CN104667771A - Diaphragm type air dispersing device - Google Patents
Diaphragm type air dispersing device Download PDFInfo
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- CN104667771A CN104667771A CN201510077125.9A CN201510077125A CN104667771A CN 104667771 A CN104667771 A CN 104667771A CN 201510077125 A CN201510077125 A CN 201510077125A CN 104667771 A CN104667771 A CN 104667771A
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- slit
- loose
- air
- pore portion
- air film
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention provides a diaphragm type air dispersing device. When the diaphragm type air dispersing device is used for dispersing air, an air dispersing film (3) is observed from a length direction (A) to be expanded into a hill shape because of the pressure of air supplied to the air dispersing film (3), and an air hole part is opened; a plurality of first air hole parts (8) and second air hole parts (9) are respectively arrayed to be formed in the length direction (A) and width direction (B) of the air dispersing film (3); the first air hole parts (8) are holes formed in the length direction (A) of the air dispersing film (3), and the second air hole parts (9) are holes formed in a direction inclined relative to the length direction (A) of the air dispersing film (3); and the second air hole parts (9) are positioned between the adjacent first air hole parts (8) in at least one of the length direction (A) and the width direction (B).
Description
The application is the divisional application that name is called " Membrane air diffuser ", international filing date is on February 9th, 2011, international application no is PCT/JP2011/052685, national applications number is the application for a patent for invention of 201180045608.0.
Technical field
The present invention relates to the Membrane air diffuser in the groove being arranged at sewer treatment facility etc., relate to the technology of carrying out a biological disposal upon or carrying out to stir loose gas.
Background technology
In the past, in this Membrane air diffuser, such as, there is the device shown in Figure 33 ~ Figure 35.This Membrane air diffuser is provided with OBL loose air film 252 at the upper surface of OBL base plate 251, and is provided with air supply opening 253 in assigned position, is formed with air supply unit 254 between base plate 251 and loose air film 252.Air supply opening 253 is communicated with air supply unit 254.
Loose air film 252 is the components being provided with multiple slit 255 (pore portion) on synthetic resin film or synthetic rubber film, and base plate 251 is fixed in the portion 256 that is fixed of the surrounding of loose air film 252.Each slit 255 is slits elongated on the length direction A of loose air film 252, parallel with above-mentioned length direction A.
As shown in Figure 34 (a), when loose gas stops, loose air film 252 is subject to the hydraulic pressure in groove, becomes the state of the upper surface being pressed against base plate 251.Now, loose air film 252 does not expand, and slit 255 closes.
In addition, during loose gas, compressed air supplies from air supply opening 253 to air supply unit 254, and as shown in Figure 34 (b), loose air film 252 is compressed the pressure of air, observes, expand into chevron shape from length direction A.Like this, when loose air film 252 expands, slit 255 in the width direction B is opened, and the air in air supply unit 254, by slit 255, becomes bubble 258, sprays from the Inside To Outside of loose air film 252.
As described above, about the loose device of air being formed with multiple slit 255 on loose air film 252, such as, the Japanese Unexamined Patent Publication of following patent document 1 is described in.
Patent document 1: Japanese Unexamined Patent Publication 2007-777
Summary of the invention
; for above-mentioned form in the past; as shown in figure 35; if the interval D between each slit 255 on length direction A is set shorter; then when the little air quantity that the air quantity delivered supplied to air supply unit 254 is few;, there is oxygen and move efficiency and reduce such problem in the bubble produced from slit 255 and combining and coarsening from the bubble phase that its adjacent slit 255 produces.
In addition, if bubble coarsening, then the surface area of bubble reduces relative to the ratio of volume, and therefore, gas liquid interfacial area reduces and buoyancy increases, and floating interval of floating dock shortens, and thus, oxygen becomes and is difficult to dissolve, and oxygen moves efficiency to be reduced.
As this countermeasure, general consider by the interval D between above-mentioned each slit 255 being set longlyer suppress bubble combination each other, but in this case, the number of the slit 255 of the unit are of loose air film 252 can reduce.Thus, when making air quantity carry out loose gas with being increased to Wind Volume from above-mentioned little air quantity, the number that there is slit 255 is not enough, and the rising of the initial stage pressure loss and the pressure loss increases such problem.
In addition, during loose gas, as shown in Figure 34 (b), observe from length direction A, when loose air film 252 expand into chevron shape, the tensile force F of width B acts on slit 255, and slit 255 in the width direction B is opened, but as shown in figure 35, due to this tensile force F, produce be full of cracks 257 in the end of slit 255, this be full of cracks 257 propagates into the adjacent slit 255 on length direction A, there is slit 255 adjacent one another are and to be connected such problem via be full of cracks 257.
The object of the invention is to, a kind of Membrane air diffuser is provided, the rising of the initial stage pressure loss and the pressure loss can be suppressed, by making air bubbles dispersion and produce equably when little air quantity, the reduction of efficiency can be moved by anti-block, in addition, the propagation of chapping can be prevented.
To achieve these goals, this 1st invention is a kind of Membrane air diffuser,
Loose air film is formed multiple pore portion,
During loose gas, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, and pore portion opens,
When loose gas stops, loose air film is non-bloating state, and pore portion closes,
Wherein,
On loose air film, arrangement ground forms multiple 1st pore portion and is difficult to than the 1st pore portion the 2nd pore portion that opens respectively,
2nd pore portion is positioned between the 1st adjacent pore portion.
Thus, when loose fate turns, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, produces tensile force at loose air film.This tensile force becomes the power for opening the 1st pore portion and the 2nd pore portion, but now, because the 2nd pore portion is difficult to open compared with the 1st pore portion, so when carrying out loose gas with little air quantity, the 1st pore portion first opens than the 2nd pore portion, is fed into the 1st pore portion of major part by opening of the air of loose air film, become bubble, be ejected from the Inside To Outside of loose air film, in contrast, almost not by being difficult to the 2nd pore portion opened and the bubble be ejected laterally.
Thereby, it is possible to prevent the bubble from the ejection of the 1st pore portion and the bubble incorporation from adjacent the 2nd pore portion of the 1st pore portion.And, because the 2nd pore portion is positioned between the 1st adjacent pore portion, so the 1st interval each other, pore portion is extended, the bubble from the ejection of the 1st pore portion and the bubble incorporation sprayed from the 1st pore portion of the 1st pore portion neighbour can be prevented.Thus, can air bubbles dispersion be made when little air quantity and produce equably, the reduction of efficiency can be moved by anti-block.
In addition, when carrying out loose gas when air quantity is increased to Wind Volume from above-mentioned little air quantity, the more 2nd pore portions of quantity delivered of air become and more easily open, and the number in the 2nd pore portion of ejection bubble more increases.Therefore, the air being fed into loose air film, by the 1st pore portion and the 2nd pore portion, becomes bubble, is ejected from the Inside To Outside of loose air film.Like this, when little air quantity, bubble is mainly from the ejection of the 1st pore portion, but along with air quantity increase, the number in the 2nd pore portion of ejection bubble increases, so can suppress the rising of the initial stage pressure loss and the pressure loss.
The Membrane air diffuser of this 2nd invention, the 1st pore portion is hole long in the prescribed direction of loose air film,
The direction that 1st pore portion opens is consistent with the direction of the tensile force resulting from loose air film when loose air film expand into chevron shape,
2nd pore portion is hole long on the direction tilted relative to the 1st pore portion.
Thus, when loose fate turns, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, produces tensile force at loose air film.This tensile force becomes the power for opening the 1st pore portion and the 2nd pore portion, but now, the direction that 1st pore portion opens is consistent with the direction of tensile force, but the 2nd pore portion tilts relative to the 1st pore portion, so the direction of the direction of opening, the 2nd pore portion and tensile force is inconsistent.Thus, the 2nd pore portion, compared with the 1st pore portion, becomes and is difficult to open.
This 3rd invention is a kind of Membrane air diffuser,
Loose air film is formed multiple pore portion,
During loose gas, due to the pressure of air supplied to loose air film, observe loose air film from length direction and expand into chevron shape, pore portion opens,
When loose gas stops, loose air film is non-bloating state, and pore portion closes,
Wherein,
On the length direction and width of loose air film, arrangement ground forms multiple 1st pore portion and the 2nd pore portion respectively,
1st pore portion is hole long on the length direction of loose air film,
2nd pore portion is hole long on the direction that the length direction relative to loose air film tilts,
2nd pore portion is positioned between the 1st adjacent pore portion.
