A system and method for controlling emissions of methane greenhouse gases

Abstract

The present application relates to the technical field of methane emission monitoring, and particularly relates to a methane greenhouse gas emission control system, which comprises a control module connected with a data acquisition module, a data storage module and a methane emission treatment module; the control module comprises a controller configured to control the methane emission treatment module to discharge the methane generated in an anaerobic zone according to the information collected by the data acquisition module; in the present application, when the system is in use, the methane detector can be used to detect the methane concentration in the anaerobic zone at the moment, and the temperature detection unit can be used to detect the temperature value in the anaerobic zone at the moment, so as to obtain two groups of detection data at the same time, and then the two groups of detection data are uploaded to the controller and stored in the data storage module; then the controller issues a control instruction to the methane emission treatment module according to the two groups of detection data, so as to timely discharge the methane in the anaerobic zone and keep the temperature of the anaerobic zone in the suitable environment of anaerobic microorganisms.

Description

Technical Field

[0001] The present invention relates to the technical field of methane emission monitoring, and in particular to an emission control system and method based on methane greenhouse gas. Background Art

[0002] Methane in the atmosphere is an important greenhouse gas second only to carbon dioxide in its contribution to global warming, and methane produced in sewage treatment is the second largest emission source. Sewage treatment mostly uses anaerobic processes, in which anaerobic microorganisms can produce methanogens, which are used in sewage hydrolysis, acidification and hydrogen production reactions to convert the formed acetic acid, hydrogen and carbon dioxide into methane. Anaerobic microorganisms are extremely sensitive to temperature and environment and are suitable for growing in an environment of 20-42°C. Since methane has a certain calorific value, it can reduce energy consumption losses in the anaerobic zone, so that the temperature in the anaerobic zone is in a suitable environment for anaerobic microorganisms. However, when the concentration of methane reaches a certain value, it will affect the temperature control balance in the anaerobic zone and reduce the survival rate of anaerobic treatment microorganisms, necessitating timely discharge.

[0003] Therefore, there is an urgent need to provide a methane greenhouse gas emission control system and method for accurately controlling the emission of methane in the anaerobic zone. Summary of the Invention

[0004] The purpose of the present invention is to provide an emission control system based on methane greenhouse gas, which mainly solves the technical problems mentioned in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A methane greenhouse gas emission control system includes a control module connected to a data acquisition module, a data storage module and a methane emission processing module;

[0007] The control module includes a controller, which is used to control the methane emission processing module to emit methane generated in the anaerobic zone according to the information collected by the data acquisition module;

[0008] The data acquisition module includes a methane collection unit and a temperature detection unit, both of which are arranged in the anaerobic zone. A methane detector is provided at the air inlet of the methane collection unit for detecting the concentration of methane in the anaerobic zone, and the temperature detection unit is used to detect the temperature in the anaerobic zone;

[0009] The methane emission processing module is arranged at the exhaust port of the methane collection unit and is used to discharge the methane in the anaerobic zone;

[0010] The data storage module is used to store detection data of the methane detector and the temperature detection unit.

[0011] Preferably, the methane emission processing module includes a T-shaped exhaust pipe, one end of which is mounted on the exhaust port of the methane collection unit;

[0012] A methane emission unit is provided at the other end of the T-shaped exhaust pipe, and an exhaust valve is provided at the air inlet of the methane emission unit, and the methane emission unit is used to discharge the methane gas in the anaerobic zone;

[0013] The remaining end of the T-shaped exhaust pipe is provided with a methane recovery unit, and the air inlet of the methane recovery unit is provided with a recovery valve;

[0014] The methane recovery and utilization unit includes a combustion chamber and an electric spark heating component arranged on one side of the anaerobic zone. The exhaust valve, the recovery valve and the electric spark heating component are electrically connected to the controller respectively.

[0015] Preferably, the control module further comprises a display screen and a control panel, and the display screen and the control panel are electrically connected to the controller respectively;

[0016] The display screen is used to display the current temperature value and methane concentration value in the anaerobic zone;

[0017] The control panel is used to input detection thresholds of the temperature detection unit and the methane detector respectively.

[0018] Preferably, the model of the methane detector is HNAG900-6-G, and the threshold range of the methane detector is set to 0.5%-1.25%.

