EP0025980B1 - Structure cylindrique alvéolaire monolithique statique à grande surface de contact - Google Patents

Structure cylindrique alvéolaire monolithique statique à grande surface de contact Download PDF

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Publication number
EP0025980B1
EP0025980B1 EP80105595A EP80105595A EP0025980B1 EP 0025980 B1 EP0025980 B1 EP 0025980B1 EP 80105595 A EP80105595 A EP 80105595A EP 80105595 A EP80105595 A EP 80105595A EP 0025980 B1 EP0025980 B1 EP 0025980B1
Authority
EP
European Patent Office
Prior art keywords
walls
structure according
channels
flux
radial
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.)
Expired
Application number
EP80105595A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0025980A1 (fr
Inventor
Jean Weber
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.)
Ceramiques et Composites SA
Original Assignee
Ceraver 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 Ceraver SA filed Critical Ceraver SA
Publication of EP0025980A1 publication Critical patent/EP0025980A1/fr
Application granted granted Critical
Publication of EP0025980B1 publication Critical patent/EP0025980B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/04—Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone
    • 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
    • F28D9/0012—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 the apparatus having an annular form
    • F28D9/0018—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 the apparatus having an annular form without any annular circulation of the heat exchange media
    • 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
    • F28D9/0081—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 the conduits for one heat-exchange medium being formed by a single plate-like element ; the conduits for one heat-exchange medium being integrated in one single plate-like element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F7/00—Elements not covered by group F28F1/00, F28F3/00 or F28F5/00
    • F28F7/02—Blocks traversed by passages for heat-exchange media
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1669—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having an annular shape; the conduits being assembled around a central distribution tube
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/355—Heat exchange having separate flow passage for two distinct fluids
    • Y10S165/395—Monolithic core having flow passages for two different fluids, e.g. one- piece ceramic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/905—Materials of manufacture

