KR101267797B1 - Membrane diffuser - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an acid engine for use in a reaction tank, a lake, a river, a fish farm, etc. of a sewage treatment plant, and for dispersing air supplied from a blower into fine bubbles in water to increase dissolved oxygen.
The present invention provides a flexible membrane having a plurality of air diffusers capable of generating fine bubbles in water, a first body having an air supply port for supplying air from a blower to the membrane, and an air blower outlet. It consists of a fixed frame for fixing the second body and the membrane, the upper surface of the membrane is composed of a protective mesh, formed by molding the first body, the second body and the fixing frame made of synthetic resin and solidly fusion-bonded integrally By providing a membrane diffuser, it is excellent in the airtightness of the bonding site, it is possible to prevent the membrane over-expansion and rupture to maintain a high oxygen transfer rate.

Description

Membrane diffuser {MEMBRANE DIFFUSER}

The present invention relates to a device for supplying oxygen to water in reaction tanks and lakes, rivers and farms of sewage treatment plants, in order to cultivate aerobic microorganisms, increase the self-cleaning ability of water systems, and grow fish and shellfish at high density. The present invention relates to a membrane diffuser that disperses supplied air into fine bubbles in water to increase dissolved oxygen.

Conventional diffusers (散 氣管: Diffuser) is produced in a variety of forms, structures and materials are supplied with a variety of types. The diffuser formed by the corrosion resistant metal plate material and the diffuser formed using the pores formed by adhering the granular ceramic as the diffuser are excellent and durable. When the aeration is low and the oxygen supply is stopped, the water body flows back through the diffuser to the feeder, so that deposits accumulate inside the feeder. Even if a check valve is installed at each air inlet of the diffuser to prevent backflow, it is less effective than the cost.

Among the conventional diffusers, the membrane diffuser (Membrane Diffuser) in which the fine diffuser is punctured in the soft membrane has the highest oxygen transfer rate. However, because the membrane diffuser is a structure in which the elastic membrane expands by compressed air supplied from the blower, it may be over-expanded or ruptured or lose its elasticity. In this case, there is a problem of colliding with the flowing carrier to be worn or broken.

In addition, the conventional membrane diffuser is configured to arrange the EPDM disc and the upper case on the lower case and to assemble the fixing frame to the lower case by screwing. The screw type for forming the acid and bone together in the fixed frame and the lower case takes a long time to draw out the mold during injection, so the productivity of the injection molding machine is low, the wage rate required for molding and assembly is increased, and the assembly state is not firm or uniform. Can not do it. In addition, when assembling using the bolt and the nut there is a problem that the assembly is not firm, such as loose assembly or loosening the bolt nut. Since bolts and nuts, which are expensive corrosion-resistant metal materials, are assembled by manpower, it is uneconomical because the procurement cost and labor cost are excessive.

In addition, the conventional membrane diffuser requires at least three molded parts such as an upper case, a lower case, and a fixing frame, except for assembly parts such as bolts and nuts, which is uneconomical in terms of material requirements, molding, and parts management. As a result, the logistics cost increases, and the capacity of the reactor is encroached.

Therefore, the present invention has been made to overcome the problems of the prior art as described above, the oxygen transfer rate is high, the components are simple and easy to assemble, economical, the quality is stable and robust, and the crack and rupture of the membrane A technical challenge is to provide a membrane diffuser that can be prevented and protected from external impacts.

In addition, the technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. Could be.

The diffuser according to the present invention for achieving the above object, the bubble is generated in the water and made of a stretchable material and a plurality of fine diffuser is formed membrane, and the air supply port that can be supplied with air from the blower And a first body provided, a second body provided with an air outlet for supplying air to the membrane, and a component such as a fixing frame for fixing the membrane.

In the assembling of the component, the fixing frame, the second body, and the first body are formed of synthetic resin, and the membrane and the second body are sequentially inserted into the fixing frame, and the first body and the second body. And the fixing frame is fused to each other. Here, the fusion bond is made of at least one of thermal fusion bonding, ultrasonic fusion bonding and rotational fusion bonding.

Thermal fusion bonding is a heating process and a bonding process that combines the first body and the second body and the fixing frame formed of a synthetic resin with a heat transfer plate and heat them by pressing them together in a molten state and then cooling and bonding them together. do.

Ultrasonic fusion is to irradiate ultrasonically to the joints of the parts formed of synthetic resin and to combine them by pressing and cooling in the molten state by using heat generated by molecular vibration.