Thus, when loose fate turns, due to the pressure of air supplied to loose air film, observe loose air film from length direction and expand into chevron shape (namely orthogonal with the length direction of loose air film cross sectional shape expand into chevron shape), produce the tensile force of width at loose air film.This tensile force becomes the power for opening the 1st pore portion and the 2nd pore portion, but now, the direction that 1st pore portion opens is consistent with the direction of tensile force, but the 2nd pore portion tilts relative to length direction, so the direction of the direction of opening, the 2nd pore portion and tensile force is inconsistent.Thus, the 2nd pore portion, compared with the 1st pore portion, becomes and is difficult to open.
Thus, when carrying out loose gas with little air quantity, 1st pore portion first opens than the 2nd pore portion, be fed into the 1st pore portion of major part by opening of the air of loose air film, become bubble, be ejected from the Inside To Outside of loose air film, in contrast, almost not by being difficult to the 2nd pore portion opened and the bubble be ejected laterally.
Thereby, it is possible to prevent the bubble from the ejection of the 1st pore portion and the bubble incorporation from adjacent the 2nd pore portion of the 1st pore portion.And, because the 2nd pore portion is positioned between the 1st adjacent pore portion, so the 1st interval each other, pore portion is extended, the bubble from the ejection of the 1st pore portion and the bubble incorporation sprayed from the 1st pore portion of the 1st pore portion neighbour can be prevented.Thus, when little air quantity, can air bubbles dispersion be made and produce equably, the reduction of efficiency can be moved by anti-block.
In addition, when carrying out loose gas when air quantity is increased to Wind Volume from above-mentioned little air quantity, the more 2nd pore portions of quantity delivered of air become and more easily open, and the number in the 2nd pore portion of ejection bubble more increases.Therefore, the air being fed into loose air film, by the 1st pore portion and the 2nd pore portion, becomes bubble, is ejected from the Inside To Outside of loose air film.Like this, when little air quantity, bubble mainly sprays from the 1st pore portion, but along with air quantity increase, because the number spraying the 2nd pore portion of bubble increases, so can suppress the rising of the initial stage pressure loss and the pressure loss.
This 4th invention is a kind of Membrane air diffuser,
Loose air film is formed multiple pore portion,
During loose gas, due to the pressure of air supplied to loose air film, when loose air film expand into chevron shape, pore portion opens,
When loose gas stops, loose air film is non-bloating state, and pore portion closes,
Wherein,
On loose air film, multiple 1st pore portion and the 2nd air cap are not formed on concentric circles with arranging,
1st pore portion is hole long in the circumference of loose air film,
2nd pore portion is hole long on the direction of the peripheral, oblique relative to loose air film,
2nd pore portion is positioned between the 1st adjacent pore portion.
Thus, when loose fate turns, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, produces tensile force at loose air film.This tensile force becomes the power for opening the 1st pore portion and the 2nd pore portion, but now, the direction that 1st pore portion opens is consistent with the direction of tensile force, but the 2nd pore portion tilts relative to the 1st pore portion, so the direction of the direction of opening, the 2nd pore portion and tensile force is inconsistent.Thus, the 2nd pore portion, compared with the 1st pore portion, becomes and is difficult to open.
Thus, when carrying out loose gas with little air quantity, 1st pore portion first opens than the 2nd pore portion, be fed into the 1st pore portion of major part by opening of the air of loose air film, become bubble, be ejected from the Inside To Outside of loose air film, in contrast, almost not by being difficult to the 2nd pore portion opened and the bubble be ejected laterally.
Thereby, it is possible to prevent the bubble from the ejection of the 1st pore portion and the bubble incorporation from adjacent the 2nd pore portion of the 1st pore portion.And, because the 2nd pore portion is positioned between the 1st adjacent pore portion, so the 1st interval each other, pore portion is extended, the bubble from the ejection of the 1st pore portion and the bubble incorporation sprayed from the 1st pore portion of the 1st pore portion neighbour can be prevented.Thus, can air bubbles dispersion be made when little air quantity and produce equably, the reduction of efficiency can be moved by anti-block.
In addition, when carrying out loose gas when air quantity is increased to Wind Volume from above-mentioned little air quantity, the more 2nd pore portions of quantity delivered of air become and more easily open, and the number in the 2nd pore portion of ejection bubble more increases.Therefore, the air being fed into loose air film, by the 1st pore portion and the 2nd pore portion, becomes bubble, is ejected from the Inside To Outside of loose air film.Like this, when little air quantity, bubble mainly sprays from the 1st pore portion, but along with air quantity increase, because the number spraying the 2nd pore portion of bubble increases, so can suppress the rising of the initial stage pressure loss and the pressure loss.
The Membrane air diffuser of this 5th invention, the 2nd pore portion be relative to the 1st pore portion with the hole that the direction of the angular slope of 5 ° ~ 25 ° is grown.
The Membrane air diffuser of this 6th invention, be adjacent to formation the 3rd pore portion with at least either side on the length direction in the 1st pore portion or the 2nd pore portion, the 3rd pore portion is the hole grown on the direction roughly orthogonal relative to the 1st pore portion.
Thus, during loose gas, when loose air film expand into chevron shape, tensile force acts on the 1st pore portion, and the 1st pore portion opens.Even if produce be full of cracks due to this tensile force in the end in the 1st pore portion, this be full of cracks, when arriving to the 3rd pore portion from the end in the 1st pore portion, also can not forwards be advanced therefrom.Thus, can prevent above-mentioned be full of cracks from propagating into the 1st adjacent pore portion from the 1st pore portion.
In addition, the Membrane air diffuser of this 7th invention, forms multiple 1st pore portion and the 3rd pore portion while loose air film arranges respectively,
During loose gas, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape and the 1st pore portion opens,
When loose gas stops, loose air film is non-bloating state, and the 1st pore portion closes,
3rd pore portion is formed on the position adjacent with at least either side on the length direction in the 1st pore portion,
3rd pore portion is hole long on the direction intersected relative to the 1st pore portion.
Thus, during loose gas, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, and due to the tensile force produced at loose air film, the 1st pore portion opens.The air be supplied to, by the 1st pore portion, becomes bubble, is ejected from the Inside To Outside of loose air film.
Now, due to the hole that the 3rd pore portion is long on the direction intersected relative to the 1st pore portion, even if so produce be full of cracks due to above-mentioned tensile force in the end in the 1st pore portion, when this be full of cracks arrives to the 3rd pore portion from the end in the 1st pore portion, also can not forwards advance therefrom.Thus, can prevent above-mentioned be full of cracks from propagating into the 1st adjacent pore portion from the 1st pore portion.
In addition, when loose gas stops, air is blocked to the supply of loose air film, and loose air film does not expand, and the 1st pore portion and the 2nd pore portion close.
The Membrane air diffuser of this 8th invention, the 3rd pore portion is hole long on the direction roughly orthogonal relative to the 1st pore portion.
Thus, during loose gas, the 1st pore portion opens, and the air be supplied to, by the 1st pore portion, becomes bubble, is ejected from the Inside To Outside of loose air film.
Now, due to the hole that the 3rd pore portion is long on the direction roughly orthogonal relative to the 1st pore portion, even if so produce be full of cracks in the end in the 1st pore portion, this be full of cracks, when arriving to the 3rd pore portion from the end in the 1st pore portion, also can not forwards be advanced therefrom.
In addition, when loose gas, the 3rd pore portion closes, the bubble be not almost ejected laterally by the 3rd pore portion.
The Membrane air diffuser of this 9th invention, forms multiple 1st pore portion and the 3rd pore portion while loose air film arranges respectively,
1st pore portion is hole long on the length direction of loose air film,
3rd pore portion is hole long on the width of loose air film, and is formed on the length direction of loose air film, adjacent with at least either side in the 1st pore portion position,
During loose gas, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, and the 1st pore portion opens in the direction of the width,
When loose gas stops, loose air film is non-bloating state, and the 1st pore portion closes.
Thus, during loose gas, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, and owing to resulting from the tensile force of the width of loose air film, the 1st pore portion opens in the direction of the width.The air be supplied to, by the 1st pore portion, becomes bubble, is ejected from the Inside To Outside of loose air film.
Now, even if because above-mentioned tensile force is in the end generation be full of cracks in the 1st pore portion, this be full of cracks, when arriving to the 3rd pore portion from the end in the 1st pore portion, also can not forwards be advanced therefrom.Thus, can prevent above-mentioned be full of cracks from propagating into the 1st pore portion adjacent the length direction of loose air film from the 1st pore portion.
In addition, when loose gas, the 2nd pore portion closes, the bubble be not almost ejected laterally by the 2nd pore portion.
In addition, when loose gas stops, air is blocked to the supply of loose air film, and loose air film does not expand, and the 1st and the 2nd pore portion closes.
