Figure 2 It is a module schematic diagram of the utility model.

[0033] Figure 3 It is a layout diagram of the internal structure of the monitoring host in the utility model.

[0034] Figure 4 It is a schematic diagram of the local structure of the sampling probe in the utility model, which is far away from the monitoring host side.

[0035] Figure 5 It is a schematic diagram of the local structure of the sampling probe tube in the utility model close to the monitoring host side.

[0036] Figure 6 It is a schematic diagram of gas circuit connection in the utility model. DETAILED DESCRIPTION

[0037] The specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. It should be pointed out that the embodiments are only specific explanations of the utility model and should not be regarded as limitations of the utility model. The purpose of the embodiments is to enable those skilled in the art to better understand and reproduce the technical solutions of the utility model. The protection scope of the utility model shall still be based on the scope defined in the claims.

[0038] like Figure 1-3 As shown, the utility model provides a portable greenhouse gas detection device, including a monitoring host 1 and a sampling probe 2, the monitoring host 1 and the sampling probe 2 are fixedly connected by a flange; the monitoring host 1 is provided with a condensation module 3, a flow control module 4, a gas analysis module 5, an oxygen sensor 7, a main control module 8 and a signal control module 9, the sampling probe 2 is connected to the condensation module 3, the condensation module 3 is connected to the flow control module 4, the gas analysis module 5 and the oxygen sensor 7 in sequence, the condensation module 3, the flow control module 4 and the oxygen sensor 7 are all connected to the signal control module 9, and the signal control module 9 and the gas analysis module 5 are all connected to the main control module 8.

[0039] Preferably, the main control module 8 is used to complete functions such as data acquisition, process control, parameter configuration, human-computer interaction, and external communication; the signal control module 9 is used to realize the collection and processing of analog signals such as temperature and pressure, and perform actions such as vacuuming, heating, condensing, and drainage according to the instructions of the main control module 8.

[0040] Preferably, a protective cover 20 is further provided at the connection between the monitoring host 1 and the sampling probe 2, so that the user can carry or hold the monitoring host 1 or the sampling probe 2 in the hand without getting burned.

[0041] In some preferred embodiments, the condensation module 3 is used to condense and dehydrate the high-humidity gas. The condensation module 3 includes a condenser 31. The drain port of the condenser 31 is connected to a peristaltic pump 32, and the condensed water is discharged through the peristaltic pump 32.

[0042] The condensation module 3 includes a heat dissipation module 33 , which is disposed outside the detection host 1 . The heat dissipation module 33 includes a fan, a radiator, a heat dissipation cover and a heat sink.

[0043] The condenser includes a condensation shell, an acrylic cover and a glass cold chamber, wherein the glass cold chamber is used to reduce the gas temperature to below the dew point temperature to achieve condensation and dehydration; the glass cold chamber is installed in the condensation shell, the outer part of the condensation shell is covered with an acrylic cover, and the acrylic cover is supported by a support column. The heat dissipation cover is connected with the heat dissipation cover by screws; silicone thermal grease is applied to both sides of the TEC, and the heat dissipation cover and the condensation shell are connected with screws; foam glue is filled inside the acrylic cover for heat insulation, and a fan is installed.

[0044] In some preferred schemes, the flow control module 4 is used to realize sampling flow control, and the flow control module 4 includes a buffer tank 41, an air pump 42 and a flow sensor 43. The air inlet of the flow sensor 43 is connected to the air outlet of the condenser 31, and the air outlet of the flow sensor 43 is connected to the air inlet of the buffer tank 41. The air outlet of the buffer tank 41 is also connected to the air inlet of the air pump 42.

[0045] In some preferred embodiments, the air outlet of the flow sensor 43 is also connected to the pressure sensor 40, and the pressure value measured by the pressure sensor is the basis for airtightness function detection and judging pipeline blockage.

[0046] In some preferred embodiments, the gas analysis module 5 is used to detect and analyze gas concentration, and the gas analysis module includes an infrared gas analysis platform 51, which uses non-dispersive infrared technology to simultaneously measure CO2 and CO. The infrared gas analysis platform 51 is a CO2 / CO two-in-one sensor.

