CA1186422A

CA1186422A - Immersion aerator

Info

Publication number: CA1186422A
Application number: CA000419124A
Authority: CA
Inventors: Peter Bonn; Werner Arnswald
Original assignee: Individual
Current assignee: Individual
Priority date: 1982-03-22
Filing date: 1983-01-07
Publication date: 1985-04-30
Also published as: EP0089466A1; DE3210475A1; DE3360165D1; ATE13172T1; ES8401425A1; GR77884B; ES520154A0; EP0089466B1

Abstract

Abstract Immersion aerator An immersion aerator for aerating water, particularly waste water, sewage etc., consisting of at least one mixing chamber, a nozzle upstream thereof which generates a water jet through the mixing chamber, a pressurized air connection issuing into the mixing chamber and at least one ejector leading out of the mixing chamber.
In order that the technical apparative outlay of an immersion aerator can be reduced and the immersion aerator can be made more variable from the structural standpoint, a pressurized water storage chamber which is provided upstream of the nozzle issuing into the mixing chamber forms a separate subassembly with the mixing chamber, whilst the pressurized water storage chamber exhibits a collection for pressurized water on the side opposite the ejector and a connection for pressurized air is arranged on the mixing chamber. Such subassemblies can immediately be connected to customary commercial pumps and blowers and can be assembled into any desired larger units by parallel connection.

