CN113072174B - Anti-backflow perforation aerator - Google Patents
Anti-backflow perforation aerator Download PDFInfo
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- CN113072174B CN113072174B CN202110211849.3A CN202110211849A CN113072174B CN 113072174 B CN113072174 B CN 113072174B CN 202110211849 A CN202110211849 A CN 202110211849A CN 113072174 B CN113072174 B CN 113072174B
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- 238000005276 aerator Methods 0.000 title claims abstract description 60
- 238000005273 aeration Methods 0.000 claims abstract description 166
- 239000001301 oxygen Substances 0.000 claims abstract description 113
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 113
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 111
- 238000003756 stirring Methods 0.000 claims abstract description 77
- 210000004907 gland Anatomy 0.000 claims abstract description 11
- 239000012528 membrane Substances 0.000 claims description 64
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract description 15
- 230000001976 improved effect Effects 0.000 abstract description 3
- 230000006978 adaptation Effects 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 21
- 239000010802 sludge Substances 0.000 description 13
- 238000012546 transfer Methods 0.000 description 11
- 229910052593 corundum Inorganic materials 0.000 description 9
- 239000010431 corundum Substances 0.000 description 9
- -1 polyethylene Polymers 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 7
- 229920000573 polyethylene Polymers 0.000 description 7
- 239000010865 sewage Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention relates to the technical field of environmental protection equipment, and discloses a backflow prevention perforation aerator, which comprises: the air inlet pipe, clamping device, oxygen suppliment aeration diaphragm, prevent flowing backward rubber diaphragm, locking ring, gland, oxygen suppliment aeration diaphragm is ring shape and is provided with the oxygen suppliment aeration hole of equidistant range on the anchor ring, the bottom of air inlet pipe is provided with the boss, the inner ring clamp of oxygen suppliment aeration diaphragm is located between clamping device and the boss, prevent flowing backward rubber diaphragm set up in the below of oxygen suppliment aeration diaphragm and be provided with the recess with boss looks adaptation, oxygen suppliment aeration diaphragm and the outer loop butt of preventing flowing backward rubber diaphragm, and equal fixation clamp locates between locking ring and the gland. The oxygen supply and stirring functions of the invention can not only work independently, but also work cooperatively, and the oxygen supply power efficiency and stability are greatly improved.
Description
Technical Field
The invention relates to the technical field of environment-friendly equipment, in particular to an anti-backflow perforated aerator.
Background
Aeration is the main production process link for treating wastewater by an activated sludge method, and aims to realize oxygen supply to bacteria and stirring of sludge. In the aeration link, most sewage treatment plants adopt a blast aeration mode, an aeration device is a core component of a blast aeration system, and at present, the most common blast aeration device is a microporous aerator.
Microporous aerators have a variety of classification modes, which can be divided into the following materials: ceramics (corundum), rubber diaphragms, polyethylene, and the like; the structure form can be divided into: plate, disc, and tube, etc. The following can be classified according to whether the hole can be closed when the gas is stopped: perforated aerators and closed-cell aerators. The microporous aerator in various forms has the following main technical defects:
firstly, the functions of oxygen supply and stirring are not distinguished, namely, the oxygen supply and the stirring are simultaneously carried out by the same part of the aeration device. The following disadvantages arise:
1) oxygen supply and stirring are carried out simultaneously and are completed by the same part of the aeration device, so that the practical application of the aerator with higher oxygen transfer rate is limited, and the development of energy-saving and consumption-reducing work is not facilitated. Because, when the air feed volume reduces along with the improvement of aerator oxygen transfer rate, the stirring ability of aerator will descend, when the stirring effect does not reach standard, the mud phenomenon will appear sinking in good oxygen pond, the time has long still can form the consolidation layer at the bottom of the pool, at this moment, giving vent to anger of aerator will receive the influence, the resistance of giving vent to anger will be higher and higher, it is more and more difficult to give vent to anger, in the long term, will cause the serious dirt of aerator to block up, unable normal work even. In addition, when the sludge is seriously settled, the tank capacity is also reduced, and the production capacity is influenced.
