EP0303047B1 - Circuit d'échappement des fumées pour une installation d'épuration de fumées - Google Patents

Circuit d'échappement des fumées pour une installation d'épuration de fumées Download PDF

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Publication number
EP0303047B1
EP0303047B1 EP88110821A EP88110821A EP0303047B1 EP 0303047 B1 EP0303047 B1 EP 0303047B1 EP 88110821 A EP88110821 A EP 88110821A EP 88110821 A EP88110821 A EP 88110821A EP 0303047 B1 EP0303047 B1 EP 0303047B1
Authority
EP
European Patent Office
Prior art keywords
flow
exhaust gas
flow guide
glass panes
guide elements
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
EP88110821A
Other languages
German (de)
English (en)
Other versions
EP0303047A3 (en
EP0303047A2 (fr
Inventor
Dietmar Dipl.-Ing. Kallinich
Wolfgang Dipl.-Phys. Kahlert
Peter Dipl.-Ing. Thom
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.)
Flachglas Wernberg GmbH
Veba Kraftwerke Ruhr AG
Original Assignee
Flachglas Wernberg GmbH
Veba Kraftwerke Ruhr 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 Flachglas Wernberg GmbH, Veba Kraftwerke Ruhr AG filed Critical Flachglas Wernberg GmbH
Priority to AT88110821T priority Critical patent/ATE68047T1/de
Publication of EP0303047A2 publication Critical patent/EP0303047A2/fr
Publication of EP0303047A3 publication Critical patent/EP0303047A3/de
Application granted granted Critical
Publication of EP0303047B1 publication Critical patent/EP0303047B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/02—Influencing flow of fluids in pipes or conduits
    • F15D1/04—Arrangements of guide vanes in pipe elbows or duct bends; Construction of pipe conduit elements for elbows with respect to flow, e.g. for reducing losses of flow
    • 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 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/081—Air-flow control members, e.g. louvres, grilles, flaps or guide plates for guiding air around a curve
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31—Surface property or characteristic of web, sheet or block
    • Y10T428/315—Surface modified glass [e.g., tempered, strengthened, etc.]

Definitions

  • the invention relates to a flow channel for the flue gases to be treated and / or treated in a flue gas cleaning system with flow guiding elements which have curved flow guiding surfaces.
  • the invention relates to a flow channel for the flue gases of a flue gas cleaning system behind a boiler furnace, in particular a power station boiler furnace.
  • Such flow channels consist of sheet metal and usually have a rectangular or square flow cross-section (GB-A-598 928).
  • the term flow channel not only denotes a pipeline, but also apparatus and apparatus parts through which flow occurs, in particular inlet apparatus for the gas to be cleaned and outlet apparatus for the cleaned gas from washing towers for wet flue gas cleaning.
  • the flow control elements In the wet flue gas cleaning of flue gases behind boiler furnaces, special requirements are placed on the flow control elements.
  • the flow guiding elements have to be able to cope with the requirements in mechanical terms with regard to the fatigue strength, even under temperature changes.
  • the flow guiding elements have to withstand the considerable chemical and electrochemical corrosion stresses that occur because those that are to be cleaned but also those that are cleaned Bring flue gases with corrosive components.
  • there are abrasive stresses because the gases mentioned carry fine-grained solids that also tend to settle on the flow guide surfaces - which in turn can lead to the formation of corrosion-promoting microelements.
  • the flow resistance of the flow guiding elements must be sufficiently small if energy losses that can otherwise be avoided have to be accepted.
  • the flow guiding elements consist of sheet metal. Because of the corrosive loads, high-quality austenitic chrome sheets or chrome / nickel sheets are used. The service life is nonetheless unsatisfactory. It is often less than 2000 operating hours. The surface roughness is relatively large. Because of the surface roughness, the flow resistance is disturbingly high, while the rough surface also promotes the growth of solid particles from the gases. In addition, corrosive stress potentials are formed between the flow guide elements with the relatively noble alloy components and the metallic material of the flow channels, which mostly consist of conventional structural steel.
  • the invention has for its object to provide a flow channel in which the flow guide elements are characterized by practically unlimited service life and low flow resistance.
  • the invention teaches that the flow guide elements are designed to be self-supporting as curved and prestressed flat glass panes, which are subjected to mechanical compressive stress transversely to the direction of flow in the installed state and have a surface roughness of a few thousandths of a millimeter at least in the area of the curved flow guide surfaces.
  • the glass panes are held at their lateral edge on the walls of the flow channels, for which purpose the various mechanical aids are available, for example inserts, supports and the like.
  • the various mechanical aids are available, for example inserts, supports and the like.
  • the flow guide elements designed or arranged as self-supporting glass panes there is a design specification, especially with regard to the thickness of the glass panes.
  • all thermal stresses that occur in particular also thermal cycling stresses and the thermal stresses that result from the fact that the installed glass panes can have inhomogeneous temperatures over their surface during operation of a flue gas cleaning system, are also recorded. This can be achieved by appropriate installation measures.
  • the flow resistance is surprisingly low because the glass panes have a surface roughness of a few thousandths of a millimeter, at least in the area of the flow guide surfaces. Surprisingly, with such a device for surface roughness there is hardly any risk of solids growing out of the flue gases.
  • glass panes which form the flow guide elements can be used individually and can only be assembled to form an aggregate of flow guide elements when the flow gap is inserted. It goes without saying that the individual glass panes can also be individually interchangeable.
  • a preferred embodiment of the invention which is distinguished in terms of assembly technology, is characterized in that the glass panes are combined to form flow guide element packages to form a flow gap and are interchangeably installed in the flow channel in packages.
  • all glass panes can be of the same size or can also be made larger as the radius of curvature increases, a design which is based on the flow technology Points of view.
  • the glass panes can also be bent to flow guide elements, which in turn follow a special aerodynamic profile.
  • the term glass pane also includes so-called laminated glass panes.
  • the flow guide elements designed as glass panes have a practically unlimited service life. They are also characterized by low flow resistance and can show growth of solid particles that carry the gases. If, particularly in the slipstream area, growth occurs on the flow guide elements, they can be easily washed off.
  • the flow channels 1 shown in the figures are used to guide the treated and / or treated flue gas of a flue gas cleaning system, which in turn is behind a boiler firing, for. B. is arranged behind a power plant boiler.
  • the flow channel has a rectangular flow cross section and flow guide elements 2.
  • the flow channel 1 is guided as a bend or knee and the flow guide elements 2 are installed in this area. They have curved flow guide surfaces 3.
  • the flow guide elements are designed as curved glass panes 2 made of a glass from the group specified above, specifically designed and installed in a self-supporting manner.
  • the glass panes 2 are prestressed, in the way it is common for single-pane safety glass panes, which are used in particular as motor vehicle window panes.
  • the glass panes 2 are subjected to a mechanical compressive prestress transversely to the direction of flow, by means of appropriate installation measures.
  • the double arrows 4 illustrate this pressure bias.
  • the glass panes 2 have a very low surface roughness.
  • the glass panes 2 of the exemplary embodiment form a flow guide element packet 5, but forming a flow gap.
  • the brackets not shown for the glass panes 2 are set up accordingly.
  • the individual glass panes 2 of the flow guide element packet 5 have different sizes in the flow direction.
  • all the glass panes 2 of the flow guide element package 5 are of the same size.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Treating Waste Gases (AREA)
  • Hydrogen, Water And Hydrids (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Sampling And Sample Adjustment (AREA)

