EP1098158B1 - Installation for managing solid elements circulating in a heat exchanger - Google Patents

Installation for managing solid elements circulating in a heat exchanger Download PDF

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Publication number
EP1098158B1
EP1098158B1 EP00403002A EP00403002A EP1098158B1 EP 1098158 B1 EP1098158 B1 EP 1098158B1 EP 00403002 A EP00403002 A EP 00403002A EP 00403002 A EP00403002 A EP 00403002A EP 1098158 B1 EP1098158 B1 EP 1098158B1
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Prior art keywords
pipe
heat exchanger
installation according
flow
control installation
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German (de)
French (fr)
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EP1098158A1 (en
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Philip Jackson
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E Beaudrey et Cie SA
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E Beaudrey et Cie SA
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    • 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 present invention relates more particularly to the management of the elements cleaning solids thus used.
  • this management involves, basically, on the one hand, to avoid that, with the flow that carries them, the solid cleaning elements in question are evacuated to the sewer, the interposition, on the outlet pipe of the heat exchanger, of means of interception specific to their detention, and, on the other hand, recycling, towards the inlet pipe of the heat exchanger, solid elements of cleaning thus retained by these means of interception.
  • this management device For its proper functioning, this management device needs to be crossed by a given flow flow.
  • a management facility for solid elements has been proposed. cleaning circulating in a heat exchanger-for cleaning thereof, of the kind comprising means of interception which, specific to the restraint of solid cleaning elements in circulation, are interposed on the pipeline outlet of the heat exchanger, a return line, which recycles to the inlet pipe of the heat exchanger a return flow containing the solid cleaning elements retained by the interception means, and, arranged on this return pipe, a device for managing these elements cleaning solids, installation in which between the means of interception and the management device, is interposed, on the return line, a concentration device dividing the corresponding return flow in half parts, namely, a first part, or main part, which contains normally all solid cleaning items, and that is directed to the management device, and a second part, or derived part, which is normally free of any solid cleaning material, and which is removed from the management system, the return line belonging to means of circulation which are capable of generating, locally, through means of interception, circulation against the current.
  • the management device is spared part of the flow rate return concerned, while normally seeing all the elements scroll cleaning solids to manage.
  • the concentration advantageously makes it possible to systematically recreate the input of the management device, determined flow conditions, which correspond to its normal operating conditions.
  • the subject of the present invention is a installation of the above kind characterized by the fact that the means of circulation include suction means adapted to resume, for their recycling, in accordance with the means of interception, the solid elements of cleaning retained by them, the concentration device being shaped general cylindrical and comprising a grid mounted to pivot about an axis that it presents in its central part so that it can occupy at least two extreme positions, a so-called “cleaning” position in which it leaves free passage of the main part of the return flow and intervenes in the passage of the derivative part of said flow, and a position known as "excluding cleaning” in which it is interposed in the passage of the main part and the part derived from the return flow.
  • the circulation means comprise a pipe inlet established between the heat exchanger outlet pipe and its inlet pipe and connected to the suction of a pump which discharges into the concentration device.
  • the management installation comprises a recycling which directs the derivative part of the return flow on the pipeline of heat exchanger outlet; the recycling line connects to the supply line via the concentration device.
  • Concentrating devices with tilting grids have already been proposed; more specifically, there is a concentration device in which two grids arranged in a V are pivotally mounted about an axis which they present in their central part and can occupy at least two positions in V, the tip of the V being at the bottom for one of these positions and at the top for the other ; such a concentration device has the disadvantage that cleaning elements are lost during said recovery operation elements.
  • the concentration device is connected to the recycling through a filter; thus, any loss of cleaning element is avoided.
  • the filter comprises a tubular wall which crosses axially sealing an enclosure, the part of the tubular wall located at the interior of the enclosure being provided with perforations; the tubular wall of the filter communicates with the concentration device via a valve.
  • the tubular wall of the filter communicates with the outside by through a valve.
  • the recycling pipe is connected to the wall external of the enclosure; the recycling line can be closed by a valve at right of its connection to the outer wall of the enclosure.
  • the upper part of the enclosure is provided with a vent closable.
  • 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
  • Such a heat exchanger 10 is well known in itself, and does not not directly related to the present invention, it will not be described here.
  • 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.
  • these solid cleaning elements are systematically injected into the inlet pipe 11, downstream of the filtration means 13, to be driven by the incoming flow.
  • a wheel 20 which closes the cuff 15 transversely and has, radially, between its axis and its periphery, a filter panel 21, which, under the control of means 22, is rotatably mounted about its axis, and, on the other hand, a horn 23, which is arranged in line with wheel 20, upstream in the direction of outgoing flow through outlet pipe 12, facing the panel filter 21 of the wheel 20.
  • the management installation 18 comprises circulation means which are suitable for locally generating, through interception means 17, at right of the fallopian tube 23, a circulation against the current, and which comprise, themselves, to do this, on the one hand, an inlet pipe 25, connecting more precisely at the horn 23, arranged upstream of the means interception 17, and, on the other hand, a return line 28, which recycles to the inlet pipe 11 of the heat exchanger 10 a return flow containing the solid cleaning elements retained by these means interception 17, and on which is arranged a device 26 for managing these solid cleaning elements, in particular for checking the number of these, of the elimination of those whose dimensions are no longer sufficient, and a replenishment of solid cleaning elements new.
  • a concentration device 27 capable of detecting the concentration of the corresponding return flow of solid cleaning elements.
  • a device for concentration 27 dividing the corresponding return flow into two parts at know, as shown schematically by the arrows P1, P2 in the figure, a part P1, or main part, which contains all the solid cleaning elements in traffic, and which is directed to the management device 26, and a second part P2, or derived part, which is devoid of any solid element of cleaning, and which is moved away from this management device 26 and directed towards the outlet pipe 12 of the heat exchanger 10 via a line 29 called recycling; more precisely, in this form of implementation, this recycling line 29 is connected to the outlet sleeve 15; more specifically, again, the circulation means comprising a pump 24 of which the suction is connected to this inlet pipe 25, the recycling pipe 29 connects downstream of this pump 24 to the concentration device 27 itself connected to the pump outlet 24.
  • the main part P1 corresponds to a minority of the flow of back processed, and the derivative part P2 to a majority of it.
  • the main part P1 is at relatively low speed, and the derived part P2 at relatively high speed.
  • the return pipe 28 dessert in the cuff 14, nozzles 32 which provide injection, in the incoming flow, solid cleaning elements to put back in or put in circulation in it, and which, preferably, are oriented against the current.
  • the management device 26 does not fall under the present invention, it does not will not be described in detail here. It will simply be noted that the management 26 includes two compartments separated by a grid 39, a first compartment 41 into which the second section 37 opens and a second compartment 42.
  • the two compartments 41 and 42 are connected, inter alia, to a distributor 43 for supplying the nozzles 32, the first 41 via a valve 44, the second 42 by means of a non-return valve 45.
  • a pipe outlet 33 connected to the recycling line 29, therefore to the outlet line 12 of the heat exchanger 10, for evacuation of the debris retained by these filtration means 13.
  • the device concentration 27 is generally cylindrical and has a grid 35, for example made up of bars whose spacing is less than the diameter solid cleaning elements; grid 35 is pivotally mounted around of an axis which it presents in its central part so that it can occupy at least two extreme positions, a so-called “cleaning” position, shown in solid lines in the figure and in which it leaves free the communication between the arrival pipe 25 and the management device 26, that is to say the passage of the main part P1 of the return flow, while it is interposed in the passage of the derived part P2 of said flow, and a position called “excluding cleaning", shown in dotted lines in the figure, in which it intervenes both in the passage of the main part P1 and in that of the derivative part P2, that is to say over the entire return flow.
  • the device for concentration 27 is connected to the recycling line 29 via a filter 50.
  • the filter 50 comprises a tubular wall 51 which passes axially through a sealed enclosure 52; the tubular wall 51 communicates, on one side, with the lower part of the concentration device 27, via a valve 53, and, on the other side, with the outside, also via a valve 54; the part of the tubular wall 51 located inside the enclosure 52 is provided with perforations; the conduct of recycling 29 is connected to the external wall of the enclosure 52, to the part lower thereof, to the right of which it is closable by a valve 55; the upper part of the enclosure 52 carries a closable vent 56.
  • a non-return valve 46 and a valve 47 are also arranged on the recycling line 29.
  • valves 31 and 47 are open; they don't Indeed, it was only planned to facilitate certain maintenance operations.
  • the grid 35 of the concentration device 27 is in the "cleaning" position shown in FULL line, valves 53 and 55 are open, valves 44 and 54 are closed, the vent 56 is closed, the pump 24 turns and the pump 30 is at rest.
  • the cleaning elements are stored upstream of the grid 39 and the valve 44 of the management device 26; the flow taken by the pump 24 returns to the outlet pipe 12 via the concentration device 27, the filter 50 and the recycling line 29.
  • the solid cleaning elements therefore pass continuously the heat exchanger 10 and, retained by the interception means 17 at the out of it, are sucked by pump 24 and recycled afterwards, successively, their passage through the concentration device 27, which separates from most of the corresponding flow, and their passage through the management device 26, which processes it.
  • valve 44 of the management device 26 is closed, where the cleaning elements are stopped by its grid 39.
  • the installation according to the invention is simple, light and economical, and whatever the operation of managing the elements of none of these can be lost.
  • the concentration device 27 the flow conditions at the input of the management device 26 are well determined, and they correspond to the normal operating conditions of this management 26.

