EP0303047B1 - Exhaust gas flue for an exhaust gas purification plant - Google Patents

Exhaust gas flue for an exhaust gas purification plant 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
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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
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German (de)
French (fr)
Other versions
EP0303047A3 (en
EP0303047A2 (en
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
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Publication date
Application filed by Flachglas Wernberg GmbH, Veba Kraftwerke Ruhr AG filed Critical Flachglas Wernberg GmbH
Priority to AT88110821T priority Critical patent/ATE68047T1/en
Publication of EP0303047A2 publication Critical patent/EP0303047A2/en
Publication of EP0303047A3 publication Critical patent/EP0303047A3/en
Application granted granted Critical
Publication of EP0303047B1 publication Critical patent/EP0303047B1/en
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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.

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  • 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)
  • Sampling And Sample Adjustment (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Exhaust gas flue for the exhaust gases, which are to be treated and/or have been treated, of an exhaust gas purification plant with flow guide elements, in particular in the region of a bend or of a knee, the flow guide elements having curved flow guide surfaces. The flow guide elements are designed to be self-supporting in the form of curved glass sheets. The glass sheets can themselves be pre-tensioned. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Strömungskanal für die zu behandelnden und/oder behandelten Rauchgase einer Rauchgasreinigungsanlage mit Strömungsleitelementen, die gebogene Strömungsleitflächen aufweisen. Insbesondere bezieht sich die Erfindung auf einen Strömungskanal für die Rauchgase einer Rauchgasreinigungsanlage hinter einer Kesselfeuerung, insbesondere einer Kraftwerkskesselfeuerung. Solche Strömungskanäle bestehen regelmäßig aus Blech und besitzen zumeist einen rechteckigen oder quadratischen Strömungsquerschnitt (GB-A-598 928). - Der Begriff Strömungskanal bezeichnet im Rahmen der Erfindung nicht lediglich eine Rohrleitung, sondern auch durchströmte Apparate und Apparateteile, insbesondere Eintrittsapparate für das zu reinigende Gas und Austrittsapparate für das gereinigte Gas von Waschtürmen für die nasse Rauchgasreinigung.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. In particular, 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). - In the context of the invention, 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.

Bei der nassen Rauchgasreinigung von Rauchgasen hinter Kesselfeuerungen werden an die Strömungsleitelemente besondere Anforderungen gestellt. Einerseits müssen die Strömungsleitelemente in mechanischer Hinsicht in bezug auf die Dauerstandfestigkeit, auch unter Temperaturwechselbeanspruchungen, den Anforderungen gewachsen sein. Andererseits müssen die Strömungsleitelemente den erheblichen chemischen und elektrochemischen Korrosionsbeanspruchungen wiederstehen, die auftreten, weil die zu reinigenden, aber auch die gereinigten Rauchgase korrosive Bestandteile mitführen. Hinzu kommen abrasive Beanspruchungen, weil die genannten Gase feinkörnige Feststoffe mitführen, die auch dazu neigen, sich auf den Strömungsleitflächen festzusetzen - was wiederum zur Bildung von korrosionsfördernden Mikroelementen führen kann. Endlich muß der Strömungswiderstand der Strömungsleitelemente ausreichend klein sein, wenn anders vermeidbare Energieverluste in Kauf genommen werden müssen.In the wet flue gas cleaning of flue gases behind boiler furnaces, special requirements are placed on the flow control elements. On the one hand, 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. On the other hand, 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. In addition, 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. Finally, the flow resistance of the flow guiding elements must be sufficiently small if energy losses that can otherwise be avoided have to be accepted.

