A device and method for collecting and detecting greenhouse gases in an aeration tank.

Abstract

A greenhouse gas collection and detection device and method for aeration tanks is disclosed, relating to the field of wastewater treatment technology. To address the technical problems of existing detection devices, such as fixed detection positions, lack of spatial location information for gas samples, and lack of representativeness of greenhouse gases, this invention provides a greenhouse gas collection and detection device for aeration tanks, comprising: an inlet cylinder for containing water samples; a pump for extracting gas from inside the inlet cylinder; and a gas detection chamber for gas detection. The inlet cylinder is cylindrical, with the area between its inner and outer walls serving as a receiving region. The receiving region is evenly divided into at least four even-numbered independent compartments. Each compartment, near its bottom and top surfaces, has through holes serving as a lower water inlet and an upper air outlet. This device is suitable for use in the collection and detection of greenhouse gases in aeration tanks.

Description

Technical Field

[0001] It involves the field of wastewater treatment technology, specifically the collection and detection of greenhouse gases in aeration tanks. Background Technology

[0002] Wastewater treatment plants are a vital component of modern urban infrastructure, and their operation is directly related to environmental protection and public health. However, these facilities emit large amounts of greenhouse gases during their biochemical treatment processes, primarily carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). Methane has a warming potential dozens of times higher than carbon dioxide; therefore, the emissions from wastewater treatment plants are particularly important to consider in reducing greenhouse gas emissions.

[0003] Biological treatment structures in wastewater treatment plants, such as aeration tanks, are often critical points for greenhouse gas emissions. However, due to the large surface area and depth of the wastewater contained in aeration tanks, significant differences exist in the mass transfer between wastewater, sludge, and greenhouse gases at different locations, leading to exceptionally complex and variable conditions for greenhouse gas release. Currently, greenhouse gas emission detection typically relies on monitoring devices installed at fixed locations on the water surface. However, this method has significant limitations, including large detection errors and a lack of applicability of data processing results to the entire tank.

[0004] In summary, existing detection devices suffer from the following main problems due to fixed detection locations, lack of spatial location information for gas samples, and insufficient representativeness of greenhouse gases: 1. Greenhouse gas collection and detection equipment is bulky, making it inconvenient to move and position within structures such as aeration tanks, resulting in poor representativeness of the detection data; 2. Existing technologies have low accuracy in greenhouse gas detection, making it difficult to accurately assess greenhouse gas emissions from aeration tanks; 3. Existing methods for greenhouse gas collection and detection rarely consider the differences in wastewater at different depths and locations within the corridor, limiting the reference value of the detection results. Summary of the Invention

[0005] To address the technical problems of existing detection devices, such as fixed detection positions, lack of spatial location information for gas samples, and lack of representativeness of greenhouse gases, the present invention provides the following technical solution:

[0006] A greenhouse gas collection and detection device for an aeration tank includes:

[0007] The water inlet cylinder is used to hold the water sample;

[0008] An air pump is used to extract the gas inside the water inlet cylinder;

[0009] A gas detection chamber, used for gas detection;

[0010] The water inlet cylinder is cylindrical, and the area between the inner and outer walls of the cylinder serves as a receiving area.

[0011] The accommodating area is evenly divided into at least four even-numbered independent compartments;

[0012] Each of the compartments has through holes near its bottom and top surfaces, which serve as a bottom water inlet and an top air outlet.

[0013] Furthermore, a preferred embodiment is provided in which there are 8 independent compartments separated by grids.

[0014] Furthermore, in a preferred embodiment, the device further includes a linkage structure, the linkage structure comprising:

[0015] A tee pipe is used to connect two opposing upper air outlets, and the other passage of the tee pipe serves as a gas sampling pipe connected to a vacuum pump.

[0016] The three-way pipe can rotate along the axis of the water inlet inner cylinder;

[0017] The lower T-shaped transmission rod is coaxially connected to the three-way pipe, and both ends are fixed on the inner wall of the rotating drum. The outer diameter of the rotating drum is the same as the inner diameter of the cylinder. The rotating drum is provided with corresponding through holes. The position of the through holes corresponds to the position of the lower water inlet hole, and the axis of the through holes is 45 degrees away from the axis of the upper air outlet hole connected to the three-way pipe.

[0018] Furthermore, a preferred embodiment is provided in which the three-way pipe is driven to rotate by a stepper motor.

[0019] Furthermore, a preferred embodiment is provided, which also includes a floating ring disposed on the outer wall of the device for adjusting the volume of water discharged by the device.