The thermal fusion bond and the ultrasonic fusion bond are fusion-bonded very tightly and integrally, so it is excellent in durability and airtightness. However, the heat fusion is dualized by a heating process and a bonding process, and a heater and a presser are required, so that the process is complicated and the assembly time is long. In addition, the ultrasonic fusion requires expensive equipment, low energy efficiency, and when the ultrasonic leaks, the working environment is hindered.

The rotary fusion bond has many advantages over thermal fusion and ultrasonic fusion. However, rotation fusion bonding may damage the membrane while rotating the fusion portion at high speed while the second body and the fixing frame rotate at different speeds. Therefore, in the present invention, the outer surface of the second body and the inner surface of the fixing frame are each formed with an uneven portion of a shape corresponding to each other, and the membrane and the second body in the interior of the fixing frame After the sequential insertion, the second body and the fixing frame were brought into contact with the coupling part of the first body and rotated at a high speed to achieve a fusion coupling. Since the second body and the fixing frame are fixed to each other by the uneven portion, the membrane is not damaged and rotational fusion is possible. Such rotational fusion coupling can ensure a uniform fusion quality, less energy requirements, shorter fusion time, simple configuration and fusion process of the equipment.

In addition, in the present invention, the protective mesh is provided spaced apart from the outer surface of the membrane by a predetermined interval to prevent the membrane from being over-expanded by the compressed air supplied from the blower and to prevent the membrane from deteriorating elasticity, cracking and rupture. The protective mesh serves as a function of preventing the abrasion of the membrane from the fluidized bed carrier which is filled for the attachment of microorganisms or suspended matter such as the floating wood in water.

In addition, in the present invention, the protective mesh is also installed in a conventional membrane diffuser assembled by a conventional screw or bolt nut to extend the life of the membrane.

In addition, in the present invention, by forming the protective net body integrally with the fixing frame to ensure excellent durability and reduced assembly parts.

In addition, in the present invention, the physical properties of the first frame and the second body by directly fusion bonding the fixing frame and the second body and the first body is fixed to the inside of the fixing frame without fusion welding. Molding is possible with different materials.

In addition, in the present invention, the second body is provided with an air outlet port, one or more air outlet port is supplied to the air so that the air can be directly blown from the air supply port provided in the first body to the lower surface of the membrane It was configured to penetrate directly with the sphere. Since the second body is omitted and the fixing frame and the first body are directly assembled, the air accommodating part is omitted by itself. Therefore, the volume of the diffuser is reduced, so the amount of transportation is reduced, the residence time of the reactor is not eroded, and it is economical in terms of material requirements, molding cost, and parts management.

The membrane diffuser according to the present invention having the above-described configuration is installed in a reaction tank, a lake, a river, and a fish farm of a wastewater treatment plant, and by dispersing fine bubbles to increase dissolved oxygen in water, cultivating aerobic microorganisms and midnight water system Increased capacity and the ability to grow fish and shellfish at high density.

In addition, the membrane diffuser according to the present invention can provide a diffuser that is structurally robust and excellent airtightness, simple configuration and economical, and prevents damage to the membrane of the soft material to maintain a high oxygen transfer rate and stable have.

1 is a side cross-sectional view showing the components constituting the membrane diffuser according to the first embodiment of the present invention.
2 is a side sectional view of a membrane diffuser in accordance with a first embodiment of the present invention;
3 is a cross-sectional view along line AA of the membrane diffuser shown in FIG. 2.
Figure 4 is a side cross-sectional view showing the operation of the membrane diffuser according to the first embodiment of the present invention.
Figure 5 is a side cross-sectional view showing the components constituting the membrane diffuser according to a second embodiment of the present invention.
6 is a side sectional view of a membrane diffuser in accordance with a second embodiment of the present invention;
Fig. 7 is a side sectional view showing operation of the membrane diffuser according to the second embodiment of the present invention.
Figure 8 is a side cross-sectional view of a membrane diffuser with a protective mesh in accordance with the present invention.
9 is a plan view of the membrane diffuser with a protective mesh according to the invention.
10 is a perspective view showing a protective mesh is provided in the membrane diffuser according to the first embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 is a side cross-sectional view of components shown for explaining a first embodiment of a membrane diffuser according to the present invention.

