EP0053355A1 - Cleaning element and cleaning installation for application of the element - Google Patents

Cleaning element and cleaning installation for application of the element Download PDF

Info

Publication number
EP0053355A1
EP0053355A1 EP81109896A EP81109896A EP0053355A1 EP 0053355 A1 EP0053355 A1 EP 0053355A1 EP 81109896 A EP81109896 A EP 81109896A EP 81109896 A EP81109896 A EP 81109896A EP 0053355 A1 EP0053355 A1 EP 0053355A1
Authority
EP
European Patent Office
Prior art keywords
cleaning
fluid
grain
installation
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81109896A
Other languages
German (de)
French (fr)
Other versions
EP0053355B1 (en
Inventor
Elie Condolios
Jacques Duport
Michel Rey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom SA
Original Assignee
Alsthom Atlantique SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alsthom Atlantique SA filed Critical Alsthom Atlantique SA
Priority to AT81109896T priority Critical patent/ATE5746T1/en
Publication of EP0053355A1 publication Critical patent/EP0053355A1/en
Application granted granted Critical
Publication of EP0053355B1 publication Critical patent/EP0053355B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0325—Control mechanisms therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/057—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices being entrained discrete elements, e.g. balls, grinding elements, brushes
    • 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 to the cleaning of industrial containers or devices in which circulates a fluid capable of leaving biological or mineral deposits.
  • the invention relates to the cleaning of exchangers, whether they are tubular, plate or serpentine.
  • the system has been improved by using, for cleaning the tube condensers, balls, driven by the fluid and describing a closed circuit inside the device to be cleaned.
  • balls which have a diameter close to that of the tubes to be cleaned, wear out quickly; moreover, the system cannot be used for cleaning certain types of exchangers such as plate or coil exchangers.
  • these abrasives have the defect of wearing down the container to be cleaned and of accumulating in certain parts of the container where the speed of the fluid is lower, which makes their use impossible in certain types of exchangers.
  • the subject of the invention is a cleaning element of an industrial device in which a fluid capable of causing mineral and biological deposits circulates, said cleaning element being introduced in large numbers into the fluid and acting by mechanical action on the walls of the device, element characterized in that it consists of an artificial grain of a mixture of synthetic materials capable of withstanding a temperature of up to 150 degrees, the grain having a relative density of between 0.8 and 1.5 relative to the density of said fluid and an average diameter between 40 and 6000 microns.
  • the grain has in all cases an average diameter less than or equal to one third of the equivalent hydraulic diameter of the walls to be cleaned, the equivalent diameter being equal to 4 times the ratio of the section of the passage of the fluid to the wet perimeter.
  • the grain advantageously consists of a mixture of polypropylene and calcium carbonate.
  • the grain is loaded with abrasive particles, regularly distributed within the grain and the material of which is preferably chosen from quartz and corundum.
  • Figure 1 shows, seen in cross section, a cleaning element 1 according to the invention, which applies to soft fouling.
  • the grain will have an average diameter less than or equal to one third of the equivalent hydraulic diameter of the walls to be cleaned. This diameter is equal to 4 - where S is the cross section of the fluid and p the perimeter of the wet surface.
  • the equivalent diameter is equal to 2e, if L is large in front of e.
  • the element is made of a mixture of plastic and various components; the proportions of the various components are chosen so that the relative density relative to that of the fluid is between 0.8 and 1.5.
  • This density interval has a double advantage: the element is of sufficiently low density not to accumulate in the parts of the device where the fluid flow speed is lower; on the other hand, its density can be chosen sufficiently different from that of the working fluid of the device (generally water when the device is a heat exchanger), in order to be able to be separated from the fluid by means of a separator included in an installation cleaning, as will be described later.
  • the element is made from polypropylene with a density close to 0.8, mixed with calcium carbonate, density 2.7 in selected proportions, to ensure the finished element a relative density included in the range indicated above.
  • the elements are obtained by a hot compounding process.
  • cleaning elements of the type of that of FIG. 2 are preferably used, substantially spherical and which differs from that of FIG. 1 in that it contains, embedded in its interior, abrasive particles 2, such as corundum, silica, or quartz powder.
  • the cleaning elements can be conventionally used to clean an installation whose operation is previously stopped.
  • FIG. 3 Such an installation is shown diagrammatically in FIG. 3.
  • a device to be cleaned 10 which is for example a heat exchange, receiving a cold fluid (water) by an inlet pipe 11 by a pump 12, this fluid leaving the device by an outlet pipe 13.
  • Valves 14 and 15 allow the device to be isolated in order to clean it.
  • the cleaning installation comprises in parallel on the device 10 from the outlet to the inlet thereof a circuit composed successively of a liquid-solid separator 30, a storage silo 40, a metering device 45 and a cleaning pump 50.
  • a pipe 60 furthermore connects the outlet of the device 10 and the inlet of the pump 50 and makes it possible to circulate in bypass when the fluid at the desired concentration of elements.
  • a pipe 61 connects via a valve 62 the upper part of the separator to the pipe 60. It recycles the liquid until the complete separation of the elements of the fluid.
  • a pipe 63 connects, via a valve 64, the top of the storage silo 40 to the pipe 60; it allows the concentration of the fluid.
  • a pipe 65 isolated by a valve 66, allows the rejection of biological suspensions from cleaning.
  • a pipe 70 starting from the top of the storage silo 40 allows the elements to fluidize.
  • This pipe is connected to the base from the silo via a pipe 71 via a valve 72 and a pump 73.
  • Valves 41, 51, 67 and 81 complete the device.
  • the separator is isolated by closing the valves 31 and 62.
  • the valves 12, 64, 41 and 72 are open; valve 67 is closed.
  • the dosing in concentration of cleaning elements is carried out by the fluidization of a part of the elements contained in the storage silo 40.
  • the fluidization is obtained by injecting a low flow of water with the pump 73.
  • the concentration measurement is determined by the metering device 45.
  • valves 31, 62, 64 and 41 are closed; the valves 12 and 67 are open.
  • the cleaning is done by circulation of the fluid loaded with cleaning element outside the separator 30 and the storage silo 40.
  • the concentration of elements is advantageously from 5 to 15%.
  • the flow speed can be between 0.2 and 1.5 m / s for tubing with a diameter less than 8 mm, and between 0.8 and 4 m / s for tubing with a diameter greater than 8 mm.
  • a cleaning time of 15 minutes is usually sufficient if it is repeated periodically (for example, monthly).
  • the third phase consists in recovering the cleaning elements. To this end, the valves 12, 64, 41 and 72 are closed and the valves 31, 62, 67 are open.
  • the elements are both cleaned and separated from the water in the separator 30.
  • the waste is evacuated via line 65 and the cleaning elements return to the storage silo 40.
  • the installation can then be replenished with clean water and clean the installation by circulating the water in the separator and the piping 65.
  • the installation shown diagrammatically in FIG. 4, on the contrary allows the cleaning of a device without requiring the stopping of its operation. In addition, it only requires a low flow pump. It allows, by periodic tests on the coefficient, of heat exchange, to carry out cleaning phases of precise duration carried out correctly.
  • the synthetic cleaning elements introduced into the cleaning circuit constituted by the separator 30, the silo 40, the doser 45 and the pump 50 pass through the exchanger 10 and carry with them the deposits.
  • they are separated from the working fluid of the exchanger which joins the pipe 13 through a valve 35; a significant part of the waste is evacuated through the pipe 65.
  • the flow extracted by this pipe is compensated by an addition through the valve 74.
  • the synthetic cleaning elements return to the cleaning cycle until the end of the operation which is controlled by stopping the pump 50.
  • the latter is of lower capacity than in the case of the installation of FIG. 3 since it only carries a weak flow rate, of the order of 1/10 that of the exchanger pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Cleaning In General (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Detergent Compositions (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Inorganic Insulating Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

