CN211938371U - Landfill gas guiding and discharging device - Google Patents
Landfill gas guiding and discharging device Download PDFInfo
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- CN211938371U CN211938371U CN202020344382.0U CN202020344382U CN211938371U CN 211938371 U CN211938371 U CN 211938371U CN 202020344382 U CN202020344382 U CN 202020344382U CN 211938371 U CN211938371 U CN 211938371U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
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Abstract
The utility model discloses a landfill gas guiding and discharging device, include: the vertical gas guiding well, the vertical gas guiding pipe and the horizontal gas guiding blind ditch; the vertical gas guide well extends into the middle lower part of the landfill body, and a shaft of the vertical gas guide well has gas permeability; one end of the vertical air duct is arranged in the vertical air duct, the other end of the vertical air duct extends out of the vertical air duct, and a ventilating filling layer is arranged between the vertical air duct and the shaft; the vertical air duct is a porous pipe below the bottom layer of the field sealing structure layer, and a solid pipe above the bottom layer of the field sealing structure layer; the horizontal air guide blind ditch is arranged on the surface layer of the landfill body and radially distributed around the vertical air guide pipe, and the horizontal air guide blind ditch is communicated with the vertical air guide pipe. Adopt the utility model discloses a device carries out the landfill gas guide bar after the landfill yard closes, and it is low to have the construction degree of difficulty, and the guide bar is effectual, and application scope is wide, can realize advantages such as effective linking up of vertical guide bar and horizontal guide bar.
Description
Technical Field
The utility model relates to a gaseous leading row technical field of landfill, concretely relates to landfill gas leading row device, the gaseous leading row measure of landfill when being applicable to the landfill yard closure is not smooth waiting under the operating mode.
Background
In recent years, with national regulations on policies related to domestic waste disposal, design service life of landfill sites and other factors, domestic waste landfill sites gradually reach a later maintenance and management period, and a large number of landfill sites and irregular stacking points face final sealing.
For historical reasons, a large number of landfill sites and irregular stacking points are not constructed at the initial stage, and if the landfill gas is not effectively collected and drained, the landfill gas is randomly migrated from the landfill body through the landfill covering soil and the adjacent soil and enters the atmospheric environment; not only causes environmental pollution and aggravates greenhouse effect, but also has explosion hidden trouble in methane gas under certain conditions.
At the present stage, the landfill gas guide and discharge device for landfill site closing construction mainly takes a vertical guide gas well as neglects the guide and discharge of horizontal landfill gas.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem that exists among the prior art, the utility model provides a landfill gas guide device can compromise the level when realizing vertical gas guide row and lead row to have the construction degree of difficulty low, lead advantages such as arrange effectual, application scope extensively.
The utility model discloses a landfill gas guiding and discharging device, which is arranged on a landfill site, wherein the bottom of the landfill site is a landfill body, and the surface layer is a sealing structure layer and is used for guiding and discharging landfill gas in the landfill body after sealing; the method comprises the following steps: the vertical gas guiding well, the vertical gas guiding pipe and the horizontal gas guiding blind ditch;
the vertical gas guiding well extends to the middle lower part of the landfill body, and a shaft of the vertical gas guiding well has gas permeability;
one end of the vertical air duct is arranged in the vertical air duct, the other end of the vertical air duct extends out of the vertical air duct, and a breathable filling layer is arranged between the vertical air duct and the shaft; the vertical air guide pipe is a porous pipe below the bottom layer of the field sealing structure layer, and a solid pipe is arranged above the bottom layer of the field sealing structure layer;
the horizontal air guide blind ditch is arranged on the surface layer of the landfill pile body and radially distributed around the vertical air guide tubes, and the horizontal air guide blind ditch is communicated with the vertical air guide tubes.
As a further improvement of the utility model, the diameter of vertical gas guiding well is not less than 600mm, the degree of depth is not less than 2/3 of landfill heap body degree of depth.
As a further improvement of the utility model, the diameter of vertical air duct is not less than 100mm, the percent opening is not less than 2%, vertical air duct with the coaxial setting of vertical air guide well.
As a further improvement of the utility model, the vertical air duct is higher than the surface of the sealing structure layer and is an inverted L-shaped structure.
As a further improvement of the utility model, the pit shaft is a geogrid or a reinforcing bar grid, and the breathable filling layer is graded broken stones or pebbles.
As a further improvement of the utility model, the outer wall of the perforated section of the vertical air duct is wrapped with geotextile.
As a further improvement of the utility model, the horizontal air guide blind ditch is the groove structure that graded rubble or cobble constitute, parcel geotechnological cloth on the outer wall of horizontal air guide blind ditch.
As a further improvement of the utility model, a horizontal air duct is arranged in the horizontal air duct blind ditch, and the horizontal air duct is a perforated pipe;
the horizontal air duct is communicated with the vertical air duct through a tee.
