CN215756693U

CN215756693U - High dissolved oxygen wide band type micropore aeration device

Info

Publication number: CN215756693U
Application number: CN202121123554.2U
Authority: CN
Inventors: 朱杰; 周朝雁
Original assignee: Beijing Pulijuno Environmental Protection Technology Co ltd
Current assignee: Beijing Pulijuno Environmental Protection Technology Co ltd
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2022-02-08
Anticipated expiration: 2031-05-24

Abstract

The utility model provides a high dissolved oxygen wide band type micropore aeration device, which comprises: aeration support and aeration membrane, the aeration membrane is double-deck bag type structure, surface mounting has the air cock on it, and it has a plurality of aeration micropores to distribute, the aeration support includes main part and buckle portion, the main part is the long flat form cavity body of 1-6 meters, its top is the curved surface of kickup, the bottom is the plane, buckle portion is located the main part both sides, and rather than an organic whole connection, buckle portion upwards stretches out, its top is buckled, form one and fold back "style of calligraphy structure, form the draw-in groove between buckle portion and the main part, the aeration membrane covers the surface at the main part, the both sides of aeration membrane are located the draw-in groove, and through a buckle spare and buckle portion, compress tightly the both sides of aeration membrane at the buckle portion. The aeration support is simple in structure, convenient to install, low in cost, low in height, long in retention time of bubbles in water, greatly improved in oxygen utilization rate, reduced in energy consumption and environment-friendly, and a large number of gas transmission pipelines and joints are not needed.

Description

High dissolved oxygen wide band type micropore aeration device

Technical Field

The utility model relates to the technical field of sewage treatment equipment, in particular to a high dissolved oxygen broadband type micropore aeration device.

Background

The aerator is an oxygen dissolving device which diffuses air into water through micropores and ensures the growth of microorganisms in the water by dissolving oxygen in the air into the water, and is widely applied to biochemical reaction tanks in sewage treatment, oxygenation processes of aquaculture water and the like.

In the application of sewage treatment, air introduced by the air blower generates a large amount of micro bubbles through the aeration device, so that oxygen in the air is diffused into water in the biochemical reaction tank, sufficient dissolved oxygen is provided for microorganisms in the water, and meanwhile, the stirring effect is generated on biochemical sludge in the water tank.

Most of the high-performance aeration membrane materials adopted at present are ethylene propylene diene monomer, silica gel and polyurethane PU, and traditional materials such as PVC, ceramics and the like are replaced. According to different characteristics and performance indexes of materials, the following three types of aerators are high-performance aeration membranes with the largest application range at present.

1. The aeration hose is an aeration membrane made of soft materials (polyurethane PU), the peripheral surface of the hose is provided with micro air holes, and the common aeration hose is phi 65 mm;

2. the disc aerator is characterized in that a flexible membrane (ethylene propylene diene monomer and silica gel) which is fully distributed with air holes is hermetically arranged on an air supply support, the support is connected with an air supply main pipeline, and the disc aerator is in a disc shape with the general size of phi 200-350 mm;

3. the tubular aerator is characterized in that a soft aeration membrane (ethylene propylene diene monomer, silica gel and polyurethane PU) which is fully distributed with holes is hermetically arranged on the aeration support pipe and is connected with a main air supply pipeline, the general size of the tubular aerator is phi 65mm, and the length of the tubular aerator is 500-1000 mm.

The oxygen utilization rate of the three high-performance aerators is between 28 and 36 percent, and the oxygenation capacity is more than 0.16KgO²The theoretical power efficiency is 6-10 KgO2/kWh, the resistance loss is less than 4000Pa, and the product standard of the environmental protection industry is met.

However, the high-performance aerator also has some problems, firstly, in the sewage treatment operation, nearly 50% of the operation cost comes from electricity consumption, most of the electricity consumption is supplied to the air blower of the aeration system, the aerator has high energy consumption and low oxygen utilization rate and nutrient filling capacity, and is not in line with the development trend of the sewage treatment industry of saving energy consumption and protecting environment.

Secondly, in the practical application of the sewage treatment biochemical tank, generally, each biochemical tank needs to be paved with several hundreds to several kilometers or more than ten kilometers of aerators to form an aeration system, the installation of the aeration system consisting of the disc-type aerators and the tubular aerators needs to install a large number of gas transmission main pipes and branch pipes for ensuring the aeration effect, each gas transmission main pipe is connected with each branch pipe, a large number of gas transmission pipe joints and sealing pieces are needed, the installation is troublesome, the cost is high, and due to the fact that the joints are numerous, faults are easy to occur, and the safety and the stability of the aeration system are poor. Although the laying of the aeration hose is the least amount of the gas transmission pipeline, in the laying operation process of the hose, due to huge water buoyancy, relatively large investment on a hose stability-balancing facility is needed, the cost of the stability-balancing facility is generally not less than that of the hose, and therefore the cost is high.