2) The requirements of oxygen supply and stirring on the gas outlet state (such as initial speed, bubble size and the like) are different and even sometimes opposite, theoretically, the smaller the bubble, the lower the initial speed of the gas leaving the surface of the aeration device, the higher the proportion of the bubbles absorbed in the process of rising to the water surface, and the higher the oxygen transfer rate; and larger bubbles and higher initial speed are more favorable for supporting and impacting the sludge, thereby obtaining better stirring effect.
3) Different aeration types (plate, disc and tube), and different stirring effects. The air outlet directions of the disc type and the plate type are vertical and upward, the stirring effect is basically reflected above the plate or the disc, although the effect of the impeller is achieved, the stirring effect is not good in a large number of areas between the plate and the plate (or between the disc and the disc), and the stirring effect is not better achieved below the plate (or the disc). Compared with the prior art, the stirring effect of the tubular aerator is much better, and the tubular aerator gives out air in the circumferential direction, so that the stirring problem among the pipes and in the area below the pipes is effectively solved.
4) When the water quality change amplitude is large, the requirements of oxygen supply and stirring are changed in different proportions, the requirement change of the oxygen supply is large frequently, and the requirement change of the stirring is small frequently, so that the stirring effect cannot meet the requirement when the requirement of the small oxygen supply is met, and at the moment, only the air supply amount can be increased to ensure the stirring effect, so that the aeration power consumption is increased; if the gas is supplied according to the oxygen supply requirement, the stirring effect cannot reach the standard, and the problems of sludge deposition, blockage of an aerator and the like are caused.
Secondly, energy conservation and consumption reduction are the focus targets of all enterprises, and from this perspective, the oxygenation power efficiency of the aerator needs to be improved, specifically:
1) the rubber membrane micro-porous aerator has the advantages of low opening quantity, large air outlet aperture, low oxygen transfer rate, high air outlet resistance, low oxygen transfer rate, low oxygen output power efficiency and high air outlet resistance, and the direct influence of high aeration power consumption.
2) The perforation aerators such as corundum and polyethylene give vent to anger aperture is little, and is in large quantity, theoretically, the oxygen transfer rate of this type of aerator should be higher, but because the trompil form leads to the overall arrangement in the hole of this type of aerator to be disorderly, the interval undersize in hole and hole, cause bubble and bubble fusion, it is inhomogeneous to cause to give vent to anger, the bubble of coming out is not all the microbubble, and then the oxygen transfer rate of this type of aerator has been influenced, so, in practical application, but compare with the obturator aerator of rubber membrane, the oxygen transfer rate of the perforation aerators of materials such as corundum and polyethylene does not have apparent improvement. Compared with a rubber film microporous aerator, the perforated aerator made of corundum, polypropylene and the like is lower in air outlet resistance. Combining the two factors, the aeration power efficiency of the corundum and polyethylene perforated aerator is slightly higher than that of the rubber mold microporous aerator.
And thirdly, continuous operation is ensured, production stop loss is reduced, and for the aeration device, pollution blockage is mainly avoided, or the pollution blockage period is mainly prolonged, and production stop maintenance is often required when the pollution blockage is serious. In addition, get rid of manufacturing and installation defect, most aerators are because the back suppress the pressure and damage of dirt stifled back, specifically are:
1) the perforated aerators such as corundum and polypropylene have the technical defect that sewage flows back to enter the aeration device after air is cut off, so that the aeration device is easy to generate internal blockage.
2) And because the sewage contains a large amount of inorganic matters, organic matters and microorganisms, the external blockage is the problem that materials such as ceramics (corundum), rubber membranes, polyethylene and the like cannot avoid.
3) And the air outlet resistance is increased due to blockage, so that the aeration power consumption is improved.
