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Patent US6331072 - Continuous, chaotic convection mixer, heat exchanger and reactor - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsContinuous, chaotic convection mixer, convection heat exchanger and convection reactor The invention relates to a device (1), in particular for mixing, for heat exchange or for carrying out reactions, having one or more through-flow elements (2) which have a center line (3) in the direction of flow,...http://www.google.com/patents/US6331072?utm_source=gb-gplus-sharePatent US6331072 - Continuous, chaotic convection mixer, heat exchanger and reactorAdvanced Patent SearchPublication numberUS6331072 B1Publication typeGrantApplication numberUS 09/463,348PCT numberPCT/EP1998/004607Publication dateDec 18, 2001Filing dateJul 22, 1998Priority dateJul 24, 1997Fee statusLapsedAlso published asCN1272804A, EP0996498A1, EP0996498B1, WO1999004892A1Publication number09463348, 463348, PCT/1998/4607, PCT/EP/1998/004607, PCT/EP/1998/04607, PCT/EP/98/004607, PCT/EP/98/04607, PCT/EP1998/004607, PCT/EP1998/04607, PCT/EP1998004607, PCT/EP199804607, PCT/EP98/004607, PCT/EP98/04607, PCT/EP98004607, PCT/EP9804607, US 6331072 B1, US 6331072B1, US-B1-6331072, US6331072 B1, US6331072B1InventorsWilfried Schierholz, G�tz Lauschke, Stefan Ott, Ulrich Schmidt, Peter HeinOriginal AssigneeAxiva GmbhExport CitationBiBTeX, EndNote, RefManPatent Citations (15), Referenced by (11), Classifications (23), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetContinuous, chaotic convection mixer, heat exchanger and reactorUS 6331072 B1Abstract Continuous, chaotic convection mixer, convection heat exchanger and convection reactor
The invention relates to a device (1), in particular for mixing, for heat exchange or for carrying out reactions, having one or more through-flow elements (2) which have a center line (3) in the direction of flow, wherein the element(s) (2) is/are at least partially shaped or arranged such that the curve (9) formed by the center line(s) (3) approximately satisfies the following parametric representation: ϑ  ( t ) = ( ( - 1 ) [ t ]  a  ( t )  ( cos  ( 2  π   t ) - 1 ) c  ( t )  t a  ( t )  sin  ( 2  π   t ) ) the parameters and constants having the following meaning:
What is claimed is: 1. A device (1), in particular for mixing, for heat exchange or for carrying out reactions, having one or more through-flow elements (2) which have a center line (3) in the direction of flow, wherein the through low element(s) (2) is/are at least partially shaped or arranged such that the curve (9) formed by the center line(s) (3) approximately satisfies the following parametric representation: ϑ  ( t ) = ( ( - 1 ) [ t ]  a  ( t )  ( cos  ( 2  π   t ) - 1 ) c  ( t )  t a  ( t )  sin  ( 2  π   t ) ) the parameters and constants having the following meaning:
∂(t) position vector in a Cartesian coordinate system (8), t parameter along the curve (9), −∞≦t≦+∞, [t] integral fraction of t, a(t) a radius of curvature (10), where 0<|a(t)|<∞, c(t) a spacing parameter, where 0<|c(t)|<∞. 2. The device as claimed in claim 1, wherein the curve (9) completely satisfies the parametric representation for one or more through-flow elements (2), t running from 0 to 1.
10. A method for producing a device (1) as claimed in claim 1, in which a tube (2) is bent around [t] cylindrical molded parts (23) which are arranged alternately, to form two mutually parallel columns (29, 32), a guide groove (31) with the radius of curvature (10) a(t) and a lead �* c(t) being recessed into each molded part (23) on the circumference, and the tube being bent around the first molded part (23) of the first column and subsequently around the first molded part (23) of the second column, and subsequently the further molded parts (23) being alternately plugged onto the first and second columns, and the tube being bent around said further molded parts (23).
