EP3581262B1 - Agencement d'agitateur - Google Patents
Agencement d'agitateur Download PDFInfo
- Publication number
- EP3581262B1 EP3581262B1 EP18177890.3A EP18177890A EP3581262B1 EP 3581262 B1 EP3581262 B1 EP 3581262B1 EP 18177890 A EP18177890 A EP 18177890A EP 3581262 B1 EP3581262 B1 EP 3581262B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- openings
- agitator arrangement
- cleaning
- shaft
- 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.)
- Active
Links
- 238000004140 cleaning Methods 0.000 claims description 103
- 239000007788 liquid Substances 0.000 claims description 75
- 238000005507 spraying Methods 0.000 claims description 41
- 239000007789 gas Substances 0.000 description 16
- 238000013461 design Methods 0.000 description 14
- 235000021056 liquid food Nutrition 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000013019 agitation Methods 0.000 description 10
- 238000005553 drilling Methods 0.000 description 8
- 239000007921 spray Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000011109 contamination Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 235000013361 beverage Nutrition 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000002537 cosmetic Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 235000013405 beer Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000021067 refined food Nutrition 0.000 description 1
- 235000014214 soft drink Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- 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
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
- B01F27/191—Stirrers with two or more mixing elements mounted in sequence on the same axis with similar elements
-
- 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
- B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
- B01F27/2121—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts composed of interconnected parts
-
- 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
- B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
- B01F27/2122—Hollow shafts
-
- 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
- B01F27/91—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with propellers
-
- 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
- B01F35/10—Maintenance of mixers
- B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
- B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
- B01F35/1453—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids by means of jets of fluid, e.g. air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
- B08B9/0936—Cleaning containers, e.g. tanks by the force of jets or sprays using rotating jets
Definitions
- the disclosure relates to an agitator arrangement for mixing a liquid in a mixing tank and for cleaning the mixing tank.
- the disclosure also relates to a mixing tank comprising such an agitator arrangement.
- the disclosure can be arranged for example in the liquid food industry of dairy, beverage, brewing, processed foods, pharmaceutical and cosmetics, or the like.
- mixing tanks and agitators should preferably be designed for providing highly efficient mixing, improved cost-efficiency, zero in-tank maintenance and eliminating contamination risks.
- An object of the present disclosure is to provide an agitator arrangement and mixing tank including such an agitator arrangement, where the previously mentioned problems are avoided. This object is at least partly achieved by the features of the independent claims.
- the dependent claims contain further developments of the agitator arrangement.
- an agitator arrangement for mixing a liquid in a mixing tank and for cleaning the mixing tank.
- the agitator arrangement comprises a rotatable hollow shaft extending in an axial direction, a first impeller secured to the shaft at a first axial position and a second impeller secured to the shaft at a second axial position.
- the second impeller comprises a plurality of openings configured for spraying a cleaning liquid on the first impeller for cleaning the first impeller.
- the second impeller includes an impeller hub and impeller blades secured to the impeller hub. The plurality of openings are located in the impeller hub.
- the second impeller comprises a plurality of openings configured for spraying a cleaning liquid on the first impeller for cleaning the first impeller.
- the impeller hub Having the plurality of openings located in the impeller hub enables simplified manufacturing and more cost-effective design of the agitator arrangement because thereby no additional cleaning units have to be manufactured and installed along the rotatable hollow shaft. Instead, the impeller hub has dual functionality in terms of securing the impeller blades and acting as spray unit for the cleaning liquid.
- the second impeller comprises at least 4, specifically at least 6, more specifically at least 8 and even more specifically at least 16 openings configured for spraying a cleaning liquid on the first impeller.
- at least 4 openings configured for spraying the cleaning liquid on the first impeller are required.
- the openings are preferably more or less equally distributed around the circumference of the hub of the second impeller.
- the plurality of openings have a substantially cylindrical shape with a diameter of 1 ⁇ 4 mm, and specifically of 1.5 - 3 mm.