1. A cleaning component for an industrial apparatus in which a fluid flows which is capable of provoking calcium deposits and biological deposits, said cleaning component being brought into the fluid in great quantities and acting by mechanical action on the walls of the apparatus, characterized in that it is constituted by an artificial grain (1) made of a mixture of synthetic substances which are capable of withstanding a temperature of up to 150 degrees C, the grain having an average density of between 0,8 and 1,5 relative to the density of the fluid and an average diameter which lies between 40 and 6 000 mu m.

Description

La présente invention est relative au nettoyage de récipients ou dispositifs industriels dans lesquels circule un fluide susceptible de laisser des dépôts biologiques ou minéraux. En particulier, l'invention concerne le nettoyage des échangeurs, qu'ils soient tubulaires, à plaques ou en serpentin.The present invention relates to the cleaning of industrial containers or devices in which circulates a fluid capable of leaving biological or mineral deposits. In particular, the invention relates to the cleaning of exchangers, whether they are tubular, plate or serpentine.

On connaît des sytèmes de nettoyage mécaniques ou chimiques ; certains__systèmes mécaniques utilisent des brosses, lorsque le récipient à nettoyer permet leur introduction. Un tel système a l'inconvénient de nécessiter l'arrêt du dispositif à nettoyer et le démontage et le remontage de certaines pièces. L'immobilisation du dispositif, la main d'oeuvre nécessaire au nettoyage, rendent onéreuse l'application du système, qui par ailleurs, ne s'applique pas à tous les dispositifs à nettoyer.Mechanical or chemical cleaning systems are known; some mechanical systems use brushes, when the container to be cleaned allows their introduction. Such a system has the disadvantage of requiring the shutdown of the device to be cleaned and the disassembly and reassembly of certain parts. The immobilization of the device, the manpower necessary for cleaning, make the application of the system expensive, which moreover, does not apply to all the devices to be cleaned.

On a amélioré le système en utilisant, pour le nettoyage des condenseurs à tube, des boules, entraînées par le fluide et décrivant un circuit fermé à l'intérieur du dispositif à nettoyer. Ces boules, qui ont un diamètre voisin de celui des tubes à nettoyer, s'usent rapidement ; par ailleurs, le système est inutilisable pour le nettoyage de certains types d'échangeurs comme les échangeurs à plaques ou en serpentin.The system has been improved by using, for cleaning the tube condensers, balls, driven by the fluid and describing a closed circuit inside the device to be cleaned. These balls, which have a diameter close to that of the tubes to be cleaned, wear out quickly; moreover, the system cannot be used for cleaning certain types of exchangers such as plate or coil exchangers.

Les sytèmes chimiques de nettoyage par introduction dans le fluide d'agents de nettoyage (par exemple chlore) présentent des graves inconvénients en raison des difficultés posées par la pollution créée par le rejets de ces agents ou la corrosion des matériaux.Chemical cleaning systems by introducing cleaning agents (for example chlorine) into the fluid have serious drawbacks due to the difficulties posed by the pollution created by the discharge of these agents or the corrosion of materials.

On a également utilisé des sytèmes dans lesquels le fluide est chargé d'éléments abrasifs, tels que le sable ou la terre de diatomées. L'emploi de ces abrasifs nécessite l'arrêt du fonctionnement de l'échangeur à nettoyer et des dispositions particulières des échangeurs.Systems have also been used in which the fluid is charged with abrasive elements, such as sand or diatomaceous earth. The use of these abrasives requires stopping the operation of the exchanger to be cleaned and the special provisions of the exchangers.

Par ailleurs, ces abrasifs ont le défaut d'user le récipient à nettoyer et de s'accumuler dans certaines parties du récipient où la vitesse du fluide est plus faible, ce qui rend leur emploi impossible dans certains types d'échangeurs.Furthermore, these abrasives have the defect of wearing down the container to be cleaned and of accumulating in certain parts of the container where the speed of the fluid is lower, which makes their use impossible in certain types of exchangers.

Un but de l'invention est de réaliser un élément de nettoyage permettant d'être utilisé dans tous types de récipients industriels, sans risque d'accumulation ou de décantation dans une partie du récipient. Un autre but de l'invention est de réaliser un élément qui ne s'use pas trop vite lui-même et qui ne risque pas de détériorer par abrasion excessive l'intérieur du dispositif à nettoyer. Un autre but de l'invention est de définir une installation mettant en oeuvre l'élément de nettoyage précité, pour le nettoyage d'un dispositif industriel.An object of the invention is to provide a cleaning element allowing it to be used in all types of industrial containers, without the risk of accumulation or decantation in part of the container. pient. Another object of the invention is to produce an element which does not wear out too quickly itself and which does not risk damaging the interior of the device to be cleaned by excessive abrasion. Another object of the invention is to define an installation implementing the above-mentioned cleaning element, for cleaning an industrial device.

