CN108483628A - Jet aerator with strong volume energy-absorbing power - Google Patents
Jet aerator with strong volume energy-absorbing power Download PDFInfo
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- CN108483628A CN108483628A CN201810611108.2A CN201810611108A CN108483628A CN 108483628 A CN108483628 A CN 108483628A CN 201810611108 A CN201810611108 A CN 201810611108A CN 108483628 A CN108483628 A CN 108483628A
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- 238000005276 aerator Methods 0.000 title claims abstract description 72
- 239000007921 spray Substances 0.000 claims abstract description 45
- 230000008676 import Effects 0.000 claims abstract description 43
- 238000002347 injection Methods 0.000 claims abstract description 16
- 239000007924 injection Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 19
- 239000007789 gas Substances 0.000 description 19
- 239000001301 oxygen Substances 0.000 description 19
- 229910052760 oxygen Inorganic materials 0.000 description 19
- 238000012546 transfer Methods 0.000 description 12
- 238000005273 aeration Methods 0.000 description 10
- 239000012530 fluid Substances 0.000 description 10
- 239000010865 sewage Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
-
- 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)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention discloses a kind of jet aerators with strong volume energy-absorbing power, including suction chamber, spray chamber and mixing chamber, the top of the suction chamber to be equipped with injection medium entrance, inlet and outlet is equipped on opposite both sides side wall;The spray chamber includes import and nozzle, and nozzle is stretched into from the entrance of suction chamber in suction chamber;The outlet of the mixing chamber and the suction chamber, and import, outlet and import, the outlet of the suction chamber of the mixing chamber are coaxial, it further include a groove gap formula nozzle, the outlet of the groove gap formula nozzle and the mixing chamber, and the import of the groove gap formula nozzle, with the import of the mixing chamber, outlet it is coaxial;The outlet of the groove gap formula nozzle is that the groove gap formula of platypelloid type exports;Improve the volume energy-absorbing power of jet aerator.
Description
Technical field
The present invention relates to jet aerators, specifically, being related to a kind of jet aerator with strong volume energy-absorbing power.
Background technology
In biochemical wastewater treatment, it is necessary to sewage aeration is allowed, so that oxidizing decomposes dirty Organic substance in water and maintains micro- life
Oxygen needed for object vital movement.Wherein, jet-flow aeration method with its higher dynamic efficiency and coefficient of oxygen utilization at biochemical sewage
It occupies an important position in reason.
Jet-flow aeration is so that sewage is oxygenated the swabbing action of air using high-speed water jet, mixed using jet stream and air
The strength turbulent fluctuation that is formed after conjunction reaches mixing wastewater with air.Since jet-flow aeration has oxygenation capacity strong, coefficient of oxygen utilization is high, and (air blast exposes
Gas is generally 6~10%, and jet-flow aeration is generally 30~50%), thus the advantages such as power consumption saves, and operating cost is low, it is given birth in sewage
It is occupied an important position in change processing.
Jet aerator is that collection mixes, reacts, is absorbed in integrated conveying equipment for fluid substances as a kind of fluid machinery, is passed through
The momentum of high-speed jet, energy, mass transfer, aspirate gas and are compressed.
Existing jet aerator is mainly made of components such as suction chamber, spray chamber, mixing chamber and nozzles.By spray chamber
The fluid that projects of nozzle be known as working media, working media is flowed out with high speed from the nozzle of spray chamber, into suction chamber, will be inhaled
Enter the gas volume inspiration suction chamber outside chamber, the gas being inhaled into is known as injection medium, and working media is situated between with by the injection of volume sucking
Matter enters mixing chamber together, and air-water mixture experienced mixing wastewater with air in mixing chamber, finally at emulsus air water two-phase mixture
It is projected from nozzle, forms plane turbulent jet.Can the pattern and its volume energy-absorbing power of jet aerator be to improve jet stream exposure
One of the dynamic efficiency of gas system and the key technology of coefficient of oxygen utilization, and the oxygen for how further increasing conventional fluidic aerator turns
It is a urgent problem to be solved to move quality, the oxygen in air is transferred in sewage.
