FR2841154A1 - Rotating agitator comprises heated surface for liquid, powder or paste medium - Google Patents
Rotating agitator comprises heated surface for liquid, powder or paste medium Download PDFInfo
- Publication number
- FR2841154A1 FR2841154A1 FR0207559A FR0207559A FR2841154A1 FR 2841154 A1 FR2841154 A1 FR 2841154A1 FR 0207559 A FR0207559 A FR 0207559A FR 0207559 A FR0207559 A FR 0207559A FR 2841154 A1 FR2841154 A1 FR 2841154A1
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- Prior art keywords
- support
- resistance
- electrical
- connections
- agitator
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
- H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
- H05B3/262—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base the insulating base being an insulated metal plate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/90—Heating or cooling systems
- B01F35/95—Heating or cooling systems using heated or cooled stirrers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/78—Heating arrangements specially adapted for immersion heating
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Accessories For Mixers (AREA)
Abstract
Description
o de production d'hydrogene sensiblement puno significantly punctuated hydrogen production
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Les industries chimique et agro-alimentaire utilisent des cuves a double enveloppe pour le rechauffage, la cuisson ou le maintien en temperature de produits tres divers: huile, peinture, graisse, plastiques... (industrie chimique) - chocolat, yaourt, melasse...(industrie agro- alimentaire). Ces cuves vent equipees de melangeurs The chemical and agro-food industries use double-jacketed tanks for reheating, cooking or keeping temperature of very diverse products: oil, paint, grease, plastics ... (chemical industry) - chocolate, yogurt, molasses. ..(food industry). These wind tanks fitted with mixers
S pour rendre le transfert thermique plus homogene et plus aise. S to make the heat transfer more homogeneous and easier.
Lorsque les besoins du procede en energie thermique vent faibles, les cuves equipees d'une paroi a double enveloppe suffisent a apporter a elles seules toute la chaleur necessaire. Pour les operations qui necessitent un apport de chaleur plus important, il est souvent necessaire d'augmenter la surface d'echange thermique en installant a l'interieur de la cove un ou plusieurs systemes a circulation de fluide When the thermal energy requirements of the process are low, the tanks fitted with a double-walled wall are sufficient to provide all the necessary heat by themselves. For operations that require more heat, it is often necessary to increase the heat exchange surface by installing one or more fluid circulation systems inside the cove.
caloporteur: reseau de serpentine, chicanes a double-enveloppe et tubes verticaux. heat transfer medium: serpentine network, double-jacket baffles and vertical tubes.
D'une maniere generale, on peut affirmer que les conditions d'echanges thermiques entre le produit a traiter et ['element chauffant vent particulierement favorables en cuve agitee, la convection forcee assurant un bon transfert de matiere et In general, it can be said that the conditions of heat exchange between the product to be treated and the heating element are particularly favorable in agitated tanks, forced convection ensuring good transfer of matter and
1S par suite un transfert de chaleur performant (voir figure 1). 1S as a result of efficient heat transfer (see Figure 1).
L'echange thermique etant tres bon, pour pouvoir transferer un maximum d'energie thermique a un produit en cuve agitee, il suffit d'apporter une grande quantite de chaleur au produit par l'intermediaire du systeme de chauffage, a savoir le The heat exchange being very good, to be able to transfer a maximum of thermal energy to a product in agitated tank, it is enough to bring a great quantity of heat to the product via the heating system, namely the
fluide caloporteur, lequel agit a temperature imposee. heat transfer fluid, which acts at a prescribed temperature.
Toutefois, la puissance thermique transferee au produit est limitee par la temperature du fluide caloporteur et son debit. Les conditions tres favorables d'echange thermique ne vent pas exploitees de maniere optimale: aussi grand que soit le coefficient d'echange thermique au sein de la cuve, on ne pourra pas forcement apporter une energie thermique suffisante par ce biais. La densite de puissance However, the thermal power transferred to the product is limited by the temperature of the heat transfer fluid and its flow rate. The very favorable conditions of heat exchange are not exploited in an optimal way: as great as is the coefficient of heat exchange within the tank, it will not necessarily be possible to provide sufficient thermal energy through this. Power density
thermique surfacique de ces elements chauffants fixes peut etre insuffisante. surface thermal of these fixed heating elements may be insufficient.
