EP0343434B1 - Seraping device for pipes - Google Patents
Seraping device for pipes Download PDFInfo
- Publication number
- EP0343434B1 EP0343434B1 EP89108450A EP89108450A EP0343434B1 EP 0343434 B1 EP0343434 B1 EP 0343434B1 EP 89108450 A EP89108450 A EP 89108450A EP 89108450 A EP89108450 A EP 89108450A EP 0343434 B1 EP0343434 B1 EP 0343434B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- metal part
- pipe
- residues
- discharge opening
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G3/00—Rotary appliances
- F28G3/08—Rotary appliances having coiled wire tools, i.e. basket type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/045—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices being rotated while moved, e.g. flexible rotating shaft or "snake"
Definitions
- the invention relates to a pipe scraping device for the removal of residues deposited on the inner wall of a hot gas and / or vapor leading pipe during operation, with at least one scraping device which can be actuated by an axially extended shaft, with a bushing for the axially extended shaft and with at least one discharge opening for the removed residues.
- a generic device is known from a magazine (Chem.-Ing.-Techn., Vol. 54, 1982, page 382, Fig. 4).
- This device has a driven shaft which carries various axially extending scraping devices. When scraped radially, these scraping devices scrape off residues deposited on the inner wall. Both the central shaft and the scraper devices remain stationary in the interior of the device and are continuously heated by the hot ones flowing through this interior Gases and / or vapors are applied.
- This device can therefore only be used in a temperature range of up to a few 100 ° C, since the scratching devices would melt at higher temperatures and could therefore no longer fulfill their function.
- the use of more temperature-resistant materials for the scratching devices, for example ceramics, in order to achieve a higher operating temperature, does not make sense, since these are not mechanically resilient and are also very difficult and expensive to machine.
- a massive cutting tool for pipe cleaning is known from FR-A-397.008, which closes almost the entire pipe cross section during the cutting process. This cutting tool is not suitable for work during the operation of the pipe to be cleaned and also not for use at high temperatures.
- the invention seeks to remedy this.
- the invention as characterized in the claims, solves the problem of creating a pipe scraping device with which residues can be removed from areas exposed to temperatures above 1300 ° C. with simple means.
- the advantages achieved by the invention are essentially to be seen in the fact that known materials, e.g. Steel that is comparatively easy to machine can be used.
- the scratching device is used periodically and only for such a long time in the area of high temperatures that it does not warm up appreciably and thus cannot lose its mechanical strength.
- the temperature range in which this device operates can thus be increased to over 1300 ° C. with simple means.
- the single figure shows an embodiment of a device according to the invention.
- a device according to the invention is shown in the single figure.
- a cooler 2 made of ceramic with a cylindrical interior 3 and cooling tubes 4 embedded in the wall is flanged to an opening in the outer wall 5 of a furnace.
- An arrow 6 indicates the direction of flow of hot gases and / or vapors which emerge from the furnace and which are cooled in the cooler 2.
- portions of the hot gases and / or vapors condense or desublimate and settle on the inner wall 7 of the cooler 2.
- the cooled gas leaves the cooler 2, as indicated by an arrow 8, through a flanged connection piece 9.
- a cylindrical cavity 10 is provided in its axial extension, which has the same diameter as the cooler 2 and which is completed by an end wall 11.
- the walls of this cavity 10 are made of steel, for example, a ceramic lining is not necessary here because of the lower temperatures.
- a bushing 12 for a rotatable, axially extending shaft 13 which at the same time guides this shaft 13.
- a metal part 15 is attached to the tip 14 of this axially extending shaft 13, which is helically wound in the axial direction and has, for example, approximately 1 1/2 turns.
- This dimensionally stable metal part 15 forms the actual scratching device of this device.
- a discharge opening 16 is provided at the bottom at the lowest point, to which a collecting container 17 is flanged. When changing the collecting container 17, the discharge opening 16 can be closed by means of a slide 18, which is only indicated here.
