EP1170566A2 - Grille pour intercepter des éléments solides mis en circulation dans un échangeur de chaleur pour le nettoyage de celui-ci, et installation de gestion de tels éléments comportant une telle grille - Google Patents
Grille pour intercepter des éléments solides mis en circulation dans un échangeur de chaleur pour le nettoyage de celui-ci, et installation de gestion de tels éléments comportant une telle grille Download PDFInfo
- Publication number
- EP1170566A2 EP1170566A2 EP01401627A EP01401627A EP1170566A2 EP 1170566 A2 EP1170566 A2 EP 1170566A2 EP 01401627 A EP01401627 A EP 01401627A EP 01401627 A EP01401627 A EP 01401627A EP 1170566 A2 EP1170566 A2 EP 1170566A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- grid
- elements
- grid according
- cleaning
- wings
- 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.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies
Definitions
- the present invention relates generally to exchangers heat, and, for example, tubular heat exchangers forming condensers, which are continuously cleaned by solid elements, in practice in the form of a ball and made for example of foam rubber, systematically put into circulation for this purpose in one of the flows concerned.
- the tubes are cleaned by injecting upstream of the exchanger solid cleaning items, usually rubber balls foam of density substantially equal to that of cooling water and diameter very slightly greater than the internal diameter of the tubes to be cleaned.
- the exchanger solid cleaning items usually rubber balls foam of density substantially equal to that of cooling water and diameter very slightly greater than the internal diameter of the tubes to be cleaned.
- These solid cleaning elements are captured in the piping of outlet of the exchanger by interposing an inclined bar grid, by example from 20 to 30 °, elliptical in shape; the intercepted elements roll the along the grid under the effect of the water current and are collected at the downstream end of the grid.
- V-shaped grids are often used, point up or point down, with collection of cleaning elements for two sides or in the center, respectively.
- the elements are extracted with a small part of the water flow by a pump ; more generally, the management of solid cleaning elements leads, through a collection airlock, or to stop them, or to let them circulate or change them; for recycling, the pump returns them, as well as the water, upstream of the exchanger.
- the grids consist of a generally articulated support frame to allow the pivoting of the grids and their periodic cleaning on the other hand current.
- the chassis supports the grids made up of equidistant bars offering free spaces of a few millimeters between them.
- the bars must be thin in order to reduce the loss of charge.
- the current method of constructing grids is to drill holes holes in the metal bars, in stainless steel, at regular intervals and at assemble by tie rods threaded in the holes with interposition of spacers tubular between the bars; these operations are long and costly; through elsewhere, the longevity of such grids depends on the quality of the tightening, the holding spacers, spacing of tie rods; in addition, repairs in place in the pipe or the cuff where they are mounted are very difficult.
- weld the bars on bars support As a variant, it has been proposed to weld the bars on bars support; such welds are very numerous and very small, and vulnerable corrosion; they generate internal stresses in the metal and reduce resistance to vibration fatigue; the durability of such grids is limited.
- the present invention aims to overcome these drawbacks.
- a management of solid elements cleaning basically involves, on the one hand, to avoid that, with the flow that carries them, the solid cleaning elements involved are evacuated to the sewer, the interposition, on the outlet pipe of the heat exchanger heat, means of interception specific to their containment, and, on the other hand, the recycling, to the inlet pipe of the heat exchanger, solid cleaning elements thus retained by these means of interception.
- the object of the present invention is to propose so-called means intercept in the form of a grid which does not have the disadvantages of those of the prior art and which can intervene at any level of an installation Management.
- a grid for intercepting solid elements placed circulation in a heat exchanger for cleaning thereof is characterized by the fact that it comprises a chassis and, assembled on this chassis, grid elements obtained by molding.
- the grid elements are obtained by molding a synthetic material; the synthetic material is polypropylene; matter synthetic is a polyphenylene.
- the frame consists of metal rafters in the shape of plates arranged in parallel at a regular pitch and crossed by, and welded to, transverse spacers and a hinge pin; the elements of grid are of generally rectangular shape and extend between two plates, following one another.
