Waste gas guiding and discharging system for solid waste landfill area

Abstract

The utility model belongs to the technical field of waste gas treatment, and mainly relates to a solid waste landfill area waste gas guiding and discharging system which comprises a leachate guiding and discharging unit, a waste gas guiding and discharging unit and a waste gas storage unit, the leachate guiding and discharging unit comprises a plurality of guiding and discharging main pipes and guiding and discharging branch pipes, and the guiding and discharging main pipes and the guiding and discharging branch pipes are arranged at the bottom of a landfill area. The waste gas guiding and discharging unit comprises a plurality of vertical gas guiding wells and gas guiding branch pipes; one end of the guide-discharge branch pipe is communicated with the guide-discharge main pipe, the other end of the guide-discharge branch pipe is communicated with the gas guide branch pipe, one end of the gas guide branch pipe is communicated with the guide-discharge branch pipe, and the other end of the gas guide branch pipe is communicated with the waste gas storage unit through the gas collecting pipe; and the vertical gas guide well is arranged above the discharge guide main pipe, the discharge guide branch pipe and the gas guide branch pipe. External air can be naturally guided into the landfill area through the vertical gas guide well and the leachate guide and discharge unit, the oxygen content in the landfill area is increased, and methane, hydrogen sulfide and other gases generated in an oxygen-free environment are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, and mainly relates to a waste gas discharge system for solid waste landfills. Background Technology

[0002] Solid waste landfills are centralized waste disposal sites using sanitary landfill methods. They typically employ a layered soil covering method, piling up layers of waste and then covering them with soil. However, during the landfill process, over time, the waste within the landfill ceases to produce harmful gases, wastewater, or leachate. Studies have shown that harmful gases produced in solid waste include methane, carbon dioxide, nitrogen, and hydrogen sulfide. If not treated promptly, these gases can not only pollute the environment but also potentially cause safety accidents such as explosions.

[0003] The prior art, such as the Chinese patent CN216092745U, provides a solid waste landfill exhaust gas collection device. By setting up pipelines under the landfill, the exhaust gas in the landfill is collected into a biogas storage tank through pressure setting and can prevent biogas backflow.

[0004] However, current technologies for treating waste gas in landfills mainly rely on extraction and collection, which cannot fundamentally solve the problem of waste gas generation in landfills. This leads to the need for continuous operation of waste gas treatment in landfills, increasing treatment costs. Utility Model Content

[0005] To address the technical problem that existing solid waste landfill exhaust systems cannot reduce exhaust gas generation, the technical solution of this utility model is achieved through the following methods:

[0006] A solid waste landfill waste gas drainage system includes a leachate drainage unit, a waste gas drainage unit, and a waste gas storage unit. The leachate drainage unit includes several main drainage pipes and branch drainage pipes, which are located at the bottom of the landfill. The waste gas drainage unit includes several vertical gas wells and branch gas pipes. One end of each branch drainage pipe is connected to the main drainage pipe, and the other end is connected to a branch gas pipe. One end of each branch gas pipe is connected to the branch drainage pipe, and the other end is connected to the waste gas storage unit via a gas collection pipe. The vertical gas wells are located above the main drainage pipes, branch drainage pipes, and branch gas pipes.

[0007] Furthermore, the branch pipes are symmetrically distributed on both sides of the main pipe, the main pipe has a diameter of 0.8 to 1 m and the spacing between the main pipes is 25.6 to 32 m; the branch pipes have a diameter of 0.4 to 0.6 m.

[0008] Furthermore, the vertical gas guide well is a gabion gas guide well or a borehole gas collection well. A venting pipe is installed inside the vertical gas guide well. One end of the venting pipe is connected to the main or branch pipe of the gas guide or the gas guide branch pipe, and the other end is connected to the waste gas storage unit through the gas collection pipe. The diameter of the vertical gas guide well is 0.8 to 1 m, and the diameter of the venting pipe is 0.1 to 0.2 m.

[0009] Furthermore, the air guide branch is a perforated air guide, and half of the air guide branch is provided with a vent hole, with the part of the branch with the vent hole facing downwards during installation.

[0010] Furthermore, the gas collection pipe is located around the landfill area, and a blower unit is installed at the connection point between one end of the gas collection pipe and the waste gas storage unit. The waste gas storage unit includes a transport pipe and a storage tank.

[0011] The beneficial effects of this utility model are:

[0012] This invention utilizes the temperature difference between the bottom of the landfill and the outside air. Through vertical air intakes and leachate drainage units, it naturally guides outside air into the landfill, increasing the oxygen content and reducing the production of gases such as methane and hydrogen sulfide caused by an oxygen-deprived environment. Simultaneously, the inclusion of a blower unit during exhaust gas extraction also introduces outside air into the landfill, maintaining proper ventilation within the landfill. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the arrangement structure of the leachate discharge unit and the waste gas discharge unit in this utility model;

[0014] Figure 2 This is a schematic diagram of the arrangement structure of the leachate discharge unit and the waste gas discharge unit of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of a solid waste landfill exhaust gas guiding system according to this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Main drainage pipe; 2. Branch drainage pipe; 3. Branch gas pipe; 4. Vertical gas well; 5. Gas collection pipe; 6. Ventilation pipe; 7. Blower unit; 8. Transport pipe; 9. Storage tank; 10. Landfill unit. Detailed Implementation