The Membrane air diffuser of this 10th invention, on loose air film, multiple 1st pore portion and the 3rd air cap are not formed on concentric circles with arranging,
1st pore portion is hole long in the circumference of loose air film,
3rd pore portion is hole long in the radial direction of loose air film, and is formed in the circumference of loose air film, adjacent with at least either side in the 1st pore portion position,
During loose gas, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, and the 1st pore portion opens diametrically,
When loose gas stops, loose air film is non-bloating state, and the 1st pore portion closes.
Thus, during loose gas, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, and owing to resulting from the tensile force of the radial direction of loose air film, the 1st pore portion opens diametrically.The air be supplied to, by the 1st pore portion, becomes bubble, is ejected from the Inside To Outside of loose air film.
Now, even if produce be full of cracks due to above-mentioned tensile force in the end in the 1st pore portion, this be full of cracks, when arriving to the 3rd pore portion from the end in the 1st pore portion, also can not forwards be advanced therefrom.Thus, can prevent above-mentioned be full of cracks from propagating into the 1st adjacent pore portion the circumference of loose air film from the 1st pore portion.
In addition, when loose gas, the 3rd pore portion closes, the bubble be not almost ejected laterally by the 3rd pore portion.
In addition, when loose gas stops, air is blocked to the supply of loose air film, and loose air film does not expand, and the 1st pore portion and the 3rd pore portion close.
The Membrane air diffuser of this 11st invention, loose air film is formed multiple relative to the 1st pore portion with the 2nd pore portion that the direction of the angular slope of 5 ° ~ 25 ° is grown.
Thus, when carrying out loose gas with little air quantity, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, and owing to resulting from the tensile force of loose air film, the 1st pore portion first opens than the 2nd pore portion.The air be supplied to, by the 1st pore portion opened, becomes bubble, is ejected from the Inside To Outside of loose air film, in contrast, almost not by being difficult to the 2nd pore portion opened and the bubble be ejected laterally.
In addition, when carrying out loose gas air quantity is increased to Wind Volume from above-mentioned little air quantity, the more 2nd pore portions of quantity delivered of air become and more easily open, and the number in the 2nd pore portion of ejection bubble more increases.Therefore, the air being fed into loose air film, by the 1st pore portion and the 2nd pore portion, becomes bubble, is ejected from the Inside To Outside of loose air film.Like this, when little air quantity, bubble mainly sprays from the 1st pore portion, but along with air quantity increase, because the number spraying the 2nd pore portion of bubble increases, so can suppress the rising of the initial stage pressure loss and the pressure loss.
As mentioned above, according to the present invention, the rising of the initial stage pressure loss and the pressure loss can be suppressed, by making air bubbles dispersion and produce equably when little air quantity, the reduction of efficiency can be moved by anti-block.In addition, the propagation of chapping can be prevented.
Accompanying drawing explanation
Fig. 1 is the stereogram of the Membrane air diffuser of the 1st embodiment of the present invention.
Fig. 2 is the S-S direction view of Fig. 1, represents state when loose fate turns.
Fig. 3 is the top view of the Pareto diagram of the slit representing this Membrane air diffuser.
Fig. 4 is the amplification plan view of the slit of this Membrane air diffuser, and (a) represents that the state that the 1st ~ 3rd slit is closed, (b) represent that the 1st and the 2nd slit is opened and the closed state of the 3rd slit.
Fig. 5 is the amplification view of the 1st and the 2nd slit of this Membrane air diffuser, a () represents the state that the 1st and the 2nd slit is closed, b () represents that the 1st slit is opened and the closed state of the 2nd slit, (c) represents the state that the 1st and the 2nd slit is opened.
Fig. 6 is the figure of the universal relation formula of radius for illustration of the maximum stress of the front end resulting from breach and the front end of breach.
The graphic representation face throughput of Fig. 7 (a) and the relation of the number of foaming slit, the graphic representation face throughput of (b) and the 1st ~ 3rd slit account for the relation of the ratio of all foaming slits.
The diagram of the relation of the ratio of the number of the 2nd slit of the foaming that Fig. 8 is the angle of inclination that represents the 2nd slit when being 100 with the number of the 1st slit making foaming.
Fig. 9 is the comparative example relative to the 1st embodiment, is the top view representing the Pareto diagram arranged randomly in the direction of slit.
Figure 10 is the top view of the Pareto diagram of the slit of the Membrane air diffuser representing the 2nd embodiment of the present invention.
Figure 11 is the top view of the Pareto diagram of the slit of the Membrane air diffuser representing the 3rd embodiment of the present invention.
Figure 12 is the top view of the Pareto diagram of the slit of the Membrane air diffuser representing the 4th embodiment of the present invention.
Figure 13 is the stereogram of the Membrane air diffuser of the 5th embodiment of the present invention.
Figure 14 is the S-S direction view of Figure 13.
Figure 15 is the top view of the Pareto diagram of the slit representing this Membrane air diffuser.
Figure 16 is the top view of the Membrane air diffuser of the 6th embodiment of the present invention.
Figure 17 is the S-S direction view of Figure 16.
Figure 18 is the stereogram of the Membrane air diffuser of the 7th embodiment of the present invention.
Figure 19 is the S-S direction view of Figure 18, represents state when loose fate turns.
Figure 20 is the top view of the Pareto diagram of the slit representing this Membrane air diffuser.
Figure 21 is the amplification plan view of the slit of this Membrane air diffuser, and (a) represents that the state that the 1st and the 3rd slit is closed, (b) represent that the 1st slit is opened and the closed state of the 3rd slit.
Figure 22 is the amplification view of the 1st slit of this Membrane air diffuser, and (a) represents the state that the 1st slit is closed, and (b) represents the state that the 1st slit is opened.
Figure 23 is the figure of the universal relation formula of the radius of front end in order to the maximum stress and breach that the front end resulting from breach is described.
Figure 24 is the top view of the Pareto diagram of the slit of the Membrane air diffuser representing the 8th embodiment of the present invention.
Figure 25 is the amplification plan view of the slit of this Membrane air diffuser, and (a) represents that the state that the 1st ~ 3rd slit is closed, (b) represent that the 1st and the 2nd slit is opened and the closed state of the 3rd slit.
The graphic representation face throughput of Figure 26 (a) and the relation of the number of foaming slit, the graphic representation face throughput of (b) and the 1st ~ 3rd slit account for the relation of the ratio of all foaming slits.
The diagram of the relation of the ratio of the number of the 2nd slit of the foaming that Figure 27 is the angle of inclination that represents the 2nd slit when being 100 with the number of the 1st slit making foaming.
Figure 28 is the stereogram of the Membrane air diffuser of the 9th embodiment of the present invention.
Figure 29 is the S-S direction view of Figure 28.
Figure 30 is the top view of the Pareto diagram of the slit representing this Membrane air diffuser.
Figure 31 is the top view of the Membrane air diffuser of the 10th embodiment of the present invention.
Figure 32 is the S-S direction view of Figure 31.
Figure 33 is the stereogram of Membrane air diffuser in the past.
Figure 34 is the amplification view of the slit of this Membrane air diffuser, and (a) represents the state that slit is closed, and (b) represents the state that slit is opened.
Figure 35 is the top view of the Pareto diagram of the slit representing this Membrane air diffuser.
Detailed description of the invention
First, be described with reference to the 1st ~ 6th embodiment of accompanying drawing to the invention described in claim 1 ~ claim 6.
(the 1st embodiment)
In the 1st embodiment, as shown in Figure 1 and Figure 2, Reference numeral 1 is arranged on the Membrane air diffuser in the aeration tank of sewer treatment facility etc.This Membrane air diffuser 1 has: the OBL base plate 2 be made by plastics or metal etc.; And be installed in the loose air film 3 of oblong-shaped (shape longer in one direction an example) of upper surface of base plate 2.Loose air film 3 has elasticity, such as, be made up of resins such as the rubber such as EPDM, silicon or polyurethane.
Base plate 2 is fixed in the portion 6 (such as riveting component etc.) that is fixed of the surrounding of loose air film 3, is formed with air supply unit 4 between base plate 2 and loose air film 3.In addition, in an end of the length direction A (example of prescribed direction) of loose air film 3, the air supply opening 5 of short tubular is provided with.Air supply opening 5 is communicated with air supply unit 4, and is connected to air supply source (omitting diagram).
In addition, loose air film 3 can use the film of characteristic (1) ~ (3) such as following.