Description

~ 4 --Lmmersion aerator _ _ ~
The invention relates to an immersion aerator ~or aerating water, particularl~ waste water, sewage etco ~ having at least one mixing chamber, a nozzle upstream thereof which genera-tes a water jet through the mixing chamber, a pressurized air connection issuing into the mixing chamber and at least one ejector leading out of the mi~ing chamberO
Known immersion aerators of the mentioned type are ofrered for sale as complete apparatuses in different sizes and with different capacities. All the functional parts including pump, pump motor, blower, blower motor e.tc. are integrated into the appara-tus and must accordingl~ be adapted to the apparatus~
. It is the underlying aim of the invention to reduce the technical apparati~e outla~ of an immersion aerator and to render the immersion aerator more v~ri~
able from the.structural standpoint~
. This aim is achieved according to the i.nvention b~ providing upstream of -the nozzle issuing into the mi~ing chamber a pressurized water storage chamber which ~orms a separate subassembly with the mixing chamber, whilst the pressuri~ed water storage chamber exhibits a connection for pressurized water on the si.de opposite the ejector and a connection for pressurized air is arranged on the mixing charnber~
~ uch subassemblies can immediately be connected to customary co~nercial pumps and blowers, and can also ~ 5 ~
be assembled to form larger units by connection in parallelO
Ihe pressurized water connection is preferably constructed as a standard flange joint, so that a cu~tomary commercial immersion pump is connectable to the subassembl~ directly or with the interposition of a pipe system.
With the assistance of customary commercial pipe connectors, such as pipe bends 9 pipe branches~
pipe in-tersections etc., the subassemblies can be assembled with ~urther identical subassemblies to form laxger installations of any desiredshape, e.g -to forma cir-cular installation in whichthe ejectorso~ theunits discharge in all directions3 orto ~orm an Plongate installation in which the units ar0 àuxtaposed in parallel.
~ n ad~antageous embodiment o~ the subassembly exhibits two juxtaposed mixing chambers, -the up~tream nozzles o~ which depart from the common pressurized water chamber. It is also possible ~or both mixing chambers to communicate in common with the pressurized air connection, so that only one pressurized water connection and one pressurized air connection need be a~ailable for both mixing chambers.
Ejectors o~ different len~th may lead out o~
the two mixing chambers, sv that the discharge zones o~
the two ejectors are better mutually separated and the ef~icienc~ is consequently greater~
Irrespective of whether the e3ectors are Or e~ual length ox di~feren-t length, they ma~ also be arranged mutually a-t an angle, whilst the axes o~ the e~ectors diverge in the discharge direction. ~he e~icienc~ can like~Jise be further improved by this angular arrangement.
qhe pressurized air connection is convenientl~
arxanged on top o~ the mixing chamber or mixing chambers and constructed as a standard joint, so that th~ relevant subassembly can be connected to a customary commercial blower either directly or with the interposition of a pipe s~stem.
~ he pressurized air connection may be con-structed as a tapped boreO
Xn order to further increase the versatility o~
the connection, the pressurized air connection may be ~urrounded by a mount^ing plate, so that any desired connecting pieces can be mounted thereon. An attach-ment provided with a lateral standard ~lange Joint is pre~erably screwed onto the mounting plate, so that the subassembly ca~ also be combined convenient]~ with stationary installations.
~ he inYention i5 illustrated by wayo~ examplein the drawing and described in detail below with reference to the drawing, wherein:
Fig. 1 shows a subassembly according to the invention, ~i~. 2 ~hows another embodiment o~ the subassembly acco~ding to the inventionl Fig. 3 shows the use of the subassembl~ according to Fig. 1 in a stationar~ instalIation and ~ig. 4 shows the use o~ the subassembly according to Fi~. 1 in a mobile~ ~ariable installation~
In the exemplar~ embodiment illustrated in Figure 17 the subassembly comprises a pressurized water ~torage chamber 1 with a pressurized water connection constructed as a standard ~lange joint 2. On the side opposite the flange joint 21 the pressurized water storage chamber exhibits two outlet orifices 3, which lead each into a mixing chamber 4. ~he outlet orifices contain nozzles 5,-which pass the pressurized water coming ~rom the pressurized water storage chamber 1 ~hrough the relevant mixing chamber 4 in the ~orm o~ a ~et.
At the end of the relevant mixing chamber 4 is arranged an ejector 6 or 7, which projects the water permeated with air bubbles out of the unit. m e ejector 6 is constructed as a re~ativel~ short nozzle~
