Greenhouse gas emission analysis device

Abstract

The utility model relates to greenhouse gas emission analysis device, greenhouse gas emission analysis device includes: sampler, sampler includes cylinder, and the cylinder is the hollow structure of upper end closed, lower end opening, and the cylinder floats on water and the lower end of cylinder is immersed below water level, gas analyzer, the gas analyzer is connected with the upper end of cylinder between the outlet pipe and back gas pipe, and the gas analyzer is configured as receiving the greenhouse gas that cylinder collected through the outlet pipe, and back gas pipe is inhaled to the gas to the cylinder, gas exchange device, including pump body, and the pump body is connected between the outlet pipe and back gas pipe, and the pump body is configured as receiving the greenhouse gas that cylinder collected through the outlet pipe and is arranged to the outside air, and back gas pipe is pumped into the outside air to the cylinder. The utility model discloses greenhouse gas emission analysis device, simple structure, convenient connection can realize 24h unattended monitoring greenhouse gas's concentration.

Description

Technical Field

[0001] This utility model relates to the technical field of greenhouse gas detection equipment, and in particular to a greenhouse gas emission analysis device. Background Technology

[0002] The main types of greenhouse gases produced by lakes and reservoirs include carbon dioxide and methane. These gases are generated by the decomposition of organic matter in the water or from land sources by microorganisms in the water. After diffusion, transport, and consumption in the water, the carbon dioxide and methane produced are eventually released into the atmosphere through the water-air interface.

[0003] Current mainstream greenhouse gas monitoring methods include the inverted funnel method and the TDLAS method.

[0004] The inverted funnel method uses an inverted funnel connected to a gas collection device, which is placed at a certain height below the water surface to collect underwater bubbles. By analyzing the gas concentration in the gas collection device, the gas flux emitted through bubbling can be estimated.

[0005] TDLAS (Tunable Diode Laser Absorption Spectroscopy) monitoring technology: TDLAS technology utilizes the wavelength tuning characteristics of a diode laser to obtain the absorption spectrum of the gas being measured within its characteristic absorption spectral range, thereby enabling qualitative or quantitative monitoring and analysis of the gas.

[0006] Among them, TDLAS monitoring technology can only monitor greenhouse gases at a certain upper limit of concentration. When the greenhouse gas concentration in the gas continuously collected by the gas collection device exceeds the set concentration, it cannot monitor the change and the collected gas must be manually emptied and the detection must be restarted.

[0007] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model discloses a greenhouse gas emission analysis device to solve the problem that gas collection devices using the inverted funnel method and TDLAS monitoring technology cannot continuously monitor greenhouse gas concentrations.

[0009] The technical solution adopted in this utility model is as follows: A greenhouse gas emission analysis device, comprising: a sampler including a cylinder, the cylinder being a hollow structure closed at the top and open at the bottom, the cylinder floating on water with its lower end submerged below the water surface; a gas analyzer connected to the upper end of the cylinder via an outlet pipe and a return pipe, the gas analyzer being configured to receive greenhouse gases collected by the cylinder through the outlet pipe and return gas to the cylinder through the return pipe; and a ventilation device including a pump body connected between the outlet pipe and the return pipe, the pump body being configured to receive greenhouse gases collected by the cylinder through the outlet pipe and discharge them to outside air, and to pump outside air into the cylinder through the return pipe.

[0010] A further technical solution is that a T-junction is provided on the air outlet pipe and the air return pipe; an air inlet and an air outlet are provided on the pump body, the air inlet is connected to the output end of the pump body through a pipe, the air outlet is connected to the input end of the pump body through a pipe, and the air inlet and the air outlet are connected to external air; the ventilation device includes: a first air inlet pipe, the first end of which is connected to the T-junction on the air outlet pipe, and the second end of which is connected to the input end of the pump body; a second air inlet pipe, the first end of which is connected to the T-junction on the air return pipe, and the second end of which is connected to the output end of the pump body.

