Methane gas dynamic monitoring and processing system in sewage collection system and operation method

Abstract

The application provides a kind of methane gas dynamic monitoring and processing system and operating method in sewage collection system, the system mainly includes monitoring-purification integrated device and central control room, the former operates in sewage pipe network, real-time monitoring is carried out to methane gas in pipe network, and data is sent to central control room, after the amount of methane gas is over standard, central control room receives signal and opens purification device through calculation, realizes the absorption treatment of over standard methane, completes ectopic treatment purification.Meanwhile, central control room can realize the accurate tracing of methane gas generation according to the data sent by each monitoring-purification integrated device, so as to provide basis for exploring the reason of methane over standard.The application carries out intelligent monitoring through monitoring-purification integrated device, calculates the amount of methane in pipeline, and carries out treatment and purification, while the accurate tracing of methane gas can be realized, so as to purify sewage pipe network, prevent methane gas in pipe network from being over standard, and affect the surrounding environment.

Description

Technical Field

[0001] This invention belongs to the field of environmental protection and water treatment, and specifically relates to an automatic synchronous detection and off-site collaborative treatment system and operation method for sediments and exhaust gas in urban sewage pipe networks. Background Technology

[0002] Due to their long construction history and lack of maintenance, many drainage pipelines suffer from structural and functional defects, resulting in significant water and gas leakage. Therefore, the current lack of reliable monitoring methods, sufficient data, and definitive emission factors for quantitatively calculating methane emissions from drainage pipelines poses a challenge to comprehensive carbon emission measurement within drainage systems. Thus, there is a need to invent a device capable of quantitatively calculating methane gas in sewage networks while simultaneously achieving efficient purification, thereby cleansing the sewage network and protecting the surrounding environment.

[0003] Chinese patent application CN202210225109.X, entitled "Apparatus and Method for Measuring Gas-Phase Methane in Sewage Pipelines," discloses an apparatus and method for measuring gas-phase methane in sewage pipelines, relating to the field of municipal drainage testing technology. It includes a dehumidification chamber, an infrared methane sensor, and a PLC controller. The dehumidification chamber and infrared methane sensor are located at the top of the sewage pipeline, while the PLC controller is located outside the pipeline. A methane sensor inlet channel is provided between the dehumidification chamber and the infrared methane sensor, with a first valve on the inlet channel. The dehumidification chamber has a gas inlet at the bottom and a gas outlet on the side. Silica gel desiccant is provided inside the dehumidification chamber, and a heating chip is attached to the probe of the infrared methane sensor. The apparatus and method for measuring gas-phase methane provided by this invention effectively reduces the humidity of the gas to be measured by using a dehumidification chamber containing silica gel desiccant before measuring the gas-phase methane, and further dehumidifies the gas by using an infrared methane sensor with a heating chip, thus ensuring accurate and reliable methane measurement results. This device can only measure the amount of methane gas and has no purification function, so it is not suitable for practical use.

[0004] Chinese patent application CN202221459738.0, entitled "An Intelligent Odor Collection Device for Sewage Pipeline Networks," discloses an intelligent odor collection device for sewage pipeline networks, belonging to the field of sewage pipeline technology. It includes an intermediate pipe, an extraction pipe fixedly welded to the top of the intermediate pipe, and an extension pipe integrally welded above the extraction pipe. The top of the intermediate pipe also has an integrally welded protrusion. A threaded rod is provided inside the protrusion, with sliding rods symmetrically positioned at both ends of the threaded rod and a lifting plate threaded onto the threaded rod. The lifting plate is slidably mounted on the two sliding rods at both ends. A pressure sensor is located below the lifting plate within the cavity of the intermediate pipe. A controller is installed on the outer wall of the extraction pipe, and an extraction fan is installed inside the cavity of the extraction pipe. Both the pressure sensor and the extraction fan are electrically connected to the controller. A dustproof net is horizontally inserted inside the extraction pipe. This intelligent odor collection device for sewage pipeline networks avoids prolonged high-speed operation of the extraction fan, thus extending its lifespan. This invention can effectively remove methane gas from sewage pipe networks, but it has high energy consumption, limited applicability, and cannot be applied to large-scale urban sewage pipe networks, which can easily lead to resource waste.

