CN215102259U - Oxygen-charging and gas-distributing element - Google Patents

Abstract

The utility model relates to an oxygenate gas distribution component, this gas distribution component have, at least one gas interface and at least one gas diffusion piece and parcel gas diffusion piece have enough degree of depth's surrounding edge, by the leading-in gas diffusion piece lower part of gas interface to through the leading-in upper portion's of the gaseous escape mouth on the gas diffusion piece liquid, form small bubble. Due to the resistance of the gas escape opening, a gas bin which is equivalent to the resistance is formed between the surrounding edge and the air dispersing sheet package, so that the gas is uniformly distributed at the lower part of the air dispersing sheet, and the liquid at the lower part is blocked by the gas bin, does not contact with the lower side of the air dispersing sheet and keeps a certain distance with the lower side of the air dispersing sheet, so that the surface of the lower side of the air dispersing sheet is kept clean.

Description

Oxygen-charging and gas-distributing element

Technical Field

The utility model belongs to the sewage treatment field relates to a gas distribution component, especially relates to a gas distribution component that oxygenates that helps gas to distribute evenly in the gas distribution space.

Background

Gas distribution elements are commonly used in chemical biological purification of wastewater to provide dissolved oxygen for bacterial activity in the sludge-pollutant-water mixture in the bioreactor to degrade or oxidize organic and inorganic components in the wastewater.

The aeration process is also commonly called aeration process in the aeration process of biological sewage purification treatment. The equipment required for this process is collectively referred to as aeration equipment. The aeration equipment is divided into mechanical aeration, jet aeration or compressed air aeration and other types of equipment and modes according to different aeration modes. The compressed air distribution element is usually installed at the bottom of the bioreactor, compressed air is produced by means of a blower or a compressor, and the compressed air is guided to each distribution element through a tubular distribution system, the generated bubbles move from the bottom to the liquid surface, and meanwhile, part of oxygen contained in the bubbles is dissolved in the liquid for the purpose of oxygenation.

The compressed air distribution device is divided into a coarse bubble distribution device, a middle bubble distribution device and a micro bubble distribution device according to the size of the generated bubbles. Among them, the micro-bubble air distribution device, also commonly referred to as a micro-pore aeration device, is a mainstream application form at present because the generated bubbles are fine, the surface area to volume ratio is relatively large, and the oxygen transfer efficiency is relatively high.

In actual use, there are large and medium bubble type gas distribution tubes made of rigid metal or plastic, and micro-bubble gas distribution elements made of gas permeable ceramic sheets. There are also medium and fine bubble aeration elements with perforated elastic membranes made of EPDM, silica gel or TPU glue films or the like, which are tensioned and fixed on rigid supports. These gas distribution elements are typically manufactured in the form of circular or oval tubes, circular disks, smaller elongated plates, or large rectangular plates, etc.

The economics of a compressed air distribution system depend on various factors including, among others, the size of the generated bubbles, the pressure loss of the air as it escapes from the distribution element, the uniformity of the bubble size and the amount of distribution per unit area.

Indeed, gas distribution elements made of rigid metal or plastic are only used to produce mixing and water circulation by large air bubbles (e.g. in aerated grit chambers) and are not suitable for good oxygen input. Furthermore, as soon as the air supply is stopped, deposits and blockages due to solid particles deposited inside the tubes occur rapidly in these gas distribution tubes. In addition, since the ceramic sheet gas distribution member (a disc type, a plate type or a tube type) may be easily clogged with sludge or solid particles once the air supply is stopped, or clogged due to the growth of microorganisms in pores, the practical use of the ceramic gas distribution member is less and less in spite of the good oxygenation efficiency. Because of easy pollution and blockage, the ceramic chip gas distribution element must be cleaned by special chemistry frequently to ensure smooth airflow. For this reason, the ceramic parts must have a certain minimum design thickness in order to provide sufficient compressive strength (pressure difference between inside and outside) and fracture resistance, which also results in high pressure loss when gas is overflowed.

