An air distribution structure and device for improving the aeration and reoxygenation efficiency of rivers.

Abstract

This invention discloses an aeration structure and device for improving the aeration and reoxygenation efficiency of rivers, relating to the field of water environment purification and treatment technology. The aeration structure includes several groups of aeration pipes arranged in a matrix at intervals; an installation frame is fixedly arranged on the aeration pipes, and at least one layer of movable distributors is arranged in the installation frame, the movable distributors including several groups of movable distribution discs arranged at intervals; wherein, at least one layer of fixed distributors is also arranged in the installation frame, the fixed distributors including several groups of fixed distribution discs arranged at intervals. The fixed distributors of this invention are arranged in one or more layers in the installation frame, without limitation, and can be set based on the river water depth; by arranging fixed and movable distribution discs on the aeration pipes, turbulence is created, allowing the aeration bubbles to have a longer contact time with the water body, thereby improving the aeration and reoxygenation efficiency and reducing energy consumption.

Description

Technical Field

[0001] This invention relates to the field of water environment purification and treatment technology, specifically to an aeration structure and aeration device for improving the aeration and reoxygenation efficiency of rivers. Background Technology

[0002] River reoxygenation aeration is a common method for river water ecological restoration. Aeration can increase dissolved oxygen in the water, which helps to improve the biological activity and biomass of the river, purify pollutants in the river water, and improve the water quality of polluted water bodies.

[0003] In engineering applications, common aeration and reoxygenation methods include fountain aeration, submersible propulsion aeration, micro-nano aeration, and micropore aeration. Among them, micro-nano aeration and micropore aeration are the two most commonly used. Although nano-level aeration has a higher aeration efficiency than general micropore aeration, its higher energy consumption and equipment investment make it less cost-effective than general micropore aeration.

[0004] In the prior art, such as the patent document with announcement number CN211198779U, an aeration and reoxygenation device for river restoration is disclosed. This device includes a float, with an electrical box connected to one side of its top. A first groove is provided at the middle of both the front and rear sides of the float, and a limit rod is connected to the front and rear sides of the float near the first groove. An air supply hose is connected to the bottom of the float, and an aeration pipe is connected to the end of the air supply hose furthest from the float. However, in practical applications, the disadvantage of microporous aeration in the prior art is that the aeration bubbles are relatively large and rise quickly, resulting in a short residence time in the water. Therefore, by reasonably designing and extending the contact time between the bubbles and the water, the aeration and reoxygenation efficiency can be improved and energy consumption reduced. Summary of the Invention

[0005] The purpose of this invention is to provide an air distribution structure and device for improving the aeration and reoxygenation efficiency of rivers, and to solve the following technical problems:

[0006] The disadvantage of existing microporous aeration technology is that the aeration bubbles are relatively large and rise quickly, resulting in a short residence time in the water. Therefore, by reasonably designing to extend the contact time between the bubbles and the water, the aeration and reoxygenation efficiency can be improved and energy consumption reduced.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] An air distribution structure for improving the aeration and reoxygenation efficiency of river channels includes several groups of aeration pipes arranged in a matrix at intervals.

[0009] An installation frame is fixedly arranged on the aeration pipe, and at least one layer of movable distributors is arranged in the installation frame. The movable distributors include several groups of movable distribution discs arranged at intervals.

[0010] The installation frame is also equipped with at least one layer of fixed distributors, which includes several groups of fixed distribution discs arranged at intervals.

[0011] Preferably, the fixed distribution plate includes two sets of symmetrically arranged fixed wing plates, and the included angle between the two fixed wing plates is α, with the value of α being 155-175°.

[0012] Preferably, the movable distribution disk includes two sets of symmetrically arranged movable wing plates, with the included angle of the two movable wing plates being β, and the value of β being 130-170°.

[0013] Preferably, the movable wing plates on both sides are rotatably mounted in the mounting frame via a rotating shaft.

[0014] Preferably, for the movable distribution plate, the movable wing plates on both sides are respectively configured as inflow wing plates and outflow wing plates.

[0015] Preferably, the length of the inflow direction vane is less than the length of the outflow direction vane.

