CN112628610B - Method and system for detecting leakage of aerobic repair gas pumping and injecting pipeline of refuse landfill - Google Patents
Method and system for detecting leakage of aerobic repair gas pumping and injecting pipeline of refuse landfill Download PDFInfo
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- CN112628610B CN112628610B CN202011207072.5A CN202011207072A CN112628610B CN 112628610 B CN112628610 B CN 112628610B CN 202011207072 A CN202011207072 A CN 202011207072A CN 112628610 B CN112628610 B CN 112628610B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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Abstract
The invention belongs to the technical field of aerobic remediation of a refuse landfill, and particularly provides a method and a system for detecting leakage of an aerobic remediation gas pumping and injecting pipeline of the refuse landfill. The problem that positive pressure leakage detection cannot be performed due to the fact that the air guide floral tube is communicated with the outside after the pipeline is installed can be solved, and the operability is high; the requirement on the performance of equipment is low; the state of the pipeline can be effectively judged, and the state of the pipeline is confirmed; the pipeline leakage detection method has the advantages that short time can be spent under the condition that a small amount of personnel are invested, the position of a pipeline with problems can be accurately positioned, and the pipeline leakage detection is realized.
Description
Technical Field
The invention belongs to the technical field of aerobic remediation of a refuse landfill, and particularly relates to a method and a system for detecting leakage of an aerobic remediation gas pumping and injecting pipeline of the refuse landfill.
Background
The aerobic repairing technology for refuse landfill is to set gas and liquid pumping and injecting system in the landfill body, inject air into the landfill body and to recharge the collected leachate and other liquid to the landfill body, so that the organic matter in the landfill body is degraded quickly under the action of aerobic microbe under the condition of proper oxygen content, temperature and humidity, and the time for decomposing refuse is shortened. Meanwhile, gases such as carbon dioxide and the like in the garbage pile are removed through the extraction well, and water vapor and heat generated by aerobic reaction are brought out. Compared with the field sealing repair technology, the aerobic repair technology of the refuse landfill has the following advantages: 1. the stabilization time of the garbage pile is accelerated; 2. the influence of the refuse landfill on the environment is reduced; 3. the operation and maintenance cost of the refuse landfill is reduced.
At present, research related to the aerobic remediation technology of the domestic refuse landfill mainly focuses on the influence of different operating conditions on the aerobic accelerated stabilization effect, most of the research is laboratory simulation, although the technological research starts earlier, the engineering application starts only in recent years, and a great amount of engineering problems are brought to be solved urgently. When the gas pumping and injecting system is constructed, a large number of gas conveying pipelines need to be arranged in a landfill, the gas pumping and injecting pipelines can be damaged by the construction of other project branches, and meanwhile, the water vapor carried by the landfill gas pumped from the garbage stack body in winter can be condensed on the pipelines to cause pipeline blockage. The gas pumping and injecting system is a core technology for accelerating the stability of a garbage pile body, a gas pipeline is buried underground or in a well, the gas pipeline cannot be pressed and detected after the pipeline installation is finished due to the particularity of the pipeline installation construction, and the system is difficult to continuously and effectively operate due to the fact that leakage detection repair is usually performed after damage and blockage due to the fact that a large amount of time and manpower are required to be invested, the construction period and the effect of aerobic repair of a landfill site are influenced, and the gas pumping and injecting system becomes the primary problem of restricting the acceleration and the stabilization of the garbage landfill site.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method and a system for detecting the leakage of an aerobic repair gas pumping and injecting pipeline of a refuse landfill, which have the advantages of simple structure and low cost.
