EP0579073A1 - Elektromagnetischer Behandlungsvorrichtung zum Aufheizen und Mischen von Flüssigkeiten - Google Patents

Elektromagnetischer Behandlungsvorrichtung zum Aufheizen und Mischen von Flüssigkeiten Download PDF

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Publication number
EP0579073A1
EP0579073A1 EP93110683A EP93110683A EP0579073A1 EP 0579073 A1 EP0579073 A1 EP 0579073A1 EP 93110683 A EP93110683 A EP 93110683A EP 93110683 A EP93110683 A EP 93110683A EP 0579073 A1 EP0579073 A1 EP 0579073A1
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EP
European Patent Office
Prior art keywords
disk
core assembly
disks
processor according
liquid
Prior art date
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Withdrawn
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EP93110683A
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English (en)
French (fr)
Inventor
Thomas Margittai
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Individual
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Individual
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Publication date
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Publication of EP0579073A1 publication Critical patent/EP0579073A1/de
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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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/421—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path
    • B01F25/422—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path between stacked plates, e.g. grooved or perforated plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • 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
    • B01F35/94—Heating or cooling systems using radiation, e.g. microwaves or electromagnetic radiation
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/14—Tools, e.g. nozzles, rollers, calenders

Definitions

  • the invention relates to an electromagnetic processor for heating and mixing liquids according to the precharacterising part of claim 1.
  • the processor may be used for liquids or pastes such as food, pharmaceuticals, and delicate chemical products.
  • the purpose of this invention is to create heating and mixing of highly delicate and sensitive liquids or pastes where both mixing and heating must be carefully and properly controlled at the same time.
  • Electromagnetic heating is used in the domestic area to heat small quantities of foods with much success. Most commonly processed products themselves are inherently of poor radiation absorbing nature. Conventional microwave ovens heat the pre-processed food directly, literally bombarding the products with microwave energy. A heating and mixing system wherein the introduction of highly electrically conductive materials into the flow path exposed to electromagnetic energy can improve the whole process.
  • US-A-3 814 889 describes a heat exchanger which uses microwave electromagnetic energy to heat or pasteurize milk by passing free-falling milk through a microwave field. Studies on similar technology have shown that the process is prohibitively costly and complex.
  • US-A 3 974 335 describes a process for the preservation of homogenous foodstuffs containing water or protein. However, this was used to pasteurize pre-packaged yogurt, as opposed to continuous flow food processing.
  • the invention aims at developing an electromagnetic processor for heating and mixing liquids which processor overcomes the above stated problems in the prior art and successfully utilizes electromagnetic energy to heat and mix at the same time large quantities of liquids in steady flow.
  • the invention suggests an electromagnetic processor for heating and mixing liquids according to the introductory part of claim 1, which is characterized by the features of the characterizing part of claim 1.
  • the heating elements of the core assembly consist of electrically conductive material which may be magnetic (exhibiting ferromagnetism) or non-magnetic.
  • electrically conductive material which may be magnetic (exhibiting ferromagnetism) or non-magnetic.
  • Such materials are, for example, stainless steel, nickel, chromium, aluminium, titanium, iron ferrous metal or others.
  • the invention is based on the idea that, different from conventional heating elements, the heat-transferring metal surface can be heated by means other than a separate liquid heating medium in such a way that the acting surface area by the use of both sides of the heat-transferring elements can be doubled significantly thus reducing the complications and the size of the device.
  • the basic concept of the invention is as follows: Metals are excellent absorbers of electromagnetic radiation while liquids and pastes resist to absorb electromagnetic radiation. Opposed to direct irradiation of the liquids or pastes themselves, the invention suggests to place a metal core into an alternating electromagnetic field where the metal core is heated up by the flow of eddy currents induced therein by said magnetic field generated by an electromagnetic coil which surrounds the core and is connected to an electric power source of convenient voltage and frequency.
  • the electric power source may be of the available local common voltage and frequency so that neither a voltage transformer nor a frequency converter is required. Of course, other frequencies and voltages may be used.