Invention content
The technical problem to be solved in the present invention is to provide a kind of jet aerators with strong volume energy-absorbing power, are penetrated for improving
Flow the unit interval oxygen transfer amount of aeration process.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is:A kind of jet stream with strong volume energy-absorbing power
The top of aerator, including suction chamber, spray chamber and mixing chamber, the suction chamber is equipped with injection medium entrance, opposite
Both sides side wall is equipped with inlet and outlet;The spray chamber includes import and nozzle, and nozzle is stretched into from the entrance of suction chamber
In suction chamber;The outlet of the mixing chamber and the suction chamber, and import, outlet and the suction chamber of the mixing chamber
Import, outlet it is coaxial, further include a groove gap formula nozzle, the outlet of the groove gap formula nozzle and the mixing chamber, and
The import of the groove gap formula nozzle, with the import of the mixing chamber, outlet it is coaxial;The outlet of the groove gap formula nozzle is platypelloid type
Groove gap formula outlet.
Further, the import of the groove gap formula nozzle is a diameter of DcCircle, export the groove gap for platypelloid type, groove gap
Both ends are semicircle, and half diameter of a circle is the height h of groove gapc, the overall width of groove gap is bc。
Further, the inlet diameter D of the groove gap formula nozzlecWith the height h of groove gapc, groove gap overall width bcHave following
Relationship:
Further, the volume energy-absorbing power for the plane turbulent jet that the groove gap formula nozzle projects can be stated with following formula:
In formula:For xcBy the mass flow of the surrounding medium of volume sucking plane turbulent jet at point;
For the mass flow of the gas-liquid mixture at groove gap formula spray outlet;
xcFor using groove gap outlet as the axial distance of the turbulent jet of origin;
bcFor the overall width of groove gap.
Further, the import of the spray chamber, the import of nozzle and the suction chamber, export coaxial, the spray chamber
Entrance be equipped with rotational flow generator, to generate turn type jet stream
Further, the rotational flow generator includes at least one layer of helical blade.
From above-mentioned technical proposal it can be seen that the present invention has the following advantages:1. by the round nozzle of conventional fluidic aerator
The propulsive force for having changed the plane turbulent jet projected at groove gap formula nozzle, groove gap formula nozzle establishes a great negative pressure
Area, under identical working media mass flow and jet exit area, plane turbulent jet has the volume energy-absorbing power of bigger, carries
The shear surface for having supplied the progress oxygen transmission than round nozzle bigger, can form the update in continuously gas-liquid contact face, carry
The unit interval oxygen transfer amount of high jet stream aeration process, dynamic efficiency and oxygen to greatly improve jet aerator utilize
Rate;2. the spray chamber for increasing rotational flow generator can make working media generate motion track variation, in spray chamber tapered zone
Domain generates precession whirlpool, and forms turn type jet stream in spray chamber nozzle exit, improves the volume energy-absorbing power of jet aerator, revolves
The volume energy-absorbing power of ejector half jet stream increases with the increase of turn number, and the air imbibed quantity of jet aerator will be with the volume energy-absorbing of jet stream
The increase of power and increase, the amount of gas phase will also increase therewith.
Description of the drawings
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is the side view of the present invention;
Fig. 3 is the stream of the working media shown in FIG. 1 that there is the slave spray chamber of the jet aerator of strong volume energy-absorbing power to project
Dynamic status diagram;
As shown in the figure:1:Suction chamber;11:Injection medium entrance;12:Import;13:Outlet;2:Spray chamber;21:Import;
22:Nozzle;23:Rotational flow generator;3:Mixing chamber;31:Import;32:Outlet;4:Groove gap formula nozzle;41:Import;42:Outlet;
Specific implementation mode
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is the schematic diagram of the jet aerator with strong volume energy-absorbing power described in one embodiment of the invention.Such as Fig. 1 institutes
Show, it includes suction chamber 1, spray chamber 2, mixing chamber 3 and groove gap formula nozzle 4 to have the jet aerator 100 of strong volume energy-absorbing power.
The top of suction chamber 1 offers injection medium entrance 11, and injection medium enters from the import in suction chamber 1, sucking
The opposite both sides side wall of chamber 1 is equipped with import 12 and the outlet 13 of working media, and import 12 and outlet 13 are coaxial, import 12 and goes out
Mouth 13 is about substantially symmetrical about its central axis.Injection medium is the gas containing oxygen, such as air.