- each grid element has a cross section generally U-shaped, with two wings and a core, said core being defined by a plurality of longitudinal bars connected by transverse crosspieces, the bars and the crossbeams defining a plurality of meshes.
- the wings are provided with an external longitudinal edge by which the grid element rests on the edge of a plate, the distance transverse of the outer faces of the wings being equal to that which separates the faces internal facing two adjacent plates between which the element is disposed grid.
- the wings of the grid elements are provided with holes. intended to come to the right of holes made in the plates; bolts assemble the grid elements placed on either side thereof to a plate.
- positioning means are provided for the precise relative positioning of one grid element with respect to another.
- the positioning means comprise, at a end of the grid element, longitudinal tabs placed laterally at the end of the wings and intended to cooperate with longitudinal notches placed laterally at the other end of the neighboring grid element.
- the means of positioning include, at one end of the grid element, an advanced and a recess arranged transversely and intended to cooperate respectively with a recess and a projection arranged transversely at the other end of the neighboring grid element.
- the present invention also relates to a management installation.
- for solid cleaning elements circulating in a heat exchanger for the cleaning thereof of the kind comprising means of interception specific to the retaining and / or guiding the solid cleaning elements, characterized by fact that the interception means comprise at least one grid as above.
- FIG. 1 there is shown schematically, under the general reference 10, a heat exchanger, and, for example, a heat exchanger forming condenser, which, as shown by the arrows F1, is crossed by a flow coolant, in this case water, on the one hand, a inlet pipe 11, and, on the other hand, an outlet pipe 12.
- a flow coolant in this case water
- this is a tubular heat exchanger, which, by example, is of the type succinctly described in document FR-A-2 716,530 mentioned above.
- filtration means 13 are interposed on the inlet pipe 11, by means of a cuff 14.
- solid elements of cleaning 15 are likely to be permanently circulated in the heat exchanger 10, for continuous cleaning thereof.
- these solid cleaning elements 15 are systematically injected into the inlet pipe 11, downstream of the filtration means 13, to be driven by the incoming flow.
- the management installation 18 comprises a recycling line 19 connected, on one side, to a recuperator 20 to which the solid cleaning elements 15 are directed by the interception means 17 and, on the other side, to the suction of a pump 21 connected to a return 22 via a counter 23 and a collector 24;
- the return line 22 serves, in the sleeve 14, nozzles 25 which inject solid cleaning elements into the incoming flow 15 to recirculate in it and which preferably are oriented to against the current.
- the interception means 17 here consist of two grids 30 arranged in a V, the point of which is directed downwards, towards the recuperator 20 that it surrounds.
- Each grid 30 is rotatably mounted around an axis 31 so that, thanks to geared motors 32, they can occupy at least two positions, a so-called operational position, point of V downwards, as shown, and a so-called cleaning position, point of V upwards, as as sketched in dashed lines, in which the grids 30 can be cleared of unwanted elements that they would have retained and that would interfere the rolling of the solid cleaning elements 15 along the grids 30.
- a grid 30, better visible in FIGS. 2 to 4 comprises a frame 33 consisting of metal chevrons in the form of plates 34 arranged in parallel with a regular pitch and crossed by, and welded to, transverse spacers 35 and axis 31.
- grid elements 36 are assembled on this frame 33, of form generally rectangular, extending between two plates 34 and one after the other.
- Each grid element 36 is obtained by molding, preferably of a synthetic material, such as for example polypropylene, polyphenylene, or other synthetic material.
- a grid element 36 has a generally U-shaped cross section, with two wings 37; the soul of the U is defined by a plurality of bars 38 longitudinal connected by transverse cross-pieces 39 of lesser height, the bars 38 and the sleepers 39 defining a plurality of meshes 40 here rectangular.