[0020] Furthermore, a preferred embodiment is provided in which the floating ring is inflated and deflated by an air pump to adjust the volume of water discharged.

[0021] Furthermore, a preferred embodiment is provided in which each of the independent compartments is provided with a drain pipe for draining the water sample in the independent compartment.

[0022] Based on the same inventive concept, the present invention also provides a method for collecting and detecting greenhouse gases in an aeration tank, the method being implemented using the aforementioned device, and the method comprising:

[0023] The steps for collecting wastewater samples and measuring the concentration, flow rate, and pressure of released gases at preset time points;

[0024] The step of fitting the concentration change trend using real-time monitored data;

[0025] The steps for predicting gas release potential based on the described trend and actual release conditions;

[0026] The steps involve fitting a pressure curve representing the greenhouse gas release potential based on the release potential under different pressures.

[0027] Based on the same inventive concept, the present invention also provides a computer storage medium for storing a computer program, wherein when the computer program is read by a computer, the computer executes the method described thereon.

[0028] Based on the same inventive concept, the present invention also provides a computer, including a processor and a storage medium, wherein when the processor reads a computer program stored in the storage medium, the computer executes the method described thereon.

[0029] Compared with the prior art, the advantages of the technical solution provided by the present invention are as follows:

[0030] The present invention provides a greenhouse gas collection and detection device for aeration tanks, which can effectively monitor and assess greenhouse gas emissions from structures such as aeration tanks.

[0031] The present invention provides a greenhouse gas collection and detection device for aeration tank. Through the design of linkage sampling mode, movement and positioning methods, the sampling and detection process is more convenient and efficient, and has high practicality.

[0032] The present invention provides a greenhouse gas collection and detection device for an aeration tank, which uses multiple sensors to monitor greenhouse gases in real time and predicts and evaluates the emission potential of greenhouse gases by fitting the release potential to the pressure curve, thereby improving the accuracy of the detection results.

[0033] The present invention provides a greenhouse gas collection and detection device for aeration tanks, which helps to understand and control greenhouse gas emissions from structures such as aeration tanks, thereby reducing the impact of greenhouse gases on the environment and having certain environmental protection significance.

[0034] The invention provides a greenhouse gas collection and detection device for an aeration tank, which can be combined with other related equipment and technologies to provide more support for greenhouse gas emission control and environmental protection.

[0035] The present invention provides a greenhouse gas collection and detection device for aeration tank, which takes cost control into account. The proposed device and method have high cost performance and are conducive to large-scale promotion and application.

[0036] It is suitable for use in the collection and detection of greenhouse gases in aeration tanks. Attached Figure Description

[0037] Figure 1A front cross-sectional view of a greenhouse gas collection and detection device for an aeration tank;

[0038] Figure 2 A top view of a greenhouse gas collection and detection device for an aeration tank;

[0039] Figure 3 This is a perspective view of the gas detection chamber;

[0040] Figure 4 This is a three-dimensional schematic diagram of the linkage structure;

[0041] Figure 5 for Figure 4 Exploded view.

[0042] Figure 6 for Figure 2 A schematic diagram illustrating the working principle;

[0043] Figure 7 A schematic diagram of the single-point operation steps of a greenhouse gas collection and detection device for an aeration tank;

[0044] Figure 8 A schematic diagram of the multi-point operation steps of a greenhouse gas collection and detection device for an aeration tank;

[0045] Figure 9 A schematic diagram of the linkage operation steps of a greenhouse gas collection and detection device for an aeration tank;

[0046] Figure 10 To unleash potential.

[0047] Wherein, 1 represents a greenhouse gas collection and detection device for an aeration tank; 2 represents a gas detection box; 3 represents an air pump; 4 represents an upper air outlet; 5 represents a lower water inlet; 6 represents a floating ring; 7 represents a linkage rod; 8 represents a drive stepper motor; 9 represents an inner water inlet cylinder; 10 represents a pull ring; 11 represents an air nozzle; 12 represents a vent pipe; 13 represents a gas sampling pipe; 14 represents a sliding track; 15 represents a baffle; 16 represents a flow sensor; 17 represents a water inlet on the inner cylinder; 18 represents a grid plate; 19 represents an infrared carbon dioxide gas sensor; 20 represents a laser nitrous oxide gas sensor; 21 represents a laser methane gas sensor; 22 represents a temperature and pressure integrated sensor; 24 represents a positioner; 25 represents a counterweight base plate; 26 represents a hollow flexible tube; and 27 represents an air pump. Detailed Implementation

