WO1997047936A1 - Device for cooling hot gasses - Google Patents

Device for cooling hot gasses Download PDF

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Publication number
WO1997047936A1
WO1997047936A1 PCT/DE1997/001133 DE9701133W WO9747936A1 WO 1997047936 A1 WO1997047936 A1 WO 1997047936A1 DE 9701133 W DE9701133 W DE 9701133W WO 9747936 A1 WO9747936 A1 WO 9747936A1
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WO
WIPO (PCT)
Prior art keywords
tubes
inner body
cooling
outer body
gas
Prior art date
Application number
PCT/DE1997/001133
Other languages
German (de)
French (fr)
Inventor
Thomas Lederer
Martin Schumacher
Original Assignee
Noell-Krc Energie-Und Umwelttechnik Gmbh
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 Noell-Krc Energie-Und Umwelttechnik Gmbh filed Critical Noell-Krc Energie-Und Umwelttechnik Gmbh
Priority to EP97926980A priority Critical patent/EP0902871A1/en
Publication of WO1997047936A1 publication Critical patent/WO1997047936A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
    • B01D51/10—Conditioning the gas to be cleaned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/06—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/002—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using inserts or attachments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0075—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for syngas or cracked gas cooling systems

Definitions

  • the invention relates to a device for cooling hot gases, in particular for flue gas / exhaust gas cooling in a flue gas cleaning system in the form of pipe or tube bundle quenchers.
  • Pipe quenchers made of graphite are used to cool the flue gases to the cooling limit temperature before entering the wet absorber.
  • Such devices consist of a cross-section-dependent number of graphite tubes which are cemented in a base made of the same material and an outer shell also made of graphite.
  • a large excess of coolant is added during cooling operation just above the bottom of the pipe and rises upwards between the tubes and flows into the cooling tubes together with the flue gas via the inlet crowns of the tubes.
  • the hot flue gas supplied from above is strongly accelerated when entering the pipe tubes, due to the narrowing of the cross section caused by the tubes, and entrains the cooling liquid flowing in with strong swirling (Venturi effect).
  • a portion of the liquid is evaporated suddenly, the gas stream being cooled to the cooling limit temperature.
  • the present invention has for its object to develop a cooling device for cooling hot gases, in particular for smoke / exhaust gas cooling in flue gas cleaning systems, with which the above-mentioned. Disadvantages can be avoided.
  • a device for cooling hot gases in particular smoke / exhaust gases in Rauchgasrei ⁇ Trentsanlagen, is used in the form of a pipe or pipe bundle quencher, in which a cylindrical outer body is connected gas-tight and liquid-tight to an inner body by means of sealing flange connections is, the inner body consists of a flat round bottom, in which several tubes are fixed at regular intervals in bores.
  • the cooling principle is that gas and liquid are mixed thoroughly in the tubes, the cooling effect being brought about by coolant evaporation.
  • the outer body of the quench device consists of a fiber-reinforced plastic structure, glass fibers, Armid fibers or carbon fibers preferably being used.
  • the cylindrical outer body is integrated upwards and downwards via flange connections in the conduit path of the gas stream of the flue gas cleaning system in such a way that the hot gas flows into the device from above and the cold gas leaves the device below.
  • the bottom of the inner body contains at its edge the bores required for the flange connection to the outer body.
  • the inner tube wall of the outer body is provided with a wear shirt, which advantageously protrudes into the liquid-filled (tube) area.
  • a wear shirt is attached to the upper connecting flange of the outer quencher body.
  • the inner body which is composed of the base and tubes, is likewise made of a fiber-reinforced plastic structure, as a result of which the requirements for temperature resistance and chemical resistance can be met in this part of the device which is exposed to liquid.
  • the uppermost resin layer on the inside of the tubes contains ceramic pigment and / or mineral components, in particular SiC and / or Al 2 O 3 , whereby additional surface protection against abrasion is achieved.
  • a special feature of the invention includes that the tubes of the inner body made of plastic, preferably polypropylene (PP), polyvinyl chloride (PVC), polivinylidene fluoride (PVDF), or polytetrafluoroethylene (PTFE), ethylene-chlorotrifluoroethylene copolymer (E-CTFE), tetrafluoroethylene / Hexafluoropropylene (FEP) or Perfluoro-Alkoxylalkan (PFA) or made of SiC and / or ceramic, the upper inlet zones made of a wear-resistant material, in particular SiC or ceramic, and are placed on the tubes in the form of a protective cap. This can be easily replaced if worn.
