EP0094876A1 - Echangeur récupérateur de chaleur à effet convecto-radiatif - Google Patents

Echangeur récupérateur de chaleur à effet convecto-radiatif Download PDF

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Publication number
EP0094876A1
EP0094876A1 EP83400955A EP83400955A EP0094876A1 EP 0094876 A1 EP0094876 A1 EP 0094876A1 EP 83400955 A EP83400955 A EP 83400955A EP 83400955 A EP83400955 A EP 83400955A EP 0094876 A1 EP0094876 A1 EP 0094876A1
Authority
EP
European Patent Office
Prior art keywords
exchange
zone
gas
exchanger according
module
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.)
Withdrawn
Application number
EP83400955A
Other languages
German (de)
English (en)
French (fr)
Inventor
Serge Galant
Didier Grouset
Ginés Martinez
Jean-Charles M. J. Mulet
Denis Demeure de Beyris Rebuffat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bertin Technologies SAS
Original Assignee
Bertin et Cie SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bertin et Cie SA filed Critical Bertin et Cie SA
Publication of EP0094876A1 publication Critical patent/EP0094876A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • 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
    • F28F13/02—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by influencing fluid boundary
    • 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
    • F28F21/04—Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone

Definitions

  • the invention relates to a convective radiative heat exchanger, an exchange gas passing through compartments arranged one behind the other, each compartment being divided according to its height into zones, a zone receiving the exchange gas, comprising a wall, having openings, separating it from another zone comprising an exchange surface disposed opposite the wall, the gas passing from one zone to another and from one compartment to another.
  • Heat transfer gas exchangers generally have a low efficiency, due to the fact that the gas flows parallel to the hot surface and that a very small part of the gas flow comes into contact with the exchange surface.
  • Hot gas flowing against the current and from the other side tee of the exchange surface also meets a partition which deflects it towards this surface, the change in direction of the gas flows, relative to the exchange surface, eliminates the layer at low speed and allows better heat exchange.
  • the exchanger is formed by a tube of rectangular section, one wall of which constitutes the exchange surface.
  • the length of the tube is divided into compartments.
  • Each compartment is divided into two zones by an inclined partition facing the exchange surface, and defining in the direction of circulation of the exchange gas, a first zone of decreasing height.
  • the second zone communicates with the first by a longitudinal slot in the partition, a slot whose edges are extended by blanks, directed towards the exchange surface.
  • jets or vortices of fluid improves thermal transfer by convection, but in high temperature exchangers, a non-negligible part of the heat is transferred by radiation.
  • the exchange by radiation is particularly reduced and the efficiency of the exchanger is all the more limited.
  • the radiation contributes to the heating of the external walls of the cooling circuit which exchange with the ambient environment, without allowing recovery and therefore valid cooling.
  • the exchanger according to the invention not only improves heat exchange by convection, thanks to the impact of the jets, but also by radiation.
  • the thermal radiation coming from the exchange surface is stopped by one (or more) radiative exchange wall, parallel to the exchange wall separating the hot gases from the cold gases.
  • the two exchange walls determine a channel in which the cold or hot gas circulates, against the current. This technology is particularly well suited for making a ceramic material.
  • the heat recovery exchanger with convecto-radiative effect comprises two modules 1 and 2, arranged one behind re the other.
  • Each module comprises two compartments ( Figure 2), 3, 4 arranged one above the other and separated by an exchange wall 5.
  • the compartments receive one hot gas and the other cold gas , which come into contact with the surfaces of the exchange wall where they undergo by convective exchange a variation of their enthalpy.
  • the compartments have a truncated prism shape and are symmetrical with respect to the exchange wall 5.
  • Each compartment is divided into three zones parallel to the surface of the exchange wall: a gas inlet zone 6, a zone distribution 7 and an exchange zone 8.
  • the gas inlet zone is furthest from the exchange surface 5, and the gas inlet pipe 9 is disposed near the base of the prism.
