EP2756879B1 - Dispositif d'introduction de gaz dans un liquid - Google Patents

Dispositif d'introduction de gaz dans un liquid Download PDF

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Publication number
EP2756879B1
EP2756879B1 EP13152228.6A EP13152228A EP2756879B1 EP 2756879 B1 EP2756879 B1 EP 2756879B1 EP 13152228 A EP13152228 A EP 13152228A EP 2756879 B1 EP2756879 B1 EP 2756879B1
Authority
EP
European Patent Office
Prior art keywords
gas
spinner
liquid
drive shaft
outlet opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP13152228.6A
Other languages
German (de)
English (en)
Other versions
EP2756879A1 (fr
Inventor
Hans-Jürgen KUNZE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Blanck Boris
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP13152228.6A priority Critical patent/EP2756879B1/fr
Publication of EP2756879A1 publication Critical patent/EP2756879A1/fr
Application granted granted Critical
Publication of EP2756879B1 publication Critical patent/EP2756879B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23314—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
    • B01F27/811—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow with the inflow from one side only, e.g. stirrers placed on the bottom of the receptacle, or used as a bottom discharge pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F2035/35—Use of other general mechanical engineering elements in mixing devices
    • B01F2035/353—Lubricating systems

Definitions

  • the invention relates to a device for introducing gas into a liquid according to the preamble of claim 1.
  • a gas for example helium
  • the helium exits at a damaged point on the line and can be located by detectors. This makes it possible to locate the damaged area very accurately and to repair specifically.
  • a nozzle device with a plurality of mixing chambers is known, in which the liquid is introduced and mixed together with the gas.
  • US 5049 320 it is known to pass the gas through a filter fabric in the liquid.
  • the WO 2004/057045 A1 discloses a device for introducing a cleaning gas into a molten metal, wherein the cleaning gas combines with impurities in the molten metal and this removed during the degassing from the molten metal with.
  • a device for introducing atmospheric oxygen in wastewater is known, which store in an open basin.
  • nozzle-based gas enrichment systems are extremely cumbersome, bulky, and unsuitable for mobile use, while leak detection gas-enrichment systems are mobile, easy to transport, and therefore very space efficient and easy to access and easy to damage / maintain must be repairable.
  • the invention is therefore based on the object to provide a low-maintenance and repair-unpredictable device with which a gas highly enriched liquid can be generated and which prevents the escape of the gas from the liquid.
  • the device according to the invention has a mixing unit arranged in a mixing container with a centrifugal wheel arranged on the mixing unit with a radially arranged outlet opening for the outflow of a gas into the mixing container.
  • inflowing or the mixing vessel by flowing liquid gas is introduced into the mixing unit and in the impeller. Due to the rotational movement of the impeller, the gas is introduced by the resulting centrifugal forces from the outlet opening of the impeller at a high speed in the liquid.
  • a particularly rapid and uniform gas enrichment of the liquid is achieved, so that it is possible to sufficiently mix a liquid flowing through the mixing container with gas in order to be able to carry out a subsequent leak detection of the line through which the gas-enriched liquid flows.
  • the achievable by the inventive device homogeneous and fine distribution of the gas in the liquid makes it possible to keep the absolute amount of gas / liter of liquid particularly low, which allows a particularly cost-effective operation of the mixing unit.
  • the rotational speed of the impeller is flexibly adjustable, with an operation with continuously changing speed is possible.
  • the amount of gas to be introduced / time unit can be varied very accurately, so that it is also possible with a particularly compact and a small space consuming introduction device very large amounts of gas in a short period uniformly in a basically arbitrary liquid, eg. Water enter ,
  • a mixing vessel ie a container understood, in which the mixing process between the liquid and the gas takes place.