- the substantially cylindrical shape enables the openings to be cost-efficiently drilled.
- the specific diameter of the openings has during experimental testing shown to provide a strong cleaning spray with adequate flow and coverage for enabling efficient cleaning of the first impeller.
- an axial orientation of the plurality of openings respectively, define an inclination angle of 1-45 degrees, specifically 1-10 degrees, and more specifically 2-5 degrees, with respect to the axial direction of the rotatable hollow shaft.
- a suitable inclination angle of the axial orientation of the plurality of openings depends on parameters such as the distance between the first and second impeller and the diameter of the first impeller. The defined ranges generally provide a satisfactory cleaning result of the first impeller.
- an axial orientation of the plurality of openings define an angle of about 90 degrees with respect to a plane of an interior surface of the impeller hub at a location of each corresponding opening.
- This enables simplified manufacturing of the impeller hub because the openings may be more easily formed, for example by drilling, when the openings extend perpendicular to the surface of the impeller hub at a location of each corresponding opening. Forming an opening, for example by drilling, at an angle ⁇ , wherein 0 ⁇ ⁇ ⁇ 90 degrees, is increasingly difficult upon departing from the perpendicular (90 degrees) orientation to a surface.
- the impeller hub comprises a first part and a second part, wherein the first and second parts are attached to each other, and wherein the plurality of opening are located in the first part and the impeller blades are attached to the second part.
- a distance between the first axial position and the second axial position is 400 ⁇ 4000 mm, specifically 500 ⁇ 3000 mm, in the axial direction of the rotatable hollow shaft.
- the rotatable hollow shaft comprises one or more first shaft sections extending from the first end region of the rotatable shaft to a first axial end of the first impeller, and a second shaft section extending from a second axial end of the first impeller to a first axial end of the second impeller.
- the first impeller is free from openings configured for spraying a cleaning liquid. It is known that deaeration of a liquid food product within the tank results in reduced oxygen content in liquid food products leads to extended shelf life and improved taste stability. Stripping gas for deaeration of the liquid food product is preferably introduced, for example via openings in the agitator arrangement, at a low position within the tank for enabling a maximal reaction time with the liquid food product before the stripping gas bubbles reach the surface of the liquid food product and are vented.
- This design further underlines the need for providing the second impeller with a plurality of openings configured for spraying a cleaning liquid on the first impeller for cleaning the first impeller, because the lack of openings in the first impeller configured for spraying a cleaning liquid makes cleaning of the first impeller more difficult.
- the second impeller further comprises at least one additional opening for each blade of the second impeller and configured for spraying a cleaning liquid on the blades of the second impeller.
- cleaning liquid may be sprayed onto the blades of the second impeller for providing adequate cleaning of the second impeller.
- the agitator arrangement may further comprise a third impeller secured to the shaft at a third axial position.
- the third impeller may for example include a plurality of openings configured for spraying a cleaning liquid on the first and/or second impeller for cleaning the first and/or second impeller.
- a third impeller may further enable improved agitation of the liquid within the tank, as well as use of larger tanks with maintained agitation capacity.
- the third impeller may be free from openings configured for spraying a cleaning liquid.
- the third impeller may be free from openings configured for spraying a cleaning liquid for enabling improved deaeration of the liquid food product, as discussed above.
- a first end region of the rotatable shaft is configured to be attached to an upper side of the mixing tank, and the first impeller is located between the first end region and the second impeller.
- the disclosure relates to a mixing tank including an agitator arrangement as described above.
- the first impeller is located above the second impeller in the mixing tank.
- a first end region of the rotatable shaft is attached to an upper side of the mixing tank, and a second end region of the rotatable shaft is free from attachment to the mixing tank.
- a first end region of the rotatable shaft is attached to an upper side of the mixing tank and a second end region of the rotatable shaft is attached to a lower side of the mixing tank, wherein the agitator arrangement comprises openings in lower cleaning hub for spraying cleaning liquid on a bottom bearing support of the agitator arrangement and/or bottom of the mixing tank.