[0048] To make the advantages and benefits of the technical solution provided by the present invention clearer, the technical solution provided by the present invention will now be described in further detail with reference to the accompanying drawings, specifically:

[0049] Implementation Method 1: This implementation method provides a greenhouse gas collection and detection device for an aeration tank, comprising:

[0050] Inner cylinder 9, used to hold water samples;

[0051] The air pump 3 is used to extract the gas inside the water inlet cylinder 9;

[0052] Gas detection box 2, used for gas detection;

[0053] The water inlet inner cylinder 9 is cylindrical, and the area between the inner and outer side walls of the cylinder serves as a receiving area.

[0054] The accommodating area is evenly divided into at least four even-numbered independent compartments;

[0055] Each of the compartments has through holes near its bottom and top surfaces, which serve as a lower water inlet 5 and an upper air outlet 4.

[0056] The air pump is connected to the gas detection box 2 via a hollow hose 26.

[0057] Implementation Method 2: This implementation method further defines the greenhouse gas collection and detection device for an aeration tank provided in Implementation Method 1. The device has 8 independent compartments, which are separated by grid plates 18.

[0058] Implementation Method 3: This implementation method further defines the greenhouse gas collection and detection device for an aeration tank provided in Implementation Method 2. The device also includes a linkage structure, which includes:

[0059] A three-way pipe is used to connect the two opposing upper air outlets 4, and the other passage of the three-way pipe serves as a gas sampling pipe 13 connected to the air pump 3.

[0060] The three-way pipe can rotate along the axis of the water inlet inner cylinder 9;

[0061] The lower T-shaped transmission rod is coaxially connected to the three-way pipe, and both ends are fixed on the inner wall of the rotating drum. The outer diameter of the rotating drum is the same as the inner diameter of the cylinder. The rotating drum is provided with corresponding through holes. The position of the through holes corresponds to the position of the lower water inlet 5, and the axis of the through holes is 45 degrees away from the axis of the upper air outlet 4 connected to the three-way pipe.

[0062] Implementation Method 4: This implementation method further defines the greenhouse gas collection and detection device for an aeration tank provided in Implementation Method 3, wherein the three-way pipeline is driven to rotate by a stepper motor.

[0063] Implementation Method 5: This implementation method further defines the greenhouse gas collection and detection device for an aeration tank provided in Implementation Method 1, and also includes a floating ring 6, which is disposed on the outer wall of the device and is used to adjust the volume of water discharged by the device.

[0064] Implementation Method Six: This implementation method further defines the greenhouse gas collection and detection device for an aeration tank provided in Implementation Method Five. The floating ring 6 is inflated and deflated by an air pump 27 to adjust the volume of the drained water.

[0065] Implementation Method Seven: This implementation method further defines the greenhouse gas collection and detection device for an aeration tank provided in Implementation Method One. Each of the independent compartments is equipped with an emptying pipe for emptying the water sample in the independent compartment.

[0066] Implementation Method Eight: This implementation method provides a method for collecting and detecting greenhouse gases in an aeration tank. The method is based on the apparatus provided in Implementation Method One, and includes:

[0067] The steps for collecting wastewater samples and measuring the concentration, flow rate, and pressure of released gases at preset time points;

[0068] The step of fitting the concentration change trend using real-time monitored data;

[0069] The steps for predicting gas release potential based on the described trend and actual release conditions;

[0070] The steps for fitting greenhouse gas release potential-pressure curves based on release potential under different pressures.

[0071] Compared with the prior art, the innovations of this invention are as follows:

[0072] 1. New chamber structure: The lower part of the chamber is closed, and water is introduced through the inlet hole for indirect sampling and testing, which can reduce the disturbance of factors such as water flow and wind changes in the aeration tank. At the same time, the chamber is evenly divided into eight compartments, and testing can be carried out in four working compartments in sequence.

[0073] 2. Linked Sampling Mode: By controlling the seven linkage rods with a rotary motor to achieve staggered hole alignment, it is possible to link sampling and testing, thereby enabling sequential and continuous water sampling and gas detection in two symmetrical compartments of the eight-compartment system. This ensures the balance of the tank while also allowing for the detection of water samples at different depths.

