CN210474944U - Gas well device for aerobic treatment of refuse landfill - Google Patents
Gas well device for aerobic treatment of refuse landfill Download PDFInfo
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- CN210474944U CN210474944U CN201921280669.5U CN201921280669U CN210474944U CN 210474944 U CN210474944 U CN 210474944U CN 201921280669 U CN201921280669 U CN 201921280669U CN 210474944 U CN210474944 U CN 210474944U
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Abstract
The utility model discloses a gas well device that is used for rubbish landfill good oxygen to administer, include: the well casing and the connecting piece that communicate each other, the connecting piece sets up in the well casing top, and the top of connecting piece is sealed, is equipped with the air duct on the lateral wall of connecting piece, offers the air vent on the lateral wall of well casing. The gas well device is simple in structure and convenient to process, can be quickly installed, connected and detached in the aerobic treatment project of the landfill site through conventional machines, overcomes the complex operations of drilling down pipes and the like in the traditional aerobic process, realizes efficient connection with the subsequent ex-situ mining process units, greatly saves the construction and installation cost and the construction period, and is beneficial to promoting the development of the landfill site treatment technical field.
Description
Technical Field
The utility model belongs to the landfill rubbish administers the field, more specifically relates to a gas well device that is used for good oxygen to administer in landfill yard.
Background
For a long time, landfill is the main mode of domestic waste disposal in China, but the secondary pollution and the adjacent effect are more and more serious. The reason is mainly that the degradation rate of organic matters in the landfill garbage is slow under the anaerobic environment, the stabilization period of the organic matters is usually 30-50 years, and a large amount of leachate, foul smell and other harmful gases are generated during the stabilization period, so that the environmental pollution and the exposed population are seriously threatened. Aiming at the problems, the combined process of aerobic ventilation pretreatment and ex-situ mining provides a new technical idea for comprehensive treatment and land resource recycling of the refuse landfill. However, there is still a lack of aerobic ventilation pretreatment devices compatible with ex situ mining.
The core device of the conventional aerobic ventilation process is a gas injection and extraction well, the construction process of the conventional aerobic ventilation process mainly adopts a mode of drilling by a drilling machine and hoisting a lower pipe (generally an HDPE pipe fitting), and the attached engineering also comprises complex operations such as gravel filling, well mouth plugging and the like. Although the gas well device has good ventilation and sealing effects, the gas well device is difficult to disassemble and move once being built and needs to be kept in a garbage heap for a long time, so that the conventional aerobic ventilation method and device are difficult to be connected with a subsequent ex-situ mining process unit. In general, the disadvantages of the existing aerobic ventilation device and process can be summarized as follows: the construction steps are complicated, the construction and installation period is long, and the drilling cost is high; the well pipe device which is difficult to remove increases the construction difficulty of the subsequent garbage ex-situ excavation; meanwhile, the excavation operation can damage the existing well building materials, so that the secondary utilization value of the well building materials is lost. In conclusion, the existing well pipe arrangement mode greatly limits the application of the aerobic pretreatment process unit before ex-situ mining.
There is therefore a great need to develop a gas well installation for aerobic ventilation of landfill sites. The device is convenient to install and dismantle, has obvious aerobic ventilation effect, can be repeatedly utilized, and can meet the process requirements of subsequent garbage ex-situ mining construction.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simple structure, economic nature are good, repeatedly usable's gas well device to realize linking up with the high efficiency of follow-up dystopy exploitation process unit, make its aerobic ventilation preliminary treatment process that can the wide application in stock landfill dystopy exploitation technology.
In order to achieve the above object, the utility model provides a gas well device for rubbish landfill aerobic treatment, include: the well casing and the connecting piece that communicate each other, the connecting piece set up in the well casing top, the top of connecting piece is sealed, be equipped with the air duct on the lateral wall of connecting piece, set up the air vent on the lateral wall of well casing.
Preferably, the bottom of the well pipe is conical, and the well pipe is cast iron or galvanized steel pipe.
Preferably, the well pipe has a nominal diameter of 50cm to 100cm, a length of 3.5m to 5.5m, and an open-pore section length of 3.0m to 5.0 m.
Preferably, the aperture of the vent holes is 6mm-10mm, the vent holes are arranged in rows on the side wall of the well pipe, the interval between every two adjacent vent holes in each row of the vent holes is 10cm-20cm, and the vent holes in every two adjacent rows are arranged in a staggered mode.
