NL2011057C2 - Heat exchanger and process to cool a gas. - Google Patents

Heat exchanger and process to cool a gas. Download PDF

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Publication number
NL2011057C2
NL2011057C2 NL2011057A NL2011057A NL2011057C2 NL 2011057 C2 NL2011057 C2 NL 2011057C2 NL 2011057 A NL2011057 A NL 2011057A NL 2011057 A NL2011057 A NL 2011057A NL 2011057 C2 NL2011057 C2 NL 2011057C2
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NL
Netherlands
Prior art keywords
heat exchanger
tubes
frame
exchanger according
brushes
Prior art date
Application number
NL2011057A
Other languages
Dutch (nl)
Inventor
Harmen Pierre Slump
Original Assignee
Geurts Internat B V
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Publication date
Application filed by Geurts Internat B V filed Critical Geurts Internat B V
Priority to NL2011057A priority Critical patent/NL2011057C2/en
Application granted granted Critical
Publication of NL2011057C2 publication Critical patent/NL2011057C2/en

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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
    • F28G1/02—Non-rotary, e.g. reciprocated, appliances having brushes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases

Description

HEAT EXCHANGER AND PROCESS TO COOL A GAS
The invention is directed to a heat exchanger comprising a plurality of parallel heat exchange tubes and a cleaning device for cleaning part of the exterior surface of the heat exchange tubes. The invention is also directed to a process to cool a flue gas using this heat exchanger.
There is a long existing need for a heat exchanger which is capable to cool a flue gas containing solid particles, such as ash and soot particles. Typically such heat exchanger comprises heat exchange tubes through which a cooling medium flows, such as water, flows. The flue gas is led along the exterior of the tubes and are cooled against water or evaporating water. A problem with such a heat exchanger is that on the exterior of the tubes solids may accumulate. Accumulation of solids is disadvantageous because it will negatively influence the heat exchange and thus the cooling capacity and in extreme situations may even block the flow of flue gas altogether.
Already in 1930 patent publication GB339806 describes a heat exchanger provided with a cleaning device to avoid solids accumulation on the surface of the tubes. This cleaning device consisted of a brush which could move along the surface of the tubes. The brush or brushes are fixed to an endless chain and guided via a system of pulleys along the tubes.
French patent FR1308703 of 1962 describes a heat exchanger wherein the exterior of the tubes is cleaned by moving a plate with openings for passage of the tubes along the length of the tubes. The plate is positioned perpendicular to the tube bundle consisting of the parallel heat exchange tubes. EP544348 describes a similar cleaning device as the above French publication. In this publication the tube bundle is supported by more than one baffle plate. The baffle plates are interconnected and moveable along the length of the tubes to be used as a cleaning device. The openings of the baffle plate may be provided with circular brushes. US2009/0188648 describes a heat exchanger having a plurality of heat exchange tubes and a cleaning device for cleaning part of the exterior surface of the heat exchange tubes. By moving the scraper plate and supplying a spray of water dust and dirt is removed from the tubes. The cleaning device is a rectangular scraper plate which is positioned perpendicular with respect to the tubes. The scraper plate comprises scraping openings which, when the scarper plate is moved along the length of the heat exchange tubes, remove dirt or dust as accumulated on the tubes. A problem with the above heat exchangers is that in time the tubes will reposition themselves relative to each other. This is caused by the high temperatures at which such an apparatus is operated at and because of small differences in the thermal expansion when the apparatus is started up and cooled down. This repositioning will in time result in that the cleaning plate of the above publications cannot move along the length of the tubes. Applicant himself has recently manufactured such an apparatus consisting of a moveable cleaning plate as in the prior art. Applicant was unsuccessful in obtaining a heat exchanger in which the cleaning plate could be operated for an extended period of time without jamming.. Another disadvantage of the prior art heat exchangers is that when the plate is jammed or when openings in the plate have to be adjusted or repaired the entire tube bundle had to be dismantled.
The present invention aims at providing a heat exchanger comprising a plurality of parallel heat exchange tubes and a cleaning device for cleaning part of the exterior surface of the heat exchange tubes which heat exchanger can be used for a prolonged period of time.
