FR2479964A1 - SELF-CLEANING SYSTEM ON TUBE COIL EXCHANGERS - Google Patents
SELF-CLEANING SYSTEM ON TUBE COIL EXCHANGERS Download PDFInfo
- Publication number
- FR2479964A1 FR2479964A1 FR8007856A FR8007856A FR2479964A1 FR 2479964 A1 FR2479964 A1 FR 2479964A1 FR 8007856 A FR8007856 A FR 8007856A FR 8007856 A FR8007856 A FR 8007856A FR 2479964 A1 FR2479964 A1 FR 2479964A1
- Authority
- FR
- France
- Prior art keywords
- tubes
- spiral
- exchangers
- diameter
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/086—Heat exchange elements made from metals or metal alloys from titanium or titanium alloys
-
- 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
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/0436—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided with mechanical cleaning tools, e.g. scrapers, with or without additional fluid jets
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
- E03C1/30—Devices to facilitate removing of obstructions in waste-pipes or sinks
- E03C1/304—Devices to facilitate removing of obstructions in waste-pipes or sinks using fluid under pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
- F28F13/125—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation by stirring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
-
- 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
- F28G1/06—Non-rotary, e.g. reciprocated, appliances having coiled wire tools, i.e. basket type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0059—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for petrochemical plants
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Cleaning In General (AREA)
Abstract
DISPOSITIF D'AUTO-NETTOYAGE PERMANENT EN MARCHE DE BUTES D'ECHANGEURS CARACTERISE EN CE QU'IL CONSISTE EN UNE SPIRALE METALLIQUE 2 RESISTANT A LA CORROSION ET A L'USURE PAR FROTTEMENT, INTRODUITE A L'INTERIEUR DES TUBES 10, D'UNE LONGUEUR LEGEREMENT INFERIEURE A CELLE DES TUBES, MISE EN CONTACT REPETITIF AVEC LES PAROIS INTERIEURES DES TUBES, SOUS L'EFFET DU FLUIDE CIRCULANT DANS LES TUBES, L'ENTRAINEMENT DE LA SPIRALE ETANT EVITE PAR UN SYSTEME D'ACCROCHAGE 4 DISPOSE EN AMONT. APPLICATION DU DISPOSITIF AUX ECHANGEURS DE RAFFINERIE, OU TOUS AUTRES ECHANGEURS INDUSTRIELS S'ENCRASSANT A L'INTERIEUR DES TUBES.PERMANENT SELF-CLEANING DEVICE IN OPERATION OF EXCHANGER STOPS CHARACTERIZED IN THAT IT CONSISTS OF A METAL SPIRAL 2 RESISTANT TO CORROSION AND TO FRICTION WEAR, INSERTED INSIDE THE TUBES 10, WITH A LENGTH SLIGHTLY LESS THAN THAT OF THE TUBES, REPEATED CONTACT WITH THE INTERIOR WALLS OF THE TUBES, UNDER THE EFFECT OF THE FLUID CIRCULATING THROUGH THE TUBES, THE DRIVE OF THE SPIRAL IS AVOIDED BY A HITCHING SYSTEM 4 PROVIDED UPSTREAM. APPLICATION OF THE DEVICE TO REFINERY EXCHANGERS, OR ALL OTHER INDUSTRIAL EXCHANGERS BECOMING CLOGGED INSIDE THE TUBES.
Description
L'encrassement d'un échangeur, notamment en raffi-Fouling of an exchanger, especially in refining
nerie, présente divers inconvénients On constate: has various disadvantages.
- une baisse progressive des performances d'échange thermi- - a gradual decline in thermal exchange performance
que, d'o une plus grande consommation d'énergie, - une augmentation progressive des pertes de charge, et par- fois une limitation de débit, l'obligation d'arrêter une installation pour nettoyer l'un de ses échangeurs s'il n'est pas muni d'un bipass, ce qui that, hence greater energy consumption, - a gradual increase in pressure drops, and sometimes a limitation of flow, the obligation to stop an installation to clean one of its exchangers if does not have a bipass, which
entraîne un manque à gagner sur la production, et des dé- leads to a shortfall in production, and
penses diverses inhérentes à toutes les opérations d'arrêt miscellaneous considerations inherent in all stop operations
et de remise en marche, telles que des dépenses de combus- and restart, such as fuel
tible, de torchage, etc...tible, flaring, etc ...