C'est pourquoi il avait ete egalement envisage d'equiper de pales agitatrices chauffantes les cuves d'echange thermique du genre en question, un fluide caloporteur This is why it was also envisaged to equip with heat-agitating blades the heat exchange tanks of the kind in question, a heat-transfer fluid.
gazeux ou liquide etant mis en circulation dans des pales creuses de l'agitateur. gaseous or liquid being circulated in hollow blades of the agitator.
Cependant cette solution ne peut etre entierement satisfaisante, devant mettre en ceuvre des joints tournants de fabrication et d'entretien couteux. En outre, les systemes a circulation de fluide caloporteur n'offrent pas une precision de regulation satisfaisante, du fait de leur inertie thermique, qui allonge le temps de reponse, et de la necessite de However, this solution cannot be entirely satisfactory, having to implement expensive manufacturing and maintenance rotary joints. In addition, systems with circulation of heat transfer fluid do not offer satisfactory regulation precision, because of their thermal inertia, which lengthens the response time, and the need to
mesurer la temperature du fluide caloporteur. measure the temperature of the heat transfer fluid.
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La presente invention concerne done un agitateur rotatif a surface chauffante pour milieu liquide, pulverulent ou pateux, lequel agitateur est monte sur un arbre moteur propre a l'entraner en rotation dans ledit milieu pour ['agitation et le chauffage de celui-ci, le but de ['invention etant notamment de rendre plus facile et plus precise la regulation de la temperature d'un tel agitateur, et a moindre cout, avec des astreintes quant a l'entretien tres faibles, et ceci sous des puissances de chauffage importantes. A cet effet, un agitateur conforme a ['invention et evitant les inconvenients des differentes techniques anterieures evoquees plus haut est caracterise en ce qutun support de ladite surface chauffante porte une resistance electrique reliee par des connexions electriques a une ligne d'amenee de courant passant le long audit arbre, cette li gne etant elle-meme reliee a une source d' alimentati on en courant par The present invention therefore relates to a rotary agitator with a heating surface for a liquid, pulverulent or pasty medium, which agitator is mounted on a motor shaft suitable for driving it in rotation in said medium for stirring and heating thereof, the aim of the invention being in particular to make it easier and more precise to regulate the temperature of such an agitator, and at a lower cost, with very low maintenance requirements, and this under high heating powers. To this end, an agitator according to the invention and avoiding the drawbacks of the various prior techniques mentioned above is characterized in that a support for said heating surface carries an electrical resistance connected by electrical connections to a passing current supply line. along said tree, this line itself being connected to a source of power supplied by
l'intermediaire de contacts frottants. through rubbing contacts.
Tout en conservant l'avantage de ['excellent transfert thermique procure par les pales chauffantes, on pourra augmenter ainsi considerablement la puissance calorifique developpee par la surface chauffante, ce qui evitera la presence a l'interieur de la cuve de reseaux de serpentine, chicanes ou tubes verticaux difficiles a nettoyer en presence de normes d'hygiene draconiennes, notamment dans les industries agroalimentaires, chimiques et cosmetiques. En outre et contrairement a ce qui est le cas avec un fluide caloporteur qui travaille a temperature imposee, on pourra travailler a puissance imposee importante et controler facilement cette puissance, par un contr81e classique de la puissance electrique alimentant la resistance equipant ladite surface chauffante. Une thermistance completera avantageusement le contrOle fin et precis du While retaining the advantage of the excellent heat transfer provided by the heating blades, it will be possible to considerably increase the calorific power developed by the heating surface, which will avoid the presence inside the tank of serpentine networks, baffles or vertical tubes difficult to clean in the presence of strict hygiene standards, especially in the food, chemical and cosmetic industries. In addition and contrary to what is the case with a heat transfer fluid which works at imposed temperature, one will be able to work with important imposed power and easily control this power, by a conventional control of the electric power supplying the resistance equipping said heating surface. A thermistor will advantageously complete the fine and precise control of the
traitement thermique et du procede.heat treatment and process.