Preferably, the side wall of the gas guide pipe is provided with a gas collecting valve, and the end part of the gas guide pipe is provided with a connecting flange.
Preferably, the gas collection valve is a ball valve.
Preferably, the top end of the connecting piece is provided with a threaded hole for installing a monitoring probe, and the top of the connecting piece is provided with an H-shaped top cap.
Preferably, the monitoring probes comprise a gas pressure monitoring probe, a gas temperature monitoring probe and a gas humidity monitoring probe.
Preferably, the H-shaped top cap is made of cast iron or galvanized steel.
Preferably, the material of the connecting piece is cast iron or galvanized steel.
An aerobic treatment method for a refuse landfill, which comprises the following steps:
1) arranging a plurality of gas well devices for the aerobic treatment of the landfill site in a grid manner in a garbage pile body, and completely inserting well pipes of the gas well devices into the garbage pile body;
2) connecting one part of gas well devices to an air extraction pipeline to be used as an air extraction well, and connecting the other part of gas well devices to an air injection pipeline to be used as an air injection well, wherein the air extraction well and the air injection well are arranged at intervals;
3) and starting the aerobic ventilation system, and monitoring the landfill gas component of the extraction well through the gas guide pipe.
Preferably, the gas well device is connected to the gas injection pipeline or the gas extraction pipeline through the gas guide pipe, and a manual butterfly valve is arranged between the gas guide pipe and the gas injection pipeline or the gas extraction pipeline.
Preferably, a plurality of gas well devices are arranged in the garbage heap in a triangular grid shape or a rectangular grid shape, and each gas well device is vertically arranged; the distance between two adjacent pumping wells is not more than 10m, and the distance between two adjacent gas injection wells is not more than 10 m.
Preferably, the aerobic treatment is carried out in different areas, the area of each area is not more than 50m multiplied by 50m, and the operation period of the aerobic ventilation system is 5-10 days.
The beneficial effects of the utility model reside in that:
1. the gas well device has the advantages of simple structure, convenience in manufacturing, convenience in forming standardized products, convenience in installation, connection into a gas well network and disassembly in aerobic treatment, high construction efficiency, strong reliability, obvious construction cost saving and construction period and safety construction period.
2. The good oxygen ventilation effect of gas well device of this scheme, and possess certain function expansibility, used material has certain intensity and corrosion resistance, repeatedly usable after demolising can satisfy the demand of the good oxygen treatment project of different landfills, practices thrift the treatment cost.
3. The application method of the gas well device in the landfill aerobic treatment is particularly suitable for being used as a pretreatment unit to be matched with subsequent landfill ex-situ mining construction and continuous operation in different areas, is favorable for efficient butt joint of the engineering contents, and fills up the blank of relevant research.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 shows a front view of a gas well installation for aerobic remediation of a landfill in accordance with an embodiment of the present invention.
Figure 2 shows a top view of a gas well installation for aerobic remediation of a landfill in accordance with an embodiment of the present invention.
Figure 3 shows a side view of a gas well installation for aerobic remediation of a landfill in accordance with an embodiment of the present invention.
Fig. 4 shows a schematic diagram of a connection structure of a gas well device for aerobic treatment of a landfill according to an embodiment of the present invention.
Description of the reference numerals
1. A well pipe; 2. a vent hole; 3. a connecting member; 4. an H-shaped top cap; 5. an air duct; 6. a connecting flange; 7. a threaded hole; 8. a gas collection valve; 9. a manual butterfly valve; 10. monitoring the probe; 11. a suction pipeline or a gas injection pipeline.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The utility model provides a gas well device that is used for rubbish landfill good oxygen to administer, include: the well casing and the connecting piece that communicate each other, the connecting piece sets up in the well casing top, and the top of connecting piece is sealed to with H type hood welding, be equipped with the air duct on the lateral wall of connecting piece, set up the air vent on the lateral wall of well casing.
Specifically, in aerobic treatment application, the gas well device can be integrally inserted into a garbage pile body by using a mechanical pile driver with an automatic chuck, and the insertion depth reaches the length of the whole well pipe; after the aerobic treatment is completed, the whole gas well device can be pulled out of the garbage pile body, and can be moved to the next area to perform aerobic pretreatment operation with the same steps after being pulled out, so that the installation and dismantling operation is very quick. The gas well device has the advantages of simple structure, convenient manufacture, convenient formation of standardized products, convenient installation, connection into a gas well network and disassembly in aerobic treatment, high construction efficiency, strong reliability, obvious saving of construction cost and construction and installation period.
