EP0105990A1 - Schwingungsdämpfungsystem für Kessel - Google Patents
Schwingungsdämpfungsystem für Kessel Download PDFInfo
- 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- Withdrawn
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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)
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 (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2715235A1 (de) * | 2011-05-26 | 2014-04-09 | Metso Power OY | Kessel und schalldämpfer für einen rauchgaskanal in einem kessel |
Citations (6)
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 |
-
1982
- 1982-10-15 EP EP82305493A patent/EP0105990A1/de not_active Withdrawn
Patent Citations (6)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2715235A1 (de) * | 2011-05-26 | 2014-04-09 | Metso Power OY | Kessel und schalldämpfer für einen rauchgaskanal in einem kessel |
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 |
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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 |