[0016] Preferably, the dewatering directional wing plate is provided with several sets of small holes, the hole diameter is 10-50 times the initial bubble diameter of aeration, and the hole diameter is less than or equal to 5mm.

[0017] Preferably, the weight of the outflow wing plate is equal to that of the inflow wing plate.

[0018] Preferably, for the fixed distribution disc, the length of the fixed wing plate on one side is 2-5 times the diameter of the aeration pipe;

[0019] For the movable distribution disc, the length of its single-sided movable wing plate is 3-6 times the diameter of the aeration pipe.

[0020] An aeration and reoxygenation device for improving the efficiency of river aeration includes the aforementioned aeration structure, wherein each group of the aeration structure is arranged in a matrix at multiple points in the river.

[0021] The beneficial effects of this invention are:

[0022] (1) The fixed distributor of the present invention has one or more layers arranged in the installation frame, which is not limited and can be set according to the river water depth; by arranging fixed distribution discs and movable distribution discs on the aeration pipe, the flow is disturbed, so that the contact time between the aeration bubbles and the water body in the water is longer, which can improve the aeration and reoxygenation efficiency and reduce energy consumption.

[0023] (2) When the present invention is used, the direction of the movable wing plate is perpendicular to the direction of the river flow. By reasonably arranging the device in the direction of the river flow and adding aeration bubbles and water flow disturbance in the device, the overall reoxygenation efficiency of the aeration system is improved. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of an air distribution structure for improving the aeration and reoxygenation efficiency of river channels according to the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of an air distribution structure for improving the aeration and reoxygenation efficiency of river channels according to the present invention. Figure 2 ;

[0027] Figure 3 This is a schematic diagram of an air distribution structure for improving the aeration and reoxygenation efficiency of river channels according to the present invention. Figure 3 .

[0028] In the diagram: 1. Aeration pipe; 2. Fixed distribution disc; 3. Movable distribution disc; 4. Rotating shaft; 3-1. Outflow wing plate; 3-2. Inflow wing plate. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] Please see Figures 1-2 As shown, this invention relates to an air distribution structure for improving the aeration and reoxygenation efficiency of river channels, comprising several groups of aeration pipes 1 arranged in a matrix at intervals; in one embodiment, three groups of aeration pipes 1 are arranged; each group of aeration pipes 1 is connected to a small blower aerator via a main pipe, with an aeration volume of 0.6 m³ / s. 3 / min; the diameter of aeration pipe 1 is 14mm; the initial average diameter of aeration bubbles is 300μm;

[0032] An installation frame is fixedly arranged on the aeration pipe 1. At least one layer of movable distributor is arranged in the installation frame. The movable distributor includes several sets of movable distribution discs 3 arranged at intervals. In one embodiment of this example, two sets of movable distribution discs 3 are arranged at intervals in the installation frame.

[0033] The mounting frame is also equipped with at least one layer of fixed distributors, which includes several sets of fixed distribution discs 2 arranged at intervals; in this embodiment, three sets of fixed distribution discs 2 are arranged at intervals in the mounting frame.

[0034] As another implementation, two layers of fixed distributors are arranged opposite each other on both sides of the movable distributor; it can be noted that the fixed distributors are arranged in one or more layers in the mounting frame, which is not limited and can be set based on the river water depth; in this embodiment, by arranging fixed distribution discs 3 and movable distribution discs 3 on the aeration pipe 1, the flow is disturbed, so that the contact time between the aeration bubbles and the water body is longer, which can improve the aeration and reoxygenation efficiency and reduce energy consumption.

[0035] Example 2

[0036] Based on Example 1, please refer to Figure 3 The fixed distribution plate 2 includes two sets of symmetrically arranged fixed wing plates, and the included angle between the two fixed wing plates is α, with the value of α being 155-175°.

[0037] Specifically, in this embodiment, when the water flow velocity is less than or equal to 0.5 m / s, the value of α is 160-175°, and when the water flow velocity is greater than 0.5 m / s, the value of α is 155-160°.

