EP2054692A1 - Vorrichtung zur reinigung von hochdruckkesseln - Google Patents
Vorrichtung zur reinigung von hochdruckkesselnInfo
- Publication number
- EP2054692A1 EP2054692A1 EP07802955A EP07802955A EP2054692A1 EP 2054692 A1 EP2054692 A1 EP 2054692A1 EP 07802955 A EP07802955 A EP 07802955A EP 07802955 A EP07802955 A EP 07802955A EP 2054692 A1 EP2054692 A1 EP 2054692A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- boiler
- container
- cleaning
- connecting piece
- pressure
- 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
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
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
- F23J3/023—Cleaning furnace tubes; Cleaning flues or chimneys cleaning the fireside of watertubes in boilers
-
- 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
-
- 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
- F28G15/003—Control arrangements
Definitions
- the present invention relates to a device for cleaning a boiler with a cleaning fluid having at least one cleaning device, which comprises means for aligning a fluid distribution device to inner regions of the boiler.
- boilers are considered, which are intended to treat a gas at high pressure and high temperature.
- Such boilers serve, for example, as heat exchangers for coal gasification plants.
- coal gasification is meant a series of processes for coal conversion in which ground coal is reacted with water vapor and oxygen at temperatures of 650 0 C to 2,000 0 C and pressures of up to 100 bar.
- synthesis gases are produced with different proportions of hydrogen, carbon monoxide and methane.
- This synthesis gas serves, for example, as a starting substance for the chemical industry, but it is also possible, for example with high proportions of methane, that the synthesis gas is used as natural gas substitute.
- the synthesis gas or crude gas is cooled in at least one heat exchanger. If necessary, additional fluids (steam, gases, etc.) can be added, but this is not absolutely necessary. However, it should be noted that this synthesis gas or raw gas on entering such a heat exchanger, for example, after a kind of shell and tube heat exchanger, still temperatures well above 1000 0 C, for example of about 1,400 0 C, has. If necessary, pressures in the range of 50 bar or more in the heat exchanger boiler are maintained.
- the inventive device for cleaning a boiler with a cleaning fluid with at least one cleaning device which comprises means for aligning a fluid distribution to the inner regions of the boiler, has at least one cleaning device which is surrounded by a container and at least one connecting piece to a connecting piece of the boiler can be mounted.
- the means for alignment can cause a pivoting, moving and / or rotating of the fluid distribution device, possibly also a positioning adjacent to different inner areas of the boiler.
- the fluid distribution device can be designed as a type of water, steam and / or gas lance, in particular with a nozzle, which can deliver a directed jet of the cleaning fluid.
- the means for alignment now allow a relative movement to the boiler or to its inner regions, so that optionally different inner regions can be flown with the cleaning fluid.
- the at least one cleaning device is surrounded by a, preferably gas-tight, container.
- container is meant in particular a container in the interior of which pressures (well above the atmospheric pressure) can be maintained, which in particular are still above the (possibly even maximum) operating pressure in the interior of the boiler.
- pressure vessel may be made of high-strength steel, for example.
- This container or pressure vessel has at least one connecting piece, which is (also pressure-tight) can be mounted on a connecting piece of the boiler.
- this connection piece is designed in the manner of a pipe attachment to the container, so that the protruding connection piece can be easily positioned to the connecting piece of the boiler.
- the connecting piece can be designed with connecting elements in order to be able to be aligned with exact position to the connecting piece.
- a plurality of connecting pieces may be provided, for example in order to simultaneously realize a plurality of connections to the boiler or to be able to contact different connection variants or connecting pieces of the boiler with an exact fit.
- the connecting pieces are provided with an end seal, so that only the currently used connecting piece is opened.
- the device is provided as a kit, wherein the container may be provided with different receiving constructions to include, if necessary, several and / or mutually different, cleaning equipment.
- the pressure booster system comprises in particular a gas supply device, optionally also a gas discharge device.
- a gas in particular a so-called purge gas
- purge gas for example, nitrogen is considered, but it is also possible to introduce other gases, such as those that are also present in the boiler, in the pressure vessel.
- the pressure booster can be connected to the container in particular with a pressure line and optionally with a pressure sensor.
- the fluid distribution device is designed to be movable or pivotable at least through the at least one connecting piece.
- the fluid distribution device can be moved both through the connector and in addition also pivotable or even additionally designed rotatable.
- in particular means are provided which allow a relative movement of at least one subcomponent of the fluid distribution device through the at least one connecting piece.
