WO1995001541A1 - Echangeur thermique a regeneration - Google Patents

Echangeur thermique a regeneration Download PDF

Info

Publication number
WO1995001541A1
WO1995001541A1 PCT/SE1994/000658 SE9400658W WO9501541A1 WO 1995001541 A1 WO1995001541 A1 WO 1995001541A1 SE 9400658 W SE9400658 W SE 9400658W WO 9501541 A1 WO9501541 A1 WO 9501541A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
pressure gas
heat exchanger
cylindrical part
plates
Prior art date
Application number
PCT/SE1994/000658
Other languages
English (en)
Inventor
Berndt Lindström
Original Assignee
Lindstroem Berndt
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
Priority claimed from SE9302301A external-priority patent/SE503801E/sv
Priority claimed from SE9400441A external-priority patent/SE9400441L/
Application filed by Lindstroem Berndt filed Critical Lindstroem Berndt
Priority to PL94312292A priority Critical patent/PL177852B1/pl
Priority to EP94920634A priority patent/EP0715706B1/fr
Priority to DE69418610T priority patent/DE69418610D1/de
Publication of WO1995001541A1 publication Critical patent/WO1995001541A1/fr

Links

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
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F28D19/047—Sealing means

Definitions

  • the present invention relates to a regenerative heat exchanger of the type set forth in the preamble of the following claim 1.
  • a heat exchanger of this type is known from the Swedish patent specification No. 176 375 showing setting means in the shape of rolling elements, which are mounted on the radially outer end portions of the sector plates, rolling on a flange extending around the periphery of the top side and bottom side of the rotor.
  • each setting unit is axially adjustable and completed with an adjacent, axially directed measuring rod, which from a rest position is instantaneously movable against and in contact with a corresponding flange and designed to indicate when the magnitude of the gap demands a forward adjustment of the unit a small distance such that the original gap is reset.
  • This solution is not satisfying, either, because the varying and sometimes comparatively rapid wear reguires an extensive supervision.
  • each setting unit comprises at least one axial,through passage, which is connected to a pressure gas source supplying a sufficient pressure for the creation of a gas cushion between the setting unit and the end flange of the cylindrical part.
  • the outer ends of the sector plates are, as usual, balanced by means of counterweights such that a suitable bearing pressure is obtained. If the bearing pressure is set too low in order to reduce the gas pressure need to create the gas cushions, it may happen that the sector plates are thrown up a distance by pressure shocks from the heat exchanging media. Temporary pressure shocks can be counteracted by shock absorbers, but long term pressure shocks demand a higher bearing pressure, for instance by means of springs, which apply a pressure on the sector plates in the direction towards the ends of the cylindrical part, and, thus, also a higher pressure of the pressure gas source. This solution would be satisfactory under normal working conditions. It may happen occasionally, however, owing to different reasons, that the compressor or the gas pressure source supplying the setting units with compressed air gets into shut-down.
  • a pressure gas source or the same pressure gas source that feeds the setting units with pressure gas, is utilized for setting a predetermined bearing pressure of the sector plates against the flanges by means of pressure operated pistons acting upon the sector plates. If the gas pressure creating the gas cushions ceases, also the pressure operatin the pistons ceases, which results in an immediate relief of the pressure from the sector plates upon the setting units, when they start sliding on the flanges.
  • Figure 1 is an axial section taken on line I-I of Figure 2
  • Figure 2 is a top end view of the heat exchanger with inlet and outlet ducts in section
  • Figure 3 is an axial section taken on line III-III of Figure 1.
  • the drawings illustrate a conventional heat exchanger with a stationary housing structure 1 and a cylindrical rotor 2 containing a mass of heat regenerating material 3.
  • the rotor 2 is provided with a hub 4, and a fixed top sector plate 5 to which a movable sector plate 6 is hinged, and a corresponding fixed bottom sector plate 7 with a movable sector plate 8.
  • the purpose of the two sector plates 5,6 and 7,8 is to sealingly bear as good as possible on the top and bottom ends of the rotor 2 and by that separate the heat exchanging media flowing through the rotor.
  • Each of the radially outer ends of the movable sector plates (6,8) are for that purpose provided with two units 10, which comprise a setting means 11 for maintaining a certain gap between the ends of the sector plates 6,8 and an annular top and bottom end flange 12 fixedly attached to the rotor 2 around its top and bottom peripheries.