  • a closed boiler a container understood, in which the mixing process between the liquid and the gas takes place.
  • the boiler can be heated, for example, because the gas absorption capacity of liquids is influenced by the elevated temperatures.
  • a sealed boiler prevents the escape of gas, eg. Helium from the liquid.
  • the mixing unit has a drive unit, for example a motor and a drive shaft driven by the motor and connected to the blower wheel.
  • the drive unit displaces the blower wheel, which is preferably arranged at one end of the mixing unit, into a rotary movement.
  • the mixing unit is designed for receiving, for example, for sucking in or for introducing the gas.
  • the drive shaft via which this is mixed with the liquid, for example.
  • Tubular i. be designed to flow through the gas.
  • the gas flows into the impeller.
  • this has a gas chamber and is thus formed as (at least partially) hollow body.
  • additional mixing effects can be achieved via the basically arbitrary outer geometry of the centrifugal wheel in order to achieve a particularly effective and fine gas distribution.
  • the gas chamber may, for example, be annular and extend over the entire circumference of the blast wheel.
  • the gas chamber may extend only partially, for example, as a radially extending bore above the spinner radius.
  • the blast wheel may have an asymmetrical shape and / or mixing elements arranged on the outside, which lead to a higher turbulence.
  • the centrifugal wheel according to an advantageous development of the invention has at least two gas chambers each with a radial outlet opening.
  • the centrifugal wheel according to an advantageous development of the invention has at least two gas chambers each with a radial outlet opening.
  • three, four or more gas chambers, each with its own radial outlet opening be arranged.
  • the gas chambers are advantageously uniform in size, separated by webs and extending in the radial direction of the spinner.
  • the chambers are preferably arranged around a central axis, for example, about a central gas inlet opening on the blast wheel.
  • the impeller in order to achieve a particularly good distribution of the gas in the impeller, in particular in an embodiment with a plurality of gas chambers, the impeller according to an advantageous embodiment of the invention, a central gas distribution space for distributing the gas into the gas chambers. As a result, a particularly uniform filling of the gas chambers is achieved.
  • the gas distribution space is advantageously central, i. arranged centrally in the impeller and is on the one hand in direct communication with the inlet opening for the flow of gas into the gas distribution space and on the other in direct communication with the gas chamber / n.
  • a particularly compact centrifugal wheel can be provided, which ensures a very uniform outflow of the gas from the impeller.
  • This in turn makes it possible to design the mixer unit particularly compact, which allows the production of particularly space-saving devices.
  • the impeller has an additional vertical outlet opening for discharging the gas into the mixing vessel.
  • a vertical outlet opening is understood as meaning an outlet opening extending in the direction of rotation of the spinner wheel. It may, for example, be arranged on the side of the centrifugal wheel opposite the inlet opening. Also, you can directly opposite the entrance opening, whereby a particularly compact design of the impeller is made possible.
  • the outlet opening is, for example, via a channel with the inlet opening in connection. Also, the vertical outlet opening, for example. With the gas distribution space in combination be or be part of.
  • the gas distribution space has a frustoconical shape.
  • the gas distribution space expands, starting from the inlet opening to the side of the centrifugal wheel opposite the inlet opening, for example a vertical outlet opening.
  • the frusto-conical shape ensures a particularly wide exit of the gas into the liquid, d. H. the gas is introduced from the vertical outlet opening into a large liquid area.
  • the frusto-conical shape promotes a slight inflow of the gas into the radial gas chambers.
  • a high degree of turbulence in the liquid and in the gas is of particular advantage.
  • a first side wall of the gas chamber extending from the radial outlet opening to an inlet opening of the gas chamber is particularly preferably arcuate in cross section and a second side wall of the gas chamber extending from the radial outlet opening to the inlet opening is linear in cross section educated.
