Non-point source carbon and nitrogen emission dynamic monitoring equipment

Abstract

The utility model relates to the technical field of carbon nitrogen emission monitoring, in particular to a dynamic monitoring device for non-point source carbon nitrogen emission, which comprises a supporting rod, a rotating table is rotatably connected to the top end of the supporting rod, a gas absorption tank is fixedly arranged in the middle of the rotating table, and a photoelectric detector is inserted into one end of the gas absorption tank. A tunable semiconductor laser is inserted into the other end of the gas absorption cell; compared with traditional dynamic monitoring equipment for non-point source carbon and nitrogen emission, according to the dynamic monitoring equipment for non-point source carbon and nitrogen emission, the filtering assembly is arranged at the end of the air pump according to requirements and comprises the mounting cylinder and the end cover, and air can be pumped into the mounting cylinder by starting the air pump; air is sequentially filtered through the grating net, the inner bag, the outer bag and the filter net and then conveyed into the first pipeline, the inner bag collides and rubs on the surfaces of the protruding blocks, and therefore dust accumulation on the surface of the inner bag is reduced, the stability of air circulation and filtering is improved, dust particles entering the first pipeline are reduced, pollution is reduced, and the precision of laser detection is improved.

Description

Technical Field

[0001] This utility model relates to the field of carbon and nitrogen emission monitoring technology, and in particular to a device for dynamic monitoring of area source carbon and nitrogen emissions. Background Technology

[0002] Non-point source carbon and nitrogen emission dynamic monitoring equipment is an instrument used to monitor non-point source carbon and nitrogen emissions in the environment, including the atmosphere, soil, and water bodies, in real time and continuously. Carbon and nitrogen emission monitoring can accurately measure the emissions of greenhouse gases such as carbon dioxide and methane, as well as related gases such as nitrogen oxides, helping people understand the extent to which human activities affect climate change. Carbon and nitrogen emission monitoring plays a vital role in many aspects, including addressing climate change, environmental protection, resource management, and enterprise development.

[0003] Existing dynamic monitoring equipment for area source carbon and nitrogen emissions typically employs tunable semiconductor laser absorption spectroscopy technology. This equipment usually includes a tunable semiconductor laser, a gas absorption cell, a photodetector, and a signal processing unit. By adjusting the laser wavelength to match the absorption spectrum of gases such as carbon dioxide, when the laser passes through the gas being measured, the gas absorbs the laser energy, causing a change in laser intensity. By detecting this change, the gas concentration can be accurately measured, achieving high-precision monitoring of carbon emissions.

[0004] During the use of existing non-point source carbon and nitrogen emission dynamic monitoring equipment, the air contains a large number of fine particulate impurities. When the gas is transported into the absorption tank by the air pump, the dust particles easily contaminate the tank and affect the energy of laser propagation and absorption, thus affecting the accuracy of carbon and nitrogen emission monitoring. Utility Model Content

[0005] In order to overcome the problem that existing area source carbon and nitrogen emission dynamic monitoring equipment is used because the air contains a large number of fine particulate impurities, and when the gas is transported into the absorption tank by the air pump, the dust particles can easily contaminate the tank and affect the energy of laser propagation and absorption, thus affecting the accuracy of carbon and nitrogen emission monitoring.

[0006] The technical solution of this utility model is as follows: a dynamic monitoring device for area source carbon and nitrogen emissions, including a support rod, a rotating platform rotatably connected to the top of the support rod, a gas absorption tank fixed in the middle of the rotating platform, a photodetector inserted into one end of the gas absorption tank, a tunable semiconductor laser inserted into the other end of the gas absorption tank, a second pipe inserted into the side wall of the gas absorption tank, a signal processing unit fixed on the surface of the support rod near the photodetector, an air pump fixed on the end of the support rod near the tunable semiconductor laser, a filter assembly provided at the air inlet of the air pump, the filter assembly including an installation cylinder, an end cap, a grid, a retaining ring, an inner bag, an outer bag, a filter screen, and a protrusion, the installation cylinder being threadedly connected to the air inlet of the air pump, and the end cap being threadedly connected to the other end of the installation cylinder.

