US2549583A - Regenerative heat exchanging apparatus - Google Patents

Regenerative heat exchanging apparatus Download PDF

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Publication number
US2549583A
US2549583A US762522A US76252247A US2549583A US 2549583 A US2549583 A US 2549583A US 762522 A US762522 A US 762522A US 76252247 A US76252247 A US 76252247A US 2549583 A US2549583 A US 2549583A
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US
United States
Prior art keywords
rotor
air
package
preheater
packages
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 - Lifetime
Application number
US762522A
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English (en)
Inventor
Holand Charles Ernest
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.)
Alstom Power Inc
Original Assignee
Air Preheater Co Inc
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Filing date
Publication date
Application filed by Air Preheater Co Inc filed Critical Air Preheater Co Inc
Application granted granted Critical
Publication of US2549583A publication Critical patent/US2549583A/en
Anticipated expiration legal-status Critical
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/02—Arrangements of regenerators
    • 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
    • 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
    • Y10S165/009—Heat exchange having a solid heat storage mass for absorbing heat from one fluid and releasing it to another, i.e. regenerator
    • Y10S165/01—Cleaning storage mass

Definitions

  • the invention relates to regenerative heat ex'- changing apparatus, herein, for brevity, referred to as air preheaters of the type in which the heat transmitting material is packed into compartments formed by radial and circumferential division plates of a cylindrical rotor which rotates inside a stationary casing connected to ducts conveying the working fluids to and from the apparatus. 7
  • I provide in each of the ends of the casing a door which is large enough to give ready and direct access from outside to the sectoral compartments of the rotor and to allow the heat transmitting material to be washed while it remains in its place in the respective compartment of the rotor and without any need for an attendant to enter the ducts.
  • the heat transferring material is assembled into packages arranged for ready application of lifting tackle, and the size, shape and outline of the access doors are such that withdrawal or replacement of the packages is possible without interference with any other parts of the rotor, while the boiler or any other plant of which the preheater may be part is kept in operation and the working gases continue to pass through the preheater.
  • Fig. 1 is a side elevation, partly sectional on theline l-l of Fig. 2 of an air preheater of the type referred to, showing package removal and washing arrangements according to one embodiment of the invention, the ducts by which fluid is led to and from the rotor being omitted;
  • Figure 2 is an end elevation also partly sectional, the plane of the section being through the line 22 of Fig. 1;
  • Figure 3 is a plan view
  • Figure 4 is a plan view drawn to a larger scale, of one sector of the rotor shown in the preceding figures;
  • Figure 5 is a fragmentary plan view drawn to a larger scale showing in detail the construction of the plates of the sector shown in Figure 4;
  • Figure 6 is a plan, drawn to a larger scale of one sector of the rotor with a heating element package in position therein, according to one arrangement of the invention
  • Figure '7 is a fragmentary sectional View through the line 1-'l of Figure 6; i
  • Figure 8 is a fragmentary sectional view drawn to a larger scale through the line 8-8 of Figure 6, showing spacer elements and upper and lower seals;
  • Figure 9 is a fragmentary sectional view showing a support for a package
  • Figure 10 is a fragmentary plan drawn to a larger scale of the top door and adjoining parts of the apparatus;
  • FIG 11 is a fragmentary sectional view through the line H-ll of Figure 10;
  • Figure 12 is a similar sectional view at right; angles to Figure 11 through the line
  • Figure 13 is a plan of a rotor sector accordin i to another form of theinvention, the heat transferring elements being omitted for clearness;
  • Figure 14 is a fragmentary section showing radial seals, sector plate opening and partially withdrawn package
  • Figure 15 is a plan of another form of sector