Therefore, the invention provides a method for detecting the leakage of an aerobic repair gas pumping and injecting pipeline of a refuse landfill, which comprises the following steps:
s1: detecting leakage of the main gas pipeline; specifically, firstly, closing a pipeline valve of a gas gathering station, applying pressure to a main pipeline through an air compressor, and reading a pressure gauge at the tail end of the main pipeline of gas after a period of time;
s2: detecting leakage of a pipeline of a gas collecting station; specifically, after the main pipeline is qualified by leak detection, opening a gas gathering station pipeline valve and all branch pipeline valves connected with the gas gathering station pipeline valve each time, applying negative pressure to the main pipeline, stopping applying pressure after a period of time, observing the reading change of a pressure gauge of the gas gathering station, and simultaneously connecting a portable methane detector into a reserved detection hole of the gas gathering station to read methane;
s3: detecting leakage of the gas branch pipeline; specifically, for branch pipelines connected with problematic gas collecting stations, a gas collecting station power valve and a branch pipeline valve connected with the gas collecting station power valve are opened each time, negative pressure is applied to a main pipeline, the pressure application is stopped after a period of time, and the reading change of a branch pipeline pressure gauge is observed;
s4: determining the pipeline damage and blockage positions; and the constructor carries out field investigation by combining the operation conclusion of the previous three steps, and the gas pumping and injecting pipeline with problems can be accurately positioned.
Preferably, the S1 specifically includes: and applying 3.0Mpa pressure to the main pipeline through an air compressor, and reading a pressure gauge at the tail end of the main pipeline after 30 min.
Preferably, S1 specifically includes: if the reading of the pressure gauge is basically kept unchanged, the main gas pipeline is not damaged or blocked, namely qualified; if the pressure reading changes by more than 2%, the gas main pipeline is indicated to have a gas leakage phenomenon, namely unqualified.
Preferably, the S2 specifically includes: and (3) applying a pressure of-2.0 Mpa to the main pipeline through the axial flow fan, closing the axial flow fan after the internal pressure of the pipeline is stable after 15min, and observing the reading change of the pressure gauge of the gas gathering station.
Preferably, the S2 specifically includes:
if the reading of the pressure gauge rises uniformly, the reading of the methane detector is consistent with the data measured by the air extraction test, which indicates that the pipeline of the gas collecting station and the branch pipeline connected with the pipeline are not damaged or blocked;
if the reading of the pressure gauge rises quickly, the reading of the methane detector is almost zero, which indicates that the gas gathering station pipeline or the connected branch pipeline is damaged;
if the reading of the pressure gauge is kept unchanged, the reading of the methane detector is zero, which indicates that the gas gathering station pipeline or the connected branch pipeline is blocked.
Preferably, the S3 specifically includes: applying a pressure of-2.0 Mpa to the main pipeline through the axial flow fan, after the internal pressure of the pipeline is stable after 15min, closing the axial flow fan, and observing the reading change of a branch pipeline pressure gauge.
Preferably, the S3 specifically includes:
if the reading of the pressure gauge rises slowly and uniformly, the branch pipeline connected with the gas gathering station is not damaged or blocked;
if the reading of the pressure gauge rises quickly, the phenomenon that a branch pipeline connected with the gas gathering station is damaged is indicated;
if the reading of the pressure gauge is kept unchanged, the phenomenon that a branch pipeline connected with the gas gathering station is blocked is indicated.
The invention also provides a system for detecting the leakage of the aerobic repair gas pumping and injecting pipeline of the refuse landfill, which adopts the method for detecting the leakage of the aerobic repair gas pumping and injecting pipeline of the refuse landfill to detect the leakage of the pipeline and comprises an air compressor, an axial flow fan and a pressure gauge;
the air compressor is used for applying pressure to the pipeline;
the axial flow fan is used for applying negative pressure to the pipeline;
the pressure gauge is used for reading the pressure of the pipeline in real time.
The invention has the beneficial effects that: the method and the system for detecting the leakage of the aerobic repair gas pumping and injecting pipeline of the refuse landfill provided by the invention comprise the steps of detecting the leakage of a main gas pipeline, detecting the leakage of a pipeline of a gas gathering station, detecting the leakage of a branch gas pipeline, and carrying out field investigation by constructors according to the previous three steps of operation conclusions, namely accurately positioning the gas pumping and injecting pipeline with problems. The problem that positive pressure leakage detection cannot be performed due to the fact that the air guide floral tube is communicated with the outside after the pipeline is installed can be solved, and the operability is high; the requirement on the performance of equipment is low; the state of the pipeline can be effectively judged, and the state of the pipeline is confirmed; the pipeline leakage detection method has the advantages that short time can be spent under the condition that a small amount of personnel are invested, the position of a pipeline with problems can be accurately positioned, and the pipeline leakage detection is realized.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic flow chart of the method and system for detecting leakage of an aerobic remediation gas pumping and injecting pipeline of a refuse landfill according to the invention;
FIG. 2 is a schematic diagram of the structure of a gas pumping and injecting system of the method and the system for detecting the leakage of the aerobic remediation gas pumping and injecting pipeline of the refuse landfill.
