Leachate guide and drainage blind ditch

Abstract

The utility model discloses a leachate guiding and draining blind ditch, which comprises a plastic core layer, an HDPE (high-density polyethylene) framework layer and a geotechnical cloth outer film layer from inside to outside in sequence, the porosity of the plastic core layer is not lower than 80%, and the HDPE framework layer comprises longitudinal convex ribs annularly distributed on the outer side of the plastic core layer and arc-shaped connecting ribs connected among the longitudinal convex ribs at intervals. The leachate guide and drainage blind ditch has the advantages of being not prone to deformation, high in water permeability, good in water conductivity and the like, and can effectively improve the guide and drainage smoothness of landfill leachate and reduce the residence time of the landfill leachate, so that the collection efficiency of the landfill leachate is effectively improved, and the probability that the guide and drainage blind ditch is blocked by fine impurity particles is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of garbage treatment, in particular to a blind drainage ditch for leachate. Background Art

[0002] At present, the leachate from solid waste landfills is mainly collected and discharged from the landfill area through a leachate drainage system pre-buried at the bottom of the solid waste landfill. The leachate drainage system mainly includes blind ditches and perforated flower pipes arranged in the blind ditches. The flower pipes are wrapped with non-woven geotextiles, and gravel is filled in the flower pipes wrapped with geotextiles and the blind ditches to form a complete leachate collection and drainage system. Due to the large contact area between the geotextile and the flower pipes in the existing drainage pipes, with long-term use, fine impurity particles in solid waste or soil layers gradually accumulate, causing the drainage system to be easily blocked, resulting in the inability to discharge the leachate smoothly. The accumulated leachate exerts tremendous pressure on the artificial anti-seepage system. Once the anti-seepage system is damaged, the entire landfill project will become the most serious source of pollution that damages the environment. Utility Model Content

[0003] The utility model aims to provide a leachate drainage blind ditch to solve the problems existing in the prior art.

[0004] The purpose of the utility model is achieved as follows: A leachate drainage blind ditch comprises, from the inside to the outside, a plastic core layer, a HDPE skeleton layer and a geotextile outer film layer, the porosity of the plastic core layer is not less than 80%, and the HDPE skeleton layer comprises longitudinal ribs annularly arranged on the outside of the plastic core layer and arc-shaped connecting ribs spaced apart and connected between the longitudinal ribs.

[0005] The leachate drainage blind ditch of the utility model improves the patency of leachate drainage by adopting a plastic core layer with high permeability, and avoids the reduction of the porosity of the plastic core layer caused by excessive pressure on the diversion layer of the landfill by arranging a specially designed skeleton layer, and at the same time increases the space between the plastic core layer and the geotextile outer film layer, thereby improving the leachate drainage efficiency between the two. In summary, the leachate drainage blind ditch of the utility model has the advantages of not being easy to deform, strong permeability, and good water conductivity. It can effectively improve the patency of garbage leachate drainage and reduce the retention time of garbage leachate, thereby effectively improving the collection efficiency of garbage leachate and reducing the probability of fine impurity particles blocking the drainage blind ditch.

[0006] As a further improvement of the utility model, the plastic core layer includes an inner core layer and an outer core layer, and the porosity of the inner core layer is greater than that of the outer core layer, thereby ensuring the directional flow discharge of the leachate and further improving the drainage efficiency of the leachate.

[0007] As a further improvement of the utility model, the porosity of the inner core layer is greater than 90%, and the porosity of the outer core layer is between 80-85%, thereby ensuring smooth discharge of the leaked liquid.

[0008] As a further improvement of the utility model, the inner diameter of the inner core layer is 300 mm, and the thickness of the inner core layer and the outer core layer is 10-20 mm, so as to ensure the drainage efficiency of the leachate.

[0009] As a further improvement of the utility model, the arc-shaped connecting ribs between adjacent longitudinal convex ribs are staggered to reduce the influence of the arrangement of the arc-shaped connecting ribs on the drainage of the leaked liquid.

[0010] As a further improvement of the utility model, the thickness of the HDPE skeleton layer is 10-20 mm, and the width of the longitudinal ribs is 15-30 mm, which can avoid affecting the drainage efficiency of the leachate while ensuring the strength.

[0011] As a further improvement of the utility model, radial water-permeable holes are provided on the longitudinal convex ribs and / or the arc-shaped connecting ribs to further improve the drainage efficiency of the leachate.