[0005] Chinese patent application CN202020676686.7, entitled "A Harmless Removal Device for Harmful Gases in Municipal Drainage Pipes," discloses a device for the harmless removal of harmful gases in municipal drainage pipes. The device includes a housing with an outlet pipe, a drive motor, a first air pump, and a second air pump. The first air pump has a harmful gas inlet pipe, and the second air pump has an air inlet pipe. Both the first and second air pumps have horizontal pipes with outlet holes. The housing contains a high-voltage electrode and a rotating rod connected to the drive motor. The rotating rod has threaded grooves and a T-shaped plate with a slip ring. Brush bristles are evenly fixed to the inner wall of the slip ring along its circumference. The device uses the drive motor to rotate the rotating rod, which in turn moves the T-shaped plate synchronously through the symmetrically arranged threaded grooves. The T-shaped plate moves the slip ring, which in turn moves the brush bristles, allowing them to remove dust from the high-voltage electrode. This prevents dust accumulation on the high-voltage electrode and ensures its continued use. However, this invention has high production costs, complex processes, and limited applicability, and cannot achieve efficient treatment of methane gas in sewage pipe networks. Summary of the Invention

[0006] Purpose of the invention: In order to overcome the shortcomings of the prior art, the present invention provides a dynamic monitoring and treatment system for methane gas in a sewage collection system and its operation method. It can intelligently monitor through an integrated monitoring-purification device, calculate the amount of methane in the pipeline, and treat and purify it. At the same time, it can achieve accurate source tracing of methane gas, thereby purifying the sewage pipe network and preventing methane gas from exceeding the standard in the pipe network and affecting the surrounding environment.

[0007] Technical solution: The objective of this invention is achieved through the following technical means:

[0008] The system mainly consists of an integrated monitoring-purification device and a central control room. The former operates within the sewage pipe network, monitoring methane gas in the network in real time and sending the data to the central control room. When the methane gas level exceeds the standard, the central control room receives the signal and, through calculation, activates the corresponding number of purification devices to absorb and treat the excess methane, completing the off-site purification process. Simultaneously, the central control room can accurately trace the source of methane gas generation based on data sent from each integrated monitoring-purification device, thus providing a basis for investigating the causes of methane exceeding the standard. Details are as follows:

[0009] Step 1: First, number each pipe section and sewage well. Based on the different uses of the pipes, they are divided into sewage trunk lines 1-2, sewage branch lines 1-3, and sewage branch lines 1-4, and numbered G respectively. i G j-i G m-j-i Depending on the type of pipeline installed, the sewage wells on sewage main 1-2 are numbered W. i Similarly, the sewage wells on sewage branch pipes 1-3 and 1-4 are numbered W respectively. j-i W m-j-i .

[0010] For sewage branch pipes 1-4, starting from the end, a monitoring-purification integrated device 6-1 is installed at every other sewage well. For sewage main pipes 1-2 and sewage branch pipes 1-3, a monitoring-purification integrated device 6-1 is installed at each inspection well. Each monitoring-purification integrated device 6-1 sends monitoring data to the central control room 7.

[0011] Step 2: The integrated monitoring and purification device 6-1 transmits infrared signals in real time through the signal transceiver to detect the pipe diameter D and the distance H1 between the purification device 6-3 and the top of the pipe.

[0012] Then the cross-sectional area of ​​the sewage pipe

[0013] Pipe filling

[0014] Note: H2 - The total height of the purification device 6-3 and the inflatable airbag at the bottom;

[0015] H3-Support Monitoring-Purification Integrated Device 6-1 Floating Draft;

[0016] Step 3: The integrated monitoring-purification device 6-1 uses infrared transceiver 6-9 to detect the distance H4 between the stirrer and the bottom of the pipe, as well as the thickness H5 of the bottom sediment. The telescopic length is maintained at all times.

[0017] H′=α·(H4-H5)

[0018] Note: α is the safety factor, ranging from 0.75 to 0.80;

[0019] The methane in the wastewater is released into the air through agitation, and the concentration is approximately 0 g / m³. 3

[0020] Step 4: The monitoring data from the integrated monitoring and purification device 6-1 at each location is sent to the central control room 7. The central control room 7 performs classification and calculation based on the data received from different pipe numbers.

