Landfill structure with efficient anti-seepage function for hazardous waste treatment

Abstract

The utility model relates to the technical field of hazardous waste treatment, discloses a landfill structure for hazardous waste treatment with an efficient anti-seepage function, and solves the problem of soil and water resource pollution caused by water seepage of an existing landfill structure for hazardous waste treatment. The system comprises a base layer, a first inverted filter layer, an underground water diversion layer, a first anti-seepage system layer, a leachate detection layer, a second anti-seepage system layer, a leachate diversion layer and a second inverted filter layer, the first inverted filter layer is located at the top end of the base layer, the underground water diversion layer is located at the top end of the first inverted filter layer, the first anti-seepage system layer is located at the top end of the underground water diversion layer, and the leachate detection layer is located at the top end of the leachate diversion layer. The leachate detection layer is located at the top end of the first anti-seepage system layer, the second anti-seepage system layer is located at the top end of the leachate detection layer, the leachate flow guide layer is located at the top end of the second anti-seepage system layer, and the second inverted filter layer is located at the top end of the leachate flow guide layer. By means of the landfill structure, the anti-seepage effect can be effectively improved, and pollution to soil and water resources is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of hazardous waste treatment, in particular to a landfill structure for hazardous waste treatment with a high-efficiency anti-seepage function. Background Art

[0002] Hazardous waste refers to waste included in the national hazardous waste list or identified as having hazardous waste characteristics according to the national hazardous waste identification standards and identification methods. It usually needs to be landfilled. The development of safe landfills in my country started relatively late, and there is a serious deviation in the understanding of hazardous waste landfill technology. After landfill, hazardous waste cannot undergo fermentation reactions like domestic waste, and basically requires a long-term and effective anti-seepage environment. During the inspection process, it was found that the average number of holes per hectare in my country's existing hazardous waste landfills reached 17 in 2014, and a considerable number of holes were very large. Leakage in landfills is common, which in turn causes a large amount of land and water resource pollution. How to improve the anti-seepage effect of landfill structures is an urgent problem to be solved. Therefore, the present application proposes a landfill structure for hazardous waste treatment with high-efficiency anti-seepage function. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a landfill structure for hazardous waste treatment with high-efficiency anti-seepage function, which effectively solves the problem of soil and water resource pollution caused by water seepage in the existing landfill structure for hazardous waste treatment.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a landfill structure for hazardous waste treatment with high-efficiency anti-seepage function, comprising a base layer, a first anti-filtration layer, a groundwater diversion layer, a first anti-seepage system layer, a leachate detection layer, a second anti-seepage system layer, a leachate diversion layer and a second anti-filtration layer, wherein the first anti-filtration layer is located at the top of the base layer, the groundwater diversion layer is located at the top of the first anti-filtration layer, the first anti-seepage system layer is located at the top of the groundwater diversion layer, the leachate detection layer is located at the top of the first anti-seepage system layer, the second anti-seepage system layer is located at the top of the leachate detection layer, the leachate diversion layer is located at the top of the second anti-seepage system layer, and the second anti-filtration layer is located at the top of the leachate diversion layer.

[0005] Preferably, the first anti-seepage system layer consists of a first anti-seepage layer, a first upper protective layer and a first lower protective layer, and the first upper protective layer and the first lower protective layer are respectively located at the top and bottom ends of the first anti-seepage layer.

[0006] Preferably, the second anti-seepage system layer is composed of a second anti-seepage layer, a second upper protective layer and a second lower protective layer, the second upper protective layer and the second lower protective layer are respectively located at the top and bottom of the second anti-seepage layer, the thickness of the first lower protective layer is greater than the thickness of the second lower protective layer, and the first anti-seepage layer and the second anti-seepage layer are both composite anti-seepage structures formed by high-density polyethylene geomembrane and bentonite waterproof blanket.