- FIG 1 there is depicted a partly sectional view of a mixing tank 1 and an outside view of an agitator arrangement 2 located within the mixing tank 1.
- Figure 2 shows a cross-sectional view of the same agitator arrangement 2 according to the disclosure.
- the mixing tank 1 and agitator arrangement 2 are configured for being employed in the food and beverage industry, but also pharmaceutical and cosmetics industry, and should thus preferably be designed for providing highly efficient mixing, improved cost-efficiency, zero in-tank maintenance and very low contamination risk.
- the agitator arrangement 2 is suitable for mixing a liquid in the mixing tank 2 and for cleaning the mixing tank 2.
- the agitator arrangement thus at least has a dual functionality.
- the agitator arrangement 2 is configured for being attached to a top portion 20 of the mixing tank and to protrude into the mixing tank from said top portion 20.
- the attachment of the agitator arrangement to the tank may for example be realised by means a flange of the agitator arrangement and threaded fasteners.
- a first impeller 7 is secured to the shaft 4 at a first axial position
- a second impeller 8 is secured to the shaft 4 at a second axial position.
- the second impeller 8 comprises a plurality of openings 9 configured for spraying a cleaning liquid 10 on the first impeller 7 for cleaning the first impeller 7.
- the first end region 14 of the rotatable shaft 4 is configured to be attached to the upper side of the mixing tank 1, and the first impeller 7 is located between the first end region 14 and the second impeller 8. Moreover, the first impeller is located above the second impeller in the mixing tank 1 shown in figure 1 .
- a power source 11 such as an electrical motor, drivingly connected to the hollow shaft, for example via a transmission unit 12, causes the hollow shaft and associated first and second impellers 7, 8 to rotate and to generate a strong whirl flow and mixing effect of a liquid located within the tank 2.
- the second impeller 8 may comprise further openings configured for spraying the interior surface of the mixing tank and/or a bearing support of the agitator arrangement at a lower part of the agitator arrangement, if such a bearing support is provided.
- pressurized cleaning liquid may also be supplied at a second external inlet 17 in the cleaning mode, and further conveyed through an outer flow path of a double walled section 18 of the shaft 4 to openings located in a spray ball 15 included in the agitator arrangement 2.
- the basic concept of the disclosure is equally applicable to an agitator arrangement 2 without a double walled section of the shaft 4 and without a spray ball 15.
- Cleaning liquid may be drained from the mixing tank via an outlet (not shown) of the mixing tank 1 and re-circulated to the external inlet 13 of the agitator arrangement 2.
- the two axially spaced apart first and second impellers 7, 8 generally provide improved agitation of the liquid within the tank compared with a single impeller agitator arrangement.
- the first and second impeller design also enables use of larger mixing tanks with maintained agitation capacity. Hence, the first and second impeller design enables improved manufacturing cost-efficiency.
- a distance 21 between the first axial position and the second axial position may for example be about 400 ⁇ 4000 mm, specifically about 500 ⁇ 3000 mm, in the axial direction 5 of the rotatable hollow shaft 4.
- the design wherein the second impeller 8 comprises openings configured for spraying a cleaning liquid on the first impeller 7 during cleaning of the agitator arrangement may be particularly relevant in situations wherein the first impeller 7 for any reason is free from openings configured for spraying a cleaning liquid.
- the second impeller 8 comprises opening configured for spraying a cleaning liquid on the first impeller 7 during cleaning of the agitator arrangement.
- the first impeller 7 may be designed to be free from openings configured for spraying a cleaning liquid is when the agitator arrangement 2 further is configured for performing a deaeration process of the liquid within the tank, wherein the openings 9 for spraying a cleaning liquid in a cleaning mode of the agitator arrangement 2 also are used for injecting a deaeration gas into the liquid of the tank 1 in a deaeration mode of the agitator arrangement 2.