4) And the blockage causes the air outlet resistance to be increased, the damage probability of wearing parts of the aeration device is increased, and the rubber membrane micropore aerator is easy to tear because the rubber aeration membrane is densely distributed with small holes and the strength of the rubber is not high. Once the aeration device is damaged, the maintenance difficulty is very high due to the fact that the aeration device works at the bottom of water, and production halt is often needed for maintenance.
Disclosure of Invention
The invention aims to provide a backflow-preventing perforated aerator.
In order to achieve the above purpose, the invention adopts the following contents:
a backflow-preventing perforated aerator comprises an air inlet pipe, a clamping device, oxygen supply aeration membranes, backflow-preventing rubber membranes, a locking ring and a pressing cover, wherein the oxygen supply aeration membranes are circular, oxygen supply aeration holes which are arranged at equal intervals are formed in the annular surfaces of the oxygen supply aeration membranes, bosses are arranged at the bottoms of the air inlet pipes, the inner rings of the oxygen supply aeration membranes are clamped between the clamping device and the bosses, the backflow-preventing rubber membranes are arranged below the oxygen supply aeration membranes and provided with grooves matched with the bosses, the oxygen supply aeration membranes are abutted against the outer rings of the backflow-preventing rubber membranes, and the backflow-preventing rubber membranes are fixedly clamped between the locking ring and the pressing cover, when the air inlet pipe is not ventilated, the backflow-preventing rubber membranes are not deformed, and the grooves are sleeved on the bosses; when the air inlet pipe is ventilated, the air rushes out the groove, enters the variable oxygen supply air distribution cavity formed after the anti-backflow rubber diaphragm deforms, and is discharged from the oxygen supply aeration hole in the oxygen supply aeration diaphragm.
Preferably, the stirring aeration base is in threaded connection with the inner side of the locking ring, a containing cavity is arranged in the stirring aeration base, stirring aeration holes in different directions are formed in the bottom of the containing cavity, and an air inlet pipeline is arranged on the stirring aeration base and communicated with the containing cavity.
Preferably, the aperture of the stirring aeration hole is in millimeter level.
Preferably, a gasket is arranged at the joint of the inner ring of the oxygen supply aeration membrane and the boss, and/or the joint of the outer ring of the oxygen supply aeration membrane and the gland, and/or the joint of the stirring aeration base and the bottom of the locking ring.
Preferably, the pore diameter of the oxygen supply aeration hole is in micron order.
Preferably, the oxygen supply aeration membrane is made of composite materials.
Preferably, the outer ring of the oxygen supply aeration membrane is provided with a clamping ring a, the outer ring of the backflow prevention rubber membrane is provided with a clamping ring b, the top of the clamping ring is provided with a clamping groove, and the clamping ring a and the clamping ring b are sequentially clamped in the clamping groove from outside to inside.
Preferably, the clamping device comprises a compression nut, an internal thread is arranged on the inner side of the compression nut, and an external thread matched with the internal thread is arranged on the outer portion of the air inlet pipe.
Preferably, a pressure plate is arranged between the compression nut and the oxygen supply aeration membrane.
Preferably, the pressure cover is provided with a lantern ring, and the lantern ring is sleeved on the air inlet pipe and is in threaded connection with the air inlet pipe.