14. A device (22) for carrying out the method as claimed in claim 10, having a base plate (30) on which the at least two cylindrical molded parts (23) are arranged parallel to one another at a spacing (b) to form the two columns (29,32), the at least two cylindrical molded parts (23) having on the circumference a guide groove (31) with a radius of curvature (10) a(t) and a lead of �* c(t) individually to form the columns (29, 32).
BACKGROUND OF THE INVENTION The invention relates to a device, in particular for mixing, for heat exchange or for carrying out reactions, having one or more through-flow elements which have a center line in the direction of flow. Devices of the said type are known, specifically as continuous, chaotic convection mixers or convection heat exchangers or convection reactors for Newton and non-Newton fluids.
SUMMARY OF THE INVENTION It was therefore the object of the invention to find a device of the type mentioned at the beginning which requires no built-in components and can be built simply and compactly. Furthermore, the aim is to be able to achieve a good mixing and heat exchanging effect�without the disadvantages discussed above�over a wide range of viscosity and volumetric flow.
This object is achieved according to the invention by means of a device of the type mentioned at the beginning, wherein the through-flow element(s) is/are at least partially shaped or arranged such that the curve formed by the center line(s) approximately satisfies the following parametric representation: ϑ  ( t ) = ( ( - 1 ) [ t ]  a  ( t )  ( cos  ( 2  π   t ) - 1 ) c  ( t )  t a  ( t )  sin  ( 2  π   t ) ) the parameters and constants having the following meaning:
The subject matter of the invention is thus a device, in particular for mixing, for heat exchange, or for carrying out reactions, having one or more through-flow elements which have a center line in the direction of flow, wherein the through-flow element(s) is/are at least partially shaped or arranged such that the curve formed by the center line(s) approximately satisfies the following parametric representation: ϑ  ( t ) = ( ( - 1 ) [ t ]  a  ( t )  ( cos  ( 2  π   t ) - 1 ) c  ( t )  t a  ( t )  sin  ( 2  π   t ) ) the parameters and constants having the following meaning:
In this case, a parameter range t for a through-flow element defines a so-called loop of 360� from one whole number to the next whole number, and a double loop to the next whole number but one.
The multiples of the diameter of the tube specified in German DIN 2605 T1 are preferably used as radii of curvature a(t) of the center line. A typical design consists, for example, of a tube with the outside diameter D=40 mm. Design 5 of the standard uses a bending radius of 100 mm. A lead (spacing parameters c(t)) of 100 mm per loop of 360� then proves to be advantageous. The number of loops is determined by the mixing task. A typical number of loops is 4 to 8. The wall thicknesses d are usually in the range from 0.5 to a few mm, in the case of extreme pressures up to 10 mm and more. In particular embodiments, the or each through-flow element has an outside diameter D in the range from 1 to 200 mm, preferably 5 to 100 mm, particularly preferably 10 to 50 mm, and the radius of curvature a(t) is selected from the range from 1*D to 7*D, preferably 2*D to 5*D. The spacing parameter c(t) is advantageously selected from the range from −20*D to +20*D, preferably −10*D to +10*D, particularly preferably from −5*D to +5*D, it being the case that it is always ≠0.
BRIEF DESCRIPTION OF THE DRAWINGS Novel features and advantages of the present invention in addition to those mentioned above will become apparent to persons of ordinary skill in the art from a reading of the following detailed description in conjunction with accompanying drawings wherein similar reference characters refer to similar parts and in which
DETAILED DESCRIPTION OF THE INVENTION The device according to the invention is further explained below with the aid of the exemplary embodiments represented perspectively in FIGS. 1, 2, 5, 6. FIG. 3 shows the result of a numerical experiment, and FIG. 4 a detail from FIG. 2 in cross section. There is no intention to limit the invention in any way, in particular to these embodiments.