- positioning means are also provided, which initially align the fluid distribution device to the respectively desired connection piece and then at least partially pass it.
- parts of the cleaning fluid line, the fluid lance eg heavy, tube-like component of an extension of at least 1 meter
- the nozzle can be moved through the connection piece.
- a subcomponent of the fluid distribution device can then only be moved through the connection piece when the connection piece substantially implements a vertical connection to the boiler, so that the fluid distribution device can be inserted vertically into the vessel from above.
- a pivoting of the fluid distribution device is preferred when the fluid distribution device through a substantially horizontal connection is introduced via the connector into inner portions of the boiler.
- the fluid distribution device comprises a flexible hose which can be arranged on a hose reel, and the hose reel is provided in the container.
- the fluid distribution device comprises, for example, a nozzle which can dip vertically in the direction of the boiler and is arranged on a flexible hose (eg metal hose) that withstands the temperatures and pressures.
- the fluid distribution device is designed so that it dispenses the cleaning fluid approximately horizontally and / or preferably also upwards against the force of gravity, in particular substantially rotationally symmetrical uniformly distributed to the inner regions of the boiler.
- the hose In order to allow immersion in the boiler over, for example, 20 or 30 m, the hose is placed on a corresponding hose reel so that it can be unwound at different distances depending on the desired cleaning height.
- This, relatively large, hose reel is now also positioned in the pressure vessel. This has the advantage that the hose guide is within the same pressure level.
- Sensors for operating the hose reel are preferably positioned outside the container
- the device wherein the fluid distribution device comprises a flexible hose which can be moved by means of a drive through the at least one connecting piece, is equipped with a drive arranged in the container.
- the metal hose is driven frictionally, for example by driven rollers.
- the rollers are advantageously operable in both directions, so that a wegwegaue fluid distribution is realized.
- This drive is also advantageously arranged in the container, with the embodiments described here. variant with the driven rollers can readily withstand the conditions prevailing in the operating conditions.
- the drive for the hose reel and / or displacement sensor for controlling the movement of the hose are positioned outside the container.
- suitable passages through the container are provided.
- This is, in particular, a heat exchanger boiler, which adjoins a coal gasification plant.
- This boiler which is designed, for example, as a cylindrical pressure vessel with membrane walls and bulkhead heating surfaces (tube material Inconell 800, AC66) and has a diameter of, for example, 3 to 5 m and a height of 30 to 50 m, is provided with a gas pressure in the range of Operated 30 to 50 bar, wherein the inlet temperature of the gas in the boiler in a range of 1,000 0 C to 1,600 0 C is located.
- mass flows of the gas of 15 to 25 t / h are realized.
- a plurality of devices are mounted on the top of the boiler or mounted, so that then vertically fluid distribution devices can be introduced into the boiler so that they can reach with their cleaning fluid at least portions of the realized there clutchMSfizze.
- the heat exchange surfaces are very particularly preferably formed with a plurality of heat exchanger tubes, through which, for example, a cooling medium such as water flows. These heat exchange surfaces are positioned in particular in the upper third of the boiler.
- the tubes, the contemplation of the cross section of the boiler can now be arranged with a pattern.
- Such a pattern comprises, for example, a circular arrangement of the tubes at a certain distance from the boiler housing, of which radially inwardly oriented rows are provided down to a central region, so that a plurality of heat exchanger sectors are formed in the circumferential direction, for example 10, 12, 14, 16 , 18 or 20 in number. It is now preferred that at least one connecting piece is provided for each of these heat exchanger spaces, so that one (or more) cleaning device or one (or more) fluid distribution device penetrates vertically into the boiler via the connecting piece and descend selectively to the desired heat exchanger sector can. In this way, a very targeted and thorough cleaning is possible.
- the boiler has a plurality of connecting pieces and at least one device can be aligned with a plurality of connecting pieces.
- the fluid distribution device is aligned together with the container to the respective connecting piece, a pressure-tight connection is generated, and then the cleaning device is activated.
- closure means are provided on the at least one connecting piece.
- This closure means are used in particular to seal the connection piece with respect to the external environment, so that, for example, gas exchange from the interior of the boiler into the environment or the container is no longer possible. This ensures that the container can be disconnected, especially then the pressure therein can be eliminated.
- This on the one hand a preservation of the internal component is achieved, moreover, for example, a mounting flap of the container can be opened to perform a maintenance and / or repair of the arranged inside the container components.