[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0020] The basics are as follows: Figure 1-3 As shown, this embodiment discloses a solid waste landfill exhaust gas drainage system, including a leachate drainage unit, an exhaust gas drainage unit, and an exhaust gas storage unit. The leachate drainage unit includes several main drainage pipes 1 and branch drainage pipes 2, with the branch pipes 2 symmetrically distributed on both sides of the main drainage pipes 1. In this embodiment, the number and diameter of the main drainage pipes 1 are determined according to the landfill area. In practical applications, the landfill is divided into several landfill units 10, with a center-to-center distance of 25.6–32 m between each landfill unit 10. Each landfill unit 10 contains one main drainage pipe 1, positioned in the middle of the unit. In this embodiment, the diameter of the main drainage pipe 1 is 1 m, and the diameter of the branch drainage pipes 2 is 0.4 m, both made of HDPE material. During installation, the main drainage pipe 1 and the branch drainage pipe 2 are buried underground in the landfill area. The main drainage pipe 1 and the branch drainage pipe 2 are generally installed at an angle, with the lower end of the branch drainage pipe 2 connected to the main drainage pipe 1 to facilitate the collection of leachate into the main drainage pipe 1.

[0021] In this embodiment, the waste gas guiding and exhaust unit includes several vertical air guiding wells 4 and air guiding branch pipes 3. The vertical air guiding wells 4 can be gabion air guiding wells or borehole gas collection wells. In this embodiment, gabion air guiding wells are selected. The air guiding gabions have a diameter of 0.8m and are made of graded stone materials. A ventilation pipe 6 is installed in the middle, and the outside is surrounded by metal mesh. The diameter of the ventilation pipe 6 is 0.2m. In this embodiment, the gabion air guiding wells are located above the main exhaust pipe 1 or the branch pipe 2, particularly at the connection between the main exhaust pipe 1 and the branch pipe 2. In this embodiment, the spacing between the gabion air guiding wells is approximately 15m.

[0022] In this embodiment, the gas guide branch pipe 3 is connected to the exhaust branch pipe 2 at one end via a through-pipe method, and the other end is connected to the waste gas storage unit via a gas collection pipe 5. The diameter of the gas guide branch pipe 3 is smaller than that of the exhaust branch pipe 2. The gas guide branch pipe 3 is a perforated gas guide pipe, and half of its pipe body is provided with ventilation holes. During installation, the pipe body with ventilation holes faces downwards to prevent solid waste from leaking into the gas guide branch pipe 3.

[0023] In this embodiment, the gas collecting pipe 5 is a circular pipe, which is arranged around the landfill unit 10 to collect the waste gas inside the landfill unit 10. The gas collecting pipe 5 is connected to the waste gas storage unit, and a blower unit 7 is provided at the connection point. The waste gas storage unit includes a transport pipe 8 and a storage tank 9. The gas collecting pipe 5 in each landfill unit 10 is connected to the transport pipe 8 to collect the waste gas into the storage tank 9.

[0024] In practical use, this invention utilizes the temperature difference between the bottom of the landfill and the outside air. Through the vertical air guide well 4 and the leachate drainage unit, it naturally guides outside air into the landfill, increasing the oxygen content and reducing the production of gases such as methane and hydrogen sulfide caused by an oxygen-deprived environment. Simultaneously, the inclusion of a blower unit 7 further introduces outside air into the landfill during exhaust gas extraction, maintaining proper ventilation within the landfill.

[0025] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A solid waste landfill area exhaust gas guiding and discharging system, comprising a leachate guiding and discharging unit, an exhaust gas guiding and discharging unit and an exhaust gas storage unit, characterized in that: The leachate drainage unit comprises a plurality of drainage main pipes (1) and drainage branch pipes (2), the drainage main pipes (1) and the drainage branch pipes (2) are arranged at the bottom of the landfill area, the waste gas drainage unit comprises a plurality of vertical gas guide wells (4) and gas guide branch pipes (3); one end of the drainage branch pipe (2) is communicated with the drainage main pipe (1), and the other end is communicated with the gas guide branch pipe (3); one end of the gas guide branch pipe (3) is communicated with the drainage branch pipe (2), and the other end is communicated with the waste gas storage unit through a gas collecting pipe (5); the vertical gas guide well (4) is arranged above the drainage main pipe (1), the drainage branch pipe (2) and the gas guide branch pipe (3).

2. The exhaust gas guiding system for solid waste landfill area according to claim 1, characterized in that: The drainage branch pipes (2) are symmetrically distributed on both sides of the drainage main pipe (1), the pipe diameter of the drainage main pipe (1) is 0.8-1m, and the spacing of the drainage main pipes (1) is 25.6-32m; the pipe diameter of the drainage branch pipe (2) is 0.4-0.6m.

3. The exhaust gas guiding system for solid waste landfill area according to claim 1, characterized in that: The vertical gas guide well (4) is a gabion gas guide well or a drilled gas collecting well, an air pipe (6) is arranged in the vertical gas guide well (4), one end of the air pipe (6) is communicated with the drainage main pipe (1) or the drainage branch pipe (2) or the gas guide branch pipe (3), and the other end is communicated with the waste gas storage unit through the gas collecting pipe (5); the diameter of the vertical gas guide well (4) is 0.8-1m, and the diameter of the air pipe (6) is 0.1-0.2m.

4. The exhaust gas guiding system for solid waste landfill area according to claim 1, characterized in that: The gas guide branch pipe (3) is a perforated gas guide pipe, half of the pipe body of the gas guide branch pipe (3) is provided with an air hole, and the pipe body provided with the air hole is installed downward.

5. The exhaust gas guiding system for solid waste landfill site as claimed in claim 1 wherein: The gas collecting pipe (5) is arranged around the landfill area, a blower set (7) is arranged at the connection between one end of the gas collecting pipe (5) and the waste gas storage unit, and the waste gas storage unit comprises a transport pipe (8) and a storage tank (9).

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