WO2017028959A1 - Dispositif de nettoyage destiné à des échangeurs de chaleur - Google Patents

Dispositif de nettoyage destiné à des échangeurs de chaleur Download PDF

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Publication number
WO2017028959A1
WO2017028959A1 PCT/EP2016/025085 EP2016025085W WO2017028959A1 WO 2017028959 A1 WO2017028959 A1 WO 2017028959A1 EP 2016025085 W EP2016025085 W EP 2016025085W WO 2017028959 A1 WO2017028959 A1 WO 2017028959A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
heat exchanger
cleaning device
longitudinal direction
nozzles
Prior art date
Application number
PCT/EP2016/025085
Other languages
German (de)
English (en)
Inventor
Armin Fazlollah KHADJAVI
Original Assignee
Khadjavi Armin Fazlollah
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 Khadjavi Armin Fazlollah filed Critical Khadjavi Armin Fazlollah
Publication of WO2017028959A1 publication Critical patent/WO2017028959A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
    • F28G1/166—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris from external surfaces of heat exchange conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G15/00—Details
    • F28G15/02—Supports for cleaning appliances, e.g. frames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G15/00—Details
    • F28G15/04—Feeding and driving arrangements, e.g. power operation

Definitions

  • the invention relates to a cleaning device for air-cooled heat exchangers.
  • Cleaning devices for air-cooled heat exchangers usually have a mobile frame in which a nozzle is mounted, which are equipped with a plurality of nozzles for the purpose of water spraying on the cooling surfaces of the heat exchanger.
  • the profile of the sprayed water from the nozzles is fan-shaped flat or conical.
  • the tubes to be cleaned of the heat exchangers are usually provided with cooling fins which are arranged on the circumference of the tubes.
  • the said water syringe hits the interstices of the cooling fins partially vertical. However, a part of the water syringe bounces laterally on the cooling fins, so that these, especially if created from aluminum, can be damaged.
  • DE 102010047563 A1 and DE 102011113377A1 disclose cleaning devices in the framework of which a carriage equipped with a nozzle block is arranged, which can be displaced with a drive belt along the entire length of the tubes.
  • the object of the invention is therefore to procure a simple cleaning device, which is protected against contamination and cleans the cooling fins of the heat exchanger gently. description
  • the invention relates to a cleaning device for air-cooled heat exchangers.
  • cleaning devices which are equipped with a movable ladder, which is in the horizontal direction, which is also the longitudinal direction of the heat exchanger 5 is moved.
  • the ladder serves as a support for a cleaning trolley which can be displaced along the ladder in order to clean the cooling tubes of the heat exchanger with the aid of the water nozzles integrated therein.
  • the prior art conductors may be made of aluminum to achieve low o weight.
  • the ladder is moved by a drive along the longitudinal direction of the heat exchanger.
  • the ladder is supplied with water by means of a supply hose guided along the longitudinal direction of the heat exchanger.
  • the supply hose in the prior art is connected on the one hand to an on-site water connection and on the other hand connected to a water connection belonging to the conductor.
  • This conductor water connection can also be referred to as a double adapter. Because of the compactness of the supply hose u.a. wrapped around a drum.
  • the ladder may alternatively be manually driven or pushed. o
  • the disadvantage of the manual drive is that the operator pushing the ladder with
  • Dirty water can be injected.
  • the water supply is connected to the cleaning trolley by means of another hose on the ladder.
  • the above-mentioned double adapter connects the other hose on the conductor to the supply hose.
  • the other hose must be 5 in each case after, at which point the cleaning cart is on the ladder, in full
  • the nozzle block of the cleaning cart is arranged transversely to the cooling tubes.
  • the width of the nozzle assembly results from the number of juxtaposed nozzles and the width of the water jet when it occurs on the surface to be cleaned of the heat exchanger.
  • the width of the water jet which develops only in a minimum distance between the nozzle and the surface to be cleaned, is dependent on the water pressure and the minimum distance.
  • the invention provides a cleaning device for air-cooled heat exchangers, comprising a ladder, in which at least one nozzle is integrated, which is in contrast to the displaceable cleaning trolley in the example of the prior art, pivotally or slidably mounted.