  • Figure 16 is a fragmentary section through the line Iii-46 of Figure 15;
  • Figure 1'7 is a like section through the line I1I! of Figure 15; and Figures 18 and 19 are a front elevational and distinguished where necessary by the addition-of an exponent.
  • the rotor I With its sectors 2 formed by radial division plates 3 and sub-divided into compartments by circumferential plates 4 is suspended by a thrust and journal bearing 5 mounted in the center of an upper girder frame *6 and steadied at the bottom by a journal bearing 1 carried by a lower girder frame 8.
  • each girder an opening l'2, Figure 10 is cut through the respective end wall Ill to give direct access from the exterior of the casing to the rotor compartments.
  • the openings l2 correspond substantially in Size and outline to the horizontal section through one of the rotor sectors. They are arranged symmetrically to the same radial plane through the rotor axis and are closed by upper and lower hinged covers l3, l3 whose interior faces are flush with the inside of the casing end walls. The covers are kept gas tight by means of clamping devices 14, see Figs. 10, 11 and 12.
  • Liners built up from corrugated and fiat plates 15, i6 are fixed by means of clamps I! on the sides of the radial division plates 3 of the rotor.
  • the thickness of these liners is such that they reduce the circumferential width of the rotor compartments to slightly less than that of the free space between the radial seals of the rotor.
  • the heat transferring material consists of corrugated metal sheets l8, H! which are bundled into shells 50 and form packages which fit closely into the several rotor compartments.
  • a flat plate is built into each package.
  • the upper and lower ends of the plate 20 project .beyond the body of the package.
  • the sheets l8, I9 are supported on bars 2
  • , 2! together form a convenient carrier by means of which the respective package may be lowered into, or lifted out of, the respective rotor compartment in a straight vertical drop or lift without touching the radial seals.
  • rest on bearers 22 attached to the package shells.
  • the forward package of a pair When inserting these packages into the rotor the forward package of a pair is first lowered until its top edge is below and clear of the edge of the respective seal and is then moved or swung in below the seal and put down on its bearers. The second or rear package of the pair can then be lowered into its place without touching the radial seal. In the reverse operation of removing the packages from the rotor the rear package is taken out first in a straight vertical lift. The second package is then raised until free of its bearer, moved sidewise until clear of the seal, and then drawn in a straight lift.
  • the packages of any of the described arrangements when lifted vertically from their compartments in the manner described, will pass freely through the door openings.
  • the packages can therefore be taken out of, or put into, the preheater through the upper doorway, with the radial seals left in position, and without need for the attendant to enter any of the ducts leading to and from the preheater.
  • the rotor is stopped for this purpose so that one of its sectoral compartments is just below the access door I3. In this position the radial seals prevent troublesome escape of air or gas so that the operation can be performed while the plant of which the preheater forms a part is working and while .gas and air continue to pass through the preheater.
  • a gallery 26 (Figs. 1 and 2) is built at a convenient level across the space between the ducts 27, 28 leading up to the preheater to give access to the lower access door I3.
  • the gallery has a floor 29 of grating or perforated metal beneath or opposite of the lower access door i3. Below it there is a trough 30 with drain 3
  • a winch 33 is provided for operating the lower door through the medium of a rope 33.
  • the two access doors l3, l3 to the rotor are opened and the rotor is stopped with one of its sectors fully exposed at the doors.
  • An alkaline solution is first applied in a slow continuous flow at the top of the rotor.
  • a high pressure jet of water is then used to remove the softened deposit.
  • the solution and water are drained away through the grating 29 of the gallery '26, provision being made for recirculating the solution.
  • separate air and gas by-pass ducts may be provided as indicated in dot-and-dash lines at 2?, 28 respectively, in Figure 2.