Avantageusement, la resistance electrique sera constituee d'une encre resistive deposee sur le support de la surface chauffante par un procede de type serigraphique. L'avantage des resistances serigraphiees pour cette application reside d' une part dans le faible cout de mise en oeuvre de cette technologie et d' autre part dans la forte densite de puissance surfacique que l'on peut atteindre grace a ce procede: jusqu'a 120 W/cm2, avec une masse reduite et une inertie thermique tres faible. Cette derriere caracteristique permet d'envisager en particulier la possibilite de Advantageously, the electrical resistance will consist of a resistive ink deposited on the support of the heating surface by a process of serigraphic type. The advantage of the screen-printed resistors for this application lies on the one hand in the low cost of implementation of this technology and on the other hand in the high density of surface power which can be achieved by this process: up to at 120 W / cm2, with reduced mass and very low thermal inertia. This behind characteristic makes it possible to envisage in particular the possibility of
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remplacer tout un systeme de chauffage par double enveloppe grace a celui constitue replace an entire double jacket heating system with one
avec les resistances (en fonction de la puissance qui pourra etre apportee par ce biais). with resistors (depending on the power that can be provided through this).
De preference, on prevoira encore que ladite resistance est recouverte d'une couche de ceramique vitreuse d'isolement et de protection, les connexions Preferably, it will also be provided that said resistance is covered with a layer of vitreous ceramic insulation and protection, the connections
S electriques etant quant a elles recouvertes d'une couche de resine. S electric being covered with a layer of resin.
Par ailleurs, en en cas de surface chauffante a support metallique, une Furthermore, in the case of a metal-supported heating surface, a
couche de dielectrique pourra etre interposee entre ce support et ladite resistance. dielectric layer may be interposed between this support and said resistance.
Des modes d'execution de ['invention vont maintenant etre decrits a titre d'exemples nullement limitatifs avec reference aux figures du dessin ciannexe dans lequel: - la figure 1 est le schema simplifie d'une cuve a echange thermique classique; - la figure 2 est le schema d'une cuve a echange thermique equipee conformement a ['invention; - la figure 3 est une vue en plan schematique d'une surface chauffante de l'agitateur, montrant le dessin de la resistance electrique, la figure 3a etant une variante representee en perspective; - la figure 4 est une vue en coupe longitudinale de la surface chauffante de la figure 3; - la figure 5 est une vue en coupe d'une connexion par contact; - la figure 6 est un graphique montrant le profil des temperatures du milieu chauffe dans la cuve et de la surface de l'agitateur; et - les figures 7a et 7b montrent en perspective un autre mode de realisation Embodiments of the invention will now be described by way of non-limiting examples with reference to the figures of the appended drawing in which: - Figure 1 is the simplified diagram of a conventional heat exchange tank; - Figure 2 is the diagram of a heat exchange tank equipped in accordance with the invention; - Figure 3 is a schematic plan view of a heating surface of the agitator, showing the drawing of the electrical resistance, Figure 3a being a variant shown in perspective; - Figure 4 is a longitudinal sectional view of the heating surface of Figure 3; - Figure 5 is a sectional view of a contact connection; - Figure 6 is a graph showing the temperature profile of the heated medium in the tank and the surface of the agitator; and - Figures 7a and 7b show in perspective another embodiment
de ['invention.of the invention.
Dans la figure 1, on a montre une cuve 1 de type connu a double paroi 2 a l'interieur de laquelle est installe un serpentin 3 parcouru par un fluide caloporteur. Le milieu chauffe 4 est agite par des pales d'agitateur S non chauffees, montees sur un In Figure 1, there is shown a tank 1 of known type with double wall 2 inside which is installed a coil 3 through which a heat transfer fluid. The heated medium 4 is stirred by unheated stirrer blades S, mounted on a
arbre rotatif 6 entra^ne par un moteur electrique 7. rotary shaft 6 driven by an electric motor 7.