  • the mobile ladder is moved in the longitudinal direction of the heat exchanger and serves as a support for the at least one nozzle which is pivotally or slidably mounted along the ladder to oscillate using the water nozzles integrated therein, the cooling tubes and the cooling fins of the heat exchanger.
  • the ladder may be made of aluminum or composite material such as CFRP or GRP to achieve a low weight.
  • the conductor is connected to a drive e.g. an electric drive, moved along the longitudinal direction of the heat exchanger.
  • a drive e.g. an electric drive
  • the ladder is supplied with water by means of a supply hose guided along the longitudinal direction of the heat exchanger.
  • the ladder can also be driven manually or pushed.
  • the water supply is connected by means of another short, flexible hose on the ladder to the nozzle.
  • the short version of the further tube, short tube has the advantage that it bridges only a short distance of the oscillating movement and does not extend along a long distance and must be folded. Any hose clamps are thereby avoided.
  • the nozzle is arranged parallel to the cooling tubes and comprises at least one row of nozzles, which are placed along the nozzle.
  • the nozzle has only a row of nozzles placed along the nozzle.
  • the oscillation amplitude is determined by the distance of the nozzles to each other. That is, the length to be cleaned by a single nozzle is traversed in a single oscillating motion must be at least as long as the distance of the two consecutive nozzles.
  • the fan-like, flat jet of water exiting a nozzle is arranged parallel to the cooling fins of the cooling tubes, so that the contamination between the cooling fins can be cleaned without damaging the fins.
  • the width of the strip surface of the heat exchanger to be cleaned corresponds to the width of the water jet occurring on the surface.
  • the width of the water jet which develops only in a minimum distance between the nozzle and the surface to be cleaned, is dependent on the water pressure and the minimum distance. With an extension of the distance, the width of the water jet increases, but the impact energy of the water is reduced.
  • the exit angle plays an important role in determining the impact energy and also in water consumption. With a larger exit angle, water consumption can be reduced while simultaneously reducing impact energy. A larger exit angle can advantageously be used for contamination without gluing or with a low bond. By contrast, in the case of stubborn and sticky soiling, understandably higher impact energy and a smaller exit angle must be provided.
  • the waterjet exit angle has an impact on water consumption and impact energy.
  • the nozzle has only a row of nozzles that are placed along the nozzle, the exit angle of the nozzle is between about 10 ° and 90 °.
  • a nozzle with an exit angle between about 30 ° and 45 ° and a water pressure of about 40 to 60
  • the angle 30 ° is suitable for sticky and hard dirt and the angle 45 ° for easier removal of dirt.
  • the driving patterns of the nozzle block may look different.
  • the driving pattern can be programmed in a control system of the cleaning device.
  • the nozzle can oscillate once along the ladder and drive the oscillation amplitude from top to bottom and clean by means of its nozzles, which are arranged along the ladder, the cooling tubes and the cooling fins of the heat exchanger. Since this is an oscillation, the nozzle can again the same route but this time from the bottom to the top off. This trip can be repeated cleaning or omitted because of the water savings.
  • the ladder can be pushed forward by the width of the jet of water to allow the nozzle to do its cleaning work on the next, still dirty, strip of the heat exchanger.
  • the geometric shape of the drive pattern is rectangular.
  • Another driving pattern is a triangle pattern. That is, while the nozzle once oscillates along the ladder and drives the oscillation amplitude from top to bottom and cleans the cooling tubes and the cooling fins of the heat exchanger by means of its nozzles, which are arranged along the ladder, the ladder travels maximally by half of the water jet width front.
  • the programming of the oscillation speed and dependent ladder travel can be done in the control system as follows:
  • v velocity of conductor movement at e.g. triangle pattern
  • the oscillatory shape of the nozzle block can be sine, rectangle, sawtooth or triangle.
