EP0023937B1 - Russbläservorrichtung - Google Patents

Russbläservorrichtung Download PDF

Info

Publication number
EP0023937B1
EP0023937B1 EP79301627A EP79301627A EP0023937B1 EP 0023937 B1 EP0023937 B1 EP 0023937B1 EP 79301627 A EP79301627 A EP 79301627A EP 79301627 A EP79301627 A EP 79301627A EP 0023937 B1 EP0023937 B1 EP 0023937B1
Authority
EP
European Patent Office
Prior art keywords
lance
housing
aperture
carriage
steam
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.)
Expired
Application number
EP79301627A
Other languages
English (en)
French (fr)
Other versions
EP0023937A1 (de
Inventor
Herb Michelson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP79301627A priority Critical patent/EP0023937B1/de
Priority to DE7979301627T priority patent/DE2967085D1/de
Publication of EP0023937A1 publication Critical patent/EP0023937A1/de
Application granted granted Critical
Publication of EP0023937B1 publication Critical patent/EP0023937B1/de
Expired legal-status Critical Current

Links

Images

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
    • F28G15/00—Details
    • F28G15/04—Feeding and driving arrangements, e.g. power operation
    • 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
    • F28G3/00—Rotary appliances
    • F28G3/16—Rotary appliances using jets of fluid for removing debris
    • F28G3/166—Rotary appliances using jets of fluid for removing debris from external surfaces of heat exchange conduits