[0074] 3. Movement and positioning methods: The floating ring 6 and the inlet counterweight enable the box to float up and down at a single detection point; the sliding track 14 and rope traction enable the box to move to multiple points in the aeration tank corridor, and the positioner 24 enables precise positioning, thus making the data processing results more accurate and representative.

[0075] 4. Detection method: Based on the real-time detection and analysis of data using infrared carbon dioxide gas sensors, laser-based nitrous oxide gas sensors, and laser-based methane gas sensors, the negative pressure suction method can change the pressure difference between the chamber environment and the outside environment, accelerating the escape of greenhouse gases from the water.

[0076] 5. Data processing method: A scatter plot of the trend of gas concentration-negative pressure value was generated, and regression fitting was used to obtain the variation law of greenhouse gas concentration and negative pressure value; a trend curve and trend equation of emission amount-negative pressure value were generated to evaluate the greenhouse gas emission of aeration tank under different pressure conditions.

[0077] Implementation Method Nine: This implementation method provides a computer storage medium for storing a computer program. When the computer program is read by the computer, the computer executes the method provided in Implementation Method Five.

[0078] Implementation Method 10: This implementation method provides a computer, including a processor and a storage medium. When the processor reads a computer program stored in the storage medium, the computer executes the method provided in Implementation Method 5.

[0079] Implementation Method Eleven: This implementation method provides a specific example to describe the above implementation method in detail, as follows:

[0080] The configuration of the scheme is as follows:

[0081] The gas detection chamber 2 is a hollow chamber, internally equipped with a gas sensor, a temperature and pressure integrated sensor 22, and a positioner 24. Specifically, the carbon dioxide gas concentration is detected by an infrared gas sensor, the nitrous oxide gas concentration by a laser-type nitrous oxide gas sensor, and the methane gas concentration by a laser-type methane gas sensor. Correspondingly, the pressure change value and temperature are detected and fed back by the temperature and pressure integrated sensor 22; the positioner 24 can verify the position of the chamber at a single point.

[0082] Baffle 15: Used to prevent water sample from being submerged up to the position of the upper air outlet 4.

[0083] Flow meter: measures the flow rate of gas in the chamber during the measurement and detection cycle.

[0084] To ensure that the cylindrical tank achieves a communicating vessel state (i.e., the internal and external liquid levels are equal) in water and does not sink due to water ingress, the tank must meet the following two conditions when tested after being submerged in water:

[0085] 1. The water level inside the tank needs to be higher than the opening so that water can enter and be level with the external water surface.

[0086] 2. Even after water enters the tank, the buoyancy of the tank is still sufficient to support its weight and prevent it from sinking.

[0087] Ensure the immersion depth is greater than h:

[0088] Let the immersion depth be h1 (h ≤ h1 ≤ maximum liquid level in the tank), then the buoyancy F1 can be expressed as:

[0089] F1=ρ*A*d*g+F 浮动圈6

[0090] When the outer wall radius of the box is r1 and the inner wall radius is r2

[0091] A = (r1 - r2)^2

[0092] Let the net weight of the main body of the box (without water) be m1, and the weight of the counterweight base plate be 25 m2.

[0093] The weight G1 of the box can be expressed as:

[0094] G1 = m1*g + m2*g,

[0095] To achieve a immersion depth greater than h, the buoyancy force must be greater than or equal to the weight, i.e.:

[0096] ρ*A*h1*g+ρ*v1*g+F 浮动圈6 ≥m1*g+m2*g,

[0097] Ensure sufficient buoyancy to support the tank and its weight after water ingress:

[0098] When water enters the tank, its mass increases. Let the mass of the water entering be m3, then the volume of the water entering is v2 = m3 / ρ. After the water enters, the total mass of the tank is M = (m1 + m2 + m3), and the depth of the liquid surface in the tank at this point is h3. The buoyancy F2 can be expressed as:

[0099] F2=ρ*A*(h3)*g+ρ*v1*g+F 浮动圈6，

[0100] The total weight G2 of the box can be expressed as:

[0101] G2 = (m1 + m2 + m3) * g,

[0102] To ensure sufficient buoyancy to support the tank and its weight after water ingress, the following conditions must be met:

[0103] ρ*A*(h3)*g+ρ*v1*g+F 浮动圈6 ≥(m1+m2+m3)*g,

[0104] Combining the two conditions above, we can obtain the following inequality:

[0105] When all working compartments are full of water, the tank will not sink. Assume the total mass of the tank and counterweight base plate is M, and the maximum immersion depth is H. The following conditions must be met:

[0106] ρ*A*H*g+ρ*v1*g+F 浮动圈6全充满+ F 配重底板25 ≥Mg,

[0107] In summary:

[0108] ρ*A*h1*g+ρ*v1*g+F 浮动圈6部分充满 ≥m1*g+m2*g,

[0109] ρ*A*(h3)*g+ρ*v1*g+F 浮动圈6部分充满 ≥(m1+m2+m3)*g,

[0110] ρ*A*H*g+ρ*v1*g+F 浮动圈6全充满+ F 配重底板25 ≥Mg.