[0007] Preferably, an anti-seepage reinforcement connector is provided at the joints of the first anti-seepage layer and the second anti-seepage layer, and the anti-seepage reinforcement connector is composed of a top anti-seepage covering layer, a bottom anti-seepage supporting layer and an intermediate connector, and the top anti-seepage covering layer and the bottom anti-seepage supporting layer are fixedly connected to the top and bottom ends of the intermediate connector respectively, and a number of connecting grooves matching the first anti-seepage layer and the second anti-seepage layer are formed between the top anti-seepage covering layer, the bottom anti-seepage supporting layer and the intermediate connector, and the side edges of the top end of the top anti-seepage covering layer and the side edges of the bottom end of the bottom anti-seepage supporting layer are both arc-shaped structures.

[0008] Preferably, a leachate collecting trough is provided at the bottom end of the leachate guiding layer, and a leachate discharge pipe is laid inside the leachate collecting trough.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] (1) During operation, by providing a base layer, a first anti-filtration layer, a groundwater diversion layer, a first anti-seepage system layer, a leachate detection layer, a second anti-seepage system layer, a leachate diversion layer and a second anti-filtration layer, the overall anti-seepage effect can be improved, and the leachate can be prevented from entering the soil and groundwater, thereby preventing the pollution of the soil and groundwater. At the same time, the groundwater can also be prevented from entering the interior of the hazardous waste, thereby reducing the generation of leachate. By providing a first anti-seepage system layer composed of a first anti-seepage layer, a first upper protective layer and a first lower protective layer, and a second anti-seepage system layer composed of a second anti-seepage layer, a second upper protective layer and a second lower protective layer, double-layer anti-seepage can be achieved, and at the same time, protection can be formed for the first anti-seepage layer and the second anti-seepage layer to prevent them from being damaged;

[0011] (2) By providing an anti-seepage reinforcement connector composed of a top anti-seepage covering layer, a bottom anti-seepage support layer and an intermediate connector, it is possible to achieve a reinforced connection at the interface when the first anti-seepage layer and the second anti-seepage layer are laid, thereby improving the stability of the connection at the interface and further improving the anti-seepage effect at the interface. By providing a leachate collection trough and a leachate discharge pipe, the generated leachate can be collected and discharged, thereby facilitating the treatment of the leachate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0013] In the attached picture:

[0014] Figure 1 This is a schematic diagram of a landfill structure for hazardous waste treatment with a high-efficiency anti-seepage function according to the utility model;

[0015] Figure 2 Practical Figure 1 A partial enlarged view of the middle A;

[0016] Figure 3 This is a schematic diagram of the structure of the first anti-seepage system layer of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the second anti-seepage system layer of the utility model;

[0018] Figure 5 This is a schematic diagram of the connection structure between the first anti-seepage layer and the anti-seepage reinforcement connector of the utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the anti-seepage reinforcement connector of the utility model;

[0020] In the figure: 1. foundation layer; 2. filter layer one; 3. groundwater diversion layer; 4. first anti-seepage system layer; 5. leachate detection layer; 6. second anti-seepage system layer; 7. leachate diversion layer; 8. anti-filtration layer two; 9. first anti-seepage layer; 10. first upper protective layer; 11. first lower protective layer; 12. second anti-seepage layer; 13. second upper protective layer; 14. second lower protective layer; 15. anti-seepage reinforcement connector; 16. top anti-seepage covering layer; 17. bottom anti-seepage support layer; 18. middle connector; 19. connecting trough; 20. leachate collecting trough; 21. leachate discharge pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] Depend on Figure 1The utility model provides a landfill structure for hazardous waste treatment with a high-efficiency anti-seepage function, comprising a base layer 1, a filter layer 2, a groundwater diversion layer 3, a first anti-seepage system layer 4, a leachate detection layer 5, a second anti-seepage system layer 6, a leachate diversion layer 7 and a filter layer 2 8, wherein the filter layer 2 is located at the top of the base layer 1, the groundwater diversion layer 3 is located at the top of the filter layer 2, the first anti-seepage system layer 4 is located at the top of the groundwater diversion layer 3, the leachate detection layer 5 is located at the top of the first anti-seepage system layer 4, the second anti-seepage system layer 6 is located at the top of the leachate detection layer 5, the leachate diversion layer 7 is located at the top of the second anti-seepage system layer 6, and the filter layer 2 8 is located at the top of the leachate diversion layer 7;