  • the adaption of the invention to a preheater with a horizontal axis is illustrated in Figures 18 and 19 in which parts corresponding to those before described are indicated by the same reference characters with the addition of the exponent c.
  • the rotor shaft 3;! is conveniently carried by journal bearings '34.
  • 35 denotes columns carrying the bearings 34, gearing 3%, Bl and the motor 37 driving the rotor.
  • the hinged doors at I30 giving access to the rotor are vertically below the bearings. These doors aresimilar in construction to the doors i 3 described and illus trated in Figure 10.
  • the package of heat transferring material may comprise one per compartment, with the radial division walls provided with liners, or they may be in pairs in unlined compartments.
  • the packages are preferably each built up'between two heavy plates 38 which are at both ends linked through welded-on lugs 39and pins to strong connecting bars iil. v
  • the packages must naturally be inserted and withdrawn horizontally and the bars are provided with holes suitable for application of Withdrawing and lifting gear.
  • a trough or hopper 4! with drain A 2 is arranged below the doors, forming an integral part of the preheater casing.
  • a regenerative heat'exchange apparatus having passages for a heating gas and air or other gaseous fluid to be heated, ducts for supp-lying hot gas and relatively cool air thereto, and a cylindrical rotor interiorly divided by radially extending partitions into sector shaped compartments carrying regenerative material adapted to be moved first through the gas passage and then.
  • a housing extending around said rotor; sector plates closing the ends of said housing and formed with a pair of circumferentially spaced openings communicating with said ducts for enabling the flow of gas and air through said rotor with another aperture located intermediate said openings having a circumferential extent corresponding substantially to the width of a sector shaped compartment; and access doors for said apertures hinged to said sector plates at opposite ends of the rotor to permit access to said regenerative material in a rotor compartment while the gas and air flow through other rotor compartments and without any need for entering either said gas or air duct.
  • a regenerative heat exchange apparatus having passages for a heating gas and air or other gaseous fluid to be heated, ducts for supplying hot gas and relatively cool air thereto, and a cylindrical rotor interiorly divided by radially extending partitions into sector shaped compartments carrying regenerative material adapted to be moved first through the gas passage and then into the air passage; a housing extending around said rotor; sector plates closing the ends of said housing and formed with a pair of circumferentially spaced openings communicating with said ducts for enabling the flow of gas and air through said rotor with another aperture located intermediate said openings having a circumferential extent corresponding substantially to the width of a sector shaped compartment; and access doors for said apertures hinged to said sector plates at opposite ends of the rotor to permit access to the rotor for cleaning said regenerative material in a rotor compartment while the gas and air flow through other rotor compartments and the material remains in its place in the compartment and Without any need for entering either said gas or air duct.
  • Regenerative heat exchange apparatus as recited-in claim 1 in which the rotor is suspended by a bearing mounted in an upper girder and steadied at the bottom by a bearing carried by a lower girder, openings being provided in the respective end walls of the casing between splayed ends of the girders corresponding in size and outline to the horizontal section through one of the rotor sectors, and covers clamped over said openings,
  • packages of heat transmitting material each comprising corrugated metal sheets bundled together and having flat plates built into each bundle and adjustably joined by supporting bars together forming a carrier for the package.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Drying Of Gases (AREA)
  • Air Supply (AREA)
US762522A 1944-05-08 1947-07-21 Regenerative heat exchanging apparatus Expired - Lifetime US2549583A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8641/44A GB587035A (en) 1944-05-08 1944-05-08 Improvements in or relating to regenerative heat exchanging apparatus