Spray chamber 2 is connected to suction chamber 1, and spray chamber 2 is for spraying working media, the working media that spray chamber 2 sprays
Liquid, such as water.The input end of spray chamber 2 is fixed at the import 12 of suction chamber 1, and the ontology of spray chamber 2 is located at suction chamber 1
Interior, the import 21 of spray chamber 2, the import 12 of nozzle 22 and suction chamber 1, outlet 13 are coaxial, and spray chamber 2 is about central shaft pair
Structure, nozzle 22 is claimed to be directed toward the outlet 13 of suction chamber 1.Rotational flow generator 23 is equipped at the import 21 of spray chamber 2, it is preferable that rotation
Flow-generator 23 includes at least one layer of helical blade.By rotational flow generator 23, the motion track of working media changes, with
Turn type jet stream is formed, to increase the turbulent fluctuation degree and volume energy-absorbing power of jet stream.
The import 31 of mixing chamber 3 is connected to the outlet 13 of suction chamber 1, and mixing chamber 3 is situated between for mixing injection medium and work
Matter, the import 31 of mixing chamber 3 export 32 about substantially symmetrical about its central axis, the imports of import 31, the outlet 32 and suction chamber 1 of mixing chamber 3
12, outlet 13 is coaxial.
As shown in Fig. 2, the import 41 of groove gap formula nozzle 4 is connected to the outlet 32 of mixing chamber 3, the import of groove gap formula nozzle 4
41 be a diameter of DcCircle, the outlet 42 of groove gap formula nozzle 4 is a height of hc, overall width bcGroove gap, the both ends of the groove gap are straight
Diameter is hcSemicircle.Mixed injection medium and working media are sprayed from the outlet 42 of groove gap formula nozzle 4, in groove gap formula nozzle
Plane turbulent jet is formed at 4 outlet 42.The import 41 of groove gap formula nozzle 4,42, groove gap formulas symmetrical about vertical plane of outlet
The import 41 of nozzle 4 and the import 31 of mixing chamber 3, outlet 32 are coaxial.
Rotational flow generator 23 is installed on the front end of aerator spray chamber 2, and the rotational flow generator 23 that should carry helical blade will
So that working fluid is flowed out along the nozzle 22 of conical jet chamber in precession circinate, forms high speed turn type jet stream, it is effective to increase
The turbulent fluctuation degree and volume energy-absorbing power of jet stream form strength turbulent flow in the suction chamber 1 of aerator, Air Entrainment are entered turn type jet stream
In, enter the mixing chamber 3 of aerator, since strength turbulent fluctuation, air are sufficiently mixed with water in mixing chamber 3, air together
Countless minute bubbles are cut into, two-phase mixtures fluid is flowed out with emulsus state by groove gap formula nozzle, and plane turbulent jet is formed, into
Enter in sewage.
Fig. 3 is that the working media with the jet aerator of strong volume energy-absorbing power shown in FIG. 1 is penetrated by spray chamber from nozzle
Spray regime schematic diagram when going out.In figure 3, after increasing rotational flow generator 23, working media is penetrated what spray chamber nozzle projected
Stream includes not only axial velocity and radial velocity, further includes tangential velocity.Existing spray chamber 2 ' is without increasing any equipment, work
It only includes axial velocity and radial velocity to make the jet stream that fluid is projected in nozzle, and tangential velocity may be not present.In figure 3, eddy flow
Generator 23 is installed on the front end of spray chamber 2, it makes the working media flowed into from 2 import 21 of spray chamber in the cone of spray chamber 2
Shape region generates precession whirlpool, and forms turn type jet stream in 22 exit of the nozzle of spray chamber and sprayed from nozzle 22, effectively
The turbulent fluctuation degree and volume energy-absorbing power for increasing jet stream, greatly improve the dynamic efficiency and coefficient of oxygen utilization of jet aerator.
Groove gap formula nozzle 4 is connected to after mixing chamber 3, and well-mixed two-phase mixtures fluid is with emulsus state in mixing chamber
The jet aerator by the outflow of outlet 42 of groove gap formula nozzle 4 with strong volume energy-absorbing power, is entered in the form of plane turbulent jet
In sewage.Plane turbulent jet has the volume energy-absorbing power of bigger and carries out the shear surface of oxygen transmission, and the sewage of surrounding is continuous
Volume sucking emulsus state two-phase mixtures fluid in, form the update in continuously gas-liquid contact face, therefore increase gas-liquid
The mass transfer area of two-phase interface, mass tranfer coefficient will also increase therewith, improve the unit interval oxygen transfer amount of jet-flow aeration process.