[0023] The groundwater diversion layer 3 diverts the groundwater, the first anti-seepage system layer 4 and the second anti-seepage system layer 6 can play an anti-seepage effect to prevent the leachate from penetrating into the groundwater and the soil, and the leachate diversion layer 7 can divert the leachate to prevent the leachate from accumulating and being difficult to discharge;

[0024] Depend on Figure 1 , Figure 3 and Figure 4 It is given that the first anti-seepage system layer 4 is composed of a first anti-seepage layer 9, a first upper protective layer 10 and a first lower protective layer 11, the first upper protective layer 10 and the first lower protective layer 11 are respectively located at the top and the bottom of the first anti-seepage layer 9, the second anti-seepage system layer 6 is composed of a second anti-seepage layer 12, a second upper protective layer 13 and a second lower protective layer 14, the second upper protective layer 13 and the second lower protective layer 14 are respectively located at the top and the bottom of the second anti-seepage layer 12, the thickness of the first lower protective layer 11 is greater than the thickness of the second lower protective layer 14, and the first anti-seepage layer 9 and the second anti-seepage layer 12 are both composite anti-seepage structures formed by high-density polyethylene geomembrane and bentonite waterproof blanket;

[0025] By providing a double-layer anti-seepage structure consisting of a first anti-seepage layer 9 and a second anti-seepage layer 12, the anti-seepage effect can be improved, that is, the leachate can be prevented from entering the groundwater, and the groundwater can be prevented from entering the interior of the hazardous waste. The first upper protective layer 10 and the first lower protective layer 11 can protect the first anti-seepage layer 9, and the second upper protective layer 13 and the second lower protective layer 14 can protect the second anti-seepage layer 12, thereby preventing the first anti-seepage layer 9 and the second anti-seepage layer 12 from being damaged.

[0026] Depend on Figures 3 to 6It is shown that the joints of the first impermeable layer 9 and the second impermeable layer 12 are both provided with an impermeable reinforcement connector 15, which is composed of a top impermeable covering layer 16, a bottom impermeable support layer 17 and an intermediate connector 18. The top impermeable covering layer 16 and the bottom impermeable support layer 17 are respectively fixedly connected to the top and bottom ends of the intermediate connector 18, and a plurality of connection grooves 19 matching the first impermeable layer 9 and the second impermeable layer 12 are formed between the top impermeable covering layer 16 and the bottom impermeable support layer 17 and the intermediate connector 18, and the side edges of the top end of the top impermeable covering layer 16 and the side edges of the bottom end of the bottom impermeable support layer 17 are both arc-shaped structures;

[0027] The first impermeable layer 9 and the second impermeable layer 12 are formed by splicing multiple pieces during installation, and leakage is more likely to occur at the splicing point. The impermeable reinforcing connector 15 composed of the top impermeable covering layer 16, the bottom impermeable supporting layer 17 and the intermediate connector 18 can reinforce the splicing point of the first impermeable layer 9 and the second impermeable layer 12, thereby improving the anti-seepage effect of the connection point.

[0028] Depend on Figure 1 and Figure 2 It is shown that a leachate collecting tank 20 is provided at the bottom of the leachate guiding layer 7, and a leachate discharge pipe 21 is laid inside the leachate collecting tank 20;

[0029] The leachate in the leachate guide layer 7 enters the leachate collecting tank 20 and then enters the leachate discharge pipe 21, thereby realizing the discharge of the leachate, facilitating the subsequent treatment of the leachate and avoiding the accumulation of leachate inside the landfill structure to increase the risk of infiltration.