[0007] Preferably, the grid mesh is fixed in the middle of the end cap, and a groove is provided on the inner side wall of the mounting cylinder for the retaining ring to engage. The internal dimensions of the groove are the same as the external dimensions of the retaining ring. The inner bag is woven on the inner side wall of the retaining ring, and the outer bag is fitted on the outer surface of the inner bag. The filter mesh is fixed on the inner side wall of the mounting cylinder, and the protrusion is woven on the inner side wall of the outer bag, which improves the stability of the retaining ring installation.

[0008] Preferably, the air pump outlet is equipped with a flexible hose connected to the second pipe, and the gas absorption tank is connected to the first pipe on the side wall away from the second pipe. Solenoid valves are installed between the first pipe and the second pipe, which improves the convenience of exhausting the first pipe.

[0009] Preferably, the photodetector and the tunable semiconductor laser are located on the same horizontal line, and both the photodetector and the tunable semiconductor laser pass through the gas absorption cell. The signal processing unit is coupled to the photodetector and the tunable semiconductor laser in sequence, which improves the stability of laser transmission.

[0010] Preferably, a pressure gauge is inserted into the top of the gas absorption tank, and the pressure gauge is coupled to the air pump.

[0011] Preferably, a servo motor is fixedly mounted on the inner top of the support rod, and the output end of the servo motor passes through the support rod and is fixed in the middle of the bottom of the rotary table. An inspection port is opened on the side wall of the support rod near the servo motor, which improves the convenience of rotating the rotary table.

[0012] The beneficial effects of this utility model are:

[0013] Compared to traditional area source carbon and nitrogen emission dynamic monitoring equipment, this device features a filter assembly at the end of the air pump, which includes an installation cylinder and an end cap. Activating the air pump draws air into the installation cylinder, where it is filtered sequentially through a grid, inner bag, outer bag, and filter before being delivered to the first duct. The inner bag rubs against the surface of the protrusions, reducing dust accumulation and improving the stability of airflow filtration. This reduces dust particles entering the first duct, thus minimizing contamination and improving the accuracy of laser detection. Furthermore, the device incorporates a retaining ring and a retaining groove. The retaining ring is circular and fits the internal dimensions of the retaining groove, enhancing the convenience and stability of the inner and outer bag installation and positioning. Attached Figure Description

[0014] Figure 1 The diagram shown is a three-dimensional structural schematic of the area source carbon and nitrogen emission dynamic monitoring device of this utility model.

[0015] Figure 2 The diagram shown is a schematic representation of the gas absorption tank structure of the area source carbon and nitrogen emission dynamic monitoring device of this utility model.

[0016] Figure 3 The diagram shown is an exploded view of the filter assembly of the area source carbon and nitrogen emission dynamic monitoring device of this utility model.

[0017] Figure 4 The diagram shown is a schematic representation of the installation cylinder structure of the area source carbon and nitrogen emission dynamic monitoring equipment of this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Support rod; 2. Rotary table; 3. Gas absorption tank; 4. Photodetector; 5. Signal processing unit; 6. First pipe; 7. Pressure gauge; 8. Second pipe; 9. Tunable semiconductor laser; 10. Air pump; 11. Filter assembly; 1101. Mounting cylinder; 1102. End cap; 1103. Grille; 1104. Snap ring; 1105. Inner bag; 1106. Outer bag; 1107. Slot; 1108. Filter screen; 1109. Protrusion; 12. Servo motor; 13. Inspection port. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Please see Figures 1-4The non-point source carbon and nitrogen emission dynamic monitoring equipment includes a support rod 1, with a rotating platform 2 rotatably connected to the top of the support rod 1. A gas absorption tank 3 is fixed in the middle of the rotating platform 2 by bolts and clamps. The gas absorption tank 3 is used to hold the air to be detected. A photodetector 4 is inserted into one end of the gas absorption tank 3. The photodetector 4 converts the light signal after passing through the gas absorption tank into an electrical signal for subsequent processing. A tunable semiconductor laser 9 is inserted into the other end of the gas absorption tank 3. The tunable semiconductor laser 9 is used to emit lasers of different wavelengths. A second pipe 8 is inserted into the side wall of the gas absorption tank 3 for air intake. A signal processing unit 5 is fixed on the surface of the support rod 1 near the photodetector 4. The signal processing unit 5 amplifies, demodulates, and filters the electrical signal output by the photodetector 4 to obtain information related to the concentration of the target gas. The photodetector 4 and the tunable semiconductor laser 9 are located on the same horizontal line and both penetrate the gas absorption tank 3. The signal processing unit 5 is connected to the photodetector 4 and the tunable semiconductor laser 9 in sequence. Phase coupling improves the stability of laser transmission. An air pump 10 is bolted to the end of the support rod 1 near the tunable semiconductor laser 9 to accelerate airflow. A filter assembly 11 is installed at the air inlet of the air pump 10. The filter assembly 11 includes a mounting cylinder 1101, an end cap 1102, a grid 1103, a retaining ring 1104, an inner bag 1105, an outer bag 1106, a filter screen 1108, and a protrusion 1109. The mounting cylinder 1101 is threaded to the air inlet of the air pump 10, and the end cap 1102 is threaded to the mounting cylinder 1101. At the other end of 1, the mounting cylinder 1101 and the end cap 1102 are both used for support and limiting. When the air pump 10 is started, air can be drawn into the mounting cylinder 1101. The air is filtered through the grid 1103, inner bag 1105, outer bag 1106 and filter 1108 in sequence and then delivered into the first pipe 6. The inner bag 1105 collides and rubs against the surface of the protrusion 1109, thereby reducing dust accumulation and improving the stability of airflow filtration. This reduces the entry of dust particles into the first pipe 6, thereby reducing pollution and improving the accuracy of laser detection.