[0038] The movable distribution plate 3 includes two sets of symmetrically arranged movable wing plates, with the included angle of the two movable wing plates being β, and the value of β being 130-170°.

[0039] The movable wing plates on both sides are rotatably mounted in the installation frame via the rotating shaft 4. It should be noted that the movable wing plates on both sides can rotate around the rotating shaft 4 when impacted by water flow.

[0040] Specifically, in this embodiment, when the water flow velocity is less than or equal to 0.5 m / s, the value of α is 150-170°, and when the water flow velocity is greater than 0.5 m / s, the value of α is 130-150°.

[0041] For the movable distribution plate 3, based on the water flow direction, its two movable wing plates are respectively set as the inflow direction wing plate 3-2 and the outflow direction wing plate 3-1;

[0042] Specifically, in this embodiment, the length of the inlet direction vane 3-2 is less than the length of the outlet direction vane 3-1;

[0043] Several sets of small holes are evenly opened on the water-discharging wing plate 3-1. The hole diameter is 10-50 times the initial bubble diameter of aeration, the hole diameter is less than or equal to 5mm, and the hole density on the water-discharging wing plate is less than or equal to 5PPI.

[0044] The weight of the outflow wing plate 3-1 is equal to that of the inflow wing plate 3-2. It can be noted that in this embodiment, the length of the inflow wing plate 3-2 is less than that of the outflow wing plate 3-1. By opening small holes in the outflow wing plate 3-1, the weight of the two wing plates is kept equal.

[0045] As a further embodiment, for the fixed distribution plate 2, the length of its single-sided fixed wing plate is 2-5 times the diameter of the aeration pipe;

[0046] For the movable distribution disc 3, the length of its single-sided movable wing plate is 3-6 times the diameter of the aeration pipe;

[0047] Furthermore, the horizontal distance between two sets of adjacent fixed distribution discs 2 is 0.85-0.95 times the horizontal distance between two sets of movable distribution discs 3;

[0048] The vertical height of the fixed distribution plate 3 is 0.65-0.95 times that of the movable distribution plate 3.

[0049] The movable distribution tray 3 is made of resin material with a density of 1.0-1.1 g / cm³. 3 .

[0050] Example 2

[0051] An aeration and reoxygenation device for improving the efficiency of river aeration includes the aeration structure in Example 1, wherein each group of aeration structures is arranged in a matrix at multiple points in the river.

[0052] Example 3

[0053] The water flow velocity is 0.4 m / s, the initial oxygen content is 4.3 mg / L, and the total volume of the device is 6 m³. 3 The aeration pipe connects to a small blower aerator, with an aeration capacity of 0.6m³. 3 / min.

[0054] The diameter of aeration pipe 1 is 14mm, the initial average diameter of aeration bubbles is 300μm, the included angle α of the fixed wing on both sides of the fixed distribution plate is 160°, and the included angle β of the movable wing on both sides of the movable distribution plate is 160°.

[0055] The fixed distribution plate 2 has left and right fixed wing plates, each 7cm in length; the movable distribution plate 3 has a drain wing plate 3-1 with a length of 8cm and an inlet wing plate 3-2 with a length of 7.6cm on one side. The drain wing plate 3-1 has small holes with a diameter of 3mm and a perforation density of 3PPI. The movable distribution plate 3 is made of resin with a density of 1.05g / cm³. 3 ;

[0056] The horizontal spacing of the fixed distribution discs 2 is 27.4cm, the horizontal spacing of the movable distribution discs 3 is 28.5cm, the vertical height of the movable distribution discs 3 is 13.7cm, and the vertical height of the fixed distribution discs 2 is 10.2cm.

[0057] The mounting frame is fixed with stainless steel brackets;

[0058] Under the above experimental parameter settings, after 5 minutes of continuous aeration, the oxygen content of the water body increased to 7.2 mg / L, compared with 6.7 mg / L in the blank experimental group.

[0059] Example 4

[0060] The water flow velocity is 0.24 m / s, the initial oxygen content is 4.3 mg / L, and the total volume of the device is 6 m³. 3 The aeration pipe connects to a small blower aerator, with an aeration capacity of 2m³. 3 / min.