  • the heat generated in the metal elements of the core is then transferred to the liquid by contact during its flow through channels in the core.
  • the product is mixed very efficiently, even if it is of higher viscosity or contains solid particles.
  • the purpose of this invention is to create heating and mixing of highly delicate and sensitive liquids or pastes, such as products of food, pharmaceutical, light chemical and other industries, where the mixing and heating both at the same time must be carefully and properly controlled.
  • the invention may be implemented by a great variety of embodiments.
  • the basic tenor of all embodiments is to place a core assembly consisting of metallic elements into an alternating magnetic field and to transfer the heat generated in said metallic elements to the liquid to be processed which is brought into direct contact with said metallic elements.
  • the core assembly may be placed inside a cylindrical container of electrically insulating and magnetically inert material, which container has an inlet and outlet for the liquid and is surrounded by said electromagnetic coil.
  • the container may consist for example of glass, ceramics, china or plastic.
  • the core assembly should be, (but not exclusively), the shape of a cylinder where the liquid flows form one end to the other end in a permanent fashion.
  • Inside of the cylinder are located any number of metal disks snug but not solidly pressed to the wall of the cylinder. These metal disks are stabilized on a central shaft one to the other with consistent gap between them.
  • Each metal disk has an opening or removed portion near its periphery.
  • the disks are arranged to each other such that said openings or removed portions are angularly displaced from disk to disk in a way to establish a flow pattern whereby the liquid flows from one disk to the next one in an zigzagging way, whereby the heating and mixing is going to be consistent and very intensive.
  • This core assembly can be made of the most indated metal at calculated distances in between, and of any thickness as the conditions dictate.
  • a shaft holds the elements together whereby the whole bundle can be placed inside an insulating cylinder or pulled out without any problem.
  • end plates properly insulated, containing gaskets to prevent leakage between the cylinder and the two end plates.
  • Tie-rods preferably four, are provided to keep the end plates' flanges pressed properly to the end of said cylinder.
  • the core assembly is in the form of a continuous crew, called an auger, to form the necessary heat-transfer surface. It is held together by the central shaft in a way that the liquid flows spinning inside the cylinder at a calculated velocity, enhancing firstly the contact between metal and product and secondly producing the proper mixing efficiency.
  • the pitch of this auger is established by flow conditions, the same way as the distance between the disks in the previous embodiment, to give the necessary flow and mixing for the liquid.
  • a third embodiment of the invention comprises a core assembly within an insulating cylinder, which core assembly consists of a number of circular disk-like plates held together by a centrally positioned tie-rod.
  • each circular disk has an open sector-shaped segment of preferably 90°.
  • the plates are placed on a central tie-rod with the open segments progressively displaced in their angular position such that the open segments of adjacent plates overlap each other to form a small slot through which the liquid can pass from one open segment to that of the adjacent plate.
  • the liquid performs a spiral movement through the stack of plates.
  • the core assembly is somewhat similar to the first embodiment.
  • Any number of disks are placed inside of an insulated cylinder.
  • the disks are of two different diameters, set alternately.
  • the disks with the greater diameter fill the whole cross section of the cylinder and are provided with proper gasketing against the cylinder wall.
  • the stack of disks is pressed together without any gap.
  • the flow path proceeds through holes near and through the outer edge of the bigger disks, which holes are placed alternately at preferably 180° displaced from each other.
  • the liquid enters at one end of the whole package, goes through the hole of the bigger disk, flows around the smaller disk, and goes through the hole of the next bigger disk displaced angularly with its hole 180° relative to the first disk. This zigzagging of the flow is the final path of the liquid.
  • the whole package is again tightened together by a central tie-rod to form a rigid body, easy to be placed in and taken out of the cylinder and to be disassembled.
  • an insulating cylinder is placed around the core assembly to avoid mechanical contact between coil and core assembly.
  • any insulating material between coil and core assembly is unnecessary if only provision is made for an insulating air gap between coil and core assembly or if an insulated conductor is used for the coil.