[0021] Please see Figures 1-4A grid 1103 is fixed in the middle of the end cap 1102 to filter large particles of impurities and prevent organisms from entering the mounting cylinder 1101. A slot 1107 is provided on the inner wall of the mounting cylinder 1101 for the retaining ring 1104 to engage. The internal dimensions of the slot 1107 are the same as the external dimensions of the retaining ring 1104. An inner bag 1105 is woven on the inner wall of the retaining ring 1104, and an outer bag 1106 is fitted on the outer surface of the inner bag 1105. Both the inner bag 1105 and the outer bag 1106 are made of non-woven fabric for preliminary filtration. A filter screen 1108 is fixed on the inner wall of the mounting cylinder 1101. The mounting cylinder 1101 is made of activated carbon filter cotton with a honeycomb surface to further filter and adsorb impurities in the air. A protrusion 1109 is woven on the inner wall of the outer bag 1106 to improve the stability of the retaining ring 1104 installation.

[0022] Please see Figures 1-2 The air outlet of the air pump 10 is equipped with a flexible hose that connects to the second pipe 8. The first pipe 6 is inserted into the side wall of the gas absorption tank 3 away from the second pipe 8. Solenoid valves are installed in the middle of the first pipe 6 and the second pipe 8, which improves the convenience of exhausting the first pipe 6. A pressure gauge 7 is inserted into the top of the gas absorption tank 3 and is coupled to the air pump 10.

[0023] Please see Figures 1-2 A servo motor 12 is fixedly installed on the inner top of the support rod 1. The output end of the servo motor 12 passes through the support rod 1 and is fixed in the middle of the bottom of the rotary table 2. An inspection port 13 is opened on the side wall of the support rod 1 near the servo motor 12, which improves the convenience of rotating the rotary table 2, thereby expanding the range of air detection and facilitating dynamic monitoring.

[0024] During operation, the operator first moves the device to the designated location, fixes the support rod 1 to the area to be tested with bolts, and then connects an external power source. The mounting cylinder 1101 is threaded onto the air inlet of the air pump 10. The air outlet of the air pump 10 is connected to the second pipe 8 via a flexible hose. When carbon and nitrogen content needs to be tested, the solenoid valve between the first pipe 6 and the second pipe 8 is opened sequentially. Starting the air pump 10 draws air through the mounting cylinder 1101 into the first pipe 6. The grid mesh 1103 filters large particles of impurities in the air. The inner bag 1105 rubs against the surface of the protrusion 1109, reducing dust accumulation and preventing blockage of the inner bag 1105 and outer bag 1106, thus improving air quality. The airflow through the inner bag 1105 and outer bag 1106 improves filtration stability, thereby reducing dust particles entering the first pipe 6, thus reducing pollution and improving the accuracy of laser detection. It displaces the air inside the first pipe 6, closes the valve of the first pipe 6, and collects the air inside the first pipe 6. When the pressure gauge 7 detects that the pressure reaches the specified value, the valve between the air pump 10 and the second pipe 8 closes in sequence. The laser emitted by the tunable semiconductor laser 9 irradiates the air inside the first pipe 6, which is received by the photodetector 4 and converted into an electrical signal. The signal processing unit 5 amplifies, demodulates, and filters the electrical signal output by the photodetector 4, and finally obtains information related to the concentration of the target gas.