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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)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

The installation for the control of cleaning solids circulating in a heat exchanger (10) comprises a solid interception means (17) interposed in the exchanger outlet pipe (12). A pump (24) produces a counter flow through the interception means and its suction recovers the cleaning solids held by it. Return piping (28) recycles a return flow containing solid cleaning elements to the exchanger inlet pipe (11). A concentration device, comprising a pivoting grille (35), divides the return flow into two parts (P1,P2). The first part contains all the solid cleaning elements and the second part contains no cleaning solids.

Description

La présente invention concerne d'une manière générale les échangeurs de chaleur, et, par exemple, les échangeurs de chaleur tubulaires formant condenseurs, dont le nettoyage est assuré en continu par des éléments solides, en pratique en forme de boule et réalisés par exemple en caoutchouc mousse, mis systématiquement en circulation à cet effet dans l'un des flux concernés.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.

Dans leur principe, les dispositions correspondantes sont connues de longue date, notamment par les documents US-A-1 795 348 et DE-A-23 14 329.In principle, the corresponding provisions are known from long-standing, notably by documents US-A-1,795,348 and DE-A-23 14,329.

La présente invention vise plus particulièrement la gestion des éléments solides de nettoyage ainsi mis en oeuvre.The present invention relates more particularly to the management of the elements cleaning solids thus used.

Suivant des dispositions qui peuvent par exemple être du type de celles décrites dans le document FR-A-2 716 530, cette gestion implique, fondamentalement, d'une part, pour éviter que, avec le flux qui les véhicule, les éléments solides de nettoyage en cause soient évacués à l'égout, l'interposition, sur la canalisation de sortie de l'échangeur de chaleur, de moyens d'interception propres à leur retenue, et, d'autre part, le recyclage, vers la canalisation d'entrée de l'échangeur de chaleur, des éléments solides de nettoyage ainsi retenus par ces moyens d'interception.According to provisions which may for example be of the type of those described in document FR-A-2 716 530, this management involves, basically, on the one hand, to avoid that, with the flow that carries them, the solid cleaning elements in question are evacuated to the sewer, the interposition, on the outlet pipe of the heat exchanger, of means of interception specific to their detention, and, on the other hand, recycling, towards the inlet pipe of the heat exchanger, solid elements of cleaning thus retained by these means of interception.