[0061] The diameter of aeration pipe 1 is 14mm, the initial average diameter of aeration bubbles is 300μm, the included angle α of the fixed wing on both sides of the fixed distribution plate is 160°, and the included angle β of the movable wing on both sides of the movable distribution plate is 160°.

[0062] The fixed distribution plate 2 has left and right fixed wing plates, each 7cm in length; the movable distribution plate 3 has a water outlet wing plate 3-1 with a length of 8cm and a water inlet wing plate 3-2 with a length of 7.6cm. The water outlet wing plate 3-1 has small holes with a diameter of 3mm and a perforation density of 3PPI. The movable distribution plate 3 is made of resin with a density of 1.1g / cm³. 3 ;

[0063] The horizontal spacing of the fixed distribution discs 2 is 27.4cm, the horizontal spacing of the movable distribution discs 3 is 28.5cm, the vertical height of the movable distribution discs 3 is 13.7cm, and the vertical height of the fixed distribution discs 2 is 10.2cm.

[0064] The fixed distribution plate 2 and the movable distribution plate 3 are arranged in a total of six layers, including two layers of movable distribution plates 3 and four layers of fixed distribution plates 2; 10 sets are arranged in a single layer of movable distribution plate 3.

[0065] The mounting frame is fixed with stainless steel brackets;

[0066] Under the experimental parameters set above, after 1 hour of continuous aeration, the oxygen content of the water was measured in two sets of aeration structures in the upstream and downstream sections of the river. The oxygen content was 3.6 mg / L and 7.4 mg / L, respectively. Compared with historical data, the oxygenation efficiency before adding the aeration structure was 0.22 kWh / kgO2; after adding the aeration structure, the calculated oxygenation efficiency was 0.20 kWh / kgO2, which increased the oxygenation efficiency by 9%.

[0067] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0068] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0069] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An air distribution structure for improving the aeration and reoxygenation efficiency of a river, comprising several groups of aeration pipes arranged in a matrix at intervals (1). Its features are, An installation frame is fixedly arranged on the aeration pipe (1), and at least one layer of movable distributors is arranged in the installation frame. The movable distributors include several groups of movable distribution discs (3) arranged at intervals. The installation frame is also provided with at least one layer of fixed distributors, which includes several groups of fixed distribution discs (2) arranged at intervals. The movable distribution plate (3) includes two sets of symmetrically arranged movable wing plates, with the included angle of the two movable wing plates being β, and the value of β being 130-170°. The movable wing plates on both sides are rotatably mounted in the installation frame via a rotating shaft (4); For the movable distribution plate (3), the movable wing plates on both sides are respectively set as the inflow direction wing plate (3-2) and the outflow direction wing plate (3-1); The length of the inlet direction vane (3-2) is less than the length of the outlet direction vane (3-1); The dewatering directional wing plate (3-1) is provided with several sets of small holes evenly distributed on it. The hole diameter is 10-50 times the initial bubble diameter of the aeration, and the hole diameter is less than or equal to 5mm.

2. The air distribution structure for improving the aeration and reoxygenation efficiency of river channels according to claim 1, characterized in that, The fixed distribution plate (2) includes two sets of symmetrically arranged fixed wing plates, with the included angle between the two fixed wing plates being α, and the value of α being 155-175°.

3. The air distribution structure for improving the aeration and reoxygenation efficiency of river channels according to claim 1, characterized in that, The weight of the outgoing water direction vane (3-1) is equal to that of the incoming water direction vane (3-2).

4. The air distribution structure for improving the aeration and reoxygenation efficiency of river channels according to claim 1, characterized in that, For the fixed distribution disc (2), the length of its single-sided fixed wing plate is 2-5 times the diameter of the aeration pipe; For the movable distribution disc (3), the length of its single-sided movable wing plate is 3-6 times the diameter of the aeration pipe.

5. An aeration distribution device for improving the efficiency of river aeration and reoxygenation, characterized in that, Includes the gas distribution structure as described in any one of claims 1-4, wherein each group of gas distribution structures is arranged in a matrix at multiple points in the river channel.

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