  • the fifth embodiment is of the type without an insulating cylinder.
  • This embodiment is somewhat similar to the fourth embodiment in that it comprises a series of disks held in sealing contact with one another by a central tie-rod which presses the disk together.
  • the core assembly thus forms a solid bloc, properly protected against corrosion, of any number of electrically conductive material of any thickness and any diameter.
  • the material may be magnetic or non-magnetic.
  • the centre of each disk has a hole through which a central tie-rod is being placed and properly tightened by nuts and washers on both ends.
  • the thickness of the disks is enough to machine on one face of each disk, one or more grooves possibly half the thickness of the disk itself.
  • On the bottom of each groove a hole is drilled of preferably the same diameter as the width of the groove.
  • the disks are placed on top of one another in a way that each hole is angularly displaced relative to the previous one.
  • a continuous channel is created for the flow of the liquid to be processed in a way that the liquid enters on one end and goes out the other end of the whole block. If there is two or more circular grooves on each disk there will be two or more parallel flow paths.
  • the very last disk does not have an outflow hole on the bottom of a groove, but instead a cross channel connecting the two circular grooves, positioned at different radii, without an outlet, the second set of grooves form a similar zigzagging path from the last disk back again to the first disk without a second opening.
  • the flow path is turned into a central hole extending through the stack of disks. The liquid thus finds its way to flow again for the whole length of the stack through the central hole and goes out on the outlet end of the stack.
  • the central tie-rod is not placed inside of a hole but of a pipe where the tie-rod leaves the space for the liquid to flow out on the bottom.
  • the disks will be designed for any even number of circular grooves in each disk. There will be only correspondingly more cross channels in the last and first disk to connect adjacent grooves.
  • the containers each have end flanges of stainless steel or other acceptable metal. Both ends are properly gasketed, whereby the liquid comes in through one inlet and flows out through a similar outlet on the other end of the processor.
  • This whole device can be then covered by proper casing which has no functional purpose, only to protect the electromagnetic coil around the cylinder.
  • the source of alternating current is an outside source which may be varied as to frequency, voltage and current intensity connected to the electromagnetic coil.
  • the processor can be placed horizontally or vertically, or at an angle if needed.
  • the core assembly is easy to extract from the magnetic coil to disassemble, clean and reassemble in an easy inexpensive and straight forward manner.
  • By spacing the independent metallic elements it is possible to create the proper flow cross section, and control the flow velocity of the product. This guarantees highly efficient heat transfer from the metal to the product and consistent mixing with less or no fouling. Such velocity is self-cleaning and hinders the deposition of fouling.
  • the invention avoids the necessity of all the pipings, insulation, pumping of the heating-medium (hot water, oil, steam). Thus it is easier and cheaper to manufacture and maintain.
  • FIG. 1 and 2 show a first embodiment of the invention.
  • 10 is an outside container of the processor which may be identical for the embodiments described hereafter as far as they comprise a separate outside container.
  • Container 10 is comprised of a hollow cylinder 12, on either end of which are mounted inlet end plate 14 and outlet end plate 16, respectively.
  • a circular inlet sealing groove 18 is cut into the inlet end plate 14 to mate with the one end portion of the hollow cylinder 12, and a circular outlet sealing groove 20 is cut in the interior portion of the outlet end plate 16 to mate with the other end portion of hollow cylinder 12.
  • Circular sealing gaskets 22 and 24 are positioned in the sealing grooves 18 and 20. Both gaskets are pressed against the end portions of cylinder 12.
  • An inlet tube 26 extends through inlet end plate 14, and an outlet tube 28 extends through-outlet end plate 16, thus allowing liquids to flow into, through, and out of the hollow cylinder 12.
  • Four container tie-rods 30 extend through the outer portions of inlet end plate 14 through outlet end plate 16 and are held in place by container nuts 36 which bear against container washers 34 positioned upon the container tie-rods 30.