Publications (1)

Publication Number Publication Date
US2549583A true US2549583A (en) 1951-04-17

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US762522A Expired - Lifetime US2549583A (en) 1944-05-08 1947-07-21 Regenerative heat exchanging apparatus

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US (1) US2549583A (ja)
GB (1) GB587035A (ja)
NL (1) NL64657C (ja)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643098A (en) * 1947-07-23 1953-06-23 Shell Dev Heat exchanger
US2666624A (en) * 1950-02-18 1954-01-19 Air Preheater Interlocked seal for rotary regenerative preheaters
US2726849A (en) * 1950-11-23 1955-12-13 Svenska Rotor Maskiner Ab Supporting structure for rotors of regenerative air preheaters
US2751033A (en) * 1954-01-26 1956-06-19 Jefferson Lake Sulphur Co Fluid treating apparatus
US2789793A (en) * 1952-11-14 1957-04-23 Air Preheater Floating connecting plate for rotary preheater
US2797897A (en) * 1951-09-28 1957-07-02 Svenska Rotor Maskiner Ab Support of rotor housing of regenerative heat exchangers
US2812923A (en) * 1954-03-11 1957-11-12 Air Preheater Preheater washing device
US2863723A (en) * 1954-10-21 1958-12-09 Air Preheater Method of recovering heat and sulfur compounds from hot gaseous products of combustion
US2896920A (en) * 1953-06-12 1959-07-28 Carrier Corp Regenerator structure
DE1095978B (de) * 1957-08-10 1960-12-29 Appbau Rothemuehle Dr Brandt & Regenerativer Lufterhitzer mit zylindrischer Tragkonstruktion
US2969958A (en) * 1955-03-14 1961-01-31 Svenska Rotor Maskiner Ab Rotary devices, particularly rotary heat exchangers
US3181602A (en) * 1961-06-05 1965-05-04 Davidson & Co Ltd Heat exchangers
US3327771A (en) * 1965-08-30 1967-06-27 Babcock & Wilcox Co Regenerative heat exchangers
US3874442A (en) * 1972-02-16 1975-04-01 Svenska Rotor Maskiner Ab Pack of heat absorbing material and a support member therefor
JPS5083846A (ja) * 1973-11-28 1975-07-07
FR2403534A1 (fr) * 1977-09-16 1979-04-13 Wiking Lars Paquet de plaques rectangulaires juxtaposees pour echangeur de chaleur et procede pour sa fabrication
US4383573A (en) * 1982-01-28 1983-05-17 Combustion Engineering, Inc. Rotary regenerative air heater
US4673026A (en) * 1984-10-02 1987-06-16 Eagleair, Inc. Sealing arrangement for air preheater
US4791980A (en) * 1984-10-02 1988-12-20 Eagleair, Inc. Sealing arrangement for air preheater
US4940080A (en) * 1989-07-20 1990-07-10 Reeves & Woodland Industries Bi-directional flexible seal
US5005634A (en) * 1989-07-20 1991-04-09 Reeves Richard L Bi-directional flexible seal
US20090145574A1 (en) * 2007-12-05 2009-06-11 Frank Klisura Self-adjusting seal for a heat exchanger
US20110036536A1 (en) * 2009-08-17 2011-02-17 Paragon Airheater Technologies Full contact flexible seal assembly for heat exchanger
US20110037236A1 (en) * 2009-08-17 2011-02-17 Paragon Airheater Technologies Full contact flexible seal assembly for heat exchanger
US20130192041A1 (en) * 2012-01-26 2013-08-01 Fernando Treviño HURTADO Forced oscillation seals for air to gas leaks reduction in regenerative air preheaters

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732183A (en) * 1956-01-24 hammond
US2607564A (en) * 1949-10-08 1952-08-19 Air Preheater Corrosion control in two-pass regenerative heater
US2680598A (en) * 1950-03-03 1954-06-08 Jarvis C Marble Regenerative heat exchanging apparatus having cooled partition walls
US2809811A (en) * 1950-06-15 1957-10-15 Blomquist Uno Olof Air preheater with heating and tempering means
US2738027A (en) * 1953-06-29 1956-03-13 Apra Precipitator Corp Drawer removal for precipitator electrodes and collectors
DE1143835B (de) * 1955-03-14 1963-02-21 Svenska Rotor Maskiner Ab Regenerativ-Waermeaustauscher mit rotierender, aus zwei im wesentlichen fuer sich selbstaendigen Teilen aufgebauter Speichermasse
US2883160A (en) * 1956-06-18 1959-04-21 Air Preheater Damper for marine heater

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970534A (en) * 1930-01-02 1934-08-14 Air Preheater Method of heat exchange
GB503857A (en) * 1937-10-15 1939-04-17 Howden James & Co Ltd Improvements in regenerative heat-exchangers
US2224787A (en) * 1938-04-14 1940-12-10 Ljungstroms Angturbin Ab Heat exchanger
US2432198A (en) * 1945-01-12 1947-12-09 Air Preheater Heat exchange surface for air preheaters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970534A (en) * 1930-01-02 1934-08-14 Air Preheater Method of heat exchange
GB503857A (en) * 1937-10-15 1939-04-17 Howden James & Co Ltd Improvements in regenerative heat-exchangers
US2224787A (en) * 1938-04-14 1940-12-10 Ljungstroms Angturbin Ab Heat exchanger
US2432198A (en) * 1945-01-12 1947-12-09 Air Preheater Heat exchange surface for air preheaters