The object is achieved by the following heat exchanger. Heat exchanger comprising a plurality of parallel positioned heat exchange tubes and a cleaning device for cleaning part of the exterior surface of the heat exchange tubes, wherein the cleaning device comprises of a frame having openings for passage of the tubes, positioned perpendicular with respect to the tubes and moveable along at least part of the length of the tubes and a plurality of brushes fixed to the frame.
Applicants found that by combining a frame with brushes a cleaning device is obtained which can be moved along the tubes without the risk of jamming. This because the openings in the frame can be made large enough to avoid jamming resulting from the expected small deformation of the tubes with the tube bundle when in prolonged use. The brushes provide the cleaning function. Because brushes are used the risk of jamming is lower. Applicant found that brushes can be easily replaced without having to dismantle the frame and tube bundle.
Below the invention and its preferred embodiments will be discussed in more detail.
The heat exchanger may be provided with a plurality of elongated brushes which are fixed parallel with respect to each other on to the frame. At least part of the bristles of the brush extend to the openings in the frame and touch the heat exchange tube. Suitably a single tube is in contact with two parallel positioned brushes.
The brush may have bristles extending away from its core in a radial fashion and thereby also extending towards the bristles of the next positioned parallel brush. The length of these two facing groups of bristles compose at least 50% and suitably at least 80% of the distance between the core of the two parallel positioned brushes.
The bristles may be made of any flexible material which enables a cleaning of the exterior of the heat exchange tube on the one hand and avoids jamming of the moving frame. Preferably the material is also heat resistant, i.e. it can withstand the high temperatures which may occur at the exterior of the heat exchange tube. The bristles may have the form of flexible strips, wires, flaps or even wire mesh. A suitable material for the brush and or its bristles will depend on the application of the heat exchanger and more in particular to the temperature range in which the heat exchanger is operated. Suitable materials for the bristles are metal, polymers, glass and carbon. Suitably metal fibres are used.
In order to be able to place and replace a single brush it is beneficial that the brush has some mechanical integrity such that it can be placed by pushing the brush in its axial direction along the frame and between the tubes. A suitable brush having such mechanical integrity is a brush comprising bristles fixed between at least two twisted metal wires that define turns between which the bristles of the brush are held. Brushes with less mechanical integrity may also be used. Special measures for placing and replacing such brushes will have to be taken. Such measures may include providing the brushes with means such that the brush may be pulled into its position and from its position on the frame.
The elongated brushes are suitable replaceable. It is found beneficial that the brushes are replaceable. This because in use the bristles may wear and lose some of their cleaning capacity. By using replaceable brushes a simple method has been obtained to perform maintenance on the heat exchanger according to the invention without having to dismantle the frame and/or the heat exchange tubes.
The plurality of parallel heat exchange tubes forms a so-called tube bundle. The cross-sectional geometry of the bundle may have any form, such as circular, oval or rectangular. Preferably the geometry is rectangular because such geometry enables a simple replacement of the brushes. In such geometry the frame is suitably also rectangular.
The frame is moveable along at least part of the length of the tube. Suitably the frame is connected to a pulling and pushing means suited to move the frame along at least part of the length of the tubes. Such pulling and pushing means may be a motor or a hydraulic or pneumatic cylinder. The motor or the more preferred hydraulic or pneumatic cylinder are suitably positioned externally from the heat exchanger.
In practice there will be a maximum length of the tube along which one frame is moveable. Longer length may run the risk of jamming after a prolonged period of use. This maximum length will be dependent on the specific application, dimensions of the tubes and choice of materials and can be determined by the skilled person.
Applicants found that this maximum length may be smaller than 40 times the external diameter of the tube. When tubes having a longer length are used it is preferred that the heat exchanger comprises two or more frames. The frames are spaced away from each other along the length of the tubes and wherein each frame is moveable along at least part of the length of the tubes. In this configuration each frame will move up and down separate parts of the tubes. Suitably the frames are interconnected. The interconnected frames are suitably connected to a pulling and pushing means suited to move the interconnected frames along the length of the tubes. By using interconnected frames a shorter stroke length of the pulling and pushing means is possible as compared to a situation wherein only a single frame would have been used.