- a deaeration gas e.g. N2 or CO2 is supplied to the liquid within the tank via the agitator arrangement 2.
- a deaeration gas also referred to as stripping gas
- stripping gas is supplied from an external source to the agitator arrangement, which subsequently guides the stripping gas to the plurality of openings 9 of the second impeller 8, such that small bubbles of stripping gas are created and allowed to whirl upwards towards the surface of the liquid, thereby stripping oxygen out of the liquid.
- stripping gas is supplied from an external source to the agitator arrangement, which subsequently guides the stripping gas to the plurality of openings 9 of the second impeller 8, such that small bubbles of stripping gas are created and allowed to whirl upwards towards the surface of the liquid, thereby stripping oxygen out of the liquid.
- the stripping is lighter than the liquid and the stripping gas bubbles therefore rise towards the surface, and that is it desirable to have a long reaction time of the gas bubbles with the liquid before the gas bubbles reach the surface of the liquid within the tank 1, it is often advantageous to supply the stripping gas at a low position in the mixing tank. Consequently, when the first impeller 7 is located above the second impeller 8, as seen in a vertical direction of an assembled agitator arrangement within the mixing tank 1, it may be advantageous to have the first impeller 7 free from openings configured for spraying a cleaning liquid, because otherwise a significant portion of the stripping gas would be entering the liquid via openings in the first impeller 7.
- having the second impeller 8 comprising openings configured for spraying a cleaning liquid on the first impeller 7 during cleaning of the agitator arrangement enables implementation of an efficient deaeration process of the liquid within the tank while maintaining an adequate cleaning of the agitator arrangement and tank interior.
- the rotatable hollow shaft 4 comprises a plurality of first shaft sections 22, 23 that are mutually connected and extending from the first end region of the rotatable shaft to a first axial end 25 of the first impeller 7, and a second shaft section 24 extending from a second axial end 26 of the first impeller 7 to a first axial end 27 of the second impeller 8.
- the first and second shaft sections 22, 23, 24 may be threadingly attached to first and/or second impeller 7, 8.
- the second shaft section 24 may be threadingly attached to the first axial end 27 of the second impeller 8.
- Figure 3 shows a cross-sectional view of an example embodiment of a second impeller 8 in a close-up view.
- figure 3 shows two of the plurality of openings 9 located in the second impeller 8 and configured for spraying a cleaning liquid on the first impeller for cleaning the first impeller 7.
- the openings 9 provide a fluid passage between the internal flow path 19 of the rotatable hollow shaft 4 and the exterior of the agitator arrangement 2.
- Design aspects of the plurality of openings that have an effect of the spraying of a cleaning liquid on the first impeller for cleaning the first impeller are selected according to the specific circumstances of each implementation, taking into account factors like type of liquid food product to be cleaned away, the pressure, temperature and detergent of the cleaning liquid, the axial distance between the first and second impellers 7, 8, the radial length of the impeller blades 31, or the like.
- the plurality of openings 9 may have a substantially cylindrical shape. This enables the openings to be cost-efficiently manufactured by drilling.
- the plurality of openings 9 may have a diameter of 1 ⁇ 4 mm and specifically of 1.5 ⁇ 3 mm. This diameter generally results in improved cleaning effect of the first impeller 7.
- a centre of an outlet of the plurality of openings 9, respectively, is located a distance 33 of about 10 - 50 mm from an exterior surface 32 of the rotatable hollow shaft, as seen in a transverse direction 6, which is perpendicular to the axial direction 5 of the rotatable hollow shaft 4.
- the second impeller may for example comprise at least 4, specifically at least 6, more specifically at least 8 and even more specifically at least 16 openings 9 configured for spraying a cleaning liquid on the first impeller 7.
- the second impeller comprises 16 openings 9.
