US3891030A - Cylindrical heating-surface support structure for regenerative air preheaters - Google Patents

Cylindrical heating-surface support structure for regenerative air preheaters Download PDF

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Publication number
US3891030A
US3891030A US263553A US26355372A US3891030A US 3891030 A US3891030 A US 3891030A US 263553 A US263553 A US 263553A US 26355372 A US26355372 A US 26355372A US 3891030 A US3891030 A US 3891030A
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United States
Prior art keywords
sector
radial
extending
walls
support structure
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Expired - Lifetime
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US263553A
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English (en)
Inventor
Siegfried Hans-Dietma Schluter
Erich Kraft
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Apparatebau Rothemuehle Brandt and Kritzler GmbH
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Apparatebau Rothemuehle Brandt and Kritzler GmbH
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Expired - Lifetime legal-status Critical Current

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    • 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
    • F28D19/041—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 with axial flow through the intermediate heat-transfer medium
    • F28D19/042—Rotors; Assemblies of heat absorbing masses
    • F28D19/044—Rotors; Assemblies of heat absorbing masses shaped in sector form, e.g. with baskets

Definitions

  • the invention relates to a cylindrical heating-surface support structure for regenerative air preheaters which is fabricated in parts and completely assembled only on the building site.
  • a particular disadvantage of this present type is the use of axially parallel welded connections the outer ends of which are subjected to high peak stresses in tension, compression or shear; with increasing diameters of the support structures and increasing deforming forces, this may lead to a breaking of the welded seams.
  • the present invention is therefore based on the task of increasing the stability of the structure with the lowest possible material and production costs, chiefly by a more advantageous arrangement and design of the supporting parts and their welded connections.
  • the supporting structure consists of cellular sector elements which consist of radial walls equally angularly displaced from each other of at least one connecting sheet in the direction of a chord to a circle centred on the centre of the structure, the radial walls being inserted and welded between at least one of central core plates and segments of coaxial outer ring flanges perpendicular to the axis of the regenerator, within a radial length which amounts approximately to 0.15 to 0.3 times the axial height of the regenerative chamber.
  • the heating-surface support structure may consist of equal or different numbers of two different sorts of prefabricated sector elements which are arranged alternatively.
  • FIG. 1 shows an elevation of a sector element
  • FIGS. 2 and 3 show horizontal plans of different sorts of assembled sector elements
  • FIG. 4 shows a sectional elevation of the whole heating-surface support structure on a smaller scale, and on the section line IVIV, FIG. 5, and
  • FIG. 5 shows the corresponding plan view on the line VV, FIG. 4.
  • cylindrical heatingsurface support structure for a rotary regenerative air preheater is sub-divided into sixteen cellular sector elements of two different sorts, l and 2 respectively, which follow each other alternatingly around the circle, each sector element 2 being provided with a support claw 7.
  • each sector element 1 has the basic form of the sector element 2 and has a central radial wall 3 of radial length 1 and extending from inner core plates 5, 5' of a hub body 8 to outer ring flanges 6, 6' of an annular support body 9; the core plates and ring flanges both lie in planes perpendicular to the axis of the cylindrical body, and are respectively coplanar.
  • Shorter sector walls 4 of a length 1. are arranged symmetrically at equal angular distances from the radial sector wall 3.
  • the element 2 also has four of the connecting sheets U to U arranged between the radial walls 4 and 3 parallel to the regenerator axis and as a chord to circles centred on the axis of the cylindrical body and extend over the sector angle a; as well as two of the connecting sheets U and U., which extend over the angular distance 2a.
  • the second sort of element shown by element 2 has three radial walls 3 two of which lie at the sector boundaries of the element, and the centre one of which has a slightly greater radial length to extend into the support claw 7. As shown in FIG. 5, elements 2 subtend an angle 012 while elements 1 subtend an angle 011 at the centre of the cylindrical body.
  • the flange rings 6, 6' are made up of segments of arcuate length b, and b according to whether they are to form part of elements 1 or elements 2. As is best seen from FIGS. 2 and 3, and from FIG. 5, the ends of the sectors do not correspond with the radii lying at the edges of the sector elements 1,2.
