EP0224490A1 - Device and process for cleaning a recirculation-type regenerative heat exchanger. - Google Patents
Device and process for cleaning a recirculation-type regenerative heat exchanger.Info
- Publication number
- EP0224490A1 EP0224490A1 EP85906049A EP85906049A EP0224490A1 EP 0224490 A1 EP0224490 A1 EP 0224490A1 EP 85906049 A EP85906049 A EP 85906049A EP 85906049 A EP85906049 A EP 85906049A EP 0224490 A1 EP0224490 A1 EP 0224490A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cleaning
- nozzle
- regenerative heat
- storage mass
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 37
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims description 16
- 230000008569 process Effects 0.000 title claims description 3
- 238000012546 transfer Methods 0.000 claims abstract description 11
- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 230000008859 change Effects 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims abstract description 5
- 239000012459 cleaning agent Substances 0.000 claims description 29
- 239000007789 gas Substances 0.000 claims description 23
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000356 contaminant Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 4
- 239000002274 desiccant Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000003112 inhibitor Substances 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 238000013020 steam cleaning Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 2
- 238000011010 flushing procedure Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 239000003599 detergent Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
-
- 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
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
- F28G9/005—Cleaning by flushing or washing, e.g. with chemical solvents of regenerative heat exchanger
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S165/00—Heat exchange
- Y10S165/009—Heat exchange having a solid heat storage mass for absorbing heat from one fluid and releasing it to another, i.e. regenerator
- Y10S165/01—Cleaning storage mass
- Y10S165/011—Reciprocating cleaner device, e.g. scraper, sprayer
Definitions
- the invention relates to a device for cleaning circulating regenerative heat exchangers for heat transfer from a higher temperature, dirty to a lower temperature pure gas stream with nozzles arranged on a slide and a guide and a drive of the slide for its radial displacement over the end face (s) of the storage mass of the circulating regenerative heat exchanger between a jacket-side outer and a hub-side inner end position and flexible lines for supplying the cleaning and / or rinsing media to the nozzles, as well as a method for cleaning circulating regenerative heat exchangers.
- the media hot steam and compressed air available in the power plant are often also used as cleaning agents in facilities for cleaning in order to remove aqueous precipitation at the so-called cold end of these heat exchangers.
- the cleaning is limited to this cold end, at which the cooled gases exit and the combustion air enters, after the heat transfer surfaces of the
- the temperature is temporarily below the dew point and thus the formation of incrustations is preferred.
- the cleaning on the exhaust side promotes the detached incrustations through the fresh air pipe and its throttle valve bi3 to the burners of the boiler system avoided, which could impair their function.
- rows of cleaning nozzles for a high-pressure cleaning agent and this downstream rinsing nozzles designed for higher liquid throughput, but lower pressure are provided on a nozzle slide which is displaced on the corresponding guide center relative to the levels of the heat-looking surfaces within a sector over the end face of the storage mass of the heat exchanger (DE-3 25 14 173).
- injector nozzles are used for a gaseous or vaporous cleaning agent which is at a lower to medium pressure and which are connected downstream of the injector tubes in the direction of the emerging nozzle jet in such a way that they form part of the suck these nozzles into the pipe during the operational use of the circulating regenerative heat exchanger and, mixed with the cleaning agent, feed them as directed jets at a speed balanced over the injector cross-section to the through-channels formed between the heat-looking surfaces of the storage mass (DE-B 26 15 433) .
- the suction process reduces the rate of entry of the jet streams into the through-channels between the heat-transferring surfaces to be cleaned, but increases the mass flow to the same extent and achieves a more intensive dissolving and blowing effect with a greater depth
- Circulating regenerative heat exchangers as heat exchangers have proven to be particularly at risk in this case, since their design has particularly narrow through-channels, in the gas inlet area of which residual color particles are preferably separated from the exhaust air stream, stick together and within let the circulating regenerative heat exchanger become inoperable for a short time.
- the invention has for its object to provide a way to effectively clean the heat transfer surfaces of circulating regenerative heat exchangers during their operational exposure to the heat-exchanging gases, with which without significantly increased energy consumption and / or less
- this object is achieved according to the invention in that a drive is assigned to the rotor of the regenerative heat exchanger, which can set changeable operating and, in contrast, reduced cleaning speeds and a change in the speed of the rotor depending on the position of the respective one Nozzle carriage between the rotor hub and the rotor jacket to control, and that on the jacket and hub side limit switch for an interruption or change in the direction of movement of the nozzle carriage are provided.