  • a preferred combination of the oscillation shape with the driving pattern is sine and triangle. That is, a sinusoidal oscillation shape is provided with a triangular travel pattern in the program of the control system, and thus the burden of the drives for the nozzle and the ladder is kept low.
  • the conductors can be moved continuously and at a constant speed and the oscillation of the nozzle assembly can be a continuous circular oscillation.
  • Velocity of the conductor v depends on SB width of the water jet.
  • the nozzle has only a number of nozzles
  • the width of the total water jet can be increased by the juxtaposition of a number N of nozzles, transverse to the conductor longitudinal axis.
  • the nozzles of the nozzle assembly may be subdivided into subregions, so that a rotatesfunktionalther is guaranteed with the maintenance of the minimum pressure.
  • the water supply of the individual sections can be ensured by means of controllable valves or manually operated valves.
  • FIG. 1 is a schematic, perspective view of an air-cooled heat exchanger with a cleaning device
  • FIG. 2 is a schematic side view of a cleaning device for air-cooled heat exchanger with pivotally mounted nozzle
  • 25 is a schematic side view of a cleaning device for air-cooled heat exchangers with displaceably mounted nozzle
  • Fig. 4 is a schematic representation of a nozzle with the jet profile.
  • the cleaning device 1 for cleaning an air-cooled heat exchanger 1000 comprises a conductor 70, which is designed as a frame for receiving further components of the cleaning device and has at least one nozzle 10.
  • the conductor 70 is movably arranged on the rails 80 along the longitudinal direction X of the heat exchanger 1000.
  • the at least one nozzle assembly 10 is integrated in the conductor 70 and mounted oscillatingly or displaceably along the longitudinal direction Y of the conductors 70.
  • the distance SL between the nozzle 20 and the surface to be cleaned of the heat exchanger 1000 changes depending on the pivot angle ⁇ , the deflection angle of the pivot arm 30 is.
  • a distance change ASL of 10% is permissible.
  • the maximum amplitude for a given pivot arm 30 is predetermined.
  • amplitude equal to 20%> to 25% of the swivel arm 30 is recommended. If the limited available amount of water is taken into account, there is a tendency for longer amplitudes L, which is discouraged here. Instead, a small amplitude L with more nozzles 20 is preferred. As will be described later, because of the limited amount of water available then a nozzle 10, which is subdivided into sections, are used.
  • amplitude L 100, 200, 300, 400, 500, 600, 700, 800 or 900 mm may also be considered.
  • the cleaning device 1 for cleaning the air-cooled heat exchanger 1000 which comprises a air-cooled condenser, a liquid cooler or a gas cooler with cooling tubes and cooling fins,
  • a conductor 70 which is manually or by means of a drive means 81 driven on guide rails 80 along the longitudinal direction X of the entire surface of the heat exchanger 1000,
  • the nozzle 10 includes a plurality of nozzles 20 arranged along the nozzle 10 or in addition transversely to the nozzle longitudinal direction Y.
  • flushing medium is water for spraying or air for blowing
  • the flushing medium can be flowed into the nozzle 10 by means of at least one supply port 21, wherein the at least one nozzle 10 with the head 70th articulated and pivotally mounted by means of a pivot arm 30 in the longitudinal direction Y of the cooling tubes over the cooling fins of the heat exchanger 1000 and is driven to oscillate by means of a drive means 40.
  • the cleaning device differs from the cleaning device.
  • the at least one nozzle 10 is slidably mounted with the ladder 70 by means of a sliding bearing 31 in the longitudinal direction Y of the cooling tubes on the cooling fins of the heat exchanger 1000 and driven by means of a drive means 40 oscillating.
  • Fig. 4 shows the nozzle 20 with a jet profile 22 which is fan-shaped and flat and has an exit angle, a jet profile width SB and a jet profile length SL.
  • the nozzle 10 has only one row of nozzles 20 which are placed along the nozzle, wherein the exit angle ⁇ of the nozzles between about
  • a nozzle 20 with an exit angle ⁇ between about 30 ° and 45 ° and a water pressure of about 40 to 60 bar can be selected.
  • the pre-programmed driving patterns of the nozzle block can be different.
  • One possible driving pattern is rectangle.
  • the nozzle 10 can oscillate once along the 5 conductors 70 and drive the oscillation amplitude L from top to bottom and clean by means of its nozzles 20, which are arranged along the conductors 70, the cooling tubes of the heat exchanger 1000 (the oscillation can also from bottom to started above). Since this is an oscillation, the nozzle 10 can again run the same distance L this time from bottom to top. During this trip, o can be re-cleaned or skipped.