- the cooler 2 the hot gases and / or vapors entering the oven at more than 1300 ° C. are cooled. Condense or desublimate during this cooling process Residues and are deposited on the cooled inner wall 7 of the cooler 2. These residues can be raw materials produced in iron and steel works, but they can also be pollutants, for example, that are removed from contaminated gas-steam mixtures. Furthermore, this cooler 2 can be an assembly whose functionality is impaired by these residues. To remove these residues, the axially extending shaft 13 is now set in rotation by a drive, not shown, and at the same time displaced in the axial direction.
- the feed and the rotational speed are matched to the slope of the turns of the metal part 15 such that it is moved in the tubular interior 3 of the cooler like a corkscrew against the flow direction indicated by the arrow 6.
- the clear flow cross section of the cooler 2 is thereby only insignificantly reduced. This screwing movement prevents residues from being scraped off the inner wall 7 and pushed towards the hot zone of the cooler 2 on the oven side, where they would melt or evaporate again.
- the metal part 17 is pulled back into the rest position by the shaft 13, scrapes off the residues from the inner wall 7 and transports them to the discharge opening 16.
- This movement sequence from the rest position of the Scraper device in the hot zone and back to the rest position in the cooler area of the tube takes place in a comparatively short time, so that the metal part 15 cannot reach the predetermined limit temperature for its application.
- the sequence of movements is repeated periodically.
- the rotational movement can be maintained in the same sense as with the corkscrew-like forward screwing if a particularly good scratching effect is to be achieved.
- the metal part 15 can also be withdrawn without this rotary movement. It is beneficial if the edge of the metal part 15, which is stressed during the scratching process, is ground particularly sharp and is designed as a scratching edge. With certain residues, it can also make sense to harden these scratched edges.
- the metal part 15 can be designed such that it just fits into the cylindrical interior 3, but it can also be designed to be resilient in such a way that it presses against the inner wall 7 with spring force. In this way, it is also possible to scrape off baked-on residues and to transport them into the collecting container 17.
- a gap of, for example, 0.5 mm thickness can also be provided between the metal part 15 and the inner wall 7, with the result that a corresponding layer of residues always covers the inner wall 7.
- Such an embodiment has the advantage that the inner wall 7 is protected against signs of corrosion when aggressive gases and / or vapors have to be cooled.
- the metal part 15 is not subjected to high temperatures in the rest position and therefore does not lose its internal strength and dimensional stability, but it does assume the temperature prevailing in the area of the connection piece 9 which forms the outlet of the cooler 2. At the beginning of the screwing movement of the metal part 15 out of the rest position, there is therefore no fear of a temperature shock when the metal part 15 comes into contact with the ceramic part of the cooler 2.
- a prototype of such a device has been successfully put into operation.
- a 1 m long ceramic tube with cemented-in cooling tubes 4 for water cooling is used as the cooler 2.
- the ceramic tube has an inner diameter of 10 cm.
- the metal part 15 consists of an externally suitably ground spiral spring with a constant pitch, of which one and a half turns are used.
- the axially extending shaft 13, with the tip of which the metal part 15 is connected, is made of steel with a 10 mm diameter.
- a gas mixture at a temperature of approximately 1300 ° C. was fed into the device under normal pressure.
- This gas mixture contained 95% air, 2% gaseous heavy metal compounds, especially ZnCl2, PbO, PbCl2 etc., and 3% other parts such as CO2, SO2, etc.
- the device can also be gas-tight if harmful gases and / or vapors are to be cooled, and it is also conceivable to operate it with excess or negative pressure.
- the bushing 12, the flange connection between the discharge opening 16 and the collecting container 17, the slide 18 and the transition between the outer wall 5 of the furnace and the cooler 2 must be made gas-tight and possibly also pressure-tight.
- the cooler 2 is inclined downwards in the direction of the discharge opening 16. This gradient facilitates the removal of the scraped-off residues and prevents liquid condensing material from flowing back into the furnace. Different temperature zones occur in the interior of the cooler 2, and it is entirely conceivable that a certain fraction of the residues is deposited in a particularly high concentration in a certain temperature zone. This fraction can now be removed through an additional discharge opening, not shown. The further processing of the residues is simplified by this fractionally separate discharge.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning In General (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Pipe Accessories (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Electric Cable Installation (AREA)
Abstract
Description
Die Erfindung geht aus von einer Rohrkratzvorrichtung für die während des Betriebs erfolgende Entfernung von an der Innenwand eines heisse Gase und/oder Dämpfe führenden Rohres abgelagerten Rückständen, mit mindestens einer durch eine axial erstreckte Welle betätigbaren Kratzvorrichtung, mit einer Durchführung für die axial erstreckte Welle und mit mindestens einer Austragsöffnung für die entfernten Rückstände.The invention relates to a pipe scraping device for the removal of residues deposited on the inner wall of a hot gas and / or vapor leading pipe during operation, with at least one scraping device which can be actuated by an axially extended shaft, with a bushing for the axially extended shaft and with at least one discharge opening for the removed residues.