[0025] Through the above steps, a filter assembly 11 is provided at the end of the air pump 10 as required. The filter assembly 11 includes an installation cylinder 1101 and an end cap 1102. When the air pump 10 is started, air can be drawn into the installation cylinder 1101. The air is filtered sequentially through the grid mesh 1103, the inner bag 1105, the outer bag 1106 and the filter screen 1108 before being delivered into the first pipe 6. The inner bag 1105 collides and rubs against the surface of the protrusion 1109, thereby preventing dust accumulation on the surfaces of the inner bag 1105 and the outer bag 1106, thereby improving the stability of airflow and filtration of the inner bag 1105 and the outer bag 1106, thereby reducing the entry of dust particles into the first pipe 6, thereby reducing pollution and improving the accuracy of laser detection.

Claims

1. A dynamic monitoring device for surface source carbon and nitrogen emissions, comprising a support rod (1); characterized in that: A rotating platform (2) is rotatably connected to the top of the support rod (1). A gas absorption pool (3) is fixed in the middle of the rotating platform (2). A photodetector (4) is inserted into one end of the gas absorption pool (3), and a tunable semiconductor laser (9) is inserted into the other end of the gas absorption pool (3). A second pipe (8) is inserted into the side wall of the gas absorption pool (3). A signal processing unit (5) is fixed on the surface of the support rod (1) near the photodetector (4). An air pump (10) is fixed on the end of the support rod (1) near the tunable semiconductor laser (9). A filter assembly (11) is provided at the air inlet of the air pump (10). The filter assembly (11) includes a mounting cylinder (1101), an end cap (1102), a grid (1103), a retaining ring (1104), an inner bag (1105), and an outer bag (1106). 1106), filter screen (1108), protrusion (1109), mounting cylinder (1101) is threaded to the air inlet of air pump (10), end cap (1102) is threaded to the other end of mounting cylinder (1101), grid screen (1103) is fixed in the middle of end cap (1102), a slot (1107) is provided on the inner side wall of mounting cylinder (1101) for snap ring (1104) to snap, the internal size of slot (1107) is the same as the external size of snap ring (1104), inner bag (1105) is woven on the inner side wall of snap ring (1104), outer bag (1106) is fitted on the outer surface of inner bag (1105), filter screen (1108) is fixed on the inner side wall of mounting cylinder (1101), and protrusion (1109) is woven on the inner side wall of outer bag (1106).

2. The area source carbon and nitrogen emission dynamic monitoring device according to claim 1, characterized in that: The air outlet of the air pump (10) is equipped with a flexible hose connected to the second pipe (8). The gas absorption tank (3) is connected to the first pipe (6) on the side wall away from the second pipe (8). Solenoid valves are installed between the first pipe (6) and the second pipe (8).

3. The area source carbon and nitrogen emission dynamic monitoring device according to claim 1, characterized in that: The photodetector (4) and the tunable semiconductor laser (9) are located on the same horizontal line. Both the photodetector (4) and the tunable semiconductor laser (9) pass through the gas absorption cell (3). The signal processing unit (5) is coupled to the photodetector (4) and the tunable semiconductor laser (9) in sequence.

4. The area source carbon and nitrogen emission dynamic monitoring device according to claim 1, characterized in that: A pressure gauge (7) is inserted into the top of the gas absorption tank (3), and the pressure gauge (7) is coupled to the air pump (10).

5. The area source carbon and nitrogen emission dynamic monitoring device according to claim 1, characterized in that: A servo motor (12) is fixedly installed on the inner top of the support rod (1). The output end of the servo motor (12) passes through the support rod (1) and is fixed in the middle of the bottom of the rotary table (2). An inspection port (13) is opened on the side wall of the support rod (1) near the servo motor (12).

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