In view of the above-mentioned reason, this application provides a novel micropore aeration equipment, and it is simple and convenient that it not only installs, greatly the cost is reduced, can satisfy large tracts of land aeration demand, and through configuration optimization design, can improve oxygen utilization ratio, practices thrift the energy consumption.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-dissolved-oxygen wide-band type microporous aeration device which is simple in structure, convenient to install, low in cost and suitable for large-area aeration requirements.

The utility model provides a high dissolved oxygen wide band type micropore aeration device, comprising: aeration support and aeration membrane, the aeration membrane is multilayer bag formula structure, and its surface mounting has the air cock, the aeration support includes main part and buckle portion, the aeration membrane covers the surface of main part, just buckle portion is provided with rather than complex buckle spare, makes the both sides of aeration membrane compress tightly buckle portion.

Preferably, the bottom of the main body is a plane, the top of the main body is a curved surface which is bent towards one side far away from the bottom of the main body, the buckling parts are arranged on two sides of the main body and are integrally connected with the main body, a clamping groove is formed between the buckling parts and the main body, and the buckling parts press two sides of the aeration membrane in the clamping groove.

Preferably, the main body is a hollow pipe fitting, the bottom of the main body is a plane, and the top of the main body is an arc surface which is bent to one side far away from the bottom of the main body.

Preferably, the locking portion extends upward from both sides of the bottom of the main body, and a top portion of the locking portion is bent toward a side close to the main body to form a fold-back type structure.

Preferably, the buckle piece is a strip-shaped plastic piece, and protruding structures are arranged on two sides of the strip-shaped plastic piece, and the buckle piece is located below a fold-back type structure of the buckle part and matched with the clamping groove to press two sides of the aeration membrane tightly in the clamping groove.

Preferably, the aeration membrane is of a double-layer bag type structure, is formed by one-time extrusion molding of any one of polyurethane, silicon rubber, EPDM rubber, PE and PVC, and is sealed at two ends in a heat sealing mode.

Preferably, a plurality of aeration micropores are formed on one surface of the aeration membrane.

Preferably, the length of the aeration membrane is 1-6 m, the width is 80-300 mm, and the thickness is 0.3-2.6 mm.

Preferably, the air tap is formed by polyurethane injection molding and is in heat seal with the aeration membrane, and external threads are arranged on the peripheral surface of the air tap and are used for being matched and connected with the gas transmission pipeline.

Preferably, the material adopted by the aeration support is any one of PE, nylon, iron and stainless steel.

Compared with the prior art, the utility model has the following beneficial effects:

1. compared with the common high-performance aerator, the wide-band microporous aerator can reduce the number of sealing ports and joints by more than 90 percent (under the condition that the length of the aerator is 2-6 meters), minimize the resistance loss of air flow, be more convenient and quicker to install, greatly save the material and labor cost, reduce the fault point of the aerator system by more than 90 percent, and ensure the safety and the stability of the long-term operation of the aerator system;

2. the aeration membrane is made of flexible materials and can cover the surface of the aeration support, and because the aeration membrane is in a multilayer bag shape, gas enters the aeration support from an air nozzle and is full and discharged from micropores;

3. the main body of the aeration support is a flat hollow pipe body, and as water flows into the hollow pipe body, considerable water buoyancy is overcome to a certain extent, and the aeration support can be arranged at the bottom of the biochemical tank only by arranging a small amount of fixing devices.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a cross-sectional view of a micro-porous aeration apparatus according to the present invention;

FIG. 2 is a schematic view showing the structure of an aeration membrane according to the present invention.

Description of reference numerals:

1: an aeration support; 101: a main body; 102: a fastening part; 103: a card slot; 2: an aeration membrane; 3: an air tap; 4: aerating micropores; 5: and a fastener.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention provides a high dissolved oxygen wide band type micro-porous aeration apparatus, as shown in fig. 1 and 2, comprising: the aeration device comprises an aeration support 1 and an aeration membrane 2, wherein the aeration membrane 2 is of a double-layer bag type structure made of flexible materials, the middle part of the upper surface of the aeration membrane 2 is provided with an air nozzle 3, the air nozzle 3 can be communicated with an external air source through an air pipeline, and a plurality of aeration micropores 4 are distributed on the upper surface of the aeration membrane 2.