Description of reference numerals: 1. the gas injection system comprises an extraction well, 2, a gas injection well, 3, a gas branch pipeline, 4, a gas main pipeline, 5, a gas collecting station, 6, a branch pipeline valve, 7, a gas collecting station pipeline valve, 8, an extraction fan, 9, a gas injection fan, 10 and a gas treatment system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a method for detecting leakage of an aerobic repair gas pumping and injecting pipeline of a landfill, including the following steps:
s1: detecting leakage of the main gas pipeline 4; specifically, firstly, closing a pipeline valve 7 of the gas collecting station, applying pressure to a main pipeline through an air compressor, and reading a pressure gauge at the tail end of the main gas pipeline 4 after a period of time;
s2: detecting the leakage of a pipeline of the gas collecting station 5; specifically, after the main pipeline is qualified by leak detection, opening a gas gathering station pipeline valve 7 and all branch pipeline valves 6 connected with the gas gathering station pipeline valve every time, applying negative pressure to the main pipeline, stopping applying pressure after a period of time, observing the reading change of a pressure gauge of the gas gathering station 5, and simultaneously connecting a portable methane detector into a reserved detection hole of the gas gathering station 5 to read methane;
s3: detecting leakage of the gas branch pipeline 3; specifically, for branch pipelines connected with the gas gathering stations 5 with problems, opening a gas gathering station 5 valve and a branch pipeline valve 6 connected with the gas gathering station each time, applying negative pressure to the main pipeline, stopping applying pressure after a period of time, and observing the reading change of a branch pipeline pressure gauge;
s4: determining the pipeline damage and blockage positions; and the constructor combines the operation conclusion of the previous three steps to carry out on-site investigation, and the gas pumping and injecting pipeline with problems can be accurately positioned.
Specifically, the method consists of 4 steps.
Step 1: and detecting leakage of the main gas pipeline 4. Firstly, closing a pipeline valve 7 of the gas collecting station, applying 3.0Mpa pressure to a main pipeline through an air compressor, and reading a pressure gauge at the tail end of the main gas pipeline 4 after 30 min. There are 2 cases as follows: (1) the reading of the pressure gauge is basically kept unchanged, which indicates that the gas main pipeline 4 is not damaged or blocked; (2) the pressure reading change is more than 2%, which indicates that the gas main pipeline 4 has gas leakage.
Step 2: and (5) detecting the leakage of the pipeline of the gas gathering station. And after the main pipeline is qualified by leak detection, opening 1 gas gathering station pipeline valve 7 and all branch pipeline valves 6 connected with the gas gathering station pipeline valve every time, and performing the following operations until all gas gathering stations 5 finish leak detection. And applying a pressure of-2.0 MPa to the main pipeline through the axial flow fan, closing the axial flow fan after the internal pressure of the pipeline is stable after about 15min, observing the reading change of a pressure gauge of the gas gathering station 5, and simultaneously connecting the portable methane detector into a reserved detection hole of the gas gathering station 5 to read methane. There are 3 cases as follows: (1) the reading of the pressure gauge rises slowly and uniformly, the reading of the methane detector is basically consistent with the data measured by the air extraction test, and the gas gathering station 5 pipeline and the branch pipeline connected with the pipeline are not damaged or blocked; (2) the reading of the pressure gauge rises fast, the reading of the methane detector is almost zero, and the phenomenon that the pipeline of the gas gathering station 5 or the connected branch pipeline is damaged is shown; (3) the reading of the pressure gauge is kept unchanged, and the reading of the methane detector is zero, which indicates that the pipeline of the gas gathering station 5 or the connected branch pipeline has the blockage phenomenon.