[0012] As a further improvement of the present invention, the plastic core layer and the HDPE skeleton layer both adopt a segmented structure and are connected by electric hot-melt, and the connection positions of adjacent segments of the plastic core layer and the connection positions of adjacent segments of the HDPE skeleton layer are staggered. The connection method is simple and reliable, and the staggered connection method reduces the impact on the drainage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the blind ditch for drainage of leachate of the utility model.

[0014] Among them, 1 is the inner core layer, 2 is the outer core layer, 3 is the longitudinal convex ribs, 4 is the arc-shaped connecting ribs, and 5 is the geotextile outer membrane layer. DETAILED DESCRIPTION

[0015] like Figure 1 The leachate drainage blind ditch shown comprises, from the inside to the outside, a plastic core layer, a HDPE skeleton layer and a geotextile outer membrane layer 5 .

[0016] The plastic core layer is formed by curling, entanglement and bonding of plastic filaments. The plastic core layer includes an inner core layer 1 and an outer core layer 2, and the porosity of the inner core layer 1 is greater than that of the outer core layer 2. In this embodiment, the porosity of the inner core layer 1 is greater than 90%, and the porosity of the outer core layer 2 is between 80-85%, which ensures the directional flow discharge of the leachate and improves the drainage efficiency of the leachate. The inner diameter of the inner core layer 1 is 300mm, and the thickness of the inner core layer 1 and the outer core layer 2 is 10-20mm, which ensures the drainage efficiency of the leachate.

[0017] The HDPE skeleton layer includes longitudinal ribs 3 arranged around the outside of the plastic core layer and arc-shaped connecting ribs 4 spaced and connected between the longitudinal ribs 3. The thickness of the HDPE skeleton layer is 10-20 mm, and the width of the longitudinal ribs 3 is 15-30 mm, which can ensure the drainage efficiency of the leachate as much as possible while ensuring the strength. The arc-shaped connecting ribs 4 between adjacent longitudinal ribs 3 are staggered to reduce the influence of the setting of the arc-shaped connecting ribs 4 on the drainage of the leaked liquid. Furthermore, radial permeable holes (not shown) can also be set on the longitudinal ribs 3 and / or the arc-shaped connecting ribs 4 to further improve the drainage efficiency of the leachate.

[0018] The plastic core layer and the HDPE skeleton layer both adopt a segmented structure and are connected by electric hot-melt. The connection positions of adjacent segments of the plastic core layer and the connection positions of adjacent segments of the HDPE skeleton layer are staggered. The connection method is simple and reliable, and the staggered connection method reduces the impact on the drainage efficiency.

[0019] The leachate drainage blind ditch of the present embodiment has the advantages of being not easy to deform, having strong water permeability and good water conductivity, etc. It can effectively improve the drainage smoothness of the garbage leachate and reduce the retention time of the garbage leachate, thereby effectively improving the collection efficiency of the garbage leachate and reducing the probability of small impurity particles blocking the drainage blind ditch.

[0020] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. A blind drainage ditch for leachate, characterized in that: From the inside to the outside, it includes a plastic core layer, a HDPE skeleton layer and a geotextile outer film layer. The porosity of the plastic core layer is not less than 80%. The HDPE skeleton layer includes longitudinal ribs arranged on the outside of the plastic core layer and arc-shaped connecting ribs spaced apart and connected between the longitudinal ribs.

2. The leachate drainage blind ditch according to claim 1, characterized in that: The plastic core layer comprises an inner core layer and an outer core layer, and the void ratio of the inner core layer is greater than that of the outer core layer.

3. The leachate drainage blind ditch according to claim 2, characterized in that: The porosity of the inner core layer is greater than 90%, and the porosity of the outer core layer is between 80-85%.

4. The leachate drainage blind ditch according to claim 2, characterized in that: The inner diameter of the inner core layer is 300 mm, and the thickness of the inner core layer and the outer core layer is 10-20 mm.

5. The leachate drainage blind ditch according to claim 1, characterized in that: The arc-shaped connecting ribs between adjacent longitudinal convex ribs are staggered.

6. The leachate drainage blind ditch according to claim 5, characterized in that: The thickness of the HDPE skeleton layer is 10-20 mm, and the width of the longitudinal rib is 15-30 mm.

7. The leachate drainage blind ditch according to claim 5, characterized in that: The longitudinal convex ribs and / or the arc-shaped connecting ribs are provided with radial water-permeable holes.

8. The leachate drainage blind ditch according to any one of claims 1 to 7, characterized in that: The plastic core layer and the HDPE skeleton layer both adopt a segmented structure and are connected by electric hot melting, and the connection positions of adjacent segments of the plastic core layer and the connection positions of adjacent segments of the HDPE skeleton layer are staggered.

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