WO2005066573A1 - Heat exchanger comprising cleaning means - Google Patents
Heat exchanger comprising cleaning means Download PDFInfo
- Publication number
- WO2005066573A1 WO2005066573A1 PCT/FR2004/003130 FR2004003130W WO2005066573A1 WO 2005066573 A1 WO2005066573 A1 WO 2005066573A1 FR 2004003130 W FR2004003130 W FR 2004003130W WO 2005066573 A1 WO2005066573 A1 WO 2005066573A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- enclosure
- balls
- exchanger according
- manifold
- grids
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/005—Other auxiliary members within casings, e.g. internal filling means or sealing means
-
- 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
- F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies
Definitions
- Heat exchanger provided with cleaning means.
- the present invention relates to heat exchangers, also called condensers, and more particularly to their cleaning.
- a condenser comprises an enclosure furnished with a plurality of tubes inside which circulates a heat transfer fluid which performs a heat exchange with a warmer surrounding medium (generally water vapor coming from a turbine of a power plant and which, in contact with the colder tubes, condenses on them to be then routed to a collection well).
- the heat transfer fluid transports spherical cleaning bodies, hereinafter called balls, which clean the internal walls of the condenser tubes to avoid fouling due to the deposition of impurities present in the fluid (generally river water, sea water , or from cooling towers or other sources).
- two collectors respectively for supplying heat transfer fluid and for discharging the fluid, are connected to the enclosure on either side, and connect the latter to a circuit for supplying heat transfer fluid.
- the balls are separated from the fluid after passing through the evacuation collector and then reinjected towards the supply collector by means of a recycling device arranged in the vicinity of the enclosure.
- a recycling device arranged in the vicinity of the enclosure.
- the invention aims to solve this drawback in particular by proposing a condenser which has a reduced bulk, and whose installation is simplified.
- the invention provides a heat exchanger comprising: an enclosure provided with tubes in which circulates a heat transfer fluid transporting cleaning balls, an outlet manifold connected on the one hand to said enclosure for the evacuation of the heat transfer fluid in coming from the latter, and on the other hand to a circuit for evacuating the heat-transfer fluid, this collector being produced in one piece, and a device arranged in said collector for separating the cleaning balls from the fluid which transports them.
- the balls being separated from the fluid in the immediate vicinity of the enclosure, directly in the collector, it is possible to save on long evacuation pipes, and thus guarantee a better compactness of the installation.
- the outlet manifold has a first portion forming a convergent, as well as a second portion forming a tube which is connected to said convergent (for example at right angle), and in which the separation device is placed.
- the separation device comprises a plurality of grids arranged across said tubing, associated in pairs to form a filtering structure with a W-profile converging on the side opposite to said enclosure towards a device disposed in the elbow to recover the cleaning balls separated from the heat transfer fluid by the separation device.
- Each grid comprises, for example, a row of parallel braced blades, preferably mounted on a common axis extending across the manifold.
- Each grid can be rotatably mounted around its axis, to allow its own cleaning.
- the exchanger may, in this case, include a device for measuring a difference in fluid pressure on either side of the grids, connected to a system provided for controlling the rotation of the grids when this pressure difference is greater than a value predetermined.
- the exchanger may further include a ball recycling circuit, connecting the ball recovery device to a supply manifold connected to the enclosure for supplying the latter with heat transfer fluid, supply manifold through which the balls are reinjected into the enclosure.
- FIG. 1 is a sectional elevation view of a condenser according to the invention.
- FIG. 1 is shown a heat exchanger, also called condenser, comprising an enclosure 1 furnished with a plurality of tubes 2 in which circulates a heat transfer fluid (in this case water) for the condensation of steam coming for example from a turbine of a power plant (not shown).
- the heat transfer fluid is brought to the enclosure 1 by a supply manifold (also called a “water box”) 3 connected to the enclosure 1 by a first side wall 4, on which the tubes 2 end and on the side of which the fluid enters the enclosure 1 to then circulate in the tubes 2.
- a supply manifold also called a “water box”
- the fluid is evacuated from the enclosure 1 by an outlet manifold (also called “water box”) 5 connected to the enclosure 1 by a second wall lateral 6, opposite to the first 4, on which the tubes 2 end and on the side of which the fluid leaves the enclosure 1 after having circulated in the tubes 2 which constitute the place of a heat exchange between the heat transfer fluid and the water vapor, this being condensed on the external walls of the tubes 2 to then flow towards a collection basin 7 located under the enclosure 1.
- the heat transfer fluid carries cleaning balls 8 d aligned in an elastic, compressible material which, carried by the fluid, pass with it through the tubes 2.
- the diameter of the balls 8 is greater than the internal diameter of the tubes 2, so that, by traversing the latter, the balls 8 " scrape their internal walls which it cleans of impurities which, carried by the heat transfer fluid, have accumulated there.
- the tubes 2 extend parallel to each other along a horizontal X axis perpendicular to the side walls 4, 6, which in this case are vertical. By convention, it is assumed that the heat transfer fluid circulates from the first side wall 4 to the second 6 - that is to say, in Figure 1, from left to right, as indicated by the arrow F.