Definitions

  • This invention relates to cleaning systems for use in removing deposits of soot, dirt and debris from the surfaces of heat exchange tubes used in connection with furnaces or boilers.
  • the heat exchange tubes are customarily provided in banks or clusters.
  • the hot combustion gases in the boiler or furnace pass over these banks of tubes which absorb the heat therefrom and thus heat the contents of each tube in the usual heat exchange function.
  • the exterior of the tubes collect dust or soot emitting from the combustion zone of the furnace or boiler which makes the tubes less effective as heat exchange units unless thoroughly cleansed from time to time.
  • soot blower There are in the main two known types of soot blower in commercial use.
  • a tube which is rigidly secured to the housing containing the tube banks to extend permanently across the full width of the tube banks.
  • the lance is provided with fluid emission openings or nozzles arranged thereover at pre-determined spaced distances.
  • High pressure steam is introduced into the lance and this steam emits through the various nozzles and jets of steam impinge on the tubes to blow away the soot, dust and other debris.
  • Drive means disposed exteriorly of the housing rotate the lance continuously through successive 360° cycles so as to blow the soot and debris away in a complete circle around the lance.
  • soot blower has various disadvantages: It has been found that the soot blowing range of any one lance is very limited because the steam velocity decreases rapidly as it leaves each nozzle. Thus a pluraliity of the lances must be mounted in proximity to each other at respective soot blowing stations along the length of the banks of tubes which is a relatively costly arrangement. In addition, the lances remain interiorly of the housing carrying the banks of tubes when not in use. Thus the lances are exposed to the condition or atmosphere of the hot corrosive flue gases at all times, which causes the lances to deteriorate and necessitates eventual replacement of the lances or use of an expensive corrosion resistant alloy.
  • the lances are multi-nozzled.
  • nozzles are provided every 200 to 300 mm. along the length of each lance in order to assure its effectiveness.
  • this system is used in extremely wide furnaces, many nozzles are required. It has been found that in order to be effective, each nozzle must pass steam at a rate of thousands of pounds an hour to provide a high momentum needed to effectively clean the banks of tubes. Given the number of steam nozzles required per lance, it is necessary to install an expensive steam generator because of the high capacity required simultaneously for all the nozzles. Since soot blowing is carried out for a small fraction of the time that the boiler or furnace operates, such expensive steam generator is idle most of the time.
  • soot blower in current commercial use is one which also employs a lance mounted at a fixed location on the housing for the tube banks but in which the lance is slidably supported in a stationary casing so as to be insertable and retractable, within an aperture in the housing by rotation of a threaded guide engaging a nut attached to a rear portion of the lance.
  • a soot blower is described in U.S. Patent No. 2,696,016.
  • the lance which has two opposed nozzles at its terminus, rotates continuously through successive 360° cycles while it is being advanced across the entire width of the tube banks.
  • a reversing mechanism is provided to retract the lance after it reaches the end of its forward travel and it is brought back to a position outside the housing containing the tube banks.
  • the aforesaid soot blower still has certain disadvantages.
  • a plurality of lances insertable into the housing through apertures at respective soot blowing stations at pre-determined spaced intervals along the length of the tube banks are required because the effective area which may be cleaned by each lance is quite limited extending only to about a 3 or 4 foot radius (0.9 or 1.2 m).
  • the soot blower of the present invention overcomes this problem and presents a system which requires only a minimum amount of parts while nonetheless effectively cleaning the surfaces of the tube banks in an extremely efficient manner.
  • a soot blowing system for cleaning banks of tubes or the like disposed in a housing having apertures, the system comprising a movable carriage located externally of the housing for moving a lance mounted on said carriage, drive means operable for displacing the lance axially within a respective aperture in the housing and for rotating the lance within the respective aperture, and means for connecting the lance to a fluid supply whereby fluid under pressure may be passed through at least one fluid emission opening in the lance, characterised by said carriage being movable between a selected plurality of the apertures in the housing, by additional drive means operable for moving the carriage between said selected plurality of the apertures, and by control means arranged to operate sequentially the additional drive means to move the carriage automatically from one selected aperture and to stop the carriage automatically at the next,selected aperture and the first drive means to automatically insert the lance into and move the lance within each selected aperture and to automatically withdraw the lance from each selected aperture.
  • the present invention provides an automatic soot blowing system in which only a single lance is employed, this lance being controlled automatically for movement to each of a plurality of soot blowing stations and movement within apertures in the heat exchange tube housing at each of these stations.
  • the embodiments of the present invention described below feature a step by step sequential cleansing operation in which a flexible hose is employed for the supply of fluid.
  • the lance of these embodiments may have only two opposed fluid emission openings or nozzles and thus requires only a low steam generating capacity for cleansing purposes with the consequent large saving in steam generation capacity.
  • the lance does not rotate or turn in any way while travelling into and advancing within a particular aperture and steam cleaning an area of each tube bank above and below the lance.
  • the lance is rotated between approximately 5° and approximately 20° and is then gradually retracted while continuing to emit steam for cleansing purposes during its retraction.