Preferably, the bottom of the well pipe is conical, and the well pipe is cast iron or galvanized steel pipe.
Specifically, the bottom of the well pipe is conical, so that the well pipe is integrally inserted into the garbage pile body when the pile driver is used for installation, the installation resistance is reduced, and the installation efficiency is improved; the well pipe is made of cast iron or galvanized steel pipe, so that the well pipe is excellent in corrosion resistance and durable in use.
Preferably, the well tubular has a nominal diameter of 50cm to 100cm, a length of 3.5m to 5.5m, and an open-hole section length of 3.0m to 5.0 m.
Specifically, the pipe diameter, the length and the open hole section length of the well pipe can be set according to requirements.
Preferably, the aperture of the vent holes is 6mm-10mm, the vent holes are arranged in rows on the side wall of the well pipe, the interval between every two adjacent vent holes in each row of vent holes is 10cm-20cm, and the vent holes in every two adjacent rows are arranged in a staggered mode.
Specifically, the aperture, arrangement and hole interval of the vent holes can be set as required.
As preferred scheme, be equipped with gas collection valve on the lateral wall of air duct, the tip of air duct is equipped with flange.
Specifically, a gas collecting valve is arranged for collecting gas samples periodically so as to monitor and master the progress of aerobic treatment; the air guide pipe and the flange sheet on the side wall of the connecting piece can be used for connecting an air suction pipeline or an air injection pipeline, and can also be connected with other equipment according to requirements, so that the functions of the connecting piece are expanded.
Preferably, the gas collecting valve is a ball valve.
As preferred scheme, the top of connecting piece is equipped with the screw hole, and the screw hole is used for installing monitoring probe, and the top of connecting piece is equipped with H type hood.
Specifically, the material of the H-shaped top cap can be selected at will according to requirements, and cast iron or galvanized steel is preferred; set up H type hood and play the effect of protection connecting piece: on one hand, when the gas well device is inserted into or pulled out of the garbage pile body, the pile driver takes the H-shaped top cap as a force point, so that the gas well device is convenient to mount and dismount; on the other hand, the H-shaped top cap can effectively avoid damage to the well end connecting piece and the monitoring instrument in the gas well mounting and dismounting process.
In the manufacturing process of the gas well device, the well pipe, the connecting piece and the H-shaped top cap are processed in a split mode, and the well pipe, the connecting piece and the H-shaped top cap are welded into a whole through a fish scale welding method after being processed, so that the connection is firm and durable.
Preferably, the monitoring probe comprises a gas pressure monitoring probe, a gas temperature monitoring probe and a gas humidity monitoring probe.
Preferably, the H-shaped top cap is made of cast iron or galvanized steel.
Preferably, the connecting piece is made of cast iron or galvanized steel.
The utility model also provides an aerobic treatment method for the refuse landfill, which comprises the following steps:
1) arranging a plurality of gas well devices for the aerobic treatment of the landfill in a grid manner in a garbage pile body, and completely inserting well pipes of the gas well devices into the garbage pile body;
2) connecting one part of gas well devices to an air extraction pipeline to be used as an air extraction well, and connecting the other part of gas well devices to an air injection pipeline to be used as an air injection well, wherein the air extraction well and the air injection well are arranged at intervals;
3) and starting the aerobic ventilation system, and monitoring the landfill gas component of the extraction well through the gas guide pipe.
As the preferred scheme, the gas well device is connected to the gas injection pipeline or the gas extraction pipeline through a gas guide pipe, and a manual butterfly valve is arranged between the gas guide pipe and the gas injection pipeline or the gas extraction pipeline.
As a preferred scheme, a plurality of gas well devices are arranged in the garbage heap in a triangular grid shape or a rectangular grid shape, and each gas well device is vertically arranged; the distance between two adjacent pumping wells is not more than 10m, and the distance between two adjacent gas injection wells is not more than 10 m.
Preferably, the aerobic treatment is carried out in different areas, the area of each area is not more than 50m multiplied by 50m, and the operation period of an aerobic ventilation system is 5-10 days.
