US3920066A - Regenerative air preheater - Google Patents

Regenerative air preheater Download PDF

Info

Publication number
US3920066A
US3920066A US393432A US39343273A US3920066A US 3920066 A US3920066 A US 3920066A US 393432 A US393432 A US 393432A US 39343273 A US39343273 A US 39343273A US 3920066 A US3920066 A US 3920066A
Authority
US
United States
Prior art keywords
mass
bypass
regenerative
media
hoods
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
US393432A
Other languages
English (en)
Inventor
Franz Josef Kirchhoff
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.)
Apparatebau Rothemuehle Brandt and Kritzler GmbH
Original Assignee
Apparatebau Rothemuehle Brandt and Kritzler GmbH
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 Apparatebau Rothemuehle Brandt and Kritzler GmbH filed Critical Apparatebau Rothemuehle Brandt and Kritzler GmbH
Application granted granted Critical
Publication of US3920066A publication Critical patent/US3920066A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
    • F28D17/04—Distributing arrangements for the heat-exchange media
    • 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
    • Y10S165/037—Heat exchange having a solid heat storage mass for absorbing heat from one fluid and releasing it to another, i.e. regenerator having flow diverting means, e.g. valve to selectively control flow through storage mass
    • Y10S165/038—Correlated control of plural diverting means
    • Y10S165/039—Synchronously rotated flow guiding hoods disposed on opposite sides of fixed regenerator

Definitions

  • FIGS. 1 and 2 show in side section on the line BOA This invention relates to a regenerative air preheater 5 and in plan section on the line CD, respectively, the
  • Air preheatersofithiskind with bypass'd ucts are re quiredmore particularly for. operating ship s boilers. During starting and at light loads the flue gas :andair bypasses are utilised for regulating the cold-end temperature inorder to prevent fluefgases dropping below the dewpoint and to avoid the heating surfaces becoming polluted.
  • FIGS. 1 and 2 show-,in diagrammatic form aknown system of thebypasses (4 and 11,),for fluegasand air in such a regenerative air'pre heater with a vertically disposed cylindrical regenerating chamber.
  • Two air ducts "(4) and two gas ducts (11) are preferably disposed in a symmetrical plan view configuration within the free corner spaces of the square girder frame (13) of the regeneration chamber (1).
  • the bypass ducts (4 and 11) are mounted on the regenerator housing with which they form an integral structural unit.
  • a regenerator is constructed so as to reduce the number of external bypasses which were previously provided and if possible to avoid them altogether.
  • the invention is based on the fact that it can suffice to provide only one true bypass duct for a medium, either for flue gas or for air, in order to regulate the coldend temperature by means of suitably incorporated" regulating elements.
  • a true bypass duct is provided between axial portions of rotatable hoods at each axial end face of a stationary regenerative mass by a passage extending continuously from one face to the other thereby offering a bypass duct past all the regenerative mass, and a centrally disposed variable obturator for the passage, whereby the one of the media normally conducted by means of the hoods through the regenerative mass may be bypassed past it to a predetermined controllable and variable degree.
  • Control of the obturator may be automatic.
  • the obturator may act either just to variably obstruct the bypass passage or may complementarily obstruct the bypass passage or access of the medium to the mass through the hoods.
  • a suitable obturator may be incorporated within the cylindrical core or at one face of the regenerative mass.
  • bypass ducts 4"and 11 are external of the regenerative mass, being mounted within the free corner spaces in the diagonals of the square girder frame 13 on the regenerator housing and forming an integral structural unit therewith.
  • a rotatable hood 6' has a pair of diametrically opposed portions in the shape of sectors of rings for conducting one of the heat exchange media (flue gas or air) to one axial face of the heat exchange elements 7 of the regenerative mass in the stationary chamber 1.
  • a hood8' takes flue gas or air from the other axial face of the mass.
  • the regenerative mass has, however, a hollow core 12 about a central shaft 15 for the hoods, and offers a exchange elements.
  • a variable obturator 14 is provided at one end of the passage, centrally of the mass and of the hood 6'. It is formed of a plurality of flaps able to be driven to the limit position shown in full linesin FIG.
  • each of the hoods 6', 8' is in communication with the hollow core 12.
  • the flaps 14 may in certain circumstances be automatically applied, for example by means of thermal expansion rods indicated at 20 which adjust the flaps relacontrol the ratio of gas or air passing through the bypass to that passing through the heat exchange elements 7.
  • a variable obturator I6 is provided inside the core in the form of a choke formed by a valve plate rotatable about an axis normal to that of the shaft whereby variability to obstruct the bypass passage.
  • Total shut-off valve means 19 may be provided in the gas or air inlet duct 5.
  • the obturator 16 may be operated through manual controls or automatically, as indicated above.
  • the dash-dot line shows an external bypass 20 for the medium not passing through the hoods.
  • This second bypass permits both media to bypass that outer portion of the regenerating chamber which is filled with heatexchange elements, for example in the event of total blockage of the mass.
  • a regenerative air preheater with a stationary regenerative mass having two end faces, two hoods rotatable about an axis over each said end face respectively to communicate one of the heat-exchange media to and from the mass, and a bypass for at least one of the media
  • the improvement comprising a hollow core of the mass at the axis of rotation of the hoods and extending continuously from end face to end face of the mass and forming a gas-passing bypass duct completely through the axial length of the mass, a central portion of each of the two hoods communicable with an end of the bypass duct, and variable obturator means operable to vary the relative amounts of flow to the said one of the media through the mass and through the bypass duct wherein said obturator means comprises movable flaps at one end of the duct and operable also positively to prevent flow through one of the mass and the bypass duct.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)
US393432A 1972-09-01 1973-08-31 Regenerative air preheater Expired - Lifetime US3920066A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7232317 1972-09-01

