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US3265040A - Combustion gas stack for steam generating plant - Google Patents

Combustion gas stack for steam generating plant Download PDF

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Publication number
US3265040A
US3265040A US410128A US41012864A US3265040A US 3265040 A US3265040 A US 3265040A US 410128 A US410128 A US 410128A US 41012864 A US41012864 A US 41012864A US 3265040 A US3265040 A US 3265040A
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US
United States
Prior art keywords
stack
combustion gas
tubes
partitions
streaming
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
US410128A
Other languages
English (en)
Inventor
Chen Yian-Nian
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.)
Sulzer AG
Original Assignee
Sulzer AG
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 Sulzer AG filed Critical Sulzer AG
Application granted granted Critical
Publication of US3265040A publication Critical patent/US3265040A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes or flue ways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/16—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/40—Arrangements of partition walls in flues of steam boilers, e.g. built-up from baffles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J11/00—Devices for conducting smoke or fumes, e.g. flues

Definitions

  • the present invention pertains to a combustion gas stack for a steam generator in which stack there are provided tubes, e.g. those of an economizer, which extend transversely of the direction of streaming of the combustion gases.
  • tubes e.g. those of an economizer
  • the oscillations of the gases may in turn provoke oscillation of the stack walls and of the tubes themselves, which generates undesirable noise and which may even cause damage to the tubes.
  • This object is achieved in accordance with the invention by dividing the stack into at least two zones traversed one after the other by the combustion gases, these zones including each at least one wall or partition extending parallel to the direction of gas streaming and to the length of the tubes, with the partitions of adjacent zones being staggered or displaced with respect to each other, as in the cross section of the stack.
  • each zone possesses transversely of the direction of gas streaming a natural frequency of oscillation widely or discontinuously different from that of the other zones, so that no unitary or massive oscillation of the gases occurs capable of setting into vibration the walls of the stack and the tubes therein. the desired result is obtained with extremely simple means.
  • FIG. 1 is a longitudinal section through a vertically disposed combustion gas stack of a steam generator
  • FIG. 2 is a simplified cross-sectional view taken on the line A-B of FIG. 1;
  • FIGS. 3 and 4 represent simplified longitudinal sections similar to that of FIG. 1 but illustrating other embodiments of the invention.
  • reference character 1 identifies a generally vertical combustion gas stack which connects at the upper and left end thereof with the firing space or chamber (not shown) of a steam generator.
  • the lower end of the stack connects via a channel 2 to a chimney 3 not shown in detail.
  • the combustion gases emerging from the firing chamber flow in the direction of arrows 4 and 5 through the structure shown in FIG. 1.
  • heating surfaces for the transfer of heat to the working substance of the boiler. These surfaces normally take the form of tubes through which there flows (in the usual case) water or steam.
  • a single such surface 6 which may constitute a supplementary superheater or a reheater.
  • tubular coils 7 of an economizer of which again for simplicitys sake only a few are shown in the drawing.
  • the coils 7 extend in substantially vertical planes perpendicular to the plane of the figure and they substantially fill the crosssection of the stack over a height H.
  • H This constitutes the space in which there may arise combustion gas oscillations transversely of the tubes, generated by Karmantype turbulences, such oscillations being capable of setting the walls of the stack itself into oscillation.
  • the gas oscillations may moreover set the tubes 7 into oscillations directed transversely of the axis of the tubes.
  • the development of such oscillations is prevented by dividing the space H occupied by the tubes into a plurality of zones transversed by the combustion gases successively and to which zones discontinuously dilferent natural frequencies of oscillation are imparted by means of suitably positioned partitions extending parallel to the direction of gas streaming.
  • the zone H is divided into two equal zones H and H provided with such partitions 8 and 8.
  • the partitions 8 and 8' are disposed at unlike spacings a and b (FIG. 2) from the longitudinal axial plane L of the stack, which plane may be considered to be the plane which bisects the stack longitudinally and which extends parallel to the length of the tubes 7.
  • the partitions 8 and 8 extend 'over the full depth of the stack as shown in FIG. 2, and their length in the direction of gas streaming is substantially equal to that of their respective zones.
  • the lower edge of the partition 8 and the upper edge of the partition 8' are disposed at substantially the same position longitudinally of the stack in the direction of gas streaming.
  • the invention prevents the generation of disturbing oscillations with a minimum of expense and material.
  • the invention operates by detuning in each zone with respect to every other zone the natural acoustic frequency of oscillation of the exhaust gases in directions transversely to the axis of the tubes and transversely to the direction of gas streaming.
  • the partitions 8 and 8' may partly overlap in the direction of combustion gas streaming, as illustrated in FIG. 3.
  • the range e of overlapping may then be considered as a further zone in accordance with the invention, the stack being in such case divided into three zones.
  • FIG. 4 shows an additional zone with a partition 8" spaced at a distance 0 from the longitudinal axis L of the stack, this spacing 0 being again different from the spacings a and b which separate the partitions 8 and 8 from the longitudinal axis L respectively.
  • the length of the partitions 8, 8' and 8" measured in the direction of gas streaming should be some 5 to 20 percent of the total length Z of the stack. It is not necessary that the zones H and H be of the same magnitude; they may be unlike.
  • a steam generator combustion gas stack comprising stack walls, tubes extending across the stack between said walls in a direction transverse to the direction of combustion gas streaming through the stack, and a plurality of partitions disposed within the stack at positions successively traversed by the gases in streaming through the stack, said partitions extending parallel to the direction of gas streaming and to the length of said tubes, adjacent of said partitions having unlike spacings from said stack walls.
  • a steam generator combustion gas stack comprising stack walls, tubes extending across the stack between said walls in a direction transverse to the direction of combustion gas streaming through the stack, and a plurality of partitions disposed within the stack at positions successively traversed by the gases in streaming through the stack, said partitions extending parallel to the direction of gas streaming and to the length of said tubes, adjacent of said partitions having unlike spacings from a plane bisecting said stack longitudinally and extending parallel to the length of said tubes.
  • a steam generator combustion gas stack comprising stack walls, tubes extending across the stack between said walls in a direction transverse to the direction of combustion gas streaming through the stack, and a plurality of partitions disposed within the stack at positions successively traversed by the gases in streaming through the stack, said partitions extending parallel to the direction of gas streaming and to the length of said tubes, adjacent of said partitions having a partly overlapping relation longitudinally of the stack and having unlike spacings from the stack walls.
  • a steam generator combustion gas stack comprising means defining stack walls, tubes extending between opposite of said walls in directions transverse to the direction of combustion gas streaming through the stack, and a plural'ty of partitions disposed within the portion of the stack occupied by said tubes at positions successively traversed by the gases in streaming through the stack, said partitions extending lengthwise of the direction of gas streaming and of the length of said tubes, adjacent of said partitions being non-coplanar.
  • a steam generator combustion gas stack comprising means defining a gas flow space having a longitudinal axis substantially parallel to the direction of streaming of gases through said space, tubes disposed in said space and extending transversely of said axis, and a plurality of partitions disposed in said space longitudinally opposite said tubes, said partitions extending substantially parallel to said tubes and to said axis, adjacent of said partitions longitudinally of said axis having unlike spacings from said axis.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Treating Waste Gases (AREA)
US410128A 1963-11-18 1964-11-10 Combustion gas stack for steam generating plant Expired - Lifetime US3265040A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1419963A CH412168A (de) 1963-11-18 1963-11-18 Rauchgaszug eines Dampferzeugers