  • a side wall is thus flat (flat) while its opposite side wall has an (at least partially) convex or concave shape.
  • the inlet opening is formed drop-shaped in cross section in the gas chamber.
  • the device In order to facilitate the replacement of the impeller in, for example. Damage or for maintenance, the device has a trained for connection to the impeller and with a drive shaft centrifugal mandrel.
  • the spinner wheel is disposed between the drive shaft and the spinner. It can extend the drive shaft to position the spinner lower in the mixing bowl. For example, it is possible to use differently long sprocket spikes when using different mixing vessel heights.
  • the spinner wheel has a gas passage line which can be connected in a gas-tight manner to the gas line in the drive shaft and to the inlet opening in the spinner wheel.
  • the quick coupling is formed with a bolt as a connecting means to achieve a particularly simple fixation of the centrifugal mandrel on the drive shaft.
  • the bolts are diagonally upwards, d. H. in the direction of the gas line and in the direction of the drive unit in the drive shaft screwed.
  • An inserted into the drive shaft Schleuderraddorn is firmly pressed by the acting on him bolts (gas-tight) in the drive shaft.
  • the gas is introduced into the liquid in the radial direction of the blast wheel and by means of a centrifugal force.
  • the gas is distributed in a very large area around the impeller and mixed with the liquid.
  • there is a particularly fine and uniform distribution of the gas in the liquid so that for the leak detection, the amount of gas / liter of liquid can be particularly low.
  • the blast wheel allows to provide a particularly compact and thus portable (mobile) gas enrichment plant.
  • FIG. 1 a transportable plant 1 for enriching a liquid with a gas.
  • the plant 1 comprises a vessel-shaped mixing vessel 2, in which a liquid can be introduced via a pump 3 operated by a motor 3a.
  • a mixing unit 10 (see Fig. 2 ) driving drive unit 5 with a drive motor 5a, a V-belt (not shown) and a V-belt pulley 15 (see FIG. 2 ) arranged.
  • the mixing container 2 has, in the region of its bottom, an outlet valve 4, from which the liquid enriched in the mixing container with a gas can, for example, be fed into a line (not shown here) to be examined for leakage. Further, a plurality of sight glasses 9 and a temperature indicator 9 a for displaying the temperature prevailing in the mixing container 2 are arranged in the wall of the mixing container 2.
  • the mixing container 2 and the motor-driven pump 3 are mounted on a basic frame 6 for particularly easy transport. Furthermore, a switching unit 7 designed for controlling the system 1 and a gas unit 8 are arranged on the basic frame 6, whereby a compact enrichment system 1 is created, which can be used in a particularly flexible and location-independent manner.
  • FIG. 2 shows the mixing unit 10 with the V-belt pulley 15, a drive shaft 11, a sprocket wheel 12 connected to the drive shaft 11 and a blast wheel 13 connected to the sprocket wheel 12.
  • the drive shaft 11 is rotatably supported by the V-belt pulley 15 in a bearing housing 16. Below the bearing housing 16, a connecting flange 14 for connecting the mixing unit 10 with the mixing container 2 is arranged.
  • a gas inlet valve 18 is arranged, via which the gas to be introduced into the liquid is introduced into the bearing housing 16.
  • lubricant valves 19a, 19b for introducing lubricant, via which a bearing housing 16 arranged in the drive shaft bearing 21a, 21b (see FIG. 3 ) is supplied with lubricant.
  • the drive shaft 11 exits from the bearing housing 16 below the connecting flange 14 and, in the mounted state of the mixing unit 10, is located on the mixing container 2 within the mixing container 2.
  • Schleuderraddorn 12 is connected to a first end via a quick coupling 17 gas-tight with the drive shaft 11.
  • the spinner wheel 13 is detachable from the spinner wheel 12 and likewise fixed in a gas-tight manner.
  • the quick coupling 17 allows a particularly simple replacement of the Schleuderraddorns 12 and the impeller 13th
  • FIG. 3 shows the mixing unit 10 in cross section.
  • the mixing unit 10 is bolted via its connecting flange 14 with the mixing container 2.