Mais, dans la pratique, il est également nécessaire de faire passer systématiquement les éléments solides de nettoyage à travers un dispositif de gestion propre, notamment, à en contrôler le nombre, à trier, et à éliminer, ceux dont les dimensions sont devenues, par usure, inférieures à celles requises, et à permettre, en conséquence, un réapprovisionnement de l'ensemble en éléments solides de nettoyage neufs.But, in practice, it is also necessary to pass systematically the solid elements of cleaning through a device of own management, in particular, to control the number, to sort, and to eliminate, those whose dimensions have become, by wear, smaller than those required, and to allow, accordingly, a replenishment of the set of new solid cleaning elements.

Pour son bon fonctionnement, ce dispositif de gestion nécessite d'être traversé par un flux de débit donné.For its proper functioning, this management device needs to be crossed by a given flow flow.

On a proposé une installation de gestion pour éléments solides de nettoyage circulant dans un échangeur de chaleur-pour le nettoyage de celui-ci, du genre comportant des moyens d'interception qui, propres à la retenue des éléments solides de nettoyage en circulation, sont interposés sur la canalisation de sortie de l'échangeur de chaleur, une conduite de retour, qui recycle vers la canalisation d'entrée de l'échangeur de chaleur un flux de retour contenant les éléments solides de nettoyage retenus par les moyens d'interception, et, disposé sur cette conduite de retour, un dispositif de gestion de ces éléments solides de nettoyage, installation dans laquelle, entre les moyens d'interception et le dispositif de gestion, se trouve interposé, sur la conduite de retour, un dispositif de concentration divisant le flux de retour correspondant en deux parties, à savoir, une première partie, ou partie principale, qui contient normalement tous les éléments solides de nettoyage, et qui est dirigée vers le dispositif de gestion, et une deuxième partie, ou partie dérivée, qui est normalement dépourvue de tout élément solide de nettoyage, et qui est écartée du dispositif de gestion, la conduite de retour appartenant à des moyens de circulation qui sont propres à engendrer, localement, à travers les moyens d'interception, une circulation à contre-courant.A management facility for solid elements has been proposed. cleaning circulating in a heat exchanger-for cleaning thereof, of the kind comprising means of interception which, specific to the restraint of solid cleaning elements in circulation, are interposed on the pipeline outlet of the heat exchanger, a return line, which recycles to the inlet pipe of the heat exchanger a return flow containing the solid cleaning elements retained by the interception means, and, arranged on this return pipe, a device for managing these elements cleaning solids, installation in which between the means of interception and the management device, is interposed, on the return line, a concentration device dividing the corresponding return flow in half parts, namely, a first part, or main part, which contains normally all solid cleaning items, and that is directed to the management device, and a second part, or derived part, which is normally free of any solid cleaning material, and which is removed from the management system, the return line belonging to means of circulation which are capable of generating, locally, through means of interception, circulation against the current.

Une telle installation est par exemple décrite dans le document FR-A-2 766 915.Such an installation is for example described in the document FR-A-2 766,915.

Ainsi, le dispositif de gestion est épargné d'une partie du débit du flux de retour concerné, tout en voyant normalement défiler la totalité des éléments solides de nettoyage à gérer.Thus, the management device is spared part of the flow rate return concerned, while normally seeing all the elements scroll cleaning solids to manage.

Plus précisément, pour une installation donnée, le dispositif de concentration permet avantageusement de recréer, systématiquement, à l'entrée du dispositif de gestion, des conditions de débit déterminées, qui correspondent à ses conditions normales de fonctionnement.More specifically, for a given installation, the concentration advantageously makes it possible to systematically recreate the input of the management device, determined flow conditions, which correspond to its normal operating conditions.

Ainsi, quelle que soit la capacité de l'installation à traiter, un dispositif de gestion standard peut avantageusement être mis en oeuvre, au bénéfice des coûts.Thus, whatever the capacity of the installation to be treated, a device for standard management can advantageously be implemented, for the benefit of costs.

D'une manière générale, le recyclage, vers la canalisation d'entrée de l'échangeur de chaleur, des éléments solides de nettoyage retenus par les moyens d'interception est obtenu par des moyens de circulation qui poussent ou refoulent les éléments solides de nettoyage vers ladite canalisation d'entrée. Cette opération de refoulement s'effectue nécessairement au travers des moyens d'interception et conduit à une installation lourde, relativement compliquée.In general, recycling, to the inlet pipe of the heat exchanger, solid cleaning elements retained by the means of interception is obtained by means of circulation which push or discharge the solid cleaning elements towards said inlet pipe. This repression operation is necessarily carried out through means of interception and leads to a heavy installation, relatively complicated.

Pour éviter cet inconvénient, la présente invention a pour objet une installation du genre ci-dessus caractérisée par le fait que les moyens de circulation comprennent des moyens d'aspiration adaptés à reprendre, pour leur recyclage, au droit des moyens d'interception, les éléments solides de nettoyage retenus par ceux-ci, le dispositif de concentration étant de forme générale cylindrique et comportant une grille montée pivotante autour d'un axe qu'elle présente dans sa partie centrale en sorte qu'elle peut occuper au moins deux positions extrêmes, une position dite "de nettoyage" dans laquelle elle laisse libre le passage de la partie principale du flux de retour et s'interpose dans le passage de la partie dérivée dudit flux, et une position dite 'hors nettoyage" dans laquelle elle s'interpose dans le passage de la partie principale et de la partie dérivée du flux de retour.To avoid this drawback, the subject of the present invention is a installation of the above kind characterized by the fact that the means of circulation include suction means adapted to resume, for their recycling, in accordance with the means of interception, the solid elements of cleaning retained by them, the concentration device being shaped general cylindrical and comprising a grid mounted to pivot about an axis that it presents in its central part so that it can occupy at least two extreme positions, a so-called "cleaning" position in which it leaves free passage of the main part of the return flow and intervenes in the passage of the derivative part of said flow, and a position known as "excluding cleaning" in which it is interposed in the passage of the main part and the part derived from the return flow.