Publications (1)

Publication Number Publication Date
US3265040A true US3265040A (en) 1966-08-09

Family

ID=4398754

Family Applications (1)

Application Number Title Priority Date Filing Date
US410128A Expired - Lifetime US3265040A (en) 1963-11-18 1964-11-10 Combustion gas stack for steam generating plant

Country Status (5)

Country Link
US (1) US3265040A (es)
BE (1) BE655900A (es)
CH (1) CH412168A (es)
ES (1) ES306003A1 (es)
GB (1) GB1014169A (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386395A (en) * 1966-12-14 1968-06-04 Vapor Corp Combustion noise eliminator
US4226279A (en) * 1978-08-15 1980-10-07 Foster Wheeler Energy Corporation Method of suppressing formation of heat exchange fluid particles into standing waves
US4316435A (en) * 1980-02-27 1982-02-23 General Electric Company Boiler tube silencer
US4494467A (en) * 1982-04-19 1985-01-22 Daniel Berman Apparatus and technique for combustion of methanol or similar fuels
US5318109A (en) * 1991-11-20 1994-06-07 Kabushiki Kaisha Toshiba Heat exchange apparatus
US20150122201A1 (en) * 2011-12-21 2015-05-07 Sandvik Intellectual Property Ab Steam boiler comprising a radiation element

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2699264B1 (fr) * 1992-12-15 1995-01-20 Babcock Entreprise Echangeur de chaleur muni d'un système anti-érosion.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893509A (en) * 1956-03-28 1959-07-07 Combustion Eng Vibration free apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893509A (en) * 1956-03-28 1959-07-07 Combustion Eng Vibration free apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386395A (en) * 1966-12-14 1968-06-04 Vapor Corp Combustion noise eliminator
US4226279A (en) * 1978-08-15 1980-10-07 Foster Wheeler Energy Corporation Method of suppressing formation of heat exchange fluid particles into standing waves
US4316435A (en) * 1980-02-27 1982-02-23 General Electric Company Boiler tube silencer
US4494467A (en) * 1982-04-19 1985-01-22 Daniel Berman Apparatus and technique for combustion of methanol or similar fuels
US5318109A (en) * 1991-11-20 1994-06-07 Kabushiki Kaisha Toshiba Heat exchange apparatus
US20150122201A1 (en) * 2011-12-21 2015-05-07 Sandvik Intellectual Property Ab Steam boiler comprising a radiation element

Also Published As

Publication number Publication date
BE655900A (es) 1965-05-18
CH412168A (de) 1966-04-30
ES306003A1 (es) 1965-04-01
GB1014169A (en) 1965-12-22

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