The invention has the following advantages:
1. the invention can improve the oxygen transfer rate of the oxygen supply aeration membrane without considering the stirring problem, and is beneficial to the development of energy saving and consumption reduction work;
2. the oxygen supply aeration membrane has the characteristics of more holes, uniform distribution and small (micron-sized) aperture, is favorable for realizing higher oxygen transfer rate, and simultaneously can obtain better oxygenation power efficiency because of low air outlet resistance due to the perforation aeration mode, thereby reducing the aeration power consumption;
3. the stirring aeration base has the characteristics of large air outlet aperture, small quantity and horizontal or downward water inlet angle, theoretically, larger air bubbles and higher initial speed can be obtained, and the stirring aeration base is favorable for supporting and impacting sludge, thereby obtaining better stirring effect;
4. although the invention belongs to a disc or plate type aeration type, because the stirring aeration base is independently arranged, the effect which is the same as the air outlet of the pipe type aerator in the circumferential direction is generated, the diameter of the air bubbles is larger, the initial speed is higher, the stirring problem between the aerator and the area below the aerator is solved, and the stirring effect is better;
5. when the water quality has large variation amplitude, aeration schemes such as aeration air quantity, aeration duration and the like can be set according to the requirements of oxygen supply and stirring respectively, so that the problem of difficulty in meeting the requirements of the oxygen supply and the stirring is solved effectively;
6. the variable air distribution cavity is formed by the built-in anti-backflow rubber membrane, so that the oxygen supply aeration membrane is in a perforation form but cannot have the defect of sewage backflow, the internal blockage of the aeration device is avoided, and the variable air distribution cavity has positive effects on ensuring continuous operation and reducing production stop loss;
7. the aeration part of the invention does not adopt materials such as ceramics (corundum), rubber and polyethylene, but uses composite materials which are not easy to adhere, thereby reducing the probability of external blockage, avoiding the external blockage of the aeration device, or prolonging the pollution blockage period of the aeration device. Meanwhile, because the material of the aeration part is not rubber, the defect that the aeration part is torn is basically avoided. In addition, the built-in anti-backflow rubber diaphragm is not easy to tear because of no hole. The characteristics also have positive effects on ensuring continuous operation and reducing production stop loss.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a sectional view showing the overall structure of a back-flow prevention perforated aerator according to the present invention;
FIG. 2 is a cross-sectional view of the overall structure of a backflow prevention perforated aerator of the present invention in operation;
FIG. 3 is a schematic structural view of an air inlet pipe in the back-flow prevention perforated aerator according to the present invention;
FIG. 4 is a schematic structural view of an oxygen supply aeration membrane in a back-flow prevention perforated aerator according to the present invention;
FIG. 5 is a top view of an oxygen aeration membrane in a back-flow prevention aeration apparatus according to the present invention;
FIG. 6 is a cross-sectional view taken along line AA of FIG. 5;
FIG. 7 is a schematic structural view of a backflow prevention rubber diaphragm in the backflow prevention perforated aerator of the present invention;
FIG. 8 is a schematic structural view of a gland in the backflow prevention perforated aerator of the present invention;
FIG. 9 is a top view of a gland in a back-flow prevention perforated aerator of the present invention;
FIG. 10 is a schematic view of a stirring aeration base in an anti-back-flow perforation aerator according to the present invention;
FIG. 11 is a schematic structural view of a stirring aeration base in a back-flow prevention perforated aerator according to the present invention;
FIG. 12 is a top view of a stirring aeration base in a back-flow prevention perforated aerator according to the present invention;
fig. 13 is a cross-sectional view taken along line AA in fig. 12.
In the figures, the various reference numbers are:
1-air inlet pipe, 101-boss, 2-gland, 201-lantern ring, 3-oxygen supply aeration membrane, 301-oxygen supply aeration hole, 302-clamping ring a, 4-backflow prevention rubber membrane, 401-variable oxygen supply distribution air cavity, 402-clamping ring b, 403-groove, 5-clamping ring, 501-clamping groove, 6-stirring aeration base, 601-stirring aeration hole, 602-air inlet pipeline a, 603-air inlet pipeline b, 604-containing cavity, 7-gland nut, 8-pressure plate, 9-gasket a, 10-gasket b, 11-gasket c.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 13, the present invention realizes the oxygen supply function of the aeration apparatus by the oxygen supply aeration membrane 3 fixed on the air inlet pipe 1 and having a plurality of uniformly distributed micron-sized oxygen supply aeration holes 301.