Dans la figure 2 qui represente une cuve equipee conformement a ['invention, on a utilise les memes references que sur la figure 1 pour designer les memes elements ou leurs equivalents. L'agitateur comporte ici des pales 8 dont la surface est chauffee par des resistances electriques 9 dont un dessin possible est represente aux figures 3 et 4. Ces resistances 9 peuvent etre facilement obtenues par In FIG. 2 which represents a tank fitted in accordance with the invention, the same references have been used as in FIG. 1 to designate the same elements or their equivalents. The agitator here comprises blades 8, the surface of which is heated by electrical resistors 9, a possible design of which is shown in FIGS. 3 and 4. These resistors 9 can be easily obtained by
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dep8t sur le support 8a des pales 8 d'une encre resistive selon un procede analogue a la serigraphie. Chaque resistance est recouverte d'une couche de ceramique vitreuse d'isolement et de protection 10. Si le support 8a est en acier ou autre metal, une couche dep8t on the support 8a of the blades 8 of a resistive ink according to a process analogous to screen printing. Each resistance is covered with a layer of vitreous ceramic insulation and protection 10. If the support 8a is made of steel or other metal, a layer
de dielectrique 11 est interposee entre lui et la resistance 9. of dielectric 11 is interposed between it and the resistor 9.
Les connexions electriques 12 de cette resistance 9 vent reliees a une ligne d'amenee de courant (non representee) passant dans l'arbre d'entra^nement creux 6 de l'agitateur, cette ligne etant elle-meme reliee a une source d'alimentation en courant par The electrical connections 12 of this resistor 9 wind connected to a current supply line (not shown) passing through the hollow drive shaft 6 of the agitator, this line itself being connected to a source of current supply by
l'intermediaire de contacts frottants, ceci de maniere en soi connue. by means of rubbing contacts, in a manner known per se.
En 9t, on a represente une thermistance egalement serigraphiee, permettant de mesurer la temperature de la pale 8, et done de contr81er cette temperature, en In 9t, a thermistor is also screen printed, making it possible to measure the temperature of the blade 8, and therefore to control this temperature, by
agissant par exemple sur la tension de la source d'alimentation en courant precitee. acting for example on the voltage of the aforementioned current supply source.
Les connexions electriques 12 peuvent etre soudees ou realisees par contact. Dans le cas de connexions electriques soudees, il faut evidemment veiller a ce que les temperatures maximales atteintes par la pale 8 au cours de son fonctionnement ne provoquent par la fusion de ces connexions, ce qui necessite ltemploi d'une soudure en materiau approprie ou de deporter les connexions dans une zone plus froide que la surface chauffante de la pale. Pour ce faire, on peut proceder comme represente sur la figure 3a, dans laquelle on a represente une pale 8 dont les connexions 12 qui vent reliees a la resistance electrique serigraphiee 9 vent portees a l'extremite eloignee d'une barrette isolante 8b reliee au support 8a de la pale 8, la liaison electrique 9a entre les connexions 12 et la resistance 9 etant constituee d'une piste conductrice a falble resistivite, done tres faiblement chauffante. Ainsi il n'y a pas risque de fusion des connexions soudees 12, meme si le support de pale 8a atteint une The electrical connections 12 can be welded or made by contact. In the case of soldered electrical connections, it is obviously necessary to ensure that the maximum temperatures reached by the blade 8 during its operation do not cause the fusion of these connections, which necessitates the use of a weld of suitable material or deport the connections to a cooler area than the heating surface of the blade. To do this, we can proceed as shown in Figure 3a, in which we have shown a blade 8 whose connections 12 which wind connected to the screen printed electrical resistance 9 wind brought to the far end of an insulating strip 8b connected to the support 8a of the blade 8, the electrical connection 9a between the connections 12 and the resistor 9 being constituted by a conductive track with low resistivity, therefore very weakly heating. Thus there is no risk of fusion of the soldered connections 12, even if the blade support 8a reaches a
temperature elevee.high temperature.