[0021] For the sewage well W on the main pipe i The transmitted data can be used to perform the following calculations:

[0022]

[0023] Note: l i - Main pipe G i The length of the pipe;

[0024] D i - Main pipe G i Pipe diameter;

[0025] G i The degree of air filling;

[0026] G i The average concentration of internal methane, where c i Indicates sewage well W i The measured methane concentration c i+1 Indicates sewage well W i+1 The measured methane concentration;

[0027] For the sewage well W on the branch pipe j-i The transmitted data can be used to perform the following calculations:

[0028]

[0029] Note: l j-i -Branch G j-i The length of the pipe;

[0030] D j-i -Branch G j-i Pipe diameter;

[0031] G j-i The degree of air filling;

[0032] G j-i The average concentration of internal methane, where cj-i Indicates sewage well W j-i The measured methane concentration, c j-i+1 Indicates sewage well W j-i+1 The measured methane concentration;

[0033] For the sewage well W on the branch pipe m-j-i The transmitted data can be used to perform the following calculations:

[0034]

[0035] Note: l m-j-i -Branch G m-j-i The length of the pipe;

[0036] D m-j-i -Branch G m-j-i Pipe diameter;

[0037] G m-j-i The degree of air filling;

[0038] G m-j-i The average concentration of internal methane, where c m-j-i Indicates sewage well W m-j-i The measured methane concentration, c m-j-i+1 Indicates sewage well W m-j-i+2 The measured methane concentration;

[0039] The amount of methane in each sewage well can be calculated as follows:

[0040]

[0041] Note: c i - Sewage well W i The measured methane concentration;

[0042] 0.7 - The side length of the cross-section of the sewage well;

[0043] H di - The depth of the sewage well;

[0044] The total amount of methane in the sewage pipe network is:

[0045] W(CH4) 总 =W(CH4) 干管 +W(CH4) 支干管 +W(CH4) 支管 +W 污水井

[0046] Step 5: When the methane concentration C>C0 monitored by the integrated monitoring-purification device 6-1, the central control room receives the concentration exceeding the standard signal and begins processing.

[0047] Step 6: The central control room locates the source of the excessive methane signal based on the received signal, pinpointing specific pipeline sections and starting to calculate the excessive methane level. Assume the detected excessive signal originates from W... t The signal transmitted by the integrated monitoring and purification device 6-1 at the location is located at G. t G (t-1) G t-1 Waiting for the pipe section.

[0048]

[0049]

[0050] W(CH4) 超标 =W(CH4) 现有 -W(CH4) 标准

[0051] Note: c0 is the maximum permissible concentration of methane gas in the sewage pipe network.

[0052] Step 7: The methane gas purification rate of the integrated monitoring-purification device 6-1 is E per hour. Assuming the process is completed within three hours, the approximate number of devices required is:

[0053] N = W(CH4) 超标 / (E·3)

[0054] Note: N takes an integer

[0055] Step 8: For W t W (t-1) W t-1 Comparison of methane concentrations

[0056] If N≤3, then the W measured by the integrated monitoring-purification device t W (t-1) W t-1 The methane concentration at each location is compared, and the purification device at the location with the higher methane concentration is activated first.

[0057] If N>3, then for W t W (t-1) W t-1 The methane concentrations in the surrounding sewage wells are compared, and the purification devices at the locations with higher methane concentrations are activated first.

[0058] Step 9: When the integrated monitoring and purification device 6-1 detects that C < β·C0, β is the methane safety factor, which is taken as 0.5 to 0.6, and the purification device is turned off.

[0059] Beneficial effects: Compared with the prior art, the advantages of this invention are:

[0060] (1) The present invention uses the integrated monitoring-purification device 6-1 to monitor the amount of methane gas in real time, thereby enabling accurate calculation of the total amount of methane gas in the sewage pipe network.

[0061] (2) The purification system designed in this invention accurately traces the source of methane concentration exceeding the standard in specific pipelines. Under the premise of ensuring the purification effect, it activates the minimum number of purification devices, which has high purification efficiency, good purification effect, is easy to operate, and has low energy consumption. It is suitable for various urban pipelines.

[0062] (3) The present invention can realize intelligent control and save labor costs. Attached Figure Description

[0063] Figure 1 This is a schematic diagram of a sewage pipe network for a dynamic monitoring and treatment system for methane gas in a sewage collection system according to the present invention.

[0064] Figure 2 This is a cross-sectional layout diagram of a dynamic monitoring and treatment system for methane gas in a wastewater collection system according to the present invention.

[0065] Figure 3 A front view of the integrated monitoring-purification device 6-1;

[0066] Figure 4 Schematic diagram of the integrated monitoring-purification device 6-1;

[0067] Figure 5 A schematic diagram of the operating principle of a dynamic monitoring and treatment system for methane gas in a sewage collection system.