  • electromagnetic coil 38 surrounds the outside of the hollow cylinder 12 and extends between the two end plates 14, 16.
  • the coil 38 comprises a number of hollow tube windings 40 arranged in one or more layers. The layers are preferably connected in series.
  • the coil may be cooled by feeding an cooling medium through the hollow tube windings 40 from the inlet 42 to the outlet 44.
  • the coil is connected to an alternating current source 46 and generates an alternating electromagnetic field when supplied with current.
  • a core assembly comprising a number of electromagnetic core heating elements.
  • the core assembly of heated elements is arranged on a hollow central shaft 50 which is made up of hollow spacer elements 52.
  • Any number of circular disks 54 having a central hole therethrough are positioned alternately between the hollow spacer elements 52.
  • Each circular disk 54 has a segment-shaped cut-out section 56 on the edge thereof. These disks are positioned sequentially between said hollow spacer elements 52 in a way that the cut-out sections are angularly displaced from disk to disk, by preferably 1800.
  • a tie-rod 60 extends through the hollow spacer elements 52 and the circular disk 54.
  • the tie-rod 60 has threaded end sections thereon upon which is positioned a washer 64 and a nut 66 on both ends, thus holding the disks 54 and the hollow spacer elements 52 firmly in position.
  • the circular disk 54 adjacent to the outlet end plate 16 has rods 68 welded thereto, which bear against outlet end plate 16 to prevent the heating element from moving toward the outlet end plate 16.
  • the cylinder 12 can be made of glass, ceramics, plastic, or other electrically insulating material.
  • Hollow spacer elements 52 may likewise consist of insulating material, but also may be made of metal such as stainless steel, iron, or iron alloy.
  • Inlet end plate 14 and outlet end plate 16 may be made of insulating material.
  • the liquid 69 to be heated and mixed is introduced into the cylinder 12 through inlet tube 26 and leaves hollow cylinder 12 through outlet tube 28 (see arrows).
  • the liquid 69 flows as indicated by the arrows alternately through the cut-out section 56 of each circular disk 54. These cut-out sections are alternately positioned to allow the liquid 69 to flow in a zigzag pattern.
  • the liquid 69 flows in contact with the heated circular disks 54 and spacer elements 52 and will thus be mixed and heated at the same time.
  • the heating and mixing can be controlled by the intensity of the alternating current in coil 38.
  • the length of the hollow spacer elements 52 may be shortened or lengthened to control the width of the path of the liquid 69 through the device.
  • the frequency, current and voltage of the source 46 may also be varied depending upon the specific conditions to produce a desirable heating of the liquid 69.
  • the velocity at which the liquid 69 travels through the device may be controlled by the pressure at which it is admitted in through the inlet tube 26 to generate a convenient turbulence for mixing.
  • the entire device may be easily disassembled and cleaned by removing the container nuts 36, extracting the container tie-rods 30 and thus removing the inlet end plate 14 and the outlet end plate 16.
  • the core assembly can then be extracted, disassembled and cleaned, by removing disk tie-rod nut 66. After cleaning, the assembly can easily be re-assembled.
  • Figures 3 and 4 show a second embodiment of the invention. It differs from the first embodiment by the modification of the core assembly, which is replaced by a helical shaped auger 74. All other elements of this embodiment are the same as in the first embodiment.
  • the helical shaped auger 74 is mounted on an auger shaft 72, which may be hollow with solid end portions and made of ceramics, plastic or other insulating and magnetically inert material.
  • the auger shaft 72 may also be made of metals, such as stainless steel or iron.
  • the helical shaped auger 78 which is made of stainless steel, iron or any other metal, extends the length of the auger shaft 72.
  • the helical shaped auger 74 is a spiral shaped member similar in shape to a drilling auger.
  • the auger shaft 72 has a tie-rod 60 extending therethrough with washers 64 and nuts 66 and a central hole similar to that shown in Figures 1 and 2.
  • this auger behaves much like the previously described processor of Figures 1 and 2.