1 illustrates components of a separated state before the membrane diffuser according to the present invention is fusion-coupled, and includes a membrane 10 made of a stretchable material and having a plurality of diffusers 60 formed therein, and at least one air supply. A first body 20 having a sphere 70, a second body 30 having at least one air outlet 80, and a fixing frame 40 for fixing the membrane are illustrated. The membrane and the second body may be sequentially inserted into the fixing frame, and the first body, the second body, and the fixing frame may be fusion-bonded to complete the diffuser, and the fusion bonding may be performed by thermal fusion bonding. Ultrasonic fusion bonding and rotational fusion can be selected.

In addition, the component may be fused and fused by forming a shape that can be assembled in the order of inserting the second body and the membrane sequentially in the interior of the first body, the membrane diffuser according to the present invention is assembled order Is not limited.

2 is a side cross-sectional view of a membrane diffuser according to a first embodiment of the present invention.

Membrane 10 made of a stretchable material and formed with a plurality of diffusers 60, the first body 20 is provided with at least one air inlet 70, and the at least one air outlet 80 is provided 2, the body 30 is formed with an air receiving portion 90 which is a space that can be supplied with the air is ejected.

In order to secure a wide area of the welded portion so as to be firmly coupled to the first body to form a double-sided inclined groove, the second body and the fixing frame is shown an enlarged embodiment to be molded by welding each of the edge-shaped protrusions. . 2 illustrates a state in which an air supply port of the membrane diffuser is connected to the air supply pipe 100, and when the air is not supplied, the membrane 10 is secondly formed by water pressure or shrinkage of the membrane. It is in close contact with the upper surface of the body 30, the air outlet is closed so that the water body does not flow back to the air receiving portion 90 and the air supply pipe (100).

3 is a cross-sectional view along line A-A of FIG. 2 showing a membrane diffuser according to a first embodiment of the present invention.

The fusion process and device configuration is simple and economical to apply a rotational fusion coupling, the second body 30 and the fixing frame 40 is fixed so as not to face each other to prevent damage to the membrane by rotation On the outer surface of the body and the inner surface of the fixing frame were formed irregularities (凹, 凸) of the shape corresponding to each other. By inserting the membrane and the second body in the interior of the fixing frame in order and being fixed by the concave-convex portion, the second body and the fixing frame is in contact with the first body and rotated by rotation welding Combination is possible.

4 is a side cross-sectional view showing the operation of the membrane diffuser according to the first embodiment of the present invention.

When compressed air is supplied to the air supply port 70 through the air supply pipe 100, the air introduced into the air receiving unit 90 is evenly distributed to the air outlet 80, and is ejected to the rear surface of the membrane 10. As the membrane expands due to the blown air, the air diffuser 60 is opened and fine air bubbles are dispersed in the water to give up.

In order to increase the area of the welded portion, the welded portion has a step, and an enlarged embodiment has been shown in which the welded area of the fixing frame 40 and the first body 20 of the outer portion which are greatly influenced by external force can be increased.

Since the fixing frame and the first body are firmly fused and the lower part of the second body 30 is supported by the first body, physical properties may be different. For example, the fixing frame and the first body, which are heavily fused and externally influenced, are molded of ABS (Acrylonitrile-Butadiene-Styrene) resin having excellent physical properties and expensive, and are inserted into the second, so that the external influence is less. The body can be molded with low cost materials such as PP (Polypropylene) and PE (Polyethylene) while having low strength. Here, the second body may be formed of the same material or fused material as that of the first body and the fixing frame, and may be integrally formed by fusion bonding with at least one of the first body or the fixing frame.

As described above, the membrane diffuser according to the present invention includes a membrane, and at least any two of the fixing frame, the first body, and the second body are fused to each other.

The welded portion is not limited to the edge type of FIG. 2 and the inner upward stepped shape of FIG. 4, and may be applied without limitation to a shape that can be firmly fused such as a sawtooth shape and a stepped shape (not shown) formed to the outer upward direction. have.

5 is a side cross-sectional view showing components of a membrane diffuser according to a second embodiment of the present invention, in which the second body is omitted in the first embodiment.

The components in the separated state before the membrane diffuser of the second embodiment according to the present invention is fusion-coupled, the membrane 10 made of a stretchable material and formed with a plurality of diffusers 60 and one or more air supply The first body 20 provided with the sphere 70 and the fixing frame 40 for fixing the membrane are shown, respectively.

The membrane may be inserted into the fixing frame, and the first body and the fixing frame may be combined to complete the diffuser, and may be assembled with a screw or bolt nut, or may be fusion-bonded.