La protection et ['isolation de telles connexions electriques peuvent etre obtenues soit en deposant sur elles une couche de resine isolante capable de resister a la temperature, soit en les recouvrant d'un depOt de ceramique realise a une temperature inferieure a la temperature risquant d'endommager la soudure, par The protection and insulation of such electrical connections can be obtained either by depositing on them a layer of insulating resin capable of withstanding temperature, or by covering them with a ceramic deposit made at a temperature below the temperature risking d '' damage the weld,
exemple 200 C.example 200 C.
Une connexion electrique realisee par contact a ete representee a titre An electrical connection made by contact has been shown as
d'exemple a la figure 5.example in Figure 5.
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s La liaison electrique entre un conducteur de raccordement 13 a la source de courant et une piste argentee 14 en liaison avec la resistance de chauffage 9 est assuree par l'intermediaire de l'extremite recourbee et elastique 15 d'une lamelle en laiton dont un ceillet 16 est engage sur une vis a tete conique en laiton 17 gainee par un tube S isolant 26 et serree sur le support 8a de la pale. L'empilage du conducteur 13, de l'acillet 16 et d'une rondelle eventail 18 de compensation des dilatations de la vis est enserre entre deux rondelles de ceramique 19 et 20, et ['ensemble est serre sur la vis s The electrical connection between a connection conductor 13 to the current source and a silver track 14 in connection with the heating resistor 9 is provided by means of the bent and elastic end 15 of a brass strip, one of which eyelet 16 is engaged on a conical brass head screw 17 sheathed by an insulating tube S 26 and tightened on the support 8a of the blade. The stack of the conductor 13, of the acillet 16 and of a fan washer 18 for compensating for the expansions of the screw is clamped between two ceramic washers 19 and 20, and the assembly is tightened on the screw
par un ecrou 21.with a nut 21.
La figure 6 montre a titre d'exemple, en 22 ['evolution dans le temps du profil des temperatures du milieu 4 chauffe dans la cuve 1, et en 23 du profil de la temperature des pales 8 d'un agitateur conforme a ['invention, ceci pour une cuve contenant 150 litres d'eau. La temperature de l'eau passe en environ 80 mn de 25 a C avec une puissance electrique d'environ 10 kW et une temperature de surface FIG. 6 shows by way of example, at 22 ['evolution over time of the temperature profile of the medium 4 heated in the tank 1, and at 23 of the temperature profile of the blades 8 of an agitator conforming to [' invention, this for a tank containing 150 liters of water. The water temperature drops in about 80 minutes from 25 to C with an electrical power of about 10 kW and a surface temperature
allant de 80 a 160 C.ranging from 80 to 160 C.
On pourra bien entendu conferer a la surface chauffante toute forme de pale tournante connue, notamment a surfaces planes inclinees sur l'axe ou non, incurvees ou helicoidales, du genre a turbine a disque de type Rushton, etc. Aux figures 7a et 7b on a represente une autre variante selon laquelle la resistance chauffante serigraphiee 9b est inscrite sur un film souple silicone 24, un tel film pouvant alors etre dispose dans un fourreau metallique protecteur 25 constituent une pale creuse propre a etre montee sur l'arbre tournant de l'agitateur. L'espace interstitial menage entre ce film 24 et la paroi interne du fourreau 25 pourra etre rempli It is of course possible to confer on the heating surface any form of known rotating blade, in particular with flat surfaces inclined on the axis or not, curved or helical, of the Rushton type disc turbine type, etc. In FIGS. 7a and 7b there is shown another variant according to which the screen-printed heating resistance 9b is inscribed on a flexible silicone film 24, such a film then being able to be placed in a protective metal sheath 25 constitute a hollow blade suitable for being mounted on the rotating shaft of the agitator. The interstitial space between this film 24 and the inner wall of the sleeve 25 can be filled
d'une graisse speciale de couplage therrnique. a special thermal coupling grease.
