KR20000040625A - Rainwater tent with excellent functions of preventing rainwater and collecting reclaiming gas for waste reclaiming land and reclaiming method thereof - Google Patents

Abstract

PURPOSE: A rainwater tent is provided to effectively block and discharge rainwater flowed from ground and to effectively collect reclaiming gas. CONSTITUTION: A rainwater tent(300) is installed on a sand layer. Herein, a rainwater collecting portion(320) of the rainwater tent is wrapped by an unwoven fabric for preventing sand or other foreign materials from being flowed into the rainwater aperture in the rainwater collecting portion while easily flowing the rainwater. Then, another sand layer is formed on the rainwater tent for the rainwater, which is flowed from ground, to be easily flowed into the rainwater collecting portion while protecting the rainwater tent. And, the surface of ground is formed on the second sand layer for planting. Moreover, the rainwater collecting portion is connected to a treating equipment of leachate for continuously discharging the collected rainwater to the treating equipment of leachate.

Description

Rainfall membrane for waste landfill with excellent rainfall prevention and landscaping ability and landfilling method using the same

The present invention relates to a rainwater film that can prevent rainwater from penetrating into a landfill and to effectively collect landfill gas generated in the landfill, and a landfill method using the rainwater film.

In recent years, industrialized countries and other countries have invested tremendous funds and efforts to heal the pollution environment caused by unplanned waste disposal in the past. For example, in the United States, the United States has established a legal system and has undergone extensive cleanup since 1980s to purify soil and groundwater contaminated by indiscriminate landfilling or dumping of hazardous waste, while prohibiting indiscriminate landfilling of hazardous waste. In order to prevent accidents such as leakage of leachate from the surrounding area to the surrounding area, various measures are being sought.

Even with the global trend, it is important to treat waste safely in advance so that the environment is not polluted.In particular, if there is a high dependence on landfill, such as our country, groundwater or water quality will not be contaminated by leachate from landfill. Safe landfilling of wastes is an important part of environmental policy.

Waste is largely divided into general waste and designated (industrial) waste, and the general waste is buried in the managed landfill 100 shown in FIG. 1 (a), and the designated waste is a blocked landfill (shown in FIG. 1 (b)). Buried in 200).

As shown in FIG. 1 (a), the managed landfill site 100 forms a sand layer 102 on the floor and installs a water repellent film 106 to block the leachate 104 that is sucked into the ground above it and then thereon. The clay layer 108 and the gravel layer 110 are formed, and the leachate collection pipe 112 is embedded between the gravel layers 110. On the gravel layer 110, a nonwoven fabric 114 is installed to facilitate the collection of the leachate 104 and to prevent the inflow of foreign substances, and then to form the sand layer 102 again, the waste 116 and the intermediate cover layer 118 ) Is sequentially buried and the final covering material 120 is formed to a thickness of about 50 cm thereon. The intermediate cover layer 118 is formed to a thickness of 30 cm on the waste of about 3 meters to prevent the scattering of the waste on the waste 116.

In order to prevent the leachate from leaking into the surrounding area, the waste landfill is collected by the leachate collection pipe and discharged to the leachate treatment facility (not shown). By the way, the amount of leachate generated in the landfill is mostly due to rainwater rather than from the waste. That is, as shown in Figure 1 (a), because the final cover material (soil) is treated by a simple compaction method to the thickness of about 50cm or more on the top of the landfill layer, so the amount of leachate in the summer rainy season or snowy winter is increased. do. Therefore, the waste treatment facility has a large treatment capacity in consideration of the amount of leachate generated due to rainwater, and thus there is a problem that the treatment facility requires more than necessary.

In addition, as shown in FIG. 1 (b), the blocking type landfill site 200 for embedding hazardous wastes embeds the waste 220 in a concrete 210 space having a predetermined volume and forms a slate roof 230 thereon. This prevents the leachate from entering the surface and blocks the inflow of rainwater.

