EP1621841A1 - Dispositif de pulvérisation avec une configuration de jet non circulaire - Google Patents

Dispositif de pulvérisation avec une configuration de jet non circulaire Download PDF

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Publication number
EP1621841A1
EP1621841A1 EP05106905A EP05106905A EP1621841A1 EP 1621841 A1 EP1621841 A1 EP 1621841A1 EP 05106905 A EP05106905 A EP 05106905A EP 05106905 A EP05106905 A EP 05106905A EP 1621841 A1 EP1621841 A1 EP 1621841A1
Authority
EP
European Patent Office
Prior art keywords
sprayed
liquid
sprayer
deflector
fraction
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.)
Granted
Application number
EP05106905A
Other languages
German (de)
English (en)
Other versions
EP1621841B1 (fr
Inventor
Jerzy Mosiewicz
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.)
SPIG SpA
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SPIG SpA
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Publication date
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Publication of EP1621841A1 publication Critical patent/EP1621841A1/fr
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Publication of EP1621841B1 publication Critical patent/EP1621841B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F25/00—Component parts of trickle coolers
    • F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
    • F28F25/06—Spray nozzles or spray pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B05B1/265—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being symmetrically deflected about the axis of the nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
    • B05B3/0486—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet the spray jet being generated by a rotary deflector rotated by liquid discharged onto it in a direction substantially parallel its rotation axis