Definitions

  • the present invention relates to a static monolithic honeycomb cylindrical structure with a large contact surface of ceramic material, comprising a plurality of parallel channels defined by walls of the radial type and walls of the circular type, in which the channels form two groups each traversed by a fluid, the channels of one of the two groups being nested between the channels of the other group at an angular offset; the cross section of said structure comprising an annular zone composed of parallel channels and a central channel allowing the admission and / or the evacuation of fluids by selective communications with one or the other of the two groups of channels, said channel being closed by a watertight cap. It applies more particularly to heat exchangers at high temperature (of the order of 1200 ° C.), but is also suitable for other applications, such as gas treatment by catalysis, material exchange by diffusion at through a wall.
  • Document FR-A-2417074 discloses a cylindrical honeycomb structure of this kind.
  • the channel groups are offset radially there and the channels have an elongated section extending almost over the entire width of the annular zone in the radial direction. Therefore the extrusion nozzle for the manufacture of these structures is relatively difficult to make and fragile, its radial cores being fixed only at one of their ends. Consequently, such cylindrical structures can only be produced with a relatively large diameter.
  • the object of the present invention is to remedy this drawback, and to provide a cylindrical honeycomb structure of ceramic material which is easy to manufacture, using an extrusion nozzle of robust structure, which has a large surface area. exchange per unit of volume, and which may be of small diameter while having a large number of channels.
  • the cylindrical structure according to the invention is characterized in that at each end an end piece closes off the annular zone, and that the circular type walls of the two groups of parallel channels are inscribed in several cylinders coaxial with said structure.
  • the end of the honeycomb structure 1 according to a known technique is of rectangular section and rectangular mesh.
  • the end face 2 is selectively closed, according to an alternation of parallel rows: a first flow is admitted (arrow 3) by the face 2 in parallel channels such as 4, and is discharged by the other face (not visible) , while a second flow is admitted (arrow 5) through lateral orifices 6 in parallel channels such as 7 (the ends of which are therefore closed), and discharged laterally in the vicinity of the other face: the heat exchange takes place made by walls such as 8 separating two adjacent sets of channels.
  • a structure is obtained by extrusion, then drying and heat treatment when it is made of ceramic material, and the selective sealing of its end faces is generally carried out by dipping in a slip.
  • the channels are defined by walls 10 of radial type and walls 11 of circular type, said channels defining assemblies with essentially radiating arrangement traversed by the same flow.
  • the general organization is cylindrical, as well as for the section, the cylindrical external surface allowing a drying and a heat treatment much more uniform and offering a mechanical rigidity much higher compared to the structures with rectangular section, that as for the arrangement of the channels traversed by the same flow, whose essentially radiating arrangement, alternating according to an angular offset, is clearly illustrated.
  • the structure 9 is produced according to a hollow cylinder whose annular section, forming the useful cellular part, consists of sets of parallel channels, and whose central housing 12 is a channel allowing the admission and / or the evacuation of one of the two flows, said channel being closed in the vicinity of one of its ends (not visible here, but subsequently shown in the sections of Figures 4 and 5) to distribute the flow in the cells of said structure.
  • the structure comprises an end piece 13 making it possible to close simultaneously by its circular face 14 all the channels opening onto the annular end face, while leaving free access through an orifice 15 to the central channel 12.
  • This end piece made of any waterproof material (metallic or ceramic) will, as the case may be, be fixed by metallization of the ceramic at high temperature, or by bonding, or by brazing with glasses, depending on the operating temperature ranges.
  • the central recess in the annular arrangement, whether or not it is used for the routing of a flow, makes it possible to reduce the stresses due to dimensional variations of the structure, during its preparation and / or its use.
  • a group of channels communicates with the central channel, the end fitting simultaneously closing said channels, while the other group of channels, associated with the second flow, has lateral orifices 16 of admission and / or evacuation of the associated flow.
  • FIGS. 3A and 3B illustrate a complete structure, in the form of a cartridge, with a partition wall 17 fixed on the external surface to separate the two flows, and having respectively lateral inlet and outlet orifices d 'A flow 16A opening directly against the plane of the annular end faces, and 16B formed at a certain distance from said faces, which slightly complicates the machining in the latter case, but above all makes it possible to significantly increase the stiffness of the ends of the structure.
  • the openings are generally obtained by conventional machining of the partitions by means of grinding wheels, cutters or by any other process (ultrasound, laser, etc.); machining will preferably be carried out on the raw extruded ceramic element, while on a precooked (biscuit) or even baked element, it will be preferable to use ultrasound or diamond discs, the structure provided with its openings being able to be of any type. way subjected to cooking giving it the desired mechanical strength.
  • FIG. 4 illustrates well the paths taken by the two flows passing through the structure 9B, and shows the tight plug 18 closing the central channel 12: the lower part of the section concerns the circulation of the flow admitted by the central channel, in channels successive parallels, while the upper part concerns the circulation of the other flow which is admitted and expelled laterally by the orifices 16B.
  • the circular cutting of the orifices shows schematically a machining of the walls by a circular grinding wheel, but it goes without saying that one can choose any other type of cutting.
  • FIGS. 5A and 5B illustrate variants constituting a filter, for example for purifying the gases emitted by diesel engines, variants according to which the partitioning between the two groups of channels is such that the evacuated flow is a filtered part of the flow admitted by the central channel 12, after passing through said partitioning: a material presenting the desired porosity as a function of the particular gas to be purified will naturally be used to produce the structure;
  • FIG. 5A it is a total flow filter, in which case the structure 9C has no lateral orifice
  • FIG. 5B it is a derivative flow filter, in which case the structure 9'C has a lateral opening 16B for the derived portion.
  • FIGS. 6A to 6C represent examples of variants for the walls of the radial type and of the circular type.
  • the walls 10A are. rectilinear and inscribed in radial planes, while the walls 11A are inscribed in cylinders coaxial with said structure.
  • Figure 6B the walls 10B are rectilinear and inscribed in parallel planes two by two, while the walls 11B are rectilinear between two adjacent walls 10B, defining contours in broken line.
  • Figure 6C the walls 10C are wavy, while the walls 11C are inscribed in coaxial cylinders, but staggered at each pair of walls 10C and connecting them to the tops of the corrugations.
  • each annular end face has a radial selective obturation, obturation which can be obtained by a set of radiating annular sectors: these sectors have been shown, with parts broken away, in FIGS. 6A, 6B, 6C, with the respective references 19A, 19B, 19C. If these sectors are wide enough, we can even, as shown in FIG.
  • a cut portion 20 opening onto other channels can be provided in their wide area by the flow admitted and discharged by the annular end faces; the walls 10D are here rectilinear, parallel for the cut portion, radial for the others, while the walls 11 D are circular.
  • Figure 8 There may be provided, Figure 8, a tip 21 at each end, whose circular flange 22 bears against the periphery of the annular end faces, or more precisely sectors 19D, and whose surface defines an interior chamber opening towards the outside by a narrower orifice 23.
  • FIG. 9 illustrates yet another example where the walls 10E and 11 E define for each channel a cell profile close to the square.
  • the relative spacing between the different walls will be chosen so as to be perfectly adapted to the stresses undergone under the effect of the differential pressure of the two flows.
  • the radial type walls are arranged so as to distribute, according to the aerodynamic criteria desired.
  • the surface offered to each of the two flows in particular, the spacing between said walls will be chosen according to the flow rates and speeds of each of the flows.
  • the annular design by its rigidity of shape, makes it possible to design cartridges longer than with any other architecture of given useful section; then, the cylindrical section allows incidentally to provide a rotation of the structure around its axis during the stages of manufacture, which greatly promotes the homogeneity of drying.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Filtering Materials (AREA)
EP80105595A 1979-09-25 1980-09-18 Structure cylindrique alvéolaire monolithique statique à grande surface de contact Expired EP0025980B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7923767A FR2465985A1 (fr) 1979-09-25 1979-09-25 Structure alveolaire monolithique a grande surface de contact
FR7923767 1979-09-25