- the second impeller 8 of the example embodiment of figure 4 further comprises a total of three impeller blades 31, equally distributed around the circumference of the second impeller 8. However, the number of impeller blades can be varied.
- the second impeller 8 further includes an impeller hub 34 having the impeller blades 31 secured thereto.
- the impeller hub 34 enables a more modular design of the agitator arrangement by assembling the rotatable shaft 4 out of a suitable combination of first and second shaft sections 22-24 and impeller hubs 34.
- the first and second shaft sections 22-24 may for example be threadingly attached to the impeller hubs 34, either directly or by means of an individual attachment collar 35 as shown in the example embodiment of figure 3 .
- the plurality of openings 9 configured for spraying cleaning liquid on the first impeller 7 are located in the impeller hub. Thereby the impeller blades 31 and the shaft sections 22-24 of the tubular shaft 4 may have a less complicated design and thus being more cost-efficient.
- Figure 5 shows a cross-sectional view along an axial plane of the impeller hub 34.
- the impeller hub may comprise a first part 40 and a second part 41, wherein the first and second parts 40, 41 are attached to each other.
- the first part 40 is configured for being attached to the tubular shaft 4
- the second part 41 is configured to be free from connections to the mixing tank 1 for enabling simplified cleaning of the mixing tank 1 and agitator arrangement 2.
- the second part 41 of the impeller hub 34, or any other part of the agitator arrangement 2 may have connection arrangement for rotatable connecting the rotatable hollow haft 4 of the agitator arrangement 2 to a bearing support for rotatably attaching the second part 41 to the mixing tank 1.
- Such additional fastening of the agitator arrangement 2 may be necessary for avoiding too large bending motion of the rotatable hollow shaft 4 during rotation of the first and second impellers 7, 8.
- the agitator arrangement may comprise at least one opening 50 in a second part 41 of the hub 34 for spraying cleaning liquid on a bottom bearing support of the agitator arrangement 2 and/or bottom of the mixing tank 1.
- the first and second parts 40, 41 are welded together along a circumferentially extending weld seam 42.
- Manufacturing of the second impeller in two parts 40, 41 has several advantages, such as simplified manufacturing of the openings 9.
- the second impeller 34 further has a more modular design wherein a single type of first part 40 may be connected with various different types of second parts 41, for example for enabling attachment to various types and sizes of impeller blades to the impeller hub 34.
- the plurality of openings 9 are located in the first part 40 and the impeller blades are configured to be attached in slits 56 made in the sidewall of the second part 41.
- the first part 40 of the impeller hub 34 may for example, on a first axial side, have a sleeve section 57 facing the second section 24 of the tubular shaft 4, and being configured be being attached to said second section 24.
- the first part 40 of the impeller hub 43 may further, on a second axial side located opposite to the first axial side, have a flange section 58 that extends radially outwards from the sleeve section 57.
- the openings 9 for spraying cleaning liquid on the first impeller 8 may be located in the flange section 58 of the first part 40 of the second impeller 7.
- an axial orientation 60 of the plurality of openings defines an inclination angle 43 of 1- 45 degrees, specifically 1-10 degrees, and more specifically 2-5 degrees, with respect to the axial direction 5 of the rotatable hollow shaft 4.
- These ranges of the inclination angle 43 has shown to provide good results in terms of cleaning effect of the first impeller.
- an axial orientation 60 of the plurality of openings 9, respectively, define an angle 44 of about 90 degrees with respect to a plane of an interior surface 45 of the impeller hub 34 at a location of each corresponding opening 9.
- the surface 45 at the area of the opening 9 is substantially perpendicular to the axial orientation of each opening 9, because thereby the risk that the top edge of the drill drifts away from a desired drilling location. Drilling an opening at an inclined angle with respect to a surface is significantly more difficult than drilling an opening at a straight angle to the surface.
- the modular design of the hub 34 enables drilling from the inside of the hub 34 before the first and second parts 40, 41 of the hub have been secured to each other.