[0011] A further technical solution is to install one-way intake valves on the first and second intake pipes.

[0012] A further technical solution is that the greenhouse gas emission analysis device also includes a controller, the gas analyzer is equipped with a concentration detector, the pump body is equipped with a flow regulating switch, and the controller is electrically connected to the concentration detector and the flow regulating switch respectively.

[0013] A further technical solution is that a solenoid valve is also installed on the pipe between the air inlet and the second air inlet pipe, and a solenoid valve is also installed on the pipe between the air outlet and the first air inlet pipe, and the solenoid valve is electrically connected to the controller.

[0014] A further technical solution is to provide a ring of floats on the outside of the cylinder.

[0015] A further technical solution is to install a water-blocking filter on the air outlet pipe.

[0016] A further technical solution is that the gas analyzer is electrically connected to a mobile power supply, and a power switch is also provided on the pump body, which is electrically connected between the pump body and the mobile power supply.

[0017] A further technical solution is that the mobile power supply is electrically connected to the solar panel.

[0018] A further technical solution is that a fan is also installed inside the cylinder.

[0019] The beneficial effects of this utility model embodiment are as follows: (I) In the greenhouse gas emission analysis device of this utility model embodiment, when the gas analyzer detects that the concentration of the gas to be measured has reached the upper limit of detection, the pump body of the ventilation device is activated. External air enters through the air inlet, passes through the second air inlet pipe and the return air pipe sequentially into the cylinder, displacing the high concentration of greenhouse gas. The displaced high concentration of greenhouse gas then enters the pump body sequentially through the air outlet pipe and the first air inlet pipe, and is then discharged into the external air through the air outlet. When the gas analyzer detects that the concentration of the gas to be measured has reached the lower limit of detection, the pump body is shut off, and the sampler, air outlet pipe, gas analyzer, and return air pipe re-form a monitoring closed loop for greenhouse gas monitoring again. The greenhouse gas emission analysis device of this utility model has a simple structure, is easy to connect, and can achieve 24-hour unattended monitoring of greenhouse gas concentration.

[0020] (ii) Furthermore, the gas analyzer and pump body are electrically connected to a mobile power supply, which is electrically connected to a solar panel. The solar panel absorbs light energy and converts it into electrical energy to charge the mobile power supply, thereby improving the equipment's endurance, making it green and environmentally friendly, and convenient for use on water. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the greenhouse gas emission analysis device of this utility model.

[0022] Figure 2 This is a connection diagram of the greenhouse gas emission analysis device of this utility model.

[0023] In the picture: 1. Sampler; 11. Cylinder; 12. Float; 13. Fan; 2. Exhaust pipe; 21. T-connector; 22. Water-blocking filter; 3. Return pipe; 4. Gas analyzer; 41. Concentration detector; 5. Ventilation device; 51. Pump body; 511. Air inlet; 512. Air outlet; 513. Solenoid valve; 514. Power switch; 515. Flow regulating switch; 52. First air inlet pipe; 521. One-way air inlet valve; 53. Second air inlet pipe; 6. Power bank; 7. Solar panel; 8. Controller. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0025] Example: This embodiment discloses a greenhouse gas emission analysis device.

[0026] like Figure 1 As shown, the greenhouse gas emission analysis device includes a sampler 1, a gas analyzer 4, and a ventilation device 5.

[0027] The sampler 1 includes a cylindrical body 11, which is a hollow structure with a closed upper end and an open lower end. The cylindrical body 11 floats on the water and its lower end is submerged below the water surface. For example, a ring of floats 12 is provided on the outside of the cylindrical body 11.

[0028] Gas analyzer 4 is connected to the upper end of cylinder 11 via an outlet pipe 2 and a return pipe 3. Gas analyzer 4 is configured to receive greenhouse gases collected by cylinder 11 through outlet pipe 2 and return gas to cylinder 11 through return pipe 3. Specifically, the gas analyzer has its own suction pump, thus forming a gas circulation path between sampler 1, outlet pipe 2, gas analyzer 4, and return pipe 3.

