Exhaust device for bottom of oxidation pond

Abstract

The utility model relates to the technical field of sewage treatment, in particular to an exhaust device for the bottom of an oxidation pond. Comprising an oxidation pond, anti-seepage films are laid on the pond bottom and the pond wall of the oxidation pond, the edges of the anti-seepage films are fixed through anchoring grooves formed around the pond edge of the oxidation pond by a circle, a cobblestone layer is laid on the pond bottom of the oxidation pond and located below the anti-seepage films, exhaust pipes are horizontally buried in the cobblestone layer, and the two ends of each exhaust pipe are connected with connecting pipes; and an exhaust hole is formed in the exhaust pipe. The cobblestone layer is arranged at the bottom of the oxidation pond, and the exhaust pipe is horizontally arranged in the cobblestone layer, so that gas generated at the bottom of the pond can be more efficiently collected and exhausted, the exhaust efficiency is improved, and jacking damage to the impermeable membrane caused by accumulation of the gas at the bottom of the pond can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an exhaust device for the bottom of an oxidation pond. Background Technology

[0002] In the field of wastewater treatment, oxidation ponds are a commonly used treatment facility. During operation, various gases, such as biogas, are produced at the bottom of the pond due to factors such as microbial activity. To ensure the safe and stable operation of the oxidation pond and prevent the accumulation of gas at the bottom from causing damage to the geomembrane (i.e., to prevent the geomembrane from bulging and floating due to the accumulation of gas at the bottom), the venting device plays a crucial role.

[0003] Patent document (CN201620567646.2) discloses a venting device for the bottom of an oxidation pond in a ranch. The device includes a bedding layer, a foundation layer, embedded steel plates, a geomembrane, a venting pipe, and a support pipe. The geomembrane is laid on the pond bottom, with the bedding and foundation layers located underground. The foundation layer is placed on top of the bedding layer, and embedded steel plates are fixedly installed on top of the foundation layer. The bottom of the support pipe is fixedly connected to the embedded steel plates. The venting pipe is sleeved over the support pipe, with its upper part passing through the geomembrane to above the water surface of the oxidation pond. The geomembrane and the outer surface of the venting pipe are sealed together. The portion of the venting pipe not extending through the geomembrane has ventilation holes. This venting device, by using a support pipe and a venting pipe at the bottom of the pond, allows gas below the geomembrane to be discharged through the venting holes of the venting pipe, thus solving the problem of bulging at the bottom of the oxidation pond. However, the exhaust pipe is installed vertically at the bottom of the oxidation pond. Since the gas collection range of the vertical exhaust pipe is relatively limited, it can only discharge the gas in the surrounding area and cannot efficiently collect the gas generated in a large area at the bottom of the pond. As a result, the exhaust efficiency is low and the risk of gas accumulating at the bottom of the pond is still relatively high.

[0004] Therefore, an exhaust device for the bottom of an oxidation pond is designed to provide a technical solution to the above-mentioned technical problems. Utility Model Content

[0005] Therefore, it is necessary to provide an exhaust device for the bottom of an oxidation pond to address the aforementioned technical problems.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An exhaust device for the bottom of an oxidation pond includes an oxidation pond, wherein the bottom and walls of the oxidation pond are covered with an impermeable membrane, the edge of the impermeable membrane is fixed by an anchoring trench arranged around the edge of the oxidation pond, the bottom of the oxidation pond is covered with a pebble layer, the pebble layer is located below the impermeable membrane, an exhaust pipe is horizontally buried in the pebble layer, both ends of the exhaust pipe are connected to connecting pipes, and an exhaust hole is opened on the exhaust pipe.

[0008] In a preferred embodiment of the venting device for the bottom of an oxidation pond provided by this utility model, a non-woven geotextile is laid under the impermeable membrane, and the non-woven geotextile is located above the pebble layer.

[0009] As a preferred embodiment of the exhaust device for the bottom of an oxidation pond provided by this utility model, the outer surface of the exhaust pipe is wrapped with geotextile, and the weight of the geotextile is 150g / ㎡.

[0010] As a preferred embodiment of the exhaust device for the bottom of an oxidation pond provided by this utility model, the exhaust pipe is provided with multiple exhaust pipes, which are parallel to each other and evenly spaced.

[0011] In a preferred embodiment of the exhaust device for the bottom of an oxidation pond provided by this utility model, the distance between adjacent exhaust pipes is 15m.