[0047] In some preferred embodiments, a phosphate titration joint 61 is further provided on the monitoring host, the air inlet of the phosphate titration joint 61 is connected to the sampling probe 2, the air outlet of the phosphate titration joint 61 is connected to the air inlet of the condenser 31, and the phosphate titration joint 61 is arranged on the gas path between the sampling probe 2 and the condenser 31, and phosphoric acid is dripped into the gas path to reduce the adsorption loss of SO2 during condensation and water removal.

[0048] like Figure 4 As shown, the sampling probe 2 includes a probe housing 21, a vent pipe 22 and a heating rod 23, wherein the vent pipe 22 and the heating rod 23 are placed in the probe housing 21; the heating rod 23 is placed closely on the outer surface of the vent pipe 22, and the vent pipe 22 and the heating rod 23 are wrapped in layers by heat insulation cotton 24.

[0049] In some preferred embodiments, a scale 211 is provided on the probe housing 21 .

[0050] like Figure 5 As shown, the sampling probe 2 also includes an air nozzle 25 and a filter element 26. A placement hole 212 is provided at one end of the probe housing 21. The air nozzle 25 is placed in the placement hole 212. The filter element 26 is sleeved on the ventilation pipe 22. A first elastic member 27 is connected between the air nozzle 25 and the filter element 26.

[0051] In some preferred schemes, the monitoring host 1 also includes a display screen 100, and the display screen 100 has an embedded main control module 8 to complete functions such as data acquisition, process control, parameter configuration, human-computer interaction, and external communication, wherein the main control module 8 is conventional software in the prior art, which is used to realize functions such as data acquisition, process control, parameter configuration, human-computer interaction, and external communication.

[0052] Preferably, the monitoring host 1 is also provided with a ΔP+ connector 62 and a ΔP- connector 63 which are connected thereto via a Pitot tube probe to measure the flue gas flow rate and the flue gas temperature respectively. When the flue gas flow rate and the flue gas temperature need to be measured, the ΔP± connector is also connected to the differential pressure sensor, specifically: the ΔP+ connector is connected to the high pressure end of the differential pressure sensor, and the ΔP- connector is connected to the low pressure end of the differential pressure sensor to measure the dynamic pressure value; the high pressure end of the other differential pressure sensor is connected to the ΔP- connector, and the low pressure end is not connected to the pipe line to measure the atmospheric pressure, and the sensor measures the static pressure value; the flue gas flow rate is calculated by the differential pressure sensor, and the Pitot tube probe is equipped with a temperature sensor, and the sensor signal is obtained through the ΔP+ connector 62 and the ΔP- connector 63 to calculate the flue gas temperature and the flue gas flow rate. The specific calculation formula is:

[0053]

[0054] Among them, V s Indicates the gas flow rate of wet exhaust gas;

[0055] V a Indicates the air flow rate in the ventilation duct at normal temperature and pressure;

[0056] B a Indicates atmospheric pressure;

[0057] K p Indicates the Pitot tube correction factor;

[0058] P d Indicates exhaust dynamic pressure;

[0059] P s Indicates exhaust static pressure;

[0060] ρ s Indicates the density of wet exhaust gas;

[0061] M s Indicates the molecular weight of wet exhaust gas;

[0062] t s Indicates the exhaust gas temperature.

[0063] The monitoring host 1 is provided with a power module 10, and the power module 10 includes a lithium battery and a power board. The monitoring host is also provided with a power switch and a power interface 104. The power board is connected to the signal control board, the power switch, the power interface 104, the ΔP+ connector 62 and the ΔP- connector 63 and the lithium battery.

[0064] Preferably, a U-shaped placement rack 111 is provided on the top of the monitoring host 1 for placing the power module 10 .

[0065] Preferably, the detection host 1 is provided with a first handle 102 and a second handle 103, which are respectively placed on the top of the detection host 1 and the side of the detection host; the power interface 104 and the second handle 103 are arranged on the same side of the detection host, and the power interface is used to charge the lithium battery.

[0066] A supporting base 105 is also provided at the bottom of the detection host 1 .

[0067] The bottom of the detection host 1 is also provided with an exhaust hole and a drain hole.