Neither the above mentioned managed landfills nor blocked landfills are able to utilize the landfill surface efficiently. That is, the amount of landfill gas 122 generated from the landfill waste shows a maximum value up to 5 years after the end of landfill, and gradually decreases, and does not occur after 20 years. The landfill gas thus generated is simply discharged into the atmosphere to increase air pollution, and if there is a ember around it, it leads to a fire, which makes it difficult to effectively deal with it. For this reason, the surface of the landfill will not be used for 20 years and will be left as it is.

The present inventors have made continuous research and efforts to solve the problems of the conventional landfill described above, it is confirmed that the problem can be solved by effectively blocking the rainwater and effectively collecting and discharging the landfill gas and propose the present invention. Reached.

It is an object of the present invention to provide a rainwater film that can effectively block rainwater flowing from the ground surface and discharge it, and furthermore, to efficiently collect landfill gas.

In addition, the present invention is to provide a landfill method that can be used to prevent rainwater and to efficiently collect the landfill gas using the rain film of the present invention, there is another object.

1 is a cross-sectional view of a conventional landfill,

1 (a) shows a managed landfill

Figure 1 (b) is a blocked landfill

2 is an example of the excellent film of the present invention

Figure 3 is a detailed view of the storm water collecting unit of the present invention

Figure 4 is an example of the landfill using the rain film of the present invention

Excellent film of the present invention for achieving the above object,

A body inclined downward from the center to the edge,

Rainwater collection unit is installed on the edge of the body to collect and discharge rainwater;

At least one or more is installed in the central portion of the body comprises a gas discharge portion for discharging the landfill gas.

The present invention for achieving another object, in the landfill method of sequentially filling the waste and the cover material in the landfill and form a final cover layer,

Forming an aggregate layer on the final covering layer;

Forming a sand layer on the aggregate layer;

Installing the rain film of the present invention on the sand layer;

Forming a sand layer on the rain film and forming an earth layer; is configured to include.

Hereinafter, the present invention will be described with reference to the drawings.

[Excellent membrane for waste landfill]

The rain film of the present invention, as shown in FIG. 2 (a), includes a body 310, a rain catcher 320, and a gas exhauster 330.

The body 310 has a structure inclined downward from the center portion to the edge side. This is to drain the rainwater that is sucked into the body to the edge. The angle of inclination (Ø) of the body formed at the center due to the inclined edge can be made constant, which is discharged with rainwater, and the rainwater film is applied to the landfill and sand is formed over the rainwater film. You can set a certain angle so that it does not flow down. In one embodiment it may be 160-170 °.

The shape of the body can be variously changed depending on the landfill to be installed, for example, there is a shape such as a square, a circle. In addition, the material of the body may be a material having elasticity and strength capable of withstanding an appropriate load. For example, high density polyethylene (HDPE) may be used as the material, and in this case, the thickness may be about 1.5 mm and a tensile strength of 260 kgf / cm ² or more. When the body is made of high density polyethylene, the body can be made of two plates of a certain size (for example, a plate about 700 cm long on one side). The method of joining the two plates can be double welded using an overlap welding tool by the hot melting method, and the width of the overlapping chip portion can be about 30 ~ 60cm.

The rainwater collecting part 320 collects and discharges rainwater flowing down by being connected and installed at the edge of the body. More preferably, the rainwater collecting unit 320 in the present invention may have a shape shown in Figure 2 (a). That is, the rainwater collecting part is a pipe, and a plurality of rainwater holes 322 are formed at a portion of the upper position than the center part thereof, and the rainwater flowing down from the body 310 can be collected and discharged into the inside of the pipe. In one embodiment, the rain catcher 320 may be a pipe having a diameter of about 300 mm, and a plurality of rain balls having a diameter of about 30 mm are formed at a position above the center of the pipe, and the rain drops may be spaced about 100 mm apart in the longitudinal direction of the pipe. Can be formed.

At least one gas discharge part 330 may be installed at a central portion of the body to discharge the landfill gas. Of course, it is possible to install the gas discharge anywhere in the body, but because the structure of the body has a structure inclined downward with respect to the center portion of the center is preferably installed in the center as possible as possible concentrated in the center of the vertex. In one embodiment, the gas discharge portion may be made of PVC as a tube, the diameter may be ø300 ~ 500mm. The landfill gas discharge pipe may be connected to the overlapping chip portion of the body every 10m. The connection at this time is possible by welding.