  • the flexible hose to which the lance is attached is also rotated between 5° and 20° in this step.
  • areas covered by arcs between 5° and 20° on the tube banks above and below the lance have been cleansed.
  • the lance is rotated or twisted an additional 5° to 20° in which position it advances again into the housing and steam continues to be emitted through the nozzles for cleansing an additional area.
  • the lance makes an additional 5° to 20° rotation or twist and is retracted with steam emitting therefrom for cleansing thoroughly further arcuate areas.
  • the lance is completely removed from the housing and the steam is shut off.
  • the carriage utilised in the present invention then moves the lance to the next station. While the lance and attached hose may be returned to the original "untwisted" condition before entering the next aperture, it is preferable that the lance and the hose remain in the "twisted” condition upon entering the next aperture and then be rotated in a reverse direction in sequential increments of about 5° to 20° as aforesaid so that the flexible tube to which the lance is attached untwists and finishes the second cycle in the straightened condition that it was in at the outset of the previous cycle.
  • the lance enters the housing containing the tube banks at a first station but does not travel immediately to the far side of the tube banks. Instead, the lance enters the housing a relatively short pre-determined distance equivalent to the length of the arc of 5° to 20° set forth above with its nozzles facing substantially horizontally. The travel of the lance is stopped and the lance is turned or twisted over an arc up to 180°. The nozzles thus emit steam over a segment of the tube banks around the lance. The lance is then moved forward another pre-determined increment also equivalent to the length of the aforesaid arc of from 5° to 20° and turned or twisted in a direction reverse to that of the previous turn or twist above described.
  • inventions of the present invention utilise sequential steps of slightly different form to accomplish cleaning.
  • the relatively rigid lance utilises a flexible hose attached thereto, as by a clamp or other attaching means, for the supply of steam and the overall 180° twist required for each cycle in the cleaning operation can be accommodated by the flexible hose without the requirement of any seal. This twist in no way blocks the passage in the hose.
  • the aforedescribed cycles can be continued in each embodiment throughout the entire length of tube bank until cleaning of the entire tube bank is accomplished.
  • nozzles While two nozzles are employed in connection with these embodiments of the invention, a greater number may be utilised, or only one may be used with the lance rotating through 360° in total.
  • a housing 10 through which hot flue or exhaust gases flow.
  • This housing may be the furnace housing or it can be located in an area adjacent thereto for heat exchange purposes as is well-known in the art.
  • Tubes 11 are disposed within the housing 10 and are distributed in banks 12.
  • the tubes 11 become covered with soot and other debris as a result of combustion in the furnace when in use. This soot and debris provides undesirable insulating cover and detracts from the conventional heat exchange function of the tubes.
  • the system of the invention provides relatively inexpensive means for cleaning the tubes and removing the deposited soot and other debris to permit the tubes to function effectively.
  • the system in accordance with the invention comprises a movable carriage 17 disposed outside the housing 10 adjacent a wall 14 thereof separating a compartment 15 containing the system from the interior of the housing 10.
  • the system 13 comprises a track 16 which carries the movable carriage 17 having wheels 18 riding on the track 16.
  • a lance 19 Secured to the upper part of the carriage is a lance 19 which travels with the carriage along the track 16 to pre-determined desired positions of respective soot blowing stations. These positions in each instance are aligned with one of a plurality of apertures 20, 20a, etc. in the wall 14 of the furnace or flue housing 10.
  • the apertures make accessible the banks of tubes 11 disposed within the housing.
  • the carriage 17 comes to a stop and the lance 19 is automatically thrust through the aperture 20 into the interior of the furnace or flue housing 10.
  • the lance 19 is inserted into the housing through the aperture in the direction of the arrow shown in Fig. 3.
  • the lance is substantially hollow and, as hereinafter set forth, is at pre-determined times filled with steam under pressure through a flexible steam hose 21.
  • the lance 19 is directly connected to the flexible steam hose 21 by means of a clamp 22. While a clamp has been illustrated, it is to be understood that any suitable means for affixing the steam hose to the lance is within the purview of this disclosure. There is no extraneous or separate seal required between the lance 19 and the flexible hose 21.
  • the lance 19 is preferably provided near its terminal end with two diametrically opposed fluid emission openings 23 and 24.
  • the steam hose 21 is connected to a condensation hose ending in steam trap 25 to prevent condensation from entering the furnace which could cause damage to the housing 10.
  • each tube bank 12 which is cleaned amounts to an area which is covered by an arc of from almost 5° to 20° from the respective opening 23 and 24.
  • the lance When the lance reaches approximately the side of the housing 10 opposite the aperture 20, it is atuomatically twisted approximately 5° to 20° in the direction of the arrow shown in Fig. 4 while steam is still constantly being emited from the openings 23 and 24.
  • the hose twists as the lance rotates.
  • the lance is then in position for retraction and automatically begins the return while cleansing the ares of the tube banks 12 adjacent the heretofore serviced area described with relation to the first pass. This operation effects cleansing an additional area covered by an arc between 5° to 20°.
  • the retraction of the lance 19 is automatically terminated prior to the time when the fluid emitting openings 23 and 24 reach aperture 20.
  • the lance is again automatically stopped and rotated an additional 5° to 20° in the same direction as previously.