Bei den (aus der Praxis) bekannten Strömungskanälen des beschriebenen Aufbaus sowie der beschriebenen Zweckbestimmung bestehen die Strömungsleitelemente aus Blech. Wegen der korrosiven Beanspruchungen wird mit hochwertigen austenitischen Chromblechen oder Chrom/Nickel-Blechen gearbeitet. Die Standzeit ist nichtsdestoweniger unbefriedigend. Sie liegt häufig unter 2000 Betriebsstunden. Die Oberflächenrauhigkeit ist verhältnismäßig groß. Wegen der Oberflächenrauhigkeit ist der Strömungswiderstand störend groß, während darüber hinaus die rauhe Oberfläche das Anwachsen von Feststoffteilchen aus den Gasen fördert. Darüber hinaus bilden sich korrodierend wirkende Spannungspotentiale zwischen den Strömungsleitelementen mit den verhältnismäßig edlen Legierungsbestandteilen und dem metallischen Werkstoff der Strömungskanäle, die zumeist aus üblichem Baustahl bestehen. Um die Standzeit zu verbessern, ist es bekannt, die Strömungsleitelemente mit Schutzschichten aus beispielsweise Polytetrafluoräthylen oder anderen Werkstoffen zu überziehen, jedoch erreicht man auf diese Weise aus den verschiedensten Gründen keine beachtliche Verbesserung der Standzeit der Strömungsleitelemente.In the flow channels of the construction described and from the purpose described (known from practice), 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. In order to improve the service life, it is known to coat the flow guide elements with protective layers made of, for example, polytetrafluoroethylene or other materials, but for a variety of reasons this does not result in a considerable improvement in the service life of the flow guide elements.

Der Erfindung liegt die Aufgabe zugrunde, einen Strömungskanal zu schaffen, bei dem sich die Strömungsleitelemente durch praktisch unbegrenzte Standzeit und geringen Strömungswiderstand auszeichnen.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.

Zur Lösung dieser Aufgabe lehrt die Erfindung, daß die Strömungsleitelemente als gebogene und in sich vorgespannte Flachglasscheiben selbsttragend ausgeführt sind, die im eingebauten Zustand quer zur Strömungsrichtung einer mechanischen Druckvorspannung unterworfen sind und zumindest im Bereich der gebogenen Strömungsleitflächen eine Oberflächenrauhigkeit von wenigen Tausendstelmillimetern aufweisen.To achieve this object, 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.

Es kann mit jedem für Flachglas üblichen Tafelglas gearbeitet werden, insbesondere mit Floatgläsern (vgl. "Silikattechnik", 35, 1984, S. 200 bis 204, insbesondere Tabelle 3). In sich vorgespannt meint übliche, thermische oder chemische Vorspannung, die nach bewährten Methoden erzeugt wird (DE 10 64 207, DE 14 21 926; "Glas + Rahmen", 21, 1983, S. 1133, "Silikattechnik", 38, 1987, S. 28 bis 30). Diese Vorspannung beeinflußt positiv das Verhalten der als Strömungsleitelemente eingesetzten Glasscheiben in bezug auf die mechanischen Beanspruchungen, die in Strömungskanälen für die zu behandelnden und/oder behandelten Rauchgase einer Rauchgasreinigungsanlage auftreten. Es versteht sich, daß die Glasscheiben an ihrem seitlichen Rand an den Wänden der Strömungskanäle gehalten sind, wozu sich die verschiedenen mechanischen Hilfsmittel anbieten, beispielsweise Einschübe, Auflagen u. dgl.. In der Vorschrift, daß die Strömungsleitelemente als selbsttragende Glasscheiben ausgeführt bzw. angeordnet sind, liegt eine Bemessungsangabe, insbesondere in bezug auf die Dicke der Glasscheiben. Überraschenderweise werden auch alle auftretenden thermischen Beanspruchungen, insbesondere auch Temperaturwechselbeanspruchungen und die thermischen Beanspruchungen, die aus der Tatsache resultieren, daß die eingebauten Glasscheiben im Betrieb einer Rauchgasreinigungsanlage über ihre Fläche inhomogene Temperaturen aufweisen können, aufgenommen. Dies kann durch entsprechende Einbaumaßnahmen verwirklicht werden. Der Strömungswiderstand ist überraschend niedrig, weil die Glasscheiben zumindest im Bereich der Strömungsleitflächen eine Oberflächenrauhigkeit von wenigen Tausendstelmillimetern aufweisen. Überraschenderweise besteht bei einer derartigen Einrichtung der Oberflächenrauhigkeit auch kaum die Gefahr des Anwachsens von Feststoffen aus den Rauchgasen.It is possible to work with any sheet glass customary for flat glass, in particular with float glasses (cf. "Silikattechnik", 35, 1984, pp. 200 to 204, in particular Table 3). Prestressed in itself means the usual thermal or chemical prestressing which is produced using proven methods (DE 10 64 207, DE 14 21 926; "Glas + Rahmen", 21, 1983, p. 1133, "Silikattechnik", 38, 1987, Pp. 28 to 30). This pretension has a positive influence on the behavior of the glass panes used as flow guide elements with regard to the mechanical stresses which occur in flow channels for the flue gases to be treated and / or treated in a flue gas cleaning system. It goes without saying that 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. Like .. In the regulation that 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. Surprisingly, 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.