- the second part 41 of the impeller hub 43 may have a substantially cylindrical shape, and one axial side of the second part 41 may be fastened to the radially outer edge of the flange section 58 of the first part 40 of the hub 34.
- FIG 6 shows a side view of the second impeller 8.
- the second impeller 8 may comprise additional openings 70 for each impeller blade 31 of the second impeller 8 and configured for spraying a cleaning liquid on the impeller blades 31 of the second impeller 8.
- the agitator arrangement 2 may equally be equipped with a third impeller secured to the rotatable hollow shaft 4 at a third axial position.
- the third impeller may for example comprise a plurality of openings configured for spraying a cleaning liquid on the first and/or second impeller for cleaning the first and/or second impeller.
- the third impeller may be free from openings configured for spraying a cleaning liquid. Also yet further impellers are possible.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Accessories For Mixers (AREA)
Claims (14)
- Agencement d'agitateur (2) pour mélanger un liquide dans une cuve de mélange (1) et pour nettoyer la cuve de mélange (1), l'agencement d'agitateur (2) comprenant :un arbre creux rotatif (4) s'étendant dans une direction axiale (5) ;une première roue (7) fixée sur l'arbre (4) au niveau d'une première position axiale ;une deuxième roue (8) fixée sur l'arbre (4) au niveau d'une deuxième position axiale ;dans lequel la deuxième roue (8) comprend une pluralité d'ouvertures (9) configurées pour pulvériser un liquide de nettoyage sur la première roue (7), pour nettoyer la première roue (7), caractérisé en ce que la deuxième roue (8) inclut un moyeu de roue (34) et des pales de roue (31) fixées sur le moyeu de roue (34), et dans lequel la pluralité d'ouvertures (9) est disposée dans le moyeu de roue (34).
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel la deuxième roue (8) comprenant au moins 4, spécifiquement au moins 6, plus spécifiquement au moins 8 et encore plus spécifiquement au moins 16 ouvertures (9) configurées pour pulvériser un liquide de nettoyage sur la première roue (7).
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel l'agencement d'agitateur (2) comprend un trajet d'écoulement (19) d'une première région d'extrémité (14) de l'arbre creux rotatif (4) vers la pluralité d'ouvertures (9), de sorte que le liquide de nettoyage sous pression amené au niveau de la première région d'extrémité (14) de l'arbre creux rotatif (4) peut être pulvérisé vers l'extérieur au niveau de la pluralité d'ouvertures (9).
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel la pluralité d'ouvertures (9) a une forme sensiblement cylindrique avec un diamètre compris entre 1 et 4 mm, et spécifiquement entre 1,5 et 3 mm.
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel une orientation axiale (60) de la pluralité d'ouvertures (9) définit respectivement un angle d'inclinaison (43) compris entre 1 et 45 degrés, spécifiquement entre 1 et 10 degrés, et plus spécifiquement entre 2 et 5 degrés par rapport la direction axiale (5) de l'arbre creux rotatif (4).
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel un centre d'un orifice de sortie de la pluralité d'ouvertures (9) est respectivement situé à une distance (33) de 10 à 50 mm d'une surface externe (32) de l'arbre creux rotatif (4), vu dans une direction (6) perpendiculaire à la direction axiale (5) de l'arbre creux rotatif (4).
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel une orientation axiale (60) de la pluralité d'ouvertures (9) définit respectivement un angle (44) d'environ 90 degrés par rapport à un plan d'une surface interne (45) du moyeu de roue (34) au niveau d'un emplacement de chaque ouverture correspondante (9).
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel le moyeu de roue (34) comprend une première partie (40) et une deuxième partie (41), dans lequel les première et deuxième parties (40, 41) sont fixées l'une à l'autre, et dans lequel la pluralité d'ouvertures (9) est disposée dans la première partie (40) et les pales de roue (31) étant fixées sur la deuxième partie (41).
