DE8617775U1 - Device for sucking in and mixing in gas mixtures - Google Patents

Description

B e, Scriba n_

Designation: device for suction and mixing of gas mixtures

Applicant: Mr. Benedikt Klaes Bonner Str. 63 5483 Gimmingen

Representative: patent attorney and lawyers

Dipl.-Phys. Th. Koch and Partner _{v χν} <Colmantstr. 20 5300 Bonn 1

The present innovation relates to a device for the suction and mixing of Gas mixtures j in particular of air or an air / ozone gas mixture into the through a protein skimmer guided seawater of an aquarium to be cleaned, with the skimming of colloidal components such as protein particles or other suspended matter and for oxygen enrichment of the roughly mechanically pre-filtered aquarium water, at a water depth or under a hydrostatic one Water pressure of approx. 1 m water column, with gas bubbles of 0.1-0.5 mm in diameter in the contact tube aquarium water located and mixed in to skim off the protein particles and the like Dissolved in water. Such a known device also has a contact tube of a protein skimmer and a centrifugal pump with an impeller for circulating the water flowing through the contact tube.

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It is well known that protein skimmers have the task of removing unwanted substances such as suspended particles from the aquarium water - Colloids, dissolved protein, protein fragments such as amino acids and aromatic amines as completely as possible to remove. This is done according to the flotation principle, in that gas bubbles are attached to the particles Increase the buoyancy of the particles so that they rise against the direction of flow of the water up where they are can be withdrawn from the circuit through an overflow. The direction of flow in the contact tube runs from above downward.

The efficiency of the skimming is strong depends on the size of the gas bubbles used. This is because gas bubbles that are too small result in too little buoyancy own and thereby be torn down by the water flow, while too large gas bubbles too rise quickly in the contact tube and therefore either do not adhere to the particles to be skimmed off in the first place accumulate, or during the ascent of these particles due to the too high rate of ascent to solve. The gas bubbles to be mixed by means of the centrifugal pump should therefore, if possible, have a diameter of 0.1-0.5 mm when they are swirled with the water and mixed into it.

So far, the air or the air / gas mixture by means of vents from linden wood or other fine-pored materials which _t is linked to a compressed air line in compound was introduced into the aquarium water of the contact tube. The use of a centrifugal pump with an open, exhausting water / intake impeller is also known. In such a device with a centrifugal pump, the gas mixture to be admixed is sucked into an annular channel by the water flow,

which is attached peripherally to the impeller at a distance therefrom.

/ are disadvantages of the former method in the

poor producibility of the air or gas, aa the pores in the outflows either encrusted by salt or expanded by ozone in such a way that a constant control and Readjustment of the air pressure and thus the amount of air and the bubble size is necessary.

In addition, the air must be dried in this process for the purpose of ozonizing the aquarium water, because otherwise condensation will precipitate in the ozonizer and it will become inoperable.

In the case of the pump-operated protein skimmers, air drying is superfluous, but the energy requirement of such devices is 550 to 1100 W and the noise level is on the order of magnitude that excludes operation in the home. The size _t, i.e. the outer diameter of 0.5 - 1.0 m and the height of 2.53 - 3.4 m, makes it impossible to set up such a protein skimmer in the apartment. Due to the complicated function and the associated difficult and complex production, such a skimmer is also much too expensive for the vast majority of aquarium operators.

The innovation is based on the idea of a more effective pump for circulating the in the contact tube

to create the water to be purified, whereby Via an injector on the impeller of the centrifugal pump, the water to be defoamed is itself used to sucking in the gas mixture and generating gas bubbles of OJL - 0.5 mm in diameter in the impeller.

Because the protein skimmer works most efficiently when it is operated in countercurrent, i.e. when that is too defoaming water from top to bottom and the gas bubbles from bottom to top through the contact tube, flow against each other, the gas mixture required for skimming must be as far down as possible in the contact tube, be introduced via its outlet.

To make this possible, a negative pressure must be generated that is greater than the hydrostatic pressure on the point at which the gas mixture is to be sucked in via the injector.

The task of the innovation is thus to create a device with a protein skimmer and a Water pump for admixing an air or air / gas mixture, this device, as well as in particular the contact tube itself is characterized by a smaller size, simple construction as well as simple Production and maintenance and a lower energy requirement compared to the known known To distinguish between facilities with centrifugal pumps. It should by means of the device according to the innovation be possible to mix a precisely defined, even amount of air, with air bubbles uniform certain diameter, so that an optimal skimming at a constant water level

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adjusts in the contact tube and suitable diameter of the gas bubbles.