* characteristic (1)
Material: rubber (EPDM), hardness (A): 50 ~ 70, thickness (mm): 1 ~ 3
* characteristic (2)
Material: rubber (silicon), hardness (A): 35 ~ 55, thickness (mm): 1 ~ 3
* characteristic (3)
Material: resin (polyurethane), hardness (A): 70 ~ 98, thickness (mm): 0.3 ~ 1
In addition, the characteristic of above-mentioned loose air film 3 is examples, is not limited thereto, can according to the condition used, and suitable change, becomes optimization.
During loose gas, as shown in the solid line of Fig. 2, owing to being fed into the pressure of the air of loose air film 3, observe from length direction A, loose air film 3 expand into chevron shape.In addition, now, because the two ends of the length direction A of loose air film 3 are fixed in base plate 2, chevron shape can not be become so observe from length direction A, but the most region except the two ends except loose air film 3, because observe loose air film 3 from length direction A to expand into chevron shape, here the two ends of loose air film 3 are considered except nonlocal.
At loose air film 3, be formed with multiple 1st ~ 3rd slit 8 ~ 10 (example in the 1st ~ 3rd pore portion).As shown in Figure 3, Figure 4, the 1st slit 8 is slots (slit) of A along its length, parallel with above-mentioned length direction A.2nd slit 9 is the direction slots (slit) along tilting with the tilt angle alpha specified relative to length direction A (i.e. the 1st slit 8).In addition, in the present embodiment, the tilt angle alpha of regulation is set to 13 ° (acute angles).3rd slit 10 is B slots (slit) in the width direction, orthogonal with above-mentioned length direction A (i.e. the 1st slit 8).
1st ~ 3rd slit 8 ~ 10 is on length direction A and width B, multiple with the Pareto diagram specified arrangement.That is, the 1st slit 8 is formed multiple on length direction A with being separated with predetermined distance, and the 2nd slit 9 is positioned between the 1st slit 8 adjacent on length direction A.And, between the 1st slit 8 that the 3rd slit 10 is adjacent on length direction A and the 2nd slit 9, and be positioned between the 1st slit 8 adjacent on length direction A, thus, adjacent with the 2nd slit 9 with the 1st slit 8.In addition, the 2nd slit 9 is also positioned between the 1st slit 8 adjacent on width B.
Below, the effect of said structure is described.
When loose fate turns, by from air supply source (omit diagram) by air supply opening 5, the air of authorized pressure is supplied to Membrane air diffuser 1, as shown in the solid line of Fig. 2, due to the pressure of air supplied from air supply opening 5 to air supply unit 4, observe from length direction A, loose air film 3 expand into chevron shape, and loose air film 3 produces the tensile force F of width B.
As shown in Figure 4, tensile force F becomes the power for opening the 1st slit 8 and the 2nd slit 9, but now, the direction that 1st slit 8 is opened is consistent with the direction of tensile force F, but relative to this, because the 2nd slit 9 tilts with tilt angle alpha, so the direction of the 2nd slit 9 direction of opening and tensile force F is inconsistent.That is, open relative to the 1st slit 8 power F that is stretched, the 2nd slit 9 is opened by the power F ' of the Fcos α less than tensile force F.Therefore, tilt angle alpha more increases, and the 2nd slit 9, compared with the 1st slit 8, is more difficult to open.
Thus, when carrying out loose gas with little air quantity, as shown in Fig. 5 (b), 1st slit 8 is first opened compared with the 2nd slit 9, the major part being supplied to the air of air supply unit 4, by the 1st slit 8 opened, becomes bubble 13, is ejected from the Inside To Outside of loose air film 3, in contrast, almost not by being difficult to the 2nd slit 9 opened and being ejected bubble laterally.
Thereby, it is possible to prevent the bubble that sprays from the 1st slit 8 and the bubble incorporation from adjacent the 2nd slit 9 of the 1st slit 8.In addition, as shown in Figure 3, because the 2nd slit 9 is positioned between the 1st adjacent slit 8, so the 1st slit 8 interval D is each other extended, the bubble sprayed from the 1st slit 8 and the bubble incorporation sprayed from the 1st slit 8 of the 1st slit 8 neighbour can be prevented.Thus, can air bubbles dispersion be made when little air quantity and produce equably, the reduction of efficiency can be moved by anti-block.
In addition, when carrying out loose gas when air quantity is increased to Wind Volume from above-mentioned little air quantity, the quantity delivered to the air of air supply unit 4 supply is more, and the air pressure of air supply unit 4 more rises, 2nd slit 9 is more easily opened, and the number of the 2nd slit 9 of ejection bubble more increases.Therefore, as shown in Fig. 5 (c), the air of air supply unit 4, by the 1st slit 8 and the 2nd slit 9, becomes bubble 13, is ejected from the Inside To Outside of loose air film 3.Like this, when little air quantity, bubble 13 mainly sprays from the 1st slit 8, but along with air quantity increase, the number of the 2nd slit 9 of ejection bubble 13 increases, so can suppress the rising of the initial stage pressure loss and the pressure loss.
In addition, during loose gas, as shown in Fig. 4 (b), the tensile force F of width B acts on the 1st slit 8 and the 1st slit 8 is opened, even if but the end of the 1st slit 8 produces be full of cracks 12 due to this tensile force F, this be full of cracks 12, when reaching the 3rd slit 10 from the end of the 1st slit 8, also can not forwards be advanced therefrom.Thus, can prevent above-mentioned be full of cracks 12 from propagating into the 1st slit 8 adjacent length direction A from the 1st slit 8.
In addition, as a reference, below the reason that the propagation of chapping 112 is as described above prevented from is described in advance.That is, as shown in Figure 6, generally speaking, mean stress б is being applied to the component 16 being formed with breach 15
0when, the maximum stress б of the front end generation of breach 15
maxrepresented by following formula.
[formula 1]
According to above-mentioned formula, the radius ρ of the front end of breach 15 is less, maximum stress б
maxmore increase.When be full of cracks 12, because the radius ρ on above-mentioned top is very little, so concentrate due to stress, be full of cracks 12 gradually grows up.Here, as shown in Figure 4, because the length direction of above-mentioned 3rd slit 10 is consistent with the direction of tensile force F, so the 3rd slit 10 can be counted as the very large breach of radius ρ of above-mentioned front end.Therefore, the maximum stress б obtained by above-mentioned formula
maxbecome very little, stress is concentrated and is produced hardly at the 3rd slit 10, thereby, it is possible to prevent be full of cracks 12 from propagating at the 3rd slit 10.
In addition, when loose gas, the loose air film 3 expanding into chevron shape mainly produces the tensile force F of width B, and the power of length direction A produces hardly, so the 3rd slit 10 becomes closed state, the air almost externally do not sprayed from air supply unit 4 by the 3rd slit 10.
In addition, when loose gas stops, air is blocked to the supply of loose air film 3, and as shown in the imaginary line of Fig. 2 and Fig. 5 (a), loose air film 3 is subject to the state that hydraulic pressure becomes the upper surface being pressed against base plate 2.Now, loose air film 3 does not expand, and the 1st ~ 3rd slit 8 ~ 10 closes.
In addition, the diagram of Fig. 7 is an example of the measurement data of the foaming slit number according to air quantity, wherein, the graphic representation face throughput of Fig. 7 (a) and the relation of the number of foaming slit, the graphic representation face throughput of Fig. 7 (b) and the 1st ~ 3rd slit 8 ~ 10 account for the relation of the ratio of all foaming slits.
In addition, in the diagram of Fig. 7 (a), so-called face throughput, represents every 1 hour and every 1m
2by the throughput of the air of loose air film 3, from face throughput M1 to face throughput M4, increasing.In addition, the air quantity supplied to Membrane air diffuser 1 is fewer, and face throughput also more reduces, and air quantity more multimembrane face throughput also more increases.
In addition, the number of so-called foaming slit, be represent the 1st slit 8 having sprayed bubble from 100 the 1st slits 8 number, from 100 the 2nd slit 9, sprayed the number of the 2nd slit 9 of bubble and from 100 the 3rd slits 10, sprayed the number of the 3rd slit 10 of bubble.
In addition, in the diagram of Fig. 7 (b), so-called ratio shared in all foaming slits is in total number of the foaming slit for each face throughput M1 ~ M4 represented in the diagram of Fig. 7 (a), shared by the 1st ~ 3rd slit 8 ~ 10 ratio.In addition, loose air film 3 is now made by polyurethane resin (hardness 85A), and thickness is 0.6mm, and in addition, the length of the 1st ~ 3rd slit 8 ~ 10 is about 0.4mm.
According to the diagram of Fig. 7, when carrying out loose gas with little air quantity (such as face throughput M1), the major part of bubble produces from the 1st slit 8, almost not from the bubble that the 2nd slit 9 produces.In addition, even if when little air quantity and Wind Volume, also not from the bubble that the 3rd slit 10 produces.In addition, with air quantity increase correspondingly, the 2nd slit 9 account for all foaming slits ratio increase.