- the wings 37 are provided with an external longitudinal edge 41, extending along the entire length of the grid element 36, by which it rests on the edge of the plate 34, as visible in FIG. 4, the distance transverse of the outer faces of the wings 37 being equal to that which separates the internal faces opposite two neighboring plates 34 between which is arranged the grid element 36.
- the wings 37 grid elements 36 are provided with holes 42, advantageously oblong in the longitudinal direction of the grid elements 36; the holes 42 come to the holes 43 formed in the plates 34.
- Bolts 44 assemble to plate 34, Figure 4, through holes 42 and at the holes 43, the grid elements 36 placed on either side of the latter.
- Positioning means are provided for positioning precise relative of the grid elements 36, with respect to each other.
- These positioning means comprise, at one end of the grid element 36, longitudinal tongues 45 placed laterally in end of the wings 37 and intended to cooperate with longitudinal notches 46 placed laterally at the other end of the grid element 36.
- these positioning means also comprise, between the longitudinal tabs 45, a projection 47 and a withdrawal 48 arranged transversely and intended to cooperate respectively with a withdrawal 48 and a projection 47 placed transversely between the longitudinal notches 46.
- the molding of the grid elements 36 can be produced with great precision and optimized to reduce pressure losses and turbulence which minimizes vibrations; the grid according to the invention is insensitive to corrosion, easily assembled, and light; its cost price is not high and can be changed easily, item by item.
- a grid according to the invention can be used for any level of any management facility, including a installation of the kind described in document FR-A-2 766 915.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims (14)
- Grille pour intercepter des éléments solides mis en circulation dans un échangeur de chaleur pour le nettoyage de celui-ci, caractérisée par le fait qu'elle comprend un châssis (33) et, assemblés sur ce châssis (33), des éléments de grille (36) obtenus par moulage.
- Grille selon la revendication 1, caractérisée par le fait que les éléments de grille (36) sont obtenus par moulage d'une matière synthétique.
- Grille selon la revendication 2, caractérisée par le fait que la matière synthétique est un polypropylène.
- Grille selon la revendication 2, caractérisée par le fait que la matière synthétique est un polyphenylène.
- Grille selon l'une des revendications 1 à 4, caractérisée par le fait que le châssis (33) est constitué de chevrons métalliques en forme de plaques (34) disposées parallèlement selon un pas régulier et traversées par, et soudées à, des entretoises transversales (35) et un axe d'articulation (31).
- Grille selon la revendication 5, caractérisée par le fait que les éléments de grille (36) sont de forme globalement rectangulaire et s'étendent entre deux plaques (34), à la suite l'un de l'autre.
- Grille selon l'une des revendications 5 ou 6, caractérisée par le fait que chaque élément de grille (36) a une section transversale globalement en forme de U, avec deux ailes (37) et une âme, ladite âme étant définie par une pluralité de barreaux (38) longitudinaux reliés par des traverses (39) transversales, les barreaux (38) et les traverses (39) définissant une pluralité de mailles (40).
- Grille selon les revendications 5 et 7 prises conjointement, caractérisée par le fait que les ailes (37) sont munies d'un rebord longitudinal externe (41) par lequel l'élément de grille (36) repose sur la tranche d'une plaque (34), la distance transversale des faces externes des ailes (37) étant égale à celle qui sépare les faces internes en regard de deux plaques (34) voisines entre lesquelles est disposé l'élément de grille (36).
- Grille selon l'une des revendications 7 ou 8, caractérisée par le fait que les ailes (37) des éléments de grille (36) sont munies de trous (42) destinés à venir au droit de perçages (43) ménagés dans les plaques (34).
- Grille selon la revendication 9, caractérisée par le fait que des boulons (44) assemblent à une plaque (34) les éléments de grille (36) placés de part et d'autre de celle-ci.
- Grille selon l'une des revendications 1 à 10, caractérisée par le fait que des moyens de positionnement sont prévus pour le positionnement relatif précis d'un élément de grille (36) par rapport à un autre.