- a further development is advantageous for intensive cleaning, in which a step switching mechanism is assigned to the drive of the nozzle carriage, which in each case moves the nozzle carriage further by approximately the diameter of the cone of the nozzle jets hitting the storage mass as soon as this cone rotates on the storage mass as the rotor rotates. End face closes at least one annulus.
- an advantageous backlash-free feed of the slide can be achieved by at least one threaded spindle and associated, at their opposite ends on a housing cross member and / or wall parts of the
- a spindle nut which is connected to the nozzle slide and into which the threaded spindle, which is driven by a drive motor, engages, and by at least one high-pressure hot water or steam cleaning nozzle and / or a compressed air nozzle.
- This collecting device can be as parallel to the axis
- lips made of flexible material can be arranged on the inlet side of the collecting device.
- a particularly economical use of liquid cleaning agent is achieved if a connecting line is provided which connects to an outlet of the collecting device is connected for the cleaning agent and - if necessary with the involvement of a treatment device for the separation of entrained contaminants into one
- Detergent is used, i.e. the cleaning nozzles are connected to a compressed air source or a steam generator. If a compressed air source is available anyway, it makes sense to drive the threaded spindle (s) by means of a compressed air motor - instead of the adjustable electric motor that is otherwise possible.
- one or more pneumatic cylinders can also be connected as a motion drive to the nozzle slide and, if necessary, additionally to the collecting device.
- the nozzle carriage is expediently guided on at least one profile element and secured against rotation.
- This profile element has been useful the shape of a slotted tube, which encompasses the spindle or the piston rod of the pneumatic cylinder on the inlet side of the contaminated gas and secures the spindle nut or the connecting element between the slide and the spindle nut or the piston rod against rotation in a slot which is offset from the inlet side.
- the slot tube has a double function, namely the function of guiding the nozzle slide on the one hand and shielding the threaded spindle or the piston rod of the
- Compressed air cylinder on the other hand against settling of the impurities contained in the gas stream.
- Timiaufender regenerative heat exchanger which is characterized in that the speed of the rotating part of the regenerative heat exchanger for cleaning is reduced, blasting a cleaning agent and optionally a desiccant with a continuous or gradual radial Displacement from the outside to the inside and / or vice versa are sprayed onto the end face of the storage mass, as a result of which the impurities separated in the entrance area of the through-channels between the heat-transferring surfaces are effectively dissolved by the cleaning agent and evenly when the front side of the storage mass is acted upon by the cleaning agent and at the same time through the through-channels of the heat-looking gases through and on the storage mass end face opposite the entry of the polluted gas and the cleaning agent.
- This proceed moderately so that the jets are then gradually offset by approximately the width of the area of incidence of the jets on the storage mass when the rotating part of the regenerative heat exchanger has made at least one complete revolution.
- the speed of rotation of the rotating part of the regenerative heat exchanger is expediently reduced to a speed between 0.1 and 0.3, in particular 0.2, revolutions per minute for the uniform and gentle action on the end face of the storage mass by the cleaning agent jets.
- regenerative heat exchangers which are provided for the heat transfer of mist-containing exhaust air to the fresh air to be supplied to a paint spraying system
- high-pressure hot water with a pressure of 60 to 140 bar, preferably 120 bar and a temperature of about 60 to 100, is advantageously used as a liquid cleaning agent Surface of the storage mass sprayed on.
- the storage mass can then be dried with compressed air supplied under a pressure between 3 and 8 bar.
- the hot water can contain solvents and / or inhibitors, for example to prevent or reduce the Corrosion of the storage mass sheets are added.
- the storage mass is first cleaned with a radial displacement of the cleaning spray jets from the outside inwards and then with a radial displacement of the rinsing or drying jets from the inside out is rinsed outside and / or dried, whereupon the cleaning and / or rinsing or drying is repeated if necessary.
- the procedure can be reversed, or the rinsing and drying jets are applied immediately after the cleaning spray jets during the same radial displacement.
- a mixture of gaseous or liquid and solid, preferably powdery or granular agents can also be used as the cleaning agent for the transfer of exhaust gas heat to the fresh air to be supplied to a room or rooms.
- FIG. 1 shows a perspective view of a partial section of a device according to the invention
- Fig. 2 is a perspective view of a partial section of a modified embodiment of the device according to the invention.