L'investissement dans l'aménagement d'un bipass entraine d'autres dépenses, celles de l'installation des vannes d'isolement du bipass et de sa vanne, ainsi que celles The investment in the construction of a bipass leads to other expenses, those of the installation of the isolation valves of the bipass and its valve, as well as those
relatives à la perte de chaleur pendant la période du net- relating to heat loss during the net-
toyage de l'échangeur bipassé.cleaning of the bypassed heat exchanger.
Dans tous les cas, le nettoyage du faisceau de tu- In any case, the cleaning of the beam of tu-
bes est onéreux et révèle que les tubes encrassés sont par- it is expensive and reveals that dirty pipes are
fois l'objet de corrosion sous dépôt. once the object of corrosion under deposit.
L'invention a pour objet un dispositif simple, re- The subject of the invention is a simple device,
lativement peu coûteux pour assurer un auto-nettoyage perma- inexpensive to ensure permanent self-cleaning
nent de l'intérieur des tubes lorsque l'échangeur est en from the inside of the tubes when the heat exchanger is
service. Ce dispositif est placé dans chaque tube de l'ap- service. This device is placed in each tube of the
pareil.the same.
Le dispositif conforme à l'invention consiste en une spirale métallique élastique résistant à la corrosion et aux frottements, s'étendant sur toute la longueur des tubes, qui est mise en agitation par la circulation du fluide afin d'éviter, ou d'éliminer les dépôts sur la paroi interne des tubes. Suivant un premier mode de réalisation, on enfile The device according to the invention consists of an elastic metal spiral resistant to corrosion and friction, extending over the entire length of the tubes, which is agitated by the circulation of the fluid to avoid or eliminate deposits on the inner wall of the tubes. According to a first embodiment, one puts on
par aspiration, par exemple, un fil métallique de forme spi- by suction, for example, a spun-shaped wire
ralée allongée, de pas déterminé, allant de 1 à 7 fois le diamètre du tube, obtenu par étirage d'un ressort, dans un tube un peu plus long, pour tenir compte de l'allongement elongated elongation, not determined, ranging from 1 to 7 times the diameter of the tube, obtained by stretching a spring, in a slightly longer tube, to take account of the elongation
du fil spiralé en service.spiral wire in use.
La spirale est constituée d'un fil métallique de diamètre allant de 0,3 à 1 mm, résistant à la corrosion et à l'usure par frottement, tel qu'un fil de ressort en un métal ou un alliage convenable comme le titane écroui par The spiral consists of a wire with a diameter of 0.3 to 1 mm, resistant to corrosion and frictional wear, such as a spring wire of a suitable metal or alloy such as hardened titanium by
exemple, ou toute autre matière appropriée. example, or any other appropriate material.
La spirale allongée s'inscrit dans un cylindre fictif dont le diamètre est au moins égal à la moitié du The elongated spiral fits into a fictional cylinder whose diameter is at least equal to half
diamètre du tube.diameter of the tube.
La spirale est fixée dans le tube de manière souple The spiral is fixed in the tube flexibly
par une de ses extrémités, côté amont par rapport à l'écoule- at one of its ends, upstream side with respect to the
ment du fluide par un système d'accrochage qui peut être de même nature que le ressort, ou de nature différente. En effet ce système d'accrochage peut être une pièce rapportée, telle qu'une agrafe métallique en forme de U en même matière fluid by an attachment system which may be of the same nature as the spring, or of a different nature. Indeed this attachment system may be an insert, such as a U-shaped metal clip of the same material
que le ressort ou tout autre matériau résistant à la corro- the spring or any other material resistant to corrosion
sion et au frottement. Il peut encore être réalisé par la friction and friction. It can still be achieved by the
jonction des extrémités de deux fils adjacents entrecroisées. joining the ends of two adjacent crisscrossed wires.
Sous l'effet du courant en régime turbulent, la Under the effect of turbulent flow, the
spirale est agitée enpermanence, elle frappe et frotte ré- spiral is constantly agitated, strikes and rubs
gulièrement tous les points de la paroi intérieure du tube en tournant, créant ainsi un contact répétitif avec la paroi gully all the points of the inner wall of the tube while turning, thus creating a repetitive contact with the wall
intérieure. Une variation de débit du fluide véhiculé en- interior. A variation in the flow rate of the fluid conveyed
traîne une variation de la longueur du dispositif et par conséquent modifie les points de frappe et de frottement à dragging a variation in the length of the device and consequently modifying the points of striking and friction at
l'intérieur du tube.the inside of the tube.