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643098A (en) * 1947-07-23 1953-06-23 Shell Dev Heat exchanger
US2666624A (en) * 1950-02-18 1954-01-19 Air Preheater Interlocked seal for rotary regenerative preheaters
US2726849A (en) * 1950-11-23 1955-12-13 Svenska Rotor Maskiner Ab Supporting structure for rotors of regenerative air preheaters
US2797897A (en) * 1951-09-28 1957-07-02 Svenska Rotor Maskiner Ab Support of rotor housing of regenerative heat exchangers
US2789793A (en) * 1952-11-14 1957-04-23 Air Preheater Floating connecting plate for rotary preheater
US2896920A (en) * 1953-06-12 1959-07-28 Carrier Corp Regenerator structure
US2751033A (en) * 1954-01-26 1956-06-19 Jefferson Lake Sulphur Co Fluid treating apparatus
US2812923A (en) * 1954-03-11 1957-11-12 Air Preheater Preheater washing device
US2863723A (en) * 1954-10-21 1958-12-09 Air Preheater Method of recovering heat and sulfur compounds from hot gaseous products of combustion
US2969958A (en) * 1955-03-14 1961-01-31 Svenska Rotor Maskiner Ab Rotary devices, particularly rotary heat exchangers
DE1095978B (de) * 1957-08-10 1960-12-29 Appbau Rothemuehle Dr Brandt & Regenerativer Lufterhitzer mit zylindrischer Tragkonstruktion
US3181602A (en) * 1961-06-05 1965-05-04 Davidson & Co Ltd Heat exchangers
US3327771A (en) * 1965-08-30 1967-06-27 Babcock & Wilcox Co Regenerative heat exchangers
US3874442A (en) * 1972-02-16 1975-04-01 Svenska Rotor Maskiner Ab Pack of heat absorbing material and a support member therefor
JPS5083846A (ja) * 1973-11-28 1975-07-07
JPS584279B2 (ja) * 1973-11-28 1983-01-25 バブコツク日立株式会社 サイセイシキネツコウカンキ
FR2403534A1 (fr) * 1977-09-16 1979-04-13 Wiking Lars Paquet de plaques rectangulaires juxtaposees pour echangeur de chaleur et procede pour sa fabrication
US4209060A (en) * 1977-09-16 1980-06-24 Lars Wiking Pack, comprising a stack of abutting rectangular plates, intended for a regenerative heat exchanger, and a method of manufacturing such a pack
US4383573A (en) * 1982-01-28 1983-05-17 Combustion Engineering, Inc. Rotary regenerative air heater
US4673026A (en) * 1984-10-02 1987-06-16 Eagleair, Inc. Sealing arrangement for air preheater
US4791980A (en) * 1984-10-02 1988-12-20 Eagleair, Inc. Sealing arrangement for air preheater
US4940080A (en) * 1989-07-20 1990-07-10 Reeves & Woodland Industries Bi-directional flexible seal
US5005634A (en) * 1989-07-20 1991-04-09 Reeves Richard L Bi-directional flexible seal
US20090145574A1 (en) * 2007-12-05 2009-06-11 Frank Klisura Self-adjusting seal for a heat exchanger
US20110036536A1 (en) * 2009-08-17 2011-02-17 Paragon Airheater Technologies Full contact flexible seal assembly for heat exchanger
US20110037236A1 (en) * 2009-08-17 2011-02-17 Paragon Airheater Technologies Full contact flexible seal assembly for heat exchanger
US8157266B2 (en) 2009-08-17 2012-04-17 Paragon Airheater Technologies, Inc. Full contact flexible seal assembly for heat exchanger
US8776864B2 (en) 2009-08-17 2014-07-15 Paragon Airheater Technologies, Inc. Full contact flexible seal assembly for heat exchanger
US20130192041A1 (en) * 2012-01-26 2013-08-01 Fernando Treviño HURTADO Forced oscillation seals for air to gas leaks reduction in regenerative air preheaters
US8806750B2 (en) * 2012-01-26 2014-08-19 Fernando Treviño HURTADO Forced oscillation seals for air to gas leaks reduction in regenerative air preheaters

Also Published As

Publication number Publication date
GB587035A (en) 1947-04-11
NL64657C (ja)

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