In the modern sewage biochemical treatment process, micro-bubble film type air distribution elements are mainly used, because the micro-bubble film type air distribution elements have stronger anti-clogging performance besides relatively better oxygenation performance. These gas distribution elements are suitable for more scenes, since the openings are closed again when the supply of compressed air is interrupted. The perforations of these membranes can vary in shape, size and thickness, and the thickness of these membranes is in most cases adapted to the process design and mechanical stress requirements. The shape and size of the membrane perforations, as well as the thickness and material of the membrane, also determine the pressure loss consumed by the compressed air to force the perforations to escape the membrane, and the degree of tightness at the time of closure. However, such soft gel films are also contaminated by contaminants in the liquid to change the properties, or are attached by microbial films to grow and partially harden, and regular online cleaning is also required. And with the aging of the membrane, the performance of the membrane gas distribution element is also influenced to a certain extent, and the oxygenation efficiency is reduced.

Fig. 1 schematically shows such a membrane gas distribution element in cross-section. This gas distribution element 1 is substantially formed by a central gas supply 2, a rigid carrier disk 3 and an elastic membrane 4, which is connected in a sealing manner to the carrier disk 3. The membrane 4 is provided with perforations 5 from which gas can escape when introduced under pressure from the gas supply 2 into the gas distribution element 1. The membrane 4 protrudes here over the mounting structure of the carrier plate 3, so that a gas-filled space is created between the carrier plate 3 and the membrane 4. Here, the left side of fig. 1 shows the state of the gas distribution element 1 when no gas is supplied, while the right side of fig. 1 shows the operating state when gas is introduced into the gas distribution element 1.

A disadvantage of the membrane gas distribution element is that, for example, compressed air must first expand the perforations (e.g., narrow slots) in order to escape in the form of bubbles. Here, the system loses energy in the form of pressure loss. When smaller slots or pinholes are chosen, smaller bubbles can be created and thus a better oxygenation effect is achieved, but the pressure loss is also increased and the energy efficiency is reduced. On the other hand, a bulge of the membrane is produced in the flat or plate-shaped membrane due to the pressure difference between the inner side and the outer side of the membrane, which bulge is greater the further away from the position to be fixed or tensioned. This bulging leads to an uneven distribution of the bubbles, since more bubbles will escape at the locations where the bulging is larger. During the ascent, a kind of polymerization of the bubbles may also occur, which polymerization leads to the formation of more agglomerates and thus to the production of larger bubbles and to a reduction of the oxygenation effect. The smaller slots or pinholes are adopted for the membrane, so that the membrane is stretched and deformed to a greater extent during working, the aging speed of the membrane is accelerated, and the closing tightness of the membrane when the inflation is stopped is reduced. In practice, it is often the case that the resilience of the membrane is reduced, which affects the closure of the membrane and, when the inflation is stopped, creates a physical space between the membrane 4 and the carrier plate 3, allowing contaminants or microorganisms to enter this space and form an internal blockage. In this case, the membrane gas distribution element cannot be cleaned on-line, and requires costly interruption of operation, manual cleaning of the bioreactor after cleaning or total replacement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oxygenating gas distribution component in order to solve the easy jam of current diaphragm gas distribution component perforation, thereby it provides one kind because of the pressure differential makes the diaphragm surface production uplift lead to oxygenating the defect that the effect reduces and provide one kind, this oxygenating gas distribution component can form the gas storehouse equivalent with the resistance between surrounding edge and the piece parcel of loosing gas because of the resistance in the tiny pore of gas escape mouth, help gas in the piece lower part evenly distributed that looses gas, and lower part liquid is by this gas storehouse separation, contactless gas piece downside that looses, and keep the certain distance with it, make gas piece downside surface that looses keep clean.

The utility model also aims to provide a gas distribution method applying the oxygen-charging gas distribution element.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an oxygenating gas distribution element, the gas distribution element comprising:

at least one gas access port;

at least one rigid solid gas diffusion sheet, wherein the surface of the gas diffusion sheet is provided with a plurality of gas escape ports;

and at least one surrounding edge, wherein the surrounding edge and the air dispersing sheet surround to form an air distribution space with enough volume;

the gas access port extends into the gas distribution space; and a check valve is arranged on the gas access port.