[0019] Preferably, the threshold range of the temperature detection unit is set to 20°C-42°C.

[0020] A methane greenhouse gas emission control method, applied to the above-mentioned methane greenhouse gas emission control system, specifically comprises the following steps:

[0021] S1. First, set the detection thresholds of the methane detector and the temperature detection unit respectively through the control panel;

[0022] S2. Then, the methane concentration in the anaerobic zone at this moment is detected by the methane detector, and the temperature value in the anaerobic zone at this moment is detected by the temperature detection unit to obtain two sets of detection data at the same moment, and the two sets of detection data are uploaded to the controller and stored in the data storage module. Then, based on whether the temperature value and methane concentration in the anaerobic zone at this moment exceed the detection threshold, it is determined whether methane has entered the methane emission processing module;

[0023] S3. If the temperature and methane concentration in the anaerobic zone exceed the detection threshold, the methane enters the methane emission treatment module;

[0024] If the methane concentration in the anaerobic zone exceeds the detection threshold and the temperature value in the anaerobic zone does not exceed the detection threshold, the methane enters the methane emission processing module;

[0025] If the temperature and methane concentration in the anaerobic zone do not exceed the detection threshold at this time, the methane does not enter the methane emission treatment module;

[0026] If the temperature value in the anaerobic zone exceeds the detection threshold and the methane concentration does not exceed the detection threshold, the methane enters the methane emission processing module.

[0027] Preferably, the S3 specifically includes:

[0028] If the temperature and methane concentration in the anaerobic zone exceed the detection threshold at this time, the controller controls the exhaust valve to be in an open state and the recovery valve to be in a closed state, so that the methane is discharged into the methane emission unit;

[0029] If the methane concentration in the anaerobic zone exceeds the detection threshold and the temperature value in the anaerobic zone does not exceed the detection threshold at this time, the controller controls the recovery valve to be in an open state and the exhaust valve to be in a closed state, so that the methane is discharged into the methane recovery and utilization unit, and the methane is added to the combustion chamber in multiple times, and then the electric spark heating component is controlled to ignite the methane in the combustion chamber to heat the anaerobic zone until the temperature value of the anaerobic zone reaches the detection threshold of the temperature detection unit;

[0030] If the temperature and methane concentration in the anaerobic zone do not exceed the detection threshold at this time, the controller controls the exhaust valve and the recovery valve to be in a closed state, so that methane does not enter the methane emission treatment module;

[0031] If the temperature in the anaerobic zone exceeds the detection threshold and the methane concentration does not exceed the detection threshold, the controller controls the exhaust valve to be in an open state and the recovery valve to be in a closed state, so that methane is discharged into the methane emission unit.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] In the present invention, when the system is used, the detection thresholds of the methane detector and the temperature detection unit are first set; then the methane concentration in the anaerobic zone at this time is detected by the methane detector, and the temperature value in the anaerobic zone at this time is detected by the temperature detection unit, so as to obtain two sets of detection data at the same time, and the two sets of detection data are uploaded to the controller and stored in the data storage module for real-time monitoring of the methane emission in the sewage biological treatment system, so as to facilitate accurate control of methane emission; then the controller issues control instructions to the methane emission processing module according to the two sets of detection data, so as to timely discharge the methane in the anaerobic zone, so that the temperature in the anaerobic zone is in a suitable environment for anaerobic microorganisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 This is a block diagram of a methane greenhouse gas emission control system according to the present invention;

[0036] Figure 2 This is a schematic structural diagram of a methane greenhouse gas emission control system according to the present invention;