  • the magnetic field of the coil 38 induces eddy currents in the helical shaped auger 74 and thus heats it up.
  • the liquid 69 is introduced as before through inlet tube 26 and flows along the spaces created by the helical shaped auger 74 ultimately leaving the device through outlet tube 28.
  • the spiralling motion of the liquid 69 (see arrows), which contacts all sides of the helical shaped auger 74, is both heated and mixed as it proceeds along its path.
  • the auger 74 is likewise provided with spacer rods 76 which prevent the auger 74 from being pressed against the end plate 16 by the flowing liquid 69. As before the device can be easily dissembled for cleaning and reassembled.
  • Figures 5, 6 and 7 show a third embodiment of the invention.
  • the core assembly comprises heating elements in the form of circular disks 78 with an angular wedge shaped cut-out (sector) 80 and a central hole 77.
  • the disks 78 are secured adjacent to one another by a tie-rod 60 extending through the central holes 77.
  • the angle of the wedge shaped cut-out is 90°; however, there may be other angles.
  • a second cut is made parallel to each of the two radial edges of the angular wedge, about half a thickness of disk 78. These second cuts enlarge said 90° wedge angle and thus create a disk slot 82 of approximately the thickness of the disk between each pair of adjacent disks 78 (see Figures 6 and 7).
  • the disks 78 are positioned so that the wedge cut 80 is angularly displaced (rotated) by 90° with each succeeding disk 78.
  • the disk slot 82 leaves a passage between each adjacent disks through which liquid can flow. Liquid introduced through the disk slot 82 between the first pair of disks will thus flow in spiral fashion through the stack of disks by passing from each slot 82 to the to next as may be seen by the liquid flow arrows in Figures 5 and 7.
  • Spacer rods 76 extend from the end disk 78 to the outlet plate 52. The liquid will thus contact each disk 78 and be heated and mixed.
  • Figures 8, 9 and 10 show a fourth embodiment of the invention.
  • the core assembly comprised a series of large diameter heating disks 86 and small diameter heating disks 88 alternately mounted and pressed together by means of a central hole 77 and a tie-rod 60 with nuts 66 and washers 64 on its ends.
  • the large diameter disk 86 with a gasket on its periphery to seal against cylinder 12 has a flow hole 90 therethrough located beyond the outer edge of the small diameter disk 88.
  • Flow holes 90 are positioned alternately 180° from the flow hole of the adjacent large diameter disk 86. Other angles may be used however.
  • spacer rods 76 extend from the end positioned large diameter disk 86 to outlet end plate 16.
  • liquid entering the first flow hole 90 will flow through the annular space between small diameter disk 88 and hollow cylinder 12 and through the flow hole 90 of the next large diameter disk 86 and so on. See flow arrows in Figures 8 and 10.
  • the liquid contacts a large area of metal and is heated and mixed.
  • the heated and mixed liquid then passes through outlet tube 28 and out of the device.
  • FIG. 11 a fifth embodiment of the invention is depicted in Figures 11, 12, and 13.
  • the core assembly 100 is formed of a series of circular grooved disks 102 having a central hole 104 therethrough and circular concentric inner grooves 106, outer grooves 108 and gasket grooves 110 all on the same side. These grooved heating disks 102 are all pressed together.
  • An output tube 112 extends through the central hole 104 through an inlet end disk 114 where it abuts an inlet flange 117.
  • a tie-rod 116 with threaded end portions extends through the output tube 112, inlet end disk 114 and inlet flange 117. There it is screwed to an inlet end nut 118 which bears against flange 117.
  • Inlet flange 117 and inlet end nut 118 may be a single integral unit.
  • the opposite end portion of tie-rod 116 extends through the central hole 104 of a cross channel disk 132 at the outlet end portion of core 100 and through an outlet disk 122.
  • the tie-rod 116 is then screw-attached to an outlet nut 126, preferably formed as one integral part with outlet disk 122.