The heat exchanger may have any design known for a tube and shell heat exchanger. The heat exchanger may be provided with a inlet header fluidly the connecting the inlet of the tubes with the inlet of the heat exchanger for a cooling medium and provided with an outlet header fluidly connecting the outlet of the tubes with the outlet of the heat exchanger for used cooling medium. The tubes may have a shape of a U or a multiple U as shown in the Figures such that inlet and outlet header are positioned at one end of the tube bundle formed by the plurality of tubes and wherein the pulling and pushing means are fixed to the frame and extend to the opposite end of the tube bundle. With a multiple U design is here meant that one heat exchange tube runs from the inlet header to the outlet header in one plane and making multiple U-turns. This design is advantageous because it enables a long tube length between inlet header and outlet header and and at the same time provides a shorter length along which the frame moves along the length of the tubes. The shorter length is advantageous because it avoids strong deformations of the tubes and thus limits the risk of jamming of the frame.
Alternatively the heat exchanger may also be provided with straight tubes. Such a heat exchanger is suitably provided with an inlet header positioned at one end of the heat exchanger and fluidly the connecting the inlet of the tubes with the inlet of the heat exchanger for a cooling medium. Further the heat exchanger is provided with an outlet header positioned at the opposite end of the heat exchanger and fluidly connecting the outlet of the tubes with the outlet of the heat exchanger for used cooling medium. The tubes are straight and enclosed by a shell running from the one end of the heat exchanger to the opposite end of the heat exchanger. The one or more frames positioned in the tube bundle are connected to a pulling and pushing means which is present externally on the shell and fixed to the frame via an opening in the shell.
The heat exchanger and preferably the heat exchanger having a rectangular tube bundle may be provided with one or more openings enabling access to the frame in order to inspect and/or replace the elongated brushes.
The frame is preferably made from metal and the openings in the frame may have any form, such as circular or oval. Preferably the openings are rectangular openings. The size of the openings should be large enough to avoid jamming of the frame and will be determined by the geometry of the tube bundle.
The heat exchanger according to the present invention maybe used to cool any king of gaseous stream. Preferably it is used in a process to cool a gas having a temperature of changer between 20 and 1000 °C and having a solids content of more than 10 mg/nM^. The gas may be derived from combustion or partial combustion of a carbonaceous feed comprising ash. The carbonaceous feed may be coal, brown coal, biomass, such as wood, agricultural waste or chicken demure. The gas may also be dust laden gaseous stream which require cooling as part of the cement processes. The cooling medium flowing through the tubes may be any type of cooling medium. Typically water is used. The water may be heated and more suitably evaporated in the tubes. The obtained steam may be used for heating or more preferably to generate electricity. In the process the frame may be continuously moved along the length of the tubes or intermittently. The cleaning may even be performed when the heat exchanger is not used to cool gas. The solids removed from the tubes may be collected in special spaces and continuously or intermittently removed, for example by means of special valves or sluices.
The invention will be illustrated by making use of the following Figures.
Figure 1 is a cross-sectional top view of a possible heat exchanger according to the invention.
Figure 2 is a detail of Figure 1.
Figure 3 is a three dimensional view of the heat exchanger of Figure 1.
Figure 4 is a side view of the heat exchanger of Figure 1.
Figure 5a and 5b shows an elongated brush for use in the heat exchanger of Figure 1.
Figure 6 shows a frame provided with brushes.
Figure 7 shows a heat exchanger with multiple interconnected frames.
Figure 1 shows a heat exchanger 1 provided with a plurality of parallel heat exchange tubes of which one tube 2 is shown. A cleaning device 3 is shown for cleaning part of the exterior surface of the heat exchange tube. The cleaning device 3 is composed of a frame 4 which is moveable along the length of tube 2. Tube 2 runs from an inlet header 5 fluidly the connecting the inlet 6 of the tube 2 with the inlet 7 of the heat exchanger 1 for a cooling medium. Also shows is an outlet header 8 fluidly connecting the outlet 9 of the tube 2 with the outlet 10 of the heat exchanger for used cooling medium. Tube 2 has the design of a snake travelling from one end of the tube bundle 11 to its opposite end making multiple U turns. Fleader 5 and 8 are positioned at one end of the tube bundle 11 formed by the plurality of tubes 2. The pulling and pushing means 12 are fixed to the frame 3 and extend to the opposite end of the tube bundle 11. The pulling and pushing means 11 in Figure 1 is a hydraulic cylinder 13 positioned externally from the heat exchanger 1.