[0068] In the diagram: 1-2 - Sewage trunk pipe; 1-3 - Sewage branch pipe; 1-4 - Sewage branch pipe; 1-5 - Sewage well;

[0069] 2-Sewage pipe; 3-Sediment; 4-Sewage; 5-Air inside the pipe; 7-Central control room;

[0070] 6-1-Integrated monitoring and purification device; 6-2-Intelligent monitoring sensor; 6-3-Purification device; 6-4-Telescopic stirrer; 6-5-Cable; 6-6-Central processing unit; 6-7-Signal transceiver; 6-8-Inflatable airbag; 6-9-Infrared signal transceiver. Detailed Implementation

[0071] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0072] The sewage pipe network, in a hierarchical manner, includes: sewage trunk lines, sewage branch lines, and sewage branch lines, respectively numbered G. i G j-i G m-j-iDepending on the type of pipeline, the sewage wells on the main sewage pipe, branch sewage pipe, and branch sewage pipe are numbered W respectively. i W j-i W m-j-i .

[0073] Example 1

[0074] Reference Figure 1 As shown, the sewage pipe network includes: sewage trunk line 1-2, sewage branch trunk line 1-3, and sewage branch line 1-4, which are respectively numbered G1, G2, G3, G4, G5, G6, G7, G8, G9, G1, G1, G1, G1, G2, G3, G4, G1, G1, G2, G3, G4, G5 ... j-i G m-j-i Depending on the type of pipeline installed, the sewage wells on sewage main 1-2 are numbered W1 to W2. n (In this embodiment 1, n = 4). Similarly, the sewage wells on sewage branch pipes 1-3 and 1-4 are numbered W respectively. j-1 ~W j-n W m-j-im-j-i .

[0075] Reference Figure 3-4 As shown, the integrated monitoring-purification device 6-1 includes: a central processing unit 2-6 for controlling all other components, with a signal transceiver 6-7 connected to its top for transmitting and receiving signals to and from the central control room 7; an infrared signal transceiver 6-9 for detecting the surrounding environment; a smart sensor 6-2 on the top of the integrated monitoring-purification device 6-1, connected via a cable 6-5, which transmits monitoring data to the central control room 7 via the signal transceiver 6-7; an inflatable float 6-8 around the purification device 6-3, which floats in the water when there is sufficient water in the pipeline; and a telescopic agitator 6-4 in the groove below the integrated monitoring-purification device 6-1, whose telescopic agitator 2-10 determines its telescopic length and rotation speed via the infrared signal transceiver 6-9.

[0076] Reference Figure 3 , 4As shown, a dynamic monitoring and treatment system for methane gas in a sewage collection system includes: a sewage pipeline network 1-1, a sewage well 1-5, and an integrated monitoring-purification device 6-1. The sewage well is located above the sewage pipeline network 1-1. One or more integrated monitoring-purification devices 6-1 are located within the sewage pipeline network 1-1. These devices detect pipeline parameters (such as pipe diameter, distance between the integrated monitoring-purification device and the top of the pipe, etc.), activate a telescopic agitator 6-4 to stir the sewage within the pipe, releasing the methane dissolved in the sewage. The integrated monitoring-purification device transmits the detected methane gas concentration data to a central control room 7 via a signal transceiver 6-7. The central control room 7 analyzes and processes the received data. When the methane concentration exceeds the standard, the information is sent back to the integrated monitoring-purification device, which then activates the purification device 6-3, thereby completing the calculation of the total methane gas concentration and the purification of the excess methane gas.

[0077] Reference Figure 5 As shown, a method for operating a dynamic monitoring and treatment system for methane gas in a sewage collection system includes the following steps:

[0078] Step 1: First, number each pipe section and sewage well. Based on the different uses of the pipes, they are divided into sewage trunk lines 1-2, sewage branch lines 1-3, and sewage branch lines 1-4, and numbered G respectively. i G j-i G m-j-i Depending on the type of pipeline installed, the sewage wells on sewage main 1-2 are numbered W. i Similarly, the sewage wells on sewage branch pipes 1-3 and 1-4 are numbered W respectively. j-i W im-j-i .