  • Forward movement of the lance in the direction of the arrow shown in Fig. 3 is again resumed thereby cleaning an additional area of each tube bank covered by an arc of from 5° to 20° from each opening 23 and 24 by steam which is continuously emitting through these openings.
  • the lance is totally withdrawn from the respective aperture 20 at which time a hinged door 26 closes the aperture to prevent the flow of gases in and out of the housing 10 and the supply of steam to the lance is automatically discontinued.
  • the carriage 17 is then automatically moved along the track to the next adjacent aperture 20a where an automatic stop terminates movement of the carriage 17.
  • the lance is automatically reinserted into this next adjacent aperture 20a and the cleansing operation is continued.
  • the operative sequence does not follow the dia- gramatic arrangement set forth in Fig. 5 but instead reverses the turning direction.
  • the 5° to 20° increments in rotation of the lance are in a direction opposite to the direction or rotation set forth with regard to the first cycle and thus opposite to the direction of the arrows in Fig. 5.
  • the steam hose 21 attached to the lance for its steam supply is untwisted and returns to its normal straight condition.
  • the hose need never be twisted through more than approximately 180° while nevertheless accomplishing all of the desired cleansing of the tube banks in sequential steps entering each housing aperture in turn.
  • the aforesaid arrangement completely prevents any blockage of the passage of steam which might result from any over-tisting of the supply hose during rotation of the lance.
  • the 180° twist can be easily accomplished with little stress or strain on the steam hose supply.
  • the steam emitting sequence of the lance can be so timed that steam is emitted only when heat exchange tubes are in the path of the fluid openings of the lance.
  • the lance need not be removed from aperture 20 and inserted in the next aperture 20a before it is rotated to untwist the steam hose 21.
  • the lance may be automatically rotated in a direction opposite to that of the incremental rotation shown in Fig. 5 so that the hose is untwisted and straightened before it enters aperture 20a.
  • the lance can again rotate in the incremental steps shown in Fig. 5 or alternatively rotate incrementally in the opposite direction.
  • the lance may have a single such opening and be rotated over 360° in the described 5° to 20° increments as such rotation will not twist the elongate steam hose 21 in such fashion as to prevent it from properly functioning.
  • the sequential steps described above would be repeated. However, the lance would pass through a total of 360° with the steam being emitted when necessary to clean the tube banks in the path of the lance opening or whenever desired.
  • FIG. 6 shows the lance inserted into the aperture 20 in the wall 14 of the housing 10.
  • the lance is carried by the same carriage 17 riding on tracks and has the same steam hose arrangement as in the embodiment illustrated in Figs. 1 and 2.
  • the lance 19 is inserted into the housing 10 to a lesser extent in the first portion of the cycle than is the case in the cycle of Figs. 3-5.
  • the initial advance is from the "start" position to position 30.
  • the lance at this point is then rotated approximately 180° to position 31 shown in Fig.
  • increments of travel of the lance into the housing 10 between points 31-32, 33-34, etc. are substantially equivalent of the length of each 5° to 20° arc traversed by the lance as shown in Figs. 4 and 5. This accomplishes a total cleansing of the tubes in a highly efficient manner. It is also to be understood that steam may be emitted from the lance only at such time when tube banks 12 are in the path of the fluid openings 23 and 24 in order that energy be conserved.
  • Fig. 8 is a simplified diagram of the electrical arrangement including the motors and switching structure utilised in connection with the embodiment of Figs. 1-5.
  • All three motors are essentially standard Direct Current motors so that when the current to the motor is reversed, the motor turns in the opposite direction. Also, the motors each have a gear drive and require only a fraction of a horsepower for the necessary functions.
  • Each motor is supplied with current through a number of switches.
  • These switches are multiple pole, double throw. They are capable of performing one or both of the following two functions, depending on the way they are wired:
  • switch A (interrupt) which is mounted anywhere convenient to the operating personnel. This supplies current to the carriage travel Motor III. The carriage travels until it reaches the first soot blowing station, at which position switch B (interrupt) engages a strikerplate. Switch B interrupts the current to Motor III and passes the current to Motor I propelling the lance into the housing. After the head of the lance is in the housing, switch C (interrupt) is actuated which opens the solenoid valve admitting the steam to the lance. Just immediately before the end of the inward stroke, switch D (interrupt) is actuated which will start the lance rotation Motor II.
  • switch E reverse
  • switch F interrupt
  • the lance then is withdrawn from the housing and properly positioned stops rapidly actuate switches D, E and F so that the lance travels inward again after a slight rotation. After completing an in and out cycle covering almost 180° the lance travels withdraws from the housing. There are no stops located in the path of the outgoing lance to activate any of the switches which previously caused the lance to reverse and rotate. As the lance is withdrawn, switch C is activated, stopping steam flow.
  • a striker plate on the lance actuates switch G thereby causing Motor I, which was operating to move the lance 19 outwardly from the housing 10, to stop and starting Motor III.
  • the carriage 17 is thereupon moved until it reaches the next soot blowing station where a striker plate has been positioned to reactuate switch B which stops Motor III and starts Motor I.
  • the lance continues its outward movement and immediately thereafter engages a striker plate to actuate switch E and reverse the lance travel so that it begins to move through the aperture 20a and into the housing 10. That striker plate also actuates switch H which reverses the current to Motor II.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)