L'invention est illustrée par les dessins et les The invention is illustrated by the drawings and the
exemples suivants donnés à titre indicatif mais non limitatif. following examples given for information but not limiting.
La fig. 1 représente une portion de plaque dans laquelle s'insèrent les tubes d'échangeur représentés par Fig. 1 represents a portion of plate in which the exchanger tubes represented by
leur section droite.their cross section.
La fig. 2-représente le schéma du dispositif d'essai en labo- Fig. 2 represents the diagram of the laboratory test device.
ratoire en coupe La fig. 3 représente un schéma d'installation- sur un tube in section Fig. 3 represents an installation diagram on a tube
d'échangeur en coupe.of exchanger in section.
EXEMPLE 1: Comme on l'a représenté fig. 2 L'essai est effectué en laboratoire sur un tube en verre, 1, de diamètre intérieur 15 mm. Laspirale, 2, est EXAMPLE 1 As shown in FIG. 2 The test is carried out in the laboratory on a glass tube, 1, with an inside diameter of 15 mm. Laspirale, 2, is
constituée d'un fil de 0,5 mm de diamètre en titane pour é- consisting of a 0.5 mm diameter titanium wire for
viter tout danger de corrosion, en service réel. Le pas, 3, du fil est de 30 mm. Le diamètre de la spirale est de 11 mm, elle est avoid any danger of corrosion, in real service. The pitch, 3, of the wire is 30 mm. The diameter of the spiral is 11 mm, it is
fixée par une agrafe, 4, à l'extrémité amont du tube. fixed by a clip, 4, at the upstream end of the tube.
Le fluide choisi est de l'eau,-pour pouvoir cons- The chosen fluid is water - to be able to
tater en milieu transparent le comportement du ressort étiré. tater in transparent medium the behavior of the stretched spring.
elle circule dans le sens indiqué par les flèches. it flows in the direction indicated by the arrows.
On a pu ainsi constater qu'à une vitesse d'écoule- It has thus been found that at a speed of
ment de 20 1/minute analogue à celle du brut dans les tubes d'un échangeur déterminé qui s'encrasse régulièrement, le 20 1 / minute similar to that of crude in the tubes of a specific exchanger which fouls regularly, the
fil métallique est animé d'un mouvement d'agitation perma- metal wire is animated by a movement of perma-
nent qui le met en contact avec les parois du tube. which puts it in contact with the walls of the tube.
EXEMPLE 2EXAMPLE 2
Un essai industriel- sur une centaine de tubes, 10, An industrial test - on a hundred tubes, 10,
disposés comme dans la fig. 1, de diamètre intérieur 15 mm. arranged as in fig. 1, of internal diameter 15 mm.
est réalisé avec des fils de titane spiralés de diamètre 0,5 mm. Le diamètre de la spirale est de 8 mm., et le pas de la spirale de 30 mm. Ces fils sont fixés à une extrémité -soit à une agrafe, soit deux par deux- par entortillage. Le is made with spiral titanium threads of diameter 0.5 mm. The diameter of the spiral is 8 mm., And the pitch of the spiral is 30 mm. These yarns are attached to one end - either a staple, two by two - by twisting. The
pétrole brut circule à une vitesse d'écoulement de 0,40 m./sec. crude oil circulates at a flow rate of 0.40 m./sec.
environ dans les tubes.about in the tubes.
Après une durée de fonctionnement de 240 jours environ, on a retiré quelques tubes équipés de fils spiralés After approximately 240 days of operation, some tubes with spiral wires were removed
et d'autres tubes non équipés.and other non-equipped tubes.
Après avoir coupé en deux un certain nombre de ces tubes dans le sens de la longueur, on a pu constater que les tubes qui étaient équipés d'une spirale présentaient une After cutting a number of these tubes in half lengthwise, it was found that the tubes which were equipped with a spiral had a
paroi interne propre alors que les autres tubes étaient en- clean inner wall while the other tubes were
crassés intérieurement.crushed inwardly.
EXEMPLE 3EXAMPLE 3
Un essai industriel sur un échangeur complet à 2 passes de tubes,diamètre intérieur 15 mm., est réalisé avec des fils titane spiralés, diamètre-des fils 0,6 mm., diamètre de la spirale 8 mm., pas de la spirale 30 mm. Ces fils sont fixés à l'extrémité côté entrée produit, par une agrafe ellemême en titane. Lé pétrole brut circule à une An industrial test on a complete exchanger with 2 passes of tubes, internal diameter 15 mm., Is made with spiral titanium wires, wire diameter 0.6 mm., Spiral diameter 8 mm., Spiral pitch 30 mm. These son are attached to the end product input side, by a clip itself titanium. Crude oil circulates at a
vitesse d'écoulement de 0,40 m/sec. environ dans les tubes. flow rate of 0.40 m / sec. about in the tubes.