- Figure 1 is the partially broken view of a partial section of a revolving regenerative heat exchanger with rotary driven, i.e. shown as a rotor serving storage mass 7.
- a drying nozzle 1 and a cleaning nozzle 3 are attached to a common carriage 5.
- the nozzles are connected radially in series with respect to the storage mass 7 of the heat exchanger, which is shown only in a detail.
- a line 11 leads the drying nozzle 1 compressed air and a line 31
- a spindle nut (not shown), through which a threaded spindle 13 passes, is attached to the slide 5.
- the threaded spindle is enclosed by a profile element in the form of a slotted tube 15.
- the spindle nut fixedly connected to the nozzle slide extends through the slot of the slotted tube 15.
- the ends of the spindle are rotatably supported in bearings 17 and a stepping drive 19 is connected to the radially outer end.
- a collecting trough 20 Arranged on the side of the storage mass opposite the arrangement of the carriage as the carrier of the nozzles is a collecting trough 20 which has an outlet 22 for disposal.
- the inlet opening of the collecting trough is made of elastic with lips 24, 26 which are inclined backwards obliquely towards the inlet direction Provide material that opens when the cleaning agent jets strike and thus prevent the cleaning agent from flowing back out of the collecting trough 20 to the storage mass 7.
- FIG. 2 shows a modification of the collecting device on a somewhat enlarged scale compared to FIG. 1 and in a more limited section.
- the drying and cleaning nozzle only the nozzle heads 51, 53 are shown in the drawing.
- a "funnel-shaped collecting device 59 with a connecting line 61 is arranged on the side of the storage mass 57 opposite these nozzles. This collecting device is connected via a holder 63 to a slide 65 which is coupled to a threaded spindle 67 via a spindle nut (again not shown).
- the threaded spindle 67 is shielded from the surrounding gas flow by a profile element 69, again designed as a slotted tube, which at the same time takes over the guidance of the slide, the longitudinal contactor 71 provided in the profile element 69 securing the slide against rotation 2.
- a spindle (not shown) for the movement of the carriage carrying the nozzles 51, 53 is mechanically coupled such that the nozzle heads 51, 53 on one side and the collecting device 59 on the opposite side of the storage mass 57 are synchronously radially above them facing storage mass end faces can be moved by a common drive motor.
- the cleaning device according to the invention is described in its application in regenerative heat exchangers with a rotating storage mass as a rotor and consequently standing connection channels for the heat-exchanging gas streams.
- the storage mass and in the second case, the synchronously rotating rotating hoods provided on the inlet and outlet side are the rotating part of the heat exchanger, i.e. as a rotor.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning In General (AREA)
- Air Supply (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Nozzles (AREA)
Abstract
Un dispositif pour nettoyer des échangeurs de chaleur régénérateurs utilisés pour le transfert de chaleur d'un écoulement de gaz contaminé à haute temperature à un écoulement de gaz propre à basse température. Sur un coulisseau (5) qui se déplace radialement sur la surface d'extrémité du corps de stockage (7) se trouvent des becs (3, 1), dirigés vers la surface d'extrémité du corps de stockage; les becs permettent de pulvériser sur le corps de stockage un moyen de nettoyage et/ou de rinçage. Le rotor de l'échangeur de chaleur régénérateur est équipé d'un entraînement qui permet le réglage de vitesses de fonctionnement variables et de vitesses de rotation réduites proportionnellement pour le nettoyage. De plus, le changement de vitesse de rotation du rotor peut être réglé selon sa position radiale devant la surface d'extrémité du corps de stockage; aux extrémités de la course radiale