Further prove that the performance with the jet aerator of strong volume energy-absorbing power is carried from the angle of theoretical research below
It rises.Double-film theory thinks that gas is dissolved in the mass transport process that the process of water is made of four-stage.First stage gas passes through gas
Opposite gas-liquid interface passage, second stage gas by the air film of interface gas side, the phase III by the liquid film of interface liquid side,
In last fourth stage gas diffusion to entire solution.Double-film theory thinks gas when to liquid mass transfer, passes through gas-liquid interface
Resistance mostly come from the liquid film of liquid side.Studies have shown that the main means for influencing total oxygen transfer coefficient have two, one is to subtract
Small thickness of liquid film, another is then the mass transfer area for increasing unit volume solution interface.Jet-flow aeration with strong volume energy-absorbing power
Device is to increase the mass transfer area of unit volume solution interface in terms of two, first, using rotational flow generator 23, improves gas
Volume pipette;Second, using groove gap formula nozzle, plane turbulent jet is formed, volume sucks more sewage, continuously updates
Gas-liquid contact face, therefore increase the mass transfer area at gas-liquid two-phase interface.
Compared with traditional jet stream, the more tangential flow velocity w of turn type jet stream of the invention, rotational flow generator 23 generation
The turn intensity of turn type jet stream be equal to the ratio between the tangential flow velocity w and axial flow velocity u of turn type jet stream that are projected from nozzle 22,
And in figure 3, since there is no tangential flow velocity w, then turn intensity is not present, i.e. turn number is zero.And eddy flow shown in Fig. 2
The turn intensity of turn type jet stream caused by generator 23 indicates with turn number S,
Turn intensity is calculated according to following formula:
In formula, w indicates the tangential flow velocity of turn type jet stream;
U indicates the axial flow velocity of turn type jet stream;
The tangential flow velocity and axial flow velocity of turn type jet stream are indicated with following algebraic equation:
In formula, umThe maximum value for being axial flow velocity at axis;
u0For turn type jet stream nozzle exit axial velocity;
wmFor maximum value of the tangential flow velocity at axis;
w0For turn type jet stream nozzle exit tangential velocity;
D is the diameter of nozzle;
A is the length of nozzle;
K1It is the function of turn number S;
K2It is unrelated with turn number S;
f1And f2It is the function of turn number S, wherein:
H=-0.94559S+1.327715 (7)
The volume energy-absorbing power and turn intensity of turn type jet stream caused by rotational flow generator 23 are proportional, the relationship of the two
It is:
In formula:With the mass flow for being sucked the injection medium in jet stream at x points by volume;
For the mass flow of the working media of nozzle exit;
X is using jet expansion as the jet stream axial distance of starting point;
D is nozzle diameter;
k0And ksFor constant, wherein k0=0.32 and ks=0.8.
By formula (8) as it can be seen that the volume energy-absorbing power of jet stream increases with the increase of turn number S.
The angle of flare of turn type jet stream and turn intensity caused by rotational flow generator 23 are proportional, and the relationship of the two is:
θ=4.8+14S (9)
In formula:θ is the angle of flare of jet stream, i.e. angle between jet stream axial section and edge line, wherein θ=7.60 °~
10.96°。
By formula (9) as it can be seen that with turn number S increase, the angle of flare θ of jet stream also increases therewith, but the axial stream of jet stream
Fast u will decay therewith, this will be unfavorable for the optimization of device geometry.Experiment shows generally S=0.416 to be taken to be advisable.
According to the angle value of angle of flare, the turn number for representing turn intensity can be obtained, caused by rotational flow generator 23
The volume energy-absorbing power and turn intensity of turn type jet stream are proportional, therefore, can compare the jet aerator with strong volume energy-absorbing power
With the volume energy-absorbing power of conventional fluidic aerator.
When θ=7.60 °, can be obtained by formula (9), S=0.2, at this point, k0=0.32, ks=0.8, it can be obtained, be had strong by formula (8)
Roll up the jet aerator of energy-absorbing powerAnd traditional jet aerator,
Due to S=0, thenThe ratio of the two is 1.5, that is, has the rotation of the jet aerator of strong volume energy-absorbing power
The volume energy-absorbing power of ejector half jet stream is 1.5 times of the volume energy-absorbing power of traditional jet aerator.