In the technical scheme, the utility model takes a horizontal rigid solid air diffusion sheet with fine perforations as a flat air distribution panel, the surface of the air diffusion sheet is provided with a plurality of air escape ports, and the air diffusion sheet can be made of metal or plastic or any material with certain water repellency; the air dispersing sheet and the surrounding edge surround to form an air distribution space together, and the air access port is positioned below the air dispersing sheet and positioned in the air distribution space.

Each gas escape opening in the gas dispersion sheet is individually formed as a capillary tube. After the gas enters the gas distribution space at the lower part of the gas distribution sheet through the gas access port, the gas is gathered between the surrounding edges due to the upper buoyancy caused by the fact that the specific weight of the gas is lighter than that of the liquid in the gas distribution space, and the gas is dispersed into the liquid through the gas escape port on the gas distribution sheet.

As a preferred scheme of the utility model, the thickness of the air diffusing piece is 2-5 mm.

In this technical scheme, according to the utility model discloses an it should select according to its material physical properties and pressure load to oxygenate the gas distribution component's gas diffusion piece material thickness, should compromise the demand of capillary effect simultaneously, forms enough big proportion in order to produce capillary effect with the aperture of the gas escape mouth of selecting. Considering that the air distribution resistance is increased along with the thickness of the air diffusion sheet, the thickness of the air diffusion sheet should not be too large. If excessive deformation may occur due to the thickness of the diffuser plate or due to the design of the diffuser plate with too large an area, which results in insufficient thickness of the material to support the gas pressure, it is necessary to design sufficient supporting and fixing members on the upper portion of the diffuser plate to prevent the excessive deformation. The thickness of the air dispersing sheet should be selected to be suitable for the material strength to basically ensure that the air dispersing sheet is kept flat and not deformed in the working state, and is enough to resist the buoyancy of the lower air bin, so the thickness of the air dispersing sheet in the utility model is preferably 2-5 mm.

As a preferred scheme of the utility model, the quantity of gas escape opening is 3000 and 6000, the size of gas escape opening is 0.1-0.3 mm.

In the technical scheme, the diameter of the gas escape openings meets the requirement of the process on the size of bubbles, and the number of the gas escape openings meets the process design target of the gas distribution element. Because the gas escape opening of solid-state gas dispersion piece is open, the gas that passes the pore need not to expend the energy and open again like passing the diaphragm during operation, simultaneously, can also select less opening size, suitably increase perforation density for realize higher oxygenation transfer efficiency, and needn't worry under the condition that suitably increases gas flow, gas pressure loss probably excessively increases, so the utility model discloses the quantity of gas escape opening is 3000 and adds 6000, and the size of gas escape opening is 0.1-0.3 mm.

As a preferred proposal of the utility model, the plurality of gas escape openings are circularly and evenly arranged.

In this embodiment, the gas outlets may be capillary perforations of the same diameter, so that the gas escaping from the gas dispersion plate is averaged at a stable gas inlet velocity over a long period of time.

As a preferred scheme of the utility model, the cross-section of gaseous ease export outwards is the trend that diminishes along the gas distribution space.

In this technical scheme, all have and realize higher oxygenation transfer efficiency when further making gas escape, gas escape outwards is the trend that diminishes along the gas distribution space, and the position size that gas escape is close to the inside liquid level of gas distribution space is great promptly, is the trend that diminishes on escape passage to make the inside pressure of gas distribution space increase slightly, can form a similar effect of spraying when making gas pass through gas escape, improve the oxygenation transfer efficiency.

As a preferable aspect of the present invention, the cross section of the gas distribution element includes one of a perfect circle, an ellipse, a square, a rectangle, or a strip cylinder.

In the technical solution, the oxygen aeration and distribution element according to the present invention may take various planar geometries, such as, but not limited to, a right circular disc, an oval disc or sheet, a square or rectangular or strip-like cylinder, a large rectangular plate with one or more gas inlets, etc. The depth of the lower surrounding edge can be reasonably adjusted according to the size of the gas escape opening of the gas dissipation sheet and the pressure difference generated by the design of the number of the open holes and the ventilation volume.