Figure 6 is a side cross-sectional view of the membrane diffuser according to a second embodiment of the present invention, and as the first body is omitted, the air receiving part is naturally omitted.

It is composed of a membrane (10) made of a stretchable material and formed with a plurality of diffusers (60), and a first body (20) provided with at least one air supply port (70) and at least one air outlet port (80a).

The air supply port of the membrane diffuser is connected to the air supply pipe 100, and the air diffuser is omitted at the upper side of the air outlet port 80a. As the membrane 10 is in close contact with the surface of the first body 20, the air outlet is sealed, so that the water body is prevented from flowing back to the air supply pipe 100, and an air diffuser is formed in the membrane corresponding to the air outlet. It is desirable not to.

7 is a side cross-sectional view showing the operation of the membrane diffuser according to the second embodiment of the present invention.

When compressed air is supplied to the air supply port 70 through the air supply pipe 100, the compressed air is ejected directly from the air outlet port 80a to the rear surface of the membrane 10. As the membrane expands due to the blown air, the air diffuser 60 is opened and fine air bubbles are dispersed in the water to give up.

A string groove (not shown) may be formed on the upper side surface of the first body with respect to the air outlet 80a, and the string groove may be arranged in a spiral, lattice, or radial shape. Since compressed air is uniformly supplied to the rear surface of the membrane while the compressed air moves through the row grooves, bubbles may be generated evenly throughout the membrane.

Figure 8 is a side cross-sectional view of a membrane diffuser with a protective mesh in accordance with the present invention.

If the excessive air supply to some diffuser is biased due to the initial operation of the blower or the unbalance of air distribution in the blower pipe, this causes the membrane to over-expand and expand the diffuser, resulting in lower oxygen transfer rate or cracking or rupture of the membrane itself. Can be.

Therefore, the protective mesh 50 is installed on the upper surface of the outer surface of the membrane 10 at predetermined intervals, and the expansion of the membrane is suppressed by the protective mesh to prevent the elasticity of the membrane from being lowered or broken. . For example, when the separation distance between the membrane and the protective mesh is 15 mm, it is possible to suppress the expansion of the membrane to the top by excessively exceeding 15 mm or more.

In addition, when the protective mesh 50 is integrally molded with the fixing frame 40, the connection part is firm, the number of components is reduced, and the assembly process can be simplified.

9 is a plan view of a membrane diffuser in accordance with the present invention.

The membrane 10 is installed in the lower portion of the radial protective mesh 50 installed in the fixing frame 40, and is shown to be protected from external shock. The protective net can be applied without limitation as long as it protects the membrane, such as lattice, honeycomb structure, inhibits over-expansion, and bubbles can flow.

10 is a perspective view showing a state in which a protective mesh is provided in the membrane diffuser according to the first embodiment of the present invention.

The air supply port 70 is provided in the lower part of the membrane diffuser, and the fixing body 40 provided with the first body and the protective mesh 50 and the membrane 10 are provided in the lower protective mesh.

In the foregoing, the present invention has been described in detail based on the embodiments and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the content of the following claims.

10 ... Membrane 20 ... First body
30 ... second body 40 ... fixing frame
50 protective mesh 60 ...
70 Air supply port 80, 80a Air outlet port
90.Air receiver 100 ... Air piping

Claims (9)

delete delete A first body 20 having an air supply port 70 penetrating up and down at a center side thereof;
A second body 30 having a plurality of air outlets 80;
An air accommodating part 90 formed between the first body and the second body;
Membrane (10) formed of a stretchable material and including a plurality of diffusers (60), which are in close contact with the upper surface of the second body during aeration and seal the air outlets at other portions where the diffusers are disposed (10). );
A fixing frame 40 having a ring shape and having the membrane 10 inserted therein and fixed thereto; And
And a protective net 50 formed integrally with the fixing frame and spaced apart from the upper side of the membrane to protect the membrane 10.
Fixing frame and the first body is a fusion bonding is made in contact with each other in the outer portion, the step is formed in the first body so as to increase the fusion area is inserted into the lower side of the fixing frame,
The membrane and the second body are sequentially inserted into the fixing frame so that the lower part of the second body is supported by the first body, and the membrane is fused and bonded to the first body and the fixing frame. 2 is placed in close contact with the surface of the body,
When the aeration, compressed air is blown directly from the air outlet to the back of the membrane to expand the membrane and open the diffuser. delete delete delete delete delete delete

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