In addition, Fig. 8 is the tilt angle alpha of the 2nd slit 9 when representing that the air quantity supplied to Membrane air diffuser 1 is 2 vertical liters/min and the diagram of the relation of the ratio of the number of the 2nd slit 9 foamed when making the number of the 1st slit 8 of foaming be 100.Such as, when tilt angle alpha is 13 °, the ratio of the 2nd slit 9 of foaming is about 58%.Now, if the number of the 1st slit 8 of ejection (foaming) air is 24, then the number spraying the 2nd slit 9 of (foaming) air is 14 (=24 × 0.58).
In addition, based on Fig. 8 diagram shown in relation, the tilt angle alpha of the 2nd slit 9 is set as 13 ° of optimum value, but is not limited to 13 °, in the scope of preferably 5 ° ~ 25 °, the angle of more preferably 10 ° ~ 15 °.
In addition, as a comparison case, Fig. 9 represents an example of the loose air film 3 arranged randomly in the direction of slit 18.In this case, less relative to the tilt angle alpha of length direction A, slit 15 becomes more easily to be opened, but tails off, so there is the pressure loss to increase such problem due to the ratio of the little slit 15 of above-mentioned tilt angle alpha.In addition, during loose gas, if the slit of sludge foaming 15 produces blocking, then air foams from the slit 15 that tilt angle alpha is larger, and therefore, the rising that also there is the pressure loss becomes problem so greatly.
In above-mentioned 1st embodiment, as shown in Figure 4, the 3rd slit 10 is formed as the most effective angle of 90 ° relative to length direction A, but also can be formed as the angle in the scope of about 70 ° ~ 110 °.
(the 2nd embodiment)
In above-mentioned 1st embodiment, be formed with the 3rd slit 10 at loose air film 3, but as the 2nd embodiment, as shown in Figure 10, also can not form the 3rd slit 10.
(the 3rd embodiment)
As the 3rd embodiment, as shown in figure 11, also two kind of the 2nd slit 9,11 (example in the 2nd pore portion) with different tilt angle alpha can be formed between the 1st slit 8 adjacent on length direction A.Here, the tilt angle alpha of the 2nd slit 9 of a side is set to 13 °, and the tilt angle alpha of the 2nd slit 11 of the opposing party is set to 6 °.
Thus, the 2nd slit 9 of a side is difficult to open compared with the 2nd slit 11 of the opposing party, and the 2nd slit 11 of the opposing party is difficult to open compared with the 1st slit 8.Thus, when carrying out loose gas with little air quantity, the 1st slit 8 to the 2 slit 9,11 is first opened, and the major part being supplied to the air of air supply unit 4 is ejected by the 1st slit 8 opened.In addition, when carrying out loose gas when air quantity is increased to Wind Volume from above-mentioned little air quantity, 2nd slit 11 of the ensuing the opposing party of the 1st slit 8 becomes easily to be opened, the number of the 2nd slit 11 of the opposing party of ejection bubble increases, afterwards, if air quantity increases further, then the 2nd slit 9 of a side also becomes and easily opens, and the number of the 2nd slit 9 of a side of ejection bubble increases.
In above-mentioned 3rd embodiment, the tilt angle alpha of the 2nd slit 11 of the opposing party is set as 6 °, but is not limited to 6 °, also can be set as the angle in the scope of 5 ° ~ 20 °.
(the 4th embodiment)
In above-mentioned 1st embodiment, the 2nd slit 9 is formed between the 1st slit 8 adjacent on length direction A, but as the 4th embodiment, as shown in figure 12, also can form the 2nd slit 9 between the 1st slit 8 adjacent on width B, and the slit arranged on length direction A is all unified into identical kind.
(the 5th embodiment)
In above-mentioned 1st ~ 4th embodiment, as shown in Figure 1, the shape making base plate 2 and loose air film 3 is rectangle, but is not limited to rectangle, as the 5th embodiment, as shown in Figure 13 ~ Figure 15, the shape of base plate 2 and loose air film 3 also can be made for circular.
That is, the air supply opening 5 of short tube shape is located at the central part of base plate 2, and the upper end of air supply opening 5 is communicated with air supply unit 4, and the lower end of air supply opening 5 is connected with air supply pipe 21 and is communicated with.During loose gas, as shown in the solid line of Figure 14, due to the pressure of the air to loose air film 3 supply, observe from radial R, loose air film 3 expand into chevron shape.
Multiple 1st ~ 3rd slit 8 ~ 10 (example in the 1st ~ 3rd pore portion) is formed at loose air film 3.As shown in figure 15, the 1st slit 8 is slots (slit) on the circumferencial direction C of loose air film 3.2nd slit 9 is slots (slit) on the direction tilted with the tilt angle alpha specified relative to circumferencial direction C (i.e. the 1st slit 8).In addition, the tilt angle alpha of regulation is set to 13 ° (acute angles).3rd slit 10 is slots (slit) on the radial R of loose air film 3, orthogonal with above-mentioned circumferencial direction C.
1st ~ 3rd slit 8 ~ 10 arranges multiple with the Pareto diagram of regulation on concentric circles.That is, the 1st slit 8 is formed multiple on circumferencial direction C with being separated with predetermined distance, and the 2nd slit 9 is positioned between the 1st slit 8 adjacent on circumferencial direction C.And, between the 1st slit 8 that the 3rd slit 10 is adjacent on circumferencial direction C and the 2nd slit 9, and be positioned between the 1st slit 8 adjacent on circumferencial direction C.
Below, the effect of said structure is described.
When loose fate turns, by the air of authorized pressure being supplied to Membrane air diffuser 1 from air supply pipe 21 by air supply opening 5, as shown in the solid line of Figure 14, the pressure of the air that cause supplies from air supply opening 5 to air supply unit 4, observe loose air film 3 from radial R and expand into chevron shape, loose air film 3 produces the tensile force F of radial R.
Tensile force F becomes the power for opening the 1st slit 8 and the 2nd slit 9, now, the direction that the 1st slit 8 is opened is consistent with the direction of tensile force F, but relative to this, because the 2nd slit 9 tilts with tilt angle alpha, so the direction of the 2nd slit 9 direction of opening and tensile force F is inconsistent.Thus, tilt angle alpha more increases, and the 2nd slit 9 is more difficult to open compared with the 1st slit 8.
Thus, when carrying out loose gas with little air quantity, 1st slit 8 to the 2 slit 9 is first opened, be supplied to 1st slit 8 of major part by opening of the air of air supply unit 4, become bubble, be ejected from the Inside To Outside of loose air film 3, in contrast, almost not by being difficult to the 2nd slit 9 opened and the bubble be ejected laterally.
In addition, when carrying out loose gas when air quantity is increased to Wind Volume from above-mentioned little air quantity, the quantity delivered to the air of air supply unit 4 supply is more, and the air pressure of air supply unit 4 more rises, 2nd slit 9 becomes more easily to be opened, and the number of the 2nd slit 9 of ejection bubble more increases.Therefore, the air of air supply unit 4, by the 1st slit 8 and the 2nd slit 9, becomes bubble, is ejected from the Inside To Outside of loose air film 3.
In addition, during loose gas, the tensile force F of radial R acts on the 1st slit 8,1st slit 8 is opened, but even if because of this tensile force F, produces be full of cracks 12 in the end of the 1st slit 8, when this be full of cracks 12 arrives to the 3rd slit 10 from the end of the 1st slit 8, also can not forwards advance therefrom.Thus, can prevent above-mentioned be full of cracks 12 from propagating into the 1st slit 8 adjacent circumferencial direction C from the 1st slit 8.
In addition, during loose gas, the main tensile force F producing radial R on the loose air film 3 expanding into chevron shape, the power of circumferencial direction C does not almost produce, so the 3rd slit 10 becomes closed state, the air be not almost externally ejected from air supply unit 4 by the 3rd slit 10.
In addition, when loose gas stops, as shown in the imaginary line of Figure 14, loose air film 3 is subject to hydraulic pressure, becomes the state of the upper surface being pressed against base plate 2.Now, loose air film 3 does not expand, and the 1st ~ 3rd slit 8 ~ 10 closes.
In the 5th embodiment, make the shape of base plate 2 and loose air film 3 for circular, but also can be formed as the regular polygons such as square.