As an optimized proposal of the utility model, the connection mode of the air diffusing piece and the surrounding edge comprises one of integrated production, welding fixation, bolt fixation, bonding fixation or clamping groove fixation.

As a preferred scheme of the utility model, the check valve includes one of mechanical check valve, the one-way closed sleeve pipe of rubber, gravity apron closed check valve, sleeve pipe spheroid check valve or piston gravity stagnant water valve.

In this technical scheme, according to the utility model discloses a check valve of oxygenating gas distribution element's gas access mouth can adopt but not limited to mechanical check valve, the one-way closed sleeve pipe of rubber, gravity apron closed check valve, sleeve pipe spheroid check valve, piston gravity check valve etc. the purpose is when the system stops the air feed, effectively prevents gas and liquid reverse inflow air inlet and gas distribution pipeline.

The oxygen charging and distributing method includes setting the oxygen charging and distributing element inside water body, introducing gas via the gas inlet, and making the gas reach the gas distributing sheet via the gas distributing space and escape via the gas escape port to the peripheral water body.

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

1) the oxygen charging and distributing element of the utility model can form a gas bin which is equivalent to the resistance between the surrounding edge and the air diffusing piece due to the resistance of the tiny holes of the air escape opening, which is helpful for the gas to be evenly distributed at the lower part of the air diffusing piece, and the liquid at the lower part is blocked by the gas bin, is not contacted with the lower side of the air diffusing piece and keeps a certain distance with the lower side of the air diffusing piece, so that the surface of the lower side of the air diffusing piece is kept clean;

2) the utility model greatly simplifies the structure of the oxygen charging and distributing element, eliminates the energy consumption loss of the membrane aeration element for opening expansion through the selection of the thickness of the air diffusing sheet, the number of micro-fine perforations and the perforation size, and avoids the pressure loss caused by the over-micro pores of the ceramic air distributing element and the thickness of the ceramic sheet, thereby reducing the total energy consumption of the aeration and oxygen charging system;

3) compared with the elastic material used for the membrane, the air diffusing piece of the utility model has stronger aging resistance of the solid rigid body material, does not need to stretch and deform, and also improves the overall service life of the oxygen charging and distributing element.

Drawings

Fig. 1 is a schematic cross-sectional view of a conventional membrane gas distribution element.

Fig. 2 is a schematic cross-sectional view of the oxygen distribution member of the present invention.

FIG. 3 is a schematic sectional view of example 2.

Fig. 4 is a top view of the air distribution sheet.

FIG. 5 is a cross-sectional view of an air-dispersing sheet.

In the figure, 1, an air distribution element; 2. a gas supply member; 3. a rigid carrier disc; 4. a flexible membrane; 5. perforating; 11. a gas dispersing tablet; 12. surrounding edges; 13. a gas inlet; 14. a gas escape opening; 15. a check valve.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and between the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, which is all within the scope of the present invention.

Referring to fig. 2, the present invention provides an oxygenating and gas distributing element, which includes at least one gas inlet 13; at least one rigid solid gas diffusion sheet 11, wherein the surface of the gas diffusion sheet 11 is provided with a plurality of gas outlet holes 14; and at least one surrounding edge 12, wherein the surrounding edge 12 and the air dispersing sheet 11 surround to form an air distribution space with enough volume; the gas inlet 13 extends into the gas distribution space, and a check valve 15 is arranged at the end of the gas inlet 13.

Referring to fig. 4, the plurality of gas-escape holes 14 on the surface of the gas diffusion sheet 11 are uniformly arranged in a circular shape.

Referring to fig. 5, the gas escape opening 14 has a larger dimension near the liquid level inside the gas distribution space, and tends to become smaller on the escape passage.

In the present invention, the oxygen distribution aeration element may take various planar geometries such as, but not limited to, a right circular disk, an oval disk or sheet, a square or rectangular or strip-like cylinder, a large rectangular plate with one or more gas inlets, and the like. The depth of the lower surrounding edge can be reasonably adjusted according to the size of the gas escape opening of the gas dissipation sheet and the pressure difference generated by the design of the number of the open holes and the ventilation volume.

The connection mode of the air dispersing sheet and the surrounding edge comprises one of integrated production, welding fixation, bolt fixation, bonding fixation or clamping groove fixation.