  • PP polypropylene
  • PVC polyvinyl chloride
  • PVDF polivinylidene fluoride
  • PTFE polytetrafluoroethylene
  • E-CTFE ethylene-chlorotrifluoroethylene copolymer
  • FEP t
  • the tubes of the inner body have bores distributed over the circumference of the tube at their upper inlet openings and below the tube edges. This design allows a partial application of liquid through the pipe wall into the inside of the pipe, while the main amount of liquid continues to flow into the inside of the pipe via the pipe end.
  • the tubes of the inner body are provided with different diameters according to a special feature of the invention, whereby an optimal ratio of cross section to free flow area can be established.
  • the cooling principle is that gas and liquid are mixed thoroughly in the tubes, the cooling effect being brought about by coolant evaporation. Because of the good anti-corrosion properties of the materials used, this is particularly advantageously possible at this point in the process, in particular the resistance to the high temperatures which occur there partially and at the same time as being corrosive.
  • the construction of the device according to the invention is furthermore considerably lighter than a graphite version.
  • the saving may be between 14 up to 2/3 of structural weight in this area.
  • the device according to the invention can be manufactured in two parts, which, in contrast to known devices made of graphite (full construction), has greater advantages with regard to the maintenance of the device, especially in areas of application with high solids in the coolant and the resulting tendency to become soiled and encrusted.
  • the assembly of the device is considerably simplified by the embodiment according to the invention, since the tensile stresses otherwise required for devices made of graphite, in order to ensure tightness during operation, can be omitted here. As a result, there is no longer any risk of equipment breakage due to tensile stresses with uneven installation.
  • the device according to the invention is also considerably less sensitive to handling due to the materials used.
  • brackets for the required absolutely planar installation based on the inlet level of the pipes in the flue gas duct, is unproblematic, or a compensating device can be attached very easily to the device in order to be able to readjust such an installation position at any time.
  • Figure 1 Cross section through a pipe quencher
  • Figure 2 Detail - cooling pipe with protective cap -.
  • a pipe or tube bundle quencher is shown in FIG.
  • the cylindrical outer body 2 is connected to the inner body in a gas-tight and liquid-tight manner by means of sealing flange connections (only the seals 4 are shown), the inner body consisting of a tarpaulin round base 3 in which several tubes 1 with a defined height are fastened in bores .
  • the outer body 2 consists of a glass-synthetic resin structure and, depending on the requirement, either in high-temperature or normal design.
  • the outer body 2 is up and down via flange connections in the
  • the gas flow path of the flue gas cleaning system is integrated in such a way that the hot gas flows into the device from above and the cold gas leaves the device below (not shown).
  • the bottom 3 of the inner body contains at its edge that for
  • Flange connection with the outer body 2 required holes (not shown). To connect the bottom with the outer body are the
  • Screw nuts firmly laminated in the floor body (not shown).
  • the inner tube wall of the outer body 2 is provided with a wear shirt 5 (only indicated), which advantageously extends into the liquid-filled (tube) area.
  • a wear shirt 5 (only indicated), which advantageously extends into the liquid-filled (tube) area.
  • the inner body which is composed of base 3 and tubes 1, is likewise made of a glass / synthetic resin structure, which meets the requirements
  • the tubes 1 of the inner body can also be made of plastic, preferably
  • Polypropylene PP
  • polyvinyl chloride PVC
  • PVDF polivinylidene fluoride
  • Polytetrafluorethyien (PTFE) or SiC and / or ceramic consist, the upper Einlaufzone ⁇ made of a wear-resistant material, in particular SiC or
  • Ceramic exist and in the form of a protective cap 6 (see Figure 2) are placed on the tubes 1. This can be easily replaced if worn.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

A device is disclosed for cooling hot gasses, in particular for cooling smoke gasses or exhaust fumes from smoke gas cleaning plants, designed as quench or tube bundle coolers. The disclosed device for cooling hot gasses, in particular for cooling smoke gasses or exhaust fumes from smoke gas cleaning plants, designed as a quench or tube bundle cooler, has a cylindrical outer body (2) joined by sealing flange unions in a gas- and liquid-tight manner to an inner body which consists of a flat, round bottom (3) to which several pipes (1) with a defined height are secured in bores arranged at regular intervals. The cooling principle consists in intimately mixing gas and liquid in the pipes, the cooling effect being achieved by evaporation of the cooling medium.

Description

Vorrichtung zur Kühlung heißer GaseDevice for cooling hot gases
Beschreibungdescription
Die Erfindung betrifft eine Vorrichtung zur Kühlung heißer Gase, insbesondere zur Rauchgas-/Abgaskühlung in Rauchgasreinigungsanlageπ in Form von Pfeifen- bzw. Rohrbündelquenchern.The invention relates to a device for cooling hot gases, in particular for flue gas / exhaust gas cooling in a flue gas cleaning system in the form of pipe or tube bundle quenchers.