And 3, step 3: and detecting leakage of the gas branch pipeline 3. For branch pipelines connected with the gas gathering station 5 with problems, 1 gas gathering station 5 valve and 1 branch pipeline valve 6 connected with the gas gathering station 5 are opened each time, and the following operations are carried out until all branch pipelines of the gas gathering station 5 complete leakage detection. Applying-2.0 Mpa pressure to the main pipeline through the axial flow fan, closing the axial flow fan after the internal pressure of the pipeline is stable after about 15min, and observing the reading change of a branch pipeline pressure gauge. There are 3 cases as follows: (1) the rising speed of the reading of the pressure gauge is slow and uniform, which indicates that the branch pipe connected with the gas gathering station 5 is not damaged or blocked; (2) the reading of the pressure gauge rises quickly, which shows that the branch pipeline connected with the gas gathering station 5 is damaged; (3) the reading of the pressure gauge is kept unchanged, which shows that the branch pipe connected with the gas collecting station 5 is blocked.
And 4, step 4: and determining the positions of pipeline breakage and blockage. Through the first three steps of operation, the leak detection range of the pipeline is greatly reduced, and constructors can quickly and accurately locate the gas pumping and injecting pipeline with problems by combining the conclusions and carrying out on-site investigation.
The aerobic repairing technology for refuse landfill is to set gas pumping and liquid pumping and injecting system inside the landfill body to inject air into the landfill body and to re-fill collected leachate and other liquid to the landfill body to degrade the organic matter inside the landfill body fast under the action of aerobic microbe in proper oxygen content, temperature and humidity condition and to shorten the garbage decomposing period. Meanwhile, gases such as carbon dioxide and the like in the garbage pile are removed through the extraction well 1, and water vapor and heat generated by aerobic reaction are brought out. Compared with the field sealing repair technology, the aerobic repair technology of the refuse landfill has the following advantages: 1. the stabilization time of the garbage pile is accelerated; 2. the influence of the refuse landfill on the environment is reduced; 3. the operation and maintenance cost of the refuse landfill is reduced.
As shown in fig. 1 and fig. 2, an embodiment of the present invention further provides a system for detecting leakage of an aerobic repair gas pumping and injecting pipeline of a landfill, where the system performs pipeline leakage detection by using the method for detecting leakage of an aerobic repair gas pumping and injecting pipeline of a landfill, and includes an air compressor, an axial flow fan, and a pressure gauge; the air compressor is used for applying pressure to the pipeline; the axial flow fan is used for applying negative pressure to the pipeline; the pressure gauge is used for reading the pressure of the pipeline in real time.
Specifically, the pumping and injecting system is composed of an extraction well 1, a gas injection well 2, a gas branch pipeline 3, a gas main pipeline 4, a gas collecting station 5, a branch pipeline valve 6, a gas collecting station pipeline valve 7, an extraction fan 8, a gas injection fan 9 and a gas treatment system 10.
After the installation of the gas pumping and injecting pipeline is completed, a gas collecting station pipeline valve 7 is closed, 2.0-3.0 Mpa pressure is applied to the main pipeline 4 through an air compressor, the reading of a pressure gauge at the tail end of the gas main pipeline 4 is carried out after 30min, the reading of the pressure gauge is basically kept unchanged, no gas leakage occurs in the gas main pipeline 4, and then the gas collecting station 5 is subjected to leak detection. Opening a gas gathering station pipeline valve 7 and all branch pipeline valves 6 connected with the gas gathering station pipeline valve 7, applying pressure of-1.5 MPa to-2.0 MPa to the main pipeline 4 through an axial flow fan, closing the axial flow fan after about 15min when the internal pressure of the pipeline is stable, observing the reading change of a pressure gauge of the gas gathering station 5, and simultaneously connecting a portable methane detector into a reserved detection hole of the gas gathering station 5 to read methane. The pressure gauge reading rises faster and the methane detector reading is almost zero, so that the gas branch pipe 3 is further subjected to leak detection. And (3) applying a pressure of-1.5 MPa to-2.0 MPa to the main pipeline 4 through the axial flow fan, closing the axial flow fan after the internal pressure of the pipeline is stable after about 15min, and observing the reading change of a pressure gauge of the branch pipeline. The slow and even rising speed of the reading of the pressure gauge is found, which shows that the gas main pipeline 4, the gas gathering station 5 and the branch pipelines connected with the gas main pipeline do not have damage and blockage.