- At least sensors are provided for determining a degree of soiling of the heat exchange surface or the ambient conditions in the boiler. It is preferred that both types of sensors mentioned above are present.
- the sensors for determining a degree of contamination of the heat exchange surface it should be noted that although these sensors may be optical or non-contacting sensors, preference is given to heat flow sensors which are brought into heat-conducting contact with the heat exchange surface at certain horizontal levels. On the basis of the temperature difference, the heat exchange between the passing gas and the heat exchange medium in the interior of the heat exchanger tubes can be detected, so that the degree of slag can be determined in this way.
- a targeted, selective cleaning of the soiled areas of the heat exchange surface is carried out.
- the provision of sensors to determine the ambient conditions in the boiler is helpful, for example, to determine or regulate the pressure inside the container for the next cleaning process.
- a control unit be provided for at least one of the following functions: supply of the cleaning fluid, positioning of the device to the boiler, change of the ambient conditions in the container, acquisition of operating data of the boiler.
- the control unit is connected to at least one of the following components: the device, the cleaning fluid supply line, the hose reel, the drive, the connecting piece, a sensor, the pressure increasing device.
- the control unit can, for example, supply the cleaning fluid or deactivate the supply of the cleaning fluid. to take. Also, for example, taking into account the determined slagging of the heat exchange surface, the positioning of the device or the Fluidverteil sensible done.
- a method for cleaning an operating system with at least one vessel for the treatment of a gas at high pressure and high temperature comprising at least the following steps:
- This method can be realized in particular with the plant described here according to the invention.
- the ambient conditions in the container relate in particular to the pressure. So especially when adjusting the pressure in the container to select such a pressure that is above the pressure in the boiler, for example, an overpressure of about 50 kPa. Due to the slight overpressure, the purge gas (for example, nitrogen) flows through the connection piece and the connecting piece into the boiler, so that penetration of the synthesis gas into the pressure container is avoided. At the same time, contamination of the components in the container is counteracted.
- a fluid-technological connection between the container and the boiler is realized by step (b), for example by opening corresponding blocking and / or closing means.
- the fluid distribution device is particularly preferably selectively positioned on (only) the polluted sectors and begins there with a cleaning.
- Step (d) means in particular the supply of a cleaning medium with a pressure which is sufficient to reach the heat exchange surfaces to be cleaned.
- the pressure has to be chosen in particular such that only wetting (essentially without abrasive action) is realized, whereas with gases the kinetic energy has to be sufficiently high to blow away the contaminants, so that the smallest possible distance between Fluid distribution and heat exchange surface should be realized.
- the completion of the cleaning process comprises at least one of the following steps:
- identifying a cleaning state is meant in particular that the current cleaning state is detected or measured.
- a certain cleaning intensity or cleaning time is used as a fixed (time) limit for completing the cleaning process, but a higher-quality cleaning result can be achieved with the first-mentioned variant.
- the fluidic connection between vessel and vessel is then to be separated in particular so that e.g. powered shut-off and / or closing means are active.
- the ambient condition in the tank is re-adjusted to the normal atmosphere.
- This method is particularly advantageous when the container is provided in step (a) with a pressure of at least 30 bar, in particular for example even 50 bar.
- the container and the corresponding seals are suitable for this purpose.
- the vessel is charged with nitrogen gas in step (a).
- a slight overpressure (about 30 to 80 kPa) compared to the pressure in the boiler to realize.
- a liquid is used as the cleaning fluid, with this being used with an overpressure of 1 to 10 bar, preferably 1 Up to 5 bar, based on the pressure in the boiler is initiated. This is just enough, taking into account the flow velocities of the synthesis gas, in order to be able to wet the areas of the boiler that are more than 200 mm away, for example.
- the impingement or action of the liquid in the slag leads to a sudden evaporation, with the concomitant sudden volume change causing the slag to burst or flake off.
- FIG. 1 shows schematically the structure of a coal gasification plant with a device according to the invention for implementing the method according to the invention.
- the boiler 2 is illustrated, which is designed here with two connecting pieces 8, which are each designed with closure means 15.
- the connection means 15 are designed with a motor (represented by a circle with an M), while the right connection piece 8 has a closure means 15 in the manner of a flap, which can only be opened manually.
- a heat exchange surface 14 is shown in the left area, for example, with a series of heat exchange tubes, which are traversed by water.
- the vertical direction extending tubes and the heat exchange surface 14 has at different horizontal levels sensors 16 for determining the temperature.