  • the V-belt pulley 15 is connected to the Drive shaft 11 connected, the drive shaft 11 is rotatably supported in the bearing housing 16 via two slide bearings 21a, 21b.
  • the spinner 12 and the spinner 13 are arranged inside the mixing container 2.
  • the drive shaft 11 has a gas line 20, which is arranged centrally in the drive shaft 11 and is in communication with the gas inlet valve 18.
  • the spinner wheel 12 is connected to the drive shaft 11 via the quick coupling 17.
  • the quick coupling 17 is designed as a detachable screw connection with diagonal upward, i. formed in the direction of the gas line 20 and the V-belt pulley 15 pointing bolts which are screwed into the drive shaft 11 and engage in the Schleuderraddorn 12.
  • A likewise centrally arranged in the spinner wheel 12 gas passage line 22 adjacent in the region of the quick coupling 17 gas-tight to the gas line 20 of the drive shaft 11 and in the region of the impeller 13 also gas-tight to a (gas) inlet opening 27 of the impeller 13, so that one over the Gas valve 18 in the bearing housing 16 introduced gas flows through the gas line 20 and through the gas passage line 22 directly into the inlet opening 27 of the impeller 13.
  • the inlet opening 27 in the centrifugal wheel 13 opens into a central gas distribution space 23.
  • the gas distribution space 23 is adjoined by four radially extending gas chambers 24, each of which has a radial outlet opening 25.
  • the number of gas chambers 24 can be designed flexibly. Thus, for example, only one, two or three gas chambers 24 or, for example, five or more gas chambers 24 may be formed.
  • the central gas distribution space 23 is formed as an open space in the longitudinal axis direction of the mixing unit 10, that is, the gas distribution space 23 has, in addition to the radial discharge openings 25 of the gas chambers 24, a vertical exit opening 26 extending in the longitudinal axis direction.
  • FIG. 4 shows the blast wheel 13 in a perspective view.
  • the centrifugal wheel 13 is in three parts-but one piece-formed and consists of an upper centrifugal disc 35, a lower centrifugal ring 36 and the centrifugal disc 35 and the slinger 36 connecting webs 32.
  • the centrifugal wheel 13 has, as already mentioned above four gas chambers 24, which are formed by a lower side of the upper centrifugal disk 35, an upper side of the lower centrifugal ring 36 and the side surfaces (flanks 24a, 24b) of the webs 32.
  • the upper centrifugal disc 35 has a centrally arranged connecting element 33 for connecting (screwing) the upper centrifugal disc 35 to the centrifugal mandrel 12.
  • the centrifugal ring 36 has a centrally arranged vertical outlet orifice 26.
  • the vertical outlet opening 26 has a chamfer 29 (alternatively, for example, a rounding).
  • the adjoining the chamfer 29 central gas distribution space 23 has in the direction of the centrifugal disc 35 has a tapered frusto-conical shape.
  • inlet openings 31 are arranged on the lateral surface 30 of the truncated cone-like gas distribution chamber 23 (gas chamber) inlet openings 31 are arranged.
  • the gas flowing into the gas distribution space 23 through the inlet opening 27 penetrates through the inlet openings 31 into the gas chamber 24, flows through the latter and enters from the radial outlet opening 25 directly into the liquid present in the mixing tank 2.
  • the spinner 13 rotates at a speed of, for example, about 600 rpm, wherein due to the changing conditions due to temperature fluctuations and different process pressure by rotational speed adjustments in the range of preferably 300 to 1000 U / min, the gas introduction can be kept constant.
  • the gas is preferably pressed into the gas distribution space 23 with a pressure exceeding the water pressure in the container by approximately 0.5 bar.
  • a respective first flank 24a has the gas chamber 24 an arcuate and a second flank 24b of the gas chamber 24 has a linear cross-section.
  • FIG. 5 shows the spinner 13 schematically in horizontal section.
  • the blower wheel 13 has four gas chambers 24 of equal size arranged centrally around the inlet opening 27.
  • the gas chambers 24 are separated by webs 32.
  • the side surfaces of the webs 32 form the flanks of the gas chambers 24a, 24b.
  • Also centrally around the inlet opening 27 are four screw through holes (connecting element 33) for screwing the Schleuderraddorns 12 is formed.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Claims (8)