(the 6th embodiment)
In above-mentioned 1st ~ 5th embodiment, Membrane air diffuser 1 is provided with loose air film 3 at the upper surface of base plate 2, but as the 6th embodiment, as shown in Figure 16, Figure 17, also OBL loose air film 3 can be set at the upper surface of OBL pocket 25.Pocket 25 is made up of the flat member of stuffiness, and inside has air supply unit 4.Air supply opening 5 is provided with in the outer rim of the side of pocket 25.Air supply opening 5 is communicated with air supply unit 4, and is connected to air supply source (omitting diagram).
Loose air film 3 is installed in the loose gas opening portion 26 of the upper surface being formed at pocket 25, covers loose gas opening portion 26.Identically with above-mentioned 1st embodiment, loose air film 3 is formed with multiple 1st ~ 3rd slit 8 ~ 10.During loose gas, as shown in the solid line of Figure 17, due to the pressure from air supply opening 5 to the air of air supply unit 4 supply in pocket 25, observe loose air film 3 from length direction A and expand into chevron shape.
Thus, the action effect same with above-mentioned 1st embodiment is obtained.
In above-mentioned 6th embodiment, make pocket 25 and loose air film 3 be oblong-shaped, but also can be toroidal.
In above-mentioned 1st ~ 6th embodiment, by the 1st slit 8 referred to as X, by the 2nd slit 9 of a side referred to as Y, by the 2nd slit 11 of the opposing party referred to as Y ', when by the 3rd slit 10 referred to as Z, in above-mentioned 1st embodiment, as shown in Figure 3, the Pareto diagram of the slit of length direction A is set as " XZYZXZYZX ", in addition, in above-mentioned 5th embodiment, as shown in figure 15, the Pareto diagram of the slit of circumferencial direction C is set as " XZYZXZYZX ", but be not limited to this Pareto diagram, such as also can be set as Pareto diagram (1) ~ (4) as following.
Pattern (1): XYXYXYX
Pattern (2): XXYXXYXXYX
Pattern (3): XYY ' XYY ' XYY ' X
Pattern (4): XYXY ' XYXY ' X
In addition, in Fig. 1 ~ Figure 17, in order to easy understand, each slit 8 ~ 11 is depicted with expanding than actual exaggeration, but in fact, each slit 8 ~ 11 is small sizes, such as, the length of each slit 8 ~ 11 is preferably set to the scope of 0.2mm ~ 1mm, is more preferably the scope being set to 0.4mm ~ 0.6mm.
In addition, the number of the reality of each slit 8 ~ 11 is than many in Fig. 1 ~ number depicted in figure 17.In addition, the 1st slit 8 and the 2nd slit 9 both can be identical length, or also can be different length.
In above-mentioned 1st ~ 6th embodiment, make the direction that the 1st slit 8 becomes parallel relative to length direction A, but the 1st slit 8 also can be made to tilt slightly relative to length direction A.In this case, as long as the angle of inclination of the 2nd slit 9 is set be greater than the angle of inclination of the 1st slit 8, just can the 2nd slit 9 be set be difficult to open than the 1st slit 8.Such as, consider to make the 1st slit 8 tilt 3 ° relative to length direction A, and the 2nd slit 9 to be tilted 15 ° of such embodiments etc. relative to length direction A.In addition, these angles of inclination can according to the loose material of air film 3, the length of slit and suitable to regulate.
In above-mentioned 1st ~ 6th embodiment, by giving angle between the 1st slit 8 and the 2nd slit 9, make the 2nd slit 9 to the 1 slit 8 be difficult to open, but by making the length of the 2nd slit 9 shorter than the length of the 1st slit 8, also can the 2nd slit 9 be set be difficult to open than the 1st slit 8.Such as, by being 0.6mm by the length setting of the 1st slit 8, be 0.4mm by the length setting of the 2nd slit 9, the 2nd slit 9 is set and is difficult to open than the 1st slit 8.
In above-mentioned 1st ~ 6th embodiment, make the shape of loose air film 3 be oblong-shaped or toroidal, but except these shapes, also can be elliptical shape, two ends are formed as the oblong shape, L shape, square shape, diamond shaped etc. of arc-shaped.
Then, the 7th ~ 10th embodiment of the invention described in claim 7 ~ claim 11 is described with reference to accompanying drawing.
(the 7th embodiment)
In the 7th embodiment, as shown in Figure 18, Figure 19, Reference numeral 101 is arranged on the Membrane air diffuser in the aeration tank of sewer treatment facility etc.This Membrane air diffuser 101 has: the OBL base plate 102 be made by plastics or metal etc.; And be installed in the OBL loose air film 103 of upper surface of base plate 102.Loose air film 103 has elasticity, such as, be made up of resins such as the rubber such as EPDM, silicon or polyurethane.
Base plate 102 is fixed in the portion 106 (such as riveting component etc.) that is fixed of the surrounding of loose air film 103, is formed with air supply unit 104 between base plate 102 and loose air film 103.In addition, in an end of the length direction A of loose air film 103, the air supply opening 105 of short tubular is provided with.Air supply opening 105 is communicated with air supply unit 104, and is connected to air supply source (omitting diagram).
In addition, loose air film 103 can use the film of characteristic (1) ~ (3) such as following.
* characteristic (1)
Material: rubber (EPDM), hardness (A): 50 ~ 70, thickness (mm): 1 ~ 3
* characteristic (2)
Material: rubber (silicon), hardness (A): 35 ~ 55, thickness (mm): 1 ~ 3
* characteristic (3)
Material: resin (polyurethane), hardness (A): 70 ~ 98, thickness (mm): 0.3 ~ 1
In addition, the characteristic of above-mentioned loose air film 103 is examples, is not limited thereto, can according to the condition used, and suitable change, becomes optimization.
During loose gas, as shown in the solid line of Figure 19, owing to being fed into the pressure of the air of loose air film 103, observe from length direction A, loose air film 103 expand into chevron shape.In addition, now, because the two ends of the length direction A of loose air film 103 are fixed in base plate 102, chevron shape can not be become so observe from length direction A, but the most region except the two ends except loose air film 103, because observe loose air film 103 from length direction A to expand into chevron shape, here the two ends of loose air film 103 are considered except nonlocal.
At loose air film 103, be formed with the multiple 1st and the 3rd slit 108,109 (example in the 1st and the 3rd pore portion).As shown in Figure 20, Figure 21, the 1st slit 108 is slots (slit) of A along its length, parallel with above-mentioned length direction A.3rd slit 109 is B slots (slit) in the width direction, orthogonal with above-mentioned length direction A.
1st and the 3rd slit 108,109 is on length direction A and width B, multiple with the Pareto diagram specified arrangement.That is, the 1st slit 108 is formed multiple on length direction A with being separated with predetermined distance, and the 3rd slit 109 is positioned at (example of the position adjacent with at least either side of the 1st slit 108) between the 1st slit 8 adjacent on length direction A.In addition, the 1st slit 108 is formed multiple on width B, with being also separated with predetermined distance, and the 3rd slit 109 is also positioned between the 1st slit 8 adjacent on width B.
Below, the effect of said structure is described.
When loose fate turns, by from air supply source (omit diagram) by air supply opening 105, the air of authorized pressure is supplied to Membrane air diffuser 101, as shown in the solid line of Figure 19, due to the pressure of air supplied from air supply opening 105 to air supply unit 104, observe from length direction A, loose air film 103 expand into chevron shape, loose air film 103 produces the tensile force F of width B, as shown in Figure 21 (b), Figure 22, due to this tensile force F, the 1st slit 108 in the width direction B is opened.The air being fed into air supply unit 104, by the 1st slit 108, becomes bubble 113, is ejected from the Inside To Outside of loose air film 103.
Now, as shown in Figure 21 (b), even if produce be full of cracks 112 due to above-mentioned tensile force F in the end of the 1st slit 108, when this be full of cracks 112 arrives to the 3rd slit 109 from the end of the 1st slit 108, also can not forwards advance therefrom.Thus, can prevent above-mentioned be full of cracks 112 from propagating into the 1st slit 108 adjacent length direction A from the 1st slit 108.
In addition, as a reference, below the reason that the propagation of chapping 112 is as described above prevented from is described in advance.That is, as shown in figure 23, generally speaking, mean stress б is being applied to the component 116 being formed with breach 115
0when, the maximum stress б of the front end generation of breach 115
maxrepresented by following formula.
[formula 1]
According to above-mentioned formula, the radius ρ of the front end of breach 115 is less, maximum stress б
maxmore increase.When be full of cracks 112, because the radius ρ on above-mentioned top is very little, so concentrate due to stress, be full of cracks 112 gradually grows up.Here, as shown in figure 20, because the length direction of above-mentioned 3rd slit 109 is consistent with the direction of tensile force F, so the 3rd slit 109 can be counted as the very large breach of radius ρ of above-mentioned front end.Therefore, the maximum stress б obtained by above-mentioned formula
maxbecome very little, stress is concentrated and is produced hardly at the 3rd slit 109, thereby, it is possible to prevent be full of cracks 112 from propagating at the 3rd slit 109.