  • the ladder 70 can be slid forward along the width SB of the water jet 22, along X, for the nozzle 10 to perform its cleaning work on the next, still soiled, strip of the heat exchanger 1000.
  • the geometric shape of the driving pattern is rectangular.
  • Another driving pattern is triangular pattern. That is, while the nozzle 10 is oscillating once along the conductor 70 and driving the oscillation amplitude L from top to bottom and cleans the cooling tubes of the heat exchanger 1000 by means of its nozzles 20, which are arranged along the conductors 70, the conductor 70 moves to the maximum Half of the water jet width 22 forward.
  • the programming of the oscillation speed 5 and dependent ladder travel can be considered in the control system as follows:
  • the oscillatory shape of the nozzle block 10 may be sine, rectangle, sawtooth or triangle.
  • the realization of the geometric driving patterns can be explained by an exemplary course of movement of a nozzle 20 on the XY plane based on a speed pattern.
  • the conductors 70 move at a constant velocity in the X direction and the nozzle 10 moves at a constant velocity in the Y direction, then there will be a linear geometric travel pattern of a nozzle 20 on the XY plane.
  • the movement of the nozzle 10 is oscillating. That is, the nozzle 10 must come to rest in the Y direction after the length L has been traversed, before returning in the same direction.
  • both the conductors 70 and the nozzle assembly 10 are each moved at a constant speed and driven only at the turning points with a sinusoidal velocity profile.
  • a rectangular driving pattern results when the conductor 70 does not move and only the nozzle 10 travels the length L in the Y direction and then rests at the point of inflection while the conductor 70 continues again by the length SB of the jet profile width in the X direction.
  • the first and the last surface strip of the heat exchanger 1000 to be cleaned must be cleaned with the rectangular drive pattern, so that thorough cleaning is ensured.
  • the cleaning time of the entire heat exchanger depends on the speed of the conductor v.
  • the velocity of the conductors v is dependent on the width of the water jet SB.
  • the nozzle 10 has only one row of nozzles 20.
  • the width of the total water jet can be increased by the juxtaposition of a number N of nozzles, transverse to the longitudinal axis of the conductor.
  • Another aspect to consider is the limited available water volume and the maintenance of a minimum pressure, which are considered necessary factors for the useful water supply and the maximum number of simultaneously in use nozzles 20 predetermined and possibly keep accordingly short.
  • the nozzles 20 of the nozzle 10 can be divided into sections 10A, 10B and 10C, so that a satisfactory cleaning is guaranteed with a minimum pressure.
  • 3 subareas have been proposed. If necessary, the subdivision into subareas can be even more numerous.
  • the water supply of the individual subregions 10A, 10B and 10C can be ensured by means of controllable valves or by means of manually operated valves (not shown here).
  • the ladder 70 may be made of aluminum, fiberglass or CFRP to a
  • the conductor 70 can be a lightweight design such as obtained as a truss. To avoid unwanted vibration effects, you can make additional additional storage.
  • additional pivot arms 30 or in the embodiment of FIG. 3 additional sliding bearing 31 can be installed.
  • the cleaning device 1 has at least one nozzle assembly 10 with at least one supply connection 21 and at least one supply hose 26 which is arranged to be trackable along the guide rail 80.
  • the nozzle 10 is connected via the supply port 21 and by means of a flexible short tube 27 and the conductor 70 to the supply hose 26 via a double adapter and thus the nozzles 20 are supplied with pressurized water.
  • the ladder 70 has two nozzle sticks 10 (not shown).
  • One of the nozzles 10 for spraying water and the other nozzle 10 for blowing air are suitable.
  • the water consumption can be reduced.
  • the water consumption or water saving is an important aspect, which is why in a water-saving embodiment of the cleaning device 1, the outflow of the flushing medium at each nozzle 20 or row of nozzles is made controllable by means of sensors and locking devices. Thus, locations of the heat exchanger 1000, which have no cooling function, can be run over dry.
  • a collecting tank (not shown) under the heat exchanger 1000 to be cleaned can collect the dirty water for processing purposes.
  • N Number of nozzles, transverse to the longitudinal direction of the nozzle