  • each unit preferably comprises also a measuring device, not shown, suitably of fibre optic type, for control measurement of the gap.
  • Figure 3 illustrates a part of the housing structure 1 and the top end flange 12 of the rotor 2 and the movable top sector plate 6.
  • One of the units 10 is fastened with screws in an aperture in the sector plate 6, which unit comprises an outer sleeve 15 with a mounting flange 16, that is fastened with screws 18 on the sector plate 6 with an intermediate sealing ring 17.
  • the sleeve 15 At the top of the sleeve 15 there is an interior thread 19, and an inner sleeve 20 is positioned in the sleeve 15 with an upper part, which is provided with an external thread 21 partially screwed on the thread 19.
  • the inner sleeve 20 At the bottom the inner sleeve 20 is provided with a sealing 22, which is sealingly applied against the inner wall of the sleeve 15.
  • the top end 23 of the inner sleeve is closed and its bottom end is provided with a bottom plate 24 welded to the outer sleeve.
  • a setting means in the shape of a circular sliding shoe is replaceably fastened by means of a countersunk fastening screw 26 threaded into the bottom plate and provided with an axial through channel 40 connecting the interior of the sleeve 20 with a recess 41 in the underside of the sliding shoe 25.
  • the mounting flange 16 of the outer sleeve 15 is provided with an axial flange 27 to which one end of an annular, slightly curved sealing bellow 28 is attached, the other end of which being attached to an axial sleeve 29 surrounding the unit 10 and positioned in a mounting hole in the housing structure 1 and attached to it by means of a mounting flange 30 and an intermediate sealing ring 31.
  • the top portion of the outer sleeve 15 is provided with a mounting lug 32 to which one end of a beam 33 is attached. The other end is in a corresponding way attached to the other unit 10 (not shown) supporting an end portion of a sector plate.
  • a pressure cylinder 34 is attached to the housing structure 1, said pressure cylinder having a piston 35 and a piston rod 36 attached to the beam 33.
  • a compression spring 37 is acting on the underside of the piston 35 and the pressure from a pressure gas conduit 38 is acting on the upper side of the piston.
  • the conduit connects a pressure gas source (not shown) with a nipple 39 mounted in a through hole in the top portion of the top end 23 and provided with a channel to the interior of the sleeve 20 and a channel transmitting the pressure to the continuation of the conduit 38 to the cylinder 34.
  • the weight of the sector plate 6 and associated equipment is mainly balanced by a balancing means (not shown) and the spring force from the spring 37.
  • a bearing force of the sliding shoe 25 corresponding to a load of round 50 kg is created by a pressure of 2 bar in the sleeve 20 and in the cylinder 34 in combination with a suitable area of the piston 35.
  • An air cushion is created on the underside of the sliding shoe 25 by the gas flowing out from the recess 41 such that the gap between the underside of the sliding shoe and the end flange 12 amounts to about 0.3 mm.
  • the lifting force in the direction from the flange 12 also should cease together with the pressure force in the opposite direction from the piston 35 in the cylinder 34.
  • the contact force of the sliding shoe 25 against the flange 12 will be sufficiently low to permit sliding of the sliding shoe on the flange 12 for a long time without damages and still with a reasonable sealing function of the sector plate till the break-down is repaired.
  • the sliding shoes 25 and the cylinders 34 may be pressurized by two separate pressure gas sources. In this case cease of pressure to the sliding shoes should initiate a simultaneous cease of pressure to the pressure cylinders.
  • the gap between the sector plates 6 and the end flanges 12 is suitably as small as 1-3 mm.
  • This is adjusted by turning of the upper portion 23 of the inner sleeve 20 by inserting a key into recesses in the upper portion 23 after loosening of a possible locknut which may be locked against the outer sleeve 15.
  • a correct adjustment may be indicated for instance by the previously mentioned device of fibre optic type, which in the usual way may be arranged to control a motor-driven adjustment apparatus for turning the inner sleeve 20 and its top portion 23 as an alternative for the hand operated adjustment procedure, which of course cannot take place as frequent as a motor operated adjustment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Joints Allowing Movement (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Power Steering Mechanism (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