In addition, when loose gas, the loose air film 103 expanding into chevron shape mainly produces the tensile force F of width B, the power of length direction A produces hardly, so as shown in Figure 21 (b), 3rd slit 109 becomes closed state, the air almost externally do not sprayed from air supply unit 104 by the 3rd slit 109.
In addition, when loose gas stops, air is blocked to the supply of loose air film 103, and as shown in Figure 22 (a), loose air film 103 is subject to the state that hydraulic pressure becomes the upper surface being pressed against base plate 102.Now, loose air film 103 does not expand, and the 1st and the 3rd slit 108,109 closes.
(the 8th embodiment)
In the 8th embodiment, as shown in Figure 24, Figure 25, on loose air film 103, except the above-mentioned 1st and the 3rd slit 108,109, be also formed multiple as the 2nd slit 110 (example in the 2nd pore portion) along the direction slot tilted with the tilt angle alpha of regulation relative to length direction A.In addition, the tilt angle alpha of regulation is set to 13 ° (acute angles).2nd slit 110 is positioned between the 1st slit 108 adjacent on length direction A.In addition, between the 1st slit 108 that the 3rd slit 109 is adjacent on length direction A and the 2nd slit 110, and be positioned between the 1st slit 108 adjacent on length direction A.
Below, the effect of said structure is described.
When loose fate turns, the tensile force F of the width B that the loose air film 103 expanding into chevron shape produces becomes the power for opening the 1st slit 108 and the 2nd slit 110, now, the direction that 1st slit 108 is opened is consistent with the direction of tensile force F, but relative to this, because the 2nd slit 110 tilts with tilt angle alpha, so the direction of the 2nd slit 110 direction of opening and tensile force F is inconsistent.That is, opened by tensile force F relative to the 1st slit 108, the 2nd slit 110 is opened by power F ' that is less than tensile force F, Fcos α.Therefore, tilt angle alpha more increases, and the 2nd slit 110 becomes and is more difficult to open compared with the 1st slit 108.
Thus, when carrying out loose gas with little air quantity, be fed into 1st slit 108 of major part by opening of the air of air supply unit 104, become bubble, be ejected from the Inside To Outside of loose air film 103, in contrast, almost not by being difficult to the 2nd slit 110 opened and the bubble be ejected laterally.
Thereby, it is possible to prevent the bubble that sprays from the 1st slit 108 and the bubble incorporation from adjacent the 2nd slit 110 of the 1st slit 108.And, because the 2nd slit 110 is positioned between the 1st adjacent slit 108, so the 1st slit 108 interval D is each other extended, the bubble sprayed from the 1st slit 108 and the bubble incorporation sprayed from the 1st slit 108 of the 1st slit 108 neighbour can be prevented.Thus, when little air quantity, can air bubbles dispersion be made and produce equably, the reduction of efficiency can be moved by anti-block.
In addition, when carrying out loose gas when air quantity is increased to Wind Volume from above-mentioned little air quantity, quantity delivered to the air of air supply unit 104 supply is more, the air pressure of air supply unit 104 more rises, 2nd slit 110 becomes more easily to be opened, and the number of the 2nd slit 110 of ejection bubble more increases.Therefore, the air of air supply unit 104, by the 1st slit 108 and the 2nd slit 110, becomes bubble, is ejected from the Inside To Outside of loose air film 103.Like this, when with little air quantity, bubble mainly sprays from the 1st slit 108, but along with air quantity increase, because the number spraying the 2nd slit 110 of bubble increases, so can suppress the rising of the initial stage pressure loss and the initial stage pressure loss.
In addition, the diagram of Figure 26 is an example of the measurement data of the foaming slit number according to air quantity, wherein, the graphic representation face throughput of Figure 26 (a) and the relation of the number of foaming slit, the graphic representation face throughput of Figure 26 (b) and the 1st ~ 3rd slit 108 ~ 110 account for the relation of the ratio of all foaming slits.
In addition, in the diagram of Figure 26 (a), so-called face throughput, represents every 1 hour and every 1m
2by the throughput of the air of loose air film 103, from face throughput M1 to face throughput M4, increasing.In addition, the air quantity supplied to Membrane air diffuser 101 is fewer, and face throughput also more reduces, and air quantity more multimembrane face throughput also more increases.
In addition, the number of so-called foaming slit, be represent the 1st slit 108 having sprayed bubble from 100 the 1st slits 108 number, from 100 the 3rd slit 109, sprayed the number of the 3rd slit 109 of bubble and from 100 the 2nd slits 110, sprayed the number of the 2nd slit 110 of bubble.
In addition, in the diagram of Figure 26 (b), so-called ratio shared in all foaming slits is in total number of the foaming slit for each face throughput M1 ~ M4 represented in the diagram of Figure 26 (a), shared by the 1st ~ 3rd slit 108 ~ 110 ratio.In addition, loose air film 103 is now made by polyurethane resin (hardness 85A), and thickness is 0.6mm, and in addition, the length of the 1st ~ 3rd slit 108 ~ 110 is about 0.4mm.
According to the diagram of Figure 26, when carrying out loose gas with little air quantity (such as face throughput M1), the major part of bubble produces from the 1st slit 108, almost not from the bubble that the 2nd slit 110 produces.In addition, even if when little air quantity and Wind Volume, also not from the bubble that the 3rd slit 109 produces.In addition, with air quantity increase correspondingly, the 2nd slit 110 account for all foaming slits ratio increase.
In addition, Figure 27 is the tilt angle alpha of the 2nd slit 110 when representing that the air quantity supplied to Membrane air diffuser 101 is 2 vertical liters/min and the diagram of the relation of the ratio of the number of the 2nd slit 110 foamed when making the number of the 1st slit 8 of foaming be 100.Such as, when tilt angle alpha is 13 °, the ratio of the 2nd slit 110 of foaming is about 58%.Now, if the number of the 1st slit 108 of ejection (foaming) air is 24, then the number spraying the 2nd slit 110 of (foaming) air is 14 (=24 × 0.58).
In addition, based on Figure 27 diagram shown in relation, the tilt angle alpha of the 2nd slit 110 is set as 13 ° of optimum value, but is not limited to 13 °, in the scope of preferably 5 ° ~ 25 °, the angle of more preferably 10 ° ~ 15 °.
In the above-mentioned 7th and the 8th embodiment, the 3rd slit 109 is formed as the angle of 90 ° the most effective relative to length direction A, but also can be formed as the angle in the scope of about 70 ° ~ 110 °.
In the above-mentioned 7th and the 8th embodiment, the 1st slit 108 is formed as parallel relative to length direction A, but it also can be made to tilt a little relative to length direction A.
(the 9th embodiment)
In the above-mentioned 7th and the 8th embodiment, the shape making base plate 102 and loose air film 103 is rectangle, but is not limited to rectangle, as the 9th embodiment, as shown in Figure 28 ~ Figure 30, the shape of base plate 102 and loose air film 103 also can be made for circular.
That is, the air supply opening 105 of short tube shape is located at the central part of base plate 102, and the upper end of air supply opening 105 is communicated with air supply unit 104, and the lower end of air supply opening 105 is connected with air supply pipe 121 and is communicated with.
During loose gas, as shown in the solid line of Figure 29, due to the pressure of the air to loose air film 103 supply, observe loose air film 103 from radial R and expand in chevron shape.At loose air film 103, the multiple 1st and the 3rd slit 108,109 is formed on concentric circles.As shown in figure 30, the 1st slit 108 is the circumferencial direction C slots (slit) along loose air film 103.3rd slit 109 is the radial R slots (slit) along loose air film 103, and orthogonal with above-mentioned circumferencial direction C.
1st and the 3rd slit 108,109 is on circumferencial direction C and radial R, multiple with the Pareto diagram specified arrangement.That is, the 1st slit 108 is formed multiple on circumferencial direction C with being separated with predetermined distance, and the 3rd slit 109 is positioned at (example of the position adjacent with at least either side of the 1st slit 108) between the 1st slit 108 adjacent on circumferencial direction C.
Below, the effect of said structure is described.
When loose fate turns, as shown in the solid line of Figure 29, owing to passing through the pressure of the air that air supply opening 105 supplies to air supply unit 104 from air supply pipe 121, observe loose air film 103 from radial R and expand into chevron shape, the tensile force F of radial R is produced at loose air film 103, due to this tensile force F, the 1st slit 108 radially R is opened.The air being fed into air supply unit 104, by the 1st slit 108, becomes bubble, is ejected from the Inside To Outside of loose air film 103.
