EP3650793A1 - Procédé et dispositif de nettoyage de refroidisseurs d'air - Google Patents

Procédé et dispositif de nettoyage de refroidisseurs d'air Download PDF

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Publication number
EP3650793A1
EP3650793A1 EP19207651.1A EP19207651A EP3650793A1 EP 3650793 A1 EP3650793 A1 EP 3650793A1 EP 19207651 A EP19207651 A EP 19207651A EP 3650793 A1 EP3650793 A1 EP 3650793A1
Authority
EP
European Patent Office
Prior art keywords
parallel
nozzle bar
layer
air cooler
pipes
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.)
Pending
Application number
EP19207651.1A
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German (de)
English (en)
Inventor
Michael Lange
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.)
BUCHEN ENERGYSERVICES GMBH
Original Assignee
Buchen KraftwerkService GmbH
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 Buchen KraftwerkService GmbH filed Critical Buchen KraftwerkService GmbH
Publication of EP3650793A1 publication Critical patent/EP3650793A1/fr
Pending legal-status Critical Current

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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
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
    • F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
    • 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

  • a large industrial plant is understood to mean plants in the chemical and in particular petrochemical industry, furthermore plants and plants in the drying and power plant industry, and e.g. understood for refineries, waste incineration plants and power plant areas.
  • Air coolers are used in such systems for the targeted cooling of fluids.
  • the temperature of these fluids can be specifically reduced by the desired amount using an air cooler.
  • the fluid to be cooled flows through more or less of the individual areas of at least one air cooler. The desired reduction is achieved quickly and specifically.
  • An example of the fluids are water, oil, steam and chemicals.
  • Such air coolers are relatively large devices. They are usually set up outdoors. They are in contact with the ambient air so they can flow through them. They are often assigned fans that provide additional flow. The cooling can also be influenced and specifically adjusted via the fans.
  • the air coolers have at least two layers, each with a large number of tubes.
  • the fluid to be cooled flows through the pipes.
  • the pipes run in a straight line.
  • the pipes of all layers run parallel to each other.
  • the tubes of a first layer which forms the surface of the air cooler, run in a first plane.
  • the tubes of a second layer underneath run in a second plane, which is parallel to the first plane.
  • a tube of the second layer is arranged on a gap between two tubes of the first layer. If a third layer is provided, this is arranged in a third plane, its tubes are each at right angles below the tubes of the first layer and thus again at a gap to the tubes of the second layer.
  • Adjacent levels are usually the same distance apart for all levels, measured perpendicular to the level. There are often three or five layers.
  • An air cooler has at least one field with two or more such layers. Often it has several fields, which are usually identical to one another. The fields are arranged in one field level. For example, there are air coolers with two fields, the two fields are arranged like a roof.
  • an air cooler which has four layers of pipes, the pipes run in a straight line and have the same length, the pipes of all layers run parallel to one another, the pipes of a first layer, which forms the surface of the air cooler, run in a first plane, the pipes of the second layer underneath run in a second plane that is parallel to the first plane, etc.
  • an air cooler which is arranged in a housing. It has two layers, each with obviously only one, probably spiraling pipe.
  • the tube of the upper layer runs in a first plane
  • the tube of the second layer below it runs in a second plane, which is parallel to the first plane.
  • the tube of the second layer is arranged on a gap between two revolutions of the tube of the first layer.
  • a ladder is attached to the carrier, on which the nozzle carriage is guided in a longitudinally displaceable manner.
  • the jet car has a motor for its movement, mostly a pneumatic motor.
  • the air cooler is cleaned in strips, for this purpose the carrier or the nozzle carriage is moved along the ladder.
  • a new Streak is then achieved by moving the nozzle carriage or carrier to a different position.
  • a disadvantage of the previously known cleaning method is that the strips each cover only a smaller part of the surface. Many movements therefore have to be carried out in order to be able to clean the entire air cooler. It is also noteworthy here that the previously known nozzle carriage has about ten nozzles. The strip width is limited by this number, for example ten nozzles.