Figure 2 is a detail of Figure land shows that the frame 3 has openings 15 for passage of the tube 2. The frame 3 is positioned perpendicular with respect to the plane of tube 2 and moveable along at least part of the length of the tube 2. Figure 2 also shows the top view of a plurality of elongated brushes 16 fixed to the frame 3. The plurality of elongated brushes 16 are fixed parallel with respect to each other on the frame 3.As shown the bristles 17 of the brush 16 extend to the openings 15 in the frame 3 and touch the heat exchange tube 2.
Figure 3 shows the heat exchanger of Figurel and the reference numbers relate to the same elements of the apparatus. A removable top plate 14 is shown which may be removed when replacing the brushes 16.
Figure 4 shows a side view A of Figure 1. The open ends shown in Figure 3 and 4 are the inlet and outlet for a gas to be reduced in temperature.
Figure 5a and 5b shows a brush 16 provided with bristles 17 as seen from the side and in the along its length.
Figure 6 shows a rectangular frame 3 consisting of a bottom plate 21, a removable top plate 20 and two side plates 22 and 23. Between side plates 22 and 23 a number of parallel oriented bars 18 and 19 run on either side of the frame 3. These bars are spaced away in a vertical direction from each other to provide openings for the heat exchange tubes (not shown in Figure 6) and space away in a horizontal direction to provide a space in which brushes 16 are positioned. When brushes 18 are replaced top plate 20 can be removed and the brushes can be lifted from the frame 3. When replacing brushes 16 it is thus not required to remove frame 3 from the heat exchanger 1.
Figure 7 shows a heat exchanger 24 provided with straight tubes 25. Only one tube 25 is actually drawn along its entire length. The remaining tubes 25 only the start and the end part is shown. Tubes 25 are connected to an inlet header 26 positioned at one end of the heat exchanger 24 and an outlet header 27.
Furthermore an inlet 28 and outlet 29 of the heat exchanger for used cooling medium is shown. The tubes are straight and enclosed by a shell 30 running from the one end of the heat exchanger to the opposite end of the heat exchanger. Three interconnected frames 31,32 and 33 are shown, each frame provided with brushes 16. The frames 31, 32 and 33 are moveable along part of the length of the tubes 25. Because frames 31,32 and 33 are interconnected by bars 34 it is possible to move all three frames using a single pulling and pushing means 35. Pulling and pushing means 35 are moved by two externally positioned hydraulic cylinders 36 which are is present externally on the shell 30 and fixed to frame 31 via an opening 37 in the shell 30.

Claims (19)

1. Warmtewisselaar, die meerdere, parallel gepositioneerde, warmte-uitwisselende buizen omvat alsook een reinigingsinrichting voor het reinigen van een deel van het buitenoppervlak van de warmte-uitwisselende buizen, waarbij de reinigingsinrichting een frame omvat dat is voorzien van openingen waardoor de buizen steken, waarbij dit frame loodrecht gepositioneerd is ten opzichte van de buizen en beweegbaar is langs ten minste een deel van de lengte van de buizen, waarbij meerdere borstels bevestigd zijn op het frame.A heat exchanger comprising a plurality of heat-exchanging tubes positioned in parallel and a cleaning device for cleaning part of the outer surface of the heat-exchanging tubes, the cleaning device comprising a frame provided with openings through which the tubes protrude, wherein this frame is positioned perpendicular to the tubes and is movable along at least a portion of the length of the tubes, a plurality of brushes being mounted on the frame. 2. Warmtewisselaar volgens conclusie 1, waarbij meerdere langwerpige borstels parallel ten opzichte van elkaar bevestigd zijn op het frame, en waarbij ten minste een deel van de borstelharen van de borstel zich uitstrekt in de openingen van het frame en contact maakt met de warmte-uitwisselende buizen.A heat exchanger according to claim 1, wherein a plurality of elongated brushes are mounted parallel to each other on the frame, and wherein at least a portion of the brush bristles of the brush extend into the openings of the frame and make contact with the heat-exchanging tubes. 3. Warmtewisselaar volgens conclusie 2, waarbij een enkele buis in contact staat met twee, parallel gepositioneerde borstels.The heat exchanger according to claim 2, wherein a single tube is in contact with two parallel positioned brushes. 