Aeration device for water body bottom mud

Abstract

The utility model relates to the technical field of water environment treatment, and discloses an aeration device for water body bottom mud, which comprises a dissolved oxygen detector, an automatic control system, a central rod, an inner ring body and an outer ring body, the bottom end of the center rod is inserted into the deep part of bottom mud, and the inner ring body sleeves the center rod in a sliding manner; the outer ring body is connected with the inner ring body through the connecting rods, and the outer ring body and the inner ring body are located at the same horizontal height. The inner part of the outer ring body is hollow and is connected with an air delivery pipe; the air delivery pipe is connected with an external air feeder; a plurality of aeration pipes are further connected to the outer ring body, the aeration pipes are communicated with the interior of the outer ring body, and aeration holes are densely distributed in the aeration pipes; a probe of the dissolved oxygen detector is inserted into a mud layer near the aeration pipe; and the dissolved oxygen detector and the air feeder are respectively in communication connection with the automatic control system. The aeration device disclosed by the utility model can be used for aerating bottom mud in a relatively large range and increasing the oxygen content in the bottom mud.

Description

Technical Field

[0001] The utility model relates to the technical field of water environment treatment, in particular to an aeration device for water body bottom mud. Background Art

[0002] Bottom sediment remediation and treatment is an indispensable and important part of water environment management. When the bottom of the water body is lacking in oxygen, the organic matter in the bottom sediment will undergo anaerobic fermentation and decomposition, producing methane and gases with foul odors such as hydrogen sulfide and ammonia. At the same time, hydrogen sulfide is also easy to combine with the iron ions contained in the water body to produce iron sulfide, causing the water body to turn black and bring a bad impression. When the oxygen content at the bottom of the water body is sufficient, the metabolic activity of anaerobic microorganisms is inhibited, and the metabolic activity of aerobic microorganisms is enhanced. The bottom sediment decomposition process is mainly based on aerobic fermentation. The fermentation products are water, carbon dioxide and chemically stable humus, which has no adverse effects on the water body. Therefore, increasing the oxygen content in the sediment and overlying water can strengthen the metabolic activity of aerobic microorganisms, inhibit the decomposition of organic matter by underwater anaerobic bacteria, and reduce the production of methane, hydrogen sulfide, ammonia and other substances; at the same time, increasing the oxygen content in the sediment and overlying water can also change the valence state of the iron ions contained in the sediment, causing it to react with phosphate to form water-insoluble iron phosphate precipitates, effectively reducing the phosphorus concentration in the water body. Therefore, in situ remediation of sediment can be achieved by increasing the oxygen content in the sediment and overlying water.

[0003] Most of the existing sediment aeration devices are continuous aeration devices that are manually switched on and off. They are unable to monitor the oxygen content in the sediment in real time and automatically and adaptively adjust the aeration duration and frequency according to the monitoring results, that is, they are unable to achieve automated aeration. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an aeration device for bottom mud of water body.

[0005] An aeration device for bottom mud of water body, comprising: a dissolved oxygen detector, an automatic control system, a central rod, an inner ring body and an outer ring body; the bottom end of the central rod is inserted into the deep part of the bottom mud, and the inner ring body is slidably sleeved on the central rod;

[0006] The outer ring body is connected to the inner ring body through a connecting rod, and the outer ring body and the inner ring body are at the same level; the inner part of the outer ring body is hollow and connected to an air supply pipe, and the air supply pipe is connected to an external blower; the outer ring body is also connected to a plurality of aeration pipes, the aeration pipes are connected to the inner part of the outer ring body, and the aeration pipes are densely covered with aeration holes;

[0007] The probe of the dissolved oxygen detector is inserted into the mud layer near the aeration pipe, and the dissolved oxygen detector and the air blower are respectively connected to the automatic control system for communication.

[0008] Furthermore, a groove slideway is provided on the center rod along the axial direction, and a convex sliding block is provided on the inner side of the inner ring body. The convex sliding block is stuck in the groove slideway and slides along the groove slideway.

[0009] Furthermore, the center rod is provided with limit blocks, which are located at both ends of the groove slideway.

[0010] Furthermore, the aeration pipes are horizontally connected to the outer side of the outer ring body and are distributed in a radially divergent shape.