L'invention a pour objet un élément de nettoyage d'un dispositif industriel dans lequel circule un fluide susceptible de provoquer des dépôts minéraux et biologiques, ledit élément de nettoyage étant introduit en grand nombre dans le fluide et agissant par action mécanique sur les parois du dispositif, élément caractérisé en ce qu'il est constitué d'un grain artificiel d'un mélange de matériaux synthétiques susceptibles de supporter une température allant jusqu'à 150 degrés, le grain ayant une densité relative comprise entre 0,8 et 1,5 par rapport à la densité dudit fluide et un diamètre moyen compris entre 40 et 6000 microns.The subject of the invention is a cleaning element of an industrial device in which a fluid capable of causing mineral and biological deposits circulates, said cleaning element being introduced in large numbers into the fluid and acting by mechanical action on the walls of the device, element characterized in that it consists of an artificial grain of a mixture of synthetic materials capable of withstanding a temperature of up to 150 degrees, the grain having a relative density of between 0.8 and 1.5 relative to the density of said fluid and an average diameter between 40 and 6000 microns.

Le grain a dans tous les cas un diamètre moyen inférieur ou égal au tiers du diamètre hydraulique équivalent des parois à nettoyer, le diamètre équivalent étant égal à 4 fois le rapport de la section du passage du fluide au périmètre mouillé.The grain has in all cases an average diameter less than or equal to one third of the equivalent hydraulic diameter of the walls to be cleaned, the equivalent diameter being equal to 4 times the ratio of the section of the passage of the fluid to the wet perimeter.

Le grain est avantageusement constitué d'un mélange de polypropylène et de carbonate de calcium.The grain advantageously consists of a mixture of polypropylene and calcium carbonate.

Pour le nettoyage de dépôts durs, le grain est chargé de particules abrasives, régulièrement réparties au sein du grain et dont le matériau est de préférence choisi parmi le quartz et le corindon.For cleaning hard deposits, the grain is loaded with abrasive particles, regularly distributed within the grain and the material of which is preferably chosen from quartz and corundum.

L'invention est précisée sur les exemples de réalisation donnés ci-après en référence au dessin annexé dans lequel :

  • - la figure 1 est une vue en coupe d'un élément de nettoyage selon un premier mode de réalisation.
  • - la figure 2 est une vue en coupe d'un élément de nettoyage selon une variante.
  • - la figure 3 est une vue schématique d'une installation de nettoyage utilisant l'élément de nettoyage de l'invention, le fonctionnement du dispositif à nettoyer étant préalablement arrêté.
  • - la figure 4 est une vue schématique d'une installation de nettoyage utilisant l'élément de nettoyage conforme à l'invention et permettant de nettoyer l'installation sans arrêter son fonctionnement.
The invention is clarified on the embodiments given below with reference to the appended drawing in which:
  • - Figure 1 is a sectional view of a cleaning element according to a first embodiment.
  • - Figure 2 is a sectional view of a cleaning element according to a variant.
  • - Figure 3 is a schematic view of a cleaning installation using the cleaning element of the invention, the operation of the device to be cleaned being previously stopped.
  • - Figure 4 is a schematic view of a cleaning installation using the cleaning element according to the invention and for clean the installation without stopping its operation.

La figure 1 représente, vu en coupe transversale, un élément de nettoyage 1 conforme à l'invention, qui s'applique aux encrassements mous.Figure 1 shows, seen in cross section, a cleaning element 1 according to the invention, which applies to soft fouling.

Il est présenté sous forme sensiblement sphérique, et son diamètre est compris entre 40 et 6000 microns. Il peut aussi être de forme quelconque pour les encrassements mous.It is presented in a substantially spherical form, and its diameter is between 40 and 6000 microns. It can also be of any shape for soft soiling.

En tous cas, le grain aura un diamètre moyen inférieur ou égal au tiers du diamètre hydraulique équivalent des parois à nettoyer. Ce diamètre est égal à 4 - où S est la section de passage du fluide et p le périmètre de la surface mouillée.In all cases, the grain will have an average diameter less than or equal to one third of the equivalent hydraulic diameter of the walls to be cleaned. This diameter is equal to 4 - where S is the cross section of the fluid and p the perimeter of the wet surface.

Dans le cas d'un tube de rayon r, le diamètre équivalent d est égal à 2r.In the case of a tube of radius r, the equivalent diameter d is equal to 2r.

Dans le cas de plaques de longueur L et d'écartement e, le diamètre équivalent est égal à 2e, si L est grand devant e.In the case of plates of length L and spacing e, the equivalent diameter is equal to 2e, if L is large in front of e.

L'élément est réalisé par un mélange de matière plastique et de divers composants ; les proportions des divers composants sont choisies de manière que la densité moyenne relative par rapport à celle du fluide soit comprise entre 0,8 et 1,5. Cet intervalle de densité présente un double avantage : l'élément est de densité suffisamment faible pour ne pas s'accumuler dans les parties du dispositif où la vitesse d'écoulement du fluide est plus faible ; d'autre part, sa densité peut être choisie suffisamment différente de celle du fluide de travail du dispositif (généralement de l'eau lorsque le dispositif est un échangeur de chaleur), pour pouvoir être séparé du fluide au moyen de séparateur compris dans une installation de nettoyage, comme il sera décrit plus loin.The element is made of a mixture of plastic and various components; the proportions of the various components are chosen so that the relative density relative to that of the fluid is between 0.8 and 1.5. This density interval has a double advantage: the element is of sufficiently low density not to accumulate in the parts of the device where the fluid flow speed is lower; on the other hand, its density can be chosen sufficiently different from that of the working fluid of the device (generally water when the device is a heat exchanger), in order to be able to be separated from the fluid by means of a separator included in an installation cleaning, as will be described later.