whereas the ejectox 7 leading out o~ the other mixing chamber 4 exhibits a relativel~ elongate ejector pipe 8 with an enlargement 9 provided at the ejector outlet.
~he discharge zones ~rom the two parallel co~nected ejectors are mutually separated by this measure, so that the disadvantageous bubble coalesce~ce cannot, or cannot seriousl~ occux be~ween the two dischar~e zones.
high degree o~ efficienc~ can be achieved by this measure~
A common pressurized air connection 10 is pro- ..
vide~1 above the two mixing ~hambers 4; it is constructed as a tapped bore 11 and communicates with the two mixi~g chambers 4 through ducts 12,oriented laterally obliquel~
downwards.
~ he use of such a subassembly is highl~
versatile, qhe simplest form o~ its application is to connect a customar~ commercial immersion pump provided with a corresponding counterflangè to the pressurized water connection constructed as a ~lange joint 2.
Simultaneously, a corresponding pressurized air connect~
ion pipe must be screwed into the tapped bore o~ the pressuri~ed air connection 10~ qhis simplest exemplary application, in which the subassembly ma~ be used both stationary and also mobile, is not illustrated in the drawing.
In order to further widen the field o~ applicat-ion of the subassembly, a mounting plate 13 is arranged above the two mixin~ chambers 4 in the plane o~ the , pressurized air connec-tion 10; it is of rectangular const~uction a,nd extends over the total width o~ th~
m unit. qhe mounting plate 13 is provided with'a plurality o~ tapped bores 14 distributed round its circumference, so that other connecting parts to the pressurized air ~eed canbe screwed onto the mounting plate.
~ igure 3 Or the drawing illustrates an exemplar~
application for the subassembl~ according t~ Figure 1, wherein the subassembl~ is part Or a stationar~ instal-lation.
~ he subassembl~ designa-ted by the item ~umber 15 in ~ig. 3 is there provided with an attachment,16 which 9 _ is screwed onto the mounting plate 13 b~ means of screws 177 ~he attachment 16 is provided on one side with a flange 18, to which a bracket 19 for suspending the unit 15 on the foot of a pressurized air feed pipe 20 is attached~ The pressurized air ~eed pipe 20 extends hori~ontally in its lower region 21 and is attached by means of a welded frame 22 to a stationary ~oundation 23 which is arran~ed at the bottom of a water basin 24. ~he horizontal region 21 of the pxessurized air feed pipe 20 is adjoined by a vertical region 25, which projects out above the water level and is there curved back into the horizontal. ~hrough the inter-mediary of a bracket 26, which is similarly constructed to the lower bracket 19, the outlet pipe of a blower 27 arranged beneath the water level is connected to the cu~ved region a.bove the water level; this blower sucks in the air through a suctio~ pipe 28 projecting above the water level and feeds it through the pressurized air feed pipe 20 to the unit 15.
A cus~omar~ commercial immers;.on pump 29, which is connected by a flange to the ~lange joint 2 of the unit 15, forms in common with the unit 15 a cohexent subassembly which is assembled outside the water basin 24 and is passed down into the water by means of a single-pipe guide, known ~ 7 of which only the guide pipe 30 is visible in the installation, and is placed fluid-tightly on the foot of the pressurized air feed pipe 20 with the assistance of the bracket 19.
A retaining chain 31 with two f~xing ends, of :, which the one end is attached to the motor 3~ of the pump 29 and the other end to an eye 33 provided on the attachment 16 of the subassembly 15, serres to lower and raise the component consisting of the subassembl~ 15 and the pump 29~ The raising and lowering movement is e~fected by means of a crane 34, which is al50 used simultaneousl~ for ~aisin~ and lowering the blower 27 Fig. ~ o~ the drawing i:Llustrates a mobile aerator.installation in which eight aerator sub assemblies 15 are mutuall~ combined. The subassemblies 15 are arranged cirsularly at equal angular in-tervals 7 whilst the ~onnecting ~langes 2 of the subassemblies 15 point exactly to the center of the imaginary circle, ~he eight connecting flanges are connected to cor-responding counter~langes 35 o~ an inner ring pipe 36.
~he latter is composed of indiridual pipe branches, namely of three pipe branches 37 with main pipe con-ti~uing in a straight line, ~our pipe branches 38 with main pipe bent through 90, and one pipe intersection 39 with straight main pipe L~ and two s~ubs 41 and 42 provided. at right angles to the main pipe 40, one of the aerator subassemblies 15 being attached to the outwardly directed stub 42, whilst a customar~ com-mercial immersion pump 43, which is op~rated b~ an electric motor 44, is connected *o the inwardly directed stub 41 ~ he inner ring pipe 36 is loaded with pressur~
ized water b~ the immersion pump 43 through the inwardly directed stub 41 mounted on the pipe f~