When θ=10.96 °, can be obtained by formula (9), S=0.44, at this point, k0=0.32, ks=0.8, it can be obtained, be had by formula (8)
The jet aerator of strong volume energy-absorbing powerAnd traditional jet stream exposes
Gas device, due to S=0, thenThe ratio of the two is 2.1, that is, has the jet aerator of strong volume energy-absorbing power
Turn type jet stream volume energy-absorbing power be traditional jet aerator volume 2.1 times of energy-absorbing power.
Work as S=0.416, k0=0.32, ks=0.8, it can be obtained by formula (8), there is the jet aerator of strong volume energy-absorbing power And traditional jet aerator, due to S=0, thenThe ratio of the two is 2.04, that is, has the turn type jet stream of the jet aerator of strong volume energy-absorbing power
Roll up the volume energy-absorbing power that energy-absorbing power is traditional jet aerator 2.04 times.
It is above-mentioned calculation shows that, the jet aerator with strong volume energy-absorbing power of the invention, the volume energy-absorbing of turn type jet stream
Power is 1.5~2.1 times of the volume energy-absorbing power of traditional jet aerator.That is, the mass flow in working media is identical
In the case of, it is the amount of gas inhalation of conventional fluidic aerator to have the amount of gas inhalation of the jet aerator of strong volume energy-absorbing power
1.5~2.1 times.
Groove gap formula nozzle 4 is connected to after mixing chamber 3, and well-mixed two-phase mixtures fluid is with emulsus state in mixing chamber
The jet aerator by the outflow of outlet 42 of groove gap formula nozzle 4 with strong volume energy-absorbing power, is entered in the form of plane turbulent jet
In sewage.Plane turbulent jet has the volume energy-absorbing power of bigger and carries out the shear surface of oxygen transmission,
Plane turbulent jet, axial flow velocity ucmWith axial distance xcVariation indicated with following formula:
In formula:ucmFor the axial flow velocity of plane turbulent jet;
uc0For flow velocity of the plane turbulent jet at groove gap formula spray outlet;
bcFor the overall width of groove gap;
xcFor using groove gap outlet as the axial distance of the plane turbulent jet of origin.
The inlet diameter D of groove gap formula nozzlecWith the height h of groove gapc, groove gap overall width bcThere is following relationship:
In formula:DcFor the inlet diameter of groove gap formula nozzle;
hcFor the height of groove gap;
bcFor the overall width of groove gap.
The volume energy-absorbing power for the plane turbulent jet that groove gap formula nozzle projects can be stated with following formula:
In formula:For xcBy the mass flow of the surrounding medium of volume sucking plane turbulent jet at point;
For the mass flow of the gas-liquid mixture at groove gap formula spray outlet;
xcFor using groove gap outlet as the axial distance of the plane turbulent jet of origin;
bcFor the overall width of groove gap.
As the inlet diameter D of groove gap formula nozzlecIt when=100mm, is taken in formula (11) equal to number, that is, when groove gap formula is sprayed
When the discharge area of head is equal with groove gap formula nozzle import sectional area, then have:
Dc=100mm, bc=167.8mm, hc=50mm;
According to formula (10), just there are the plane turbulent jet that groove gap formula nozzle projects, axial flow velocity ucmWith axial distance xc
Variation relation:
According to formula (12), just there are the volume energy-absorbing power and axial distance x of the plane turbulent jet of groove gap formula nozzle injectioncChange
Change relationship:
As comparison, the mutually accrued of the round turbulent jet emitted by the round nozzle of conventional fluidic aerator is provided here
Formula, axial flow velocity uymWith axial distance xyVariation indicated with following formula:
In formula:uymFor the axial flow velocity of round turbulent jet;
uy0Flow velocity for round turbulent jet in round nozzle exit;
DyFor round nozzle outlet diameter;
xyFor using conventional fluidic aerator circle spray outlet as the axial distance of the round turbulent jet of origin.
The volume energy-absorbing power for the round turbulent jet that the round nozzle of conventional fluidic aerator projects can be stated with following formula:
In formula:For xyThe mass flow of the surrounding medium of round turbulent jet is sucked at point by volume;
For the mass flow of the gas-liquid mixture in the round nozzle exit of conventional fluidic aerator;
xyFor using conventional fluidic aerator circle spray outlet as the axial distance of the round turbulent jet of origin;
DyFor the outlet diameter of conventional fluidic aerator circle nozzle.