Definitions

  • the present invention relates to a sprayer suitable to spray with a liquid and with predetermined uniformity even a non-circular zone of a predetermined surface; a sprayer of this type can be used, for example, in cooling towers with gas/liquid crossflow.
  • heat exchange is known to be obtained between a gaseous medium and a liquid by spraying the liquid - for example water - in droplet form from above onto a body of grids packed together, and by causing an ascending gas current to flow through these packed grids; some examples of these grids are described in the European patents EP 311 794, EP 503 547, EP 1 152 205, EP 931 239, US2003/0183956A1.
  • the circular areas sprayed must be partly overlapped by adjacent sprayers, or these areas must be approximately tangent in some points; in any case, the total area will be sprayed with less uniformity than the single circular areas sprayed by a single sprayer.
  • the object of the present invention is to provide a sprayer with a plurality of which a given area even with a non-circular shape - for example square, rectangular, triangular or polygonal - can be sprayed with greater uniformity compared to prior art sprayers.
  • this object is attained with a sprayer suitable to spray a predetermined area with a sprayed liquid, said sprayer comprising:
  • a single sprayer as defined above can spray, relatively uniformly, an area therebelow, even non-circular in shape, such as a square, rectangular, triangular or more generally polygonal area: with a plurality of sprayed areas with these shapes it is possible to cover a larger area with fewer overlapping zones between areas sprayed by two adjacent sprayers, and therefore to spray the total area with greater uniformity. With the same total sprayed surface it is therefore possible to reduce the consumption of sprayed liquid and increase the efficiency of the cooling tower, or of a more general spraying system.
  • downstream and upstream refer to the flow of liquid to be sprayed, in the sense that, if a particle of fluid during operation of the nozzle first reaches the element A and then the element B, the element A is said to be upstream of the element B.
  • distributed with circular symmetry is intended as a distribution, in particular of density of droplets, uniform in the points positioned at the same radial distance from a central point of said distribution.
  • the sprayer 1 in Figures 1-3 comprises an upper fixing body 2 which can be connected, by means of the connection 3 - which can for example be a threaded, bayonet or yet another type of connection - to a suitable supply duct of the liquid to be sprayed, such as water or another liquid; a plurality of sprayers 1 can, for example, be disposed over a mass of trickle grids of a cooling tower, to be sprayed with water or another liquid to be sprayed.
  • a jet of liquid to be sprayed - jet referred to as “inlet jet” in the following description - is delivered from the nozzle 4 - referred to in the following description as “upstream nozzle 4" - and is directed against the deflector 5, which comprises a conical part 6 projecting in the direction of impact of the upstream jet against the deflector and facing away from said jet, and a flange 7, located at the base of the conical projecting part 6 and having an external perimeter with an approximately square shape in the plane; preferably, although not necessarily, the flange 7 has a slightly convex upper surface - facing towards the upstream nozzle 4 - in the direction of flow of the liquid to be sprayed thereon; said convex shape promotes concentration by the water to be sprayed at the corners of the flange 7 - i.e. in the four external spraying zones ZE in Figure 4, hatched - and uniform distribution of water on said flange 7.
  • the deflector 5 is fixed with respect to the rest of the structure of the sprayer.
  • Two upper supporting arms 8 are coupled at the centre line of two of the sides of the square flange 7, to connect the deflector 5 to the part of the upstream nozzle 4 and of the threaded connection 3;
  • two dividing crests 9 (Figure 1) are provided at the centre line of the other two sides of the square flange 7, suitable to promote diversion of the flow of liquid to be sprayed which, as will be seen in greater detail hereunder, flows on the external surface of the conical part 6, towards the corners 10 of the square flange 7.
  • the upper supporting arms 8 have, at least in the area in which they join the deflector 5, flattened cross sections, hydrodynamic in shape and oriented parallel to the direction of flow of the liquid to be sprayed on the conical projection 6 and, just as the crests 9, also provide means to divide the flow ⁇ in the present description also called second flow dividing means - suitable to contribute towards diverting the flow of liquid to be sprayed, which flows on the external surface of the conical part 6, towards the corners 10 of the square flange 7.
  • the dividing crests 9 and the flattened coupling zones of the arms 8 on the deflector 5 - i.e. the second flow dividing means 8, 9 - also promote detachment of the water from the surface of the flange 7 and facilitate delivery of the water from the sprayer fragmented in droplets instead of as a jet in sheet form.
  • a hole 11 On the top of the conical projection 6 is a hole 11, also called dividing aperture 11, which extends inferiorly, inside the conical projection 6, with a tubular extension 12, or in any case defines a tubular length of duct 12 - in the present description also indicated as "guide duct 12" - the axis of which is substantially parallel to the axis of the inlet jet incident on the deflector 5.
  • a propeller 13 Positioned under the deflector 5 is a propeller 13, with axis of rotation coaxial with the tubular guide duct 12 and suitable to distribute the liquid with predetermined uniformity over a substantially circular area, which hits said propeller and causes it to rotate.
  • the sprayer operates as follows.
  • the inlet jet of water or another liquid to be sprayed, is delivered from the upstream nozzle 4 and is incident against the top of the conical projection 6.
  • the dividing aperture 11 is opposite and coaxial with the upstream nozzle 4 and has a smaller inlet section than the outlet section of the upstream nozzle, so that only part of the flow of liquid incident on the deflector ⁇ hereinafter referred to as "first fraction of liquid to be sprayed" - enters the tubular duct 12, while the remaining part - hereinafter referred to as "second fraction of liquid to be sprayed” - flows along the sides of the conical projection 6 and is diverted by the flange 7; for this purpose, the edges 14 of the dividing aperture 11 - in the present description also referred to as dividing crest 14 - preferably have the shape of cutting edges or in any case a tapered hydrodynamic shape, in order to divide the incident flow with greater precision and less turbulence.
  • the first fraction of liquid to be sprayed enters the aperture 11 and, after passing through the tubular duct 12, is ejected against the propeller 13, causing it to rotate; among other things, the duct 12 has the function of:
  • the rotating propeller 13 distributes part of the liquid supplied to the sprayer 1 with a predetermined distribution uniformity on an area with a square surface - hatched line L1 in Figure 4 - positioned below said sprayer 1.
  • the tubular duct 12 has the function of containing, maintaining compact and guiding the flow of the first fraction of liquid to be sprayed, in order to direct it more efficaciously against the propeller 13.
  • the second fraction of liquid to be sprayed after having flowed on the external surface of the conical projection 6, reaches the flange 7 and is thrust by the second dividing means 8, 9 towards the four zones of the corners of the square flange 7, in the following description also referred to as "base extensions 10"; in this way the four base extensions 10 concentrate the flow of sprayed liquid delivered from the flange 7 at the four corners and along the diagonals of said flange 7, giving rise to four projections of the area below sprayed by the sprayer - i.e. in the aforesaid four external spraying zones ZE in Figure 4 - at the corners of the square or rectangular area to be sprayed.
  • the dash-dot lines L2 indicate the perimeter of the square area to be sprayed
  • the continuous wavy line L3 schematically indicates the boundaries of the zone effectively sprayed by the sprayer in Figure 1 with predetermined degree of uniformity.
  • the deflector 5 is suitable to spray with predetermined uniformity an area with an approximately square shape - line L3 in Figure 4 - although other embodiments not shown can also spray, with predetermined uniformity, areas of other shapes, such as rectangular, triangular, rhombic, polygonal, star-shaped; sprayed areas with similar shapes can be juxtaposed or partly overlapped with one another, arranging a plurality of sprayers according to the present invention according to a suitable network, in order to spray a wider area - for example the entire filling of a cooling tower - with greater uniformity than obtained by overlapping the circular sprayed areas obtained with prior art sprayers.
  • Another important advantage of the sprayer 1 described hereinbefore lies in the fact that the shape and dimensions of the area sprayed with substantial uniformity by the sprayer 1 remains substantially unvaried -approximately square in the example in Figures 1-4 - irrespective of variations in the supply pressure in the interval from 40 to 120 cm of the head of water: in fact, in a prior art sprayer, in which a propeller or impeller sprays water on a substantially circular spraying area, by increasing the head of water the diameter of the spraying area also increases.
  • the outlet section of the upstream nozzle 4 and the dividing aperture 11 are opposite and coaxial with each other and - as in the present embodiment, in which both have a circular section - the outlet section of the of the upstream nozzle 4 is approximately 1.3 times greater than the through section of the dividing aperture 11; in other preferred embodiments, the ratio between the outlet section D1 of the upstream nozzle 4 and the through section D2 ( Figure 2) of the dividing aperture 11 can vary from 1.2 times to 1.4 times.
  • the propeller 13 can be replace with other types of rotors or revolving bodies made to rotate by the jet of liquid which hits them, or by other types of appropriate circular spraying means, suitable to spray with the sprayed liquid and with a predetermined degree of uniformity, a circular or rounded internal spraying zone;
  • the deflector 5 can be replaced by other peripheral spraying means suitable to spray with water or another sprayed liquid an external spraying zone located around and at least partly external to the aforesaid internal spraying zone; or the deflector 5 can also be hit by several inlet jets, also coming from a plurality of upstream nozzles;
  • the deflector 5 can also be devoid of projecting parts 10, but be suitable to divert and direct the fraction of fluid which flows on the external surface of a conical projection 6 towards one or more spraying areas, on a surface to be sprayed, external to a circular or rounded internal spraying area,
  • the dividing crest 14 and the upstream nozzle 4 can be replaced by other flow dividing means, suitable to divide the flow of liquid to be sprayed which enters the sprayer in a first and a second fraction, the first fraction sent towards the circular spraying means, the second fraction sent towards the deflector 5.
  • sprayers according to the present invention can be used, for example, in purifying, irrigation or fire extinguishing systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
EP05106905.2A 2004-07-28 2005-07-27 Dispositif de pulvérisation avec une configuration de jet non circulaire Active EP1621841B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20041530 ITMI20041530A1 (it) 2004-07-28 2004-07-28 Spruzzatore per irrorare zone anche non circolari