Examples
FIG. 1 shows a front view of a gas well installation for aerobic remediation of a landfill in accordance with this embodiment; FIG. 2 shows a top view of a gas well installation for aerobic remediation of a landfill in accordance with this embodiment; FIG. 3 shows a side view of a gas well installation for aerobic remediation of a landfill in accordance with this embodiment; fig. 4 shows a schematic diagram of the connection structure of the gas well device for the aerobic treatment of the landfill according to the embodiment.
As shown in fig. 1 to 4, the gas well device for the aerobic treatment of the landfill site comprises: the well pipe 1 is a galvanized steel pipe, the side wall of the well pipe 1 is provided with a vent hole 2, and the bottom of the well pipe is conical; the connecting piece 3 is arranged at the top of the well pipe 1, the top end of the connecting piece is closed, the side wall of the connecting piece is provided with an air guide pipe 5, the side wall of the air guide pipe 5 is provided with an air collecting valve 8, the end part of the air guide pipe 5 is provided with a connecting flange 6, and the top end of the connecting piece 3 is provided with a threaded hole 7 for installing a monitoring probe 10; the top of the connecting piece 3 is provided with an H-shaped top cap 4. The manufacturing parameters of the gas well device are as follows: the nominal diameter of the well pipe 1 is 100cm, the whole length is 3.5m, the length of the open pore section is 3m, and the galvanized steel pipe is made of a galvanized steel pipe material; the conical part of the lower end of the well pipe 1 is not provided with a vent hole; the aperture of the vent holes 2 is 6mm, the vent holes 2 are arranged in rows on the side wall of the well pipe 1, the interval between two adjacent vent holes 2 in each row of vent holes 2 is 10cm, and the vent holes 2 in two adjacent rows are arranged in a staggered mode.
A certain domestic garbage landfill in south China is started from 1995 to end of 2003, and the service time is 9 years. According to the survey report, the survey result of the inventory quantity of the landfill inventory quantity garbage is about 44 ten thousand meters3. The area of the domestic garbage landfill area is about 4.0 ten thousand meters2The total area of the garbage pile is about 3.4 ten thousand meters2. The landfill is a simple garbage landfill, corresponding percolate guide, discharge, collection and treatment facilities are not made, and potential pollution to underground soil and underground water exists for a long time. According to the characteristics of the landfill garbage and relevant process requirements, the aerobic ventilation technology is determined to be adopted to pretreat the landfill garbage, so that the concentration of methane and malodorous gas in the pile is reduced, and the basic technical requirements of ex-situ mining are met in a short time.
1. The trial production of the gas well device comprises the following steps:
1) a galvanized steel pipe is adopted to trial manufacture a well pipe, the nominal diameter is 100cm, and the total length is 3.5 m. The lower part of the well pipe is provided with holes which are arranged in a quincunx shape, the hole diameter of each hole is 6mm, the vent holes are arranged on the side wall of the well pipe in rows, the interval between every two adjacent vent holes in each row of vent holes is 10cm, the vent holes in every two adjacent rows are arranged in a staggered mode, the total length of the well pipe with the holes is 3.0m, the lower end of the well pipe is in a conical shape, and no vent hole is arranged;
2) the connecting piece is made of galvanized steel, the connecting piece is hollow, a section of air guide pipe is welded in the center of the side wall, the end part of the air guide pipe is connected with a flange sheet, a gas sampling ball valve is installed on the side wall of the air guide pipe, and 3 threaded holes are reserved in the top of the connecting piece;
3) manufacturing an H-shaped top cap by adopting galvanized steel;
4) after the parts are respectively processed, welding the lower end of the connecting piece with the top end of the well pipe to form a gas passage; then welding the H-shaped top cap to the top of the connecting piece by a fish scale welding method, wherein the welding strength is better;
5) after the gas well device is integrally formed, 3 monitoring probes are installed in threaded holes reserved in the top of the connecting piece and are respectively used for testing pressure, gas temperature and humidity.
It is necessary to prepare 28 sets of the gas well installation described above.
2. Installation and application of gas well devices:
1) and (3) installing the gas well device by adopting a mechanical pile driver with an automatic chuck. The pumping and gas injection wells are distributed in a grid shape at intervals; the interval between the wells with the same function is 10 m; the well pipe section of the gas well assembly is fully inserted into the stack to a depth of about 3.5 m.
2) And respectively connecting the gas pumping well and the gas injection well with a gas pumping pipeline and a gas injection pipeline, and starting aerobic operation after determining that each valve is in an open state.