Specifically, the oxygen supply aeration membrane 3 is in a perforated aeration form, i.e. the oxygen supply aeration holes 301 are in an unclosed structure, and unlike the corundum and polyethylene aeration membranes, the oxygen supply aeration membrane 3 has an evenly distributed opening form, i.e. the hole pitch is completely the same, so as to solve the problems of uneven bubble size and bubble fusion.
Specifically, the inner ring of the circular oxygen supply aeration membrane 3 and the outer part of the air inlet pipe 1 are provided with external threads matched with the internal threads of the compression nut 7, the circular oxygen supply aeration membrane 3 is fixed on the air inlet pipe 1 through the pressure plate 8 and the compression nut 7, and a gasket 9 is arranged between the lower part of the inner ring of the oxygen supply aeration membrane 3 and the upper part of the boss 101 at the lower part of the air supply pipe 1 in order to ensure the sealing effect. The middle of gland 2 is provided with lantern ring 201, and lantern ring 201 cover is located on intake pipe 1, and with even 1 threaded connection of trachea, makes gland 2 and intake pipe 1 link to each other through lantern ring 201.
Meanwhile, a clamping ring a302 is arranged at the outer ring of the oxygen supply aeration membrane 3, a clamping ring b402 is arranged at the outer ring of the backflow-preventing rubber membrane 4, a clamping groove 501 is formed in the top of the clamping ring 5, the clamping ring a302 and the clamping ring b402 are sequentially clamped in the clamping groove 5 from outside to inside, the backflow-preventing rubber membrane is arranged below the oxygen supply aeration membrane, the backflow-preventing rubber membrane 3 and the outer ring of the oxygen supply aeration membrane 4 are fixed on the gland 2 through the clamping ring 5, the backflow-preventing rubber membrane 3 is provided with a groove 403 matched with the boss 101, and in order to guarantee the sealing effect, a gasket 10 is arranged between the lower part of the outer ring of the oxygen supply aeration membrane 3 and the gland 2. Different from the oxygen supply aeration membrane 3, the backflow prevention rubber membrane 4 is a circular rubber plate with an open hole on the upper surface.
During operation, after air gets into aeration equipment through intake pipe 1, the air enters into at first and prevents flowing backward between rubber diaphragm 4 and the oxygen suppliment aeration diaphragm 3, at this moment, under the effect of pipeline pressure, prevent flowing backward rubber diaphragm 4 downwards expansion, and then form variable oxygen suppliment cloth air cavity 401 between two-layer diaphragm, as shown in figure 2, air in variable oxygen suppliment cloth air cavity 401 passes through oxygen suppliment aeration hole 301 on oxygen suppliment aeration diaphragm 3, pass oxygen suppliment aeration diaphragm 3 after being cut into the multistrand, under the effect of oxygen suppliment aeration diaphragm 3 surface attraction, the multistrand air current forms a plurality of small bubbles, small bubble does not break away from the surface of oxygen suppliment aeration diaphragm 3 this moment, but along with the bubble crescent, when buoyancy is greater than surface attraction, the bubble just breaks away from the surface of oxygen suppliment aeration diaphragm 3, enter into the aquatic, for the bacterium oxygen suppliment.
When the stop work, the air stops the input, at this moment, the pressure in the intake pipe 1 descends until the ordinary pressure state, at this in-process, prevent flowing backward rubber diaphragm 4 at the pressure difference, under the effect of self elasticity, resume the normal position, recess 403 registrates on boss 101, plug up the lower extreme export of intake pipe 1, and simultaneously, prevent flowing backward rubber diaphragm 4 and the laminating of oxygen suppliment aeration diaphragm 3 together, prevent that sewage from flowing backward and entering into between preventing flowing backward rubber diaphragm 4 and the oxygen suppliment aeration diaphragm 3, just also prevented sewage from entering into in the variable oxygen suppliment cloth air cavity 401, thereby the phenomenon of stifled in the oxygen suppliment aeration diaphragm 3 has been avoided.