To solve this problem, a device of the type mentioned is provided in which the centrifugal pump in the is attached lower area of the contact tube and laterally in an opening in the wall of the contact tube with its hydraulic part protrudes into the contact tube, in which the pump flange is laterally attached to the Opening wall of the contact tube by means of a thickening and fastening means is fixed on this, in which further within the contact tube the

^: Pump flange a spiral-shaped surrounding the impeller

Forms pressure channel, the transverse to the conveying direction of the impeller lying on the pump pressure side Outlet opening tangential to the circumference of the contact tube is oriented obliquely upwards and opens in a wide outlet over a large part of the impeller, wherein the wall of the pressure channel in the outlet opening ends in correspondingly aligned guide surfaces, and in which the impeller to the interior of the contact tube the side is closed except for a central suction opening located in the axial area, and in the case of the suction opening through a part fixed in it with central and / or peripheral Water suction openings and a central suction port to form an injector itself partially closed is, wherein the injector is connected via a supply line to an air pipe which passes through the Pump flange or the wall of the contact tube after is led outside.

In such a device is now in the

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Centrifugal pump the water sucked in from the contact tube And that via the injector supports or the trachea sucked in LtIf t / gas mixture> with suitably set Injector or by selecting and setting the effective throughflow cross-sections of the outlet openings on the Pressure side and the Ansäügöffniing on the sucking side of the Pumpjäls water / gas mixture of about 10: 1 vol. % mixed together so that gas bubbles 0.1-0.5 mm in diameter are generated in the centrifugal pump and into the Finally, aquarium water can be added.

The outlet opening of the pressure channel or flange of the directed tangentially to the circumference of the contact tube Centrifugal pump now causes a reduction in particular also through the selected large-area outlet opening the counter pressure and thus an increase in the water throughput and thus an increase in the negative pressure at the suction port of the impeller.

This negative pressure is created in the area of the injector or in the central intake port and in the area of the other peripheral water suction openings in the per se up to its central area closed impeller effectively.

The fixed in the suction opening of the impeller Part with its water intake is firmly opposite the side edge of the cover of the Impeller on and seals there, whereby the negative pressure required for the operation of the injector directly is reached in the vicinity of the injector.

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The effective ratio of the opening areas of the central water suction opening (area of the suction nozzle minus the area of the injection nozzle protruding coaxially into the suction nozzle) to the areas of the outer water suction openings must be relatively low, so that primarily water into the pump or through the outer water suction openings the part fixed there in the suction opening flows in. In this way, the supply of air or an air / gas mixture through the injector connector is positively influenced, with a better mixing of the air / gas mixture with water also results.

In order to better guide the air injected in the center of the intake port 5 of the circular disk to the side and with the To swirl incoming water, there are individual radial channels on the back of the circular disk which are laid out from the center of the circular disk lead individual water inlet openings on the peripheral circumference of the circular disk.

The device according to the innovation enables the generation of the smallest air bubbles while remaining constant Air volume. The parts of the device or the centrifugal pump that are relevant for the generation of these bubbles become constantly flushed with water so that they do not become too salty. No readjustment is therefore necessary.

The motor of the centrifugal pump is preferably provided with water-lubricated slide bearings and runs at the same time Noiseless * As the motor does not require a shaft seal such as oil seals or mechanical seals an energy saving.

A further energy saving compared to the devices mentioned at the outset resulted insofar as that There is no drying of the air for the purpose of ozonization

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the motor of the centrifugal pump is only driven with a power consumption of 6Ö or 80 W. Mix in 300 or 400 liters of air per hour (preferably Number of revolutions at 60 W: 1,700 - 2,200 revolutions / min * and at 80 W 2,000 = 2,500 revolutions / min.)

The space requirement of the device is considerably less than with the previous protein skimmers with exclusively water-circulating centrifugal pumps, as the contact tube only needs an outer diameter of 20 cm.

Further advantageous embodiments of the innovation result from the protection claims and now the following description of a preferred embodiment based on the drawings thereof.

In the drawings represents

Fig. 1: the plan view of an embodiment of the according to the innovation, with the lateral extension up and down Contact tube of the skimmer is indicated, and between these two wall sections in an opening of the hydraulic part of the centrifugal pump is introduced into the contact tube and on the left the pump motor is located outside the contact tube;

Fig. 2: the hydraulic part of the centrifugal pump, in one

View from the inside of the contact tube, with in the middle the one in the suction opening of the Closed impeller inserted circular disc with the central intake and the on one peripheral circle arranged outer water suction openings can be seen, and in doing so laterally outside of the covered impeller of the forming the outlet openings on the pump pressure side, guided in a spiral around the impeller Pressure channel can be seen;

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3: a sectional view along the line A-B of Fig. 2 showing the centrifugal pump and the arrangement of the pump flange laterally the wall of the contact tube, the hydraulic part through an opening in the contact tube the centrifugal pump protrudes into the interior of the contact tube.