In this embodiment, a manual butterfly valve 9 and an air suction pipeline or an air injection pipeline 11 are sequentially connected to the outside at the flange 6 of the air duct 5 on the side wall of the connecting piece 3. In the embodiment, the area of the single aerobic ventilation treatment is about 30m multiplied by 30 m.
In order to master the aerobic aeration implementation effect, the landfill gas component of the extraction well is monitored through the gas sampling valve on the gas guide pipe in the morning and afternoon every day in the operation process. After 5 continuous days of aerobic ventilation, the methane content of all the extraction wells on the surface to be excavated is lower than 5 percent after 4 continuous tests; meanwhile, the concentration of methane at the position of 15-20cm on the surface of the pile body to be excavated is less than 1.5%, the concentration of hydrogen sulfide is less than 5ppm, and the relevant requirements of ' aerobic pretreatment termination index is suitable for ensuring that the concentration of methane in the pile body is less than 5% and odor is remarkably reduced ' in the technical standard of ecological restoration of domestic garbage landfill (promissory draft) ', and the ectopic mining operation can be started on the area after the gas well device is dismantled. In this embodiment, the mining depth of the garbage after single aerobic pretreatment is about 3 m. The removed gas well assembly can be moved to the next zone to repeat the aerobic pretreatment step.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A gas well device for aerobic treatment of a landfill site is characterized by comprising: the well casing and the connecting piece that communicate each other, the connecting piece set up in the well casing top, the top of connecting piece is sealed, be equipped with the air duct on the lateral wall of connecting piece, set up the air vent on the lateral wall of well casing.
2. A gas well installation for aerobic remediation of landfill sites as claimed in claim 1 wherein the bottom of the well pipe is tapered and the pipe is cast iron or galvanized steel.
3. A gas well installation for aerobic remediation of landfill sites as claimed in claim 1 wherein the well tubular has a nominal diameter of 50cm to 100cm and a length of 3.5m to 5.5m and the open section of the well tubular is 3.0m to 5.0 m.
4. The gas well apparatus for aerobic remediation of landfill sites as claimed in claim 1, wherein the vent holes have a diameter of 6mm to 10mm, the vent holes are arranged in rows on the side wall of the well casing, the interval between two adjacent vent holes in each row of vent holes is 10cm to 20cm, and the vent holes in two adjacent rows are staggered.
5. The gas well device for aerobic treatment of a landfill site as claimed in claim 1, wherein the gas collecting valve is provided on the side wall of the gas guiding tube, and the end of the gas guiding tube is provided with a connecting flange.
6. The gas well installation for aerobic remediation of a landfill as claimed in claim 5 wherein the gas collection valve is a ball valve.
7. The gas well device for the aerobic treatment of the refuse landfill according to the claim 1, characterized in that the top end of the connecting piece is provided with a threaded hole for installing a monitoring probe, and the top of the connecting piece is provided with an H-shaped top cap.
8. A gas well installation for aerobic remediation of a landfill as claimed in claim 7 wherein the monitoring probes include a gas pressure monitoring probe, a gas temperature monitoring probe and a gas humidity monitoring probe.
9. The gas well device for the aerobic treatment of the landfill site as claimed in claim 7, wherein the H-shaped top cap is made of cast iron or galvanized steel.
10. The gas well device for aerobic treatment of landfill sites as claimed in claim 1, wherein the connector is made of cast iron or galvanized steel.
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| CN201921280669.5U CN210474944U (en) | 2019-08-08 | 2019-08-08 | Gas well device for aerobic treatment of refuse landfill |
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| CN201921280669.5U CN210474944U (en) | 2019-08-08 | 2019-08-08 | Gas well device for aerobic treatment of refuse landfill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110523737A (en) * | 2019-08-08 | 2019-12-03 | 北京高能时代环境技术股份有限公司 | Gas well device and aerobic administering method for the aerobic improvement of refuse landfill |
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2019
- 2019-08-08 CN CN201921280669.5U patent/CN210474944U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110523737A (en) * | 2019-08-08 | 2019-12-03 | 北京高能时代环境技术股份有限公司 | Gas well device and aerobic administering method for the aerobic improvement of refuse landfill |
| CN110523737B (en) * | 2019-08-08 | 2024-02-23 | 北京高能时代环境技术股份有限公司 | Gas well device for aerobic treatment of refuse landfill and aerobic treatment method |
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