- the outlet manifold 5 has an upstream mouth 9, by which it is connected to the enclosure 1, and a downstream mouth 10, by which it is connected to a pipe (not shown) for evacuating the heat-transfer fluid, the section of the upstream mouth 9 here being greater than that of the downstream mouth 10.
- the outlet manifold 5 comprises, from upstream to downstream, a first portion 11 which forms a convergent (in this case with rectangular section, although any other section could be envisaged), as well as a second portion 12 with a substantially constant section (here circular) connected to the convergent 11 in one piece, the manifold 5 thus forming a part piece.
- the convergent 11 and the tubing 12 form a bend substantially at right angles, so as to deflect downward the flow leaving horizontally from the enclosure 1, the tubing 12 extending along a substantially vertical Y axis.
- This provision given by way of example, is in no way restrictive, since it aims to channel the flow towards a recovery zone imposed by the configuration of the premises.
- the tubing could extend along the axis X, or form with it any angle between
- This device 13 provided for separating the balls 8 from the fluid which transports them is disposed in the outlet manifold 5 and, more precisely, in the tubing 12.
- This device 13 comprises a plurality of grids 14,
- each grid 14, 15, 16, 17 comprises a row of parallel blades 18, 19 held at equal distance from each other by means of a plurality of coaxial spacers 20 together forming an axis 21, 22, 23, 24 common support support the respective grid 14, 15, 16, 17, axis which extends across the manifold 12 of the manifold 5.
- Each blade 18, 19 has a substantially straight leading edge 25, inclined relative to the direction of the current, indicated in Figure 2 by arrow F ', at an angle between 15 ° and 30 °.
- Each blade 18, 19 also has an upstream end 26, 27 and a downstream end 28, 29 opposite.
- Each grid 14, 15, 16, 17 is associated in pairs 14, 15 on the one hand and 16, 17 on the other hand, the axes 21, 22, 23, 24 of the grids 14, 15, 16, 17 being parallel two by two .
- Each grid 14, 15, 16, 17 is mounted for rotation about its respective support axis 21, 22, 23, 24, between a normal position of use, illustrated in solid lines in FIG. 2, in which the grids 14, 15
- the separation device 13 comprises at least two pairs of grids 14, 15 on the one hand and 16, 17 on the other hand, each consisting of a central grid 15, 16, located near the axis Y of the second portion 12 of the outlet manifold 5, and whose blades 19 are relatively long, and a peripheral grid 14, 17, located near the wall of the manifold 5, and whose blades 18 are relatively shorter.
- the central grids 15, 16 are back-to-back, the upstream ends 27 of their respective blades 19 being in contact with two in pairs, while the peripheral grids 14, 17 are in contact with the wall of the collector 5, the upstream ends 26 of their blades 19 coming to bear against the internal wall of the collector 5.
- the grids 14, 15, 16, 17 together form a filtering structure with a W profile, each pair of grids 14, 15 and 16, 17 forming a funnel through which the balls 8 pass and defining, between the downstream ends 28 and 29 of their respective blades 18, 19, a gap 30, 31.
- the distance between two adjacent blades 18, 19 of the same grid 14, 15, 16, 17 is less than the diameter of the balls 8, so that a ball 8 cannot pass between two adjacent blades 18, 19.
- the width of the i nterstice 30, 31 between the downstream ends 28, 29 of the blades 18, 19 of the same pair of grids 14, 15 or 16, 17. is greater than the diameter of the balls 8. Also these, after having been guided by the leading edges 25 of the blades 18, 19, are they forced by the current to pass in the gap 30, 31. As there is for the balls 8 no other passage in the section of the outlet manifold 5 , these are thus separated from the fluid which transports them by the grids 14, 15, 16, 17. As illustrated in FIG.
- a device 32 is arranged in the elbow 5 to collect the balls 8 at the outlet of the separation device 13.
- This device 32 comprises two receptacles 33, 34 each placed at the right of the gap 30, 31 of each pair of grids 14, 15 and 16, 17, and in which the balls 8 are received and then reused.
- a recycling circuit 35 of the balls is provided, which connects each receptacle 33, 34 of the recovery device 32 to the supply manifold 3 by which the balls 8 are reinjected into the enclosure 1.
- a pump placed on the recycling circuit 35 sucks the balls 8 received in the receptacles 33, 34 to return them to the supply manifold 3.