- Grille selon les revendications 7 et 11 prises conjointement, caractérisée par le fait que les moyens de positionnement comprennent, à une extrémité de l'élément de grille (36), des languettes longitudinales (45) placées latéralement en bout des ailes (37) et destinées à coopérer avec des échancrures longitudinales (46) placées latéralement à l'autre extrémité de l'élément de grille (36) voisin.
- Grille selon la revendication 11, caractérisée par le fait que les moyens de positionnement comprennent, à une extrémité de l'élément de grille (36), une avancée (47) et un retrait (48) disposés transversalement et destinés à coopérer respectivement avec un retrait (48) et une avancée (47) disposés transversalement à l'autre extrémité de l'élément de grille (36) voisin.
- Installation de gestion pour éléments solides de nettoyage (15) circulant dans un échangeur de chaleur (10) pour le nettoyage de celui-ci, du genre comportant des moyens d'interception (17) propre à la retenue et/ou au guidage des éléments solides de nettoyage (15), caractérisée par le fait que les moyens d'interception comprennent au moins une grille selon l'une des revendications 1 à 13.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0008625 | 2000-07-03 | ||
FR0008625A FR2811072B1 (fr) | 2000-07-03 | 2000-07-03 | Grille pour intercepter des elements solides mis en circulation dans un echangeur de chaleur pour le nettoyage de celui-ci, et installation de gestion de tels elements comportant une telle grille |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1170566A2 true EP1170566A2 (fr) | 2002-01-09 |
EP1170566A3 EP1170566A3 (fr) | 2002-06-26 |
Family
ID=8852047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01401627A Withdrawn EP1170566A3 (fr) | 2000-07-03 | 2001-06-20 | Grille pour intercepter des éléments solides mis en circulation dans un échangeur de chaleur pour le nettoyage de celui-ci, et installation de gestion de tels éléments comportant une telle grille |
Country Status (4)
Country | Link |
---|---|
US (1) | US6609559B2 (fr) |
EP (1) | EP1170566A3 (fr) |
JP (1) | JP2002054893A (fr) |
FR (1) | FR2811072B1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10358858A1 (de) * | 2003-12-16 | 2005-07-14 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betreiben einer induktiven Last mit unterschiedlichen elektrischen Spannungen |
US6913071B1 (en) * | 2004-05-03 | 2005-07-05 | C.Q.M. Ltd. | Ball trap with safety-release gate |
FR2892186B1 (fr) * | 2005-10-19 | 2008-02-08 | Technos Et Cie Snc | Grille de separation pour separer d'un fluide porteur des corps nettoyants provenant d'un echangeur thermique. |
FR2892185B1 (fr) * | 2005-10-19 | 2008-12-26 | Technos Et Cie Snc | Element filtrant pour une grille de filtration destinee a separer d'un fluide porteur des corps nettoyants provenant d'un echangeur thermique. |
KR100791243B1 (ko) * | 2006-11-17 | 2008-01-03 | 한국에너지기술연구원 | 고체입자-물 공급장치를 이용한 자체청소형 열교환기 |
JP2010169335A (ja) * | 2009-01-23 | 2010-08-05 | Hitachi Ltd | 熱交換器及びその水室 |
US9835393B2 (en) * | 2012-09-20 | 2017-12-05 | Jeongwoo Industrial Machine Co., Ltd. | Apparatus for circulating balls for cleaning a pipe line |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3015677A1 (de) * | 1979-04-23 | 1980-11-06 | Hitachi Ltd | Vorrichtung zum auffangen von zum reinigen eines roehrenwaermetauschers verwendeten reinigungskoerpern |
US4762610A (en) * | 1985-10-21 | 1988-08-09 | Screenex Wire Weaving Manufacturers (Proprietary) Limited | Screening arrangement |