The aeration support 1 comprises a main body 101 and a buckling part 102, wherein the main body 101 is a flat hollow pipe body, the bottom of the main body 101 is a plane, the top of the main body is an upward curved arc surface, and the aeration membrane 2 covers the top surface of the main body 101.

The locking parts 102 are located on both sides of the main body 101, and have bottom portions flush with the bottom portion of the main body 101 and integrally connected to the main body 101, the locking parts 102 extend vertically upward from both sides of the main body 101, and have top portions bent toward a side close to the main body 101 to form a fold-back type structure, and a vertical locking groove 103 is formed between the locking parts 102 and the main body 101. The two side edges of the aeration membrane 2 are positioned at the bottom of the clamping groove 103, and the two side edges of the aeration membrane 2 are pressed in the clamping part 102 through the clamping part 5 matched with the clamping groove 103.

The fastener 5 is an elongated plastic member, and has a surface provided with protruding structures at upper and lower ends, and the fastener 5 is disposed below a fold-back type structure of the fastener 102 and is insertable into the clamping groove 103 to press both side edges of the aeration membrane 2 against the bottom of the clamping groove 103, so that the aeration membrane 2 is fixed to the aeration holder 1 before ventilation, and is prevented from being subjected to positional deviation due to factors such as buoyancy after ventilation.

The aeration support 1 is made of any one of PE, nylon, iron and stainless steel and is formed by injection molding and integral molding or cutting by a machine tool. The length of the aeration support 1 is 1-6 m, the width can be set with various different specifications according to the width of the aeration membrane 2, and the aeration membrane 2 can be laid on the top of the main body 101.

The aeration membrane 2 is a double-layer bag type structure, the adopted material is any one of polyurethane, silicon rubber, EPDM rubber, PE and PVC, a tubular membrane with the thickness of 0.3 mm-2.6 mm is processed by adopting a one-time extrusion molding mode, a plurality of aeration micropores 4 are processed on one surface of the tubular membrane, and then a high-frequency heat sealing machine is used for carrying out heat sealing on openings at two ends of the tubular membrane.

The diaphragm made of the materials has the advantages of strong tension, high tensile tearing strength, wear resistance, flexing resistance, penetration resistance, low temperature resistance, hydrolysis resistance, acid and alkali resistance and the like, has good resilience, long service life, is nontoxic and tasteless, and is an environment-friendly elastic diaphragm.

The air nozzle 3 is formed by polyurethane injection molding and is thermally sealed with one surface of the aeration membrane 2, which is provided with aeration micropores 4, external threads are arranged on the peripheral surface of the air nozzle 3 and are used for being matched and connected with one end of the gas transmission pipeline 5, and the gas transmission pipeline 5 can be communicated with an external gas source (such as a blower and the like), so that air is introduced into the aeration membrane 2 and bubbles are formed by the aeration micropores 4 and are emitted.

Because the main body 101 is a hollow structure, water can flow into the main body, so that considerable water buoyancy is overcome to a certain extent, and the aeration support 1 can be arranged at the bottom of the biochemical pool only by arranging a small amount of fixing devices at the bottom of the aeration support 1. The installation height of the aerator is 30-60mm lower than that of other common aerators, and the rising height of bubbles is increased under the condition that the water level of the biochemical tank is certain, so that the oxygen dissolving time of the bubbles in water is prolonged, and the oxygen utilization rate is improved to the maximum extent.

The improvement of oxygen utilization rate under the same air intake quantity depends on the quantity and the size of the bubbles and the retention time of the bubbles in water. The number and size of the air bubbles are determined by the number and pore size of the aeration micro-pores 2, and the air bubbles generally have certain specifications and cannot be specially adjusted. In the bubble escape process, a large amount of bubbles escape from the membrane under the action of the blower, and the water density in a water area (in the range of 0-800 mm) above the membrane is reduced due to the addition of a large amount of micro-bubbles. Under the action of normal water pressure on two sides, a phenomenon called vortex effect in fluid mechanics is formed, the vortex effect enables bubble distribution to become narrow and rise in an accelerated manner, the vortex effect can cause the reduction of oxygen utilization rate, and the principle of energy conservation and environmental protection is violated.

The utility model designs the structure and the size of the microporous aeration device as follows so as to overcome the vortex effect and improve the oxygen utilization rate.

1) Optimizing the width of the aeration membrane

Research and experiments show that under the same air flow, the wider the aeration membrane is, the smaller the vortex effect is, and the experimental results and comparison are shown in the following table 1.