[0037] In the figure: anaerobic zone 1, methane collection unit 2, methane detector 3, temperature detection unit 4, T-shaped exhaust pipe 5, exhaust valve 6, recovery valve 7, combustion chamber 8, electric spark heating component 9, control valve 10, methane emission unit 11. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] like Figure 1-Figure 2As shown, the present application provides a methane greenhouse gas emission control system, which comprises a control module connected with a data acquisition module, a data storage module and a methane emission treatment module; the control module comprises a controller for controlling the methane emission treatment module to discharge the methane generated in the anaerobic zone 1 according to the information collected by the data acquisition module; the data acquisition module comprises a methane collection unit 2 and a temperature detection unit 4 (the threshold range of the temperature detection unit 4 is set to 20-42℃, and is set to 30℃ in this embodiment), the methane collection unit 2 is installed at the top of the anaerobic zone 1, a methane detector 3 (model HNAG900-6-G) is installed at the gas inlet of the methane collection unit 2, and the threshold of the methane detector 3 is set to 0.8% (within the minimum combustion threshold range of methane 0.5%-1.25%), which is used to detect the concentration of methane in the anaerobic zone 1; the exhaust port of the methane collection unit 2 penetrates the top end of the anaerobic zone 1 and is installed with the methane emission treatment module, which is used to discharge the methane in the anaerobic zone 1; the temperature detection unit 4 is installed in the anaerobic zone 1 and close to the side of anaerobic microorganisms, which is convenient for detecting whether the anaerobic microorganisms in the anaerobic zone 1 are in a suitable environment.

[0040] It should be noted that the temperature detection unit 4 in the present application is used to monitor the water temperature of the anaerobic zone 1 in the sewage biological treatment system, so as to control the water temperature of the anaerobic zone 1 to keep in a suitable environment for the survival of anaerobic microorganisms. Since different types of sewage contain different chemical elements, the temperature detection unit 4 can select a suitable water temperature detector according to the type of sewage.

[0041] In this embodiment, when the system is used, first, the detection thresholds of the methane detector 3 and the temperature detection unit 4 are set; then the methane concentration in the anaerobic zone 1 at this time is detected by the methane detector 3, and the temperature value in the anaerobic zone 1 at this time is detected by the temperature detection unit 4, two sets of detection data at the same time are obtained, and the two sets of detection data are uploaded to the controller and stored in the data storage module, which is used to monitor the methane emission amount in the sewage biological treatment system in real time, so as to control the methane emission accurately; then the controller issues a control instruction to the methane emission treatment module according to the two sets of detection data, so as to discharge the methane in the anaerobic zone 1 in time, so that the temperature of the anaerobic zone 1 is in a suitable environment for anaerobic microorganisms.

[0042] Specifically, the methane emission treatment module includes a T-shaped exhaust pipeline 5, one end of the T-shaped exhaust pipeline 5 is fixedly installed on the exhaust port of the methane collection unit 2; the other end of the T-shaped exhaust pipeline 5 is fixedly installed with a methane emission unit 11, and the gas inlet of the methane emission unit 11 is installed with an exhaust valve 6; the remaining end of the T-shaped exhaust pipeline 5 is fixedly installed with a methane recycling unit, and the gas inlet of the methane recycling unit is installed with a recycling valve 7; the methane recycling unit includes a combustion chamber 8 installed on one side of the anaerobic zone 1 and an electric spark heating assembly 9, which is used to emit the methane into the combustion chamber 8 for multiple times, and ignite the methane in the combustion chamber 8 by the electric spark heating assembly 9 to heat the anaerobic zone 1 until the temperature value of the anaerobic zone 1 reaches the detection threshold of the temperature detection unit 4; the exhaust valve 6, the recycling valve 7 and the electric spark heating assembly 9 are electrically connected with the controller respectively.

[0043] When it is detected that the temperature value in the anaerobic zone 1 exceeds the detection threshold and the methane concentration exceeds or does not exceed the detection threshold, the controller controls the exhaust valve 6 to open and the recycling valve 7 to close, so that the methane is emitted into the methane emission unit 11, and the concentration of the methane is controlled to be below the minimum combustion threshold before being emitted into the atmosphere, thereby avoiding safety hazards in the emission process; when it is detected that the methane concentration in the anaerobic zone 1 exceeds the detection threshold and the temperature value in the anaerobic zone 1 does not exceed the detection threshold, the controller controls the recycling valve 7 to open and the exhaust valve 6 to close, so that the methane is emitted into the methane recycling unit, and then the methane is emitted into the combustion chamber 8 for multiple times, and the methane in the combustion chamber 8 is ignited by the electric spark heating assembly 9 to heat the anaerobic zone 1, thereby the methane generated in the anaerobic zone 1 can be utilized twice, and the emission amount of the methane into the atmosphere is reduced; when it is detected that the temperature value and the methane concentration in the anaerobic zone 1 both do not exceed the detection threshold, the controller controls the exhaust valve 6 and the recycling valve 7 to close, so that the methane is stored in the anaerobic zone 1 to play a certain heat preservation role and reduce energy consumption loss.