  • the gas outlet 10 is provided at the truncated top of the prism, at the end of the exchange zone 8.
  • the compartment 3 of the module 1 is in series with the compartment 11 of the module 2.
  • the compartment 12, symmetrical of the compartment 11 with respect to the exchange wall 50 of the module 2, is in series with compartment 4 of module 1.
  • Compartment 12 also includes an inlet pipe 9 for gas.
  • the gas inlet area 6 is separated from the distribution area 7 by a perforated screen 14, made up of spaced blades.
  • the distribution zone 7 is separated from the exchange zone 8 by a radiative exchange plate 15, comprising circular or elongated openings to form gas jets directed towards the exchange plate 5.
  • the openings of the plate 15 are slots directed in the direction of flow of the gas and are arranged in two rows 16, 17, the slots of a row being offset by a half distance this compared to the slots in the other row.
  • the openings are directed perpendicularly to the slots of the radiative exchange plate 15.
  • This arrangement makes it possible to avoid preferential thermal leaks and to make the coefficient of homogeneous exchange.
  • the length of the blades being relatively large with respect to the width, they are held at their middle part by a blade support 19, resting at least in part on the radiative exchange plate 15 (FIG. 5).
  • the triangular shaped support has parallel to one of its sides, elongated openings 19 through which the blades pass.
  • a module 1 or 2 consists of two lateral flanges 20 ( Figure 4): a right flange and a left flange.
  • the flanges are in the shape of a parallelogram and carry grooves or housings in their thickness, intended to hold the plates and screens.
  • a central groove 21, approximately diagonal, is provided to receive the ends of the convective exchange plate 5.
  • Parallel to at least one small side of the parallelogram is provided a groove 24 into which the grooves 22 and 23 open.
  • the groove 24 itself opens into the groove 21 of the convective exchange plate 5, forming the separation between the compartments in which the hot and cold gases circulate.
  • the groove 24 is intended to hold the end partition 25.
  • a groove or a recess 26 is provided parallel to the edges of long sides of the parallelogram and is intended to receive the upper and lower partitions 27 and 28, the partition 27 possibly carrying the gas inlet 9.
  • the grooves provided on the short sides of the parallelogram differ from side to side.
  • the housing or groove receiving the partition 29, separating the compartment 4 of the module 1 from the neighboring compartment 30 of the module 2, is formed by half on each edge, during the symmetrical assembly of the modules 1 and 2.
  • the partitions 25 and 29 carry longitudinal grooves to hold the plates 5 and 15 and the screen 14.
  • an assembly stud 31 is provided which is placed in a recess 32 and thus extends the grooves 21 and 22 of the flange of the first module.
  • the assembly of a two-module exchanger, as described in the invention, is carried out in a simple manner.
  • the perforated screen 14 is assembled by introducing the bars into the openings 19 of the support 18, then by sliding the ends of the bars into the housings 23 of the flanges.
  • the flanges, constituting the other side of the exchanger, are placed on the ends of the plates.
  • the exchanger is closed by fitting the walls 27 and 28. These walls are formed of standardized elements allowing an easy modification of the gas inlets.
  • the set of two modules forming the exchanger is surrounded by a thermal insulator 33 (FIG. 1), and the whole with a metal casing 34.
  • the elements constituting the modules of the exchanger are formed from a ceramic material, having good thermal conductivity and resistant well to thermal shock, such as for example silicon carbide, silicon nitride, mullite, stabilized zirconia, cordierite, etc.
  • the cold gas enters via the inlet pipe 90 in the lower compartment of the module 2 and follows a path similar to that of the hot gas but against the current, and it leaves the module 1, warmed, by the outlet 36.
  • the manufacture of the exchanger in modular form and with standardized elements allows simple extension of the elements by stacking and coupling the inputs and outputs of the various modules.
  • the characteristics of a module suitable for recovery on a metallurgical furnace are provided below to preheat the combustion air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP83400955A 1982-05-14 1983-05-11 Echangeur récupérateur de chaleur à effet convecto-radiatif Withdrawn EP0094876A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8208413 1982-05-14
FR8208413A FR2526930A1 (fr) 1982-05-14 1982-05-14 Echangeur recuperateur de chaleur a effet convecto-radiatif en materiau ceramique

Publications (1)