  • the connecting sheets need not all be arranged at equal radial distance from each other sheets U and U for example, are set closer together than sheets U U and form a double shelled outer annular support structure together with the flanges 6,6.
  • the radial walls 3, 4 of the sector elements 1, 2 are inserted and welded between the plate and ring surfaces 5, 5 or 6, 6 within a radial length A amounting approximately to 0.15 0.3 times the height h of the regenerative chamber formed by the assembly.
  • Heat-storage elements are inserted within the trapezoidal sectors formed by the radial walls and the connecting sheets and supported therein.
  • Another advantage is the substantial saving of material and of processing costs, particularly in view of the present method of carrying out the connection between the radial walls and an inner cylindrical core part of the heating-surface support.
  • This dimensionally stable cylindrical core part had previously to be precisely machined on all sides and this resulted in very high additional production costs.
  • a structural element which is resistant to bending and torsion is created by providing a double shell at the radially outer side with frontal limiting flanges, and radial walls arranged between the latter.
  • Regenerative heat exchange support structure for supporting a plurality of heat exchange element packs in a generally cylindrical cellular arrangement comprising, in combination, a pair of core plates extending in respective planes perpendicular to the axis of the cylindrical structure, a pair of annular ring flanges extending in the same respective planes, the core plates being at a radially inner peripheral region of the structure and the ring flanges at a radially outer peripheral region of the structure, a plurality of pairs of prefabricated sector units, each of said units comprising a full length radial supporting wall extending from radially within an outer periphery of the core plates to radially beyond an inner periphery of the ring flanges and a plurality of chordal connecting sheets carried on the wall, one unit of each of said pairs comprising only one full length radial wall,
  • the plurality of chordal connecting sheets attached thereto defining laterally open-ended volumes and the other unit of each of said pairs comprising an additional full length radial wall extending along each sector edge defining a dividing wall between the units of said pair of units and closing the said lateral open ends of said volumes, the said full length walls being welded between the core plates at their inner ends and the ring flanges at their outer ends, by welds extending radially of the axis.
  • each of said flanges extend peripherally around said units at each of the top and bottom surfaces thereof and each of said flanges comprises a plurality of sector pairs, one sector of each pair being associated with one of said sector units, the flange sector associated with the sector unit lacking sector edge radial walls terminating angularly inwardly of the sector edge and the flange sector associated with the sector unit having a full length radial edge walls extending therepast and overlapping the juncture between said sector edge full length walls and said chordal connecting sheet.
  • Heat exchange support structure defined in claim 2 comprising unitary core plates of one-piece construction overlapping and joining all of said units generally axially thereof.
  • a regenerative preheater support structure according to claim 3 wherein the radial extent of the said radially extending welds on the inner and outer ends of said full length radial supporting walls amounts to approximately 0.15 to 0.3 times the axial height of the support structure.
  • Cylindrical supporting structure for supporting heat storage masses of rotary regenerative air preheaters, the structure being completely assembled only on site from two types of prefabricated elements, the structure comprising, in combination cellular sector cells comprising radial walls extending in respective planes including the axis of the cylindrical structure and arranged at equal angular distances from each other and connecting sheets secured to at least one of said radial walls and arranged as chords to circles centered on the axis of the cylinder, the radial walls being inserted between and welded to upper and lower central core plates extending in planes perpendicular to the regenerator axis and to segments of upper and lower co-axial outer ring flanges extending in planes perpendicular to the axis of the cylinder along welds extending radially of the axis of the cylinder, said welds between said walls and said flanges and core plates, respectively, extending along a radial length amounting to approximately 0.15 to 0.3 times the axial height of the support

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US263553A 1971-06-18 1972-06-16 Cylindrical heating-surface support structure for regenerative air preheaters Expired - Lifetime US3891030A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2130196A DE2130196B2 (de) 1971-06-18 1971-06-18 Zylindrische Heizflächen-Tragkonstruktion für Regenerativ-Luftvorwärmer

Publications (1)

Publication Number Publication Date
US3891030A true US3891030A (en) 1975-06-24

Family

ID=5811090

Family Applications (1)

