EP0105990A1 - Schwingungsdämpfungsystem für Kessel - Google Patents

Schwingungsdämpfungsystem für Kessel Download PDF

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Publication number
EP0105990A1
EP0105990A1 EP82305493A EP82305493A EP0105990A1 EP 0105990 A1 EP0105990 A1 EP 0105990A1 EP 82305493 A EP82305493 A EP 82305493A EP 82305493 A EP82305493 A EP 82305493A EP 0105990 A1 EP0105990 A1 EP 0105990A1
Authority
EP
European Patent Office
Prior art keywords
chamber
assembly
gas
flow
baffle
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.)
Withdrawn
Application number
EP82305493A
Other languages
English (en)
French (fr)
Inventor
Kerry Patrick Byrne
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.)
International Combustion Australia Ltd
Original Assignee
International Combustion Australia Ltd
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 International Combustion Australia Ltd filed Critical International Combustion Australia Ltd
Priority to EP82305493A priority Critical patent/EP0105990A1/de
Publication of EP0105990A1 publication Critical patent/EP0105990A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to boilers and more particularly to the damping of vibration which occurs within boilers.
  • the method of controlling flow excited vibrations is to insert single or multiple baffles between the tubes of the bank depending on the harmonics of the standing wave formation, however it is a disadvantage of this method that it is generally expensive as the multiple baffles must be installed in all the tube banks where resonant vibration occurs.
  • This invention replaces the multiple baffles with a single baffle.
  • a boiler assembly including a chamber within which combustion takes place or burnt gases are ducted, a plurality of tube banks extending across a chamber in a direction generally transverse of the direction of flow of gases through the chamber, and vibration absorption means extending within a plane which is normal to the tube banks but parallel to the direction of flow of gas through the chamber.
  • FIG 1 there is schematically depicted a wall 10 of a chamber through which gas 11 is passed to heat the bank 12 of pipes 13.
  • the pipes 13 extend generally transverse of the direction of gas flow 11 and accordingly the pipes 13 create vortices 14 in the gas 13 which may be shed in phase. If the shedding frequency corresponds to a natural frequency of the gas column, extending transverse of the gas flow 11, then the chamber wall 10 will be caused to vibrate.
  • Figure 2 which depicted natural frequencies are the most likely frequencies to occur upon consideration of the flow conditions particularly with reference to the Reynolds number and Strouhal number.
  • baffle 16 By providing a single vibration absorbing baffle 16 at a location remote from each node 15, energy will be absorbed thereby inhibiting vibration of the chamber walls 10 and the creation of a transverse oscillating gas column.
  • a preferred location of the baffle is at a position wherein the baffle is remote from each of the nodes 15 depicted in Figure 2.
  • the baffle 16 would extend in a direction generally parallel to the flow of gas 11 while being generally located in a plane extending generally normal to the direction of extension of the pipes 13.
  • the baffle 16 is located at a position of significant gas movement irrespective of the particular transverse frequency given that the possibility of higher frequencies occurring is very small.
  • the baffle 16 could be formed of fibrous material so as to provide good absorption properties in use.
  • the absorption baffle 16 could be formed of a single perforated plate which would perform the same function as the absorption baffle 16 formed of fibrous material but with the advantage of longer life due to the lack of infill material which may degrade or become filled with dust after a period of time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP82305493A 1982-10-15 1982-10-15 Schwingungsdämpfungsystem für Kessel Withdrawn EP0105990A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP82305493A EP0105990A1 (de) 1982-10-15 1982-10-15 Schwingungsdämpfungsystem für Kessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82305493A EP0105990A1 (de) 1982-10-15 1982-10-15 Schwingungsdämpfungsystem für Kessel

Publications (1)

Publication Number Publication Date
EP0105990A1 true EP0105990A1 (de) 1984-04-25

Family

ID=8189810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82305493A Withdrawn EP0105990A1 (de) 1982-10-15 1982-10-15 Schwingungsdämpfungsystem für Kessel

Country Status (1)

Country Link
EP (1) EP0105990A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2715235A4 (de) * 2011-05-26 2014-11-05 Valmet Power Oy Kessel und schalldämpfer für einen rauchgaskanal in einem kessel
CN120740347A (zh) * 2025-08-25 2025-10-03 陕西志羽时代节能科技有限公司 一种适用于高压工况的列管换热器交换系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE523150C (de) * 1930-02-08 1931-04-20 Albert Klein Dr Ing Vorrichtung zur Schalldaempfung in Leitungen
GB1056734A (en) * 1964-06-17 1967-01-25 Combustion Eng A gas pass of rectangular cross-section having provisions for eliminating vibrations
DE1776104A1 (de) * 1968-09-21 1971-09-16 Babcock & Wilcox Ag Trennwand zur Vermeidung von Gasschwingungen in Dampferzeugern
FR2214855A1 (de) * 1973-01-22 1974-08-19 Aerospatiale
US4226279A (en) * 1978-08-15 1980-10-07 Foster Wheeler Energy Corporation Method of suppressing formation of heat exchange fluid particles into standing waves
DE2920278A1 (de) * 1979-05-18 1981-01-29 Kuehnle Kopp Kausch Ag Verfahren und einrichtung zur schalldaempfung in insbesondere gasfoermigen ausbreitungsmedien

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE523150C (de) * 1930-02-08 1931-04-20 Albert Klein Dr Ing Vorrichtung zur Schalldaempfung in Leitungen
GB1056734A (en) * 1964-06-17 1967-01-25 Combustion Eng A gas pass of rectangular cross-section having provisions for eliminating vibrations
DE1776104A1 (de) * 1968-09-21 1971-09-16 Babcock & Wilcox Ag Trennwand zur Vermeidung von Gasschwingungen in Dampferzeugern
FR2214855A1 (de) * 1973-01-22 1974-08-19 Aerospatiale
US4226279A (en) * 1978-08-15 1980-10-07 Foster Wheeler Energy Corporation Method of suppressing formation of heat exchange fluid particles into standing waves
DE2920278A1 (de) * 1979-05-18 1981-01-29 Kuehnle Kopp Kausch Ag Verfahren und einrichtung zur schalldaempfung in insbesondere gasfoermigen ausbreitungsmedien

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2715235A4 (de) * 2011-05-26 2014-11-05 Valmet Power Oy Kessel und schalldämpfer für einen rauchgaskanal in einem kessel
US9389001B2 (en) 2011-05-26 2016-07-12 Valmet Technologies Oy Boiler, and a silencer for a flue gas duct in a boiler
CN120740347A (zh) * 2025-08-25 2025-10-03 陕西志羽时代节能科技有限公司 一种适用于高压工况的列管换热器交换系统

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19841226

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BYRNE, KERRY PATRICK