The rain film provided in accordance with the present invention may be applied to a managed landfill or a block landfill, and this rain film of the present invention has been described in detail herein as one of the preferred embodiments and shown in the accompanying drawings, but the present invention is such a detailed embodiment. It should be understood that various changes and modifications are not to be construed as being limited to the scope of the present invention without departing from the spirit or scope of the present invention.

[Reclamation method of landfill using waste film of the present invention]

A method of embedding the rain film of the present invention as described above in a landfill is described next with reference to FIG. 3, which is an example of a managed landfill.

As shown in FIG. 3, the waste film 116 and the cover material 118 are alternately embedded in the landfill and the rain film of the present invention is installed on the final cover layer 120 formed thereon. When the present invention is applied to a managed landfill, the landfill method may be performed according to a conventional method before the final cover layer, and the same applies to the case of applying to a landfill.

First, the aggregate layer 410 is buried on the final covering layer 120, the landfill gas can be discharged smoothly, for example, there is gravel. As another example, slag generated in a steel mill may be used. In one embodiment, the aggregate layer may form an aggregate of about 30 cm in size about 30-50. The sand layer 420a is formed on the aggregate layer 410, which protects the rainwater film provided thereon and facilitates the collection of landfill gas rising from the bottom layer. In one embodiment, the sand layer 420a may be formed to a thickness of about 20 cm.

The rain film 300 of the present invention is installed on the sand layer 420a formed as described above. At this time, the rainwater collecting part 320 of the rainwater film 300 is a rainwater hole 322 formed in the rainwater collecting part 320 by wrapping it with a nonwoven fabric 430 to prevent sand or other foreign matter from being mixed with rainwater. Allow it to flow

The sand layer 320b is formed on the rain film 300 again to facilitate the protection of the rain film 300 and the rainwater flowing from the ground surface into the water collecting part 320. The ground surface 440 is formed of soil on the sand layer to enable landscaping through planting and the like on the landfill. In addition, the rainwater collecting unit 320 may be connected to the leachate treatment facility to continue to discharge the rainwater collected to the leachate treatment facility.

As such, when the waste is landfilled according to the landfill method of the present invention, the leachate in the landfill layer is collected through the leachate collecting pipe located at the bottom of the landfill, and the rainwater is effectively collected and collected through the rainwater collecting pipe. It may be collected and discharged through the upper landfill gas outlet. This collected landfill gas can be treated by appropriate combustion.

As described above, the present invention may enable efficient collection and use of landfill discharged landfill gas, prevent rainwater from flowing into the landfill, and significantly reduce the amount of leachate to reduce the leachate treatment capacity. In addition, when the above method is applied to a block type landfill which is a designated waste landfill, facility costs can be reduced, and the land can be effectively used through planting on the land of the landfill as well as preventing rainwater.

Claims (6)

A body inclined downward from the center to the edge, Rainwater collection unit is installed on the edge of the body to collect and discharge rainwater; Rainproof membrane for excellent landfill and excellent rain prevention and landscaping collection consisting of a gas discharge unit is installed at least one or more in the central portion of the body to discharge the landfill gas. The rain film according to claim 1, wherein the body is made of high density polyethylene. The rain film according to claim 1, wherein one side of the central catchment unit is integrally formed at an edge of the body, and a plurality of rain drops are formed at a portion of the upper part of the rain catcher. In the landfill method of sequentially filling the waste and the cover material in the landfill and forming the final cover layer, Forming an aggregate layer on the final covering layer; Forming a sand layer on the aggregate layer; Installing the rain film of claim 1 on the sand layer; Forming a layer of sand on the rain film and forming a soil layer; landfill method of the excellent landfill site of excellent waste prevention and landfill gas capture, characterized in that comprises a. The landfill method according to claim 4, wherein the aggregate layer is a gravel layer having a diameter of 30-50 mm. The landfill method according to claim 4, wherein a nonwoven fabric is provided between the rainwater collecting portion and the sand layer of the rainwater film.