Now, as shown in figure 30, even if due to above-mentioned tensile force F, produce be full of cracks 112 in the end of the 1st slit 108, when this be full of cracks 112 arrives to the 3rd slit 109 from the end of the 1st slit 108, also can not forwards advance therefrom.Thus, can prevent above-mentioned be full of cracks 112 from propagating into the 1st slit 108 adjacent circumferencial direction C from the 1st slit 108.
In addition, when loose gas, mainly produce the tensile force F of radial R at the loose air film 103 expanding into chevron shape, the power of circumferencial direction C produces hardly, so the 3rd slit 109 becomes closed state, the air almost externally do not sprayed from air supply unit 104 by the 3rd slit 109.
In addition, when loose gas stops, air is blocked to the supply of loose air film 103, and loose air film 103 is subject to hydraulic pressure, becomes the state of the upper surface being pressed against base plate 102.Now, loose air film 103 does not expand, and the 1st and the 3rd slit 108,109 closes.
In above-mentioned 9th embodiment, loose air film 103 is formed with the 1st and the 3rd slit 108,109, but also can forms 1st ~ 3rd slit 108 ~ 110 same with above-mentioned 8th embodiment on the loose air film 103 of toroidal.In this case, also identically with above-mentioned 8th embodiment, when little air quantity, can air bubbles dispersion be made and produce equably, the reduction of efficiency can be moved by anti-block, and, the rising of the initial stage pressure loss and the initial stage pressure loss can be suppressed.
In addition, in above-mentioned 9th embodiment, make the shape of base plate 102 and loose air film 103 for circular, but also can be formed as the regular polygons such as square.
(the 10th embodiment)
In above-mentioned 7th ~ 9th embodiment, Membrane air diffuser 101 is provided with loose air film 103 at the upper surface of base plate 102, but as the 10th embodiment, as shown in Figure 31, Figure 32, also OBL loose air film 103 can be set at the upper surface of OBL pocket 125.Pocket 125 is made up of the flat member of stuffiness, and inside has air supply unit 104.Air supply opening 105 is provided with in the outer rim of the side of pocket 125.Air supply opening 105 is communicated with air supply unit 104, and is connected to air supply source (omitting diagram).
Loose air film 103 is installed in the loose gas opening portion 126 of the upper surface being formed at pocket 125, covers loose gas opening portion 126.Identically with above-mentioned 7th embodiment, loose air film 103 is formed with the 1st and the 3rd slit 108,109.During loose gas, as shown in the solid line of Figure 32, due to the pressure from air supply opening 105 to the air of air supply unit 104 supply in pocket 125, observe loose air film 103 from length direction A and expand into chevron shape.
Thus, the action effect same with above-mentioned 7th embodiment is obtained.
In above-mentioned 10th embodiment, make pocket 125 and loose air film 103 be oblong-shaped, but also can be toroidal.In addition, also 1st ~ 3rd slit 108 ~ 110 same with above-mentioned 8th embodiment can be formed on loose air film 103.
In addition, in Figure 18 ~ Figure 32, in order to easy understand, each slit 108 ~ 110 is depicted with expanding than actual exaggeration, but in fact, each slit 108 ~ 110 is small sizes, such as, the length of each slit 108 ~ 110 is preferably set to the scope of 0.2mm ~ 1mm, is more preferably the scope being set to 0.4mm ~ 0.6mm.
In addition, the number of the reality of each slit 108 ~ 110 is more than the number described in Figure 18 ~ Figure 32.In addition, the 1st slit 108 and the 3rd slit 109 both can be identical length, or also can be different length.
In above-mentioned 7th ~ 10th embodiment, make the shape of loose air film 103 be oblong-shaped or toroidal, but except these shapes, also can be elliptical shape, two ends are formed as the oblong shape, L shape, square shape, diamond shaped etc. of arc-shaped.
Claims (5)
1. a Membrane air diffuser, is characterized in that,
Loose air film forms multiple 1st pore portion and the 3rd pore portion with arranging respectively,
During loose gas, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape and the 1st pore portion opens,
When loose gas stops, loose air film is non-bloating state, and the 1st pore portion closes,
3rd pore portion is formed on the position adjacent with at least either side on the length direction in the 1st pore portion,
3rd pore portion is hole long on the direction intersected relative to the 1st pore portion.
2. Membrane air diffuser according to claim 1, is characterized in that,
3rd pore portion is hole long on the direction roughly orthogonal relative to the 1st pore portion.
3. a Membrane air diffuser, is characterized in that,
Loose air film forms multiple 1st pore portion and the 3rd pore portion with arranging respectively,
1st pore portion is hole long on the length direction of loose air film,
3rd pore portion is hole long on the width of loose air film, and is formed on the length direction of loose air film, adjacent with at least either side in the 1st pore portion position,
During loose gas, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, and the 1st pore portion opens in the direction of the width,
When loose gas stops, loose air film is non-bloating state, and the 1st pore portion closes.
4. a Membrane air diffuser, is characterized in that,
On loose air film, multiple 1st pore portion and the 3rd air cap are not formed on concentric circles with arranging,
1st pore portion is hole long in the circumference of loose air film,
3rd pore portion is hole long in the radial direction of loose air film, and is formed in the circumference of loose air film, adjacent with at least either side in the 1st pore portion position,
During loose gas, due to the pressure of air supplied to loose air film, loose air film expand into chevron shape, and the 1st pore portion opens diametrically,
When loose gas stops, loose air film is non-bloating state, and the 1st pore portion closes.
5. the Membrane air diffuser according to any one of Claims 1 to 4, is characterized in that,
Loose air film is formed multiple relative to the 1st pore portion with the 2nd pore portion long on the direction of the angular slope of 5 ° ~ 25 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510077125.9A CN104667771B (en) | 2011-02-09 | 2011-02-09 | Diaphragm type air dispersing device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510077125.9A CN104667771B (en) | 2011-02-09 | 2011-02-09 | Diaphragm type air dispersing device |
| CN201180045608.0A CN103118991B (en) | 2011-02-09 | 2011-02-09 | Membrane air diffuser |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180045608.0A Division CN103118991B (en) | 2011-02-09 | 2011-02-09 | Membrane air diffuser |
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| CN104667771A true CN104667771A (en) | 2015-06-03 |
| CN104667771B CN104667771B (en) | 2017-04-12 |
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| CN201510077125.9A Expired - Fee Related CN104667771B (en) | 2011-02-09 | 2011-02-09 | Diaphragm type air dispersing device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2399383Y (en) * | 1999-12-11 | 2000-10-04 | 江苏鹏鹞集团有限公司 | Improved diaphragm millipore aerator |
| JP2001246394A (en) * | 2000-03-06 | 2001-09-11 | Suido Kiko Kaisha Ltd | Elevation device of diffuser body in aeration tank |
| JP2004313938A (en) * | 2003-04-16 | 2004-11-11 | Kobelco Eco-Solutions Co Ltd | Clogging prevention operation method of air diffuser |
| CN2905774Y (en) * | 2006-04-21 | 2007-05-30 | 宜兴市裕隆环保有限公司 | Disc type diaphragm microporous aeration equipment |
| CN101870517A (en) * | 2009-04-24 | 2010-10-27 | 得利满水处理系统(北京)有限公司 | Air diffuser for biological aerated filter |
| JP2010274233A (en) * | 2009-06-01 | 2010-12-09 | Kubota Corp | Membrane type air diffusion apparatus |
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2011
- 2011-02-09 CN CN201510077125.9A patent/CN104667771B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2399383Y (en) * | 1999-12-11 | 2000-10-04 | 江苏鹏鹞集团有限公司 | Improved diaphragm millipore aerator |
| JP2001246394A (en) * | 2000-03-06 | 2001-09-11 | Suido Kiko Kaisha Ltd | Elevation device of diffuser body in aeration tank |
| JP2004313938A (en) * | 2003-04-16 | 2004-11-11 | Kobelco Eco-Solutions Co Ltd | Clogging prevention operation method of air diffuser |
| CN2905774Y (en) * | 2006-04-21 | 2007-05-30 | 宜兴市裕隆环保有限公司 | Disc type diaphragm microporous aeration equipment |
| CN101870517A (en) * | 2009-04-24 | 2010-10-27 | 得利满水处理系统(北京)有限公司 | Air diffuser for biological aerated filter |
| JP2010274233A (en) * | 2009-06-01 | 2010-12-09 | Kubota Corp | Membrane type air diffusion apparatus |
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| CN104667771B (en) | 2017-04-12 |
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