Bei einem erfindungsgemäßen Strömungskanal können Glasscheiben, die die Strömungsleitelemente bilden, einzeln eingesetzt und erst beim Einsetzen strömungsspaltbildend zu einem Aggregat von Strömungsleitelementen zusammengebaut werden. Es versteht sich, daß die einzelnen Glasscheiben auch einzeln austauschbar sein können. Eine bevorzugte Ausführungsform der Erfindung, die sich in montagetechnischer Hinsicht auszeichnet, ist dadurch gekennzeichnet, daß die Glasscheiben strömungsspaltbildend zu Strömungsleitelementpaketen zusammengefaßt und paketweise auswechselbar in den Strömungskanal eingebaut sind. In einem solchen Strömungsleitelementpaket können alle Glasscheiben gleich groß oder auch mit zunehmendem Krümmungsradius größerwerdend ausgebildet sein, eine Auslegung, die nach Maßgabe von strömungstechnischen Gesichtspunkten erfolgt. Die Glasscheiben können auch zu Strömungsleitelementen gebogen sein, die ihrerseits einer besonderen aerodynamischen Profilierung folgen. Der Begriff Glasscheibe umfaßt im Rahmen der Erfindung auch sogenannte Verbundglasscheiben.In a flow channel according to the invention, 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. In such a flow guide element package, 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. In the context of the invention, the term glass pane also includes so-called laminated glass panes.

Die erreichten Vorteile sind darin zu sehen, daß bei einem erfindungsgemäßen Strömungskanal die als Glasscheiben ausgeführten Strömungsleitelemente eine praktisch unbegrenzte Standzeit aufweisen. Sie zeichnen sich darüber hinaus durch geringen Strömungswiderstand aus und zeigen kann Anwachsungen von Feststoffteilchen, die die Gase mitführen. Sollten, insbesondere im Windschattenbereich, an den Strömungsleitelementen Anwachsungen auftreten, so können diese leicht abgewaschen werden.The advantages achieved can be seen in the fact that, in a flow channel according to the invention, 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.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung ausführlicher erläutert. Es zeigen in schematischer Darstellung

Fig. 1
einen Strömungskanal mit eingebauten Strömungsleitelementen, bei entfernter Seitenwand und
Fig. 2
in einem Vertikalschnitt eine andere Ausführungsform des Gegenstandes der Fig. 1.
In the following, the invention will be explained in more detail with reference to a drawing showing only one embodiment. They show a schematic representation
Fig. 1
a flow channel with built-in flow guide elements, with the side wall removed and
Fig. 2
in a vertical section another embodiment of the object of FIG. 1st

Die in den Figuren dargestellten Strömungskanäle 1 dienen für die Führung von zu behandelndem und/oder von behandeltem Rauchgas einer Rauchgasreinigungsanlage, die ihrerseits hinter einer Kesselfeuerung, z. B. hinter einer Kraftwerkskesselfeuerung, angeordnet ist. Der Strömungskanal besitzt einen rechteckigen Strömungsquerschnitt und Strömungsleitelemente 2. Im Ausführungsbeispiel ist der Strömungskanal 1 als Krümmer oder Knie geführt und in diesem Bereich sind die Strömungsleitelemente 2 eingebaut. Sie weisen gebogene Strömungsleitflächen 3 auf.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. In the exemplary embodiment, 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.