[0079] For sewage branch pipes 1-4, starting from the end, a monitoring-purification integrated device 6-1 is installed at every other sewage well. For sewage main pipes 1-2 and sewage branch pipes 1-3, a monitoring-purification integrated device 6-1 is installed at each inspection well. Each monitoring-purification integrated device 6-1 sends monitoring data to the central control room 7.

[0080] Step 2: The integrated monitoring and purification device 6-1 transmits infrared signals in real time through the signal transceiver to detect the pipe diameter D and the distance H1 between the purification device 6-3 and the top of the pipe.

[0081] Then the cross-sectional area of ​​the sewage pipe

[0082]

[0083] Note: H2 - The total height of the purification device 6-3 and the inflatable airbag at the bottom;

[0084] H3-Support Monitoring-Purification Integrated Device 6-1 Floating Draft;

[0085] Step 3: The integrated monitoring-purification device 6-1 uses infrared transceiver 6-9 to detect the distance H4 between the stirrer and the bottom of the pipe, as well as the thickness H5 of the bottom sediment. The telescopic length is maintained at all times.

[0086] H′=α·(H4-H5)

[0087] Note: α is the safety factor, ranging from 0.75 to 0.80;

[0088] The methane in the wastewater is released into the air through agitation, at approximately 0 g / m³. 3 ;

[0089] Step 4: The monitoring data from the integrated monitoring and purification device 6-1 at each location is sent to the central control room 7. The central control room 7 performs classification and calculation based on the data with different numbers received.

[0090] For the sewage well W on the main pipe i The transmitted data can be used to perform the following calculations:

[0091]

[0092] Note: l i - Main pipe G i The length of the pipe;

[0093] D i - Main pipe G i Pipe diameter;

[0094] G i The degree of air filling;

[0095] G i The average concentration of internal methane, where c i Indicates sewage well W i The measured methane concentration, c i+1 Indicates sewage well W i+1 The measured methane concentration.

[0096] For the sewage well W on the branch pipe j-i The transmitted data can be used to perform the following calculations:

[0097]

[0098] Note: l i-j -Branch G j-i The length of the pipe;

[0099] D i-j -Branch Gj-i Pipe diameter;

[0100] G j-i The degree of air filling;

[0101] G j-i The average concentration of internal methane, where c i-j Indicates sewage well W j-i The measured methane concentration, c i-j+1 Indicates sewage well W j-i+1 The measured methane concentration.

[0102] For the data sent by the sewage well Wi on the branch pipe, the following calculations can be performed:

[0103]

[0104] Note: l i-j-m -Branch G m-j-i The length of the pipe;

[0105] D i-j-m -Branch G m-j-i Pipe diameter;

[0106] G m-j-i The degree of air filling;

[0107] G m-j-i The average concentration of internal methane, where c i-j-m Indicates sewage well W m-j-i The measured methane concentration, c i-j-m+1 Indicates sewage well W m-j-i+2 The measured methane concentration.

[0108] The amount of methane in each sewage well can be calculated as follows:

[0109]

[0110] Note: c i - Sewage well W i methane concentration;

[0111] 0.7 - The side length of the cross-section of the sewage well;

[0112] H di - The depth of the sewage well;

[0113] The total amount of methane in the sewage pipe network is:

[0114] W(CH4) 总 =W(CH4) 干管 +W(CH4)支干管 +W(CH4) 支管 +W 污水井

[0115] Step 5: When the methane concentration C>C0 monitored by the integrated monitoring-purification device 6-1, the central control room receives the concentration exceeding the standard signal and begins processing.

[0116] Step 6: The central control room locates the source of the excessive methane signal based on the received signal, pinpointing specific pipeline sections and starting to calculate the excessive methane level. Assume the detected excessive signal originates from W... t The signal transmitted by the integrated monitoring and purification device 6-1 at the location is located at G. t G (t-1) G t-1 Waiting for the pipe section.

[0117]

[0118]

[0119]

[0120] W(CH4) 超标 =W(CH4) 现有 -W(CH4) 标准

[0121] Note: c0 is the maximum permissible concentration of methane gas in the sewage pipe network.

[0122] Step 7: The methane gas purification rate of the integrated monitoring-purification device 6-1 is E per hour. Assuming the process is completed within three hours, the approximate number of devices required is:

[0123] N = W(CH4) 超标 / (E·3)

[0124] Note: N takes an integer

[0125] Step 8: If N≤3, then the W measured by the integrated monitoring-purification device... t W (t-1) W t-1 The methane concentration at each location is compared, and the purification device at the location with the higher methane concentration is activated first.