Publication Number Publication Date
EP0094876A1 true EP0094876A1 (fr) 1983-11-23

Family

ID=9274033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400955A Withdrawn EP0094876A1 (fr) 1982-05-14 1983-05-11 Echangeur récupérateur de chaleur à effet convecto-radiatif

Country Status (3)

Country Link
EP (1) EP0094876A1 (enrdf_load_stackoverflow)
JP (1) JPS5941790A (enrdf_load_stackoverflow)
FR (1) FR2526930A1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007110196A1 (de) * 2006-03-23 2007-10-04 Esk Ceramics Gmbh & Co. Kg Plattenwärmetauscher, verfahren zu dessen herstellung und dessen verwendung
WO2012076449A1 (de) 2010-12-06 2012-06-14 Basf Se Verfahren zur herstellung von aromatischen aminen
US8981155B2 (en) 2010-12-06 2015-03-17 Basf Se Process for preparing aromatic amines

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1095335A (enrdf_load_stackoverflow) * 1900-01-01
FR614851A (fr) * 1926-04-21 1926-12-24 Procédé pour élever la capacité des appareils et machines de transmission de chaleur
FR1160115A (fr) * 1956-10-26 1958-07-08 Bertin & Cie Perfectionnements aux échangeurs thermiques
FR1353902A (fr) * 1963-04-18 1964-02-28 Veitscher Magnesitwerke Ag Briques de carneaux réfractaires pour récupérateurs céramiques et récupérateur construit avec ces briques
US3450199A (en) * 1967-07-10 1969-06-17 Continental Aviat & Eng Corp Heat exchanger
FR2113897A1 (enrdf_load_stackoverflow) * 1970-11-10 1972-06-30 Lage James
US3788393A (en) * 1972-05-01 1974-01-29 Us Navy Heat exchange system
FR2414988A1 (fr) * 1978-01-18 1979-08-17 Ceraver Procede de fabrication d'un element d'echange indirect de chaleur en matiere ceramique, et element obtenu par ce procede

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1095335A (enrdf_load_stackoverflow) * 1900-01-01
FR614851A (fr) * 1926-04-21 1926-12-24 Procédé pour élever la capacité des appareils et machines de transmission de chaleur
FR1160115A (fr) * 1956-10-26 1958-07-08 Bertin & Cie Perfectionnements aux échangeurs thermiques
FR1353902A (fr) * 1963-04-18 1964-02-28 Veitscher Magnesitwerke Ag Briques de carneaux réfractaires pour récupérateurs céramiques et récupérateur construit avec ces briques
US3450199A (en) * 1967-07-10 1969-06-17 Continental Aviat & Eng Corp Heat exchanger
FR2113897A1 (enrdf_load_stackoverflow) * 1970-11-10 1972-06-30 Lage James
US3788393A (en) * 1972-05-01 1974-01-29 Us Navy Heat exchange system
FR2414988A1 (fr) * 1978-01-18 1979-08-17 Ceraver Procede de fabrication d'un element d'echange indirect de chaleur en matiere ceramique, et element obtenu par ce procede

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007110196A1 (de) * 2006-03-23 2007-10-04 Esk Ceramics Gmbh & Co. Kg Plattenwärmetauscher, verfahren zu dessen herstellung und dessen verwendung
US8967238B2 (en) 2006-03-23 2015-03-03 3M Innovative Properties Company Plate heat exchanger, method for its production, and its use
WO2012076449A1 (de) 2010-12-06 2012-06-14 Basf Se Verfahren zur herstellung von aromatischen aminen
US8981155B2 (en) 2010-12-06 2015-03-17 Basf Se Process for preparing aromatic amines

Also Published As

Publication number Publication date
FR2526930A1 (fr) 1983-11-18
FR2526930B1 (enrdf_load_stackoverflow) 1984-12-14
JPS5941790A (ja) 1984-03-08

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

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AK Designated contracting states

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

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

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18D Application deemed to be withdrawn

Effective date: 19840924

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MARTINEZ, GINES

Inventor name: MULET, JEAN-CHARLES M. J.

Inventor name: GALANT, SERGE

Inventor name: GROUSET, DIDIER

Inventor name: REBUFFAT, DENISDEMEURE DE BEYRIS