Publications (1)

Publication Number Publication Date
US3920066A true US3920066A (en) 1975-11-18

Family

ID=6632430

Family Applications (1)

Application Number Title Priority Date Filing Date
US393432A Expired - Lifetime US3920066A (en) 1972-09-01 1973-08-31 Regenerative air preheater

Country Status (4)

Country Link
US (1) US3920066A (enrdf_load_stackoverflow)
DK (1) DK132721C (enrdf_load_stackoverflow)
FR (1) FR2198111B3 (enrdf_load_stackoverflow)
GB (1) GB1431289A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227375A (en) * 1977-08-30 1980-10-14 Leo Tompkins Desiccant thermal energy storage system for compact heating and cooling
US4250866A (en) * 1979-09-10 1981-02-17 Research Institute For Advanced Technology Thermal energy storage to increase furnace efficiency
US20090320808A1 (en) * 2006-07-25 2009-12-31 Valeo Systemes De Controle Moteur Valve with bypass duct incorporating a heating member and combustion engine intake circuit with preheating of the air

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3140406C2 (de) * 1981-10-12 1985-03-07 Apparatebau Rothemühle Brandt + Kritzler GmbH, 5963 Wenden Regenerativ-Wärmeaustauscher zur getrennten Aufwärmung zweier parallel geführter Ströme eines wärmeaufnehmenden Mediums durch ein wärmeabgebendes Medium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227375A (en) * 1977-08-30 1980-10-14 Leo Tompkins Desiccant thermal energy storage system for compact heating and cooling
US4250866A (en) * 1979-09-10 1981-02-17 Research Institute For Advanced Technology Thermal energy storage to increase furnace efficiency
US20090320808A1 (en) * 2006-07-25 2009-12-31 Valeo Systemes De Controle Moteur Valve with bypass duct incorporating a heating member and combustion engine intake circuit with preheating of the air
US8479714B2 (en) * 2006-07-25 2013-07-09 Valeo Systems De Controle Moteur Valve with bypass duct incorporating a heating member and combustion engine intake circuit with preheating of the air

Also Published As

Publication number Publication date
DK132721B (da) 1976-01-26
FR2198111B3 (enrdf_load_stackoverflow) 1976-07-30
FR2198111A1 (enrdf_load_stackoverflow) 1974-03-29
GB1431289A (en) 1976-04-07
DK132721C (da) 1976-06-14

Similar Documents

Publication Publication Date Title
US5526651A (en) Open cycle desiccant cooling systems
US2363870A (en) Temperature control of heat transfer surfaces
US4948392A (en) Heat input for thermal regenerative desiccant systems
US2803439A (en) Heating and cooling apparatus
US5915340A (en) Variable sector plate quad sector air preheater
US3018088A (en) Room unit for air conditioning
US3920066A (en) Regenerative air preheater
US2347857A (en) Temperature zoned air preheater
US4114680A (en) Regenerative air preheater for separate preheating of two or more air-or gas streams
US3634026A (en) Apparatus and method thermal regenerative gas processing
US3786868A (en) Self-compensating sector plate
US2684230A (en) End plate support in housing of regenerative heat exchange apparatus
US2607564A (en) Corrosion control in two-pass regenerative heater
US3799242A (en) Regenerative air heater with reversible drive
US2913228A (en) Rotating regenerative air preheater for excessive air heating
US2673718A (en) Rotary air preheater with cooling means
US2809811A (en) Air preheater with heating and tempering means
US2858110A (en) Regenerative heat exchanger
US3246687A (en) Thermal actuated sector plate
US3481392A (en) Tempering duct for rotary regenerative heat exchanger
US3095036A (en) Thermal actuated radial seal for rotary regenerative heat exchanger
US2295991A (en) Heat exchange apparatus
CA1131615A (en) Leakage control for preheater
US3242976A (en) Regenerative heat exchanger
US2060290A (en) Heat recovery system