After the installation of the gas pumping and injecting pipeline is completed, a gas collecting station pipeline valve 7 is closed, 2.0-3.0 Mpa pressure is applied to the main pipeline 4 through an air compressor, the reading of a pressure gauge at the tail end of the gas main pipeline 4 is carried out after 30min, the reading of the pressure gauge is basically kept unchanged, no gas leakage occurs in the gas main pipeline 4, and then the gas collecting station 5 is subjected to leak detection. Opening a gas gathering station pipeline valve 7 and all branch pipeline valves 6 connected with the gas gathering station pipeline valve 7, applying pressure of-1.5 MPa to-2.0 MPa to the main pipeline 4 through an axial flow fan, closing the axial flow fan after about 15min when the internal pressure of the pipeline is stable, observing the reading change of a pressure gauge of the gas gathering station 5, and simultaneously connecting a portable methane detector into a reserved detection hole of the gas gathering station 5 to read methane. The pressure gauge reading rises faster and the methane detector reading is almost zero, so that the gas branch pipe 3 is further subjected to leak detection. And (3) applying a pressure of-1.5 MPa to-2.0 MPa to the main pipeline 4 through the axial flow fan, closing the axial flow fan after the internal pressure of the pipeline is stable after about 15min, and observing the reading change of a pressure gauge of the branch pipeline. And when the reading of the pressure gauge is increased to the standard atmospheric pressure within 1min, the phenomenon that the branch pipeline connected with the gas gathering station 5 is damaged is shown, and site construction personnel are arranged to perform detailed investigation on the branch pipeline to confirm the position of the damaged point.
The difference between the invention and the prior art is that the invention has the following advantages:
1. the negative pressure leak detection method for the gas gathering station pipeline and the gas branch pipeline can solve the problem that positive pressure leak detection cannot be performed due to the fact that the gas guide floral tube is communicated with the outside after the pipeline is installed, and is high in operability.
2. The gas gathering station pipeline and gas branch pipeline negative pressure leak detection method provided by the invention can overcome the problem that the pressure of the existing positive pressure leak detection equipment cannot meet the leak detection requirement, and has low requirement on the equipment performance.
3. The method for combining the pressure gauge with the reading of the methane detector can effectively judge the state of the pipeline and confirm the state of the pipeline.
4. The gas pumping and injecting pipeline leakage detecting method provided by the invention can spend short time and accurately position the position of a pipeline with problems under the condition of inputting a small amount of personnel, thereby realizing pipeline leakage detection.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (4)
1. A method for detecting leakage of an aerobic repair gas pumping and injecting pipeline of a refuse landfill is characterized by comprising the following steps:
s1: detecting leakage of the main gas pipeline; specifically, firstly, closing a pipeline valve of a gas gathering station, applying pressure to a main pipeline through an air compressor, and reading a pressure gauge at the tail end of the main pipeline of gas after a period of time; specifically, 3.0Mpa pressure is applied to the main pipeline through an air compressor, and a pressure gauge at the tail end of the main pipeline is read after 30 min; if the reading of the pressure gauge is basically kept unchanged, the main gas pipeline is not damaged or blocked, namely qualified; if the pressure reading change is more than 2%, indicating that the gas main pipeline has a gas leakage phenomenon, namely unqualified;
s2: detecting leakage of a gas gathering station pipeline; specifically, after the main pipeline is qualified by leak detection, opening a gas gathering station pipeline valve and all branch pipeline valves connected with the gas gathering station pipeline valve each time, applying negative pressure to the main pipeline, stopping applying pressure after a period of time, observing the reading change of a pressure gauge of the gas gathering station, and simultaneously connecting a portable methane detector into a reserved detection hole of the gas gathering station to perform methane reading;