Publications (2)

Publication Number Publication Date
EP0025980A1 EP0025980A1 (fr) 1981-04-01
EP0025980B1 true EP0025980B1 (fr) 1983-04-20

Family

ID=9229969

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105595A Expired EP0025980B1 (fr) 1979-09-25 1980-09-18 Structure cylindrique alvéolaire monolithique statique à grande surface de contact

Country Status (7)

Country Link
US (1) US4343354A (enrdf_load_stackoverflow)
EP (1) EP0025980B1 (enrdf_load_stackoverflow)
JP (1) JPS57493A (enrdf_load_stackoverflow)
AU (1) AU540038B2 (enrdf_load_stackoverflow)
CA (1) CA1137074A (enrdf_load_stackoverflow)
DE (1) DE3062832D1 (enrdf_load_stackoverflow)
FR (1) FR2465985A1 (enrdf_load_stackoverflow)

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FR2549215B1 (fr) * 1983-07-11 1988-06-24 Produits Refractaires Echangeurs de chaleur moules en matiere refractaire
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US20070246106A1 (en) 2006-04-25 2007-10-25 Velocys Inc. Flow Distribution Channels To Control Flow in Process Channels
US9683474B2 (en) 2013-08-30 2017-06-20 Dürr Systems Inc. Block channel geometries and arrangements of thermal oxidizers
ES2564197B1 (es) * 2014-09-17 2016-10-10 Soler & Palau Research, S.L. Tubo de múltiples conductos para intercambiador de calor
US11892245B2 (en) 2014-10-07 2024-02-06 General Electric Company Heat exchanger including furcating unit cells
EP3204708B1 (en) * 2014-10-07 2020-11-25 Unison Industries, LLC Multi-branch furcating flow heat exchanger
EP3234489B1 (de) * 2014-12-18 2020-04-08 Zehnder Group International AG Wärmeübertrager und lufttechnisches gerät damit
US10088250B2 (en) 2016-01-12 2018-10-02 Hamilton Sundstrand Corporation Heat exchangers
DE102017100460A1 (de) * 2017-01-11 2018-07-12 Hanon Systems Vorrichtung zur Wärmeübertragung in einem Kältemittelkreislauf
CN110006274A (zh) * 2018-01-04 2019-07-12 日本碍子株式会社 热交换部件及热交换器
DE112018000203T5 (de) 2018-01-05 2019-09-05 Ngk Insulators, Ltd. Wärmeaustauschelement, Wärmetauscher und Wärmetauscher mit Reinigungseinrichtung
IT201800010006A1 (it) * 2018-11-02 2020-05-02 Sumitomo Riko Co Ltd Scambiatore di calore interno
CN112191049B (zh) * 2020-09-30 2021-05-04 山东贝斯特节能技术有限公司 一种高温烟气节能环保处理系统
FR3119670B1 (fr) * 2021-02-09 2023-03-17 Safran Echangeur thermique et son procédé de fabrication
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EP4070957B1 (en) * 2021-04-09 2025-05-28 Hamilton Sundstrand Corporation Heat exchangers
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Also Published As

Publication number Publication date
JPS57493A (en) 1982-01-05
JPH02635B2 (enrdf_load_stackoverflow) 1990-01-08
EP0025980A1 (fr) 1981-04-01
FR2465985A1 (fr) 1981-03-27
AU540038B2 (en) 1984-11-01
CA1137074A (fr) 1982-12-07
DE3062832D1 (en) 1983-05-26
AU6268880A (en) 1981-04-09
US4343354A (en) 1982-08-10

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