[0111] When using,

[0112] 1. Before conducting any testing, the following steps must be performed to ensure everything is in order:

[0113] 2. Ensure that the water inlet hole on the inner water inlet cylinder 9 is aligned.

[0114] 3. Place the water inlet inner cylinder 9 at the beginning of the corridor to be tested.

[0115] 4. Control the air nozzle 11 to release the gas inside the floating ring 6, so that it is in a semi-filled state.

[0116] 5. Pull one end of the rope attached to the pull ring 10 to move the greenhouse gas collection and detection device in the aeration tank.

[0117] 6. Use positioner 24 to position the device at the first test point.

[0118] 7. Secure the rope by tying the other end to the anchor post.

[0119] After fixing, proceed with the following steps:

[0120] 8. Lower the device so that the water inlet hole of the inner water inlet cylinder 9 is aligned with the lower water inlet hole 5 on the working section, and start water intake.

[0121] 9. Start the vacuum pump 3 to extract the gas, and test the gas concentration under different negative pressures.

[0122] 10. Record the concentrations of carbon dioxide, nitrous oxide, and methane gases and their changes.

[0123] 11. Measure pressure changes and temperature, as well as gas extraction flow rate, using sensors.

[0124] Once the gas concentration in working compartment (1) has stabilized, perform the following steps:

[0125] 12. The first pulse signal command is transmitted to drive the device to perform a second fixed-angle rotation.

[0126] 13. Align the water inlet hole of the inner cylinder 9 with the lower water inlet hole 5 on the working compartment (2) and start water intake.

[0127] 14. Continue gas extraction and testing.

[0128] Once the gas concentration in working compartment (2) has stabilized, perform the following steps:

[0129] 15. A second pulse signal command is sent to drive the device to perform a third fixed-angle rotation.

[0130] 16. Align the water inlet hole of the inner cylinder 9 with the lower water inlet hole 5 on the working section (3) and start water intake.

[0131] 17. Continue gas extraction and testing, following the same principle.

[0132] 18. Repeat the above steps until the periodic testing of the first preset point is completed. After completion, move the device to the second preset test point and then perform the test according to the same working mode.

[0133] 19. Repeat these steps to complete the testing of all locations step by step.

[0134] Specifically,

[0135] Before conducting the testing, ensure that the water inlet hole on the inner cylinder 9 is aligned. Then, place it at the beginning of the test corridor and simultaneously control the air pump 27 to release gas from the floating ring 6 through the air nozzle 11 and hollow hose 26, leaving it partially filled. Pull one end of the rope, which is secured to the pull ring 10, to move the greenhouse gas collection and detection device for the aeration tank. Use the locator 24 to position the device at the first test point. After moving the device to the test point, secure the other end of the rope to the fixed stake.

[0136] After fixing, the greenhouse gas collection and detection device for the aeration tank is lowered. The water inlet hole on the inner cylinder 9 is aligned with the lower water inlet hole 5 on the corresponding working compartment composed of partitions to form a passage for water to enter. Since the gas sampling tube 13 is misaligned with the lower water inlet hole 5, it is aligned with the upper air outlet hole 4 on the working compartment. Since there is no liquid in the working compartment, no air is pumped out. Due to the principle of communicating vessels and the buoyancy of the floating ring 6, the water in the working compartment will eventually reach a stable state. After reaching a stable state, the tank will stop taking in water. At this time, the first pulse signal command is sent to start the stepper motor 8 to drive the linkage rod 7 to control the water inlet cylinder 9 and the gas sampling tube 13 to rotate at a fixed angle on the sliding track 14 for the second time. The water inlet hole on the water inlet cylinder 9 is aligned with the lower water inlet hole 5 on the working compartment to form a passage and start water intake. As the water intake begins to descend, the working compartment is closed due to the obstruction of the wall of the water inlet cylinder 9. The gas sampling tube 13 rotates synchronously and aligns with the upper air outlet hole 4 on the working compartment to form a gas passage. At this time, the air pump 3 is turned on to extract air. The concentration of gas flowing through the gas sampling tube 13 is detected under negative pressures of -0KPa, -10KPa, -20KPa, and -30KPa respectively. The concentration values ​​of carbon dioxide, nitrous oxide, and methane gas in the wastewater of the working compartment and their changes are recorded in real time by the gas sensor. Specifically, the carbon dioxide gas concentration is detected by an infrared gas sensor, the nitrous oxide gas concentration is detected by a laser-type nitrous oxide gas sensor, and the methane gas concentration is detected by a laser-type methane gas sensor. Correspondingly, the pressure change value and temperature are detected and fed back by the integrated temperature and pressure sensor 22, and the gas extraction flow rate is measured by the flow sensor 16.