  • the strips in which the cleaning takes place can be made much wider than before. They advantageously extend over the entire dimension of the field, so that the field only has to be run over once. However, it is advantageously run over a second time, in particular on the way back, in this case the main jet directions of the outlet nozzles are aligned parallel to a second inclined plane, which runs at the same value of its angle to the surface as the first inclined plane, but is different from the first inclined plane .
  • the invention has the advantage that the water jets are directed at the spaces between the tubes of the individual layer and not, as in the prior art, at right angles to the surface and thus essentially at the tubes. Even in fields with two layers, especially in fields with more than two layers, better cleaning of the lower pipes, i.e. the lower layers, has a positive effect.
  • This device does not require a nozzle carriage and therefore no drive for a nozzle carriage. This saves a lot of device. Operation is also easier because there is no need to move a nozzle carriage. There is no supply line for the engine of the jet car and for its control.
  • the tubes are all the same length.
  • the nozzle bar is arranged on an already existing carrier and parallel to it, preferably it also has the length of the carrier. It is assumed that the field under consideration is already set up so that the carrier can be moved across the surface of the field transversely to its longitudinal direction. If this is not the case, the invention provides a holding device for receiving the nozzle bar, which has a moving device for displacing the nozzle bar parallel to the surface of the air cooler and a rotating device for rotating the nozzle bar about its longitudinal axis, and a fastening device for the arrangement on the air cooler. The latter parts replace those devices which already exist in a field equipped with a carrier.
  • extension bar only makes the nozzle bar longer while maintaining its function. You choose a length that is slightly larger than the corresponding dimension of the field, so that the pipes are also safely cleaned at their ends.
  • the nozzle bar has an interior, it is connected to a connection end and the outlet nozzles.
  • This interior is chosen so large that the water pressure applied to each individual outlet nozzle is as constant as possible, in any case the nozzle furthest from the connection end is still at a pressure is applied, which is a maximum of 30%, preferably a maximum of 10% less than the water pressure at the connection end.
  • a tube of the second layer is arranged on a gap between two tubes of the first layer, so that each tube of the first layer and a tube of the second layer located obliquely underneath are located in first inclined planes, which are parallel to one another, and in second inclined planes located that are parallel to each other.
  • the amount of the angle at which the first inclined planes are to the surface is equal to the value of the angle at which the second inclined planes are to the surface.
  • a third layer is also present, its pipes are oriented again like the first layer and / or they are oriented such that the first and second inclined planes are continued.
  • the two inclined planes are each at an angle of 45 ° to the surface and the two types of inclined plane intersect at 90 °. If the triangle LME is an equilateral triangle, the two inclined planes each form an angle of 60 ° with the surface and the first and second inclined planes intersect at an angle of 60 °.
  • the nozzles typically have a jet angle of 15 °. For example, they are arranged at a distance of 10 cm. In this case, the individual nozzles must be arranged approx. 38 cm from the surface in order to ensure that the jets of neighboring nozzles just touch each other in the surface.
  • Figure 1 shows a section of a field of an air cooler, the field has four layers, which are layered from top to bottom.
  • the individual layers are each formed by tubes 20.
  • All tubes 20 have the same length, are straight and identical. All tubes 20 run parallel to each other, at right angles to the drawing plane in the figure.
  • the tubes 20 of a first, upper layer, which forms the surface of the air cooler, run in a first plane 22.
  • the tubes 20 of a second layer underneath run in a second plane 24.
  • the distance between the centers of adjacent tubes 20 of each level is constant, it is s.
  • the tube of the second level 24 closest to these two centers M and N lies on a gap or, in other words, between the first two tubes 20.
  • the center of the considered Pipe of the second level 24 be L.
  • the points M, N and L lie in the considered embodiment on the corner points of an equilateral triangle.
  • the center points lie on the corner points of an isosceles triangle, the same legs starting from M and N and each leading to L.
  • the triangle side ML always runs in a first inclined plane 30, the triangle side NL in a second inclined plane 32. Since the above consideration applies to practically any triangular configurations of the tubes 20 that are picked out arbitrarily (except edge regions), there are always n tubes 20 on the same inclined plane, where n the number the layers or levels. However, this does not always apply in the marginal area.
  • the first oblique plane 30 and the second oblique plane 32 intersect at an intersection angle. In the case of a right-angled, isosceles triangle, this is 90 °.