  • the tightening of outlet nut 126 and inlet nut 118 will compress all disks one upon the other, creating a rigid core 100 in which the inner grooves 106 and outer grooves 108 become liquid flow channels designed as inner channel 106 and outer channel 108.
  • Outer channels 108 are defined to form a first cycle, and inner channels 106 a second cycle to indicate the nature of liquid flow.
  • Each outer channel 108 has a first cycle hole 128 therethrough which leads to the outer channel 108 of the adjacent grooved disk 102.
  • the inner channel 106 of each grooved disk 102 has a second cycle hole 130 therethrough leading to the inner channel 106 of the adjacent grooved disk 102.
  • first cycle holes 128 and second cycle holes 130 are 180° apart.
  • the first cycle hole of each disk 102 is angularly displaced by preferably 180° from the first cycle hole of the adjacent disk 102.
  • the second cycle hole 130 of each disk is likewise displaced by preferably 1800 from the second cycle hole of the adjacent grooved disk 102,
  • a flow passage or channel is created whereby liquid can flow through the first cycle hole 128 into outer channel 108 and through outer channel 108 to the next first cycle hole 128 from whence it passes into the outer channel 108 of the adjacent grooved disk and so on.
  • the cross channel disk 132 is positioned on the outlet end of the stack of groove disks 102 adjacent to the outlet disk 122.
  • Cross channel disk 132 has a central hole 104 therethrough and outer channel 108 and inner channel 106 therein.
  • a cross channel 134 in cross channel disk 132 connects outer channel 108 with inner channel 106 of the adjacent disk 102. Liquid will flow from first cycle outer channel 108 to second cycle inner channel 106. Here the liquid will alternately flow through second cycle holes 130 and through inner channel 106 to a second cycle hole 130 in the adjacent grooved disk 102. As may be seen, first cycle liquid will flow in an alternating manner from outer channel 108 through cross channel 134 to inner channel 106.
  • a circular gasket 136 is positioned in circular gasket groove 110 in the grooved disks 102 and in cross channel disk 132, thus preventing fluid leakage when the disks are pressed together.
  • an inlet disk 114 is positioned adjacent to and facing the end of the first grooved disk 102.
  • Inlet disk 114 has an inlet hole 138 therethrough which communicates with outer channel 108 of the adjacent grooved disk 102.
  • An inlet cross channel 140 is cut in inlet disk 114 in communication with the inner channel 106 of the adjacent grooved disk 102.
  • Inlet cross channel 140 extends to an output hole 142 through output tube 112. Fluid proceeding through inner channel 106 will flow into output tube 112 and toward outlet disk 122.
  • the outlet disk 122 has a circular outlet recess 143 cut therein and two outlet holes 144 extending therethrough to the outside. Outlet disk 122 is pressed against adjacent cross channel disk 132. Liquid flowing through output tube 112 will enter outlet recess 143 and flow out of the outlet holes 144. It should be noted that outlet disk 122 has a concentrically positioned circular gasket groove 146 with an exit gasket 148 therein, to achieve safe sealing.
  • Core assembly 100 may be positioned inside of hollow cylinder 12 as described with the other embodiments.
  • the disks of the core assembly 100 are heated by eddy currents generated by the magnetic field of coil 38.
  • the liquid to be heated and mixed then is introduced under pressure through inlet hole 138 into outer channel 108 where it proceeds in an alternating fashion to cross channel 134 and thence to inner channel 106. It then proceeds in a similar alternating fashion through inner channel 106 to inlet cross channel 140 and thence through an output hole 142 into output tube 112.
  • the liquid then proceeds within output tube 112 to outlet recess 143 and out through outlet holes 144.
  • Figures 12 and 13 illustrate the flow pattern of the moving liquid by appropriate arrows.
  • the liquid is thus exposed to a large area of contact with grooved disks 102 and heated thereby.
  • the fluid is thoroughly mixed by its alternating path through the grooved disk 102.
  • the length of the path of the fluid through core assembly 100 may be varied by the number of grooved disks 102.