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Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0207559A FR2841154B1 (en) | 2002-06-19 | 2002-06-19 | ROTARY AGITATOR WITH A HEATING SURFACE FOR A LIQUID, PULVERULENT OR PASTY ENVIRONMENT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0207559A FR2841154B1 (en) | 2002-06-19 | 2002-06-19 | ROTARY AGITATOR WITH A HEATING SURFACE FOR A LIQUID, PULVERULENT OR PASTY ENVIRONMENT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2841154A1 true FR2841154A1 (en) | 2003-12-26 |
| FR2841154B1 FR2841154B1 (en) | 2005-03-25 |
Family
ID=29719871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0207559A Expired - Fee Related FR2841154B1 (en) | 2002-06-19 | 2002-06-19 | ROTARY AGITATOR WITH A HEATING SURFACE FOR A LIQUID, PULVERULENT OR PASTY ENVIRONMENT |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2841154B1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009069161A1 (en) * | 2007-11-29 | 2009-06-04 | Energy & Ecology S.R.L. | Method for the thermocatalytic depolymerisation of plastic material |
| CN102989348A (en) * | 2012-12-06 | 2013-03-27 | 江苏美科硅能源有限公司 | Slurry tank |
| CN103877891A (en) * | 2013-05-30 | 2014-06-25 | 青岛科技大学 | Misplaced six-bend-blade combined propeller efficient stirring device |
| CN105289374A (en) * | 2015-12-04 | 2016-02-03 | 重庆市贵荣塑胶制品有限公司 | UV pain stirring device |
| CN105854693A (en) * | 2016-06-02 | 2016-08-17 | 范素琴 | Pharmaceutical stirring equipment with cleaning function |
| CN109012347A (en) * | 2018-08-09 | 2018-12-18 | 田晓梅 | A kind of material heating device with efficient mixed function |
| WO2019001815A1 (en) * | 2017-06-27 | 2019-01-03 | Hans Heidolph GmbH | Blending device, in particular a hand blender |
| CN111761707A (en) * | 2020-07-09 | 2020-10-13 | 林学文 | Automatic-weighing batching device and method for processing concrete pipe pile |
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| FR2775621A1 (en) * | 1998-03-03 | 1999-09-10 | Etia Evaluation Technologique | Device for mixing and heat treating solids or liquids, using electrical conductors for heating |
| US20010014373A1 (en) * | 1999-08-09 | 2001-08-16 | Hongy Lin | Method of manufacturing an aluminum substrate thick film heater |
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| US3589834A (en) * | 1969-04-04 | 1971-06-29 | Dynamics Corp America | Helical blade mixer with heating device |
| GB2153190A (en) * | 1984-01-14 | 1985-08-14 | Emi Ltd | Improvements in or relating to heaters for water vessels |
| US4678881A (en) * | 1985-05-28 | 1987-07-07 | The Electricity Council | Induction apparatus for heating and mixing a fluid |
| EP0470718A2 (en) * | 1990-08-07 | 1992-02-12 | Ea Technology Limited | Heated rotor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009069161A1 (en) * | 2007-11-29 | 2009-06-04 | Energy & Ecology S.R.L. | Method for the thermocatalytic depolymerisation of plastic material |
| CN102989348A (en) * | 2012-12-06 | 2013-03-27 | 江苏美科硅能源有限公司 | Slurry tank |
| CN103877891A (en) * | 2013-05-30 | 2014-06-25 | 青岛科技大学 | Misplaced six-bend-blade combined propeller efficient stirring device |
| CN105289374A (en) * | 2015-12-04 | 2016-02-03 | 重庆市贵荣塑胶制品有限公司 | UV pain stirring device |
| CN105854693A (en) * | 2016-06-02 | 2016-08-17 | 范素琴 | Pharmaceutical stirring equipment with cleaning function |
| WO2019001815A1 (en) * | 2017-06-27 | 2019-01-03 | Hans Heidolph GmbH | Blending device, in particular a hand blender |
| CN109012347A (en) * | 2018-08-09 | 2018-12-18 | 田晓梅 | A kind of material heating device with efficient mixed function |
| CN111761707A (en) * | 2020-07-09 | 2020-10-13 | 林学文 | Automatic-weighing batching device and method for processing concrete pipe pile |
Also Published As
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|---|---|
| FR2841154B1 (en) | 2005-03-25 |
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