Avantageusement, les moyens de circulation comprennent une conduite d'arrivée établie entre la canalisation de sortie de l'échangeur de chaleur et sa canalisation d'entrée et reliée à l'aspiration d'une pompe qui refoule dans le dispositif de concentration.Advantageously, the circulation means comprise a pipe inlet established between the heat exchanger outlet pipe and its inlet pipe and connected to the suction of a pump which discharges into the concentration device.

De préférence, l'installation de gestion comporte une conduite de recyclage qui dirige la partie dérivée du flux de retour sur la canalisation de sortie de l'échangeur de chaleur ; la conduite de recyclage se raccorde à la conduite d'arrivée par l'intermédiaire du dispositif de concentration.Preferably, the management installation comprises a recycling which directs the derivative part of the return flow on the pipeline of heat exchanger outlet; the recycling line connects to the supply line via the concentration device.

On a déjà proposé des dispositifs de concentration à grilles basculantes ; plus précisément, on connaít un dispositif de concentration dans lequel deux grilles disposées en V sont montées pivotantes autour d'un axe qu'elles présentent dans leur partie centrale et peuvent occuper au moins deux positions en V, la pointe du V étant en bas pour l'une de ces positions et en haut pour l'autre ; un tel dispositif de concentration présente l'inconvénient que des éléments de nettoyage sont perdus lors de l'opération de récupération desdits éléments. Concentrating devices with tilting grids have already been proposed; more specifically, there is a concentration device in which two grids arranged in a V are pivotally mounted about an axis which they present in their central part and can occupy at least two positions in V, the tip of the V being at the bottom for one of these positions and at the top for the other ; such a concentration device has the disadvantage that cleaning elements are lost during said recovery operation elements.

Selon l'invention, le dispositif de concentration est relié à la conduite de recyclage par l'intermédiaire d'un filtre ; ainsi, toute perte d'élément de nettoyage est évitée.According to the invention, the concentration device is connected to the recycling through a filter; thus, any loss of cleaning element is avoided.

Avantageusement, le filtre comprend une paroi tubulaire qui traverse axialement à étanchéité une enceinte, la partie de la paroi tubulaire située à l'intérieur de l'enceinte étant munie de perforations ; la paroi tubulaire du filtre communique avec le dispositif de concentration par l'intermédiaire d'une vanne.Advantageously, the filter comprises a tubular wall which crosses axially sealing an enclosure, the part of the tubular wall located at the interior of the enclosure being provided with perforations; the tubular wall of the filter communicates with the concentration device via a valve.

De préférence, la paroi tubulaire du filtre communique avec l'extérieur par l'intermédiaire d'une vanne.Preferably, the tubular wall of the filter communicates with the outside by through a valve.

Avantageusement, la conduite de recyclage est raccordée à la paroi externe de l'enceinte ; la conduite de recyclage est obturable par une vanne au droit de son raccordement à la paroi externe de l'enceinte.Advantageously, the recycling pipe is connected to the wall external of the enclosure; the recycling line can be closed by a valve at right of its connection to the outer wall of the enclosure.

De préférence, la partie supérieure de l'enceinte est munie d'un évent obturable.Preferably, the upper part of the enclosure is provided with a vent closable.

Pour mieux faire comprendre l'objet de l'invention, on va en décrire maintenant, à titre d'exemple, purement illustratif et non limitatif, un mode de réalisation représenté sur la figure unique annexée.To better understand the object of the invention, we will describe now, by way of example, purely illustrative and not limiting, a mode of embodiment shown in the single figure attached.

Sur cette figure, on a schématisé, sous la référence générale 10, un échangeur de chaleur, et, par exemple, un échangeur de chaleur formant condenseur, qui, tel que schématisé par les flèches F1, est traversé par un flux de fluide de refroidissement, en l'espèce de l'eau, à la faveur, d'une part, d'une canalisation d'entrée 11, et, d'autre part, d'une canalisation de sortie 12.In this figure, we have schematized, 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.

Un tel échangeur de chaleur 10 étant bien connu par lui-même, et ne relevant pas, en propre, de la présente invention, il ne sera pas décrit ici.Such a heat exchanger 10 is well known in itself, and does not not directly related to the present invention, it will not be described here.

Il s'agit, en pratique, d'un échangeur de chaleur tubulaire qui, par exemple, est du type de celui succinctement décrit dans le document FR-A-2 716 530 mentionné ci-dessus.It is, in practice, a tubular heat exchanger which, by example, is of the type succinctly described in document FR-A-2 716,530 mentioned above.

Dans la forme de mise en oeuvre représentée, des moyens de filtration 13 sont interposés sur la canalisation d'entrée 11, à la faveur d'une manchette 14.In the embodiment shown, filtration means 13 are interposed on the inlet pipe 11, by means of a cuff 14.

Ces moyens de filtration 13, qui ne sont pas impératifs, ne relevant pas non plus de la présente invention, ils ne seront pas non plus décrits ici. Il s'agit par exemple de moyens de filtration du type de ceux décrits dans le document FR-A-2 609 644.These filtration means 13, which are not imperative, do not fall under neither of the present invention, they will not be described here either. It's about for example filtration means of the type described in the document FR-A-2 609 644.