  • a nozzle bar 34 is shown diagonally above the pipes 20 shown. It consists of a tube that defines an interior 36. This is with a connection end 68 (see Figure 2 ) and a number of outlet nozzles 40 in communication.
  • a hose 42 can be detachably connected, via which water is supplied at a pressure of, for example, 100-200 bar.
  • This hose 42 is flexible.
  • the water can only escape from the interior 36 via the outlet nozzles 40.
  • These are identical in construction. They are arranged in a straight line. During operation, water emerges from them in a main jet direction 44.
  • the main jet directions 44 of all nozzles 40 lie in one plane.
  • the invention now provides that for practical use this plane is first aligned parallel to the first inclined plane 30 and in a further pass parallel to the second inclined plane 32.
  • the inclined planes 30, 32 form sets of inclined planes 30, 32, a first inclined plane 30 and a second inclined plane 32 pass through each center point of a tube 20.
  • the nozzle 40 has a clear distance D from the first plane 22, which is assumed to be the surface of the field.
  • the distance D is chosen to be significantly smaller than in reality. This has been done to keep the presentation clear.
  • a conical water jet 46 emerges from the nozzle 40.
  • the opening angle is about 14 °. If, in addition, a distance of adjacent nozzles 40 on the nozzle bar 34 of approximately 10 cm is selected, the distance which is approximately 3.5 times larger must be selected than shown.
  • Figure 1 the edge jets 48 of the water jet 46 are shown. A large proportion of the water jet does not directly hit the tubes 20 of the top, first level 22, but also reaches the tubes 20 of the lower levels.
  • the nozzle bar 34 is pivoted by 60 ° and it is now irradiated along the second inclined plane 32. The arrangement is then a mirror image of that in Figure 1 shown representation.
  • FIG. 2 a section of a field is shown. Only the tubes 20 of the upper, first level 22 are shown in order to keep the drawing simple. In a known manner, the individual tubes 20 open at the top and bottom into head pieces 50. Rails 52 are arranged thereon, via which a carrier 54 can be moved in a controlled manner in the direction of the double arrow 56. The rails 52 form at least part of a fastening device for the carrier 54.
  • a holding device 58 is arranged laterally on the carrier 54 and is composed of a lower part 60 and an upper part 62. The holding device 58 carries the nozzle bar 34. This is longer than the tubes 20, reaches into the area of the two head pieces 50.
  • the nozzle bar 34 is held so as to be pivotable about an axis 64, see rotary arrow.
  • the nozzle bar 34 is rotatably held.
  • the upper part 62 forms a rotating device.
  • the nozzle bar 34 consists of a primary nozzle bar and an extension piece 66, which is attached to the upper end of the primary nozzle bar.
  • extension piece 66 which is attached to the upper end of the primary nozzle bar.
  • the nozzle bar 34 is adapted to the length of the tubes 20 by the extension pieces 66.
  • nozzle bars 34 of different lengths can be provided, making it unnecessary, but still possible, to provide extensions.
  • the nozzle bar has a connection end 68. It is designed, for example, as a screw thread or in particular as a standard coupling for high-pressure water connections, all according to the prior art.
  • a hose 70 for the HD feed line is connected to the connection end 68. The high pressure water is supplied via it, see arrow.
  • the rotating device 62 is first operated such that the nozzles 20 are aligned parallel to the first inclined plane 30 of the field.
  • the carrier 54 By moving the carrier 54 in at least one direction of the double arrow 56, all the tubes 20 of the field are then run over.
  • the rotary device is then actuated such that the nozzles 20 are aligned parallel to the second inclined plane 32 of the field.
  • Another run over by moving follows of the carrier 54 in at least one direction of the double arrow 56. During the movements, all the tubes 20 are run over at least once, often also several times.
  • the nozzle bar 34 is, for example, a metallic tube, in particular a round tube. At its end opposite the connection end 68, it has a connecting means, for example a thread, with which either an extension piece 66 or a head piece 70 cooperates.
  • the head piece 50 closes the interior 36. If an extension piece 66 is used, a head piece 70 is also arranged at its free end. Other designs in which, for example, the nozzle bar is closed on one side are possible. In the Figures 3 and 4 the arrow indicates where water is being fed.
  • the description preferably relates to pipes and the like, which are not arranged in edge areas of the field.
  • the last pipe of a level lacks a partner on one side, so that the description "set on a gap" applies more.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cleaning In General (AREA)
EP19207651.1A 2018-11-08 2019-11-07 Procédé et dispositif de nettoyage de refroidisseurs d'air Pending EP3650793A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018127948 2018-11-08