Aus einer Zeitschrift (Chem.-Ing.-Techn., Bd. 54, 1982, Seite 382, Abb. 4) ist eine gattungsgemässe Vorrichtung bekannt. Diese Vorrichtung weist eine angetriebene Welle auf, welche verschiedene axial erstreckte Kratzvorrichtungen trägt. Diese Kratzvorrichtungen schaben, wenn sie radial bewegt werden, an der Innenwand sich ablagernde Rückstände ab. Sowohl die zentrale Welle als auch die Kratzvorrichtungen verbleiben stationär im Innenraum der Vorrichtung und werden dauernd von den durch diesen Innenraum strömenden heissen Gasen und/oder Dämpfen beaufschlagt. Diese Vorrichtung kann deshalb nur in einem Temperaturbereich bis wenige 100 °C eingesetzt werden, da bei höheren Temperaturen die Kratzvorrichtungen abschmelzen würden und deshalb ihre Funktion nicht mehr erfüllen könnten. Der Einsatz von temperaturbeständigeren Materialien für die Kratzvorrichtungen, z.B. Keramik, um eine höhere Betriebstemperatur zu erreichen, ist nicht sinnvoll, da diese mechanisch zuwenig belastbar und auch sehr schwierig und teuer zu bearbeiten sind.A generic device is known from a magazine (Chem.-Ing.-Techn., Vol. 54, 1982, page 382, Fig. 4). This device has a driven shaft which carries various axially extending scraping devices. When scraped radially, these scraping devices scrape off residues deposited on the inner wall. Both the central shaft and the scraper devices remain stationary in the interior of the device and are continuously heated by the hot ones flowing through this interior Gases and / or vapors are applied. This device can therefore only be used in a temperature range of up to a few 100 ° C, since the scratching devices would melt at higher temperatures and could therefore no longer fulfill their function. The use of more temperature-resistant materials for the scratching devices, for example ceramics, in order to achieve a higher operating temperature, does not make sense, since these are not mechanically resilient and are also very difficult and expensive to machine.
Aus der FR-A-397.008 ist ein massives Schneidwerkzeug für die Rohrreinigung bekannt, welches während des Schneidevorgangs nahezu den gesamten Rohrquerschnitt verschliesst.
Dieses Schneidwerkzeug ist nicht geeignet für Arbeiten während des Betriebs des zu reinigenden Rohres und auch nicht für den Einsatz bei hohen Temperaturen.A massive cutting tool for pipe cleaning is known from FR-A-397.008, which closes almost the entire pipe cross section during the cutting process.
This cutting tool is not suitable for work during the operation of the pipe to be cleaned and also not for use at high temperatures.
Hier will die Erfindung Abhilfe schaffen. Die Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe, eine Rohrkratzvorrichtung zu schaffen, mit welcher mit einfachen Mitteln Rückstände aus mit Temperaturen über 1300 °C beaufschlagten Bereichen entfernt werden können.The invention seeks to remedy this. The invention, as characterized in the claims, solves the problem of creating a pipe scraping device with which residues can be removed from areas exposed to temperatures above 1300 ° C. with simple means.
Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, dass bekannte Werkstoffe, z.B. Stahl, die vergleichsweise einfach zu bearbeiten sind, eingesetzt werden können. Die Kratzvorrichtung wird periodisch und jeweils nur so Lange im Bereich hoher Temperaturen eingesetzt, dass sie sich nicht nennenswert aufwärmen und damit auch ihre mechanische Festigkeit nicht verlieren kann. Der Temperaturbereich, in welchem diese Vorrichtung arbeitet, kann so mit einfachen Mitteln auf über 1300 °C gesteigert werden.The advantages achieved by the invention are essentially to be seen in the fact that known materials, e.g. Steel that is comparatively easy to machine can be used. The scratching device is used periodically and only for such a long time in the area of high temperatures that it does not warm up appreciably and thus cannot lose its mechanical strength. The temperature range in which this device operates can thus be increased to over 1300 ° C. with simple means.