GB2203061A (en) * | 1987-04-10 | 1988-10-12 | Thule United Ltd | Filter screen assembly |
US4960510A (en) * | 1987-06-26 | 1990-10-02 | Steinhaus Gmbh | Screening apparatus having a screen grid with a plurality of exchangeable screen elements |
EP0457238A1 (fr) * | 1990-05-14 | 1991-11-21 | Hitachi, Ltd. | Appareillage pour recueillir des corps nettoyants pour un À©changeur de chaleur tubulaire |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1795348A (en) | 1927-03-30 | 1931-03-10 | Westinghouse Electric & Mfg Co | Condenser-cleaning system |
JPS5111253B2 (fr) | 1972-03-24 | 1976-04-09 | ||
ZA774472B (en) * | 1977-07-25 | 1979-06-27 | Herrmann Screens Mfg Co Ltd | Improvements in or relating to screening apparatus |
US4661245A (en) * | 1982-12-09 | 1987-04-28 | Fioris Pty Ltd. | Screening system |
FR2609644B1 (fr) | 1987-01-16 | 1991-01-04 | Beaudrey & Cie | Filtre auto-nettoyant a inserer sur une conduite sous pression |
US4909929A (en) * | 1988-10-24 | 1990-03-20 | Norris Screen & Manufacturing, Inc. | Interlocking clamping system |
IL94289A (en) * | 1990-05-04 | 1992-12-01 | Balls Technics Ltd | Cleaning system for cleaning fluid-conducting tubing |
US5248043A (en) * | 1992-02-28 | 1993-09-28 | Dorn Lloyd A | Modular retro-fit screen system for a screening deck |
FR2716530B1 (fr) * | 1994-02-24 | 1996-07-12 | Beaudrey & Cie | Dispositif d'interception pour éléments solides circulant dans un échangeur de chaleur pour le nettoyage de celui-ci. |
FR2766915B1 (fr) | 1997-07-31 | 1999-10-08 | Beaudrey & Cie | Procede pour la gestion des elements solides mis en circulation dans un echangeur de chaleur pour le nettoyage de celui-ci, et installation correspondante |
FR2789598B1 (fr) * | 1999-02-11 | 2001-04-27 | Beaudrey & Cie | Tamis mecanique, en particulier tablier filtrant d'un filtre a chaines |
US6283303B1 (en) * | 1999-03-29 | 2001-09-04 | M-I L.L.C. | Vibrating screen separator, separating method, and clamping device |
US6267246B1 (en) * | 2000-02-14 | 2001-07-31 | Western Wire Works, Inc. | Screening system for screening or diverting particulate material |
-
2000
- 2000-07-03 FR FR0008625A patent/FR2811072B1/fr not_active Expired - Fee Related
-
2001
- 2001-06-20 EP EP01401627A patent/EP1170566A3/fr not_active Withdrawn
- 2001-07-03 JP JP2001201967A patent/JP2002054893A/ja active Pending
- 2001-07-03 US US09/897,442 patent/US6609559B2/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3015677A1 (de) * | 1979-04-23 | 1980-11-06 | Hitachi Ltd | Vorrichtung zum auffangen von zum reinigen eines roehrenwaermetauschers verwendeten reinigungskoerpern |
US4762610A (en) * | 1985-10-21 | 1988-08-09 | Screenex Wire Weaving Manufacturers (Proprietary) Limited | Screening arrangement |
GB2203061A (en) * | 1987-04-10 | 1988-10-12 | Thule United Ltd | Filter screen assembly |
US4960510A (en) * | 1987-06-26 | 1990-10-02 | Steinhaus Gmbh | Screening apparatus having a screen grid with a plurality of exchangeable screen elements |
EP0457238A1 (fr) * | 1990-05-14 | 1991-11-21 | Hitachi, Ltd. | Appareillage pour recueillir des corps nettoyants pour un À©changeur de chaleur tubulaire |
Also Published As
Publication number | Publication date |
---|---|
US20020017379A1 (en) | 2002-02-14 |
FR2811072A1 (fr) | 2002-01-04 |
FR2811072B1 (fr) | 2002-10-18 |
US6609559B2 (en) | 2003-08-26 |
JP2002054893A (ja) | 2002-02-20 |
EP1170566A3 (fr) | 2002-06-26 |
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