Application Number Title Priority Date Filing Date
US263553A Expired - Lifetime US3891030A (en) 1971-06-18 1972-06-16 Cylindrical heating-surface support structure for regenerative air preheaters

Country Status (8)

Country Link
US (1) US3891030A (enExample)
JP (1) JPS5632786Y2 (enExample)
DE (1) DE2130196B2 (enExample)
ES (1) ES404220A1 (enExample)
FR (1) FR2142439A5 (enExample)
GB (1) GB1388663A (enExample)
IT (1) IT958363B (enExample)
ZA (1) ZA724094B (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6155209A (en) * 1999-11-23 2000-12-05 Abb Air Preheater, Inc. Air preheater sector plate design with centered sealing arrangements
WO2001053767A1 (en) * 2000-01-19 2001-07-26 Howden Power Limited Rotary regenerative heat exchanger and rotor therefor
KR101186524B1 (ko) 2009-03-24 2012-10-10 알스톰 테크놀러지 리미티드 모듈형 공기 예열기를 변형하기 위한 장치 및 방법
WO2020088237A1 (zh) * 2018-10-31 2020-05-07 中国电建集团山东电力建设第一工程有限公司 一种回转式空预器的转子隔板的焊接安装工艺
US12007174B2 (en) 2020-05-13 2024-06-11 Howden Group Limited Parabolically deforming sector plate

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4773145A (en) * 1983-09-09 1988-09-27 The Air Preheater Company, Inc. Method of constructing a cylindrical rotor assembly for a rotary regenerative heat exchanger
CN109282300B (zh) * 2018-09-10 2022-07-12 东方电气集团东方锅炉股份有限公司 大型空气预热器的制作方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3267562A (en) * 1963-04-29 1966-08-23 Air Preheater Rotor assembly
US3361193A (en) * 1964-10-16 1968-01-02 Kritzler Arthur Regenerative heat exchangers
US3391727A (en) * 1966-11-14 1968-07-09 Ford Motor Co Disc type rotary heat exchanger
US3702156A (en) * 1970-12-03 1972-11-07 Aero Flow Dynamics Inc Air-to-air energy exchange wheel and method of fabrication

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416595A (en) * 1966-10-20 1968-12-17 Int Harvester Co Heat exchanger rotor and method for making same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3267562A (en) * 1963-04-29 1966-08-23 Air Preheater Rotor assembly
US3361193A (en) * 1964-10-16 1968-01-02 Kritzler Arthur Regenerative heat exchangers
US3391727A (en) * 1966-11-14 1968-07-09 Ford Motor Co Disc type rotary heat exchanger
US3702156A (en) * 1970-12-03 1972-11-07 Aero Flow Dynamics Inc Air-to-air energy exchange wheel and method of fabrication

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6155209A (en) * 1999-11-23 2000-12-05 Abb Air Preheater, Inc. Air preheater sector plate design with centered sealing arrangements
WO2001053767A1 (en) * 2000-01-19 2001-07-26 Howden Power Limited Rotary regenerative heat exchanger and rotor therefor
KR101186524B1 (ko) 2009-03-24 2012-10-10 알스톰 테크놀러지 리미티드 모듈형 공기 예열기를 변형하기 위한 장치 및 방법
WO2020088237A1 (zh) * 2018-10-31 2020-05-07 中国电建集团山东电力建设第一工程有限公司 一种回转式空预器的转子隔板的焊接安装工艺
US12007174B2 (en) 2020-05-13 2024-06-11 Howden Group Limited Parabolically deforming sector plate

Also Published As

Publication number Publication date
DE2130196C3 (enExample) 1974-05-02
ZA724094B (en) 1973-03-28
DE2130196B2 (de) 1973-10-04
IT958363B (it) 1973-10-20
JPS5632786Y2 (enExample) 1981-08-04
FR2142439A5 (enExample) 1973-01-26
ES404220A1 (es) 1975-05-16
JPS4864853U (enExample) 1973-08-17
GB1388663A (en) 1975-03-26
DE2130196A1 (de) 1973-01-04

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