- conclusions can be drawn about the degree of slagging or contamination of the heat exchange surface 14. If a high pollution is identified, the cleaning process begins, advantageously only in the sufficient actually heavily cleaned sectors of the heat exchange surface 14 is actually made a selective cleaning.
- the cleaning itself is realized here with the device 1 according to the invention.
- the device 1 comprises a cleaning device 4, which comprises a hose reel 11, a hose 10, a drive 12 and a fluid distribution device 5. These components are also arranged in a container 6, which withstands pressures of, for example, 60 bar.
- the container 6 is designed essentially kesseniförmig, wherein a pressure-tight sealed side wall can be separated as a mounting flap for mounting the individual components.
- the container 6 has a connection piece 7, which can be connected to the connecting piece 8 of the boiler 2. This can be done either directly or, as illustrated here, with a (in particular tubular) intermediate piece.
- the fluid distribution device 5 has been passed out of the container 6 through the connection piece 7 and the connecting piece 8, so that the fluid distribution device 5 is positioned to the corresponding sectors of the heat exchange surface 14 to be cleaned.
- the heat exchange surfaces 14 are wetted and also cleaned by the expansion of the liquid.
- the fluid distribution device 5 is again returned to the interior of the container 6 in a latching position, wherein the tube 10 is rolled up on the hose reel 11 at the same time.
- the closure means 15 can be controlled by motor, so that the boiler 2 is again tightly closed.
- the container 6 is charged with a flushing medium, in particular nitrogen. This is introduced by means of the pressure booster 9 in the interior of the container 6. With the help of a sensor 16 in the connection between the pressure booster 9 towards the container 6, the pressure in the interior of the container 6 can be accurately adjusted or regulated (eg, depending on the pressure in the boiler). If the desired pressure is available, you can Therefore, the closure means 15 are opened.
- the cleaning fluid supply can also be monitored with corresponding sensors (for monitoring the pressure, pressure sensors are provided which are marked with a P).
- a plurality of servomotors 19 are also provided.
- the servomotors, the sensors and the like are also connected to a control unit 17 via various connections 18 in order to realize a data exchange and / or a control and / or a regulation of various components.
- This entire system 13 is used in particular for cooling a synthesis gas which flows into the boiler 2 at temperatures above 1300 ° C. and a pressure above 40 bar.
- the device 1 shown here allows for the first time the cleaning of heat exchange surfaces in such boilers, which are operated at high pressure and high temperature and that online, ie during operation.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cleaning In General (AREA)
- Incineration Of Waste (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006041742A DE102006041742A1 (de) | 2006-09-04 | 2006-09-04 | Vorrichtung zur Reinigung von Hochdruckkesseln |
PCT/EP2007/058938 WO2008028844A1 (de) | 2006-09-04 | 2007-08-28 | Vorrichtung zur reinigung von hochdruckkesseln |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2054692A1 true EP2054692A1 (de) | 2009-05-06 |
EP2054692B1 EP2054692B1 (de) | 2011-06-15 |
Family
ID=38779857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07802955A Not-in-force EP2054692B1 (de) | 2006-09-04 | 2007-08-28 | Vorrichtung zur reinigung von hochdruckkesseln |
Country Status (7)
Country | Link |
---|---|
US (1) | US20090217888A1 (de) |
EP (1) | EP2054692B1 (de) |
CN (1) | CN101512281B (de) |
AU (1) | AU2007293986B2 (de) |
CA (1) | CA2661096A1 (de) |
DE (1) | DE102006041742A1 (de) |
WO (1) | WO2008028844A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1394362B1 (it) * | 2009-05-18 | 2012-06-15 | Termosanitaria S R L | Sistema per igienizzare e/o detergere uno scambiatore di calore |