[0137] After the gas concentration in the working compartment stabilizes, a second pulse signal command is emitted, activating the stepper motor 8 to drive the linkage rod 7, controlling the water inlet cylinder 9 and the gas sampling tube 13 to rotate a third time at a fixed angle on the sliding track 14. The water inlet hole on the water inlet cylinder 9 aligns with the lower water inlet hole 5 on the working compartment, forming a passage for water intake. The gas collection and detection device continues to descend with the water intake, and the gas sampling tube 13 rotates synchronously, aligning with the upper air outlet hole 4 on the working compartment to form a gas passage. At this time, the vacuum pump 3 is activated for air extraction and detection, using the same detection method as above. The working compartment remains closed due to the obstruction of the water inlet cylinder 9 wall, and the gas sampling tube 13 rotates synchronously. After the gas concentration in the working compartment stabilizes, a third pulse signal command is emitted, controlling the working compartment for air extraction, detection, and water intake according to the same working principle as the first and second pulse commands. Similarly, after the gas concentration and water inlet values ​​in the working compartments have stabilized, a fourth pulse signal command is sent to control the first compartment to perform air extraction and water inlet. At this time, the linkage structure is in its initial state. The water inlet hole on the inner cylinder 9 aligns with the lower water inlet hole 5 on the corresponding working compartment composed of partitions to form a passage and begin secondary water inlet. The gas collection and detection device continues to descend until a stable equilibrium state is reached. After reaching a stable equilibrium state, the air pump 27 is controlled to inflate the floating ring 6 through the hollow hose 26 connected to the air nozzle 11, so that it is completely filled, thereby causing the greenhouse gas collection and detection device of the aeration tank to float to the water surface. The vent pipe 12 is opened to release the residual sewage in the tank.

[0138] Repeat the measurement three times to complete the periodic detection work at the first preset point. After completing the detection work at the first preset point, move the greenhouse gas collection and detection device of the aeration tank to the second preset point and conduct the detection work in the same working mode as the first test point.

[0139] Repeat the above steps to gradually complete the testing of all locations.

[0140] Working principle and explanation:

[0141] Selection of sampling points and movement and fixation of the detection device:

[0142] Sampling point selection: Before the detection begins, image recognition and manual sampling detection methods are used to determine feature points with detection value.

[0143] The container's movement and fixation: Horizontal movement is achieved via ropes. Three pull rings 10 are evenly distributed along the top outer edge of the container, with two ropes looped onto the track at a 120° angle for horizontal movement. The track is placed parallel to the corridor. On the other side, one end of a single rope is fixed to the container, while the other end can be manually swung to allow manual pushing of the container forward. On the other side of the corridor, fixed posts are provided, to which ropes can be tied to stabilize the container's position. When the container is pulled to a preset location, an internal locator 24 checks and controls its position to minimize deviations that may be caused by manual traction. For vertical movement, floating rings 6 and inlet counterweights are used.

[0144] Before starting the single-point testing work, the gas in the floating ring 6 is released by controlling the air nozzle 11 to partially fill it, thereby reducing the buoyancy of the box and allowing it to sink through the water intake, but not completely sink to the bottom.

[0145] During the testing process, as water is sequentially introduced into each working compartment, the counterweight of the chamber gradually increases, causing the chamber to begin to sink. By controlling the water inlet holes in a staggered manner, water is introduced into one working compartment while the other three are stopped. Each water introduction causes the chamber to sink to a certain depth, and continuous water introduction causes continuous changes in the liquid level. By controlling the air valve to inflate the floating ring 6, the testing chamber can be made to float vertically at a single point.