Claims (3)

  1. Canal d'écoulement pour les gaz de fumée devant être traités et/ou les gaz de fumées traités, d'une installation d'épuration des gaz de fumée, comportant des éléments (2) de guidage de l'écoulement, qui possèdent des surfaces coudées (3) de guidage de l'écoulement, caractérisé en ce que les éléments de guidage de l'écoulement sont réalisés de manière à être autoportants sous la forme de plaques de verre lisses (2), en soit précontraintes, qui, à l'état monté, sont soumises à une précontrainte mécanique de compression transversalement par rapport à la direction d'écoulement et possèdent, au moins au niveau des surfaces coudées (3) de guidage de l'écoulement, une rugosité de surface de quelques millièmes de millimètre.
  2. Canal d'écoulement selon la revendication 1, caractérisé en ce que les plaques de verre (2) sont réunies, en délimitant des lentes d'écoulement, pour former des paquets (5) d'éléments de guidage de l'écoulement et sont montés, de manière à pouvoir être échangés par paquets, dans le canal d'écoulement (1).
  3. Canal d'écoulement selon la revendication 2, caractérisé en ce que toutes les plaques de verre (2) d'un paquet (5) d'éléments de guidage de l'écoulement possèdent des dimensions identiques.
EP88110821A 1987-08-08 1988-07-07 Circuit d'échappement des fumées pour une installation d'épuration de fumées Expired - Lifetime EP0303047B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88110821T ATE68047T1 (de) 1987-08-08 1988-07-07 Stroemungskanal fuer die rauchgase einer rauchgasreinigungsanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3726492 1987-08-08
DE3726492A DE3726492C1 (de) 1987-08-08 1987-08-08 Stroemungskanal fuer die Rauchgase einer Rauchgasreinigungsanlage

Publications (3)

Publication Number Publication Date
EP0303047A2 EP0303047A2 (fr) 1989-02-15
EP0303047A3 EP0303047A3 (en) 1989-07-05
EP0303047B1 true EP0303047B1 (fr) 1991-10-02

Family

ID=6333401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88110821A Expired - Lifetime EP0303047B1 (fr) 1987-08-08 1988-07-07 Circuit d'échappement des fumées pour une installation d'épuration de fumées

Country Status (6)

Country Link
US (1) US4919170A (fr)
EP (1) EP0303047B1 (fr)
JP (1) JPH0621685B2 (fr)
AT (1) ATE68047T1 (fr)
DE (1) DE3726492C1 (fr)
DK (1) DK163743C (fr)

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Also Published As

Publication number Publication date
ATE68047T1 (de) 1991-10-15
EP0303047A3 (en) 1989-07-05
DK163743B (da) 1992-03-30
JPH01147212A (ja) 1989-06-08
US4919170A (en) 1990-04-24
JPH0621685B2 (ja) 1994-03-23
DK437888A (da) 1989-02-09
DE3726492C1 (de) 1988-11-10
DK437888D0 (da) 1988-08-05
DK163743C (da) 1992-08-24
EP0303047A2 (fr) 1989-02-15

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