[0044] It should be noted that: in the embodiment, when the methane concentration in the methane emission unit 11 exceeds the minimum combustion threshold, the methane can be recycled as fuel and is not directly emitted into the atmosphere, which is used for energy consumption, and the emission of the greenhouse gas in the atmosphere can be effectively reduced; when the methane concentration in the methane emission unit 11 does not exceed the minimum combustion threshold, the methane can be directly emitted into the atmosphere.

[0045] It should be noted that: the air inlet of the combustion chamber 8 is provided with a control valve 10, which is convenient for adding methane into the combustion chamber 8 for combustion in a quantitative manner, and preventing the electric spark heating component 9 from igniting all the methane in the entire system and causing an explosion; at the same time, the exhaust port of the combustion chamber 8 is also provided with a control valve 10, which is convenient for discharging the exhaust gas after the methane in the combustion chamber 8 is burned, so as to be used for the next methane filling in the combustion chamber 8; in this embodiment, in order to ensure the stable operation of the system, the control valves 10 of the air inlet and exhaust port of the combustion chamber 8 are respectively electrically connected to the controller to facilitate integrated control.

[0046] Specifically, the control module also includes a display screen and a control panel, which are electrically connected to the controller respectively; the display screen is used to display the current temperature value and methane concentration value in the anaerobic zone 1; the control panel is used to input the threshold values ​​of the temperature detection unit 4 and the methane detector 3 respectively.

[0047] A methane greenhouse gas emission control method, applied to the above-mentioned methane greenhouse gas emission control system, specifically comprises the following steps:

[0048] Step 1: First, set the detection thresholds of the methane detector 3 and the temperature detection unit 4 respectively through the control panel;

[0049] Step 2: The methane concentration in the anaerobic zone 1 at this time is then detected by the methane detector 3, and the temperature value in the anaerobic zone 1 at this time is detected by the temperature detection unit 4 to obtain two sets of detection data at the same time, and the detection data are uploaded to the controller and stored in the data storage module. Then, based on whether the temperature value and methane concentration of the anaerobic zone 1 at this time exceed the detection threshold, it is determined whether methane enters the methane emission treatment module;

[0050] Step 3: If the temperature and methane concentration in the anaerobic zone 1 exceed the detection threshold, the controller controls the exhaust valve 6 to be in an open state and the recovery valve 7 to be in a closed state, so that the methane is discharged into the methane emission unit 11;

[0051] If the methane concentration in the anaerobic zone 1 exceeds the detection threshold and the temperature value in the anaerobic zone 1 does not exceed the detection threshold, the controller controls the recovery valve 7 to be in an open state and the exhaust valve 6 to be in a closed state, so that the methane is discharged into the methane recovery and utilization unit, and the methane is added to the combustion chamber 8 in multiple times, and then the electric spark heating component 9 is controlled to ignite the methane in the combustion chamber 8 to heat the anaerobic zone 1 until the temperature value of the anaerobic zone 1 reaches the detection threshold of the temperature detection unit 4;

[0052] If the temperature and methane concentration in the anaerobic zone 1 do not exceed the detection threshold at this time, the controller controls the exhaust valve 6 and the recovery valve 7 to be in a closed state, so that methane does not enter the methane emission treatment module;