On choisit en outre des matériaux susceptibles de résister à une température atteignant 150°C, et ayant une dureté supérieure à celle des dépôts mous à ôter, mais inférieure à celle du métal constituant le dispositif à nettoyer.We also choose materials capable of withstanding a temperature of up to 150 ° C, and having a hardness greater than that of the soft deposits to be removed, but less than that of the metal constituting the device to be cleaned.

A titre d'exemple, l'élément est réalisé à partir de polypropylène de densité voisine de 0,8, mélangé à du carbonate de calcium, de densité 2,7 dans des proportions choisies, pour assurer à l'élément terminé une densité relative comprise dans l'intervalle indiqué plus haut.For example, the element is made from polypropylene with a density close to 0.8, mixed with calcium carbonate, density 2.7 in selected proportions, to ensure the finished element a relative density included in the range indicated above.

Les éléments sont obtenus par un procédé de compoundage à chaud.The elements are obtained by a hot compounding process.

Lorsqu'on a des dépôts durs à ôter (précipités de sels minéraux par exemple), on utilise de préférence des éléments de nettoyage du type de celui de la figure 2, sensiblement sphérique et qui différe de celui de la figure 1 en ce qu'il comporte, noyées en son intérieur, des particules abrasives 2, telles que de la poudre de corindon, de silice, ou de quartz .When hard deposits are to be removed (precipitated from mineral salts for example), cleaning elements of the type of that of FIG. 2 are preferably used, substantially spherical and which differs from that of FIG. 1 in that it contains, embedded in its interior, abrasive particles 2, such as corundum, silica, or quartz powder.

Les éléments de nettoyage peuvent être utilisés classiquement pour nettoyer une installation dont le fonctionnement est préalablement arrêté.The cleaning elements can be conventionally used to clean an installation whose operation is previously stopped.

Une telle installation est représentée schématiquement dans la figure 3.Such an installation is shown diagrammatically in FIG. 3.

On distingue un dispositif à nettoyer 10, qui est par exemple un échange de chaleur, recevant un fluide (de l'eau) froid par une canalisation d'entrée 11 grâce à une pompe 12, ce fluide sortant du dispositif par une canalisation de sortie 13.There is a device to be cleaned 10, which is for example a heat exchange, receiving a cold fluid (water) by an inlet pipe 11 by a pump 12, this fluid leaving the device by an outlet pipe 13.

Des vannes 14 et 15 permettent d'isoler le dispositif afin de le nettoyer. L'installation de nettoyage comprend en parallèle sur le dispositif 10 de la sortie vers l'entrée de celui-ci un circuit composé successivement d'un séparateur liquide-solide 30, d'un silo de stockage 40, d'un appareil de dosage 45 et d'une pompe de nettoyage 50. Une canalisation 60 relie en outre la sortie du dispositif 10 et l'entrée de la pompe 50 et permet de circuler en dérivation lorsque le fluide à la concentration d'éléments voulue.Valves 14 and 15 allow the device to be isolated in order to clean it. The cleaning installation comprises in parallel on the device 10 from the outlet to the inlet thereof a circuit composed successively of a liquid-solid separator 30, a storage silo 40, a metering device 45 and a cleaning pump 50. A pipe 60 furthermore connects the outlet of the device 10 and the inlet of the pump 50 and makes it possible to circulate in bypass when the fluid at the desired concentration of elements.

Tous les organes ci-dessus sont encadrés de vannes d'arrêt. Une canalisation 61 relie par l'intermédiaire d'une vanne 62 la partie supérieure du séparateur à la canalisation 60. Elle permet de recycler le liquide jusqu'à la séparation totale des éléments du fluide.All the above components are surrounded by shut-off valves. A pipe 61 connects via a valve 62 the upper part of the separator to the pipe 60. It recycles the liquid until the complete separation of the elements of the fluid.

De même une canalisation 63 relie par l'intermédiaire d'une vanne 64, le haut du silo de stockage 40 à la canalisation 60 ; elle permet la mise en concentration du fluide. Une canalisation 65, isolée par une vanne 66, permet le rejet des suspensions biologiques issues du nettoyage.Likewise, a pipe 63 connects, via a valve 64, the top of the storage silo 40 to the pipe 60; it allows the concentration of the fluid. A pipe 65, isolated by a valve 66, allows the rejection of biological suspensions from cleaning.

Une canalisation 70, partant du sommet du silo de stockage 40 permet la fluidisation des éléments. Cette canalisation est reliée à la base du silo par une canalisation 71 par l'intermédiaire d'une vanne 72 et d'une pompe 73.A pipe 70, starting from the top of the storage silo 40 allows the elements to fluidize. This pipe is connected to the base from the silo via a pipe 71 via a valve 72 and a pump 73.

Des vannes 41, 51, 67 et 81 complètent le dispositif.Valves 41, 51, 67 and 81 complete the device.

Le fonctionnement de l'installation est le suivant :

  • - en l'absence de nettoyage les vannes 51 et 81 sont fermées, les vannes,l4 et 15 sont ouvertes et l'eau circule dans l'échangeur sous l'action de la pompe 12.
  • - pour nettoyer, on arrête la pompe 12, on isole l'échangeur par fermeture des vannes 14 et 15, et on ouvre les vannes 51 et 81.
The operation of the installation is as follows:
  • - in the absence of cleaning, the valves 51 and 81 are closed, the valves, 14 and 15 are open and the water circulates in the exchanger under the action of the pump 12.
  • - to clean, the pump 12 is stopped, the exchanger is isolated by closing the valves 14 and 15, and the valves 51 and 81 are opened.

Le jeu de vannes et de tuyauteries permet la réalisation des trois phases suivantes :

  • 1. l'injection d'éléments dans le liquide à une concentration donnée ;
  • 2. la circulation du fluide chargé d'éléments nettoyants dans le dispositif à nettoyer en dérivation avec le séparateur et le silo. de stockage ;
  • 3. la récupération des éléments nettoyants avant la remise en service du dispositif nettoyé.
The set of valves and pipes allows the realization of the following three phases:
  • 1. the injection of elements into the liquid at a given concentration;
  • 2. the circulation of the fluid loaded with cleaning elements in the device to be cleaned bypass with the separator and the silo. storage;
  • 3. recovering the cleaning elements before putting the cleaned device back into service.