Publications (1)

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EP3650793A1 true EP3650793A1 (fr) 2020-05-13

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EP19207651.1A Pending EP3650793A1 (fr) 2018-11-08 2019-11-07 Procédé et dispositif de nettoyage de refroidisseurs d'air

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EP (1) EP3650793A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220205745A1 (en) * 2020-12-29 2022-06-30 Johannes Stickling Air Flow Apparatus Including Cleaning Device for Cleaning an Array of Air Channels of the Air Flow Apparatus
US11408694B2 (en) * 2020-03-19 2022-08-09 Saudi Arabian Oil Company Reciprocating spray cleaning system for air-cooled heat exchangers

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1942157A1 (de) 1968-08-20 1970-02-26 Hudson Products Corp Luftgekuehlter Kondensator
DE2225915A1 (de) 1972-05-04 1973-11-15 Lummus Co Luftkuehler
EP2034266A2 (fr) * 2007-09-10 2009-03-11 J&W Reinigungssysteme GmbH Installation d'échangeur thermique dotée de surfaces inclinées ou verticales et d'un nettoyage
EP2040021A2 (fr) * 2007-09-18 2009-03-25 J&W Reinigungssysteme GmbH Dispositif de nettoyage doté d'un conduit de tuyère pour tuyaux de refroidissement
US20090314481A1 (en) 2006-07-07 2009-12-24 Edwin Poorte Heat exchanger with cooling fins
FR2955651A1 (fr) * 2010-01-25 2011-07-29 A X Services Dispositif de nettoyage de surfaces, mobile, et application particuliere pour le nettoyage des elements de refroidisseur thermique
US20140326280A1 (en) * 2011-12-28 2014-11-06 Saudi Arabian Oil Company Cleaning apparatus for heat exhange tubes of air cooled heat exchangers

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1942157A1 (de) 1968-08-20 1970-02-26 Hudson Products Corp Luftgekuehlter Kondensator
DE2225915A1 (de) 1972-05-04 1973-11-15 Lummus Co Luftkuehler
US20090314481A1 (en) 2006-07-07 2009-12-24 Edwin Poorte Heat exchanger with cooling fins
EP2034266A2 (fr) * 2007-09-10 2009-03-11 J&W Reinigungssysteme GmbH Installation d'échangeur thermique dotée de surfaces inclinées ou verticales et d'un nettoyage
EP2040021A2 (fr) * 2007-09-18 2009-03-25 J&W Reinigungssysteme GmbH Dispositif de nettoyage doté d'un conduit de tuyère pour tuyaux de refroidissement
FR2955651A1 (fr) * 2010-01-25 2011-07-29 A X Services Dispositif de nettoyage de surfaces, mobile, et application particuliere pour le nettoyage des elements de refroidisseur thermique
US20140326280A1 (en) * 2011-12-28 2014-11-06 Saudi Arabian Oil Company Cleaning apparatus for heat exhange tubes of air cooled heat exchangers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11408694B2 (en) * 2020-03-19 2022-08-09 Saudi Arabian Oil Company Reciprocating spray cleaning system for air-cooled heat exchangers
US20220205745A1 (en) * 2020-12-29 2022-06-30 Johannes Stickling Air Flow Apparatus Including Cleaning Device for Cleaning an Array of Air Channels of the Air Flow Apparatus
US11543193B2 (en) * 2020-12-29 2023-01-03 Johannes Stickling Air flow apparatus including cleaning device for cleaning an array of air channels of the air flow apparatus

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