Aeration disc and sewage treatment system

Abstract

The utility model provides an aeration disc and sewage treatment system, wherein the aeration disc comprises a base and a microporous membrane, the edge of the microporous membrane is fixed in the base, and the edge of the base is of a tooth-shaped structure. When the tooth-shaped structure at the edge of the aeration disc is actually used, the mass transfer speed of oxygen is improved by changing the symmetry of the pressure of water flow around a bubble beam, increasing the diffusion range of bubbles in the horizontal direction and increasing the stirring and aeration area, so that the energy consumption of air blowing is reduced, the overall arrangement is simple, and the cost investment is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to an aeration plate and a sewage treatment system. Background Art

[0002] At present, the sewage treatment process is often accompanied by oxygenation, and the most commonly used oxygen supply is the aeration plate. The aeration plates on the market are mostly circular structures. The plane of this structure has no directionality. During the rising process of gas, due to the negative pressure generated by the gas lift effect, the surrounding water will flow toward the bubble bundle, so that the bubble bundle is surrounded and compressed by the surrounding water flow during the entire rising process. The plane diffusion of the bubbles is inhibited, which is not conducive to the diffusion of bubbles and the transfer of oxygen, and reduces the dissolved oxygen efficiency.

[0003] The existing utility model with publication number CN217103264U discloses a cyclonic microporous aerator, which includes a cylinder, a microporous aeration disc, a tube, and blades. The bottom of the cylinder is fixed with a microporous aeration disc, which is connected to a first air inlet pipe. The inner wall of the cylinder is connected to a first bearing via a first connecting rod, which is rotatably connected to the tube. Multiple blades are fixed to the tube, and the upper portion of the cylinder is provided with a first conical flare. This structure drives microbubbles outward in a cyclonic flow through the blades, achieving optimal oxygen transfer at a low energy cost, thereby improving the aeration effect. However, the overall setup is relatively complex, and the multiple blades require regular maintenance, increasing investment costs. Utility Model Content

[0004] The main purpose of the utility model is to provide an aeration plate and a sewage treatment system, aiming to solve the problem that the overall structure of the existing aeration plate is relatively complex and the cost investment is high.

[0005] To achieve the above-mentioned purpose, the utility model provides an aeration plate, which includes a base and a microporous membrane with an edge fixed in the base, and the edge of the base has a tooth-like structure.

[0006] Optionally, the base includes a support member and a hollow pressing member, and the microporous membrane is fixed between the support member and the pressing member.

[0007] Optionally, a through hole is centrally arranged on the support member, and the through hole is connected to a corresponding air inlet interface, and the air inlet interface is used to be connected to an external air source.

[0008] Optionally, the toothed structure of the base edge has at least one set of tooth tips and tooth grooves.

[0009] Optionally, the radial difference between each tooth tip and tooth groove is greater than 5 mm and less than 200 mm.

[0010] Optionally, the outer edge of the supporting member and / or the pressing member has a tooth-like structure.

[0011] Optionally, the surface of the microporous membrane has a plurality of air holes, and the plurality of air holes are arranged in a non-centrosymmetrical manner.

[0012] Optionally, the microporous membrane is elastic.

[0013] Optionally, the support member and the pressing member are connected by one of threaded connection, bolted connection, adhesive connection and welding connection.

[0014] In addition, to achieve the above objectives, the present invention also provides a sewage treatment system, which includes the aeration plate described in any one of the above items.

[0015] Beneficial effects:

[0016] The aeration disk of the utility model includes a base and a microporous membrane with an edge fixed in the base. The edge of the base has a serrated structure. Therefore, when in actual use, the serrated structure of the edge of the aeration disk changes the symmetry of the water flow pressure around the bubble bundle, increases the diffusion range of the bubbles in the horizontal direction, increases the stirring and aeration area, and improves the oxygen mass transfer rate to reduce the energy consumption of the blast. The overall setting is simple, and the cost investment is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 is an elevational view of an embodiment of an aeration plate;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of different bases shown;

[0020] Figure 3 for Figure 1 An elevational view of the support member shown being threadedly connected to the compression member;

[0021] Figure 4 for Figure 1 An elevational view showing a bolted connection between the support member and the compression member;

[0022] Figure 5 for Figure 1 An elevational view of a partially bolted connection between the support member and the compression member is shown;

[0023] Figure 6 for Figure 1Plan view of the aerator disc with bolted connections shown;

[0024] Figure 7 for Figure 1 A plan view of an embodiment of a microporous membrane with spiral openings shown;

[0025] Figure 8 for Figure 1 Schematic diagram of bubble diffusion of the aeration plate shown;

[0026] Figure 9 for Figure 1 A plan view of another embodiment of a microporous membrane with spiral openings is shown.