[0068] like Figure 5 As shown, the entire gas circuit connection relationship of the device is:

[0069] The sampling probe 2 is connected to the air inlet of the phosphoric acid titration joint 62, the air outlet of the phosphoric acid titration joint 62 is connected to the air inlet of the condenser 31, or the sampling probe 2 is directly connected to the condenser, the drain outlet of the condenser 31 is connected to one end of the peristaltic pump 32, the other end of the peristaltic pump 32 is connected to the drain hole, the air outlet of the condenser 31 is connected to the air inlet of the flow sensor 43, the air outlet of the flow sensor 43 is connected to the air inlet of the buffer tank 41, the air outlet of the buffer tank 41 is connected to the air inlet of the air pump 42, the air outlet of the air pump 42 is connected to the air inlet of the infrared gas analysis platform 51, the air outlet of the infrared gas analysis platform 51 is connected to the air inlet of the oxygen sensor 7; the air outlet of the oxygen sensor 7 is connected to the exhaust hole; the air outlet of the flow sensor 43 is also connected to the pressure sensor 40.

[0070] During operation, the power module 10 supplies power to the electrical equipment inside the monitoring host 1, the air pump 42 works, the sampling probe 2 is inserted into the chimney to sample the flue gas, the filter element 26 filters the particulate matter in the flue gas, and the filtered flue gas enters the condenser 31 from the air inlet in the condenser, and the flue gas is condensed and dehydrated by the condenser 31. The flue gas after condensation and dehydration enters the flow sensor 43, the buffer tank 41, the air pump 42 and the infrared gas analysis platform 51 in turn to measure the CO2 and CO concentrations in the gas, and finally the O2 concentration is measured by the oxygen sensor. In addition, the flow rate and temperature of the flue gas can be measured through the working condition measurement module 6 as needed, and the greenhouse gas emissions are calculated by the main control module 8.

[0071] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0072] It should be noted that the technical features not described in detail in the present invention can be achieved by any existing technology.

Claims

1. A portable greenhouse gas detection device, characterized in that: It includes a monitoring host and a sampling probe, which are fixedly connected by a flange; a condensation module, a flow control module, a gas analysis module, an oxygen sensor, a main control module and a signal control module are arranged in the monitoring host, the sampling probe is connected to the condensation module, the condensation module is connected to the flow control module, the gas analysis module and the oxygen sensor in sequence, the condensation module, the flow control module and the oxygen sensor are all connected to the signal control module, and the signal control module and the gas analysis module are all connected to the main control module.

2. The portable greenhouse gas detection device according to claim 1, characterized in that: The condensation module comprises a condenser, and a drain port of the condenser is connected to a peristaltic pump, and condensed water is discharged through the peristaltic pump.

3. The portable greenhouse gas detection device according to claim 2, characterized in that: The flow control module includes a buffer tank, an air pump and a flow sensor. The air inlet of the flow sensor is connected to the air outlet of the condenser, the air outlet of the flow sensor is connected to the air inlet of the buffer tank, and the air outlet of the buffer tank is also connected to the air inlet of the air pump.

4. The portable greenhouse gas detection device according to claim 3, characterized in that: The air outlet of the flow sensor is also connected to the pressure sensor.

5. The portable greenhouse gas detection device according to claim 1, characterized in that: The gas analysis module includes an infrared gas analysis platform, which uses non-dispersive infrared technology to measure both CO2 and CO gases simultaneously.

6. The portable greenhouse gas detection device according to claim 2, characterized in that: The monitoring host is also provided with a phosphoric acid titration joint, the air inlet of the phosphoric acid titration joint is connected to the sampling probe, and the air outlet of the phosphoric acid titration joint is connected to the air inlet of the condenser.

7. The portable greenhouse gas detection device according to claim 1, characterized in that: The sampling probe comprises a probe shell, a vent pipe and a heating rod, wherein the vent pipe and the heating rod are placed in the probe shell; the heating rod is placed closely on the outer surface of the vent pipe, and the vent pipe and the heating rod are wrapped in layers by heat insulation cotton.

8. The portable greenhouse gas detection device according to claim 7, characterized in that: A scale is arranged on the probe shell.

9. The portable greenhouse gas detection device according to claim 7, characterized in that: The sampling probe also includes an air nozzle and a filter element. A placement hole is provided at one end of the probe shell, the air nozzle is placed in the placement hole, the filter element is sleeved on the ventilation pipe, and a first elastic member is connected between the air nozzle and the filter element.

10. The portable greenhouse gas detection device according to claim 1, characterized in that: The monitoring host also includes a display screen.

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