  1. Dispositif d'introduction de gaz dans un liquide avec une unité de mélange (10), disposée dans un récipient de mélange (2), présentant une roue centrifuge (13) avec un orifice de sortie (25) disposé radialement pour l'échappement d'un gaz dans le récipient de mélange (2),
    caractérisé en ce que
    - le récipient de mélange (2) est une chaudière fermée présentant au niveau de son fond une soupape d'échappement (4) de laquelle le liquide enrichi d'un gaz dans le récipient de mélange (2) peut être alimenté dans une conduite à examiner afin de détecter une éventuelle fuite et
    - une broche de roue centrifuge (12) est disposée, qui est formée pour le raccordement avec la roue centrifuge (13) et avec un arbre d'entraînement (11) et pouvant être fixée via un accouplement rapide (17) avec ce dernier, dans lequel des boulons filetés de l'accouplement rapide (17) peuvent être vissés diagonalement vers le haut dans l'arbre d'entraînement (11) et la broche de roue centrifuge (12) est introduite dans l'arbre d'entraînement (11).
  2. Dispositif selon la revendication 1, caractérisé en ce que la roue centrifuge (13) comporte au moins deux chambres à gaz (24) avec respectivement un orifice de sortie (25) radial.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'est disposé sur la roue centrifuge (13) un espace de distribution de gaz central (23) pour la distribution du gaz dans les chambres à gaz (24).
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la roue centrifuge (13) comporte un orifice de sortie vertical (26) pour l'échappement du gaz dans le récipient de mélange (2).
  5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'espace de distribution de gaz (23) a une forme tronconique.
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un orifice d'admission (31) est formé, partant de l'espace de distribution de gaz (23), pour l'admission du gaz dans le chambre à gaz (24).
  7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que
    - une première paroi latérale (24a) de la chambre à gaz (24) s'étendant de l'orifice de sortie radial (25) vers l'orifice d'admission (31) a une forme arquée et/ou
    - une deuxième paroi latérale (24b) de la chambre à gaz (24) s'étendant de l'orifice de sortie radial (25) vers l'orifice d'admission (31) a une section transversale linéaire.
  8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'orifice d'admission (31) est agencé en forme de goutte.
EP13152228.6A 2013-01-22 2013-01-22 Dispositif d'introduction de gaz dans un liquid Not-in-force EP2756879B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13152228.6A EP2756879B1 (fr) 2013-01-22 2013-01-22 Dispositif d'introduction de gaz dans un liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13152228.6A EP2756879B1 (fr) 2013-01-22 2013-01-22 Dispositif d'introduction de gaz dans un liquid

Publications (2)

Publication Number Publication Date
EP2756879A1 EP2756879A1 (fr) 2014-07-23
EP2756879B1 true EP2756879B1 (fr) 2016-06-08

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EP13152228.6A Not-in-force EP2756879B1 (fr) 2013-01-22 2013-01-22 Dispositif d'introduction de gaz dans un liquid

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH464809A (de) * 1964-02-27 1968-10-31 Kaelin J R Einrichtung zum Umwälzen und Belüften von Wasser
AT352033B (de) 1977-06-28 1979-08-27 Voest Ag Vorrichtung zum einbringen von gasen in fluessigkeiten, insbesondere zum belueften von abwaessern
US5049320A (en) 1990-07-03 1991-09-17 International Environmental Systems, Inc. Gas dissolving system and method
GB2396310A (en) * 2002-12-21 2004-06-23 Foseco Int Rotary device with vanes for dispersing a gas in a molten metal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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