KR100218546B1 - Build-up method of waste landfill sites for leachate recirculation and lfg extraction - Google Patents

Abstract

According to the present invention, the method of reclamation of the landfill, which combines leachate recycling and gas extraction, embeds rubbish between vertically formed dikes and spreads gravel on its surface to provide good air permeability, thereby installing a leachate injection pipe between the gravel layers and slightly above it. The gas extraction pipe was installed at the top, and the sealing sheet was put over the proper distance, and then the land was made available for farmland.

Description

Reclamation Landfill Method for Recycling Leachate and Gas Extraction

The present invention relates to a waste landfilling method that combines leachate recycling and gas extraction to remove pollution after landfilling and utilize landfills as farmland immediately by treating leachate discharged from a landfill and generating gas.

In general, the amount of urban waste is increasing year by year, especially odor problems caused by the import of food waste and the generation of leachate and biogas after landfilling is a problem, but the conventional landfill is a landslide that forms a gentle dam to landfill It was common to do this, but due to the nature of the landfill, the collection and disposal is a problem because it is not accompanied by economic feasibility. Also, as the landfill height increases, the amount of soil to construct the dam increases exponentially, so the cost is not small.

Since the amount of leachate generated after landfill is high and the biological treatment is difficult, it is necessary to recycle the leachate, but in this case, it cannot be easily performed because of the odor problem. There is a problem in that the economy is low, so a lot of investment must be followed for practical use.

In order to solve the conventional problems, the leachate injection pipe and the gas on the surface of the landfill for the purpose of cost reduction, while allowing the surface to be utilized as agricultural land immediately after the completion of the landfill construction by perfecting the leachate treatment and gas extraction. By installing a blowout porous pipe, covering the protective film and waterproof film, and forming a fill layer thereon, the life span of the landfill site can be significantly extended.

1 is a cross-sectional view of the exemplary diagram of the present invention.

Figure 2 is a summary diagram illustrating an example of a method of partitioning and moving a large landfill of the present invention

Figure 3 is a cross-sectional view illustrating a gas extraction and leachate injection device of the present invention

Figure 4 is a perspective view of the ring separation device for separation of the H-beam and the side plate of the present invention

* Explanation of symbols for main parts of the drawings

DESCRIPTION OF SYMBOLS 1 Concrete reinforcement panel 2 Geotextile tile 3,3a H-beam

4 binding wire 5 pumping pipe 6 pump

7 leachate injection tube 8 gas suction porous tube 9 gas blower

10 gas used 11 gasal layer 12 waterproof membrane

13 reinforcement film 14 upper fill layer 15 sidewall waterproof layer

16: lower waterproof layer 17: pumping pipe protection gravel 18: permanent fixed weir

19: Lee seol wek 20: Lift rod 21: Rope fixing pin

22: lift plate 23: pin fixing plate 24: rope

The present invention will be described in detail with reference to the accompanying drawings.

The landfill of the present invention is to form a double retaining wall (1) (1a) made of concrete or the like, as shown in Figure 1 to fill the soil in the interior to form a suitable height and the support for tension support made of geotextile ( 2) binds the retaining wall (1) (1a) a plurality of at regular intervals to form a permanent fixed weir (18). The weir for relocation (19) which forms a temporary temporary film (3) (3a) by using H-Beam and iron plate or wood to a certain size in the waste disposal plant thus constructed and binds it with a binding wire (4). To form. This is to remove the waste after a certain period of time, as shown in Figure 2 after the completion of the reclamation work to the next section is removed and used as the next partition.

Therefore, the retaining wall (1) (1a) is composed of the first start and both side walls and the end of the end portion is made of concrete, etc., but it is economical to construct the temporary wall (3) (3a) of the intermediate wall all. Here, it is not necessary to fill with dirt between the temporary films 3 and 3a, and it can fill with garbage.

When the landfill is completed in one section configured as described above, the surface of the air permeable good gravel is laid between the gravel layer 11, the leachate injection pipe 7 for the leachate recirculation is first pipe uniformly. In the leachate injection pipe 7, a myriad of injection holes 7a are drilled. The leachate injection pipe 7 pipes the gravel layer 11 to an appropriate height and then pipes the leachate sprayed to allow uniform spreading.

The gas intake porous pipe 8 is alternately piped slightly above the leachate injection pipe 7. The gas suction porous tube 8 is gathered in one place and connected to the suction blower 9 so that the gas compressed in the blower 9 is transferred to the use place 10.

The waterproof layer 12 is provided on the gas suction porous tube 8. In order to prevent the waterproof layer 12 from being torn due to floating settling, the waterproof layer 12 is formed with a reinforcement layer 13 made of geotextile, etc., and then the waterproof layer 12 is installed or the waterproof layer 12 is applied to the geotextile itself. ) Can also be integrated.

The waterproof layer 12 is connected to the side waterproof layer 15 installed on the side to prevent leakage of gas and at the same time to prevent water from penetrating. The side waterproof layer 15 is connected to the bottom waterproof layer 16 so that leachate is leaked. To prevent them.