4. Warmtewisselaar volgens conclusie 3, waarbij een borstel in het bezit is van borstelharen die zich weg van de kern ervan uitstrekken, en dit op radiale wijze, en zich zodoende ook uitstrekken in de richting van de borstelharen van de volgende, parallel gepositioneerde borstels, waarbij de lengte van deze twee naar elkaar gerichte groepen van borstelharen ten minste 50% uitmaakt van de afstand tussen de kernen van de twee, parallel gepositioneerde borstels.A heat exchanger according to claim 3, wherein a brush has brush bristles that extend away from the core thereof, and this radially, and thus also extend in the direction of the bristles of the following, parallel-positioned brushes, wherein the length of these two groups of brush hairs facing each other makes up at least 50% of the distance between the cores of the two brushes positioned in parallel. 5. Warmtewisselaar volgens één der conclusies 1-4, waarbij de borstel is voorzien van borstelharen die bevestigd zijn tussen ten minste twee getordeerde metalen draden die bochten definiëren waartussen de borstelharen van de borstel worden vastgehouden.A heat exchanger according to any one of claims 1-4, wherein the brush is provided with bristles attached between at least two twisted metal wires defining bends between which the bristles of the brush are held. 6. Warmtewisselaar volgens conclusie 5, waarbij de borstelharen bestaan uit metaal.A heat exchanger according to claim 5, wherein the bristles are made of metal. 7. Warmtewisselaar volgens één der conclusies 1-6, waarbij de langwerpige borstels vervangbaar zijn.A heat exchanger according to any one of claims 1-6, wherein the elongated brushes are replaceable. 8. Warmtewisselaar volgens één der conclusies 1-7, waarbij de meerdere parallelle warmte-uitwisselende buizen een buizenbundel vormen, en waarbij de geometrie van de dwarsdoorsnede van de bundel rechthoekig is.A heat exchanger according to any one of claims 1-7, wherein the plurality of parallel heat-exchanging tubes form a tube bundle, and wherein the cross-sectional geometry of the bundle is rectangular. 9. Warmtewisselaar volgens conclusie 8, waarbij het frame rechthoekig is.The heat exchanger according to claim 8, wherein the frame is rectangular. 10. Warmtewisselaar volgens één der conclusies 1-9, waarbij het frame verbonden is met trek- en duwmiddelen die geschikt zijn om het frame langs ten minste een deel van de lengte van de buizen te bewegen.A heat exchanger according to any one of claims 1-9, wherein the frame is connected to pulling and pushing means suitable for moving the frame along at least a part of the length of the tubes. 11. Warmtewisselaar volgens één der conclusies 1-9, waarbij de warmtewisselaar twee of meerdere frames omvat, waarbij de frames op een onderlinge afstand zijn voorzien langs de lengte van de buizen, en waarbij elk frame beweegbaar is langs ten minste een deel van de lengte van de buizen.A heat exchanger according to any one of claims 1-9, wherein the heat exchanger comprises two or more frames, wherein the frames are provided at a mutual distance along the length of the tubes, and wherein each frame is movable along at least a part of the length of the tubes. 12. Warmtewisselaar volgens conclusie 11, waarbij de frames onderling verbonden zijn, en waarbij de onderling verbonden frames verbonden zijn met trek- en duwmiddelen die geschikt zijn om de onderling verbonden frames langs de lengte van de buizen te bewegen.A heat exchanger according to claim 11, wherein the frames are interconnected, and wherein the interconnected frames are connected to pulling and pushing means suitable for moving the interconnected frames along the length of the tubes. 13. Warmtewisselaar volgens conclusie 10 of conclusie 12, waarbij de trek- en duwmiddelen een motor of een hydraulische of pneumatische cilinder zijn die extern ten opzichte van de warmtewisselaar is voorzien.A heat exchanger according to claim 10 or claim 12, wherein the pulling and pushing means are a motor or a hydraulic or pneumatic cylinder that is provided externally with respect to the heat exchanger. 