When the discharge area of conventional fluidic aerator circle nozzle is equal to the discharge area of groove gap formula nozzle, also
It is to work as DyWhen=100mm, according to formula (15), just there are the round turbulent jet that conventional fluidic aerator circle nozzle projects, axis
To flow velocity uymWith axial distance xyVariation relation:
According to formula (16), just there is the volume energy-absorbing power of the round turbulent jet of conventional fluidic aerator circle nozzle injection with axis
To distance xyVariation relation:
From formula (14) and formula (18), so that it may calculate the groove gap formula nozzle and biography of the jet aerator with strong volume energy-absorbing power
The ratio of the volume energy-absorbing power of the round nozzle of system jet aerator:
When the round nozzle of the groove gap formula nozzle and conventional fluidic aerator of the jet aerator with strong volume energy-absorbing power
When gas-liquid mixture mass flow is equal, and under conditions of the two discharge area is also equal, according to the company of incompressible fluid
Continuous property condition, just has:
Investigate is being x away from outlet axial distancec=xy=Dc=DyAt=100mm, calculated according to formula (19):
From formula (20) it is found that in the case where gas-liquid mixture mass flow and spray outlet sectional area are equal, away from
Outlet axial distance is equal at jet diameters, has the volume energy-absorbing of the groove gap formula nozzle of the jet aerator of strong volume energy-absorbing power
Power is the round nozzle volume energy-absorbing power of conventional fluidic aerator close to 1.5 times.
When
It is found that at outlet, such as it is being equal at the 1/2 of jet diameters away from outlet axial distance, is having
The groove gap formula nozzle of the jet aerator of strong volume energy-absorbing power has stronger volume energy-absorbing than the round nozzle of conventional fluidic aerator
Power reaches 2.1 times.
There is the jet aerator of strong volume energy-absorbing power, advantage to be by the embodiment that aforementioned present invention provides:1.
Increasing the spray chamber of rotational flow generator can make working media generate motion track variation, be produced in the conical region of spray chamber
Raw precession whirlpool, and turn type jet stream is formed in nozzle exit, the volume energy-absorbing power of jet aerator is improved, turn type jet stream
Volume energy-absorbing power increases with the increase of turn number, the air imbibed quantity of jet aerator by with the increase of the volume energy-absorbing power of jet stream and
Increase, the amount of gas phase will also increase therewith;2. changing the round nozzle of conventional fluidic aerator at groove gap formula nozzle, groove gap
The plane turbulent jet that formula nozzle projects is with the shearing table than the round nozzle volume energy-absorbing power with bigger and progress oxygen transmission
Face, forms the update in continuously gas-liquid contact face, therefore increases the mass transfer area at gas-liquid two-phase interface, mass tranfer coefficient
It will increase therewith, and improve the unit interval oxygen transfer amount of jet-flow aeration process, to greatly improve the power of jet aerator
Efficiency and coefficient of oxygen utilization.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In presently disclosed technical scope, the change or replacement that can be readily occurred in should all be covered any people for being familiar with the technology
Within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (6)
1. a kind of jet aerator with strong volume energy-absorbing power, including suction chamber, spray chamber and mixing chamber, the suction chamber
Top is equipped with injection medium entrance, and inlet and outlet is equipped on opposite both sides side wall;The spray chamber include import and
Nozzle, nozzle are stretched into from the entrance of suction chamber in suction chamber;The outlet of the mixing chamber and the suction chamber, and it is described
Import, outlet and import, the outlet of the suction chamber of mixing chamber are coaxial, it is characterised in that:Further include a groove gap formula nozzle,
The outlet of the groove gap formula nozzle and the mixing chamber, and the import of the groove gap formula nozzle, with the mixing chamber into
Mouth, outlet are coaxial;The outlet of the groove gap formula nozzle is that the groove gap formula of platypelloid type exports.
2. the jet aerator with strong volume energy-absorbing power as described in claim 1, it is characterised in that:The groove gap formula nozzle
Import is a diameter of DcCircle, export the groove gap for platypelloid type, the both ends of groove gap are semicircle, and half diameter of a circle is the height of groove gap
Spend hc, the overall width of groove gap is bc。
3. the jet aerator with strong volume energy-absorbing power according to claim 2, it is characterised in that:The groove gap formula nozzle
Inlet diameter DcWith the height h of groove gapc, groove gap overall width bcThere is following relationship:
In formula:DcFor the inlet diameter of groove gap formula nozzle;
hcFor the height of groove gap;
bcFor the overall width of groove gap.