Zur Kühlung der Rauchgase auf Kühlgrenztemperatur vor Eintritt in den Naßabsorber werden in diesem als kritisch zu betrachtenden Bereich Pfeifenquencher aus Graphit eingesetzt.Pipe quenchers made of graphite are used to cool the flue gases to the cooling limit temperature before entering the wet absorber.
Solche Geräte bestehen aus einer querschnittsabhängigen Anzahl von Graphit - Röhren, die in einem Boden aus dem gleichen Material eingekittet sind und einer Außenhülle ebenfalls aus Graphit.Such devices consist of a cross-section-dependent number of graphite tubes which are cemented in a base made of the same material and an outer shell also made of graphite.
Kühlflüssigkeit wird bei Kühlbetrieb kurz über dem Pfeifenboden im großen Überschuß zugegeben und steigt zwischen den Röhren nach oben empor und fließt über die Einlaufkronen der Röhren zusammen mit dem Rauchgas in die Kühlrohre ein. Das von oben zugeführte heiße Rauchgas wird bei Eintritt in die Pfeifenröhren, bei der durch die Röhren bedingten Querschnittsverengung stark beschleunigt und reißt die mitströmende Kühlflüssigkeit unter starker Verwirbelung (Venturi - Effekt) mit. Hierbei wird eine Teilmenge der Flüssigkeit schlagartig verdampft, wobei der Gasstrom auf Kühlgrenztemperatur abgekühlt wird.A large excess of coolant is added during cooling operation just above the bottom of the pipe and rises upwards between the tubes and flows into the cooling tubes together with the flue gas via the inlet crowns of the tubes. The hot flue gas supplied from above is strongly accelerated when entering the pipe tubes, due to the narrowing of the cross section caused by the tubes, and entrains the cooling liquid flowing in with strong swirling (Venturi effect). Here, a portion of the liquid is evaporated suddenly, the gas stream being cooled to the cooling limit temperature.
Nachteile solcher Vorrichtungen aus Graphit ergeben sich insbesondere aus dem hohen Baugewicht, der üblichen Vollbauweise (wartungsunfreundlich), sowie den Materialeigenschaften des Graphits. Graphit ist außerdem stark schlagbruchgefährdet (spröde) und deshalb sehr empfindlich im Handling. Die Montage solcher Geräte in Graphitausführung ist aufwendig, da für die Gewährleistung der Dichtigkeit im Betrieb ein Einbau unter Zugspannungen erfolgen muß, was mit Sonderbefestigungen für das Einspannen des Gerätes zwischenDisadvantages of such devices made of graphite arise in particular from the high construction weight, the customary full construction (unfriendly to maintenance) and the material properties of the graphite. Graphite is also very susceptible to breakage (brittle) and therefore very sensitive to handling. The assembly of such devices in graphite design is complex because installation to ensure tightness during operation is carried out under tensile stress must what with special fastenings for clamping the device between
Sonderflansche mittels Zugankerstangen und Vorspannfedern erreicht wird.Special flanges are achieved using tie rods and preload springs.
Der Einbau mit Zugspannungen ist aufgrund der bereits erwähnten Sprödigkeit desThe installation with tensile stress is due to the brittleness of the already mentioned
Materials verbunden mit der Gefahr eines Gerätebruches bei ungleichmäßigerMaterial associated with the risk of device breakage with uneven
Montage.Assembly.
Außerdem ermöglicht eine Fertigung solcher Geräte in Grafit keine Anpassung an das jeweilige Anforderungsprofil für verschiedene Einsatztemperaturen, was insbesondere bei Niedrigtemperaturausführungen zu nicht unerheblichenIn addition, manufacturing such devices in graphite does not allow adaptation to the respective requirement profile for different operating temperatures, which is not insignificant, particularly in the case of low-temperature designs
