CN213316767U - Pipe ditch structure of landfill - Google Patents

Abstract

The utility model discloses a trench structure of landfill is buried underground in rubbish heap internally, include: the pipe wall of the pipe is provided with a plurality of first openings distributed along the axial direction so as to form a passage between the pipe and the garbage pile body; a partition portion configured to partition a lumen of the catheter into a first lumen and a second lumen in an axial direction; the gas pipeline is arranged in the first pipe cavity in a penetrating mode, and the pipe wall of the gas pipeline is provided with a plurality of second openings distributed along the axial direction so as to form a gas passage; the leachate pipeline penetrates through the second pipe cavity, and the pipe wall of the leachate pipeline is provided with a plurality of third openings which are distributed along the axial direction so as to form a leachate passage; a first filter layer configured to cover the catheter; a second filter layer configured to cover the first filter layer. The utility model discloses an avoided one set of drainage guide system of landfill mixed use to lead to the problem of mutual influence among the trench structure, once constructed simultaneously and laid and just can accomplish, practiced thrift the construction cost again.

Description

Pipe ditch structure of landfill

Technical Field

The utility model belongs to the technical field of domestic waste landfill and specifically relates to a trench structure of landfill with leachate pipeline and gas pipeline.

Background

With the rapid development of social economy and the gradual improvement of living standard, the yield of urban domestic garbage is increased day by day, the garbage components are continuously changed, most of the domestic garbage is piled in a dew form without proper treatment, and serious harm is caused to human life and ecological environment, such as occupation of a large amount of land, air pollution, water pollution, fire hazard, harm to human health and the like. The sanitary landfill technology is suitable for all types of garbage due to simple operation, large treatment capacity, low treatment cost and the like, is the most important garbage treatment mode at present, but has the following problems: the occupied area is large, and the site selection is difficult; the garbage is mixed and buried, the recyclable materials cannot be recycled, and the resource utilization rate is low; the leachate has high yield, poor treatment effect and high cost, and secondary pollution is easily caused if the leachate is not treated properly; methane gas generated by a landfill has fire hazard and can aggravate greenhouse effect; the landfill stability speed is slow, and long-time supervision is needed. In order to solve some defects of the traditional landfill site, research on bioreactor landfill site experiments is developed in each country successively. The essential difference between a bioreactor landfill and a sanitary landfill is that: the passive garbage degradation process is improved into the actively controlled degradation process, so that the biodegradation rate of the garbage can be obviously improved, the stabilization time of a landfill site is shortened, the landfill gas yield is increased, and the garbage recycling and harmless level is improved.

The core technology of the aerobic bioreactor landfill is forced ventilation in the landfill and combined leachate recharge, and the two operation means can accelerate the degradation of the garbage and effectively shorten the stabilization time of the landfill. However, since the aerobic bioreactor landfill mainly uses the leachate collection, drainage and recharge system to transmit oxygen, the leachate recharge system and the gas drainage system are often mixed to use one drainage system, which is easy to affect each other. In order to solve the problem, the leachate recirculation ditch and the landfill gas collecting pipe are usually constructed separately in the construction in the prior art, but the construction and the operation cost of a landfill site are necessarily increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a trench structure of landfill, include:

the pipe wall of the pipe is provided with a plurality of first openings distributed along the axial direction so as to form a passage between the pipe and the garbage pile body;

a partition portion configured to partition a lumen of the catheter into a first lumen and a second lumen in an axial direction;

the gas pipeline is arranged in the first pipe cavity in a penetrating mode, and the pipe wall of the gas pipeline is provided with a plurality of second openings distributed along the axial direction so as to form a gas passage;

the leachate pipeline penetrates through the second pipe cavity, and the pipe wall of the leachate pipeline is provided with a plurality of third openings which are distributed along the axial direction so as to form a leachate passage;

a first filter layer configured to cover the catheter;

a second filter layer configured to cover the first filter layer.

In some embodiments, the first filtration layer is a gravel pack.

In some embodiments, the crushed stone in the crushed stone filler layer has a particle size of between 40mm and 80 mm.

In some embodiments, the second filtration layer is a geoscreen.

In some embodiments, the geotechnical filter screen has an areal density specification of 200 g/m²The above.

In some embodiments, the trench structure of the present invention further comprises: two blind plates are arranged to block the two ends of the catheter.

In some embodiments, the gas conduit comprises a gas collection tube; the leachate pipeline comprises a leachate recharge pipe.

In some embodiments, the conduit, gas conduit, and leachate conduit are made of high density polyethylene and have a pressure rating of 1.0 Mpa or greater.