Dans la première phase, on isole le séparateur par fermeture des vannes 31 et 62. Les vannes 12, 64, 41 et 72 sont ouvertes ; la vanne 67 est fermée. Le dosage en concentration d'éléments de nettoyage s'effectue par la fluidisation d'une partie des éléments contenus dans le silo de stockage 40. La fluidisation est obtenue par l'injection d'un faible débit d'eau avec la pompe 73. La mesure de la concentration est déterminée par le doseur 45.In the first phase, the separator is isolated by closing the valves 31 and 62. The valves 12, 64, 41 and 72 are open; valve 67 is closed. The dosing in concentration of cleaning elements is carried out by the fluidization of a part of the elements contained in the storage silo 40. The fluidization is obtained by injecting a low flow of water with the pump 73. The concentration measurement is determined by the metering device 45.

Dans la deuxième phase, les vannes 31, 62, 64 et 41 sont fermées ; les vannes 12 et 67 sont ouvertes.In the second phase, the valves 31, 62, 64 and 41 are closed; the valves 12 and 67 are open.

Le nettoyage se fait par circulation du fluide chargé d'élément de nettoyage hors le séparateur 30 et le silo de stockage 40. La concentration en éléments est avantageusement de 5 à 15%. La vitesse d'écoulement peut être comprise entre 0,2 et 1,5 m/s pour les TUBULURES de diamètre inférieur à 8 mm, et entre 0,8 et 4 m/s pour les tubulures de diamètre supérieur à 8 mm.The cleaning is done by circulation of the fluid loaded with cleaning element outside the separator 30 and the storage silo 40. The concentration of elements is advantageously from 5 to 15%. The flow speed can be between 0.2 and 1.5 m / s for tubing with a diameter less than 8 mm, and between 0.8 and 4 m / s for tubing with a diameter greater than 8 mm.

Un temps de nettoyage de 15 minutes est suffisant en général s'il est répété périodiquement (par exemple, tous les mois).A cleaning time of 15 minutes is usually sufficient if it is repeated periodically (for example, monthly).

La troisième phase consiste à récupérer les éléments de nettoyage. A cet effet, les vannes 12, 64, 41 et 72 sont fermées et les vannes 31, 62, 67 sont ouvertes.The third phase consists in recovering the cleaning elements. To this end, the valves 12, 64, 41 and 72 are closed and the valves 31, 62, 67 are open.

Les éléments sont tout à la fois nettoyés et séparés de l'eau dans le séparateur 30. Les déchets sont évacués par la canalisation 65 et les éléments de nettoyage retournent au silo de stockage 40. On peut ensuite réalimenter l'installation en eau propre et nettoyer l'installation en faisant circuler l'eau dans le séparateur et la tuyauterie 65.The elements are both cleaned and separated from the water in the separator 30. The waste is evacuated via line 65 and the cleaning elements return to the storage silo 40. The installation can then be replenished with clean water and clean the installation by circulating the water in the separator and the piping 65.

Une installation du type qui vient d'être décrit a l'inconvénient d'obliger l'arrêt du fonctionnement du dispositif à nettoyer. Elle nécessite l'emploi d'une forte pompe de nettoyage 50 capable de faire circuler tout le débit de l'échangeur. Elle ne permet pas d'évaluer avec précision l'état d'avancement du nettoyage.An installation of the type which has just been described has the drawback of forcing the operation of the device to be cleaned to stop. It requires the use of a strong cleaning pump 50 capable of circulating the entire flow of the exchanger. It does not allow an accurate assessment of the progress of cleaning.

L'installation représentée schématiquement dans la figure 4, permet au contraire le nettoyage d'un dispositif sans nécessiter l'arrêt de son fonctionnement. En outre, elle ne nécessite qu'une pompe de faible débit. Elle permet, par des tests périodiques sur le coefficient ,d'échange de chaleur, de procéder à des phases de nettoyage de durée précise effectuées correctement.The installation shown diagrammatically in FIG. 4, on the contrary allows the cleaning of a device without requiring the stopping of its operation. In addition, it only requires a low flow pump. It allows, by periodic tests on the coefficient, of heat exchange, to carry out cleaning phases of precise duration carried out correctly.

Les éléments communs aux figures 3 et 4 ont reçu le même numéro de référence. Au cours du nettoyage, la vanne 15 étant fermée, le séparateur 30 est traversé cette fois par le débit total Q de l'échangeur augmenté du débit q de l'installation de nettoyage.The elements common to Figures 3 and 4 have been given the same reference number. During cleaning, the valve 15 being closed, the separator 30 is crossed this time by the total flow Q of the exchanger increased by the flow q of the cleaning installation.

Les éléments de nettoyage synthétiques, introduits dans le circuit de nettoyage constitué par le séparateur 30, le silo 40, le doseur 45 et la pompe 50 traversent l'échangeur 10 et entrainent avec eux les dépôts. Dans le séparateur 30, ils sont séparés du fluide de travail de l'échangeur qui rejoint la canalisation 13 à travers une vanne 35 ; une part importante des déchets est évacuée par la canalisation 65. Le débit extrait par cette canalisation est compensé par un appoint à travers la vanne 74. Les éléments de nettoyage synthétique retournent dans le cycle de nettoyage jusqu'à la fin de l'opération qui est commandée par l'arrêt de la pompe 50.The synthetic cleaning elements, introduced into the cleaning circuit constituted by the separator 30, the silo 40, the doser 45 and the pump 50 pass through the exchanger 10 and carry with them the deposits. In the separator 30, they are separated from the working fluid of the exchanger which joins the pipe 13 through a valve 35; a significant part of the waste is evacuated through the pipe 65. The flow extracted by this pipe is compensated by an addition through the valve 74. The synthetic cleaning elements return to the cleaning cycle until the end of the operation which is controlled by stopping the pump 50.