Further, a stirring aeration base 6 with stirring aeration holes 601 in different directions is installed below the pressing cover 2.
Specifically, be provided with in stirring aeration base 6 and hold chamber 604, hold the stirring aeration hole 601 that has a plurality of different angles of intaking on the bottom circumference of chamber 604, different with oxygen suppliment aeration hole 301, stirring aeration hole 601 is millimeter-scale aperture, and the quantity is less, more importantly, the angle of intaking of these apertures also is different with oxygen suppliment aeration hole 301, promptly, not ascending direction, but the orientation of descending, decline and level. Meanwhile, an air inlet pipeline a602 and an air inlet pipeline b603 are preset on two sides of the stirring aeration base 6 respectively, and the air inlet pipeline a602 and the air inlet pipeline b603 are communicated with the accommodating cavity 604, so that the function of supplying air independently for the stirring aeration base 6 is realized.
Specifically, the stirring aeration base 6 is connected with the gland 2 through the locking ring 5, and in order to ensure the sealing effect, a gasket 11 is arranged between the stirring aeration base 6 and the locking ring 2.
During operation, air firstly enters the stirring aeration base 6 through the air inlet pipeline a602 and the air inlet pipeline b603, and then the air is cut through the stirring aeration holes 601 and then injected into water to play a role in stirring sludge.
The working process of the invention is as follows:
firstly, in a sewage treatment plant adopting blast aeration, air is supplied by all fans (roots fans, centrifugal fans and other various forms), and the air reaches a biochemical pool through an air main pipe. Different from the original aeration type, after the air reaches the biochemical pool, the air is not supplied through one pipeline, but is divided into two pipelines, wherein one pipeline is connected to the air inlet pipe 1, the other pipeline is connected to the air inlet pipeline a602 and the air inlet pipeline b603, namely, one pipeline supplies the oxygen supply aeration membrane 3, the other pipeline supplies the stirring aeration base 6, and the two pipelines are respectively provided with a valve, wherein the valve for controlling the oxygen supply pipeline is called as an oxygen supply aeration valve, and the valve for controlling the stirring pipeline is called as a stirring aeration valve.
For the continuous aeration process, the oxygen supply aeration valve is normally opened, the specific air inflow is determined according to the dissolved oxygen index at the tail end, and the oxygen supply aeration valve is used for adjusting. Unlike the conventional aeration apparatus (oxygen supply and stirring are not separated), the stirring aeration valve is opened intermittently, for example, 1 time for 1 hour and 5 minutes for one time, and specifically, the opening frequency and the opening time of the stirring aeration valve are determined according to the change of the sludge concentration and whether sludge is generated. In general, when the stirring aeration valve is opened, it is not necessary to increase the amount of air, because the stirring aeration holes 601 have large apertures and the oxygen supply aeration holes 301 have small apertures, a large amount of air is blown out from the stirring aeration holes 601, and a small amount of air is supplied for a short time for aeration, and the stirring aeration itself has the function of supplying oxygen, but the oxygen transfer rate is low. If the stirring effect generated by the mode of not additionally increasing the air quantity is not enough, the oxygen supply aeration valve can be reduced while the stirring aeration valve is opened. If the mode is not enough, the power of the fan can be increased in a short time when the stirring aeration valve is opened, and the air inflow is increased.
For intermittent aeration, the oxygen supply aeration valve and the stirring aeration valve can be opened at the same time when a working period begins, and after working for 5 minutes, the stirring aeration valve is closed, specifically, the time for opening the stirring aeration valve is also determined according to the change of the sludge concentration and whether sludge is generated.
To the liftable structure, before mentioning the aerator, open stirring aeration valve, can conveniently mention the aerator more, solve the problem that the aerator can't or difficult mention because of the sludge blanket is thick of the liftable structure in the past. When the aerator sinks again, the stirring aeration valve can be opened, so that the problem that the previous lifting structure cannot sink in place or is difficult to sink in place due to the thick sludge layer is solved.