In some embodiments, the trench structure has a depth of 0.6m or more and a width of 1m or more.

In some embodiments, the nominal diameter of the conduit is 315 mm or more and the pore size of the first opening is 10mm or more;

the nominal diameter of the gas pipeline is more than 50mm, and the aperture of the second opening is between 5mm and 10 mm; and

the nominal diameter of the leachate pipeline is more than 50mm, and the aperture of the third opening is between 5mm and 10 mm.

The utility model discloses a leachate pipeline and gas pipeline are worn to be equipped with in the inside of pipe among the trench structure, have avoided the landfill to mix and have used one set of drainage guide system of leading to the problem of mutual influence, simultaneously the utility model discloses a trench structure is once under construction and is laid and just can accomplish, has practiced thrift the construction cost again, is favorable to the popularization and the application of good oxygen type bioreactor landfill technique.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Symbolic illustration in the drawings:

10, garbage dump body;

1 a first filter layer;

2 a second filter layer;

3, a conduit;

4 a partition part;

5 a gas pipeline;

6 leachate pipeline;

a width W;

h depth.

Detailed Description

The invention will be further explained by means of specific embodiments with reference to the drawings in which:

example 1

The present embodiment provides a trench structure of a landfill site, as shown in fig. 1, the trench structure is buried inside a garbage stack 10, and includes: first filter layer 1, second filter layer 2, conduit 3, partition 4, gas conduit 5, and leachate conduit 6, wherein:

a duct 3 having a plurality of first openings distributed along an axial direction on a wall thereof to form a passage between the duct 3 and the garbage stack 10;

a partition 4 provided to partition the lumen of the catheter 3 into a first lumen 51 and a second lumen 52 in the axial direction;

a gas pipe 5 passing through the first lumen 51, the wall of which has a plurality of second openings distributed along the axial direction to form a gas passage;

the leachate pipeline 6 is arranged in the second pipe cavity 61 in a penetrating mode, and the pipe wall of the leachate pipeline is provided with a plurality of third openings distributed along the axial direction so as to form a leachate passage;

a first filter layer 1 configured to cover the duct 3;

and a second filter layer 2 disposed to cover the first filter 1.

In the present embodiment, the first filter layer 1 is a gravel packing layer, wherein the packed gravel has a particle size of 40mm to 80 mm. The gravel packing layer is used for filtering leachate to avoid blockage of the conduit 3 caused by impurities in the leachate.

In this embodiment, the second filter layer 2 is a geotextile filter having an areal density of 200 g/m²The above. The geotechnical filter screen distinguishes the garbage pile 10 from the broken stone filling layer and simultaneously plays a role in primary filtering of leachate of the garbage pile 10.

In this embodiment, blind plates (not shown) are respectively disposed at two ends of the conduit 3 to close the conduit 3, so as to prevent debris or impurities from entering the conduit 3 and causing blockage.

The utility model provides a gas pipeline 5 is used for gaseous transport, can be used as gaseous gas injection pipe, lets in gas in the rubbish heap body 10, also can be used as the gas collecting pipe, outwards discharges the gas of the production in the rubbish heap body 10. In some embodiments, both a gas injection tube and a gas collection tube may also be included.

The utility model provides a leachate pipeline 6 is used for the transport of leachate, can be used as leachate recharge pipe, to recharging leachate in the rubbish heap body 10, also can be used as leachate collecting pipe, outwards discharges the leachate of the production in the rubbish heap body 10. In some embodiments, both a leachate recharge tube and a leachate collection tube may also be included.

In this embodiment, the conduit 3, the gas line 5 and the leachate line 6 are made of high density polyethylene and have a pressure rating of 1.0 Mpa or more.

In this embodiment, the nominal diameter of the selected conduit 3 is more than 315 mm, and the aperture of the first opening on the wall of the conduit is more than 10 mm; the nominal diameter of the selected gas pipeline 5 is more than 50mm, and the aperture of the second opening is between 5mm and 10 mm; and the nominal diameter of the selected leachate pipeline 6 is more than 50mm, and the aperture of the third opening is between 5mm and 10 mm.

In this embodiment, the partition 4 of the duct 3 is made of high density polyethylene and has a thickness of 20mm or more.

In the present embodiment, the cross section of the trench structure is rectangular (as shown in fig. 1), the depth H is 0.6m or more, and the width W is 1m or more. In other embodiments, the cross-section of the trench structure may also be an inverted trapezoid.