Kostennachteilen führt.Leads to cost disadvantages.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Kühlvorrichtung zur Kühlung heißer Gase, insbesondere zur Rauch-/Abgaskühlung in Rauchgasreinigungsanlagen zu entwickeln, mit welcher die o. g. Nachteile vermieden werden können.The present invention has for its object to develop a cooling device for cooling hot gases, in particular for smoke / exhaust gas cooling in flue gas cleaning systems, with which the above-mentioned. Disadvantages can be avoided.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß eine Vorrichtung zur Kühlung heißer Gase, insbesondere Rauch-/Abgase in Rauchgasreiπigungsanlagen, in Form eines Pfeifen- bzw. Rohrbündelquenchers eingesetzt wird, bei dem ein zylindrischer Außenkörper mittels abdichtender Flanschverbindungen gas- und flüssigkeitsdicht mit einem Innenkörper verbunden ist, wobei der Innenkörper aus einem planen runden Boden besteht, in welchem in regelmäßigen Abständen mehrere Röhren mit definierter Höhe in Bohrungen befestigt sind. Das Kühlprinzip besteht darin, daß Gas und Flüssigkeit in den Röhren intensiv durchmischt werden, wobei durch Kühlmittelverdampfung der Kühleffekt bewirkt wird. Nach einem bevorzugten Merkmal der Erfindung besteht der Außenkörper der Quenchvorrichtung aus einem faserverstärkten Kunststoff-Aufbau, wobei vorzugsweise Glasfasern, Armid- oder Kohlefasern verwendet werden. Der zylindrische Außenkörper ist nach oben und unten über Flanschverbindungen in den Leitungsweg des Gasstromes der Rauchgasreinigungsanalge derart eingebunden, daß das heiße Gas von oben in die Vorrichtung einströmt und das kalte Gas unten die Vorrichtung verläßt. Der Boden des Inneπkörpers enthält dabei an seinem Rand die für die Flanschverbindung mit dem Außenkörper erforderlichen Bohrungen. Zur Verbindung des Bodens mit dem Außenkörper sind die Schraubenmuttern im Bodenkörper fest einlaminiert.According to the invention the object is achieved in that a device for cooling hot gases, in particular smoke / exhaust gases in Rauchgasreiπigungsanlagen, is used in the form of a pipe or pipe bundle quencher, in which a cylindrical outer body is connected gas-tight and liquid-tight to an inner body by means of sealing flange connections is, the inner body consists of a flat round bottom, in which several tubes are fixed at regular intervals in bores. The cooling principle is that gas and liquid are mixed thoroughly in the tubes, the cooling effect being brought about by coolant evaporation. According to a preferred feature of the invention, the outer body of the quench device consists of a fiber-reinforced plastic structure, glass fibers, Armid fibers or carbon fibers preferably being used. The cylindrical outer body is integrated upwards and downwards via flange connections in the conduit path of the gas stream of the flue gas cleaning system in such a way that the hot gas flows into the device from above and the cold gas leaves the device below. The bottom of the inner body contains at its edge the bores required for the flange connection to the outer body. To connect the floor with the outer body, the screw nuts are firmly laminated in the floor body.
Nach einem weiteren Merkmal ist die innere Rohrwandung des Außenkörpers mit einem Verschleißhemd versehen, welches in vorteilhafter Weise bis in den flüssigkeitsbefüllten (Röhren - ) Bereich ragt. Befestigt wird ein solches Verschleißhemd mit am oberen Verbindungsflansch des Quencheraußenkörpers.According to a further feature, the inner tube wall of the outer body is provided with a wear shirt, which advantageously protrudes into the liquid-filled (tube) area. Such a wear shirt is attached to the upper connecting flange of the outer quencher body.
Nach einem weiteren Merkmal der Erfindung sind der aus Boden und Röhren sich zusammensetzende Innenkörper ebenfalls aus einem faserverstärkten Kunststoff- Aufbau ausgeführt, wodurch die Anforderungen an Temperaturbeständigkeit und chemischer Beständigkeit in diesem mit Flüssigkeit beaufschlagten Geräteteil erfüllt werden können.According to a further feature of the invention, the inner body, which is composed of the base and tubes, is likewise made of a fiber-reinforced plastic structure, as a result of which the requirements for temperature resistance and chemical resistance can be met in this part of the device which is exposed to liquid.
Nach einem anderen Merkmal der Erfindung enthält die oberste Harzschicht auf der Innenseite der Röhren Keramikpigment und/oder mineralische Bestandteile, insbesondere SiC und/oder Al203, wodurch ein zusätzlicher Oberflächenschutz gegen Abrasion erreicht wird.According to another feature of the invention, the uppermost resin layer on the inside of the tubes contains ceramic pigment and / or mineral components, in particular SiC and / or Al 2 O 3 , whereby additional surface protection against abrasion is achieved.