[0011] Furthermore, a counterweight is connected to the lower portion of the outer ring body.

[0012] Furthermore, the aeration pipe is evenly and densely distributed with aeration holes of nanometer pore size.

[0013] Furthermore, the outer wall of the center rod is provided with two or more inner ring bodies and outer ring bodies.

[0014] The utility model has the following beneficial effects:

[0015] (1) The aeration device of the utility model is provided with an inner ring body that can slide up and down on the central rod, and the outer ring body is horizontally connected to the inner ring body. The outer ring body is connected to an aeration pipe, which can aerate a larger range of bottom mud and increase the oxygen content in the bottom mud.

[0016] (2) The aeration device of the utility model can automatically add oxygen to the bottom mud in conjunction with a dissolved oxygen detector and an automatic control system without manual operation. In addition, the overall manufacturing cost of the device is low, installation and use are convenient, and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the aeration device in Embodiment 1 of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the aeration device in the second embodiment of the present utility model;

[0019] Figure 3 It is a structural schematic diagram of the groove slideway in the utility model;

[0020] Figure 4 This is a schematic diagram of the structure in which the outer ring body is connected to the aeration pipe in the utility model;

[0021] Figure 5 It is a schematic diagram of the overall structure of the device of the utility model.

[0022] In the figure: 1-center rod; 10-limiting block; 11-groove slideway; 12-convex slider; 20-inner ring body; 21-outer ring body; 22-connecting rod; 3-aeration pipe; 4-gas transmission pipe. DETAILED DESCRIPTION

[0023] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0024] Embodiment 1

[0025] refer to Figure 1 , Figures 3 to 5 The utility model provides an aeration device for bottom mud of water bodies, comprising: a dissolved oxygen detector, an automatic control system, a blower, a center rod 1, an inner ring body 20 and an outer ring body 21, wherein the dissolved oxygen detector and the blower are respectively connected to the automatic control system for communication.

[0026] The center rod 1 is a cylindrical or prismatic structure, and its bottom end is fixed in the deep mud layer at the bottom of the water body to fix the entire device; the center rod 1 is provided with an axial groove slideway 11, and a convex slider 12 is provided on the inner side of the inner ring body 20. The shape of the convex slider 12 is adapted to the groove slideway 11. The convex slider 12 is stuck in the groove slideway 11 and slides along the groove slideway 11, thereby driving the inner ring body 20 to slide along the center rod 1. The shape of the inner ring body 20 is adapted to the shape of the center rod 1, so that the inner ring body 20 can slide outside the center rod 1. If the center rod 1 is cylindrical, the inner ring body 20 is also annular. Limit blocks 10 are also provided at both ends of the groove slideway 11, and the limit blocks 10 are used to limit the sliding of the inner ring body 20.

[0027] The outer ring body 21 is connected to the inner ring body 20 through a connecting rod 22, and the outer ring body 21 and the inner ring body 20 are at the same level. The outer ring body 21 is a circular ring structure with a larger diameter, and its interior is hollow.

[0028] If the outer ring body 21 is made of a lightweight plastic tube, a counterweight block needs to be connected to the lower part of the outer ring body 21 to increase gravity and prevent floating when buried in shallow bottom mud. The counterweight block can be made of stones and tied to the lower part of the outer ring body 21 through a net bag.

[0029] In this embodiment, the inner ring body 20, the outer ring body 21 and the connecting rod 22 are all made of stainless steel pipes.

[0030] The outer ring body 21 is connected with an air delivery pipe 4 and an aeration pipe 3. The aeration pipe 3 is uniformly and densely covered with aeration holes with nanometer-level apertures, which can generally be 50 to 200 nanometers. The air input by the air delivery pipe 4 first enters the hollow interior of the outer ring body 21, and then enters the aeration pipe 3 connected thereto; the air delivery pipe 4 is connected to an external blower, which is set in an open area to ensure that the compressed air has a high oxygen content. The blower can be an air compressor of a suitable model, and the air delivery pipe 4 is connected to the air outlet of the air compressor.

[0031] Preferably, the aeration pipes 3 are horizontally connected to the outside of the outer ring body 21 and are distributed radially divergently to maximize the aeration range.