du coulisseau sont prévus des commutateurs d'extrémité pour interrompre le mouvement du coulisseau (5) ou changer sa direction.A device for cleaning regenerative heat exchangers used for the transfer of heat from a flow of contaminated gas at high temperature to a flow of clean gas at low temperature. On a slide (5) which moves radially on the end surface of the storage body (7) are spouts (3, 1), directed towards the end surface of the storage body; the spouts allow spraying on the storage body a means of cleaning and / or rinsing. The rotor of the regenerative heat exchanger is equipped with a drive which allows the adjustment of variable operating speeds and proportionally reduced rotational speeds for cleaning. In addition, the change in rotational speed of the rotor can be adjusted according to its radial position in front of the end surface of the storage body; at the ends of the radial stroke of the slide are provided end switches to interrupt the movement of the slide (5) or change its direction.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85906049T ATE55830T1 (en) | 1985-04-26 | 1985-11-09 | EQUIPMENT AND PROCEDURES FOR CLEANING ROUNDING REGENERATIVE HEAT EXCHANGER. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60089143A JPS61250497A (en) | 1985-04-26 | 1985-04-26 | Heat exchanger matrix |
JP89143/85 | 1985-04-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0224490A1 true EP0224490A1 (en) | 1987-06-10 |
EP0224490B1 EP0224490B1 (en) | 1990-08-22 |
Family
ID=13962642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85906049A Expired - Lifetime EP0224490B1 (en) | 1985-04-26 | 1985-11-09 | Device and process for cleaning a recirculation-type regenerative heat exchanger |
Country Status (8)
Country | Link |
---|---|
US (1) | US4815523A (en) |
EP (1) | EP0224490B1 (en) |
JP (1) | JPS61250497A (en) |
CA (1) | CA1263375A (en) |
DE (1) | DE3579320D1 (en) |
FI (1) | FI86476C (en) |
WO (1) | WO1986006464A1 (en) |
YU (2) | YU45293B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107030044A (en) * | 2015-07-13 | 2017-08-11 | 中国石油天然气股份有限公司 | Magnetic cleaning machine |
CN112696971A (en) * | 2020-12-29 | 2021-04-23 | 苏州天河中电电力工程技术有限公司 | High-pressure water jet type online cleaning equipment and method for condenser |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5135580A (en) * | 1991-03-27 | 1992-08-04 | Union Underwear Co., Inc. | Filter-washing system |
US5924478A (en) * | 1997-05-08 | 1999-07-20 | Caterpillar Inc. | Radiator washing system and method |
DE19923200A1 (en) | 1999-05-20 | 2000-11-23 | Abb Patent Gmbh | Device for cleaning heat-exchanging surfaces of circulating regenerative heat exchanger involving rotor comprising several rotor sectors rotating around axis and supported in housing, lance of cleaning device having nozzle head at free end |
DE202006008719U1 (en) * | 2006-05-03 | 2007-09-13 | Liebherr-Werk Bischofshofen Ges.M.B.H. | Radiator cleaner |
PL2051033T3 (en) * | 2007-10-17 | 2010-10-29 | Balcke Duerr Gmbh | Regenerative heat exchanger |
US9557119B2 (en) * | 2009-05-08 | 2017-01-31 | Arvos Inc. | Heat transfer sheet for rotary regenerative heat exchanger |
US20110005706A1 (en) * | 2009-07-08 | 2011-01-13 | Breen Energy Solutions | Method for Online Cleaning of Air Preheaters |
IT1399495B1 (en) * | 2010-04-13 | 2013-04-19 | Studio Nuove Applic Ind S R L | APPARATUS FOR THE DEACTIVATION OF GGH BASKETS. |
US9587894B2 (en) * | 2014-01-13 | 2017-03-07 | General Electric Technology Gmbh | Heat exchanger effluent collector |
CN110039176B (en) * | 2019-05-08 | 2020-10-16 | 温岭市豪基机床附件有限公司 | Residue cleaning device for laser cutter |
US20220349664A1 (en) * | 2019-07-26 | 2022-11-03 | Geesco Co., Ltd. | Heat exchanger cleaning system and heat exchanger cleaning method |
CN213687219U (en) * | 2020-09-27 | 2021-07-13 | 西部技研环保节能设备(常熟)有限公司 | Antibacterial and antiviral honeycomb rotating wheel with copper ion dissolving agent surface coating for air conditioner |