De manière connue en soi, également, des éléments solides de nettoyage sont susceptibles d'être mis en circulation permanente dans l'échangeur de chaleur 10, pour le nettoyage en continu de celui-ci.In a manner known per se, also, solid elements of cleaning are likely to be put into permanent circulation in the heat exchanger 10, for continuous cleaning thereof.

Il s'agit, en pratique, de boules en caoutchouc mousse, dont le diamètre est légèrement supérieur à celui des tubes de l'échangeur de chaleur 10, et dont la densité, à l'état imprégné, est similaire à celle de l'eau.In practice, these are foam rubber balls, the diameter of which is slightly higher than that of the tubes of the heat exchanger 10, and whose density, in the impregnated state, is similar to that of water.

Il convient d'assurer une gestion de ces éléments solides de nettoyage, c'est-à-dire non seulement d'en assurer une circulation effective dans l'échangeur de chaleur 10, mais également d'en contrôler le nombre et les dimensions.These solid cleaning elements should be managed, that is to say not only to ensure an effective circulation in the heat exchanger 10, but also to control the number and the dimensions.

De manière connue en soi, ces éléments solides de nettoyage sont systématiquement injectés dans la canalisation d'entrée 11, en aval des moyens de filtration 13, pour être entraínés par le flux entrant.In a manner known per se, these solid cleaning elements are systematically injected into the inlet pipe 11, downstream of the filtration means 13, to be driven by the incoming flow.

De manière connue en soi, également, on interpose, corollairement, sur la canalisation de sortie 12, à la faveur d'une manchette 15, des moyens d'interception 17 propres à la retenue des éléments solides de nettoyage en circulation, et, par une installation de gestion 18 détaillée ci-après, on recycle, vers la canalisation d'entrée 11, les éléments solides de nettoyage retenus par ces moyens d'interception 17.In a manner known per se, also, we interpose, as a corollary, on the outlet pipe 12, by means of a sleeve 15, means interception 17 specific to the retention of solid cleaning elements in circulation, and, by a management installation 18 detailed below, we recycle, towards the inlet pipe 11, the solid cleaning elements retained by these means of interception 17.

Ne relevant pas, par eux-mêmes, de la présente invention, ces moyens d'interception 17 ne seront pas décrits en détail ici. Par exemple, il s'agit de . moyens de filtration du type de ceux faisant l'objet du document FR-A-2 715 530 mentionné ci-dessus.Not pertaining, by themselves, to the present invention, these means interception 17 will not be described in detail here. For example, it’s . filtration means of the type of those covered in document FR-A-2 715,530 mentioned above.

Il suffira donc d'indiquer qu'ils comportent, d'une part, une roue 20 qui ferme transversalement la manchette 15 et présente, radialement, entre son axe et sa périphérie, un panneau filtrant 21, et qui, sous le contrôle de moyens de commande 22, est montée rotative autour de son axe, et, d'autre part, une trompe 23, qui est disposée au droit de la roue 20, en amont dans le sens du flux sortant par la canalisation de sortie 12, en étant tournée vers le panneau filtrant 21 de la roue 20. It will therefore suffice to indicate that they comprise, on the one hand, a wheel 20 which closes the cuff 15 transversely and has, radially, between its axis and its periphery, a filter panel 21, which, under the control of means 22, is rotatably mounted about its axis, and, on the other hand, a horn 23, which is arranged in line with wheel 20, upstream in the direction of outgoing flow through outlet pipe 12, facing the panel filter 21 of the wheel 20.

L'installation de gestion 18 comporte des moyens de circulation qui sont propres à engendrer, localement, à travers les moyens d'interception 17, au droit de la trompe 23, une circulation à contre-courant, et qui comportent, eux-mêmes, pour ce faire, d'une part, une conduite d'arrivée 25, se raccordant plus précisément à la trompe 23, disposée en amont des moyens d'interception 17, et, d'autre part, une conduite de retour 28, qui recycle vers la canalisation d'entrée 11 de l'échangeur de chaleur 10 un flux de retour contenant les éléments solides de nettoyage retenus par ces moyens d'interception 17, et sur laquelle est disposé un dispositif de gestion 26 de ces éléments solides de nettoyage, en vue, notamment, d'un contrôle du nombre de ceux-ci, de l'élimination de ceux dont les dimensions ne sont plus suffisantes, et d'un réapprovisionnement en éléments solides de nettoyage neufs.The management installation 18 comprises circulation means which are suitable for locally generating, through interception means 17, at right of the fallopian tube 23, a circulation against the current, and which comprise, themselves, to do this, on the one hand, an inlet pipe 25, connecting more precisely at the horn 23, arranged upstream of the means interception 17, and, on the other hand, a return line 28, which recycles to the inlet pipe 11 of the heat exchanger 10 a return flow containing the solid cleaning elements retained by these means interception 17, and on which is arranged a device 26 for managing these solid cleaning elements, in particular for checking the number of these, of the elimination of those whose dimensions are no longer sufficient, and a replenishment of solid cleaning elements new.

Est interposé, entre les moyens d'interception 17 et le dispositif de gestion 26, un dispositif de concentration 27 apte à relever la concentration du flux de retour correspondant en éléments solides de nettoyage.Is interposed between the interception means 17 and the management 26, a concentration device 27 capable of detecting the concentration of the corresponding return flow of solid cleaning elements.