[0146] Gas sample collection and detection:

[0147] The working principle involves using a suction pump to generate negative pressure, accelerating the diffusion of carbon dioxide, nitrous oxide, and methane from the liquid inside the chamber. Due to the staggered linkage structure, gas sample collection and detection are synchronized with the water inlet of the working compartment, ensuring that gas extraction and detection are performed in the i-th compartment simultaneously with water inlet in the (i+1)-th compartment. By adjusting the suction pressure of the vacuum pump, greenhouse gases inside the chamber can be collected and detected under different pressure conditions.

[0148] Plotting the gas release trend curve:

[0149] The data records include instantaneous gas pressure, concentration, and flow rate values ​​in gas sampling tube 13. These data can be processed using Excel regression fitting tools to generate trend lines and trend equations reflecting greenhouse gas release under different pressure conditions. These trend lines and equations help analyze and understand greenhouse gas release trends and potential.

[0150] The specific data processing steps are as follows:

[0151] Adjust the working pressure of the vacuum pump until the negative pressure value stabilizes at -10 kPa, that is, when the pressure value inside the chamber stabilizes at 91 kPa. Observe the concentration detection value of the methane gas sensor and record the concentration value at time intervals longer than the sensor response time. When the concentration detection value of the methane gas sensor stabilizes, calculate the average concentration value C1 based on the concentrations recorded within this time period. Calculate the pumping volume from the start of adjusting the working pressure to the point where the concentration value stabilizes at C1 using the performance parameters of the vacuum pump and the flow meter detection value, and record it as V1. Multiply V1 by the stable concentration C1 to obtain the release evaluation value f1 under the negative pressure condition of -10 kPa. Calculate the cumulative release value F1 = f1 under -10 kPa.

[0152] Adjust the working pressure of the vacuum pump until the negative pressure value stabilizes at -20 kPa, i.e., the pressure value inside the chamber stabilizes at 81 kPa. Observe the concentration detection value of the methane gas sensor and record the concentration value at time intervals longer than the sensor response time. When the concentration detection value of the methane gas sensor stabilizes, calculate the average concentration value C2 based on the concentration values ​​recorded within this time period. Calculate the pumping volume from the start of adjusting the working pressure to the point where the concentration value stabilizes at C2 using the performance parameters of the vacuum pump and the flow meter detection value, and record it as V2. Multiply V2 by C2 to obtain the release evaluation value f2 under the negative pressure value of -20 kPa. Summing f1 and f2 gives the cumulative release value F2 under the negative pressure value of -20 kPa.

[0153] Adjust the working pressure of the vacuum pump until the negative pressure value stabilizes at -30 kPa, i.e., the pressure value inside the chamber stabilizes at 71 kPa. Observe the change in the concentration detection value of the methane gas sensor. When the concentration detection value of the methane gas sensor stabilizes, calculate the average concentration value C3 based on the concentration values ​​recorded during this period. Calculate the pumping volume from the start of adjusting the working pressure to the point where the concentration value stabilizes at C3 using the performance parameters of the vacuum pump and the flow meter readings. Record this volume as V3. Multiply V3 by the stabilized concentration C3 to obtain the release assessment value f3 under the negative pressure condition of -30 kPa. Summing f1, f2, and f3 yields the cumulative release value F3 under the -30 kPa condition.

[0154] Under normal pressure, i.e., when the pressure inside the chamber is 101 kPa, the amount of gas spontaneously released from the gas detection chamber is called the normal release value F0.

[0155] parameter 1 2 3 4 Negative pressure value (kPa) -0 -10 -20 -30 <![CDATA[Release amount (m 3 / s)]]> F0 F1 F2 F3

[0156] Data fitting steps:

[0157] Plotting discrete points: Using Excel's charting tools, with the negative pressure value P as the X-axis and the release amount F as the Y-axis, select XY scatter plot to plot the data points.

[0158] Fitting a trendline: Use Excel's trendline function to select the best-fit curve for the discrete points.

[0159] Formula derivation: Using Excel's trendline function, the equation for the approximate fitted curve is derived.

[0160] Fitting results: A trend line of release amount versus negative pressure and its equation F(P) are formed.

[0161] The equation F(P) is defined as a release-negative pressure regression model.

[0162] Figure 10 The curve shown describes the release potential of a certain volume of mixture in the tank under a certain pressure. Extending the curve to the left to intersect the Y-axis, we can obtain the conventional release value F0 under 1 atmosphere. As the negative pressure test continues, the cumulative release value will approach a certain value, denoted as Fm. Fm can predict the ultimate potential release of a certain volume of mixture in the tank.