Publications (2)

Publication Number Publication Date
EP1621841A1 true EP1621841A1 (fr) 2006-02-01
EP1621841B1 EP1621841B1 (fr) 2015-07-08

Family

ID=35169379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05106905.2A Active EP1621841B1 (fr) 2004-07-28 2005-07-27 Dispositif de pulvérisation avec une configuration de jet non circulaire

Country Status (3)

Country Link
EP (1) EP1621841B1 (fr)
ES (1) ES2548721T3 (fr)
IT (1) ITMI20041530A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103994690A (zh) * 2014-06-05 2014-08-20 张韦欣 旋转式喷溅装置
CN104215116A (zh) * 2014-09-26 2014-12-17 四川省君源科技发展有限公司 冷却塔旋转式节能喷淋装置
CN105973059A (zh) * 2016-05-05 2016-09-28 潘泉方 水能反溅喷雾喷头

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2005600A (en) * 1932-07-28 1935-06-18 Cooling Tower Co Inc Distributor nozzle
US3061204A (en) * 1961-03-30 1962-10-30 Fluor Corp Water spray nozzle
US4091873A (en) * 1977-02-17 1978-05-30 Werner Clements M Fire extinguishant dispensing nozzles
US4350302A (en) * 1980-09-19 1982-09-21 Zurn Industries, Inc. Liquid spray nozzle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2005600A (en) * 1932-07-28 1935-06-18 Cooling Tower Co Inc Distributor nozzle
US3061204A (en) * 1961-03-30 1962-10-30 Fluor Corp Water spray nozzle
US4091873A (en) * 1977-02-17 1978-05-30 Werner Clements M Fire extinguishant dispensing nozzles
US4350302A (en) * 1980-09-19 1982-09-21 Zurn Industries, Inc. Liquid spray nozzle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103994690A (zh) * 2014-06-05 2014-08-20 张韦欣 旋转式喷溅装置
CN103994690B (zh) * 2014-06-05 2015-12-02 张韦欣 旋转式喷溅装置
CN104215116A (zh) * 2014-09-26 2014-12-17 四川省君源科技发展有限公司 冷却塔旋转式节能喷淋装置
CN104215116B (zh) * 2014-09-26 2016-10-19 四川省君源塑料制品有限公司 冷却塔旋转式节能喷淋装置
CN105973059A (zh) * 2016-05-05 2016-09-28 潘泉方 水能反溅喷雾喷头

Also Published As

Publication number Publication date
ES2548721T3 (es) 2015-10-20
EP1621841B1 (fr) 2015-07-08
ITMI20041530A1 (it) 2004-10-28

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