Ein besonderes Merkmal der Erfindung beinhaltet, daß die Röhren des Innenkörpers aus Kunststoff, vorzugsweise Polypropylen (PP), Polyvinylchlorid (PVC), Polivinylidenfluorid (PVDF), oder Polytetrafluorethylen (PTFE), Ethylen- Chlortrifluorethylen-Copolymerisat (E-CTFE), Tetrafluorethylen/Hexafluorpropylen (FEP) oder Perfluoro-Alkoxylalkan (PFA) oder aus SiC und/oder Keramik bestehen, wobei die oberen Einlaufzonen aus einem verschleißfestem Material, insbesonder SiC oder Keramik bestehen und in Form einer Schutzkappe auf die Röhren aufgesetzt sind. Diese kann bei Verschleiß entsprechend einfach ausgewechselt werden. Nach einem bevorzugten Merkmal weisen die Röhren des Innenkörpers an ihren oberen Einlauföffnungen und unterhalb der Rohrkanten über den Rohrumfang verteilte Bohrungen auf. Diese Ausführung gestattet eine teilweise Flüssigkeitsbeaufschlagung durch die Rohrwandung ins Röhreninnere, während die Hauptflüssigkeitsmenge weiterhin über das Rohrende in das Röhreninnere strömt.A special feature of the invention includes that the tubes of the inner body made of plastic, preferably polypropylene (PP), polyvinyl chloride (PVC), polivinylidene fluoride (PVDF), or polytetrafluoroethylene (PTFE), ethylene-chlorotrifluoroethylene copolymer (E-CTFE), tetrafluoroethylene / Hexafluoropropylene (FEP) or Perfluoro-Alkoxylalkan (PFA) or made of SiC and / or ceramic, the upper inlet zones made of a wear-resistant material, in particular SiC or ceramic, and are placed on the tubes in the form of a protective cap. This can be easily replaced if worn. According to a preferred feature, the tubes of the inner body have bores distributed over the circumference of the tube at their upper inlet openings and below the tube edges. This design allows a partial application of liquid through the pipe wall into the inside of the pipe, while the main amount of liquid continues to flow into the inside of the pipe via the pipe end.
Zur optimalen Ausnutzung des verfügbaren Gesamtquerschnittes sind nach einem besonderen Merkmal der Erfindung die Röhren des Innenkörpers mit unterschiedlichen Durchmessern versehen, wodurch ein optimales Verhältnis von Querschnitt zu freier Durchströmfläche hergestellt werden kann.For optimal use of the available total cross section, the tubes of the inner body are provided with different diameters according to a special feature of the invention, whereby an optimal ratio of cross section to free flow area can be established.
Das Kühlprinzip besteht darin, daß Gas und Flüssigkeit in den Röhren intensiv durchmischt werden, wobei durch Kühlmittelverdampfung der Kühleffekt bewirkt wird. Aufgrund der guten Antikorrosionseigenschaften der eingesetzten Werkstoffe ist dies an dieser Stelle im Prozeß besonders vorteilhaft möglich, insbesondere die Widerstandsfähigkeit gegen die dort partiell und gleichzeitig zur Korrosivität auftretenden hohen Temperaturen.The cooling principle is that gas and liquid are mixed thoroughly in the tubes, the cooling effect being brought about by coolant evaporation. Because of the good anti-corrosion properties of the materials used, this is particularly advantageously possible at this point in the process, in particular the resistance to the high temperatures which occur there partially and at the same time as being corrosive.
Die Herstellung einer Vorrichtung in den vorgenannten Ausführungen ist weitaus kostengünstiger als die bislang bekannten Ausführungen in Graphit. Durch Einsatz eines am jeweiligen Anforderungsprofil genau orientierten Polymergrundstoffs können Vorrichtungen für verschiedene Einsatztemperaturen zwischen 140°C bis 220°C gezielt hergestellt werden und zwar mit besonderen Kostenvorteilen für Niedrigtemperaturausführungen.The manufacture of a device in the aforementioned versions is far more cost-effective than the previously known versions in graphite. By using a polymer base material that is precisely oriented to the respective requirement profile, devices for various operating temperatures between 140 ° C to 220 ° C can be produced in a targeted manner, with particular cost advantages for low-temperature designs.
Die Bauweise der erfindungsgemäßen Vorrichtung ist weiterhin gegenüber einer Graphitausführung wesentlich leichter. Die Einsparung kann in diesem Bereich zwischen 14 bis zu 2/3 des Baugewichtes betragen.The construction of the device according to the invention is furthermore considerably lighter than a graphite version. The saving may be between 14 up to 2/3 of structural weight in this area.
Die Vorrichtung gemäß der Erfindung kann zweiteilbar gefertigt werden, was im Gegensatz zu bekannten Vorrichtungen in Graphitausführung (Vollbauweise) größere Vorteile bezüglich der Wartung der Vorrichtung, speziell in Einsatzbereichen mit hohen Feststoffanteilen in der Kühlflüssigkeit und daraus resultierender Verschmutzungs- und Verkrustungsneigung, mit sich bringt.The device according to the invention can be manufactured in two parts, which, in contrast to known devices made of graphite (full construction), has greater advantages with regard to the maintenance of the device, especially in areas of application with high solids in the coolant and the resulting tendency to become soiled and encrusted.