[0126] Step 9: When the integrated monitoring and purification device 6-1 detects that c < β·c0 (β is the methane safety factor, taken as 0.5 to 0.6), the purification device is turned off.

[0127] The methane gas purification in the pipeline was successfully completed.

[0128] Example 2

[0129] Step 1: First, number each pipe section and sewage well. Based on the different uses of the pipes, they are divided into sewage trunk lines 1-2, sewage branch lines 1-3, and sewage branch lines 1-4, and numbered G respectively. i G j-i G m-j-i Depending on the type of pipeline installed, the sewage wells on sewage main 1-2 are numbered W. i Similarly, the sewage wells on sewage branch pipes 1-3 and 1-4 are numbered W respectively. j-i W m-j-i .

[0130] For sewage branch pipes 1-4, starting from the end, a monitoring-purification integrated device 6-1 is installed at every other sewage well. For sewage main pipes 1-2 and sewage branch pipes 1-3, a monitoring-purification integrated device 6-1 is installed at each inspection well. Each monitoring-purification integrated device 6-1 sends monitoring data to the central control room 7.

[0131] Step 2: The integrated monitoring and purification device 6-1 transmits infrared signals in real time through the signal transceiver to detect the pipe diameter D and the distance H1 between the purification device 6-3 and the top of the pipe.

[0132] Then the cross-sectional area of ​​the sewage pipe

[0133] Pipe filling

[0134] Note: H2 - The total height of the purification device 6-3 and the inflatable airbag at the bottom;

[0135] H3-Support Monitoring-Purification Integrated Device 6-1 Floating Draft;

[0136] Step 3: The integrated monitoring-purification device 6-1 uses infrared transceiver 6-9 to detect the distance H4 between the stirrer and the bottom of the pipe, as well as the thickness H5 of the bottom sediment. The telescopic length is maintained at all times.

[0137] H′=α·(H4-H5)

[0138] Note: α is the safety factor, ranging from 0.75 to 0.80;

[0139] The methane in the wastewater is released into the air through agitation, and the concentration is approximately 0 g / m³. 3

[0140] Step 4: The monitoring data from the integrated monitoring and purification device 6-1 at each location is sent to the central control room 7. The central control room 7 performs classification and calculation based on the data with different numbers received.

[0141] For the sewage well W on the main pipei The transmitted data can be used to perform the following calculations:

[0142]

[0143] Note: l i - Main pipe G i The length of the pipe;

[0144] D i - Main pipe G i Pipe diameter;

[0145] G i The degree of air filling;

[0146] G i The average concentration of internal methane, where c i Indicates sewage well W i The measured methane concentration, c i+1 Indicates sewage well W i+1 The measured methane concentration.

[0147] For the sewage well W on the branch pipe j-i The transmitted data can be used to perform the following calculations:

[0148]

[0149] Note: l j-i -Branch G j-i The length of the pipe;

[0150] D j-i -Branch G j-i Pipe diameter;

[0151] G j-i The degree of air filling;

[0152] G j-i The average concentration of internal methane, where c j-i Indicates sewage well W j-i The measured methane concentration, c j-i+1 Indicates sewage well W j-i+1 The measured methane concentration.

[0153] For the data sent by the sewage well Wi on the branch pipe, the following calculations can be performed:

[0154]

[0155] Note: l i-j-m -Branch G m-j-i The length of the pipe;

[0156] D i-j-m -Branch G m-j-i Pipe diameter;

[0157] G m-j-i The degree of air filling;

[0158] G m-j-i The average concentration of internal methane, where c i-j-m Indicates sewage well W m-j-i The measured methane concentration, c i-j-m+1 Indicates sewage well W m-j-i+2 The measured methane concentration.

[0159] The amount of methane in each sewage well can be calculated as follows:

[0160]

[0161] Note: c i - Sewage well W i methane concentration;

[0162] 0.7 - The side length of the cross-section of the sewage well;

[0163] H di - The depth of the sewage well;

[0164] The total amount of methane in the sewage pipe network is:

[0165] W(CH4) 总 =W(CH4) 干管 +W(CH4) 支干管 +W(CH4) 支管 +W 污水井

[0166] Step 5: When the methane concentration C>C0 monitored by the integrated monitoring-purification device 6-1, the central control room receives the concentration exceeding the standard signal and begins processing.