As a further improvement of the utility model, the structure layer of sealing includes from bottom to top in proper order: air guide layer, barrier layer, drainage blanket and afforestation soil layer.
As a further improvement of the utility model, the vertical air duct is sealed with the impermeable layer through a sealing element.
Compared with the prior art, the beneficial effects of the utility model are that:
the guide exhaust device of the utility model can realize vertical gas guide exhaust and horizontal gas guide exhaust, and realize effective connection of the vertical guide exhaust and the horizontal guide exhaust; the method has the advantages of low construction difficulty, good drainage guide effect, wide application range and the like; the gas guide and exhaust device is not only suitable for gas guide and exhaust of a household garbage landfill, but also suitable for gas guide and exhaust under working conditions of general industrial solid waste and the like.
Drawings
Fig. 1 is a schematic structural view of a landfill gas guiding and discharging device according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a horizontal gas guiding blind ditch in the landfill gas drainage device disclosed by the embodiment of the invention.
In the figure:
1. burying the pile body; 2. a vertical gas guiding well; 2-1, grading broken stones or pebbles; 2-2, earthwork/steel bar mesh; 3. a vertical gas-guide tube; 3-1, non-woven geotextile; 4; a horizontal air guide blind ditch; 4-1, spinning geotextile; 5. a sealing structure layer; 5-1, an air guide layer; 5-2, an impermeable layer; 5-3, a drainage layer; 5-4, greening soil layer; 6. and a seal.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the present invention provides a landfill gas guiding and discharging device, which is used for guiding and discharging landfill gas generated by the pile in the landfill site; wherein, present landfill structure is by the landfill heap body 1 of bottom and the seal structure layer 5 on top layer, and seal structure layer 5 can design for multilayer structure, the utility model discloses a seal structure layer 5's structure does: from bottom to top: 5-1 parts of air guide layer, 5-2 parts of impermeable layer, 5-3 parts of drainage layer and 5-4 parts of greening soil layer.
As shown in fig. 1, the landfill gas guiding and discharging device of the utility model comprises a vertical gas guiding well 2, a vertical gas guiding pipe 3 and a horizontal gas guiding blind ditch 4; wherein the content of the first and second substances,
the utility model discloses a vertical guiding well 2 forms for the construction of the selected suitable position department on the landfill site, and the diameter of the vertical guiding well 2 that bores is not less than 600mm, and the degree of depth that vertical guiding well 2 bored into should not be less than 2/3 of landfill heap depth degree, and the upper end of guiding well exceeds about 1m of the upper surface of seal structure layer 5, lays the basis that does not destroy original barrier layer in the shaft bottom. The utility model discloses vertical gas guide row is realized to vertical direction well 2's effect, for this reason the utility model discloses select gas permeability such as geotechnological net or reinforcing bar net 2-2 and have the material of certain intensity as the pit shaft.
The utility model discloses a vertical air duct 3 sets up in vertical air duct well 2, preferred vertical air duct 3 and the coaxial design of vertical air duct well 2. The utility model discloses a nominal diameter of vertical air duct 3 should not be less than 100mm, and the outside parcel geotechnological cloth of vertical air duct 3 is preferably nonwoven geotechnological cloth 3-1. The utility model is filled with a ventilating filling layer between the shaft and the vertical air duct 3, and the ventilating filling layer can adopt graded broken stones or pebbles 2-1; the vertical air duct 3 is divided into two sections by taking the lower surface of the sealing structure layer 5 (the upper surface of the landfill body 1) as a boundary, the vertical air duct is a porous pipe below the lower surface of the sealing structure layer 3, a solid pipe is arranged above the lower surface of the sealing structure layer, the open holes of the open hole sections are preferably strip-shaped holes or circular holes, and the open hole rate is not less than 2%. Further, the vertical air duct 3 of the present invention is higher than the surface of the sealing structure layer 5 and is of an inverted "L" type structure, as shown in fig. 1.
As shown in fig. 1 and 2, the utility model discloses a horizontal air guide french drain 4 sets up on the top layer of landfill heap body 1, is enclosing vertical air guide well 2 and evenly lays according to the radioactivity, and 4 sections of horizontal air guide french drain can adopt rectangle or trapezoidal, and concrete size adjusts according to actual current situation, and the outside parcel of horizontal air guide french drain 4 has the geotechnological cloth 4-1 of spinning, inboard packing grading rubble or cobble, and horizontal air guide french drain 4 is linked together with vertical air duct 3. The horizontal gas guide blind ditch 4 is used for realizing horizontal gas guide and discharge, and is communicated with the vertical gas guide tube 3 or the vertical gas guide well 2 to realize effective connection of the vertical gas guide and the horizontal gas guide.
On the basis, the horizontal air guide blind ditch 4 of the utility model can be also internally provided with a horizontal air guide pipe which is a perforated pipe; the horizontal air duct is communicated with the vertical air duct through a tee joint.