TABLE 1

Under sewage treatment and other dissolved oxygen environmental demands, slower bubble rising speed and bigger bubble service area can be bigger to improve the efficiency of oxygen dissolving in water and the water stirring function. Therefore, in the embodiment, the width of the aeration membrane 2 is designed to be 80 mm-300 mm, the thickness is 0.3 mm-2.6 mm, the length specification can be determined according to the size of the biochemical pool needing to use the microporous aeration device, the length of a single aeration membrane is generally within the range of 1-6 m and matched with the length of the aeration support 1, and the comprehensive benefit of the whole aeration system is greatly improved while the high dissolved oxygen rate is ensured.

2) Optimized aeration support structure and punching direction

This embodiment has changed the direction of punching of 1 both sides angle of aeration support and aeration membrane 2, the top that makes 1 main part 101 of aeration support is the cambered surface of kickup, aeration membrane 2 covers on its surface, because aeration membrane 2 has higher elasticity and flexibility, consequently, the bubble that emerges from its both sides can be escaped to side, the bubble that escapes to both sides can partially offset outside water pressure, thereby further overcome vortex effect, slow down bubble rise time, thereby improve bubble residence time in aqueous, reach the purpose that improves the oxygen utilization ratio.

3) Reduce the installation height of the aeration device

In this embodiment, the aeration support 1 is a flat hollow pipe with a flat bottom, and external air enters from above, so that the aeration support 1 can be installed at the bottom of the biochemical tank by a simple installation method, and the installation height is 30-60mm lower than that of any other common aerator. Under the condition that the water level of the biochemical pool is constant, the rising height of the bubbles is increased, and the oxygen dissolving time of the bubbles in water is prolonged, so that the oxygen utilization rate is improved to the maximum extent.

Compared with the traditional high-performance aerator, the microporous aeration device of the utility model saves more energy consumption and greatly improves various performances, and the comparison is shown in the following table 2.

TABLE 2

In addition, compared with a common high-performance aerator, the microporous aeration device provided by the utility model has the advantages that when a single microporous aeration device with the length of 2-6 meters is adopted, the number of required sealing ports and joints can be reduced by more than 90%, so that the resistance loss of air flow is minimized, the installation is more convenient and faster, the material and labor cost is greatly saved, and the failure point of an aeration system is reduced by more than 90%. Under the actual scene that a common sewage treatment plant (with the daily treatment capacity of thousands to tens of thousands tons) needs to install hundreds to thousands of aeration devices as an aeration system, the cost of a gas transmission pipeline is reduced by more than 50 percent, and the safety and the stability of the long-term operation of the aeration system are ensured.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high dissolved oxygen broadband microporous aeration apparatus, comprising: aeration support and aeration membrane, the aeration membrane is multilayer bag formula structure, and its surface mounting has the air cock, the aeration support includes main part and buckle portion, the aeration membrane covers the surface of main part, just buckle portion is provided with rather than complex buckle spare, makes the both sides of aeration membrane compress tightly buckle portion.

2. The wide band microporous aerator of claim 1, wherein the bottom of the body is a flat surface, the top of the body is a curved surface curving away from the bottom, the locking parts are disposed on both sides of the body and integrally connected to the body, a locking groove is disposed between the locking parts and the body, and the locking parts press both sides of the aeration membrane into the locking groove.

3. The wide band microporous aeration apparatus of claim 2, wherein the body is a hollow tube with a flat bottom and a curved top facing away from the bottom.

4. A high dissolved oxygen wide band micro aeration apparatus according to claim 2, wherein said latch portions are formed to extend upward from both sides of the bottom of said body, and the top portions of said latch portions are bent to a side close to said body to form a fold-back type structure.

5. The wide band micro-aeration device with high dissolved oxygen according to claim 4, wherein the latch is a plastic bar having a protrusion on both sides, and the latch is located below the fold-back-type structure of the latch and cooperates with the slot to press both sides of the aeration membrane into the slot.

6. The wide band type microporous aeration apparatus of claim 1, wherein the aeration membrane is a double-layered bag structure formed by one-time extrusion molding of any one of polyurethane, silicone rubber, EPDM rubber, PE and PVC, and both ends of the membrane are sealed by heat sealing.

7. The wide band type microporous aeration apparatus of claim 6, wherein a plurality of aeration micropores are formed on one surface of the aeration membrane.

8. The wide band type microporous aeration apparatus of claim 6, wherein the length of said aeration membrane is 1-6 m, the width is 80-300 mm, and the thickness is 0.3-2.6 mm.

9. The wide band microporous aerator of claim 1, wherein said nozzle is made of polyurethane by injection molding and sealed with said aeration membrane, and said nozzle has external threads on its outer surface for mating with a gas pipe.

10. The wide band microporous aeration apparatus of claim 1, wherein the aeration support is made of PE, nylon, iron, or stainless steel.