[0029] The ventilation device 5 includes a pump body 51 connected between the outlet pipe 2 and the return pipe 3. The pump body 51 is configured to receive greenhouse gases collected by the cylinder 11 through the outlet pipe 2 and discharge them to the outside air, and to pump outside air into the cylinder 11 through the return pipe 3. For example, a three-way pipe 21 is provided on the outlet pipe 2 and the return pipe 3. The ventilation device 5 includes a first inlet pipe 52 and a second inlet pipe 53. The pump body 51 is provided with an air inlet 511 and an air outlet 512. The air inlet 511 is connected to the output end of the pump body 51 through a pipe, and the air outlet 512 is connected to the input end of the pump body 51 through a pipe. The air inlet 511 and the air outlet 512 are connected to the outside air. The first end of the first inlet pipe 52 is connected to the three-way pipe 21 on the outlet pipe 2, and the second end is connected to the input end of the pump body 51. The first end of the second inlet pipe 53 is connected to the three-way pipe 21 on the return pipe 3, and the second end is connected to the output end of the pump body 51.

[0030] like Figure 1 As shown, a one-way air intake valve 521 is further provided on the first air intake pipe 52 and the second air intake pipe 53. The one-way air intake valve 521 prevents gas backflow and ensures the normal operation of gas collection and analysis.

[0031] like Figure 2 As shown, the greenhouse gas emission analysis device further includes a controller 8, a concentration detector 41 installed inside the gas analyzer 4, and a flow regulating switch 515 installed on the pump body 51. The controller 8 is electrically connected to both the concentration detector 41 and the flow regulating switch 515. The controller 8 receives the detection signal from the concentration detector 41 and controls the opening of the flow regulating switch 515, thereby adjusting the gas replacement rate in the sampler 1 to ensure that the total gas volume and pressure in the cylinder 11 meet the operating conditions. The controller 8 is a commercially available PLC controller, and the control program is based on existing technology.

[0032] like Figure 2 As shown, a solenoid valve 513 is further installed on the pipe between the air inlet 511 and the second air inlet pipe 53, and a solenoid valve 513 is also installed on the pipe between the air outlet 512 and the first air inlet pipe 52. The solenoid valve 513 is electrically connected to the controller 8. The controller 8 controls the opening and closing of the solenoid valve 513 according to the detection signal of the concentration detector 41, ensuring that the air exchange device is disconnected from the air outlet pipe 2 and the return pipe 3 when it is closed, thus ensuring the closed-loop gas path of the sampler 1, the air outlet pipe 2, the gas analyzer 4 and the return pipe 3.

[0033] like Figure 1 As shown, a water-blocking filter 22 is further installed on the gas outlet pipe 2 to prevent water vapor from entering the gas analyzer 4, ensuring detection accuracy, and at the same time preventing water vapor from corroding the instrument.

[0034] like Figure 1 As shown, the gas analyzer 4 is further electrically connected to the mobile power supply 6, and a power switch 514 is also provided on the pump body 51. The power switch 514 is electrically connected between the pump body 51 and the mobile power supply 6, and the power switch 514 controls the start and stop of the pump body 51.

[0035] like Figure 1 As shown, the power bank 6 is further connected to the solar panel 7. The solar panel 7 absorbs light energy and converts it into electrical energy to charge the power bank 6, thereby improving the device's battery life, making it green and environmentally friendly, and convenient for use on water.

[0036] like Figure 1 As shown, a fan 13 is further installed inside the cylinder 11. The fan 13 agitates the gas inside the cylinder 11 at a certain speed, so that the gas collected inside the cylinder 11 is continuously and evenly mixed with the return gas from the return pipe 3. This prevents high concentrations of greenhouse gas accumulated in local areas inside the cylinder 11 from entering the gas analyzer 4 through the outlet pipe 2 and affecting the detection results, thereby improving the accuracy of the detection.