Die weiteren Ausgestaltungen der Erfindung sind Gegenstände der abhängigen Ansprüche.The further developments of the invention are the subject of the dependent claims.
Die Erfindung, ihre Weiterbildung und die damit erzielbaren Vorteile werden nachstehend anhand der Zeichnung, welche lediglich einen Ausführungsweg darstellt, näher erläutert.The invention, its further development and the advantages which can be achieved thereby are explained in more detail below with reference to the drawing, which only represents one embodiment.
Die einzige Figur zeigt eine Ausführungsform einer erfindungsgemässen Vorrichtung.The single figure shows an embodiment of a device according to the invention.
In der einzigen Figur ist eine erfindungsgemässe Vorrichtung dargestellt. Ein Kühler 2 aus Keramik mit einem zylindrischen Innenraum 3 und in die Wandung eingebetteten Kühlrohren 4 ist an eine Oeffnung in der Aussenwand 5 eines Ofens angeflanscht. Ein Pfeil 6 deutet die Strömungsrichtung heisser Gase und/oder Dämpfe an, die aus dem Ofen austreten und die im Kühler 2 abgekühlt werden. Bei diesem Abkühlvorgang kondensieren bzw. desublimieren Anteile der heissen Gase und/oder Dämpfe und setzen sich an der Innenwand 7 des Kühlers 2 ab. Das abgekühlte Gas verlässt den Kühler 2, wie durch einen Pfeil 8 angedeutet durch einen angeflanschten Stutzen 9. Auf der dem Ofen abgewandten Seite des Kühlers 2 ist in dessen axialer Verlängerung ein zylindrischer Hohlraum 10 vorgesehen, der den gleichen Durchmesser aufweist wie der Kühler 2 und der durch eine Stirnwand 11 abgeschlossen ist. Die Wände dieses Hohlraumes 10 sind beispielsweise aus Stahl gefertigt, eine Keramikauskleidung ist hier wegen der niedrigeren Temperaturen nicht nötig. Im Zentrum dieser Stirnwand 11 ist eine Durchführung 12 für eine drehbare, axial erstreckte Welle 13 angebracht, welche gleichzeitig diese Welle 13 führt. An der Spitze 14 dieser axial erstreckten Welle 13 ist ein Metallteil 15 angebracht, welches in axialer Richtung schraubenförmig gewunden ist und beispielsweise ca. 1 1/2-Windungen aufweist. Dieses formstabile Metallteil 15 bildet die eigentliche Kratzvorrichtung dieser Vorrichtung. Zwischen der in Ruhestellung abgebildeten Kratzvorrichtung und dem mit Kühlrohren 4 versehenen Teil des Kühlers 2 ist unten an der tiefsten Stelle eine Austragsöffnung 16 vorgesehen, an welche ein Auffangbehälter 17 angeflanscht ist. Beim Wechseln des Auffangsbehälters 17 kann die Austragsöffnung 16 mittels eines Schiebers 18 verschlossen werden, der hier lediglich angedeutet ist.A device according to the invention is shown in the single figure. A
Zur Erläuterung der wirkungsweise sei die einzige Figur näher betrachtet. Im Kühler 2 werden die ofenseitig mit mehr als 1300 °C eintretenden heissen Gase und/oder Dämpfe abgekühlt. Bei diesem Abkühlvorgang kondensieren bzw. desublimieren Rückstände und lagern sich an der gekühlten Innenwand 7 des Kühlers 2 ab. Diese Rückstände können in Hüttenwerken erzeugte Rohstoffe sein, es können aber beispielsweise auch Schadstoffe sein, die aus verunreinigten Gas-Dampf-Gemischen entfernt werden. Ferner kann es sich bei diesem Kühler 2 um eine Baugruppe handeln, deren Funktionsfähigkeit durch diese Rückstände beeinträchtigt wird. Zur Entfernung dieser Rückstände wird nun die axial erstreckte Welle 13 durch einen nicht