Cette dernière est de capacité plus faible que dans le cas de l'installation de la figure 3 puisqu'elle ne véhicule qu'un faible débit, de l'ordre du 1/10 de celui de la pompe de l'échangeur.The latter is of lower capacity than in the case of the installation of FIG. 3 since it only carries a weak flow rate, of the order of 1/10 that of the exchanger pump.

La même installation peut servir au nettoyage successif de plusieurs dispositifs. Il suffit de prévoir des jeux de tuyauteries et de vannes appropriés.The same installation can be used for successive cleaning of several devices. It suffices to provide appropriate sets of pipes and valves.

Claims (6)

1/ Elément de nettoyage d'un dispositif industriel dans lequel circule un fluide susceptible de provoquer des dépôts calcaires et biologiques, ledit élément de nettoyage étant introduit en grand nombre dans le fluide et agissant par action mécanique sur les parois du dispositif, élément caractérisé en ce qu'il est constitué d'un grain artificiel (1) d'un mélange de matériaux synthétiques susceptibles de supporter une température allant jusqu'à 150 degrés, le grain ayant une densité moyenne relative comprise entre 0,8 et 1,5 par rapport à la densité du fluide et un diamètre moyen compris entre 40 et 6000 microns.1 / cleaning element of an industrial device in which a fluid capable of causing calcareous and biological deposits circulates, said cleaning element being introduced in large numbers into the fluid and acting by mechanical action on the walls of the device, element characterized in that it consists of an artificial grain (1) of a mixture of synthetic materials capable of withstanding a temperature of up to 150 degrees, the grain having a relative average density of between 0.8 and 1.5 per relative to the density of the fluid and an average diameter between 40 and 6000 microns. 2/ Elément de nettoyage selon la revendication 1, caractérisé en ce que le grain (1) a un diamètre moyen inférieur ou égal au 1/3 du diamètre hydraulique équivalent des parois à nettoyer, ce diamètre hydraulique équivalent étant égal à 4 fois le rapport de la section de passage du fluide au périmètre mouillé.2 / cleaning element according to claim 1, characterized in that the grain (1) has an average diameter less than or equal to 1/3 of the equivalent hydraulic diameter of the walls to be cleaned, this equivalent hydraulic diameter being equal to 4 times the ratio from the fluid passage section to the wet perimeter. 3/ Elément de nettoyage selon l'une des revendications 1 et 2, caractérisé en ce que.le grain est constitué d'un mélange de polypropylène et de carbonate de calcium.3 / cleaning element according to one of claims 1 and 2, characterized in que.le grain consists of a mixture of polypropylene and calcium carbonate. 4/ Elément de nettoyage selon l'une des revendications 1 à 3, caractérisé en ce que pour le nettoyage de dépôts durs, le grain est chargé de particules (2) en matériau abrasif, lesdites particules étant régulièrement réparties au sein du grain.4 / cleaning element according to one of claims 1 to 3, characterized in that for cleaning hard deposits, the grain is loaded with particles (2) of abrasive material, said particles being regularly distributed within the grain. 5/ Elément de nettoyage selon l'une des revendications 1 0 4, caractérisé en ce que le matériau abrasif est choisi parmi la silice, le quartz et le corindon.5 / cleaning element according to one of claims 1 0 4, characterized in that the abrasive material is chosen from silica, quartz and corundum. 6/ Installation pour le nettoyage d'un dispositif industriel dans lequel circule un fluide lorsque le dispositif fonctionne, ledit fluide arrivant au dispositif par une canalisation d'entrée et en repartant par une canalisation de sortie, ladite installation utilisant pour le nettoyage les éléments selon l'une quelconque des revendications 1 à 3, ladite installation comprenant des moyens d'arrêt de la circulation du fluide pendant la phase de nettoyage, caractérisée en ce qu'elle comprend en parallèle sur le dispositif (10) un circuit comprenant, dispensés successivement de la sortie du dispositif vers son entrée, un séparateur liquide-solide (30), un silo de stockage (40), un appareil de dosage (45) et une pompe de nettoyage (50), une canalisation (60) étant disposée entre l'entrée dudit séparateur liquide-solide (30) et l'entrée de la pompe de nettoyage (50), cette canalisation étant reliée par des canalisations (61, 63) respectivement au sommet et à la sortie du séparateur liquide-solide (30).6 / Installation for cleaning an industrial device in which a fluid circulates when the device is operating, said fluid arriving at the device by an inlet pipe and leaving by an outlet pipe, said installation using the elements according to any one of claims 1 to 3, said installation comprising means for stopping the circulation of the fluid during the cleaning phase, characterized in that it comprises in parallel on the device (10) a circuit comprising, dispensed successively from the device outlet to its inlet, a liquid-solid separator (30), a storage silo (40), a metering (45) and a cleaning pump (50), a pipe (60) being disposed between the inlet of said liquid-solid separator (30) and the inlet of the cleaning pump (50), this pipe being connected by pipes (61, 63) respectively at the top and at the outlet of the liquid-solid separator (30).
EP81109896A 1980-12-01 1981-11-26 Cleaning element and cleaning installation for application of the element Expired EP0053355B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81109896T ATE5746T1 (en) 1980-12-01 1981-11-26 PURIFICATION BODY AND PURIFICATION EQUIPMENT FOR THE APPLICATION OF THIS BODY.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8025448A FR2495028A1 (en) 1980-12-01 1980-12-01 CLEANING ELEMENT AND CLEANING INSTALLATION USING THE SAME
FR8025448 1980-12-01

Publications (2)

Publication Number Publication Date
EP0053355A1 true EP0053355A1 (en) 1982-06-09
EP0053355B1 EP0053355B1 (en) 1983-12-28

Family

ID=9248514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109896A Expired EP0053355B1 (en) 1980-12-01 1981-11-26 Cleaning element and cleaning installation for application of the element

Country Status (8)