Claims (9)

1. Rußbläservorrichtung zur Reinigung von in einem gehäuse (10) mit Öffnungen (20) angebrachten Rohrbündeln (11) oder dergleichen, wobei die Vorrichtung umfaßt einen außerhalb des Gehäuses angeordneten beweglichen Schlitten (17) zur Bewegung einer Lanze (19), die auf dem Schlitten (17) angebracht ist, Antriebseinrichtungen (I, 11), die zur axialen Versetzung der Lanze (19) innerhalb einer entsprechenden Öffnung (20) im Gehäuse (10) und zur Drehung der Lanze (19) innerhalb der entsprechenden Öffnung (20) betätigbar sind, und eine Einrichtung (21) zur Verbindung der Lanze (19) mit einer Fluidquelle, wodurch unter Druck stehendes Fluid durch zumindest eine Fluidaustrittsöffnung (23, 24) in der Lanze (19) ausgestoßen werden kann, gekennzeichnet durch die beweglichkeit des Schlittens (17) zwischen einer ausgewählten Vielzahl von Öffnungen (20) in dem Gehäuse (10), durch eine zusätzliche Antriebseinrichtung (111), die zur Bewegung des Schlittens (17) zwischen der ausgewählten Vielzahl von Öffnungen (20) betätigbar ist, und durch eine Steuereinrichtung, die nacheinander die zusätzliche Antriebseinrichtung (III) zur Bewegung des Schlittens (17) automatisch von einer ausgewählten Öffnung (20) weg und zum Anhalten des Schlittens (17) automatisch bei der nächsten ausgewählten Öffnung (20) sowie die ersten Antriebseinrichtungen (I, 11) zum automatischen Einsetzen der Lanze (19) in jede ausgewählte Öffnung (20) und zum Bewegen der Lanze (19) in dieser und zum automatischen Rückzug der Lanze aus jeder ausgewählten Öffnung (20) betätigen kann.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Steuereinrichtung wahlweise die ersten Antriebseinrichtungen (I, II) zur Drehung der Lanze (19) um einen bestimmten Winkel innerhalb der ausgewählten Öffnung (20) betätigen kann.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Winkel zwischen ungefähr 5° und ungefähr 20° liegt.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Steuereinrichtung die ersten Antriebseinrichtungen (I, II) wahlweise zur Versetzung der Lance (19) um eine bestimmte Wegstrecke innerhalb jeder ausgewählten Öffnung (20) betätigen kann.
5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Steuereinrichtung die ersten Antriebseinrichtungen (I, II) so betätigen kann, daß diese innerhalb jeder ausgewählten Öffnung die Lanze (19) vorrücken, daraufhin die Lanze drehen, dann die Lanze zurückziehen, anschließend die Lanze nochmals drehen und dann wieder vorrücken, drehen und zurückziehen.
6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Steuereinrichtung die ersten Antriebseinrichtungen (I, II) so betätigen kann, daß diese innerhalb jeder ausgewählten Öfnung (20) die Lanze (19) in eine Richtung drehen, dann die Lanze vorrücken und dann in die andere Richtung drehen.
7. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Lanze (19) zwei Fluidauströmöffnungen (23, 24) hat, die sich in der Lanze (19) im wesentlichen diametral gegenüberliegen.
8. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Verbindungseinrichtung einen biegsamen Schlauch (21) umfaßt.
9. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Öffnungen (20) in dem Gehäuse (10) mit Abdeckungen (26) versehen sind, die geöffnet werden können, wenn die Lanze (19) eingesetzt wird.
EP79301627A 1979-08-10 1979-08-10 Russbläservorrichtung Expired EP0023937B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP79301627A EP0023937B1 (de) 1979-08-10 1979-08-10 Russbläservorrichtung
DE7979301627T DE2967085D1 (en) 1979-08-10 1979-08-10 Soot blowing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP79301627A EP0023937B1 (de) 1979-08-10 1979-08-10 Russbläservorrichtung

Publications (2)

Publication Number Publication Date
EP0023937A1 EP0023937A1 (de) 1981-02-18
EP0023937B1 true EP0023937B1 (de) 1984-07-04

Family

ID=8186415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79301627A Expired EP0023937B1 (de) 1979-08-10 1979-08-10 Russbläservorrichtung

Country Status (2)