Echangeur thermique rotatif à régénération comportant une première partie principale essentiellement cylindrique (2) renfermant une masse de matière régénérante (3), ainsi qu'une seconde partie principale comportant une structure d'ossature pourvue de conduits d'amenée et d'évacuation des milieux caloporteurs, lesdites parties principales étant séparées l'une de l'autre par des plaques à secteurs mobiles (5, 6, 7, 8), un petit espace étant ménagé entre ces plaques et les extrémités de la partie cylindrique (2) par des unités de positionnement sous forme de patins coulissants (25) montés axialement mobiles sur les parties terminales extérieures des plaques à secteurs (6, 8) en face de rebords terminaux (12) s'étendant autour de la périphérie de chaque extrémité de la partie cylindrique. Les faces terminales des patins coulissants (25) sont pourvues de concavités (40, 41) situées en regard des rebords terminaux correspondants, lesdites concavités étant en communication avec une source de gaz sous pression servant à créer un coussin de gaz sous pression entre chaque patin (25) et le rebord terminal correspondant (12). Selon un mode préféré de réalisation, les plaques à secteurs pivotantes (6, 8) sont poussées vers l'extérieur à partir des extrémités de la partie cylindrique par des éléments élastiques (37) et/ou des éléments d'équilibrage, et dans le sens contraire par des dispositifs pousseurs (34, 35) actionnés par un milieu sous pression dont l'alimentation est interrompue dans le cas d'une chute de la pression de la source de gaz sous pression alimentant les patins coulissants (25).
PCT/SE1994/000658 1993-07-02 1994-07-01 Echangeur thermique a regeneration WO1995001541A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL94312292A PL177852B1 (pl) 1993-07-02 1994-07-01 Regeneracyjny wymiennik ciepła
EP94920634A EP0715706B1 (fr) 1993-07-02 1994-07-01 Echangeur thermique a regeneration
DE69418610T DE69418610D1 (de) 1993-07-02 1994-07-01 Regenerativ-wärmetauscher

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9302301-8 1993-07-02
SE9302301A SE503801E (sv) 1993-07-02 1993-07-02 Regenerativ värmeväxlare där släpskor och luftkuddar upprätthåller spelet mellan sektorplåt och rotor
SE9400441A SE9400441L (sv) 1994-02-10 1994-02-10 Anordning vid roterande regenerativ värmeväxlare med en tryckgaskudde mellan släpskor och rotorflänsar
SE9400441-3 1994-02-10

Publications (1)

Publication Number Publication Date
WO1995001541A1 true WO1995001541A1 (fr) 1995-01-12

Family

ID=26661789

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1994/000658 WO1995001541A1 (fr) 1993-07-02 1994-07-01 Echangeur thermique a regeneration

Country Status (6)

Country Link
EP (1) EP0715706B1 (fr)
AT (1) ATE180325T1 (fr)
DE (1) DE69418610D1 (fr)
HU (1) HU9503580D0 (fr)
PL (1) PL177852B1 (fr)
WO (1) WO1995001541A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996024812A1 (fr) * 1995-02-10 1996-08-15 Ljungström Technology Ab Echangeur thermique a regeneration et procede d'exploitation d'un echangeur thermique a regeneration
WO1996024813A1 (fr) * 1995-02-10 1996-08-15 Ljungström Technology Ab Echangeur thermique rotatif a regeneration et procede d'exploitation d'un echangeur thermique rotatif a regeneration
WO1996026407A1 (fr) * 1995-02-24 1996-08-29 Ljungström Technology Ab Echangeur de chaleur rotatif a regeneration et son mode d'utilisation
WO1996033381A1 (fr) * 1995-04-20 1996-10-24 Ljungström Technology Ab Echangeurs de chaleur rotatifs pourvus de patins coulissants
WO1996041996A1 (fr) * 1995-06-08 1996-12-27 Ljungström Technology Ab Echangeur thermique rotatif a regeneration
WO1997007374A1 (fr) * 1995-08-17 1997-02-27 Ljungström Technology Ab Echangeur de chaleur regenerateur rotatif
US5845700A (en) * 1996-10-31 1998-12-08 Ljungstrom Technology Ab Rotary regenerative heat exchanger