- the impurities carried by the heat transfer fluid are gradually deposited on the leading edge 25 blades 18, 19. In order to ensure regular cleaning of the blades 18, 19, the grids 14 are periodically controlled,
- this pressure difference can cause deformation of the grids 14, 15, 16, 17, or even their breakage. It is therefore proposed to measure this pressure difference using appropriate means, and, when the pressure difference exceeds a predetermined threshold, deemed critical for the flow of the fluid, to control - and this automatically by means of a suitable control system to which the probes are connected - the rotation of the grids 14, 15, 16, 17 in order to allow their cleaning. As the grids 14, 15, 16, 17 are placed not far from a bent zone at the outlet of the enclosure 1, the flow of the fluid in the vicinity of the grids 14, 15,
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Cleaning In General (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/582,057 US20070163752A1 (en) | 2003-12-12 | 2004-12-06 | Heat exchange comprising cleaning means |
EP04805647A EP1704379A1 (en) | 2003-12-12 | 2004-12-06 | Heat exchanger comprising cleaning means |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0314643 | 2003-12-12 | ||
FR0314643A FR2863697B1 (en) | 2003-12-12 | 2003-12-12 | HEAT EXCHANGER WITH CLEANING MEANS. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005066573A1 true WO2005066573A1 (en) | 2005-07-21 |
Family
ID=34610642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2004/003130 WO2005066573A1 (en) | 2003-12-12 | 2004-12-06 | Heat exchanger comprising cleaning means |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070163752A1 (en) |
EP (1) | EP1704379A1 (en) |
FR (1) | FR2863697B1 (en) |
WO (1) | WO2005066573A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010142306A1 (en) * | 2009-06-10 | 2010-12-16 | Gea Ecoflex Gmbh | Method for operating a plate heat exchanger and condenser system having a plate heat exchanger |
US8534119B2 (en) * | 2010-12-30 | 2013-09-17 | Schneider Electric It Corporation | System and method for air containment zone air leakage detection |
CN105823371B (en) * | 2016-05-27 | 2017-11-14 | 深圳市勤达富流体机电设备有限公司 | A kind of small-sized front-end end enclosure bobbin carriage cleaning machine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2818006B1 (en) * | 1978-04-25 | 1979-08-09 | Taprogge Reinigungsanlagen | Tube heat exchanger with a cleaning device |
FR2438814A1 (en) * | 1978-10-11 | 1980-05-09 | Technos | IMPROVEMENTS IN THE CLEANING OF TUBE HEAT EXCHANGERS |
US4865121A (en) * | 1986-08-29 | 1989-09-12 | Ben Dosa Chaim | Cleaning system for fluid-conducting tubing |
EP0358921A1 (en) * | 1988-09-15 | 1990-03-21 | Dorr-Oliver Deutschland GmbH | Tube bundle apparatus |
EP0453043A1 (en) * | 1990-04-18 | 1991-10-23 | Eskla B.V. | Method for cleaning the walls of heat exchangers and heat exchanger with means for said cleaning |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1795348A (en) * | 1927-03-30 | 1931-03-10 | Westinghouse Electric & Mfg Co | Condenser-cleaning system |
IL58248A (en) | 1978-10-10 | 1983-12-30 | Snyder Wesley L | Aiming system for attachment to a barrelled weapon |
JPS55143399A (en) * | 1979-04-23 | 1980-11-08 | Hitachi Ltd | Cleaner arresting device for tubular heat exchanger |
DE2923659C2 (en) * | 1979-06-11 | 1981-12-24 | Josef Ing.(Grad.) 4006 Erkrath Koller | Device for branching off cleaning bodies |
DE3562050D1 (en) * | 1985-05-03 | 1988-05-05 | Gea Energiesystemtechnik Gmbh | Sluice for collecting spherical cleaning bodies |
IL94289A (en) * | 1990-05-04 | 1992-12-01 | Balls Technics Ltd | Cleaning system for cleaning fluid-conducting tubing |
US5388636A (en) * | 1993-11-18 | 1995-02-14 | C.Q.M. Ltd. | System for cleaning the inside of tubing |
-
2003
- 2003-12-12 FR FR0314643A patent/FR2863697B1/en not_active Expired - Fee Related
-
2004
- 2004-12-06 US US10/582,057 patent/US20070163752A1/en not_active Abandoned
- 2004-12-06 WO PCT/FR2004/003130 patent/WO2005066573A1/en active Application Filing
- 2004-12-06 EP EP04805647A patent/EP1704379A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2818006B1 (en) * | 1978-04-25 | 1979-08-09 | Taprogge Reinigungsanlagen | Tube heat exchanger with a cleaning device |
FR2438814A1 (en) * | 1978-10-11 | 1980-05-09 | Technos | IMPROVEMENTS IN THE CLEANING OF TUBE HEAT EXCHANGERS |
US4865121A (en) * | 1986-08-29 | 1989-09-12 | Ben Dosa Chaim | Cleaning system for fluid-conducting tubing |
EP0358921A1 (en) * | 1988-09-15 | 1990-03-21 | Dorr-Oliver Deutschland GmbH | Tube bundle apparatus |
EP0453043A1 (en) * | 1990-04-18 | 1991-10-23 | Eskla B.V. | Method for cleaning the walls of heat exchangers and heat exchanger with means for said cleaning |
Also Published As
Publication number | Publication date |
---|---|
FR2863697A1 (en) | 2005-06-17 |
FR2863697B1 (en) | 2008-09-12 |
US20070163752A1 (en) | 2007-07-19 |
EP1704379A1 (en) | 2006-09-27 |
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