[0053] If the temperature in the anaerobic zone 1 exceeds the detection threshold and the methane concentration does not exceed the detection threshold, the controller controls the exhaust valve 6 to be open and the recovery valve 7 to be closed, so that the methane is discharged into the methane emission unit 11.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A methane greenhouse gas emission control system, characterized by: It includes a control module, wherein the control module is connected to a data acquisition module, a data storage module and a methane emission processing module; The control module includes a controller, which is used to control the methane emission processing module to emit methane generated in the anaerobic zone according to the information collected by the data acquisition module; The data acquisition module includes a methane collection unit and a temperature detection unit, both of which are arranged in the anaerobic zone. A methane detector is provided at the air inlet of the methane collection unit for detecting the concentration of methane in the anaerobic zone, and the temperature detection unit is used to detect the temperature in the anaerobic zone; The methane emission processing module is arranged at the exhaust port of the methane collection unit and is used to discharge the methane in the anaerobic zone; The data storage module is used to store the detection data of the methane detector and the temperature detection unit; The methane emission processing module includes a T-shaped exhaust pipe, one end of which is mounted on the exhaust port of the methane collection unit; A methane emission unit is provided at the other end of the T-shaped exhaust pipe, and an exhaust valve is provided at the air inlet of the methane emission unit, and the methane emission unit is used to discharge the methane gas in the anaerobic zone; The remaining end of the T-shaped exhaust pipe is provided with a methane recovery unit, and the air inlet of the methane recovery unit is provided with a recovery valve; The methane recovery and utilization unit includes a combustion chamber and an electric spark heating component arranged on one side of the anaerobic zone. The exhaust valve, the recovery valve and the electric spark heating component are electrically connected to the controller respectively.

2. A methane greenhouse gas emission control system according to claim 1, characterized in that: The control module further comprises a display screen and a control panel, wherein the display screen and the control panel are electrically connected to the controller respectively; The display screen is used to display the current temperature value and methane concentration value in the anaerobic zone; The control panel is used to input detection thresholds of the temperature detection unit and the methane detector respectively.

3. The methane greenhouse gas emission control system according to claim 1, characterized in that: The model of the methane detector is HNAG900-6-G, and the threshold range of the methane detector is set to 0.5%-1.25%.

4. The methane greenhouse gas emission control system according to claim 1, characterized in that: The threshold range of the temperature detection unit is set to 20°C-42°C.

5. A methane greenhouse gas emission control method, applied to a methane greenhouse gas emission control system according to any one of claims 1 to 4, characterized in that: The specific steps include: S1. First, set the detection thresholds of the methane detector and the temperature detection unit respectively through the control panel; S2. Then, the methane concentration in the anaerobic zone at this moment is detected by the methane detector, and the temperature value in the anaerobic zone at this moment is detected by the temperature detection unit to obtain two sets of detection data at the same moment, and the two sets of detection data are uploaded to the controller and stored in the data storage module. Then, based on whether the temperature value and methane concentration in the anaerobic zone at this moment exceed the detection threshold, it is determined whether methane has entered the methane emission processing module; S3. If the temperature and methane concentration in the anaerobic zone exceed the detection threshold, the methane enters the methane emission treatment module; If the methane concentration in the anaerobic zone exceeds the detection threshold and the temperature value in the anaerobic zone does not exceed the detection threshold, the methane enters the methane emission processing module; If the temperature and methane concentration in the anaerobic zone do not exceed the detection threshold at this time, the methane does not enter the methane emission treatment module; If the temperature value in the anaerobic zone exceeds the detection threshold and the methane concentration does not exceed the detection threshold, the methane enters the methane emission processing module.

6. The method for controlling methane greenhouse gas emissions according to claim 5, characterized in that: Said S3 specifically includes: If the temperature and methane concentration in the anaerobic zone exceed the detection threshold at this time, the controller controls the exhaust valve to be in an open state and the recovery valve to be in a closed state, so that the methane is discharged into the methane emission unit; If the methane concentration in the anaerobic zone exceeds the detection threshold and the temperature value in the anaerobic zone does not exceed the detection threshold at this time, the controller controls the recovery valve to be in an open state and the exhaust valve to be in a closed state, so that the methane is discharged into the methane recovery and utilization unit, and the methane is added to the combustion chamber in multiple times, and then the electric spark heating component is controlled to ignite the methane in the combustion chamber to heat the anaerobic zone until the temperature value of the anaerobic zone reaches the detection threshold of the temperature detection unit; If the temperature and methane concentration in the anaerobic zone do not exceed the detection threshold at this time, the controller controls the exhaust valve and the recovery valve to be in a closed state, so that methane does not enter the methane emission treatment module; If the temperature in the anaerobic zone exceeds the detection threshold and the methane concentration does not exceed the detection threshold, the controller controls the exhaust valve to be in an open state and the recovery valve to be in a closed state, so that methane is discharged into the methane emission unit.

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