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0028] Description of Figure Numbers:

[0029] Label name Label name 1 Microporous membrane 2 base 3 Air intake port 101 ventilation holes 201 Support 202 Pressing parts 203 Fixing bolt DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0034] The utility model also provides a sewage treatment system, which includes an aeration plate, and the purpose of air stirring or oxygenating aeration is performed through the aeration plate, wherein, Figures 1 to 9 As shown, the aeration disk includes a base 2 and a microporous membrane 1 whose edge is fixed in the base 2. The edge of the base 2 is a serrated structure, and the serrated structure of the edge of the aeration disk is used to change the symmetry of the water flow pressure around the bubble beam, increase the horizontal diffusion range of the bubbles, increase the stirring and aeration area, and improve the oxygen mass transfer rate to reduce the energy consumption of the blast. The overall setting is simple, and the cost investment is effectively reduced.

[0035] Furthermore, the base 2 includes a support member 201 and a hollow pressing member 202 , and the microporous membrane 1 is fixed between the support member 201 and the pressing member 202 .

[0036] Specifically, the support member 201 and the pressing member 202 are connected by one of the following methods: threaded connection, bolted connection, adhesive connection and welding connection, for example Figure 3 This is the elevation view of the threaded connection between the support and the pressing piece. Figure 4 The figure shows the elevation view of the bolted connection between the support and the pressing member, and when the bolted connection is adopted, such as Figure 5 As shown, the support member 201 and the hollow pressing member 202 are fixed by a fixing bolt 203, and the fixing bolt can be selected by bolts, elastic bolts, etc. Figure 6 Shown is an elevation view of a portion of the bolt, including the left side Figure 6 a shows a flat elastic bolt with a Figure 6 b is a round elastic bolt, on the right Figure 6 c is a bolt connection, so the connection arrangement of the support member 201 and the pressing member 202 can effectively fix the microporous membrane 1 to avoid air leakage.

[0037] Furthermore, the tooth structure on the edge of the base 2 has at least one set of tooth tips and tooth grooves. Specifically, the tooth tips can be in an acute angle, a right angle, an obtuse angle, an arc shape, or a combination thereof. Figure 2 The diagram shows a schematic diagram of the structure of a portion of the base 2, wherein: Figure 2 aThe tooth tip is an acute angle. Figure 2 b The tooth tip is a right angle, Figure 2 c The tooth tip is obtuse, and Figure 2 The tip of the tooth d is an arc-shaped edge. Preferably, the base 2 is made of organic polymer materials such as ABS and PVC, which have the advantages of being light, corrosion-resistant and cheap. More preferably, the number of teeth is preferably 1-36.

[0038] Furthermore, a through hole is centrally arranged on the support member 201 , and the through hole is connected to a corresponding air inlet interface 3 , and the air inlet interface 3 is used to be connected to an external air source.

[0039] Furthermore, the surface of the microporous membrane 1 has a plurality of air holes 101, thereby forming a corresponding aeration area on the surface of the microporous membrane 1. The aeration area can be a whole piece or composed of a plurality of aeration units, and the smallest aeration unit itself is asymmetric. Specifically, the air holes 101 on the surface of the microporous membrane 1 are arranged non-centrosymmetrically. The bubbles generated by the non-centrosymmetrical air holes 101 are subjected to asymmetric annular pressure from water during the rising process, which can reduce the degree of bubble aggregation during the rising process and increase the dispersion effect of the bubbles, such as Figure 7 The bubbles generated by the spiral opening shown in the figure will produce horizontal rotation and centrifugal effect of water flow during the rising process. Under the action of centrifugal force, the bubbles have a horizontal diffusion component speed, and the diffusion area is larger. The specific bubble diffusion diagram is as follows Figure 8 shown.