specifically, an axial flow fan is used for applying pressure of-2.0 MPa to the main pipeline, after the internal pressure of the pipeline is stable after 15min, the axial flow fan is closed, and the reading change of a pressure gauge of the gas gathering station is observed;
if the reading of the pressure gauge rises uniformly, the reading of the methane detector is consistent with the data measured by the air extraction test, which indicates that the gas gathering station pipeline and the branch pipeline connected with the gas gathering station pipeline are not damaged or blocked;
if the reading of the pressure gauge rises quickly, the reading of the methane detector is almost zero, which indicates that the gas gathering station pipeline or the connected branch pipeline is damaged;
if the reading of the pressure gauge is kept unchanged, the reading of the methane detector is zero, which indicates that the gas gathering station pipeline or the connected branch pipeline is blocked;
s3: detecting leakage of the gas branch pipeline; specifically, for branch pipelines connected with the gas gathering stations with problems, a gas gathering station power valve and a branch pipeline valve connected with the gas gathering station power valve are opened each time, negative pressure is applied to the main pipeline, the pressure application is stopped after a period of time, and the reading change of a branch pipeline pressure gauge is observed;
s4: determining the pipeline damage and blockage positions; and the constructor carries out field investigation by combining the operation conclusion of the previous three steps, and the gas pumping and injecting pipeline with problems can be accurately positioned.
2. The method for detecting the leakage of the aerobic rehabilitation gas pumping and injecting pipeline in the refuse landfill according to claim 1, wherein the step S3 specifically comprises the following steps: applying-2.0 Mpa pressure to the main pipeline through the axial flow fan, closing the axial flow fan after the internal pressure of the pipeline is stable after 15min, and observing the reading change of a branch pipeline pressure gauge.
3. The method for detecting the leakage of the aerobic repair gas pumping and injecting pipeline in the refuse landfill according to claim 1, wherein the step S3 specifically comprises the following steps:
if the reading of the pressure gauge rises slowly and uniformly, the branch pipeline connected with the gas gathering station is not damaged or blocked;
if the reading of the pressure gauge rises quickly, the phenomenon that a branch pipeline connected with the gas gathering station is damaged is indicated;
if the reading of the pressure gauge is kept unchanged, the phenomenon that a branch pipeline connected with the gas gathering station is blocked is shown.
4. The utility model provides a landfill aerobic repair gas pump injection pipeline leak hunting system which characterized in that: the system adopts the method for detecting the leakage of the aerobic repair gas pumping and injecting pipeline of the refuse landfill according to any one of claims 1 to 3, and comprises an air compressor, an axial flow fan and a pressure gauge;
the air compressor is used for applying pressure to the pipeline;
the axial flow fan is used for applying negative pressure to the pipeline;
the pressure gauge is used for reading the pressure of the pipeline in real time.
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| CN102284466A (en) * | 2011-05-06 | 2011-12-21 | 深圳相控科技股份有限公司 | Method and system for integrated treatment and recycling of domestic garbage landfill |
| CN204756462U (en) * | 2015-07-02 | 2015-11-11 | 浙江大唐国际绍兴江滨热电有限责任公司 | Natural gas power buries factory site natural gas line and leaks measuring device |
| CN206747243U (en) * | 2017-04-17 | 2017-12-15 | 广东博海昕能环保有限公司 | A kind of MSW Incineration Plant garbage pool vacuum control system |
| CN211426436U (en) * | 2020-01-10 | 2020-09-04 | 西安迈晨仪器设备有限公司 | Hand-held type methane detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102518947A (en) * | 2011-12-06 | 2012-06-27 | 北京大方科技有限责任公司 | Real-time monitoring method for urban pipeline network leakage |
| CN109798151A (en) * | 2019-01-07 | 2019-05-24 | 中国矿业大学 | A kind of method of intellectual monitoring methane gas extraction pipeline operation conditions |
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