Après une durée de fonctionnement de 140 jours environ, on a comparé la salissure des tubes de cet échangeur After an operating time of about 140 days, the soiling of the tubes of this exchanger was compared
avec ceux d'un même échangeur ayant un service identique. with those of the same exchanger having an identical service.
Les tubes de l'échangeur non équipé présentaient une salissure interne notable. Une campagne de mesures comparatives de l'évolution des taux de transfert thermique de ces deux The tubes of the unaccompanied heat exchanger showed a notable internal stain. A campaign of comparative measurements of the evolution of the heat transfer rates of these two
échangeurs montre l'avantage du dispositif spiralé. exchangers shows the advantage of the spiral device.
On constate que l'échangeur thermique équipé du dispositif d'autonettoyage conforme à l'invention conserve ses performances thermiques, alors que l'échangeur non équipé présente une diminution progressive de ses performances dẻ It is found that the heat exchanger equipped with the self-cleaning device according to the invention retains its thermal performance, while the unaccompanied exchanger has a progressive decrease in its performance dẻ
à l'encrassement progressif.to progressive fouling.
Le dispositif selon l'invention permet donc de ne pas perdre d'énergie calorifique, et de conserver un taux de transfert thermique maximum et constant dans le temps - Un autre avantage économique tient au fait que le prix de la fourniture et de la pose est du même ordre de grandeur que le prix du nettoyage de l'échangeur, et l'investissement peut -être remboursé très rapidement par les économies d'énergie The device according to the invention therefore makes it possible not to lose heat energy, and to maintain a maximum and constant heat transfer rate over time. Another economic advantage is that the price of the supply and the installation is the same order of magnitude as the price of cleaning the heat exchanger, and the investment can be reimbursed very quickly by energy savings
et la suppression des frais de nettoyage. and the removal of cleaning fees.
Claims (5)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8007856A FR2479964A1 (en) | 1980-04-08 | 1980-04-08 | SELF-CLEANING SYSTEM ON TUBE COIL EXCHANGERS |
| DE19818110199U DE8110199U1 (en) | 1980-04-08 | 1981-04-03 | DEVICE FOR SELF-CLEANING HEAT EXCHANGE PIPES |
| GB8110658A GB2073357B (en) | 1980-04-08 | 1981-04-06 | System for cleaning tube-type heat exchangers automatically during operation |
| ES1981264968U ES264968Y (en) | 1980-04-08 | 1981-04-06 | RUNNING SELF-CLEANING DEVICE FOR EXCHANGED TUBES. |
| LU83284A LU83284A1 (en) | 1980-04-08 | 1981-04-07 | SELF-CLEANING SYSTEM ON THE TUBE SIDE EXCHANGERS |
| BE0/204394A BE888308A (en) | 1980-04-08 | 1981-04-07 | PERMANENT SELF-CLEANING SYSTEM IN OPERATION OF TUBE SIDE EXCHANGER TUBES, |
| IT20981/81A IT1137667B (en) | 1980-04-08 | 1981-04-08 | SELF-CLEANING DEVICE FOR EXCHANGERS ON THE SIDE OF THE PIPES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8007856A FR2479964A1 (en) | 1980-04-08 | 1980-04-08 | SELF-CLEANING SYSTEM ON TUBE COIL EXCHANGERS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2479964A1 true FR2479964A1 (en) | 1981-10-09 |
| FR2479964B1 FR2479964B1 (en) | 1982-05-14 |
Family
ID=9240629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8007856A Granted FR2479964A1 (en) | 1980-04-08 | 1980-04-08 | SELF-CLEANING SYSTEM ON TUBE COIL EXCHANGERS |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE888308A (en) |
| DE (1) | DE8110199U1 (en) |
| ES (1) | ES264968Y (en) |
| FR (1) | FR2479964A1 (en) |
| GB (1) | GB2073357B (en) |