Example 2

This embodiment provides one the utility model discloses a method of laying of trench structure to explain more clearly the utility model discloses a structure and beneficial effect, during the concrete implementation, including the step:

1) firstly, digging a pipe trench on the garbage heap 10, wherein the cross section of the pipe trench can be rectangular or inverted trapezoidal, in the embodiment, the pipe trench is rectangular (as shown in fig. 1), the width of the formed pipe trench is not less than 1.0m, the depth of the formed pipe trench is not less than 0.6m, and the length of the formed pipe trench is not more than 40 m;

2) the geotechnical filter screen 2 is laid on the surface of the formed pipe ditch, and in the embodiment, the surface density specification of the geotechnical filter screen 2 is 200 g/m²；

3) Filling crushed stone on the surface of the geotechnical filter screen 2 in the pipe trench to form a crushed stone layer with a preset thickness, wherein the thickness of the crushed stone layer is 30cm in the embodiment;

4) burying a conduit 3 on the crushed stone layer, wherein a partition part 4 is pre-installed in the conduit 3 to partition the conduit 3 into a first conduit cavity 51 and a second conduit cavity 61 in the axial direction, a gas pipeline 5 penetrates through the first conduit cavity 51, a leachate pipeline 6 penetrates through the second conduit cavity 61, and blind plates for plugging the conduit 3 are respectively arranged at two ends of the conduit 3;

5) continuously filling the pipe ditch with crushed stone to cover the conduit 3, and forming a crushed stone filling layer 1 by the crushed stone filled in the pipe ditch;

6) the crushed stone filling layer 1 is wrapped by the geotechnical filter screen 2 to form the pipe ditch structure of the utility model;

7) and continuously backfilling the garbage pile above the pipe ditch structure, and finishing construction.

The utility model discloses a gas pipeline 5 and leachate pipeline 6 have been predetermine to the trench structure in pipe 3, lay through a construction and just can accomplish, have avoided one set of drainage guide system of landfill mixed use to lead to the problem of influence each other, have practiced thrift the construction cost again, are favorable to the popularization and the application of good oxygen type bioreactor landfill technique.

The above is only the preferred embodiment of the present invention, not for limiting the protection scope of the present invention, and the ordinary skilled person in the art can use the equivalent modification or change of the present invention, which should belong to the protection scope of the present invention.

Claims (10)

1. The utility model provides a trench structure of landfill, buries underground in the rubbish heap internally which characterized in that includes:

a duct having a wall with a plurality of first openings distributed axially to form a passage between the duct and the waste stack;

a partition portion configured to partition a lumen of the catheter into a first lumen and a second lumen in an axial direction;

the gas pipeline penetrates through the first pipe cavity, and the pipe wall of the gas pipeline is provided with a plurality of second openings which are distributed along the axial direction so as to form a gas passage;

the leachate pipeline penetrates through the second pipe cavity, and the pipe wall of the leachate pipeline is provided with a plurality of third openings which are distributed along the axial direction so as to form a leachate passage;

a first filter layer configured to cover the conduit;

a second filter layer configured to wrap the first filter layer.

2. The trench structure for a landfill of claim 1, wherein the first filter layer is a crushed stone filler layer.

3. A trench structure for a landfill site as claimed in claim 2, wherein the crushed stone in the crushed stone filling layer has a particle size of between 40mm and 80 mm.

4. A trench structure for a landfill according to claim 1, wherein the second filter layer is a geotextile screen.

5. A trench structure for a landfill according to claim 4, wherein the geotechnical filter mesh has an areal density specification of 200 g/m²The above.

6. A trench structure for a landfill as set forth in claim 1, further comprising: two blind plates are arranged to block the two ends of the catheter.

7. A trench structure for a landfill of claim 1 wherein the gas conduit includes a gas collection pipe; the leachate pipeline comprises a leachate recharge pipe.

8. A trench structure for a landfill according to claim 1, wherein the duct, the gas pipe and the leachate pipe are made of high density polyethylene and have a pressure rating of 1.0 Mpa or more.

9. The trench structure for a landfill according to claim 1, wherein the trench structure has a depth of 0.6m or more and a width of 1m or more.

10. A trench structure for a landfill according to any one of claims 1 to 9,

the nominal diameter of the conduit is more than 315 mm, and the aperture of the first opening is more than 10 mm;

the nominal diameter of the gas pipeline is more than 50mm, and the aperture of the second opening is between 5mm and 10 mm; and

the nominal diameter of the leachate pipeline is more than 50mm, and the aperture of the third opening is between 5mm and 10 mm.

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