[0040] Furthermore, if Figure 9 The microporous membrane 1 shown is divided into four aeration units, and a single aeration unit itself is asymmetrically arranged. Therefore, the annular pressure of water on the bubbles generated by the air holes 101 in a single aeration unit during the rising process is also asymmetrical, which can reduce the degree of aggregation of bubbles during the rising process and increase the dispersion effect of the bubbles, thereby facilitating the transfer of oxygen and improving the dissolved oxygen efficiency.

[0041] Furthermore, the microporous membrane 1 is elastic, for example, made of elastic materials such as silicone and rubber. During actual aeration, the air holes 101 are opened to allow bubbles to pass through, and when aeration is stopped, the air holes 101 are closed.

[0042] Furthermore, the radial difference between each tooth tip and tooth groove is greater than 5 mm and less than 200 mm, and the radial difference between adjacent tooth tips and tooth grooves can be the same or different, as long as the resulting edge of the base 2 is not symmetrical. Furthermore, the support members 201 and / or the pressure member 202 in the base 2 have a tooth-like structure. The tooth-like structure of the support members 201 and / or the pressure member 202 effectively disrupts the symmetry of the edge of the base 2, thereby changing the symmetry of the water flow pressure around the bubble bundle, increasing the horizontal diffusion range of the bubbles, expanding the stirring and aeration area, improving the oxygen mass transfer rate, and reducing the energy consumption of the blast. More preferably, the outer edges of the support members 201 and the pressure member 202 are aligned and both have a tooth-like structure.

[0043] Furthermore, the shape of the microporous membrane 1 can be circular or in a shape that is consistent with the shape of the base 2. When the microporous membrane 1 is circular, a threaded connection can be used; when the membrane and the edge are both star-shaped, the connection between the support 201 and the pressing member 202 can only be bolted or bonded. Since bonding is a disposable product, bolting is more convenient for repair and maintenance. There are three common bolts for bolting, such as Figure 6 As shown, Figure 6 The bolt connection of c is easy to come loose during operation. Figure 6 The elastic deformation space of the circular elastic bolt b is small, the clamping area is limited, and it is preferably Figure 6 a flat elastic plug, which can fully stretch along the edge direction, does not waste the area of ​​the ineffective aeration zone and saves materials.

[0044] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or system comprising the element. The serial numbers of the above-mentioned embodiments of the present invention are for description only and do not represent the advantages and disadvantages of the embodiments.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An aeration plate, characterized in that: The aeration plate comprises a base (2) and a microporous membrane (1) whose edge is fixed in the base (2); the edge of the base (2) has a tooth-like structure; the surface of the microporous membrane (1) has a plurality of air holes (101); and the plurality of air holes (101) are arranged in a non-centrally symmetrical manner.

2. The aeration plate according to claim 1, characterized in that: The base (2) comprises a support member (201) and a hollow pressing member (202), and the microporous membrane (1) is fixed between the support member (201) and the pressing member (202).

3. The aeration plate according to claim 2, characterized in that: The support member (201) is centrally provided with a through hole, the through hole being connected to a corresponding air inlet interface (3), and the air inlet interface (3) is used to be connected to an external air source.

4. The aeration plate according to claim 1, characterized in that: The toothed structure on the edge of the base (2) has at least one set of tooth tips and tooth grooves.

5. The aeration plate according to claim 4, characterized in that: The radial difference between each tooth tip and tooth groove is greater than 5mm and less than 200mm.

6. The aeration plate according to claim 2, characterized in that: The outer edges of the supporting member (201) and / or the pressing member (202) are in a tooth-like structure.

7. The aeration plate according to claim 1, characterized in that: The microporous membrane (1) has elasticity.

8. The aeration plate according to claim 2, characterized in that: The support member (201) and the pressing member (202) are connected by one of threaded connection, bolted connection, adhesive connection and welding connection.

9. A sewage treatment system, characterized in that: The sewage treatment system comprises the aeration plate according to any one of claims 1 to 8.

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