WO2022141015A1 (en) * | 2020-12-29 | 2022-07-07 | 苏州西热节能环保技术有限公司 | Steam soot blowing apparatus, rotary air preheater, and steam jet parameter design method |
Family Cites Families (15)
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US2236635A (en) * | 1940-01-03 | 1941-04-01 | Jay A Young | Apparatus for cleaning preheaters |
GB789971A (en) * | 1953-03-13 | 1958-01-29 | Superheater Co Ltd | Improvements in and relating to heat exchangers |
US2761653A (en) * | 1953-06-29 | 1956-09-04 | Air Preheater | Rotary heater washer control system |
FR1308836A (en) * | 1961-11-24 | 1962-11-09 | Method and apparatus for treating hot surfaces of combustion devices using an aqueous slurry to reduce corrosion and the formation of slag deposits on such surfaces | |
FR1387730A (en) * | 1964-04-07 | 1965-01-29 | Titovi Zd I Litostroj | Apparatus for supplying fresh air, in particular in crane cabins and the like |
DE1546151A1 (en) * | 1965-03-22 | 1969-05-14 | Collardin Gmbh Gerhard | Process for cleaning heating surfaces of circulating regenerative preheaters |
US3858452A (en) * | 1973-07-09 | 1975-01-07 | Vemco Products Inc | Emergency release for screw drive operator traveler assembly |
DE2514173C3 (en) * | 1975-04-01 | 1980-03-20 | Kraftanlagen Ag, 6900 Heidelberg | Device for cleaning the heat-exchanging surfaces of the storage masses of circulating regenerative heat exchangers |
US4256511A (en) * | 1979-09-17 | 1981-03-17 | The Dow Chemical Company | High energy wash of ljungstrom air preheater |
BE879153A (en) * | 1979-10-02 | 1980-02-01 | Sadacem | SWEEPING SYSTEM FOR ROTARY AIR HEATERS |
JPS5676238A (en) * | 1979-11-26 | 1981-06-23 | Mitsubishi Heavy Ind Ltd | Clearing of dust in solid-gas catalytic reactor |
US4376443A (en) * | 1981-08-24 | 1983-03-15 | Stewart & Stevenson Services, Inc. | Jet water cleaning apparatus |
JPS5842797U (en) * | 1981-09-18 | 1983-03-22 | 株式会社日立製作所 | Waste liquid concentrator using exhaust gas waste heat |
US4402104A (en) * | 1981-10-14 | 1983-09-06 | Prvni Brnenska Strojirna, Koncernovy Podnik | Device for the surface cleaning of rotating machine elements |
DE3309371A1 (en) * | 1983-03-16 | 1984-09-20 | GEA Luftkühlergesellschaft Happel GmbH & Co, 4630 Bochum | Device for heat transfer |
-
1985
- 1985-04-26 JP JP60089143A patent/JPS61250497A/en active Pending
- 1985-11-09 EP EP85906049A patent/EP0224490B1/en not_active Expired - Lifetime
- 1985-11-09 DE DE8585906049T patent/DE3579320D1/en not_active Expired - Fee Related
- 1985-11-09 WO PCT/EP1985/000599 patent/WO1986006464A1/en active IP Right Grant
- 1985-11-09 US US07/005,197 patent/US4815523A/en not_active Expired - Lifetime
- 1985-12-06 CA CA000497079A patent/CA1263375A/en not_active Expired
- 1985-12-17 YU YU1976/85A patent/YU45293B/en unknown
-
1986
- 1986-12-18 FI FI865180A patent/FI86476C/en not_active IP Right Cessation
-
1987
- 1987-07-17 YU YU134387A patent/YU45828B/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO8606464A1 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107030044A (en) * | 2015-07-13 | 2017-08-11 | 中国石油天然气股份有限公司 | Magnetic cleaning machine |
CN107030044B (en) * | 2015-07-13 | 2019-09-06 | 中国石油天然气股份有限公司 | Magnetic cleaning machine |
CN112696971A (en) * | 2020-12-29 | 2021-04-23 | 苏州天河中电电力工程技术有限公司 | High-pressure water jet type online cleaning equipment and method for condenser |
CN112696971B (en) * | 2020-12-29 | 2022-06-21 | 苏州天河中电电力工程技术有限公司 | High-pressure water jet type online cleaning equipment and method for condenser |
Also Published As
Publication number | Publication date |
---|---|
JPS61250497A (en) | 1986-11-07 |
YU197685A (en) | 1988-06-30 |
WO1986006464A1 (en) | 1986-11-06 |
FI865180A0 (en) | 1986-12-18 |
FI86476B (en) | 1992-05-15 |
FI86476C (en) | 1992-08-25 |
FI865180A (en) | 1986-12-18 |
YU45293B (en) | 1992-05-28 |
YU45828B (en) | 1992-07-20 |
CA1263375A (en) | 1989-11-28 |
EP0224490B1 (en) | 1990-08-22 |
DE3579320D1 (en) | 1990-09-27 |
YU134387A (en) | 1990-06-30 |
US4815523A (en) | 1989-03-28 |
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