[0012] As a preferred embodiment of the exhaust device for the bottom of an oxidation pond provided by this utility model, the pebble layer is formed by evenly spreading pebbles with a particle size of 20-40mm.

[0013] In a preferred embodiment of the exhaust device for the bottom of an oxidation pond provided by this utility model, both the exhaust pipe and the connecting pipe are UPVC pipes.

[0014] In a preferred embodiment of the exhaust device for the bottom of an oxidation pond provided by this utility model, the exhaust holes on the exhaust pipe are arranged in a quincunx pattern.

[0015] As a preferred embodiment of the exhaust device for the bottom of an oxidation pond provided by this utility model, the geomembrane is an HDPE double-sided smooth geomembrane, and the non-woven geotextile is a short-fiber needle-punched non-woven geotextile.

[0016] As a preferred embodiment of the exhaust device for the bottom of an oxidation pond provided by this utility model, the thickness of the HDPE double-sided geomembrane is 1.0 mm, and the weight of the short-fiber needle-punched nonwoven geotextile is 400 g / ㎡.

[0017] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0018] At the same time, through the above technical solutions, this utility model has at least the following beneficial effects:

[0019] 1. This utility model, by setting a pebble layer at the bottom of the oxidation pond and horizontally setting an exhaust pipe in the pebble layer, can more efficiently collect and discharge the gas generated at the bottom of the pond, improve the exhaust efficiency, and effectively prevent the gas from accumulating at the bottom of the pond and causing damage to the geomembrane.

[0020] 2. This utility model, through the reasonable arrangement and opening design of the exhaust pipe, can effectively collect the gas generated at various points on the bottom of the pond, further improving the exhaust efficiency.

[0021] 3. This utility model can prevent silt from clogging the exhaust pipe by wrapping geotextile on the outer surface of the exhaust pipe, making the exhaust more smooth. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a cross-sectional schematic diagram of the pebble layer of this utility model;

[0025] Figure 3 This is a schematic diagram of the anchoring trench of this utility model;

[0026] Figure 4 This is a schematic diagram of the exhaust pipe structure of this utility model.

[0027] In the diagram: 1. Earthwork; 2. Oxidation pond; 3. Geomembrane; 4. Vent pipe; 5. Pebble layer; 6. Non-woven geotextile; 7. Anchor trench; 8. Vent hole; 9. Connecting pipe. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] Reference Figures 1-4 An exhaust device for the bottom of an oxidation pond includes an oxidation pond 2. The bottom and walls of the oxidation pond 2 are covered with a geomembrane 3 to prevent sewage leakage. The edge of the geomembrane 3 is fixed by an anchoring trench 7 arranged around the edge of the oxidation pond 2. The bottom of the oxidation pond 2 is covered with a pebble layer 5, located below the geomembrane 3. An exhaust pipe 4 is horizontally embedded in the pebble layer 5, with connecting pipes 9 at both ends. Exhaust holes 8 are provided on the exhaust pipe 4. This invention, by setting a pebble layer 5 at the bottom of the oxidation pond 2 and horizontally arranging the exhaust pipe 4 within the pebble layer 5, can more efficiently collect and exhaust gases generated at the bottom of the pond, improving exhaust efficiency and effectively preventing gas accumulation at the bottom from causing damage to the geomembrane 3.

[0033] In this embodiment, oxidation pond 2 is opened on top of earthwork 1, anchoring trench 7 is opened on top of earthwork 1 and is set around the edge of oxidation pond 2, and connecting pipe 9 is buried in earthwork 1, with one end of connecting pipe 9 passing through the top of earthwork 1 and communicating with the atmosphere.

[0034] A non-woven geotextile 6 is laid beneath the geomembrane 3, above the pebble layer 5. The non-woven geotextile 6 protects the geomembrane 3 and filters silt. Both the edges of the geomembrane 3 and the non-woven geotextile 6 are secured by anchoring trenches 7 to prevent slippage within the oxidation pond 2. Plain soil is laid within the anchoring trenches 7, on top of the geomembrane 3. After the surface of the oxidation pond 2 is covered, the edges of the geomembrane 3 and the non-woven geotextile 6 are anchored in the anchoring trenches 7, and then compacted with plain soil to enhance stability.

[0035] The pebble layer 5 is formed by evenly spreading pebbles with a particle size of 20-40mm. The surface of the pebble layer 5 is flat, avoiding damage to the geomembrane 3 and the non-woven geotextile 6. The pebble layer 5 can protect the exhaust pipe 4 and distribute gas evenly. It can protect the exhaust pipe 4 from direct compression and damage by the pond bottom material, and can also make the gas evenly dispersed into the exhaust pipe 4.