4. the jet aerator with strong volume energy-absorbing power according to claim 3, it is characterised in that:The groove gap formula nozzle
The volume energy-absorbing power of the plane turbulent jet of injection can be stated with following formula:
In formula:For xcBy the mass flow of the surrounding medium of volume sucking plane turbulent jet at point;
For the mass flow of the gas-liquid mixture at groove gap formula spray outlet;
xcFor using groove gap outlet as the axial distance of the turbulent jet of origin;
bcFor the overall width of groove gap.
5. the jet aerator with strong volume energy-absorbing power according to claim 1, it is characterised in that:The injection
Import, import, the outlet of nozzle and the suction chamber of chamber are coaxial, and the entrance of the spray chamber is equipped with rotational flow generator, with
Generate turn type jet stream
6. the jet aerator with strong volume energy-absorbing power according to claim 5, it is characterised in that:The eddy flow
Generator includes at least one layer of helical blade.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115501994A (en) * | 2022-10-11 | 2022-12-23 | 山东科川节能环保科技有限公司 | Rotational flow high-efficiency and backflow-prevention injection device |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1354305A (en) * | 1970-04-17 | 1974-06-05 | Houdaille Industries Inc | Aeration of a liquid body |
SU1699616A1 (en) * | 1990-02-07 | 1991-12-23 | Всесоюзный Заочный Политехнический Институт | Method for aeration of liquid |
CN102398988A (en) * | 2011-12-31 | 2012-04-04 | 福州威龙环保技术有限公司 | Sludge reducing high-efficiency biochemical treatment device |
CN103641239A (en) * | 2013-12-10 | 2014-03-19 | 枣庄市申龙水务有限公司 | Novel jet aerator as well as novel jet aeration process |
CN104761067A (en) * | 2015-03-18 | 2015-07-08 | 上海爱地环保技术有限公司 | Jet aerator emitting swirling jet flow |
CN204529482U (en) * | 2015-03-18 | 2015-08-05 | 上海爱地环保技术有限公司 | Launch the jet aerator of turn type jet |
CN205676217U (en) * | 2016-05-26 | 2016-11-09 | 江苏国松环境科技开发有限公司 | Ejector |
CN208883562U (en) * | 2018-06-14 | 2019-05-21 | 伽德钠节能系统(上海)有限公司 | Jet aerator with strong volume energy-absorbing power |
-
2018
- 2018-06-14 CN CN201810611108.2A patent/CN108483628A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1354305A (en) * | 1970-04-17 | 1974-06-05 | Houdaille Industries Inc | Aeration of a liquid body |
SU1699616A1 (en) * | 1990-02-07 | 1991-12-23 | Всесоюзный Заочный Политехнический Институт | Method for aeration of liquid |
CN102398988A (en) * | 2011-12-31 | 2012-04-04 | 福州威龙环保技术有限公司 | Sludge reducing high-efficiency biochemical treatment device |
CN103641239A (en) * | 2013-12-10 | 2014-03-19 | 枣庄市申龙水务有限公司 | Novel jet aerator as well as novel jet aeration process |
CN104761067A (en) * | 2015-03-18 | 2015-07-08 | 上海爱地环保技术有限公司 | Jet aerator emitting swirling jet flow |
CN204529482U (en) * | 2015-03-18 | 2015-08-05 | 上海爱地环保技术有限公司 | Launch the jet aerator of turn type jet |
CN205676217U (en) * | 2016-05-26 | 2016-11-09 | 江苏国松环境科技开发有限公司 | Ejector |
CN208883562U (en) * | 2018-06-14 | 2019-05-21 | 伽德钠节能系统(上海)有限公司 | Jet aerator with strong volume energy-absorbing power |
Non-Patent Citations (1)
Title |
---|
章梓雄等: "《粘性流体力学》", vol. 7, 清华大学出版社, pages: 334 - 337 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115501994A (en) * | 2022-10-11 | 2022-12-23 | 山东科川节能环保科技有限公司 | Rotational flow high-efficiency and backflow-prevention injection device |
CN115501994B (en) * | 2022-10-11 | 2023-08-22 | 山东科川节能环保科技有限公司 | Jet device capable of achieving efficient cyclone and backflow prevention jet |
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