Außerdem wird durch die erfindungsgemäße Ausführung die Montage der Vorrichtung erheblich vereinfacht, da die sonst bei Vorrichtungen aus Graphit erforderlichen Zugspannungen, für die Gewährleistung der Dichtigkeit im Betrieb, hier entfallen können. Dadurch besteht nicht mehr die Gefahr eines Gerätebruches durch Zugspannungen bei ungleichmäßiger Montage.In addition, the assembly of the device is considerably simplified by the embodiment according to the invention, since the tensile stresses otherwise required for devices made of graphite, in order to ensure tightness during operation, can be omitted here. As a result, there is no longer any risk of equipment breakage due to tensile stresses with uneven installation.
Die erfindungsgemäße Vorrichtung ist weiterhin durch die eingesetzten Werkstoffe wesentlich unempfindlicher im Handling.The device according to the invention is also considerably less sensitive to handling due to the materials used.
Bei der erfindungsgemäßen Vorrichtung gestaltet sich das Anbringen von Halterungen für den erforderlichen absolut planaren Einbau, bezogen auf die Einlaufebene der Pfeifen im Rauchgaskanal unproblematisch, bzw. es kann sehr leicht eine Ausgleichseinrichtung an der Vorrichtung befestigt werden, um eine solche Einbaulage jederzeit nachregeln zu können.In the device according to the invention, the attachment of brackets for the required absolutely planar installation, based on the inlet level of the pipes in the flue gas duct, is unproblematic, or a compensating device can be attached very easily to the device in order to be able to readjust such an installation position at any time.
Anhand der Zeichnung sind Ausführungsbeispiele der Erfindung näher erläutert, darin zeigen in schematischer AbbildungExemplary embodiments of the invention are explained in more detail with reference to the drawing, which show a schematic illustration
Figur 1 : Querschnitt durch einen PfeifenquencherFigure 1: Cross section through a pipe quencher
Figur 2: Detail - Kühlrohr mit Schutzkappe -.Figure 2: Detail - cooling pipe with protective cap -.
In Figur 1 ist ein Pfeifen- bzw. Rohrbündelquencher dargestellt. Der zylindrische Außenkörper 2 ist mittels abdichtender Flanschverbindungen (dargestellt sind nur die Dichtungen 4) gas- und flüssigkeitsdicht mit dem Innenkörper verbunden, wobei der Innenkörper aus einem Planen runden Boden 3 besteht, in welchem in regelmäßigen Abständenmehrere Röhren 1 mit definierter Höhe in Bohrungen befestigt sind. Der Außenkörper 2 besteht aus einem Glas - Kunstharz - Aufbau und zwar je nach Anforderung entweder in Hochtemperatur- oder Normalausführung. Der Außenkörper 2 ist nach oben und unten über Flanschverbindungen in den Leitungsweg des Gasstromes der Rauchgasreinigungsanalge derart eingebunden, daß das heiße Gas von oben in die Vorrichtung einströmt und das kalte Gas unten die Vorrichtung verläßt (nicht dargestellt).A pipe or tube bundle quencher is shown in FIG. The cylindrical outer body 2 is connected to the inner body in a gas-tight and liquid-tight manner by means of sealing flange connections (only the seals 4 are shown), the inner body consisting of a tarpaulin round base 3 in which several tubes 1 with a defined height are fastened in bores . The outer body 2 consists of a glass-synthetic resin structure and, depending on the requirement, either in high-temperature or normal design. The outer body 2 is up and down via flange connections in the The gas flow path of the flue gas cleaning system is integrated in such a way that the hot gas flows into the device from above and the cold gas leaves the device below (not shown).
Der Boden 3 des Innenkörpers enthält dabei an seinem Rand die für dieThe bottom 3 of the inner body contains at its edge that for
Flanschverbindung mit dem Außenkörper 2 erforderlichen Bohrungen (nicht dargestellt). Zur Verbindung des Bodens mit dem Außenkörper sind dieFlange connection with the outer body 2 required holes (not shown). To connect the bottom with the outer body are the
Schraubenmuttern im Bodenkörper fest einlaminiert (nicht dargestellt).Screw nuts firmly laminated in the floor body (not shown).
Die innere Rohrwandung des Außenkörpers 2 ist mit einem Verschleißhemd 5 (nur angedeutet dargestellt) versehen, welches in vorteilhafter Weise bis in den flüssigkeitsbefüllten (Röhren - ) Bereich ragt. Befestigt wird ein solchesThe inner tube wall of the outer body 2 is provided with a wear shirt 5 (only indicated), which advantageously extends into the liquid-filled (tube) area. One is attached
Verschleißhemd mit am oberen Verbindungsflansch 4 desWear shirt with on the upper connecting flange 4 of the
Quencheraußenkörpers 2.Quencher outer body 2.