  • Core assembly 100 has great efficiency in heating and mixing liquid passing therethrough.
  • the velocity of the liquid entering core 100 and the time it remains therein may be varied by varying the liquid pressure at the inlet hole 138.
  • the temperature of the entire core 100 may be varied.
  • Figure 12 and in more detail Figure 14 represent a modification of core assembly 100 whereby it may operate independently of an outside container 10.
  • inlet end section 164 is positioned on the inlet end portion of core 100.
  • Inlet end section 164 is comprised of a hollow inlet cylinder 172 which abuts inlet disk 114.
  • a square inlet plate 154 is positioned on the other end portion of hollow inlet cylinder 172.
  • An inlet tube 188 extends through inlet plate 154.
  • a similar outlet end section 166 is positioned at the outlet end of the core assembly 100.
  • a hollow outlet cylinder 173 is positioned abutting cross channel disk 132.
  • a square outlet plate 156 is positioned abutting the other end portion of hollow outlet cylinder 173.
  • tie-rods 158 extend through the corner position of inlet plate 154 and outlet plate 156. These tie-rods 158 extend longitudinally beside core 100. Tie-rod nuts 160 are screwed upon the threaded end portions of the tie-rods 158. When tightened, tie-rod nuts 160 press outlet plate 156 and inlet plate 154 together, compressing the core 100 into a rigid unit.
  • hollow inlet cylinder 172 extends within a circular inlet cylinder groove 174 in inlet disk 114. Likewise, the other end portion of hollow inlet cylinder 172 extends into a circular groove 182 in inlet plate 154. Gaskets 176 provide safe sealing. Likewise the outlet side is provided with corresponding grooves 178 and 185 in plate 156 and disk 132, respectively, to accommodate gaskets 180 for safe sealing.
  • a hollow electromagnetic coil 194 is longitudinally wrapped about core 100.
  • the end portions of the coil 194 are attached to electrical terminals 196 which are connected to an alternating current source.
  • a cooling fluid may be forced through the hollow turns of coil 194 during operation.
  • coil 194 When coil 194 is energized, the elements of the core assembly 100 are heated by eddy currents.
  • liquid is introduced through inlet tube 188 where it flows into first cycle hole 138 and thence through core 100 in the manner previously described. It then flows into outlet flow section 166 and out of outlet tube 190.
  • core 100 of this embodiment according to the invention may operate independently as a self-contained unit.
  • each disk is then provided with only one or more preferably concentric grooves, the grooves of all disks on the same radius forming one alternately circulating flow channel with a resulting direction in the axial direction of the stack of disks.
  • corresponding cross channel disks are to be arranged on either side of the stack of disks to connect one axial cycle channel with the next.
  • the flow of liquid may meander several times to and fro in the axial direction of the stack of disks.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Induction Heating (AREA)
EP93110683A 1992-07-13 1993-07-05 Elektromagnetischer Behandlungsvorrichtung zum Aufheizen und Mischen von Flüssigkeiten Withdrawn EP0579073A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US91224192A 1992-07-13 1992-07-13
US912241 1992-07-13
US3376093A 1993-05-04 1993-05-04
US33760 1993-05-04

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EP0579073A1 true EP0579073A1 (de) 1994-01-19

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Cited By (10)

* Cited by examiner, † Cited by third party
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DE4415389A1 (de) * 1994-05-02 1995-11-09 Manfred Dr Ing Rudolph Vorrichtung zur induktiven Durchlauferwärmung eines elektrisch leitfähigen, pumpfähigen Mediums
GB2289830A (en) * 1993-11-08 1995-11-29 Lin Hsiao Chih Instant induction heating liquid heaters
WO1996008942A1 (de) * 1994-09-16 1996-03-21 Vem-Elektroantriebe Gmbh Wärmegenerator
WO2000039466A1 (de) 1998-12-23 2000-07-06 Tox Pressotechnik Gmbh & Co. Kg Dichtung für hydropneumatischen druckübersetzer
EP1351016A3 (de) * 2002-04-02 2004-06-02 Masami Nomura Erzeuger von überhitztem Dampf
ES2272193A1 (es) * 2006-06-16 2007-04-16 Jose Ignacio Vildosola Erdociain Sistema y aparato para el calentamiento de fluidos por induccion.