[0036] The outer surface of the exhaust pipe 4 is wrapped with geotextile, which weighs 150g / ㎡. The geotextile serves to filter silt and prevent silt from clogging the exhaust pipe 4. Multiple exhaust pipes 4 are provided, parallel to each other and evenly spaced. The distance between adjacent exhaust pipes 4 is 15m. This arrangement effectively collects gases generated at various points on the pond bottom.

[0037] Both the exhaust pipe 4 and the connecting pipe 9 are UPVC pipes (1.0MPa) with a diameter of De110. The exhaust pipe 4 has exhaust holes 8 with a diameter of Φ20mm and an opening angle of 45°, arranged in a staggered pattern. This arrangement allows gas to enter the exhaust pipe 4 more smoothly from various points on the pond bottom, while reducing the possibility of sewage backflow.

[0038] In this embodiment, the geomembrane 3 is an HDPE double-sided geomembrane with a thickness of 1.0 mm, and the non-woven geotextile 6 is a short-fiber needle-punched non-woven geotextile with a fabric weight of 400 g / m².

[0039] The usage process of the exhaust device for the bottom of the oxidation pond provided by this utility model is as follows: During the use of the oxidation pond 2, the decomposition of microorganisms at the bottom of the pond will produce gas (such as biogas). This gas is initially dispersed and buffered by the pebble layer 5 at the bottom of the pond, and then enters the exhaust pipe 4 through the exhaust hole 8 on the exhaust pipe 4.

[0040] Meanwhile, due to the reasonable arrangement and opening design of the exhaust pipe 4, the gas generated at various parts of the pond bottom can be effectively collected and discharged outside the pond through the connecting pipe 9, thereby preventing the gas from accumulating at the bottom of the pond, avoiding damage to the impermeable membrane 3, and ensuring the safe and stable operation of the oxidation pond 2.

[0041] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. The present utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A venting device for the bottom of an oxidation pond, characterized in that, The oxidation pond (2) includes an oxidation pond (2) with a seepage-proof membrane (3) laid on the bottom and walls of the oxidation pond (2). The edge of the seepage-proof membrane (3) is fixed by an anchoring trench (7) set around the edge of the oxidation pond (2). The bottom of the oxidation pond (2) is covered with a pebble layer (5) located below the seepage-proof membrane (3). An exhaust pipe (4) is horizontally buried in the pebble layer (5). Both ends of the exhaust pipe (4) are connected to connecting pipes (9). An exhaust hole (8) is opened on the exhaust pipe (4).

2. The exhaust device for the bottom of an oxidation pond according to claim 1, characterized in that, The impermeable membrane (3) is covered with a non-woven geotextile (6), which is located above the pebble layer (5).

3. The venting device for the bottom of an oxidation pond according to claim 1, characterized in that, The outer surface of the exhaust pipe (4) is wrapped with geotextile, and the weight of the geotextile is 150g / ㎡.

4. The venting device for the bottom of an oxidation pond according to claim 1, characterized in that, The exhaust pipe (4) is provided with multiple pipes, which are parallel to each other and evenly spaced.

5. A venting device for the bottom of an oxidation pond according to claim 4, characterized in that, The distance between adjacent exhaust pipes (4) is 15m.

6. The venting device for the bottom of an oxidation pond according to claim 1, characterized in that, The pebble layer (5) is formed by evenly spreading pebbles with a particle size of 20-40 mm.

7. The venting device for the bottom of an oxidation pond according to claim 1, characterized in that, Both the exhaust pipe (4) and the connecting pipe (9) are UPVC pipes.

8. The venting device for the bottom of an oxidation pond according to claim 1, characterized in that, The exhaust holes (8) on the exhaust pipe (4) are arranged in a plum blossom shape.

9. A venting device for the bottom of an oxidation pond according to claim 2, characterized in that, The geomembrane (3) is an HDPE double-sided geomembrane, and the nonwoven geotextile (6) is a short-fiber needle-punched nonwoven geotextile.

10. A venting device for the bottom of an oxidation pond according to claim 9, characterized in that, The thickness of the HDPE double-sided geomembrane is 1.0 mm, and the weight of the short-fiber needle-punched nonwoven geotextile is 400 g / ㎡.

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