Country Link
EP (1) EP0053355B1 (en)
JP (1) JPS57122299A (en)
AT (1) ATE5746T1 (en)
CA (1) CA1193108A (en)
DE (1) DE3161804D1 (en)
ES (1) ES8300518A1 (en)
FR (1) FR2495028A1 (en)
PT (1) PT74054B (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589090A1 (en) * 1983-11-23 1987-04-30 Superior I D Tube Cleaners Inc DEVICE FOR CLEANING THE INTERNAL WALL OF TUBES, TUBE CLEANERS AND METHOD OF IMPLEMENTING THE SAME
GB2207972A (en) * 1987-08-01 1989-02-15 Shizuo Sagawa Cleaning pigs
EP0487488A2 (en) * 1990-10-19 1992-05-27 INDUSTRIEANLAGEN-PLANUNGS- UND HANDELSGESELLSCHAFT m.b.H. Method, cleaning agent, cleaning bodies and use of a cleaning agent for the cleaning of workpieces
DE4244396A1 (en) * 1992-12-29 1994-06-30 Heron Sondermaschinen Und Steu Connector for detachably joining two profiled light metal rods
EP0634229A1 (en) * 1993-07-12 1995-01-18 Promotec AG Method, assembly and apparatus for internal cleaning and coating of pipelines
US5685041A (en) * 1996-02-14 1997-11-11 Sivacoe; Orlande Pipe pig with abrasive exterior
WO2000008404A1 (en) * 1998-08-06 2000-02-17 E. Beaudrey & Cie Method and installation for managing solid elements circulating in a heat exchanger for cleaning the latter
WO2003008116A1 (en) * 2001-07-19 2003-01-30 Bayer Materialscience Ag Method for removing deposits from chemical reactors
WO2004042314A1 (en) * 2002-11-05 2004-05-21 Taprogge Gmbh System for cleaning heat-exchanger tubes
US6945316B2 (en) 2002-11-05 2005-09-20 Taprogge Gmbh System for cleaning tubes of heat exchangers and cleaning bodies therefor
WO2006032899A1 (en) * 2004-09-25 2006-03-30 Shaun William Sadler Method and apparatus for cleaning liquids
WO2009108435A1 (en) * 2008-02-27 2009-09-03 Westlake Longview Corporation Method of preventing or reducing agglomeration on grid in fluidized-bed vessel
US8129482B2 (en) 2008-02-27 2012-03-06 Westlake Longview Corporation Method of preventing or reducing polymer agglomeration on grid in fluidized-bed reactors
EP2689838A1 (en) * 2012-07-26 2014-01-29 Saudi Basic Industries Corporation Method for cleaning a reactor
US20160238333A1 (en) * 2013-10-14 2016-08-18 Hvs Engineering Pte Ltd Method of cleaning a heat exchanger

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0212493U (en) * 1988-07-06 1990-01-25
JP6767066B1 (en) * 2020-02-07 2020-10-14 株式会社ミズキ Cleaning balls and their manufacturing methods

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1214853A (en) * 1958-05-02 1960-04-12 Berguerand & Cie Ets Parts of rubber, plastic or any flexible material, specially designed for cleaning pipes
FR74154E (en) * 1961-03-06
US3011197A (en) * 1957-07-18 1961-12-05 Mobay Chemical Corp Pipeline cleaning devices
FR1449837A (en) * 1965-07-06 1966-05-06 Duct cleaning pad
DE1247359B (en) * 1962-01-22 1967-08-17 Hitachi Ltd Cleaning device for tube heat exchangers
DE1281456B (en) * 1962-05-02 1968-10-31 Taprogge Fa Ludwig Sieve arrangement for capacitor systems with self-cleaning device
US3573985A (en) * 1967-08-15 1971-04-06 Western Decalta Petroleum Ltd Method for cleaning pipelines
EP0041700A2 (en) * 1980-06-10 1981-12-16 Taprogge Gesellschaft mbH Cleaning bodies for the internal cleaning of tube heat exchangers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS534567B2 (en) * 1973-05-28 1978-02-18

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR74154E (en) * 1961-03-06
US3011197A (en) * 1957-07-18 1961-12-05 Mobay Chemical Corp Pipeline cleaning devices
FR1214853A (en) * 1958-05-02 1960-04-12 Berguerand & Cie Ets Parts of rubber, plastic or any flexible material, specially designed for cleaning pipes
DE1247359B (en) * 1962-01-22 1967-08-17 Hitachi Ltd Cleaning device for tube heat exchangers
DE1281456B (en) * 1962-05-02 1968-10-31 Taprogge Fa Ludwig Sieve arrangement for capacitor systems with self-cleaning device
FR1449837A (en) * 1965-07-06 1966-05-06 Duct cleaning pad
US3573985A (en) * 1967-08-15 1971-04-06 Western Decalta Petroleum Ltd Method for cleaning pipelines
GB1230129A (en) * 1967-08-15 1971-04-28
EP0041700A2 (en) * 1980-06-10 1981-12-16 Taprogge Gesellschaft mbH Cleaning bodies for the internal cleaning of tube heat exchangers