In order to prevent the gas inside the landfill body 1 from leaking, the utility model is sealed with the impermeable layer 5-2 through the sealing element 6 on the vertical air duct 2, and the sealing structure is similar to official boots and other forms.
The utility model has the advantages that:
when the vertical guide and drainage device of the utility model realizes vertical guide and drainage of landfill gas, horizontal guide and drainage blind ditches are laid around the vertical gas guide well, so that horizontal gas guide and drainage is realized, and further the effective connection of the vertical guide and drainage and the horizontal guide and drainage is realized; the method has the advantages of low construction difficulty, good drainage guide effect, wide application range and the like; the gas guide and exhaust device is not only suitable for gas guide and exhaust of a household garbage landfill, but also suitable for gas guide and exhaust under working conditions of general industrial solid waste and the like.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A landfill gas guide and exhaust device is arranged on a landfill site, wherein the bottom of the landfill site is a landfill body, and the surface layer of the landfill site is a sealing structure layer and is used for guiding and exhausting landfill gas in the landfill body after sealing; it is characterized by comprising: the vertical gas guiding well, the vertical gas guiding pipe and the horizontal gas guiding blind ditch;
the vertical gas guiding well extends to the middle lower part of the landfill body, and a shaft of the vertical gas guiding well has gas permeability;
one end of the vertical air duct is arranged in the vertical air duct, the other end of the vertical air duct extends out of the vertical air duct, and a breathable filling layer is arranged between the vertical air duct and the shaft; the vertical air guide pipe is a porous pipe below the bottom layer of the field sealing structure layer, and a solid pipe is arranged above the bottom layer of the field sealing structure layer;
the horizontal air guide blind ditch is arranged on the surface layer of the landfill pile body and radially distributed around the vertical air guide tubes, and the horizontal air guide blind ditch is communicated with the vertical air guide tubes.
2. The landfill gas drainage device of claim 1, wherein the vertical gas guiding well has a diameter of not less than 600mm and a depth of not less than 2/3 of the depth of the landfill body.
3. The landfill gas guide and exhaust device according to claim 1 or 2, wherein the vertical gas guide pipe has a diameter of not less than 100mm and an opening ratio of not less than 2%, and is coaxially arranged with the vertical gas guide well.
4. The landfill gas ducting device of claim 3, wherein the vertical duct is higher than the surface of the seal structure layer and has an inverted "L" shape.
5. The landfill gas drainage device of claim 1, wherein the shaft is a geogrid or a steel grid, and the gas permeable filling layer is graded crushed stone or pebble.
6. The landfill gas drainage device of claim 1, wherein the outer wall of the perforated section of the vertical gas duct is wrapped with geotextile.
7. The landfill gas guide and exhaust device as claimed in claim 1, wherein the horizontal gas guide blind ditch is a groove structure formed by graded broken stones or pebbles, and the outer wall of the horizontal gas guide blind ditch is wrapped with geotextile.
8. The landfill gas guiding and discharging device of claim 1 or 7, wherein a horizontal gas guiding pipe is arranged in the horizontal gas guiding blind ditch, and the horizontal gas guiding pipe is a perforated pipe;
the horizontal air duct is communicated with the vertical air duct through a tee.
9. The landfill gas guiding and discharging device of claim 1, wherein the seal structure layer comprises, in order from bottom to top: air guide layer, barrier layer, drainage blanket and afforestation soil layer.
10. The landfill gas drainage device of claim 9, wherein the vertical gas duct is sealed to the impermeable layer by a seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020344382.0U CN211938371U (en) | 2020-03-18 | 2020-03-18 | Landfill gas guiding and discharging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020344382.0U CN211938371U (en) | 2020-03-18 | 2020-03-18 | Landfill gas guiding and discharging device |
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| CN211938371U true CN211938371U (en) | 2020-11-17 |
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| CN202020344382.0U Active CN211938371U (en) | 2020-03-18 | 2020-03-18 | Landfill gas guiding and discharging device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113843250A (en) * | 2021-09-24 | 2021-12-28 | 上海勘测设计研究院有限公司 | Rigid landfill |
| CN115162419A (en) * | 2022-07-06 | 2022-10-11 | 浙江爱科乐环保有限公司 | Anti-sideslip settlement connecting structure of vertical guide and discharge well and covering film of refuse landfill |
-
2020
- 2020-03-18 CN CN202020344382.0U patent/CN211938371U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113843250A (en) * | 2021-09-24 | 2021-12-28 | 上海勘测设计研究院有限公司 | Rigid landfill |
| CN115162419A (en) * | 2022-07-06 | 2022-10-11 | 浙江爱科乐环保有限公司 | Anti-sideslip settlement connecting structure of vertical guide and discharge well and covering film of refuse landfill |
| CN115162419B (en) * | 2022-07-06 | 2022-12-27 | 浙江爱科乐环保有限公司 | Anti-sideslip settlement connecting structure of vertical guide and discharge well and covering film of refuse landfill |
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