intersection 399 the pressurized water being distributed throughout the entlre ring pipe 36 and passing from there into the individual pressurized water storage chambers 1 of the eight aerator units 150 A pressurized air ring pipe 45, which like~ise consists o~ individual customary commercial pipe con-nectors~ extends above the pressurized air connections 10 of the subassemblies 15. Associated with each aerator subassembly 15 is a pipe branch 46 which exhibits a straight-main pipe 47 with end flanges L~ on both sides and a branch stub 49 which is provided at the end with a s^rewthread which is screwed into the relevant screwthreaded pressurized air connection 10 of the subassembly 15. The individual pipe branches ~ are connected together b~ pipe bends 50 to form the ring pipe 45.
At least one of the pipe branches l~ is provided with a second branch stub 51 pointing in the opposite direction, to which a pressurized air ~eed pipe 52 coming from a blower, not shown in the drawing9 is connected.
By means o~ short legs 53, which are attached to the pipe bends of the inner ri~g pipe 36, the instal-lation can be erected on the bottom of a water basin which is to be aeratedO
Using the compcnents illustrated in ~igure 4 9 a wide variety o~ forMs of aeration installations of circular, oval, straight or other shape can be assembled.
Instead o~ the aerator subassemblies 15 which .

are illustrated in ~lgso 1~ 3 and 4, a æubassembly 54 as illustrated in Fig. 2 may also be used. The sub-as~embl~ 54 corresponds in all functional parts to the ~ubassembly 15 illustrated in detail in Figure 1. Only the outer form is made different ~rom the subassembl~
15. The pressurized water chamber 55 is adjoined by two tubul'ar mixing ~hambers 56~ which are arranged mutually inclined at an angle o~ approx. 30, so'that t~e two ejectors 57 ad~oining the mixing chambers 56 are also inclined mutually at the same angle, namel~ so that the median axes diverge mutuall~y in the discharge direction.
Ihe subassembl~ 54 also exhibits on its t~p side a central pressurized air connection 58, which is co~nected by ducts 59 to the mixing chambers 56.
In the exemplary embodiment illustrated in Figure 2, both the ejectors 57 are constructed of equal length. Howev,er~ it would also be possible to use ejectors of di~erent length, just as in the exemplar~
embodiment,illustrated in ~igure 1. However, the ef~iciency of the aerator subassembly 54 is alread~
relatively good due to the mutually divergent ejectors, because here again the discharge zones oX the ejectors axe mutuall~ separate~ so that no bubble coalescence can occur between the two discharge zones.~
~ he aubassembly 54 is provided on the side opposite the ejectors 57 with a connecting ~lange 60 which is constructed in the same manner as the connect-ing ~lange 2 in the exemplar~ embodiment illustrated in ~ 13 -Figure 1~ ~o that the two subassemblies are immediately mutually interchangeable.

,

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. An immersion aerator for aerating water, particularly waste water, sewage, etc., having at least one mixing chamber, a nozzle upstream thereof which generates a water jet through the mixing chamber, a pressurized air connection issuing into the mixing chamber and at least one ejector leading out of the mixing chamber, wherein upstream of the nozzle (5) issuing into the mixing chamber (4; 56) a pressurized water storage chamber (1; 55) is provided which forms a separate subassembly (15; 54) with the mixing chamber, whilst the pressurized water storage chamber (1; 55) exhibits a connection (2; 60) for pressurized water on the side opposite the ejector (6, 9; 57) and a connect-ion (10; 58) for pressurized air is arranged on the mixing chamber (4; 56).

2. An immersion aerator as claimed in claim 1, wherein the pressurized water connection is constructed as a standard flange joint (2; 60).

3. An immersion aerator as claimed in claim 1 or 2, wherein a customary commercial immersion pump (29; 43) is connectable to the subassembly (15; 54) directly or with the interposition of a pipe system.

4. An immersion aerator as claimed in claim 1 or 2, wherein the subassembly (15; 54) is assemblable with a plurality of identical subassemblies with the assistance of customary commercial pipe connectors (37, 38, 46, 50) to form a larger installation of any desired shape.

5. An immersion aerator as claimed in claim 1, wherein the subassembly (15, 54) exhibits two juxtaposed mixing chambers (4; 56), the upstream nozzles (5) of which depart from the common pressurized water storage chamber (1; 55).

6. An immersion aerator as claimed in claim 5, wherein both mixing chambers (4; 56) communicate in common with the pressurized air connection (10; 58).

7. An immersion aerator as claimed in claim 5, wherein ejectors (6,9) of different length lead out of the mixing chambers (4).

8. An immersion aerator as claimed in any of claims 5 to 7, wherein the ejectors (57) are arranged mutually at an angle, whilst the axes of the ejectors diverge in the discharge direction.

9. An immersion aerator as claimed in claim 1, wherein the pressurized air connection (10; 58) is arranged on top of the mixing chamber or mixing chambers (4; 56) and is constructed as a standard joint.

10. An immersion aerator as claimed in claim 9, wherein the pressurized air connection (10; 58) is constructed as a tapped bore.

11. An immersion aerator as claimed in claim 9, wherein the pressurized air connection (10; 58) is surrounded by a mounting plate (13).

12. An immersion aerator as claimed in claim 11, wherein an attachment (16) provided with a lateral standard flange joint (18) is screwed onto the mounting plate (13).