| IT (1) | IT1137667B (en) |
| LU (1) | LU83284A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19544185A1 (en) * | 1995-11-28 | 1997-06-05 | Renzmann Und Gruenewald Gmbh | Industrial heat exchanger with tube bundle inserts |
| EP1227292A2 (en) | 2001-01-30 | 2002-07-31 | Elf Antar France | Device for reducing clogging of a shell-and-tube heat exchanger |
| WO2010076446A1 (en) | 2008-12-19 | 2010-07-08 | Total Raffinage Marketing | Device for reducing fouling inside a tube |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2569829B1 (en) * | 1984-08-31 | 1989-06-16 | Raffinage Cie Francaise | METHOD AND MECHANICAL DEVICE FOR IMPROVING THERMAL TRANSFERS AND FOR PREVENTING FOULING OF HEAT EXCHANGERS |
| FR2592924B1 (en) * | 1986-01-10 | 1989-10-20 | Total France | DEVICE FOR HOLDING THE END OF A MOBILE ELEMENT IN A POSITION, ROTATING DRIVE IN A TUBE AND APPLICATION TO PREVENTING FOULING AND CLEANING OF THIS TUBE. |
| CN101210791B (en) * | 2006-12-29 | 2010-11-10 | 北京华夏英蓝科技发展有限公司 | Self-cleaning reinforcement heat transfer low flow resistance rotor in heat-transfer pipe |
| CN102128560B (en) * | 2011-04-19 | 2012-10-17 | 北京化工大学 | Twisted ribbon pendant inside the heat exchange tube |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE389314A (en) * | ||||
| US3409470A (en) * | 1966-06-27 | 1968-11-05 | Dow Chemical Co | Cyclic water hammer method |
| FR2435292A1 (en) * | 1978-09-06 | 1980-04-04 | Mitsui Toatsu Chemicals | SCRAPER DEVICE FOR REMOVING DEPOSITS ON THE INTERNAL WALL OF TUBES |
-
1980
- 1980-04-08 FR FR8007856A patent/FR2479964A1/en active Granted
-
1981
- 1981-04-03 DE DE19818110199U patent/DE8110199U1/en not_active Expired
- 1981-04-06 GB GB8110658A patent/GB2073357B/en not_active Expired
- 1981-04-06 ES ES1981264968U patent/ES264968Y/en not_active Expired
- 1981-04-07 LU LU83284A patent/LU83284A1/en unknown
- 1981-04-07 BE BE0/204394A patent/BE888308A/en not_active IP Right Cessation
- 1981-04-08 IT IT20981/81A patent/IT1137667B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE389314A (en) * | ||||
| US3409470A (en) * | 1966-06-27 | 1968-11-05 | Dow Chemical Co | Cyclic water hammer method |
| FR2435292A1 (en) * | 1978-09-06 | 1980-04-04 | Mitsui Toatsu Chemicals | SCRAPER DEVICE FOR REMOVING DEPOSITS ON THE INTERNAL WALL OF TUBES |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19544185A1 (en) * | 1995-11-28 | 1997-06-05 | Renzmann Und Gruenewald Gmbh | Industrial heat exchanger with tube bundle inserts |
| DE19544185C2 (en) * | 1995-11-28 | 1998-08-13 | Renzmann Und Gruenewald Gmbh | Heat exchanger |
| EP1227292A2 (en) | 2001-01-30 | 2002-07-31 | Elf Antar France | Device for reducing clogging of a shell-and-tube heat exchanger |
| FR2820197A1 (en) | 2001-01-30 | 2002-08-02 | Elf Antar France | FOULING REDUCTION DEVICE OF A TUBULAR HEAT EXCHANGER |
| US6782943B2 (en) | 2001-01-30 | 2004-08-31 | Elf Antar France | Fouling reduction device for a tubular heat exchanger |
| EP1227292A3 (en) * | 2001-01-30 | 2005-09-28 | Elf Antar France | Device for reducing clogging of a shell-and-tube heat exchanger |
| WO2010076446A1 (en) | 2008-12-19 | 2010-07-08 | Total Raffinage Marketing | Device for reducing fouling inside a tube |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8110199U1 (en) | 1981-10-15 |
| IT1137667B (en) | 1986-09-10 |
| ES264968Y (en) | 1983-07-01 |
| IT8120981A0 (en) | 1981-04-08 |
| BE888308A (en) | 1981-07-31 |
| FR2479964B1 (en) | 1982-05-14 |
| GB2073357B (en) | 1984-06-06 |
| GB2073357A (en) | 1981-10-14 |
| LU83284A1 (en) | 1981-07-23 |
| ES264968U (en) | 1983-01-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse | ||
| D3 | Ip right revived |