Die Strömungsleitelemente sind als gebogene Glasscheiben 2 aus einem Glas der oben angegebenen Gruppe ausgeführt, und zwar selbsttragend ausgelegt und eingebaut. Die Glasscheiben 2 sind in sich vorgespannt, und zwar in der Art und Weise wie es bei Einscheiben-Sicherheitsglasscheiben üblich ist, die insbesondere als Kraftfahrzeugfensterscheiben eingesetzt werden. Zusätzlich sind die Glasscheiben 2 jedoch quer zur Strömungsrichtung einer mechanischen Druckvorspannung unterworfen, und zwar durch entsprechende Einbaumaßnahmen. In der Fig. 2 verdeutlichen die Doppelpfeile 4 diese Druckvorspannung.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. In addition, however, the glass panes 2 are subjected to a mechanical compressive prestress transversely to the direction of flow, by means of appropriate installation measures. In Fig. 2, the double arrows 4 illustrate this pressure bias.

Aus Maßstabsgründen ist nicht erkennbar, daß die Glasscheiben 2 eine sehr geringe Oberflächenrauhigkeit aufweisen.For reasons of scale it cannot be seen that the glass panes 2 have a very low surface roughness.

Im eingebauten Zustand bilden die Glasscheiben 2 des Ausführungsbeispiels ein Strömungsleitelementenpaket 5, jedoch strömungsspaltbildend. Die nicht gezeichneten Halterungen für die Glasscheiben 2 sind entsprechend eingerichtet. In der Ausführungsform nach Fig. 1 sind die einzelnen Glasscheiben 2 des Strömungsleitelementenpaketes 5 in Strömungsrichtung unterschiedlich groß. Bei der Ausführungsform nach Fig. 2 sich alle Glasscheiben 2 des Strömungsleitelementenpaketes 5 gleich groß.In the installed state, 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. In the embodiment according to FIG. 1, the individual glass panes 2 of the flow guide element packet 5 have different sizes in the flow direction. In the embodiment according to FIG. 2, all the glass panes 2 of the flow guide element package 5 are of the same size.

Claims (3)

  1. A flow channel for the flue gas to be treated and/or for the treated flue gas of a flue gas purification installation, with flow deflector units (2) that possess bent flow deflection surfaces (3), characterized in that the flow deflection units are constructed as bent, self-supporting and prestressed panes of plate glass (2), which in the installed state are subjected to prestressing by mechanical pressure transversely to the direction of flow and have a surface roughness of a few thousandths of a millimetre at least in the area of the bent flow deflection surfaces (3).
  2. A flow channel according to Claim 1, characterized in that the panes of glass (2) are combined together to form packets (5) of flow deflector units that split up the flow, and are replaceably installed in the flow channel (1) as packets.
  3. A flow channel according to Claim 2, characterized in that all the panes of glass (2) of a packet (5) of flow deflector units are of the same size.
EP88110821A 1987-08-08 1988-07-07 Exhaust gas flue for an exhaust gas purification plant Expired - Lifetime EP0303047B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88110821T ATE68047T1 (en) 1987-08-08 1988-07-07 FLOW CHANNEL FOR THE FLUE GASES OF A FLUE GAS CLEANING PLANT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3726492 1987-08-08
DE3726492A DE3726492C1 (en) 1987-08-08 1987-08-08 Flow channel for the flue gases of a flue gas cleaning system

Publications (3)

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

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EP88110821A Expired - Lifetime EP0303047B1 (en) 1987-08-08 1988-07-07 Exhaust gas flue for an exhaust gas purification plant

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US (1) US4919170A (en)
EP (1) EP0303047B1 (en)
JP (1) JPH0621685B2 (en)
AT (1) ATE68047T1 (en)
DE (1) DE3726492C1 (en)
DK (1) DK163743C (en)

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Also Published As

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

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