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel une distance (21) entre la première position axiale et la deuxième position axiale est comprise entre 400 et 4000 mm, spécifiquement entre 500 et 3000 mm, dans la direction axiale (5) de l'arbre creux rotatif (4).
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel l'arbre creux rotatif (4) comprend une ou plusieurs premières sections d'arbre (22, 23) s'étendant de la première région d'extrémité (14) de l'arbre rotatif (4) vers une première extrémité axiale (25) de la première roue (7), et une deuxième section d'arbre (24) s'étendant d'une deuxième extrémité axiale (26) de la première roue (7) vers une première extrémité axiale (27) de la deuxième roue (8).
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel la première roue (7) ne comporte pas d'ouvertures configurées pour pulvériser un liquide de nettoyage.
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel la deuxième roue (8) comprend en outre au moins une ouverture additionnelle (70) pour chaque pale (31) de la deuxième roue (8) et configurée pour pulvériser un liquide de nettoyage sur les pales (31) de la deuxième roue (8).
- Agencement d'agitateur selon l'une quelconque des revendications précédentes, comprenant en outre une troisième roue fixée sur l'arbre (4) au niveau d'une troisième position axiale ; dans lequel :- la troisième roue comprend une pluralité d'ouvertures configurées pour pulvériser un liquide de nettoyage sur la première et/ou la deuxième roue (7, 8) pour nettoyer la première et/ou la deuxième roue (7, 8) ; ou- la troisième roue ne comporte pas d'ouvertures configurées pour pulvériser un liquide de nettoyage.
- Cuve de mélange, incluant un agencement d'agitateur selon l'une quelconque des revendications précédentes, dans lequel la première roue (7) est disposée au-dessus de la deuxième roue (8).
Priority Applications (2)
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EP18177890.3A EP3581262B1 (fr) | 2018-06-15 | 2018-06-15 | Agencement d'agitateur |
PCT/EP2019/062780 WO2019238356A1 (fr) | 2018-06-15 | 2019-05-17 | Agencement d'agitateur |
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EP18177890.3A EP3581262B1 (fr) | 2018-06-15 | 2018-06-15 | Agencement d'agitateur |
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EP3581262A1 EP3581262A1 (fr) | 2019-12-18 |
EP3581262B1 true EP3581262B1 (fr) | 2021-11-17 |
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EP18177890.3A Active EP3581262B1 (fr) | 2018-06-15 | 2018-06-15 | Agencement d'agitateur |
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WO (1) | WO2019238356A1 (fr) |
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CN111821888A (zh) * | 2020-07-30 | 2020-10-27 | 陶伟 | 一种具有良好清洁能力的自动化肥水混合装置 |
CN112007554A (zh) * | 2020-08-14 | 2020-12-01 | 佛山职业技术学院 | 一种食品加工用注水搅拌装置 |
CN112372871B (zh) * | 2020-10-22 | 2022-07-01 | 安徽美高美高分子材料有限公司 | 一种亚克力板原料混合搅拌装置 |
CN113865330B (zh) * | 2021-10-09 | 2022-10-11 | 重庆医药高等专科学校 | 一种灭菌干燥一体机 |
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JPH09117654A (ja) * | 1995-10-24 | 1997-05-06 | Ishikawajima Harima Heavy Ind Co Ltd | 攪拌槽の洗浄装置 |
JP5764182B2 (ja) * | 2013-11-15 | 2015-08-12 | 株式会社神鋼環境ソリューション | メタン発酵槽の撹拌装置からし渣を除去する方法、及び撹拌装置からし渣を除去することが容易なメタン発酵槽 |
CN207169685U (zh) * | 2017-05-06 | 2018-04-03 | 浙江百辰食品科技有限公司 | 一种化工用反应釜 |
CN206980591U (zh) * | 2017-07-27 | 2018-02-09 | 浙江长江搅拌设备有限公司 | 一种自洁式搅拌机 |
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