[0037] In this embodiment, when the gas analyzer 4 detects that the concentration of the gas to be measured has reached the upper limit of detection, the pump 51 of the ventilation device 5 is activated. External air enters through the air inlet 511, passes through the second air inlet pipe 53 and the return air pipe 3, and enters the cylinder 11, replacing the high concentration of greenhouse gas. The replaced high concentration of greenhouse gas then enters the pump 51 through the air outlet pipe 2 and the first air inlet pipe 52, and is discharged into the external air through the air outlet 512. When the gas analyzer 4 detects that the concentration of the gas to be measured has reached the lower limit of detection, the pump 51 is shut off. The sampler 1, air outlet pipe 2, gas analyzer 4, and return air pipe 3 re-form a monitoring closed loop, and greenhouse gas monitoring is performed again. This utility model's greenhouse gas emission analysis device has a simple structure, is easy to connect, and can achieve 24-hour unattended monitoring of greenhouse gas concentration.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A greenhouse gas emission analysis device, characterized in that, The greenhouse gas emission analysis device includes: A sampler, comprising a cylinder, the cylinder being a hollow structure closed at the top and open at the bottom, the cylinder floating on water with its lower end submerged below the water surface; A gas analyzer is provided, wherein an outlet pipe and a return pipe are connected between the gas analyzer and the upper end of the cylinder. The gas analyzer is configured to receive greenhouse gases collected by the cylinder through the outlet pipe and return gas to the cylinder through the return pipe. A ventilation device includes a pump body connected between the outlet pipe and the return pipe. The pump body is configured to receive greenhouse gases collected in the cylinder through the outlet pipe and discharge them to the outside air, and to pump outside air into the cylinder through the return pipe.

2. The greenhouse gas emission analysis device according to claim 1, characterized in that: The outlet pipe and return pipe are equipped with T-junctions; the pump body is equipped with an air inlet and an air outlet, the air inlet is connected to the output end of the pump body through a pipe, the air outlet is connected to the input end of the pump body through a pipe, and the air inlet and air outlet are connected to external air; the ventilation device includes: The first air inlet pipe has a first end connected to a three-way pipe on the air outlet pipe and a second end connected to the input end of the pump body. The second air intake pipe has a first end connected to a tee pipe on the return air pipe and a second end connected to the output end of the pump body.

3. The greenhouse gas emission analysis device according to claim 2, characterized in that: One-way air intake valves are installed on the first air intake pipe and the second air intake pipe.

4. The greenhouse gas emission analysis device according to claim 2, characterized in that: The greenhouse gas emission analysis device also includes a controller, a concentration detector is installed inside the gas analyzer, and a flow regulating switch is installed on the pump body. The controller is electrically connected to the concentration detector and the flow regulating switch respectively.

5. The greenhouse gas emission analysis device according to claim 4, characterized in that: A solenoid valve is also installed on the pipe between the air inlet and the second air inlet pipe, and a solenoid valve is also installed on the pipe between the air outlet and the first air inlet pipe. The solenoid valve is electrically connected to the controller.

6. The greenhouse gas emission analysis device according to claim 1, characterized in that: A ring of floats is set on the outside of the cylinder.

7. The greenhouse gas emission analysis device according to claim 1, characterized in that: A water-blocking filter is installed on the air outlet pipe.

8. The greenhouse gas emission analysis device according to claim 1, characterized in that: The gas analyzer is electrically connected to a portable power source, and a power switch is also provided on the pump body, which is electrically connected between the pump body and the portable power source.

9. The greenhouse gas emission analysis device according to claim 8, characterized in that: The mobile power supply is electrically connected to the solar panel.

10. The greenhouse gas emission analysis device according to claim 1, characterized in that: A fan is also installed inside the cylinder.

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