Country Link
EP (1) EP0023937B1 (de)
DE (1) DE2967085D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE37745T1 (de) * 1982-05-17 1988-10-15 Emil Bader Verfahren und vorrichtung zur reinigung von waermetauschern.
US5299533A (en) * 1993-03-22 1994-04-05 The Babcock & Wilcox Company Open beam sootblower
DE102006004222A1 (de) 2006-01-30 2007-08-09 Gks - Gemeinschaftskraftwerk Schweinfurt Gmbh Verfahren und Vorrichtung zur Reinigung von Heizflächen in thermischen Anlagen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184774A (en) * 1963-03-19 1965-05-25 United States Steel Corp Checker-cleaning apparatus
GB1160439A (en) * 1965-09-21 1969-08-06 Jean Eugene Julien Dulait Improvements to Soot Blowing Devices.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3068507A (en) * 1959-08-28 1962-12-18 Babcock & Wilcox Ltd Fluid heater cleaners
US3216046A (en) * 1963-06-05 1965-11-09 Diamond Power Speciality Long travel soot blower with telescopic feed tube
US3269659A (en) * 1964-12-18 1966-08-30 Halliburton Co Apparatus for cleaning the inside of bundled tubes
FR1421870A (fr) * 1965-01-21 1965-12-17 Diamond Power Speciality Perfectionnements aux souffleurs de suie
BE664338A (de) * 1965-05-24 1965-11-24
FR1473139A (fr) * 1966-01-17 1967-03-17 Nordon Fruhinsholz Diebold Perfectionnements apportés aux appareils du genre des foreuses pour le nettoyage des tubes d'échangeurs de température ou autres
FR1489867A (fr) * 1966-06-17 1967-07-28 Perfectionnements aux dispositifs de soufflage de suie
US3794051A (en) * 1970-09-17 1974-02-26 Hydro Vel Services Inc Tube cleaning system
FR2347113A1 (fr) * 1976-04-05 1977-11-04 Nettoyage Ind Chimique Installation de nettoyage automatique d'echangeurs thermiques a faisceaux tubulaires

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184774A (en) * 1963-03-19 1965-05-25 United States Steel Corp Checker-cleaning apparatus
GB1160439A (en) * 1965-09-21 1969-08-06 Jean Eugene Julien Dulait Improvements to Soot Blowing Devices.

Also Published As

Publication number Publication date
EP0023937A1 (de) 1981-02-18
DE2967085D1 (en) 1984-08-09

Similar Documents

Publication Publication Date Title
US4174549A (en) Soot blowing apparatus
AU655392B2 (en) Sootblower with lance bypass flow
US5572957A (en) Automated sludge lance
US4025362A (en) Apparatus for cleaning the heat exchanging surfaces of the heat transfer plates of rotary regenerative heat exchangers
SU1554781A3 (ru) Способ удалени нагара с зоны нагретой поверхности теплообменника и устройство дл его осуществлени (его варианты)
EP0023937B1 (de) Russbläservorrichtung
CA1167333A (en) Rotary wall deslagger
US3234580A (en) Treatment of heat exchanger surfaces
US4649987A (en) Apparatus for cleaning the heat-exchanging surfaces of the storage elements of rotary regenerative heat exchangers
CA2671156C (en) Method and apparatus for cleaning a substantially vertical surface
US5044424A (en) Heat generator
US4815523A (en) Device and process for cleaning a recirculation-type regenerative heat exchanger
US3541999A (en) Apparatus and process for slag deposit removal
WO2000014375A1 (en) Device for application of dope on male threads
US5626184A (en) Sootblower
JPH09296998A (ja) 移動式バンドル洗浄装置
US4757785A (en) Steam generator sludge removal apparatus
KR830002461B1 (ko) 회전 및 왕복 수트 블로워(soot blower)기구
US2465921A (en) Method of cleaning flues
CA1112962A (en) Soot blower
SU1429947A3 (ru) Способ удалени прилипших отложений с нагревательной поверхности теплообменника и устройство дл его осуществлени
US20040194246A1 (en) Method and apparatus for converting a sootblower from a single motor to a dual motor drive
US4903756A (en) Heat generator
US6105539A (en) Steam generator top of tube bundle deposit removal apparatus
US3111701A (en) Long retracting blower requiring minimum outboard clearance

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19810713

ITF It: translation for a ep patent filed

Owner name: DR. ING. A. RACHELI & C.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT NL

REF Corresponds to:

Ref document number: 2967085

Country of ref document: DE

Date of ref document: 19840809

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19840824

Year of fee payment: 6

Ref country code: DE

Payment date: 19840824

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19840831

Year of fee payment: 6

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19860301

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19860430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19870501

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881118