The upper surface of the waterproof layer 12 to fill the soil to take a suitable load and to be used as farmland.

On the other hand, the leachate collected at the bottom is passed through the gravel layer 17 and sucked up by the pump 6 to the pumping pipe 5 and circulated to be injected into the injection hole 7a of the leachate injection pipe 7. In this process, spawning may be added to a suitable place to promote carbonization. Such a system will allow the rubbish to settle, so that the rubbish may be buried a little higher than the retaining wall (1) (1a), or the soil may be further layered after it is completely stabilized.

In FIG. 2, the middle partition is exemplified, and in the case of large-scale landfilling, since the landfill is continuously buried, the middle partition is unnecessary after the landfill, so it is economical to install the used partition next. In FIG. 2, the partitions of A are A 'and A ", and the partitions of B are B' and B"...

3 is a cross-sectional view of the piping state of the leachate injection pipe 7 and the gas intake porous tube 8, the leachate injection pipe 7 drills the injection hole 7a so as to be injected to the side and the upper part, and the spraying effect is greatly installed, and the gas The suction porous tube 8 makes it possible to easily inhale the gas in the gravel layer by using a myriad of porous tubes. Here, the leachate injection pipe 7 and the gas intake porous pipe 8 are alternately installed so as not to interfere with each other.

4 is for disassembly of the man wire by holding the H-beam 3 as a device for reuse of the relocation molten iron 19 described above.

In the present invention, since both sides of the reclamation bank (19) are to be removed and transferred to the landfills as garbage, it is not easy to remove the wire. Therefore, as shown in FIG. 4, when the pin is pulled out and the rope 24 is peeled off, the H-beam 3 or the plate can be easily removed.

Referring to the configuration of the device capable of dismantling the wire by holding the H-beams 3 and 3a, the lift bar 20 is made of a bar or a rope and is connected to the top. The lift 22 integrally connected with the lift rod 20 is pulled up together with the rope fixing pin 21 when pulled from above. The hook of the pinning plate 23 is welded to the H-beam 3 (3a) to withstand the strength. When assembling, the lift rod 20 and the lift 22 may be pulled down, and then the rope 24 may be pulled out and then the fixing pins 21 may be driven one by one. This ring may be provided on the H-beams 3 (3a) or may be installed on the plate between the H-beams 3 (3a). This ring is installed on both left and right sides to separate both places, and the rope 24 is discarded, and one side is alternately separated and one is fixed so that the rope 24 is removed when H (3) (3a) is removed. You can also let it fall out. In order to do this, it is important to remove the friction force between the rope 24 and the embedded soil or rubbish, so that the outer surface of the rope 24 is covered with a tube or the like so that the soil and the rope 24 do not directly contact each other.

The landfill of the present invention, first, because there is no worry of odor due to the leachate, the leachate is completely recycled to solve the leachate problem while promoting a bio-reaction.

Second, because the high-rise landfill is essential, the gas generated is not only taken out completely, but the inside can be sufficiently vacuumed by the sealing device on the surface, so there is no need to install a vertical pipe or hole for gas extraction. Do.

Third, because there is a waterproof layer on the surface, there is no effluent gas or pollutant discharge to the outside, and there is no risk of water seeping from the outside, so it is very advantageous in terms of land use because there is no problem in farming without worrying about pollution immediately after landfilling.

Fourth, the cost of making vertical banks for leachate treatment and gas extraction is economical and clean landfills are possible because of the conventional sandwich type soil filling and wall savings for building walls.

Fifth, since the landfill work is carried out in a small area, it is possible to fundamentally solve the pollution, such as dust generated during landfill, and the leachate problem that is concerned during rainfall.

Claims (5)

Landfills are built in vertically formed banks, and a gravel layer is formed on top of them to improve air permeability. Between the gravel layers, leachate injection pipes and gas intake perforated pipes are installed from the lower side, staggered from each other. To cover the reinforcing film and the waterproofing film, and then cover the soil and recycle the leachate and leach gas The method of constructing a landfill site that combines leachate recirculation and gas extraction by installing temporary temporary membranes other than the concrete retaining walls to be permanently maintained so that the temporary membranes can be reused as soon as the landfill ends. The method of claim 1, wherein the double retaining wall is formed of concrete or the like to fill soil therein to form a proper height, and a plurality of retaining walls are formed at a predetermined interval by a tension support low-off made of geotextile to form a permanent fixed bank. Method of constructing landfill with both leachate recirculation and gas extraction, which forms a temporary temporary film made of H-beam and iron plate or wood, and binds it with binding wire. The leachate recirculation and gas extraction according to claim 1, wherein the lower end of the embankment can be installed on both sides according to the strength, and when pulled from the upper side, the pin is pulled out to separate the rope and the H-beam to reuse the H-beam. Landfill site The method of claim 1, wherein a rope is placed on the outer shell shell so that the rope can be easily reused by peeling only one ring so that the rope can be reused.

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