Der aus Boden 3 und Röhren 1 sich zusammensetzende Innenkörper ist ebenfalls aus einem Glas - Kunstharz - Aufbau ausgeführt, wodurch die Anforderungen anThe inner body, which is composed of base 3 and tubes 1, is likewise made of a glass / synthetic resin structure, which meets the requirements
Temperaturbeständigkeit und chemischer Beständigkeit in diesem mit Flüssigkeit beaufschlagten Geräteteil erfüllt werden.Temperature resistance and chemical resistance can be fulfilled in this liquid-loaded device part.
Die Röhren 1 des Innenkörpers können auch aus Kunststoff, vorzugsweiseThe tubes 1 of the inner body can also be made of plastic, preferably
Polypropylen (PP), Polyvinylchlorid (PVC), Polivinylidenfluorid (PVDF) oderPolypropylene (PP), polyvinyl chloride (PVC), polivinylidene fluoride (PVDF) or
Polytetrafluorethyien (PTFE) oder aus SiC und/oder Keramik bestehen, wobei die oberen Einlaufzoneπ aus einem verschleißfestem Material, insbesonder SiC oderPolytetrafluorethyien (PTFE) or SiC and / or ceramic consist, the upper Einlaufzoneπ made of a wear-resistant material, in particular SiC or
Keramik bestehen und in Form einer Schutzkappe 6 (siehe Figur 2) auf die Röhren 1 aufgesetzt sind. Diese kann bei Verschleiß entsprechend einfach ausgewechselt werden. Ceramic exist and in the form of a protective cap 6 (see Figure 2) are placed on the tubes 1. This can be easily replaced if worn.

Claims

Patentansprüche claims
1. Vorrichtung zur Kühlung heißer Gase, insbesondere zur Rauch-/ Abgaskühlung in Rauchgasreinigungsanlagen, in Form von Pfeifen- bzw. Rohrbündelquenchern, dadurch gekennzeichnet, daß ein zylindrischer Außenkörper (2) mittels abdichtender Flanschverbindungen (4) gas- und flüssigkeitsdicht mit einem Innenkörper verbunden ist, wobei der Innenkörper aus einem planen runden Boden (3) besteht, in welchem in regelmäßigen Abständen mehrere Röhren (1) mit definierter Höhe in Bohrungen befestigt sind.1. Device for cooling hot gases, especially for smoke / exhaust gas cooling in flue gas cleaning systems, in the form of pipe or tube bundle quenchers, characterized in that a cylindrical outer body (2) by means of sealing flange connections (4) connected gas and liquid-tight to an inner body is, the inner body consists of a flat round bottom (3), in which several tubes (1) are fixed at regular intervals in bores.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß der Außenkörper (2) aus einem faserverstärkten Kunststoff-Aufbau besteht.2. Device according to claim 1, characterized in that the outer body (2) consists of a fiber-reinforced plastic structure.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der faserverstärkte Kunststoff-Aufbau Glasfasern, und/oder Armidfasern, und/oder Kohlefasern enthält.3. Apparatus according to claim 2, characterized in that the fiber-reinforced plastic structure contains glass fibers, and / or Armid fibers, and / or carbon fibers.
4. Vorrichtung nach wenigstens einem der oben genannten Ansprüche, dadurch gekennzeichnet, daß die innere Rohrwandung des Außenkörpers (2) ein Verschleißhemd (5) aufweist.4. The device according to at least one of the above claims, characterized in that the inner tube wall of the outer body (2) has a wear shirt (5).
5. Vorrichtung nach wenigstens einem der oben genannten Ansprüche, dadurch gekennzeichnet, daß der zylindrische Außenkörper (2) nach oben und unten über Flanschverbindungen (4) in den Leitungsweg des Gasstromes der Rauchgasreinigungsanalge derart eingebunden ist, daß das heiße Gas von oben in die Vorrichtung einströmt und das kalte Gas unten die Vorrichtung verläßt. 5. The device according to at least one of the above claims, characterized in that the cylindrical outer body (2) up and down via flange connections (4) in the conduit of the gas stream of the flue gas cleaning system is integrated such that the hot gas from above into the device flows in and the cold gas leaves the device below.
6. Vorrichtung nach wenigstens einem der oben genannten Ansprüche, dadurch gekennzeichnet, daß der Boden (3) des Innenkörpers an seinem Rand die für die Flanschverbindung mit dem Außenkörper (2) erforderlichen Bohrungen enthält.6. The device according to at least one of the above claims, characterized in that the bottom (3) of the inner body at its edge contains the bores required for the flange connection to the outer body (2).
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß zur Verbindung des Bodens (3) mit dem Außenkörper (2) Schraubenmuttern im Bodenkörper (3) fest einlaminiert sind.7. The device according to claim 6, characterized in that for connecting the bottom (3) with the outer body (2) screw nuts in the bottom body (3) are laminated firmly.