[0167] Step 6: The central control room locates the source of the excessive methane signal based on the received signal, pinpointing specific pipeline sections and starting to calculate the excessive methane level. Assume the detected excessive signal originates from W... t The signal transmitted by the integrated monitoring and purification device 6-1 at the location is located at G. t G (t-1) G t-1 Waiting for the pipe section.

[0168]

[0169]

[0170] W(CH4) 超标 =W(CH4) 现有 -W(CH4) 标准

[0171] Note: c0 is the maximum permissible concentration of methane gas in the sewage pipe network.

[0172] Step 7: The methane gas purification rate of the integrated monitoring-purification device 6-1 is E per hour. Assuming the process is completed within three hours, the approximate number of devices required is:

[0173] N = W(CH4) 超标 / (E·3)

[0174] Note: N takes an integer

[0175] Step 8: If N>3, then for W t W (t-1) W t-1 The methane concentrations in the surrounding sewage wells are compared, and the purification devices at the locations with higher methane concentrations are activated first.

[0176] Step 9: When the integrated monitoring and purification device 6-1 detects that c < β·c0 (β is the methane safety factor, taken as 0.5 to 0.6), the purification device is turned off.

[0177] The methane gas purification in the pipeline network was successfully completed.

[0178] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of the present invention.

Claims

1. An operation method for a dynamic monitoring and treatment system for methane gas in a wastewater collection system, wherein the dynamic monitoring and treatment system for methane gas in a wastewater collection system comprises: Sewage pipe network (1-1), sewage well (2-1), integrated monitoring-purification device (6-1), central control room (7); Among them, a sewage well is opened above the sewage pipe network (1-1), and one or more monitoring-purification integrated devices (6-1) are installed below the sewage well (2-1) according to different pipe uses and set density to detect and obtain pipe parameters. The central control room (7) is built in the sewage treatment plant and maintains a signal connection with the monitoring-purification integrated device (6-1) to analyze and process the monitoring data and activate the methane gas purification device accordingly to realize the purification and total amount calculation of methane gas. The monitoring-purification integrated device (6-1) includes a central controller (6-6), and a signal transceiver device (6-7) is provided on the top of the central controller (6-6) for transmitting and receiving signals to the central control room (7) or detecting the surrounding environment. Based on the received signals, the amount of methane gas and the purification effect of the integrated monitoring-purification device (6-1) are determined. The integrated monitoring-purification device (6-1) is equipped with one or more intelligent sensors (6-2) on the top, which are connected by cables (6-5) and transmit the monitoring data to the central control room (7) through a signal transceiver (6-7). The integrated monitoring-purification device (6-1) is equipped with a telescopic agitator (6-4) at the bottom, whose speed and length are controllable, and can agitate the sewage in the pipe network. The integrated monitoring-purification device (6-1) is equipped with an infrared signal transceiver (6-9) on the top, which is used to detect the distance between the agitator and the bottom of the pipe and the thickness of the bottom sediment, so as to control the extension length of the telescopic agitator (6-4) in real time. The monitoring-purification integrated device (6-1) is equipped with inflatable floats (6-8) around its body. The monitoring-purification integrated device (6-1) floats in the water with the help of the inflatable floats (6-8). The purification device (6-3) is placed inside the inflatable floats. The main body of the monitoring-purification integrated device (6-1) is the purification device (6-3), which has an air inlet on its top for absorbing methane gas and purifying it. The central control room (7) receives the monitoring data and analyzes and processes the data. When the amount of methane exceeds the standard, the central control room calculates the amount of methane exceeding the standard and determines the number and location of the purification devices to be turned on. After the purification device (6-3) receives the turn-on signal through the signal transceiver device (6-7), the purification device (6-3) starts to work. Its features include the following steps: Step 1: First, number each pipe section and sewage well. Based on the different uses of the pipes, they are divided into sewage trunk lines, sewage branch lines, and sewage branch lines, and numbered G respectively. i G j-i G m-j-i Depending on the type of pipeline installed, the sewage wells on the main sewage pipe are numbered W. i Similarly, the sewage wells on the sewage branch pipes and the sewage main pipes are numbered W respectively. j-i W m-j-i ; For sewage branch pipe G m-j-i Starting from the very end, install an integrated monitoring and purification device (6-1) at every other sewage well; for sewage trunk line G i and sewage branch pipe G j-i Each inspection well is equipped with an integrated monitoring and purification device (6-1), and each integrated monitoring and purification device (6-1) sends monitoring