Note: Descriptions are shown in the official language in which they were submitted.
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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
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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
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~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
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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
:,
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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
.
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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
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Figure 1~ ~o that the two subassemblies are immediately
mutually interchangeable.
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