Autrement dit, sur la conduite de retour 25 se trouve interposé, entre les moyens d'interception 17 et le dispositif de gestion 26, un dispositif de concentration 27 divisant le flux de retour correspondant en deux parties, à savoir, tel que schématisé par les flèches P1, P2 sur la figure, une partie P1, ou partie principale, qui contient tous les éléments solides de nettoyage en circulation, et qui est dirigée vers le dispositif de gestion 26, et une deuxième partie P2, ou partie dérivée, qui est dépourvue de tout élément solide de nettoyage, et qui est écartée de ce dispositif de gestion 26 et dirigée sur la canalisation de sortie 12 de l'échangeur de chaleur 10 par une conduite 29 dite de recyclage ; plus précisément, dans cette forme de mise en oeuvre, cette conduite de recyclage 29 se raccorde à la manchette de sortie 15 ; plus précisément, encore, les moyens de circulation comportant une pompe 24 dont l'aspiration est reliée à cette conduite d'arrivée 25, la conduite de recyclage 29 se raccorde en aval de cette pompe 24 au dispositif de concentration 27 lui-même relié au refoulement de la pompe 24. In other words, on the return pipe 25 is interposed, between the interception means 17 and the management device 26, a device for concentration 27 dividing the corresponding return flow into two parts, at know, as shown schematically by the arrows P1, P2 in the figure, a part P1, or main part, which contains all the solid cleaning elements in traffic, and which is directed to the management device 26, and a second part P2, or derived part, which is devoid of any solid element of cleaning, and which is moved away from this management device 26 and directed towards the outlet pipe 12 of the heat exchanger 10 via a line 29 called recycling; more precisely, in this form of implementation, this recycling line 29 is connected to the outlet sleeve 15; more specifically, again, the circulation means comprising a pump 24 of which the suction is connected to this inlet pipe 25, the recycling pipe 29 connects downstream of this pump 24 to the concentration device 27 itself connected to the pump outlet 24.

En pratique, la partie principale P1 correspond à une minorité du flux de retour traité, et la partie dérivée P2 à une majorité de celui-ci. Autrement dit, la partie principale P1 est à relativement petit débit, et la partie dérivée P2 à relativement grand débit.In practice, the main part P1 corresponds to a minority of the flow of back processed, and the derivative part P2 to a majority of it. In other words, the main part P1 is at relatively low speed, and the derived part P2 at relatively high speed.

Dans la forme de mise en oeuvre représentée, il est prévu, sur la conduite d'arrivée 25, en amont du dispositif de concentration 27, une vanne 31, et il est prévu, en aval de ce dispositif de concentration 27, sur la conduite de retour 28, une pompe 30 disposée entre deux tronçons, un premier tronçon 36 et un second tronçon 37, de la canalisation de retour 28, le dispositif de gestion 26 étant en aval du second tronçon 37, le premier tronçon 36 étant issu latéralement de la partie inférieure du dispositif de concentration 27.In the embodiment shown, provision is made, on the inlet pipe 25, upstream of the concentration device 27, a valve 31, and it is provided, downstream of this concentration device 27, on the pipe return 28, a pump 30 disposed between two sections, a first section 36 and a second section 37, of the return pipe 28, the management 26 being downstream of the second section 37, the first section 36 being laterally from the lower part of the concentration device 27.

Préférentiellement, et tel que représenté, la conduite de retour 28 dessert, dans la manchette 14, des tuyères 32 qui assurent l'injection, dans le flux entrant, des éléments solides de nettoyage à remettre ou à mettre en circulation dans celui-ci, et qui, préférentiellement, sont orientées à contre-courant.Preferably, and as shown, the return pipe 28 dessert, in the cuff 14, nozzles 32 which provide injection, in the incoming flow, solid cleaning elements to put back in or put in circulation in it, and which, preferably, are oriented against the current.

Le dispositif de gestion 26 ne relevant pas de la présente invention, il ne sera pas décrit en détails ici. Il sera simplement noté que le dispositif de gestion 26 comprend deux compartiments séparés par une grille 39, un premier compartiment 41 dans lequel débouche le second tronçon 37 et un second compartiment 42.The management device 26 does not fall under the present invention, it does not will not be described in detail here. It will simply be noted that the management 26 includes two compartments separated by a grid 39, a first compartment 41 into which the second section 37 opens and a second compartment 42.

Les deux compartiments 41 et 42 sont reliés, entre autres, à un distributeur 43 d'alimentation des tuyères 32, le premier 41 par l'intermédiaire d'une vanne 44, le second 42 par l'intermédiaire d'un clapet anti-retour 45.The two compartments 41 and 42 are connected, inter alia, to a distributor 43 for supplying the nozzles 32, the first 41 via a valve 44, the second 42 by means of a non-return valve 45.

Dans la forme de mise en oeuvre représentée, une conduite d'évacuation 33, contrôlée par une vanne 34, relie les moyens de filtration 13 à la conduite de recyclage 29, donc à la canalisation de sortie 12 de l'échangeur de chaleur 10, pour une évacuation des débris retenus par ces moyens de filtration 13.In the embodiment shown, a pipe outlet 33, controlled by a valve 34, connects the filtration means 13 to the recycling line 29, therefore to the outlet line 12 of the heat exchanger 10, for evacuation of the debris retained by these filtration means 13.

Dans la forme de mise en oeuvre représentée, le dispositif de concentration 27 est de forme générale cylindrique et comporte une grille 35, par exemple constituée de barreaux dont l'écartement est inférieur au diamètre des éléments solides de nettoyage ; la grille 35 est montée pivotante autour d'un axe qu'elle présente dans sa partie centrale en sorte qu'elle peut occuper au moins deux positions extrêmes, une position dite "de nettoyage", représentée en trait plein sur la figure et dans laquelle elle laisse libre la communication entre la conduite d'arrivée 25 et le dispositif de gestion 26, c'est-à-dire le passage de la partie principale P1 du flux de retour, tandis qu'elle s'interpose dans le passage de la partie dérivée P2 dudit flux, et une position dite "hors nettoyage", représentée en pointillés sur la figure, dans laquelle elle s'interpose tant dans le passage de la partie principale P1 que dans celui de la partie dérivée P2, c'est-à-dire sur la totalité du flux de retour.In the embodiment shown, the device concentration 27 is generally cylindrical and has a grid 35, for example made up of bars whose spacing is less than the diameter solid cleaning elements; grid 35 is pivotally mounted around of an axis which it presents in its central part so that it can occupy at least two extreme positions, a so-called "cleaning" position, shown in solid lines in the figure and in which it leaves free the communication between the arrival pipe 25 and the management device 26, that is to say the passage of the main part P1 of the return flow, while it is interposed in the passage of the derived part P2 of said flow, and a position called "excluding cleaning", shown in dotted lines in the figure, in which it intervenes both in the passage of the main part P1 and in that of the derivative part P2, that is to say over the entire return flow.