WO2011135081A2 (de) * | 2010-04-29 | 2011-11-03 | Siemens Aktiengesellschaft | Verfahren und vorrichtung zur temperaturkontrolle von dampf in einem kessel |
EP2418023A1 (de) | 2010-08-13 | 2012-02-15 | Siemens Aktiengesellschaft | Verfahren zum Abschluss einer chemischen Kraftwerksreinigung |
DE102010051275A1 (de) | 2010-11-12 | 2012-05-16 | Heyo Mennenga | Reinigungsvorrichtung für Rührwerksreaktoren |
CN103389006A (zh) * | 2013-06-21 | 2013-11-13 | 安徽华速机器人科技有限公司 | 一种凝汽器在线清洗机器人干式增压盘管系统 |
WO2018098556A1 (en) * | 2016-11-28 | 2018-06-07 | Candu Energy Inc. | System and method of cleaning a heat exchanger |
CN111220001A (zh) * | 2020-01-13 | 2020-06-02 | 国家能源集团煤焦化有限责任公司 | 冷却器和煤焦化系统 |
US11924994B2 (en) * | 2021-07-16 | 2024-03-05 | Dell Products L.P. | Managing a heatsink of an information handling system |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2725045B2 (de) * | 1977-06-03 | 1980-07-10 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen | Verfahren zur Reinigung eines Wärmetauschers |
US4333742A (en) * | 1981-03-04 | 1982-06-08 | Combustion Engineering, Inc. | Soot blower using fuel gas as blowing medium |
JPS62109000A (ja) * | 1985-11-07 | 1987-05-20 | Takao Sakamoto | 熱交換器における伝熱管の内面洗浄方法 |
US4907543A (en) * | 1988-11-07 | 1990-03-13 | Matranga Joseph G | Boiler air port cleaner |
EP0489862B1 (de) * | 1989-08-30 | 1995-05-24 | C.V.D. System Cleaners Corporation | Reinigungsvorrichtung für ein chemisches dampfniederschlagsystem |
US5129455A (en) * | 1990-03-08 | 1992-07-14 | Ohmstede Mechanical Services, Inc. | Multi-lance tube cleaning system having flexible portions |
US5237718A (en) * | 1992-05-01 | 1993-08-24 | The Babcock & Wilcox Company | Sootblower with lance bypass flow |
US5579726A (en) * | 1994-08-04 | 1996-12-03 | Finucane; Louis | Apparatus for cleaning boilers |
FR2723634B1 (fr) * | 1994-08-12 | 1996-10-31 | Framatome Sa | Dispositif de nettoyage par jet de liquide d'une plaque tubulaire d'un echangeur de chaleur et utilisation. |
FI20010162A0 (fi) * | 2001-01-26 | 2001-01-26 | Timo Juhani Vanhatalo | Menetelmä ja laitteisto lämmönvaihtimen putkien puhdistamiseksi |
US6681839B1 (en) * | 2001-02-23 | 2004-01-27 | Brent A. Balzer | Heat exchanger exchange-tube cleaning lance positioning system |
CN2516937Y (zh) * | 2001-06-14 | 2002-10-16 | 王印忠 | 自冲洗精密采暖循环水除污器 |
CA2491960C (en) * | 2002-07-09 | 2011-08-16 | Clyde Bergemann, Inc. | Multi-media rotating sootblower and automatic industrial boiler cleaning system |
NL1023715C2 (nl) * | 2003-06-20 | 2004-12-21 | Sif Ventures B V | Inrichting voor het reinigen van de vlampijpen in een ketel. |
US7360508B2 (en) * | 2004-06-14 | 2008-04-22 | Diamond Power International, Inc. | Detonation / deflagration sootblower |
WO2006021164A1 (de) * | 2004-08-20 | 2006-03-02 | A. Monforts Textilmaschinen Gmbh & Co. Kg | Rohr-wärmetauscher |
US20080271685A1 (en) * | 2007-05-04 | 2008-11-06 | Lupkes Kirk R | Detonative cleaning apparatus |
-
2006
- 2006-09-04 DE DE102006041742A patent/DE102006041742A1/de not_active Ceased
-
2007
- 2007-08-28 EP EP07802955A patent/EP2054692B1/de not_active Not-in-force
- 2007-08-28 CN CN2007800327543A patent/CN101512281B/zh not_active Expired - Fee Related
- 2007-08-28 AU AU2007293986A patent/AU2007293986B2/en not_active Ceased
- 2007-08-28 CA CA002661096A patent/CA2661096A1/en not_active Abandoned
- 2007-08-28 WO PCT/EP2007/058938 patent/WO2008028844A1/de active Application Filing
-
2009
- 2009-03-03 US US12/396,907 patent/US20090217888A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2008028844A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008028844A1 (de) | 2008-03-13 |
DE102006041742A1 (de) | 2008-03-06 |
AU2007293986A1 (en) | 2008-03-13 |
US20090217888A1 (en) | 2009-09-03 |
CA2661096A1 (en) | 2008-03-13 |
AU2007293986B2 (en) | 2011-06-16 |
CN101512281A (zh) | 2009-08-19 |
CN101512281B (zh) | 2012-01-11 |
EP2054692B1 (de) | 2011-06-15 |
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