I FIGS. 1 and 3 is one on a contact tube 1

I protein skimmer (diameter 20 cm) using a

iji flange 2 is a centrifugal pump 17 with an external drive motor

I 12 and an inner one protruding into the contact tube 1

I attached hydraulic part of the centrifugal pump.

ti The pump flange 2 is against the contact tube 1

I sealed.

I through an air tube 3 in the pump flange 2 is from

j- outside to inside via a hose line S.

, Air / gas mixture of the pump one in its

·; Suction opening 11 'located injector 5, 6 supplied.

I According to Fig. 2, the pump flange forms an inside

κ pressure channel 15, which the Ausittsöffnuneen on

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I forms the pump pressure side. The pressure channel 15 surrounds

I spiral the impeller 4 of the centrifugal pump,

1 whereby by the outward receding

j. Outer wall 15 'of the pressure channel the cross section

i of the pressure channel expanded.

The pressure channel 15 has outlet openings

'; on, which is wide above and to the side

4 of the impeller up and forward to the inside of the

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Open contact tube 1 - The point at which the surrounding outer wall 15 'of the pressure channel 15 the circumference of the impeller 4 is closest, corresponds to the beginning of the in

free cross-section widening pressure channel 15. The |

The pressure channel 15 ends in the 'radial outlet opening.?'

9 of the centrifugal pump at the top of the flange in |

Guide surfaces 18, 18 ', which correspond to the outlet |

of the pressure channel tangential to the circumference of the contact tube run obliquely upwards.

The injector that supplies the air / gas mixture has a suction nozzle 5, in which axially the longer injection nozzle 6 is smaller from the front Diameter protrudes in the middle. The injection nozzle 6 is connected via a connecting hose 8 to the pump flange 2 or the wall of the contact tube!,

1 guided air pipe 3 connected. |

The injection port 6 protrudes 2.5 mm into the i

Intake manifold 5 in. The outside cylindrical?

Injection port 6, which is inserted into the suction port 5 of the impeller 4 is guided, is guided freely in this. The injection port is stored thereby over a web 7, which is laterally of the opposite edges of the flange 2 as a bridging over the center of the impeller extends at a distance therefrom.

In a central bore of the web 7, an elongated hole guide is provided, by means of which the Center the injection port 6 and move it in the direction of the suction port 5.

The web 7 can at the same time at the top of the

Wall of the channel 15 in the guide surface 18 ′ 1 there

pass over, and thus at the same time part of the

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Outlet opening 9 of the spiral pressure channel 15 form.

The pressure channel 15, which has no end wall to the inside of the contact tube, that is, opens into the The contact tube extends, preferably points to the guidance of the impeller 4 freely supported in a clamping sleeve a shoulder 18 ″ that runs concentrically around the impeller.

It turns this way between the front and back Back of the closed impeller an equilibrium pressure, so that an optimal Guiding the pressure wheel on the clamping sleeve 21 or the shaft 22 of the pump motor results.

The clamping sleeve 21 is laterally under cover of the impeller and for mounting the clamping sleeve itself provided with a convex plate, which runs out peripherally on the wing blades.

According to Fig.l this is in the side edge of the pump flange 2 applied air pipe 3 with the suction port 5 of the injector or the impeller through a hose 8 connected, which is guided over the impeller and centrally from the inside of the contact tube to the axial to Impeller arranged injector runs. Through this

Hose 8 is the air / gas mixture of fed to the injector 5, 6 outside the contact tube.

According to Fig. 3 sina suction nozzle 5 and injection nozzle precisely matched in their diameters, the intake manifold 5 forward in the direction of the Impeller tapers conically in its inner diameter by 1 mm and at its front opening 19 a

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Has an inner diameter of 7.5 mm. The injection step 6 J;, st it is cylindrical and has an outer diameter of 5 mm.

Änsaustutzen 5 and injection supports 6 are included arranged coaxially to each other, so that the water flowing in between these two nozzles the im Injection port 6 pending air into the impeller soaks in.