Selon une autre caractéristique importante de l'invention, le dispositif de concentration 27 est relié à la conduite de recyclage 29 par l'intermédiaire d'un filtre 50.According to another important characteristic of the invention, the device for concentration 27 is connected to the recycling line 29 via a filter 50.

Plus précisément, le filtre 50 comprend une paroi tubulaire 51 qui traverse axialement à étanchéité une enceinte 52 ; la paroi tubulaire 51 communique, d'un côté, avec la partie inférieure du dispositif de concentration 27, par l'intermédiaire d'une vanne 53, et, de l'autre côté, avec l'extérieur, également par l'intermédiaire d'une vanne 54 ; la partie de la paroi tubulaire 51 située à l'intérieur de l'enceinte 52 est munie de perforations ; la conduite de recyclage 29 est raccordée à la paroi externe de l'enceinte 52, à la partie inférieure de celle-ci, au droit de laquelle elle est obturable par une vanne 55 ; la partie supérieure de l'enceinte 52 porte un évent obturable 56.More specifically, the filter 50 comprises a tubular wall 51 which passes axially through a sealed enclosure 52; the tubular wall 51 communicates, on one side, with the lower part of the concentration device 27, via a valve 53, and, on the other side, with the outside, also via a valve 54; the part of the tubular wall 51 located inside the enclosure 52 is provided with perforations; the conduct of recycling 29 is connected to the external wall of the enclosure 52, to the part lower thereof, to the right of which it is closable by a valve 55; the upper part of the enclosure 52 carries a closable vent 56.

Un clapet anti-retour 46 et une vanne 47 sont également disposés sur la conduite de recyclage 29.A non-return valve 46 and a valve 47 are also arranged on the recycling line 29.

Le fonctionnement de l'installation qui vient d'être décrite est le suivant.The operation of the installation which has just been described is as follows.

Dans tous les cas, les vannes 31 et 47 sont ouvertes ; elles n'ont en effet été prévues que pour faciliter certaines opérations de maintenance.In all cases, the valves 31 and 47 are open; they don't Indeed, it was only planned to facilitate certain maintenance operations.

Normalement, hors nettoyage des tubes de l'échangeur de chaleur 10, la grille 35 du dispositif de concentration 27 est en position "nettoyage" représentée en trait PLEIN, les vannes 53 et 55 sont ouvertes, les vannes 44 et 54 sont fermées, l'évent 56 est fermé, la pompe 24 tourne et la pompe 30 est au repos. Normally, apart from cleaning the tubes of the heat exchanger 10, the grid 35 of the concentration device 27 is in the "cleaning" position shown in FULL line, valves 53 and 55 are open, valves 44 and 54 are closed, the vent 56 is closed, the pump 24 turns and the pump 30 is at rest.

Ainsi, les éléments de nettoyage sont stockés en amont de la grille 39 et de la vanne 44 du dispositif de gestion 26 ; le flux prélevé par la pompe 24 retourne à la canalisation de sortie 12 via le dispositif de concentration 27, le filtre 50 et la conduite de recyclage 29.Thus, the cleaning elements are stored upstream of the grid 39 and the valve 44 of the management device 26; the flow taken by the pump 24 returns to the outlet pipe 12 via the concentration device 27, the filter 50 and the recycling line 29.

Pour nettoyer les tubes de l'échangeur de chaleur 10, il suffit d'ouvrir la vanne 44 et de mettre en fonctionnement la pompe 30.To clean the tubes of the heat exchanger 10, simply open the valve 44 and start the pump 30.

En service, les éléments solides de nettoyage traversent donc en continu l'échangeur de chaleur 10 et, retenus par les moyens d'interception 17 à la sortie de celui-ci, sont aspirés par la pompe 24 et recyclés après, successivement, leur passage dans le dispositif de concentration 27, qui les sépare de la plus grande partie du débit correspondant, et leur passage dans le dispositif de gestion 26, qui en assure le traitement.In service, the solid cleaning elements therefore pass continuously the heat exchanger 10 and, retained by the interception means 17 at the out of it, are sucked by pump 24 and recycled afterwards, successively, their passage through the concentration device 27, which separates from most of the corresponding flow, and their passage through the management device 26, which processes it.

Pour arrêter la circulation des éléments de nettoyage, et les rassembler, on ferme la vanne 44 du dispositif de gestion 26 où les éléments de nettoyage sont arrêtés par sa grille 39.To stop the circulation of cleaning elements, and collect them, the valve 44 of the management device 26 is closed, where the cleaning elements are stopped by its grid 39.

Il est possible d'effectuer plus rapidement une telle opération en basculant la grille 35 en position "hors nettoyage", représentée en pointillés, du dispositif de concentration 27.It is possible to perform this operation more quickly by tilting the grid 35 in the "non-cleaning" position, shown in dotted lines, of the concentration device 27.