14. Warmtewisselaar volgens één der conclusies 10-13, waarbij de warmtewisselaar is voorzien van een inlaatverdeelstuk dat de inlaat van de buizen in fluïdumverbinding stelt met de inlaat van de warmtewisselaar voor een koelmiddel, en is voorzien van een uitlaatverdeelstuk dat de uitlaat van de buizen in fluïdumverbinding stelt met de uitlaat van de warmtewisselaar voor gebruikt koelmiddel, en waarbij de buizen in het bezit zijn van een U-vorm, op een zodanige wijze dat het inlaatverdeelstuk en het uitlaatverdeelstuk gepositioneerd zijn aan één einde van de buizenbundel die gevormd wordt door de meerdere buizen, en waarbij de trek- en duwmiddelen bevestigd zijn op het frame en zich uitstrekken naar het tegenovergelegen einden van de buizen.A heat exchanger according to any one of claims 10-13, wherein the heat exchanger is provided with an inlet manifold which sets the inlet of the tubes in fluid communication with the inlet of the heat exchanger for a coolant, and is provided with an outlet manifold that the outlet of the tubes is in fluid communication with the outlet of the used coolant heat exchanger, and wherein the tubes are in a U-shape in such a way that the inlet manifold and the outlet manifold are positioned at one end of the tube bundle formed by the a plurality of tubes, and wherein the pulling and pushing means are mounted on the frame and extend to the opposite ends of the tubes. 15. Warmtewisselaar volgens één der conclusies 10-13, waarbij de warmtewisselaar is voorzien van een inlaatverdeelstuk dat gepositioneerd is aan één einde van de warmtewisselaar, en een fluïdumverbinding vormt tussen de inlaat van de buizen en de inlaat van de warmtewisselaar voor een koelmiddel, waarbij een uitlaatverdeelstuk gepositioneerd is aan het tegenovergelegen einde van de warmtewisselaar, en een fluïdumverbinding vormt tussen de uitlaat van de buizen en de uitlaat van de warmtewisselaar voor gebruikt koelmiddel, waarbij de buizen recht zijn en omsloten zijn door een schaal die zich van het ene einde van de warmtewisselaar naar het andere einde van de warmtewisselaar uitstrekt, en waarbij de trek- en duwmiddelen extern aanwezig zijn ten opzichte van de schaal en op het frame bevestigd zijn via een opening in de schaal.The heat exchanger according to any of claims 10-13, wherein the heat exchanger is provided with an inlet manifold positioned at one end of the heat exchanger, and forming a fluid connection between the inlet of the tubes and the inlet of the heat exchanger for a coolant, wherein an outlet manifold is positioned at the opposite end of the heat exchanger, and forms a fluid communication between the outlet of the tubes and the outlet of the used heat exchanger outlet, the tubes being straight and enclosed by a shell extending from one end of the the heat exchanger extends to the other end of the heat exchanger, and wherein the pulling and pushing means are externally present with respect to the tray and are fixed to the frame via an opening in the tray. 16. Warmtewisselaar volgens één der conclusies 7-15, waarbij de warmtewisselaar is voorzien van één of meerdere openingen die de toegang mogelijk maken tot het frame met het oog op het uitvoeren van inspectiewerkzaamheden en/of het vervangen van de langwerpige borstels.A heat exchanger according to any one of claims 7-15, wherein the heat exchanger is provided with one or more openings that allow access to the frame for the purpose of performing inspection work and / or replacing the elongated brushes. 17. Warmtewisselaar volgens één der conclusies 1-16, waarbij de lengte van de buis langs dewelke één frame verplaatsbaar is, kleiner is dan 40 keer de externe diameter van de buis.A heat exchanger according to any one of claims 1-16, wherein the length of the tube along which one frame is displaceable is less than 40 times the external diameter of the tube. 18. Werkwijze om een gas af te koelen dat in het bezit is van een temperatuur die gelegen is tussen 20 en 1000 °C, en met een gehalte aan vaste stof dat groter is dan 10 mg/m3, door gebruik te maken van een warmtewisselaareenheid volgens één der conclusies 1-17.18. Method of cooling a gas having a temperature between 20 and 1000 ° C, and with a solid content greater than 10 mg / m3, by using a heat exchanger unit according to one of claims 1-17. 19. Werkwijze volgens conclusie 18, waarbij het gas wordt gegenereerd door de verbranding of door een gedeeltelijke verbranding van een as-bevattende koolstofhoudende voorraad brandstof.The method of claim 18, wherein the gas is generated by the combustion or by partial combustion of an ash-containing carbon-containing supply of fuel.