WO2015009178A3 (en) * 2013-07-18 2015-04-30 Ajh047 Sp. Z.O.O. Process for applying metal microparticles to polymeric material, device for performing the process, polymeric material with metal microparticles and use of the polymeric material
CN105056811A (zh) * 2015-09-06 2015-11-18 陕西延长石油(集团)有限责任公司研究院 电磁加热聚合物搅拌装置
US9883552B2 (en) 2010-06-16 2018-01-30 Rotaheat Limited Heat generator
US10425998B2 (en) 2013-08-22 2019-09-24 Rotaheat Limited Heat generator

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DE3314824A1 (de) * 1983-04-23 1984-10-31 Otto Junker Gmbh, 5107 Simmerath Vorrichtung zur erhitzung des innenraumes von behaeltern
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Publication number Priority date Publication date Assignee Title
GB479535A (en) * 1936-08-28 1938-02-08 Thomas Hamilton Adams Improvements in generating heat electrically
DE1959110A1 (de) * 1969-11-25 1971-06-03 Guenter Fahrion Homogenisatoren fuer nichthomogene Zwei- oder Mehrkomponemen-Stroemungen und -Mischungen von Gasen oder Fluessigkeiten
DE2634204A1 (de) * 1976-07-30 1978-02-02 Kali Chemie Ag Waermetauscher
DE2745135A1 (de) * 1977-10-07 1979-04-12 Kali Chemie Ag Induktionswaermetauscher
US4370062A (en) * 1980-02-19 1983-01-25 Moody Warren E Dispensing gun for two-part adhesives
DE3314824A1 (de) * 1983-04-23 1984-10-31 Otto Junker Gmbh, 5107 Simmerath Vorrichtung zur erhitzung des innenraumes von behaeltern
US4560284A (en) * 1983-11-21 1985-12-24 Chen Hwang C Continuous type of fluid mixing and feeding device
US4854721A (en) * 1986-03-25 1989-08-08 Equip-Mark, Inc. Blending and dispensing beverages

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2289830A (en) * 1993-11-08 1995-11-29 Lin Hsiao Chih Instant induction heating liquid heaters
DE4415389A1 (de) * 1994-05-02 1995-11-09 Manfred Dr Ing Rudolph Vorrichtung zur induktiven Durchlauferwärmung eines elektrisch leitfähigen, pumpfähigen Mediums
WO1996008942A1 (de) * 1994-09-16 1996-03-21 Vem-Elektroantriebe Gmbh Wärmegenerator
WO2000039466A1 (de) 1998-12-23 2000-07-06 Tox Pressotechnik Gmbh & Co. Kg Dichtung für hydropneumatischen druckübersetzer
EP1351016A3 (de) * 2002-04-02 2004-06-02 Masami Nomura Erzeuger von überhitztem Dampf
US7115845B2 (en) 2002-04-02 2006-10-03 Masami Nomura Superheated steam generator
ES2272193A1 (es) * 2006-06-16 2007-04-16 Jose Ignacio Vildosola Erdociain Sistema y aparato para el calentamiento de fluidos por induccion.
US9883552B2 (en) 2010-06-16 2018-01-30 Rotaheat Limited Heat generator
WO2015009178A3 (en) * 2013-07-18 2015-04-30 Ajh047 Sp. Z.O.O. Process for applying metal microparticles to polymeric material, device for performing the process, polymeric material with metal microparticles and use of the polymeric material
US10425998B2 (en) 2013-08-22 2019-09-24 Rotaheat Limited Heat generator
CN105056811A (zh) * 2015-09-06 2015-11-18 陕西延长石油(集团)有限责任公司研究院 电磁加热聚合物搅拌装置

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