The check valve of the gas inlet can be, but is not limited to, a mechanical check valve, a rubber one-way closed sleeve, a gravity cover plate closed check valve, a sleeve ball check valve, a piston type gravity check valve and the like, and aims to effectively prevent gas and liquid from reversely flowing into the gas inlet and the gas distribution pipeline when the system stops supplying gas.

Example 1

Referring to fig. 2 and 4, the oxygen distributing member of the present embodiment includes a gas inlet 13; a rigid solid gas diffusion sheet 11, wherein 3000 and 6000 gas outlet openings 14 with the size of 0.1-0.3mm are arranged on the surface of the gas diffusion sheet 11; and an annular surrounding edge 12, wherein the surrounding edge 12 and the air dispersing sheet 11 surround to form an air distribution space with enough volume; the gas access port 13 extends into the gas distribution space, the whole oxygen charging and gas distribution element is cylindrical, the gas escape ports 14 are circularly and uniformly arranged, and the end part of the gas access port 13 is provided with a check valve.

When the oxygen-charging and gas-distributing element is used, the oxygen-charging and gas-distributing element is placed in a water body, gas is introduced through the gas inlet, passes through the gas-distributing space and reaches the gas-dispersing sheet, and escapes into the peripheral water body through the gas escape outlet on the gas-dispersing sheet.

Example 2

Referring to fig. 3 and 5, the oxygen distributing member of the present embodiment includes a gas inlet 13; a rigid solid gas diffusion sheet 11, wherein 3000 and 6000 gas outlet openings 14 with the size of 0.1-0.3mm are arranged on the surface of the gas diffusion sheet 11; and an annular surrounding edge 12, the surrounding edge 12 and the air dispersing sheet 11 surround to form an air distribution space with enough volume, and the end part of the air inlet 12 is provided with a check valve 15; the gas access port 13 extends into the gas distribution space, the whole oxygen charging and gas distributing element is cylindrical, the gas escape ports 14 are circularly and uniformly arranged, the position of the gas escape ports 14 close to the liquid level inside the gas distribution space is large in size, and the gas escape ports tend to be smaller on an escape channel.

When the oxygen-charging and gas-distributing element is used, the oxygen-charging and gas-distributing element is placed in a water body, gas is introduced through the gas inlet, passes through the gas-distributing space and reaches the gas-dispersing sheet, and escapes into the peripheral water body through the gas escape outlet on the gas-dispersing sheet.

The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the method of the present invention, and such modifications and additions are also considered to be within the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.

Claims (8)

1. An oxygenating gas distribution element, characterized in that the gas distribution element comprises:

at least one gas access port;

at least one rigid solid gas diffusion sheet, wherein the surface of the gas diffusion sheet is provided with a plurality of gas escape ports;

and at least one surrounding edge, wherein the surrounding edge and the air dispersing sheet surround to form an air distribution space with enough volume;

the gas access port extends into the gas distribution space;

and a check valve is arranged on the gas access port.

2. An oxygen distribution member according to claim 1 wherein said diffusing sheet has a thickness of 2-5 mm.

3. An oxygen distributing element as claimed in claim 1, wherein the number of said gas escape openings is 3000-6000, and the size of said gas escape openings is 0.1-0.3 mm.

4. An oxygen distribution oxygenating element according to claim 1 wherein said plurality of gas escape openings are arranged in a circular pattern.

5. An oxygen distribution member according to claim 1, wherein said gas escape opening has a cross section which is tapered outwardly along the gas distribution space.

6. An oxygen charging and distributing element according to claim 1, wherein the cross-section of the distributing element comprises one of a right circular, oval, square, rectangular or strip-like cylindrical shape.

7. An oxygen distribution member according to claim 1 wherein said air diffusing sheet is attached to said peripheral edge by one of integral production, welding, bolting, gluing or snap-fitting.

8. An oxygen aeration and distribution element according to claim 1 wherein said check valve comprises one of a mechanical check valve, a rubber one-way closing sleeve, a gravity cover plate closing check valve, a sleeve ball check valve, or a piston gravity stop valve.

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