[0032] The probe of the dissolved oxygen detector is inserted into the mud layer near the aeration pipe 3 to detect the dissolved oxygen content in the local area of ​​the bottom mud and transmit the detection data to the automatic control system in real time. The automatic control system makes instructions after judgment to determine the start and stop of the blower. The dissolved oxygen detector uses the JPB-880A microgram level meter.

[0033] The automatic control system uses S7-200 programmable PLC to receive the measurement data of the dissolved oxygen detector, and compares the measurement data with the preset standard to determine whether the dissolved oxygen in the mud meets the standard. When the dissolved oxygen content is lower than the preset standard, the automatic control system instructs the blower to start working. The blower allows fresh oxygen-rich air to fully contact the bottom mud through the aeration pipe, thereby increasing the dissolved oxygen. When the dissolved oxygen in the bottom mud meets the standard, the blower stops working, forming an environment that is conducive to the survival of aquatic plants and aquatic animals, allowing the polluted water body to be restored.

[0034] The automatic control system, the blower and the dissolved oxygen detector in this embodiment are powered by batteries, and can also be electrically connected to the nearest power grid through wires.

[0035] Embodiment 2

[0036] refer to Figure 2 When the mud layer to be aerated is thick, in order to increase the effectiveness of aeration, two or more inner ring bodies 20 and outer ring bodies 21 are provided on the outer wall of the central rod 1, and aeration pipes 3 are respectively connected to the upper and lower outer ring bodies 21, thereby achieving the range of aeration.

[0037] Two upper and lower adjacent outer ring bodies 21 can be connected and positioned by using vertical struts, or they can be buried at any depth without being connected.

[0038] The other configurations of this embodiment are the same as those of the first embodiment.

[0039] The above is only a preferred embodiment of the utility model, which does not represent all possible forms of the utility model, and the protection scope of the utility model is not limited to such special statements and embodiments. According to the technical inspirations disclosed by the utility model, various other modifications and improvements that do not deviate from the essence of the utility model are made, and these modifications and improvements are still within the protection scope of the utility model.

Claims

1. An aeration device for water body sediment, characterized in that: include: A dissolved oxygen detector, an automatic control system, a central rod (1), an inner ring body (20) and an outer ring body (21); the bottom end of the central rod (1) is inserted into the deep part of the bottom mud, and the inner ring body (20) is slidably sleeved on the central rod (1); The outer ring body (21) is connected to the inner ring body (20) via a connecting rod (22), and the outer ring body (21) and the inner ring body (20) are at the same level; the interior of the outer ring body (21) is hollow and is connected to an air supply pipe (4), and the air supply pipe (4) is connected to an external blower; the outer ring body (21) is also connected to a plurality of aeration pipes (3), the aeration pipes (3) are connected to the interior of the outer ring body (21), and the aeration pipes (3) are densely covered with aeration holes; The probe of the dissolved oxygen detector is inserted into the mud layer near the aeration pipe (3), and the dissolved oxygen detector and the air blower are respectively connected to the automatic control system for communication.

2. The aeration device for water sediment according to claim 1, characterized in that: The center rod (1) is provided with an axially extending groove slideway (11), and the inner side of the inner ring body (20) is provided with a convex sliding block (12), and the convex sliding block (12) is stuck in the groove slideway (11) and slides along the groove slideway (11).

3. The aeration device for water body sediment according to claim 2, characterized in that: The center rod (1) is provided with a limit block (10), and the limit block (10) is located at both ends of the groove slideway (11).

4. The aeration device for water body sediment according to claim 1, characterized in that: The aeration pipes (3) are horizontally connected to the outside of the outer ring body (21) and are distributed in a radially divergent manner.

5. The aeration device for water sediment according to claim 1, characterized in that: The lower part of the outer ring body (21) is connected with a counterweight block.

6. The aeration device for water sediment according to claim 1, characterized in that: The aeration pipe (3) is evenly and densely distributed with aeration holes with nanometer-scale pore sizes.

7. The aeration device for water sediment according to any one of claims 1 to 6, characterized in that: The outer wall of the central rod (1) is provided with two or more inner ring bodies (20) and outer ring bodies (21).

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