In the impeller 4 or in its suction opening II ¹ , a circular disk 10 is attached so that its outer edge 20 rests on the suction opening 11 'of the impeller, which ends in a collar-shaped connector 11, and closes it (FIG. 3). The circular disc 10 rotates with the impeller 4. In this circular disc 10, according to FIG of 70 mm.

The openings 14 of the through bores, which are offset from one another by 22.5 °, are through radial channels (Width 1.2 mm and depth 4 mm) on the side of the circular disk facing the inside of the impeller 4 connected to the intake manifold 5.

The inner diameter of the sixteen peripheral openings 14 depends on the hydrostatic pressure which has to be overcome to remove the air / gas mixture from the Injection port 6 to suck in.

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At a hydrostatic pressure of 1-1.5 m / water column and a water temperature of 20 ^° C. with a density of the sea water of 1,024 g / dm ³ , the opening area of the bore 14 is preferably about 2.4 times the effective sieve resulting Water inlet opening of the suction port 5.

The centrifugal pump 17 consists of a canned motor (asynchronous motor, 40 Hz with a switchable power consumption of 60 or 80 W). The shaft and bearings of the centrifugal pump are made of oxide ceramic, while the can and the impeller are made of chrome-nickel steel. The impeller has an outer diameter of 70 mm, the diameter of the suction opening II ^{1 being} 30 mm.

The clear height of the impeller is in the suction opening 11 'at the beginning of the wing between the Top of the cover 16 covering the impeller and the underside of the impeller 6.2 mm and on the periphery of the blades 4 mm.

The circular disk 10 has a thickness of 5 mm, with the intake stub defined in this disk 9 mm long (measured from the opening 19 to the beginning of the radial channels 13).

With a canned motor power consumption of 80 W, this results in a speed of 2000-2500 Revolutions per minute.

In operation, the pump motor 12 sets the impeller 4 in rotation, whereby by the impeller 4 to the Edge on the back of the circular disk 10 of the impeller

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water accelerated an underpressure in the canals the circular disk 10 is created * This negative pressure sucks wiedeftlm water "through the central suction nozzle 5 to the side of the injection nozzle 6 and through the holes 14 of the peripheral «circle of holes *

The water flowing through now generates, according to the injector principle, a negative pressure ± m fixed injection nozzle 6 which causes the supply of air or an air / gas mixture via the connecting line 8 and the air supply pipe 3.

The gas-water mixture that has entered through the injector is now rotated by the centrifugal force Impeller conveyed to the periphery of the circular disk 10, where it is a breakdown of the flow and thus the Avoid collapse of the negative pressure, with the, through the holes IA of the peripheral bolt circle incoming water mixed. After leaving the impeller 4, the water / gas mixture is in-the spiral pressure channel 15 to the top in the pump flange located outlet opening 9 and conveyed back through this into the contact tube 1. Due to the inclined, tangential to the contact tube upward arrangement of the outlet opening 9 and through the guide surfaces 18, 18 'of this opening, that located in the contact tube in front of the pump Water set in rotation.

This causes a partial separation of water and gas bubbles, with the lighter gas bubbles predominating be displaced towards the middle of the tube, which causes a reduced re-suction of the gas bubbles through the Injector, and thus an increase in the air resp.

Gas mixture intake by water discharge with little admixture has the consequence of Gäsblasenänfceil.

The result of negative pressure and the associated expansion Air or the gas mixture increased in volume is swirled in this state and mixed with the water to be defoamed, creating bubbles, their uniform size of 0.1 - 0.5 mm ideal for the The skimming process is.

Claims (11)