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6261092B1 (en) 2000-05-17 2001-07-17 Megtec Systems, Inc. Switching valve
US6749815B2 (en) 2001-05-04 2004-06-15 Megtec Systems, Inc. Switching valve seal
US7325562B2 (en) 2002-05-07 2008-02-05 Meggec Systems, Inc. Heated seal air for valve and regenerative thermal oxidizer containing same
US6669472B1 (en) 2002-08-28 2003-12-30 Megtec Systems, Inc. Dual lift system
US7150446B1 (en) 2002-08-28 2006-12-19 Megtec Systems, Inc. Dual lift system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678193A (en) * 1949-09-20 1954-05-11 Power Jets Res & Dev Ltd Sealing device for regenerative heat exchangers
US3122200A (en) * 1960-05-24 1964-02-25 Koch Jakob Dynamic sealing means for rotary regenerative heat exchangers
US3232335A (en) * 1962-03-21 1966-02-01 Svenska Rotor Maskiner Ab Rotary regenerative preheater

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1120485B (de) * 1954-07-02 1961-12-28 Appbau Rothemuehle Dr Brandt & Abdichtungseinrichtung an Waermeaustauschern, die aus einer feststehenden Regenerativkammer und drehbaren Zu- und Ableitungsvorrichtungen fuer das eine Medium bestehen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678193A (en) * 1949-09-20 1954-05-11 Power Jets Res & Dev Ltd Sealing device for regenerative heat exchangers
US3122200A (en) * 1960-05-24 1964-02-25 Koch Jakob Dynamic sealing means for rotary regenerative heat exchangers
US3232335A (en) * 1962-03-21 1966-02-01 Svenska Rotor Maskiner Ab Rotary regenerative preheater

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996024812A1 (fr) * 1995-02-10 1996-08-15 Ljungström Technology Ab Echangeur thermique a regeneration et procede d'exploitation d'un echangeur thermique a regeneration
WO1996024813A1 (fr) * 1995-02-10 1996-08-15 Ljungström Technology Ab Echangeur thermique rotatif a regeneration et procede d'exploitation d'un echangeur thermique rotatif a regeneration
WO1996026407A1 (fr) * 1995-02-24 1996-08-29 Ljungström Technology Ab Echangeur de chaleur rotatif a regeneration et son mode d'utilisation
WO1996033381A1 (fr) * 1995-04-20 1996-10-24 Ljungström Technology Ab Echangeurs de chaleur rotatifs pourvus de patins coulissants
WO1996041996A1 (fr) * 1995-06-08 1996-12-27 Ljungström Technology Ab Echangeur thermique rotatif a regeneration
EA000246B1 (ru) * 1995-06-08 1999-02-25 Свенска Ротор Маскинер Аб Вращающийся регенеративный теплообменник
WO1997007374A1 (fr) * 1995-08-17 1997-02-27 Ljungström Technology Ab Echangeur de chaleur regenerateur rotatif
US5911270A (en) * 1995-08-17 1999-06-15 Svenska Rotor Maskiner Ab Rotary regenerative heat exchanger
US5845700A (en) * 1996-10-31 1998-12-08 Ljungstrom Technology Ab Rotary regenerative heat exchanger

Also Published As

Publication number Publication date
PL177852B1 (pl) 2000-01-31
DE69418610D1 (de) 1999-06-24
EP0715706B1 (fr) 1999-05-19
EP0715706A1 (fr) 1996-06-12
PL312292A1 (en) 1996-04-15
ATE180325T1 (de) 1999-06-15
HU9503580D0 (en) 1996-02-28

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