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589090A1 (en) * 1983-11-23 1987-04-30 Superior I D Tube Cleaners Inc DEVICE FOR CLEANING THE INTERNAL WALL OF TUBES, TUBE CLEANERS AND METHOD OF IMPLEMENTING THE SAME
EP0220347A1 (en) * 1983-11-23 1987-05-06 Superior I.D. Tube Cleaners Inc. tube cleaners for cleaning the inside of a tube
GB2207972A (en) * 1987-08-01 1989-02-15 Shizuo Sagawa Cleaning pigs
GB2207972B (en) * 1987-08-01 1991-10-16 Shizuo Sagawa Pipe cleaning method
EP0487488A2 (en) * 1990-10-19 1992-05-27 INDUSTRIEANLAGEN-PLANUNGS- UND HANDELSGESELLSCHAFT m.b.H. Method, cleaning agent, cleaning bodies and use of a cleaning agent for the cleaning of workpieces
EP0487488A3 (en) * 1990-10-19 1993-01-27 Industrieanlagen-Planungs- Und Handelsgesellschaft M.B.H. Method, cleaning agent, cleaning bodies and use of a cleaning agent for the cleaning of workpieces
DE4244396A1 (en) * 1992-12-29 1994-06-30 Heron Sondermaschinen Und Steu Connector for detachably joining two profiled light metal rods
DE4244396C2 (en) * 1992-12-29 1998-04-30 Heron Sondermaschinen Und Steu Connector for the detachable connection of two profile bars, preferably made of light metal
EP0634229A1 (en) * 1993-07-12 1995-01-18 Promotec AG Method, assembly and apparatus for internal cleaning and coating of pipelines
US5685041A (en) * 1996-02-14 1997-11-11 Sivacoe; Orlande Pipe pig with abrasive exterior
WO2000008404A1 (en) * 1998-08-06 2000-02-17 E. Beaudrey & Cie Method and installation for managing solid elements circulating in a heat exchanger for cleaning the latter
DE19883011B4 (en) * 1998-08-06 2008-11-27 E. Beaudrey & Cie. Method and device for controlling or monitoring solid elements circulating in a heat exchanger for cleaning the same
WO2003008116A1 (en) * 2001-07-19 2003-01-30 Bayer Materialscience Ag Method for removing deposits from chemical reactors
US6986816B2 (en) 2001-07-19 2006-01-17 Bayer Aktiengesellschaft Method for removing deposits from chemical reactors
WO2004042314A1 (en) * 2002-11-05 2004-05-21 Taprogge Gmbh System for cleaning heat-exchanger tubes
US6945316B2 (en) 2002-11-05 2005-09-20 Taprogge Gmbh System for cleaning tubes of heat exchangers and cleaning bodies therefor
WO2006032899A1 (en) * 2004-09-25 2006-03-30 Shaun William Sadler Method and apparatus for cleaning liquids
WO2009108435A1 (en) * 2008-02-27 2009-09-03 Westlake Longview Corporation Method of preventing or reducing agglomeration on grid in fluidized-bed vessel
US8124697B2 (en) 2008-02-27 2012-02-28 Westlake Longview Corporation Method of preventing or reducing agglomeration on grid in fluidized-bed vessel
US8129482B2 (en) 2008-02-27 2012-03-06 Westlake Longview Corporation Method of preventing or reducing polymer agglomeration on grid in fluidized-bed reactors
EP2689838A1 (en) * 2012-07-26 2014-01-29 Saudi Basic Industries Corporation Method for cleaning a reactor
US20160238333A1 (en) * 2013-10-14 2016-08-18 Hvs Engineering Pte Ltd Method of cleaning a heat exchanger
US10030920B2 (en) * 2013-10-14 2018-07-24 Hvs Engineering Pte Ltd Method of cleaning a heat exchanger
AU2014337436B2 (en) * 2013-10-14 2018-10-04 Hvs Engineering Pte Ltd Method of cleaning a heat exchanger

Also Published As

Publication number Publication date
ES507574A0 (en) 1982-11-01
JPS57122299A (en) 1982-07-30
DE3161804D1 (en) 1984-02-02
CA1193108A (en) 1985-09-10
EP0053355B1 (en) 1983-12-28
FR2495028B1 (en) 1984-08-24
PT74054B (en) 1983-11-22
ES8300518A1 (en) 1982-11-01
FR2495028A1 (en) 1982-06-04
ATE5746T1 (en) 1984-01-15
PT74054A (en) 1981-12-01

Similar Documents

Publication Publication Date Title
EP0053355B1 (en) Cleaning element and cleaning installation for application of the element
EP2897913B1 (en) Water treatment process comprising floatation combined with gravity filtration, and corresponding equipment
FR2501054A1 (en) METHOD AND APPARATUS FOR CLEANING POOLS
FR2638659A1 (en) FILTRATION APPARATUS COMPRISING AN ULTRASONIC DECOLMATION DEVICE AND CORRESPONDING DECOLMATION METHOD
JP7255830B2 (en) Pipe cleaning method and pipe cleaning system
EP1874695A2 (en) Method for purifying effluent in an anaerobic reactor
CA2652255A1 (en) System for cleaning an oil tank and method of cleaning an oil tank
EP0369851B1 (en) Cleaning device for a tube wherein a fluid is circulating
FR2990628A1 (en) DEVICE FOR FILTRATION OF DOMESTIC GRAY WATER.
EP1289890B1 (en) Device for measuring doses of a reagent by dissolution in a liquid flow
FR3068030A1 (en) FERROUS PARTICLE CAPTURING DEVICE COMPRISING AN ENCLOSURE IN WHICH AT LEAST ONE REMOVABLE MAGNET BAR IS PRESENT
FR2764821A1 (en) Dispenser for reagent in tablet form which is added to liquid
FR2774110A1 (en) Syphon device discharges a flush of a known volume of liquid in an effluent treatment plant
EP4414521A1 (en) Filtration system for recirculating wash water
EP3238803B1 (en) Separator-decanter device for the treatment of rainwater and / or runoff
FR2872153A1 (en) System for injecting a fluid under pressure into a tank of effluent uses nozzles passing through bottom of tank at an angle and having vertical outlet ends
EP2474674B1 (en) Siphon device with automatic priming
EP2977164B1 (en) Method for modifying a concrete structure
FR2741472A1 (en) Moulding a radiation-absorbing metal shield in situ
EP1349643A1 (en) Backwashing of a hollow fibre filter operating in frontal mode
FR3106348A3 (en) Installation for treating tubes with a treatment fluid
BE895982A (en) MICRO-IRRIGATION, SELF-FILTERING, SELF-REGULATING AND SELF-CLEANING DISPENSER
EP1944356A1 (en) Method and installation for heating a brewery product
BE570752A (en)
FR2566815A2 (en) Precast reinforced concrete catching or collecting chamber

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19821111

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 5746

Country of ref document: AT

Date of ref document: 19840115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3161804

Country of ref document: DE

Date of ref document: 19840202

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19840322

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19840813

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19840823

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19840930

Year of fee payment: 4

Ref country code: BE

Payment date: 19840930

Year of fee payment: 4

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19841130

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19861117

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19861130

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19871126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19871127

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19871130

Ref country code: CH

Effective date: 19871130

Ref country code: BE

Effective date: 19871130

BERE Be: lapsed

Owner name: ALSTHOM-ATLANTIQUE

Effective date: 19871130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19880601

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19880729

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19880802

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881118

EUG Se: european patent has lapsed

Ref document number: 81109896.1

Effective date: 19880913