[0163] Practical applications of these models and parameters may require experiments and data collection, followed by analysis and fitting of the data using Excel or other tools to derive appropriate trend lines and equations. These models and parameters can be used to study the behavior of gas release and concentration changes under different pressure conditions.

[0164] The above description of several specific embodiments further details the technical solution provided by the present invention in order to highlight the advantages and benefits of the technical solution provided by the present invention. However, the above-described specific embodiments are not intended to limit the present invention. Any reasonable modifications and improvements to the present invention, combinations of embodiments, and equivalent substitutions based on the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0165] In the description of this specification, only preferred embodiments of the present invention are described, and should not be construed as limiting the scope of the invention. Furthermore, the use of terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or N embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction. Additionally, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of the present invention, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified. Any process or method described in the flowcharts or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logical functions or processes, and the scope of preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain. The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, a “computer-readable medium” can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection having one or N wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic device, and portable optical disc read-only memory (CDROM).Furthermore, the computer-readable medium can even be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory. It should be understood that various parts of the invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0166] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it includes one or a combination of the steps of the method embodiments. Furthermore, the functional units in the various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

Claims

1. A greenhouse gas collection and detection device for an aeration tank, characterized in that, include: The water inlet cylinder is used to hold the water sample; An air pump is used to extract the gas inside the water inlet cylinder; A gas detection chamber, used for gas detection; The water inlet cylinder is cylindrical, and the area between the inner and outer walls of the cylinder serves as a receiving area. The accommodating area is evenly divided into at least four even-numbered independent compartments; Each of the compartments is provided with through holes near its bottom and top surfaces, serving as a bottom water inlet and an top air outlet; It also includes a baffle to prevent the water sample from being submerged to the upper vent. Pull one end of the rope, which is fastened to the pull ring, to move the greenhouse gas collection and detection device in the aeration tank, and use the locator to position the greenhouse gas collection and detection device in the aeration tank to the first test point. After the box is moved to the point to be measured, the other end of the rope is tied to the fixed stake for fixation.

2. The greenhouse gas collection and detection device for an aeration tank according to claim 1, characterized in that, There are 8 independent compartments, which are separated by grids.

3. The greenhouse gas collection and detection device for an aeration tank according to claim 2, characterized in that, The device further includes a linkage structure, the linkage structure comprising: A tee pipe is used to connect two opposing upper air outlets, and the other passage of the tee pipe serves as a gas sampling pipe connected to a vacuum pump. The three-way pipe can rotate along the axis of the water inlet inner cylinder; The lower T-shaped transmission rod is coaxially connected to the three-way pipe, and both ends are fixed on the inner wall of the rotating drum. The outer diameter of the rotating drum is the same as the inner diameter of the cylinder. The rotating drum is provided with corresponding through holes. The position of the through holes corresponds to the position of the lower water inlet hole, and the axis of the through holes is 45 degrees away from the axis of the upper air outlet hole connected to the three-way pipe.

4. The greenhouse gas collection and detection device for an aeration tank according to claim 3, characterized in that, The three-way pipe is driven to rotate by a stepper motor.

5. The greenhouse gas collection and detection device for an aeration tank according to claim 1, characterized in that, It also includes a floating ring, which is installed on the outer wall of the device, for adjusting the volume of water discharged by the device.

6. The greenhouse gas collection and detection device for an aeration tank according to claim 5, characterized in that, The floating ring is inflated and deflated by an air pump to adjust the volume of water discharged.

7. The greenhouse gas collection and detection device for an aeration tank according to claim 1, characterized in that, Each of the independent compartments is equipped with a drain pipe for draining the water sample from the compartment.

8. A method for collecting and detecting greenhouse gases in an aeration tank, characterized in that, The method is implemented based on the apparatus of claim 1, and the method includes: The steps for collecting wastewater samples and measuring the concentration, flow rate, and pressure of released gases at preset time points; The step of fitting the concentration change trend using real-time monitored data; The steps for predicting gas release potential based on the described trend and actual release conditions; The steps for fitting greenhouse gas release potential-pressure curves based on release potential under different pressures.

9. A computer storage medium for storing computer programs, characterized in that, When the computer program is read by the computer, the computer executes the method of claim 8.

10. A computer, including a processor and a storage medium, characterized in that, When the processor reads the computer program stored in the storage medium, the computer executes the method of claim 8.

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