C'est à partir de cette position de la grille 35 qu'il est possible d'extraire de l'installation les éléments de nettoyage ; pour ce faire, dans un premier temps, on rebascule la grille 35 vers sa position de nettoyage, ce qui conduit les éléments de nettoyage à rejoindre l'intérieur de la paroi tubulaire perforée 51 ; dans un deuxième temps, on arrête les pompes 24 et 30, et on ferme les vannes 53 et 55, ce qui isole le filtre 50 de l'installation ; en ouvrant l'évent 56 et la vanne 54, on vide le filtre 50, par exemple dans un récipient 57 placé sous celui-ci.It is from this position of the grid 35 that it is possible to extract cleaning elements from the installation; to do this, in a first time, the grid 35 is moved back to its cleaning position, which leads the cleaning elements to join the inside of the perforated tubular wall 51; in a second step, we stop pumps 24 and 30, and we close the valves 53 and 55, which isolates the filter 50 from the installation; opening the vent 56 and the valve 54, the filter 50 is emptied, for example in a container 57 placed under this one.

Comme on le voit l'installation selon l'invention est simple, légère et économique, et quelle que soit l'opération de gestion des éléments de nettoyage, aucun de ceux-ci ne peut être perdu.As can be seen, the installation according to the invention is simple, light and economical, and whatever the operation of managing the elements of none of these can be lost.

Grâce au dispositif de concentration 27, les conditions de débit à l'entrée du dispositif de gestion 26 sont bien déterminées, et elles correspondent aux conditions normales de fonctionnement de ce dispositif de gestion 26.Thanks to the concentration device 27, the flow conditions at the input of the management device 26 are well determined, and they correspond to the normal operating conditions of this management 26.

Claims (11)

  1. Control installation for solid cleaning members circulating in a heat exchanger (10) to clean it, of the kind including interception means (17) which, adapted to retain the circulating solid cleaning members, are interposed on the outlet pipe (12) of the heat exchanger (10), a return pipe (28), which recycles towards the inlet pipe (11) of the heat exchanger (10) a return flow containing the solid cleaning members retained by the interception means (17), and, disposed on that return pipe (28), a control device (26) for the solid cleaning members, in which installation, between the interception means (17) and the control device (26), there is interposed, on the return pipe (28), a concentration device (27) dividing the corresponding return flow into two parts (P1, P2), namely, a first part (P1), or principal part, which normally contains all of the solid cleaning members, and which is directed towards the control device (26), and a second part (P2), or diverted part, which normally contains no solid cleaning members, and which is separated from the control device (26), the return pipe (28) forming part of circulation means which are adapted to generate, locally, via the interception means (17), a counter-current flow, characterized in that the circulation means include suction means adapted to take up, to recycle them, in line with the interception means, the solid cleaning members retained thereby, the concentration device (27) being of generally cylindrical shape and including a grid (35) mounted to pivot about an axis in its central part so that it can occupy at least two extreme positions, namely a position referred to as a "cleaning" position in which it allows free passage of the principal part (P1) of the return flow and is interposed in the passage of the diverted part (P2) of said flow, and a position referred to as a "non-cleaning" position in which it is interposed in the passage of the principal part (P1) and the diverted part (P2) of the return flow.
  2. Control installation according to claim 1, characterized in that the circulation means include a flow pipe (25) established between the outlet pipe (12) of the heat exchanger (10) and its inlet pipe (11) and connected to the suction of a pump (24) which discharges into the concentration device (27).
  3. Control installation according to either claim 1 or claim 2, characterized in that it includes a recycling pipe (29) which directs the diverted part (P2) of the return flow to the outlet pipe (12) of the heat exchanger (10).
  4. Control installation according to claim 3, characterized in that the recycling pipe (29) is connected to the flow pipe (25) via the concentration device (27).
  5. Control installation according to either claim 3 or claim 4, characterized in that the concentration device (27) is connected to the recycling pipe (29) via a filter (50).
  6. Control installation according to claim 5, characterized in that the filter (50) has a tubular wall (51) which passes axially and in a sealed manner through an enclosure (52), the part of the tubular wall (51) situated inside the enclosure (52) being perforated.
  7. Control installation according to claim 6, characterized in that the tubular wall (51) of the filter (50) communicates with the concentration device (27) via a valve (53).
  8. Control installation according to either claim 6 or claim 7, characterized in that the tubular wall (51) of the filter (50) communicates with the outside via a valve (54).
  9. Control installation according to any of claims 6 to 8, characterized in that the recycling pipe (29) is connected to the outside wall of the enclosure (52).
  10. Control installation according to claim 9, characterized in that the recycling pipe (29) is adapted to be shut off by a valve (55) in line with its connection to the outside wall of the enclosure (52).
  11. Control installation according to any of claims 6 to 10, characterized in that the upper part of the enclosure (52) is provided with a vent (56) which is adapted to be shut off.
EP00403002A 1999-11-04 2000-10-27 Installation for managing solid elements circulating in a heat exchanger Expired - Lifetime EP1098158B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9913813A FR2800864B1 (en) 1999-11-04 1999-11-04 INSTALLATION FOR MANAGING SOLID ELEMENTS CIRCULATED IN A HEAT EXCHANGER FOR CLEANING THE SAME
FR9913813 1999-11-04

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EP1098158A1 EP1098158A1 (en) 2001-05-09
EP1098158B1 true EP1098158B1 (en) 2004-05-06

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US (1) US6530427B1 (en)
EP (1) EP1098158B1 (en)
JP (1) JP2001165594A (en)
AT (1) ATE266185T1 (en)
DE (1) DE60010410T2 (en)
ES (1) ES2220367T3 (en)
FR (1) FR2800864B1 (en)

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JP2001165594A (en) 2001-06-22
DE60010410T2 (en) 2005-05-19
US6530427B1 (en) 2003-03-11
EP1098158A1 (en) 2001-05-09
ES2220367T3 (en) 2004-12-16
DE60010410D1 (en) 2004-06-09
ATE266185T1 (en) 2004-05-15
FR2800864B1 (en) 2002-03-22
FR2800864A1 (en) 2001-05-11

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