inside radius R = 1 mm (R = (D − 2*d)/2) FIG. 5
−5*R
inside radius R = 20 mm; the loops 6b and 6c are connected by a straight element (tube 15). FIG. 6
inside radius R = 20 mm; the loops 6b and 6c are connected by an element (tube 18) curved in the shape of an S. The object of the invention is, furthermore, a method for producing a device according to the invention in which a tube is bent around [t] cylindrical molded parts which are arranged alternately, to form two mutually parallel columns, a guide groove with the radius of curvature a(t) and a lead �* c(t) being recessed into each molded part on the circumference, and the tube being bent around the first molded part of the first column and subsequently around the first molded part of the second column, and subsequently the further molded parts being alternately plugged onto the first and second columns, and the tube being bent around said further molded parts.
The object of the invention is, furthermore, a device for carrying out said method, having a base plate on which at least two cylindrical molded parts are arranged parallel to one another at a spacing (b) to form two columns, the at least two cylindrical molded parts having on the circumference a guide groove with a radius of curvature a(t) and a lead of �* c(t) for bending the tube, and being able to be plugged together individually to form the columns.
In order to guide the flow in and around a double loop 6 a, 6 b of the device 1 according to the invention in accordance with claim 1�termed �chaotic mixer� or �CM� below�, it is advantageous to produce said device without joining techniques. For this purpose, a length of tube 2 is brought onto the length of the mixing path and suitably shaped in a modularly configured bending device 22.
The bending device 22 comprises, inter alia, several preferably cylindrical molded parts 23 which can be plugged into one another and are arranged to form two columns 29, 32 extending parallel to one another. The number of molded parts 23 is equal to the number [t] of the loops 6 a, 6 b . . . The columns 29, 32 made from molded parts 23 are fastened to a base plate 30 at a spacing b from one another. A guide groove 31 which advantageously has at least a quarter of the tube cross section, preferably half the tube cross section, with a lead of �* c(t) is recessed, for example by milling or via a casting method, into the molded parts 23 on the circumference for the purpose of guiding the tube 2 during bending. The molded parts 23 can be plugged into one another and rotated with respect to one another, with the result that the transition of the guide groove 31 (milling) from a first molded part 23 on a first column 29 to the following one on the second column 32 is smooth. For this reason, the first molded part 23 of the second column 32 or its groove 31 is raised by the measure corresponding to the lead. The molded parts 23 have a complete groove 31 of at least 90�, preferably 180�, 360� being particularly preferred.
The advantages of this method according to the invention are to be seen essentially in that it is possible, by virtue of the modular design and the reciprocating way in which the molded parts are plugged on relative to a column, for tubes of �arbitrary� length to be bent in endless fashion to form chaotic mixers.