It should be apparent that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the present invention, and other variations or modifications can be made on the basis of the above description by those skilled in the art, which is not exhaustive by the embodiments, and the obvious variations or modifications are within the scope of the present invention.
Claims (9)
1. A backflow-preventing perforated aerator is characterized by comprising an air inlet pipe, a clamping device, an oxygen supply aeration membrane, a backflow-preventing rubber membrane, a locking ring, a pressing cover and a stirring aeration base, wherein the oxygen supply aeration membrane is annular, oxygen supply aeration holes which are arranged at equal intervals are formed in the annular surface of the oxygen supply aeration membrane, a boss is arranged at the bottom of the air inlet pipe, an inner ring of the oxygen supply aeration membrane is clamped between the clamping device and the boss, the backflow-preventing rubber membrane is arranged below the oxygen supply aeration membrane and provided with a groove matched with the boss, the oxygen supply aeration membrane is abutted to an outer ring of the backflow-preventing rubber membrane and fixedly clamped between the locking ring and the pressing cover, when the air inlet pipe is not ventilated, the backflow-preventing rubber membrane is not deformed, and the groove is sleeved on the boss; when the air inlet pipe is ventilated, gas rushes out the groove, enters the variable oxygen supply air distribution cavity formed after the anti-backflow rubber diaphragm deforms, and is discharged through the oxygen supply aeration holes in the oxygen supply aeration diaphragm, the stirring aeration base is in threaded connection with the inner side of the locking ring, a containing cavity is arranged in the stirring aeration base, stirring aeration holes in different directions are formed in the bottom of the containing cavity, an air inlet pipeline is arranged on the stirring aeration base, and the air inlet pipeline is communicated with the containing cavity.
2. The anti-backflow perforation aerator according to claim 1, wherein the diameter of the stirring aeration holes is in the millimeter level.
3. The anti-backflow perforated aerator according to claim 1, wherein a gasket is arranged at the joint of the inner ring of the oxygen supply aeration membrane and the boss, and/or the joint of the outer ring of the oxygen supply aeration membrane and the gland, and/or the joint of the stirring aeration base and the bottom of the locking ring.
4. The anti-backflow perforation aerator according to claim 1, wherein the diameter of the oxygen supply aeration holes is micron-sized.
5. The anti-backflow perforated aerator according to claim 1, wherein the oxygen supply aeration membrane is made of a composite material.
6. The anti-backflow perforated aerator according to claim 1, wherein a clamping ring a is arranged at the outer ring of the oxygen supply aeration membrane, a clamping ring b is arranged at the outer ring of the anti-backflow rubber membrane, a clamping groove is formed in the top of the clamping ring, and the clamping ring a and the clamping ring b are sequentially clamped in the clamping groove from outside to inside.
7. The anti-backflow perforation aerator according to claim 1, wherein the clamping device comprises a compression nut, an inner side of the compression nut is provided with an inner thread, and an outer part of the air inlet pipe is provided with an outer thread matched with the inner thread.
8. The anti-backflow perforation aerator according to claim 7, wherein a pressure plate is arranged between the compression nut and the oxygen supply aeration membrane.
9. The anti-backflow perforated aerator according to any one of claims 1 to 8, wherein a collar is arranged on the pressure cover, and the collar is sleeved on the air inlet pipe and is in threaded connection with the air inlet pipe.
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| CN202110211849.3A CN113072174B (en) | 2021-02-25 | 2021-02-25 | Anti-backflow perforation aerator |
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| CN202110211849.3A CN113072174B (en) | 2021-02-25 | 2021-02-25 | Anti-backflow perforation aerator |
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| CN113072174B true CN113072174B (en) | 2022-09-13 |
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| CN113072174A (en) | 2021-07-06 |
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