data to the central control room (7). Step 2: The integrated monitoring-purification device (6-1) transmits infrared signals in real time through the signal transceiver to detect the pipe diameter D and the distance H1 between the purification device (6-3) and the top of the pipe; Then the cross-sectional area of ​​the sewage pipe ; Pipe filling ; - The total height of the purification device (6-3) and the inflatable airbag at the bottom; - Support monitoring-purification integrated device (6-1) floating draft depth; Step 3: The integrated monitoring-purification device (6-1) uses an infrared signal transceiver (6-9) to detect the distance H4 between the stirrer and the bottom of the pipe, as well as the thickness H5 of the bottom sediment. The telescopic length is maintained at all times. ； For safety, a factor of 0.75 to 0.80 is used; The methane in the wastewater is released into the air through agitation, and the amount is approximately 0 g / m³. 3 ; Step 4: The monitoring data of each point of the integrated monitoring-purification device (6-1) is sent to the central control room (7). The central control room (7) performs targeted classification calculations based on the data received from different pipe numbers. For the sewage well W on the main pipe i The transmitted data can be used to perform the following calculations: ； - Main pipe G i The length of the pipe; - Main pipe G i Pipe diameter; - Main pipe G i The degree of air filling; - Main pipe G i The average concentration of methane, of which Indicates sewage well W i The measured methane concentration, Indicates sewage well W i+1 The measured methane concentration; For the sewage well W on the branch pipe j-i The transmitted data can be used to perform the following calculations: ； In the formula: Indicates sewage well The methane concentration measured at the location; Indicates the connection between the same branch pipe and the sewage well. The methane concentration measured at the next adjacent wastewater well; This indicates the effective height of the gas phase space within the corresponding branch pipe section; -Branch G j-i The length of the pipe; -Branch G j-i Pipe diameter; -Branch G j-i The degree of air filling; -Branch G j-i The average concentration of methane within the membrane; For the sewage well W on the branch pipe m-j-i The transmitted data can be used to perform the following calculations: ； -Branch G m-j-i The length of the pipe; -Branch G m-j-i Pipe diameter; -Branch G m-j-i The degree of air filling; -Branch G m-j-i The average concentration of methane, of which Indicates sewage well W m-j-i The measured methane concentration, This indicates that the next sewage well W on the same branch pipe is equipped with an integrated monitoring and purification device. (m-j-i)+2 The measured methane concentration; The amount of methane in each sewage well can be calculated as follows: ； - Sewage well W i The measured methane concentration; - The side length of the cross-section of the sewage well; - The depth of the sewage well; The total amount of methane in the sewage pipe network is: 。 2. The operation method of the methane gas dynamic monitoring and treatment system in a sewage collection system according to claim 1, characterized in that, The steps for controlling the number and location of the purification devices to be turned on are as follows: Step 1: When the methane concentration C>C0 monitored by the integrated monitoring-purification device (6-1), the central control room receives a concentration exceeding the standard signal and begins processing; Step 2: The central control room locates the source of the excessive methane signal based on the received signal, pinpointing the corresponding pipeline section and starting to calculate the excessive methane level. Assume the detected excessive signal originates from W... t The signal transmitted by the integrated monitoring and purification device (6-1) at location G is located at location G. t G t-1 Pipe section: Indicates sewage well sewage well The pipe sections between; Indicates sewage well With sewage well The pipe sections between; Indicates sewage well sewage well The pipe sections between; Correspondingly, , , and They represent sewage wells , , and The methane concentration measured at the location; + + ； + + The amount of methane exceeding the standard is calculated using the following formula: ； The maximum permissible concentration of methane gas in the sewage pipe network; Step 3: The methane gas purification rate of the integrated monitoring-purification device (6-1) is E per hour. Assuming the process is completed within three hours, the approximate number of devices required is: ； N is an integer; Step 4: For W t W t-1 Comparing the methane concentrations: like Then, the W measured by the integrated monitoring-purification device t W t-1 Compare the methane concentrations at different locations and prioritize turning on the purification device at the location with the higher methane concentration. like Then for W t W t-1 Compare the methane concentrations of surrounding sewage wells and prioritize activating the purification devices at the locations with higher methane concentrations. Step 5: When the integrated monitoring and purification device (6-1) detects that C < β· C0, where β is the methane safety factor and is taken as 0.5~0.6, the purification device is turned off.

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