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS2143287 *Feb 29, 1936Jan 10, 1939Earl B SmithHeat exchange coilUS2508247 *Sep 25, 1945May 16, 1950Research CorpHeat interchangerUS3335790 *Mar 18, 1966Aug 15, 1967Technoimpex Magyar Gepipari KuHeat exchanger with crossing helicoidal tubesUS3459377 *Nov 14, 1967Aug 5, 1969Hulse Kenneth I Van DerSprinkler hose constructionUS4275177 *Sep 10, 1979Jun 23, 1981Hoechst AktiengesellschaftProcess for continuous mass polymerization of alkenyl-aromatic compoundsUS4314606 *Sep 10, 1979Feb 9, 1982Hoechst AktiengesellschaftApparatus for a treatment of flowing media which causes heat exchange and mixingUS4347894 *Sep 3, 1980Sep 7, 1982Gerlach JuergenHeat exchangerUS4410281Mar 2, 1981Oct 18, 1983Ralph B. Carter CompanyMixing method and apparatus utilizing pipe elbowsUS4422773Aug 4, 1980Dec 27, 1983Technicon Instruments CorporationApparatus and method for the non-invasive mixing of a flowing fluid streamUS4599773Sep 20, 1982Jul 15, 1986Thermodynetics Inc.Method of forming a multiple coil heat exchangerUS6119769 *Aug 5, 1998Sep 19, 2000Visteon Global Technologies, Inc.Heat transfer deviceCA684285A *Apr 14, 1964Shell Oil CoHeat exchangerFR2763868A1 Title not availableGB426885A * Title not availableWO1994012270A1Nov 26, 1993Jun 9, 1994Univ NantesChaotic convection effect mixing exchanger* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6632014 *Dec 4, 2000Oct 14, 2003Yeda Research And Development Co., Ltd.Device and method for mixing substancesUS6896007 *Feb 10, 2003May 24, 2005Lmc Resources, Inc.Hydro-dynamic static mixing apparatus and method for use thereof in transporting, conditioning and separating oil sands and the likeUS6916113May 16, 2003Jul 12, 2005Agilent Technologies, Inc.Devices and methods for fluid mixingUS7041218Jun 9, 2003May 9, 2006Inflowsion, L.L.C.Static device and method of makingUS7045060Dec 5, 2003May 16, 2006Inflowsion, L.L.C.Apparatus and method for treating a liquidUS7264394Jun 10, 2002Sep 4, 2007Inflowsion L.L.C.Static device and method of makingUS7331705 *Dec 5, 2002Feb 19, 2008Inflowsion L.L.C.Static device and method of makingUS7475706 *May 30, 2007Jan 13, 2009Gm Global Technology Operations, Inc.Variable curvature tube and draw die thereforUS8485230 *Sep 10, 2012Jul 16, 2013Laor Consulting LlcGas delivery systemWO2007065211A1 *Dec 6, 2006Jun 14, 2007Acqua Internat Group IncModular chemical reactorWO2013020775A2 *Jul 13, 2012Feb 14, 2013Nestec S.A.Liquid-cryogen injection cooling devices and methods for using same* Cited by examinerClassifications U.S. Classification366/338, 138/177, 165/163International ClassificationF28D7/08, B01J19/24, F28D1/047, B01F5/06, B21D11/06, B01F5/00Cooperative ClassificationF28D2021/0052, B01F5/0646, B01F5/0647, F28F1/02, B21D11/06, B01J19/243, F28D7/08, B01F2215/0409European ClassificationF28F1/02, B01F5/06B3F2, B01F5/06B3F, B01J19/24D6, F28D7/08, B21D11/06Legal EventsDateCodeEventDescriptionFeb 14, 2006FPExpired due to failure to pay maintenance feeEffective date: 20051218Dec 19, 2005LAPSLapse for failure to pay maintenance feesJul 6, 2005REMIMaintenance fee reminder mailedApr 30, 2002CCCertificate of correctionFeb 12, 2002ASAssignmentOwner name: CELANESE VENTURES GMBH, GERMANYFree format text: CHANGE OF NAME;ASSIGNOR:AXIVA GMBH;REEL/FRAME:012598/0895Effective date: 20010522Owner name: SIEMENS AXIVA GMBH & CO. KG, GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CELANESE VENTURES GMBH;REEL/FRAME:012598/0914Effective date: 20011130Owner name: CELANESE VENTURES GMBH GEBAUDE K-801 INDUSTRIEPARKFree format text: CHANGE OF NAME;ASSIGNOR:AXIVA GMBH /AR;REEL/FRAME:012598/0895Owner name: SIEMENS AXIVA GMBH & CO. KG INDUSTRIEPARK HOECHSTFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CELANESE VENTURES GMBH /AR;REEL/FRAME:012598/0914Jun 8, 2000ASAssignmentOwner name: AXIVA GMBH, GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHIERHOLZ, WILFRIED;LAUSCHKE, GOTZ;OTT, STEFAN;AND OTHERS;REEL/FRAME:011033/0174;SIGNING DATES FROM 20000117 TO 20000523Owner name: AXIVA GMBH 65926 FRANKFURT GERMANYRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google