Applicant: Mr. Benedikt Klaes Bonner Str. 63 5483 Gimmingen Protection claims 1. Device for sucking in and mixing in gas mixtures, in particular air or an air / Ozone gas mixture into the seawater of an aquarium to be cleaned, which is passed through a protein skimmer, with skimming of colloidal components such as protein particles or other suspended matter and for Oxygen enrichment of the roughly mechanically pre-filtered Aquarium water, at a water depth or under a hydrostatic water pressure of approx. 1 m water column, whereby gas bubbles of 0.1-0.5 mm diameter are mixed into the aquarium water in the contact tube and to skim off the protein particles and the like these are attached or dissolved in the water, consisting of a contact tube of a protein skimmer and a centrifugal pump arranged on it an impeller, characterized in that the centrifugal pump (17) is in the lower region of the contact tube (1) is attached and laterally in an opening in the wall of the contact tube (1) with her hydraulic part protrudes into the contact tube, that the pump flange (2) laterally on the opening wall of the contact tube by means of a seal and fastening means on this is set that within of the contact tube det pump flange (2) a spiral pressure channel (15) surrounding the impeller (4) forms, whose outlet opening (9) lying transversely to the conveying direction of the impeller on the pump pressure side is oriented tangentially upwards to the Urafangskreis of the contact tube and opens in a wide outlet over a large part of the impeller, the wall of the pressure channel in the outlet opening (9) in such aligned guide surfaces (18, 18 ') ends that ^J as impeller (4) to the interior of the contact tube laterally to a location in the axial region central suction opening (H' is closed), and that the suction opening (H ') by a in its fixed part (10) with central and / or peripheral water suction openings and a central suction nozzle (5) to form an injector itself is partially closed, the injector being connected via a supply line to an air pipe (3) which is connected through the pump flange ( 2) or the wall of the contact tube is led to the outside. 2. Apparatus according to claim 1, characterized in that in the suction opening (H ¹ ) of the impeller (4) a circular disk (10) is introduced which has a central receiving opening (19) for free coaxial mounting of an injection nozzle (6) for the to be supplied Air / gas mixture and to form the injector (5, 6), a ring of small openings of through bores (14) being placed coaxially at a distance from the outer edge of the circular disk (4), through which, in contrast to the opening (19 ) of the central suction port (5) the sucked water flows into the pump. 3. Device according to claim 1 or 2,
characterized in that
Between the middle suction opening (Ϊ1 ') or the
Intake nozzle (5) of the circular disc (4) and the individual
arranged over a peripheral circumference of the circular disk
circular openings (14) each one on the inner
or the back of the circular disc (4) embedded in it
radially directed channel (13) is created * 4. Device according to one or more of the
preceding claims 1- 3, characterized in that the intake port (5) of the injector (5, 6) in an axial direction Extension of the axis of the impeller (4) of the Centrifugal pump (17), or in the middle of the suction opening j (II ¹ ) of the impeller is applied. 5. Apparatus according to claim 4, f, characterized in that the intake port (5) of the injector in the intake section opening (H ¹ ) of the centrifugal pump (17) or in the | Circular disk (10) positioning means for connection with I. the pump flange (2) or the pump housing. | 6. Apparatus according to claim 4 or 5, § characterized in that I the injection support I (6) protruding into the suction nozzle (5) over the pump flange or the pump housing .4 is mounted and in the direction of the impeller longitudinal «f is adjustable. 7. Device according to one or more of the
preceding claims 1-6, characterized in that | 4th j r; "** · * -τ ^ - ^ ^: " --- yfinr τ ιir-T'T " «« 4 4 4 ti · * Il 4 ·· * 4 4 4 4 4 4 * * · A 44 «44M4 t 4 44 4 44 · «· 44 i ! ■ mil 44 4 44 the water inlet openings or * through holes (14) on de mpefiphefen circumferential circle of the circular disk (10) in the total size of their opening cross-sections are significantly larger than the water inlet opening formed in the injector between the injection nozzle (6) And intake manifold (5) (e.g. * area ratio of approx » 2.4: 1). 8. Apparatus according to claim 7, characterized _s that for mounting the injection nozzle (6) a transversely at a distance over the center of the impeller (4), from one flange side to the other flange side extending web (7) is applied, in the middle of which a longitudinal bore with a lockable sliding guide for the longitudinally adjustable injection nozzle (6) is applied. 9. Device according to one of the preceding claims 1 - 8, characterized in that the injection nozzle (6) has an outer cylindrical shape, being within a Inner diameter to the impeller (4) conically narrowing opening (19) of the intake port (5) or * the Circular disc (10) is arranged * 10 * device according to one of the preceding claims 1 - 9, characterized in that, while reducing the delivery pressure, the delivery flow of the pump is increased in that the outlet opening (9) on the outlet side of the centrifugal pump is enlarged from 150-200 cm ^a , with «♦ i» 6 wi »· um at the same time there is an increased on the suction side in the impeller Negative pressure occurs. 11. Device according to one of the preceding claims I - 10, characterized in that the otherwise closed impeller (4), which has the suction opening (II ¹ ) towards its center, merges into a flanked, circular edging or such a collar stub (11) against which the circular disk (10) can be sealed with a press fit and can be fixed, the circular disk having the central suction opening (19) for contact with the injector and the additional water inlet openings (14) placed on a peripheral circumference for the entry of the liquid. _{12, etc.} A device according to claim 11, characterized in that the circular disc (10) having an outer flange (12) which rests on the outer collar-shaped supports (11) of the opening of the wing Fades (4).