NL2011057A 2013-06-28 2013-06-28 Heat exchanger and process to cool a gas. NL2011057C2 (en)

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GB411792A (en) * 1934-02-13 1934-06-14 Jack Barrett Bullet-brush for the internal cleaning of tubes fitted in condensers, oil coolers, locomotive boilers and the like
DE2113419A1 (en) * 1971-03-19 1972-09-21 Siegener Ag Geisweid Device for cleaning the outside of the pipes of a hanging or standing pipe bundle of a heat exchanger
JPS5369965A (en) * 1976-12-03 1978-06-21 Nippon Kentetsu Co Ltd Dust remover
JPS6380195A (en) * 1986-09-22 1988-04-11 Ebara Corp Heat transfer tube cleaning device
EP0544348A2 (en) * 1991-11-25 1993-06-02 Norsk Hydro Technology B.V. Cleaning equipment for a heat exchanger
EP0774640A1 (en) * 1995-11-15 1997-05-21 Wehrle-Werk Ag Pipe cleaning device
DE202006010264U1 (en) * 2006-07-03 2006-09-28 Tao, Chien-Chung, Wurih Hsiang Heat exchanger used in an air conditioning unit or cooling system comprises a exchange unit, front and rear connecting plates, a moving plate, brush elements fixed in the assembly holes of the moving plate and a drive assembly
US20090188648A1 (en) * 2008-01-29 2009-07-30 Chien-Chung Tao Heat Exchanger
DE102008001518A1 (en) * 2008-04-30 2009-11-05 Hans Huber Ag Maschinen- Und Anlagenbau Effluent heat exchanger
KR20110018190A (en) * 2009-08-17 2011-02-23 정양전 Waste water heat recovery system
EP2505915A1 (en) * 2011-04-01 2012-10-03 Nooter/Eriksen s.r.l. Device and method for cleaning heat exchange finned tubes in a heat recovery steam generator

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB411792A (en) * 1934-02-13 1934-06-14 Jack Barrett Bullet-brush for the internal cleaning of tubes fitted in condensers, oil coolers, locomotive boilers and the like
DE2113419A1 (en) * 1971-03-19 1972-09-21 Siegener Ag Geisweid Device for cleaning the outside of the pipes of a hanging or standing pipe bundle of a heat exchanger
JPS5369965A (en) * 1976-12-03 1978-06-21 Nippon Kentetsu Co Ltd Dust remover
JPS6380195A (en) * 1986-09-22 1988-04-11 Ebara Corp Heat transfer tube cleaning device
EP0544348A2 (en) * 1991-11-25 1993-06-02 Norsk Hydro Technology B.V. Cleaning equipment for a heat exchanger
EP0774640A1 (en) * 1995-11-15 1997-05-21 Wehrle-Werk Ag Pipe cleaning device
DE202006010264U1 (en) * 2006-07-03 2006-09-28 Tao, Chien-Chung, Wurih Hsiang Heat exchanger used in an air conditioning unit or cooling system comprises a exchange unit, front and rear connecting plates, a moving plate, brush elements fixed in the assembly holes of the moving plate and a drive assembly
US20090188648A1 (en) * 2008-01-29 2009-07-30 Chien-Chung Tao Heat Exchanger
DE102008001518A1 (en) * 2008-04-30 2009-11-05 Hans Huber Ag Maschinen- Und Anlagenbau Effluent heat exchanger
KR20110018190A (en) * 2009-08-17 2011-02-23 정양전 Waste water heat recovery system
EP2505915A1 (en) * 2011-04-01 2012-10-03 Nooter/Eriksen s.r.l. Device and method for cleaning heat exchange finned tubes in a heat recovery steam generator

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