8. Vorrichtung nach wenigstens einem der oben genannten Ansprüche, dadurch gekennzeichnet, daß der aus Boden (3) und Röhren (1) sich zusammensetzende Innenkörper aus einem faserverstärkten Kunststoff-Aufbau besteht und vorzugsweise Glasfasern, und/oder Armidfasern, und/oder Kohlefasern als faserverstärkende Komponente enthält.8. The device according to at least one of the above claims, characterized in that the bottom (3) and tubes (1) composed of the inner body consists of a fiber-reinforced plastic structure and preferably glass fibers, and / or Armid fibers, and / or carbon fibers as contains fiber-reinforcing component.
9. Vorrichtung nach wenigstens einem der oben genannten Ansprüche, dadurch gekennzeichnet, daß in die oberste Harzschicht auf der Innenseite der Röhren (1) Keramikpigment und/oder mineralische Bestandteile eingebracht sind.9. The device according to at least one of the above claims, characterized in that in the top resin layer on the inside of the tubes (1) ceramic pigment and / or mineral components are introduced.
10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß in die oberste Harzschicht auf der Innenseite der Röhren (1) Keramikpigment und/oder mineralische Bestandteile, insbesondere SiC und/oder Al203, eingebracht sind.10. The device according to claim 9, characterized in that in the uppermost resin layer on the inside of the tubes (1) ceramic pigment and / or mineral components, in particular SiC and / or Al 2 0 3 , are introduced.
11. Vorrichtung nach wenigstens einem der oben genannten Ansprüche, dadurch gekennzeichnet, daß die Röhren (1) des Innenkörpers aus Kunststoff bestehen. 11. The device according to at least one of the above claims, characterized in that the tubes (1) of the inner body consist of plastic.
12. Vorrichtung nach Anspruch 11 , dadurch gekennzeichnet, daß die Röhren (1)des Innenkörpers aus Polypropylen (PP), Polyethylen (PE), Polyvinylchlorid (PVC), Polivinylidenfluorid (PVDF) oder Polytetrafluorethylen (PTFE), Ethylen-Chlortrifluorethylen-Copolymerisat (E-CTFE), Tetrafluorethylen/Hexafluorpropylen (FEP) oder Perfluoro-Alkoxylalkan (PFA)bestehen.12. The apparatus according to claim 11, characterized in that the tubes (1) of the inner body made of polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), polivinylidene fluoride (PVDF) or polytetrafluoroethylene (PTFE), ethylene-chlorotrifluoroethylene copolymer ( E-CTFE), tetrafluoroethylene / hexafluoropropylene (FEP) or perfluoro-alkoxylalkane (PFA).
13. Vorrichtung nach wenigstens einem der oben genannten Ansprüche, dadurch gekennzeichnet, daß die Röhren (1) des Innenkörpers aus SiC und/oder Keramik bestehen.13. The device according to at least one of the above claims, characterized in that the tubes (1) of the inner body consist of SiC and / or ceramic.
14. Vorrichtung nach wenigstens einem der oben genannten Ansprüche, dadurch gekennzeichnet, daß die Röhren (1) des Innenkörpers aus Kunststoff bestehen, wobei die oberen Einlaufzonen aus einem verschleißfestem Material, insbesonder SiC oder Keramik bestehen und in Form einer Kappe (6) auf die Röhren (1) aufgesetzt sind.14. The device according to at least one of the above claims, characterized in that the tubes (1) of the inner body consist of plastic, the upper inlet zones made of a wear-resistant material, in particular SiC or ceramic and in the form of a cap (6) on the Tubes (1) are attached.
15. Vorrichtung nach wenigstens einem der oben genannten Ansprüche, dadurch gekennzeichnet, daß die Röhren (1) des Innenkörpers an ihren oberen Einlauföffnungen und unterhalb der Rohrkanten über den Rohrumfang verteilte Bohrungen aufweisen.15. The device according to at least one of the above claims, characterized in that the tubes (1) of the inner body at their upper inlet openings and below the pipe edges have holes distributed over the pipe circumference.
16. Vorrichtung nach wenigstens einem der oben genannten Ansprüche, dadurch gekennzeichnet, daß die Röhren (1 ) des Innenkörpers unterschiedliche Durchmesser aufweisen. 16. The device according to at least one of the above claims, characterized in that the tubes (1) of the inner body have different diameters.
PCT/DE1997/001133 1996-06-08 1997-06-06 Device for cooling hot gasses WO1997047936A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97926980A EP0902871A1 (en) 1996-06-08 1997-06-06 Device for cooling hot gasses

Applications Claiming Priority (2)

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DE1996122976 DE19622976A1 (en) 1996-06-08 1996-06-08 Device for flue gas cooling in flue gas cleaning plants
DE19622976.6 1996-06-08

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EP0902871A1 (en) 1999-03-24

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