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

L'invention concerne un dispositif de nettoyage (1) pour le nettoyage d'un échangeur de chaleur (1000) à refroidissement par air, qui est un condensateur à refroidissement par air, un refroidisseur de liquide ou un refroidisseur de gaz pourvu de tubes de refroidissement et de nervures de refroidissement. Le dispositif de nettoyage selon l'invention comprend : un conducteur (70), qui peut être entraîné manuellement ou au moyen d'un moyen d'entraînement (81) sur des rails de guidage (80) le long de la direction longitudinale (X) de l'ensemble de la surface de l'échangeur de chaleur (1000); au moins un porte-buse (10), qui est monté dans le conducteur (70) de manière articulée ou de manière à pouvoir être coulissé dans la direction longitudinale des tubes de refroidissement (Y), au-dessus des nervures de refroidissement de l'échangeur de chaleur (1000). Le porte-buse (10) comprend une pluralité de buses (20), qui sont disposées le long du porte-buse (10) ou, en supplément, de manière transversale par rapport à la direction longitudinale de porte-buse (Y) et qui sont adaptées pour faire sortir le flux d'un milieu de rinçage. Le milieu de rinçage est de l'eau à asperger ou de l'air à souffler. Le flux du milieu de rinçage peut être injecté dans le porte-buse (10) au moyen au moins d'un raccord d'alimentation (21). Le ou les porte-buses (10) sont montés avec le conducteur (70) de manière articulée ou de manière à pouvoir être coulissés dans la direction longitudinale (Y) des tubes de refroidissement, au-dessus des nervures de refroidissement de l'échangeur de chaleur (1000) et sont déplacés en un mouvement oscillant.
PCT/EP2016/025085 2015-08-14 2016-08-08 Dispositif de nettoyage destiné à des échangeurs de chaleur WO2017028959A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015010623.6 2015-08-14
DE102015010623.6A DE102015010623B4 (de) 2015-08-14 2015-08-14 Reinigungsvorrichtung und Verfahren zur Reinigung für luftgekühlte Wärmetauscher

Publications (1)

Publication Number Publication Date
WO2017028959A1 true WO2017028959A1 (fr) 2017-02-23

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PCT/EP2016/025085 WO2017028959A1 (fr) 2015-08-14 2016-08-08 Dispositif de nettoyage destiné à des échangeurs de chaleur

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DE (1) DE102015010623B4 (fr)
WO (1) WO2017028959A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3705833A1 (fr) * 2019-03-05 2020-09-09 Hamilton Sundstrand Corporation Tube de pulvérisation d'échangeur de chaleur
CN114279261A (zh) * 2022-01-04 2022-04-05 国家能源集团国源电力有限公司 一种空冷表面式换热器清洗系统及清洗方法
FR3124249A1 (fr) * 2021-06-16 2022-12-23 A X System Dispositif de nettoyage à profilé de guidage renforcé

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011078916A2 (fr) * 2009-11-03 2011-06-30 Westinghouse Electric Company Llc Dispositif de lance miniature pour l'élimination de boues
DE102012110311A1 (de) * 2011-10-30 2013-05-02 Jnw Cleaningsolutions Gmbh Reinigungsvorrichtung für Wärmetauscher mit Leitern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008011514U1 (de) * 2008-08-29 2008-11-20 Clyde Bergemann Gmbh Reinigungsvorrichtung für eine Verbrennungsanlage
EP2317274A3 (fr) 2009-10-19 2012-06-13 JNW CleaningSolutions GmbH Dispositif de nettoyage pour échangeurs thermiques, avec une échelle
DE102011113377A1 (de) 2011-09-16 2013-03-21 Jnw Cleaningsolutions Gmbh Reinigungsvorrichtung für Wärmetauscher mit Schlauchführung
DE102013007062A1 (de) * 2012-09-13 2014-03-13 Innotech Gmbh Düsen für eine Reinigungsvorrichtung
DE102014201280A1 (de) * 2014-01-24 2015-07-30 Gebrüder Lödige Maschinenbau GmbH Kälteanlage mit einem luftgekühlten Wärmetauscher

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011078916A2 (fr) * 2009-11-03 2011-06-30 Westinghouse Electric Company Llc Dispositif de lance miniature pour l'élimination de boues
DE102012110311A1 (de) * 2011-10-30 2013-05-02 Jnw Cleaningsolutions Gmbh Reinigungsvorrichtung für Wärmetauscher mit Leitern

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3705833A1 (fr) * 2019-03-05 2020-09-09 Hamilton Sundstrand Corporation Tube de pulvérisation d'échangeur de chaleur
US11105569B2 (en) 2019-03-05 2021-08-31 Hamilton Sundstrand Corporation Heat exchanger spray tube
FR3124249A1 (fr) * 2021-06-16 2022-12-23 A X System Dispositif de nettoyage à profilé de guidage renforcé
US11958086B2 (en) 2021-06-16 2024-04-16 A X System Cleaning device with a reinforced guide profile
CN114279261A (zh) * 2022-01-04 2022-04-05 国家能源集团国源电力有限公司 一种空冷表面式换热器清洗系统及清洗方法

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DE102015010623A1 (de) 2017-03-02

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