[0030] In operation, by providing a base layer, a first anti-filtration layer, a groundwater diversion layer, a first anti-seepage system layer, a leachate detection layer, a second anti-seepage system layer, a leachate diversion layer and a second anti-filtration layer, the overall anti-seepage effect can be improved, and the leachate can be prevented from entering the soil and groundwater, thereby preventing the pollution of the soil and groundwater. At the same time, it can also prevent the groundwater from entering the interior of the hazardous waste, reducing the generation of leachate. By providing a first anti-seepage system layer composed of a first anti-seepage layer, a first upper protective layer and a first lower protective layer, and a second anti-seepage system layer composed of a second anti-seepage layer, a second upper protective layer and a second lower protective layer The second anti-seepage system layer can achieve double-layer anti-seepage, and at the same time can form protection for the first anti-seepage layer and the second anti-seepage layer to avoid damage; by setting an anti-seepage reinforcement connector composed of a top anti-seepage covering layer, a bottom anti-seepage supporting layer and an intermediate connector, it is possible to achieve a reinforced connection at the interface when the first anti-seepage layer and the second anti-seepage layer are laid, thereby improving the stability of the connection at the interface and further improving the anti-seepage effect at the interface; by setting a leachate collection trough and a leachate discharge pipe, the generated leachate can be collected and discharged, thereby facilitating the treatment of the leachate.

Claims

1. A landfill structure for hazardous waste treatment with high-efficiency anti-seepage function, comprising a base layer (1), a first anti-filtration layer (2), a groundwater diversion layer (3), a first anti-seepage system layer (4), a leachate detection layer (5), a second anti-seepage system layer (6), a leachate diversion layer (7) and a second anti-seepage layer (8), characterized in that: The first filter layer (2) is located at the top of the base layer (1), the groundwater diversion layer (3) is located at the top of the first filter layer (2), the first anti-seepage system layer (4) is located at the top of the groundwater diversion layer (3), the leachate detection layer (5) is located at the top of the first anti-seepage system layer (4), the second anti-seepage system layer (6) is located at the top of the leachate detection layer (5), the leachate diversion layer (7) is located at the top of the second anti-seepage system layer (6), and the second filter layer (8) is located at the top of the leachate diversion layer (7).

2. The landfill structure for hazardous waste treatment with high-efficiency anti-seepage function according to claim 1 is characterized in that: The first anti-seepage system layer (4) is composed of a first anti-seepage layer (9), a first upper protective layer (10) and a first lower protective layer (11), wherein the first upper protective layer (10) and the first lower protective layer (11) are respectively located at the top and bottom ends of the first anti-seepage layer (9).

3. The landfill structure for hazardous waste treatment with high-efficiency anti-seepage function according to claim 2 is characterized in that: The second anti-seepage system layer (6) is composed of a second anti-seepage layer (12), a second upper protective layer (13) and a second lower protective layer (14); the second upper protective layer (13) and the second lower protective layer (14) are respectively located at the top and bottom of the second anti-seepage layer (12); the thickness of the first lower protective layer (11) is greater than the thickness of the second lower protective layer (14); and the first anti-seepage layer (9) and the second anti-seepage layer (12) are both composite anti-seepage structures formed by high-density polyethylene geomembrane and bentonite waterproof blanket.

4. The landfill structure for hazardous waste treatment with high-efficiency anti-seepage function according to claim 3 is characterized in that: An anti-seepage reinforcement connector (15) is provided at the joint of the first anti-seepage layer (9) and the second anti-seepage layer (12). The anti-seepage reinforcement connector (15) is composed of a top anti-seepage covering layer (16), a bottom anti-seepage supporting layer (17) and an intermediate connector (18). The top anti-seepage covering layer (16) and the bottom anti-seepage supporting layer (17) are respectively fixedly connected to the top and bottom ends of the intermediate connector (18). A plurality of connection grooves (19) matching the first anti-seepage layer (9) and the second anti-seepage layer (12) are formed between the top anti-seepage covering layer (16), the bottom anti-seepage supporting layer (17) and the intermediate connector (18). The side edges of the top end of the top anti-seepage covering layer (16) and the side edges of the bottom end of the bottom anti-seepage supporting layer (17) are both arc-shaped structures.

5. The landfill structure for hazardous waste treatment with high-efficiency anti-seepage function according to claim 1 is characterized in that: A leachate collecting trough (20) is provided at the bottom end of the leachate guiding layer (7), and a leachate discharge pipe (21) is laid inside the leachate collecting trough (20).

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