dargestellten Antrieb in Drehbewegung versetzt und gleichzeitig in axialer Richtung verschoben. Der Vorschub und die Drehggeschwindigkeit sind so auf die Steigung der Windungen des Metallteils 15 abgestimmt, dass dieses im rohrförmig ausgebildeten Innenraum 3 des Kühlers korkenzieherartig entgegen der durch den Pfeil 6 angegebenen Strömungsrichtung bewegt wird. Der lichte Strömungsquerschnitt des Kühlers 2 wird dadurch nur unwesentlich verkleinert. Durch diese Schraubbewegung wird vermieden, dass Rückstände von der Innenwand 7 losgekratzt und in Richtung auf die ofenseitige heisse Zone des Kühlers 2 geschoben werden, wo sie wieder schmelzen bzw. verdampfen würden. Sobald die Zone der an der Innenwand 7 abgelagerten Rückstände durchschraubt ist, wird das Metallteil 17 durch die Welle 13 wieder in die Ruhestellung zurückgezogen, kratzt dabei die Rückstände von der Innenwand 7 ab und transportiert sie zu der Austragsöffnung 16. Dieser Bewegungsablauf von der Ruhestellung der Kratzvorrichtung in die heisse Zone und zurück in die Ruhestellung im kühleren Bereich des Rohres erfolgt in vergleichsweise kurzer Zeit, so dass das Metallteil 15 dabei die vorgegebene Grenztemperatur für seine Anwendung nicht erreichen kann. Der Bewegungsablauf wird periodisch wiederholt.The single figure is considered in more detail to explain the mode of operation. In the
Beim Zurückziehen des Metallteils 15 kann die Drehbewegung im gleichen Sinn wie beim korkenzieherartigen Vorwärtsschrauben beibehalten werden, wenn eine besonders gute Kratzwirkung erreicht werden soll. Das Metallteil 15 kann aber auch ohne diese Drehbewegung zurückgezogen werden. Es ist vorteilhaft, wenn die Kante des Metallteils 15, welche beim Kratzvorgang beansprucht wird, besonders scharfkantig angeschliffen und als Kratzkante ausgebildet ist. Bei gewissen Rückständen kann es auch sinnvoll sein diese Kratzkanten zu härten. Das Metallteil 15 kann so gestaltet sein, dass es gerade in den zylindrisch ausgebildeten Innenraum 3 passt, es kann aber auch so in sich federnd ausgebildet sein, dass es mit Federkraft gegen die Innenwand 7 drückt. Auf diese Art ist es möglich auch fester angebackene Rückstände abzukratzen und in den Auffangbehälter 17 zu transportieren. Zwischen dem Metallteil 15 und der Innenwand 7 kann auch ein Spalt von beispielsweise 0,5 mm Dicke vorgesehen sein, was zur Folge hat, dass stets eine entsprechende Schicht von Rückständen die Innenwand 7 bedeckt.Eine derartige Ausführung weist den Vorteil auf, dass die Innenwand 7 vor Korrosionserscheinungen geschützt wird, wenn aggressive Gase und/oder Dämpfe abgekühlt werden müssen.When the
Das Metallteil 15 wird in der Ruhestellung nicht mit hohen Temperaturen beaufschlagt und verliert deshalb seine innere Festigkeit und seine Formbeständigkeit nicht, es nimmt jedoch die Temperatur an, die im Bereich des Stutzens 9 herrscht, der den Ausgang des Kühlers 2 bildet. Am Beginn der Schraubbewegung des Metallteiles 15 aus der Ruhestellung heraus ist deshalb kein Temperaturschock zu befürchten, wenn das Metallteil 15 mit dem aus Keramik bestehenden Teil des Kühlers 2 in Berührung kommt.The
Ein Prototyp einer derartigen Vorrichtung wurde erfolgreich in Betrieb genommen. Als Kühler 2 wird dabei ein 1 m langes Keramikrohr mit eingekitteten Kühlrohren 4 für Wasserkühlung verwendet. Das Keramikrohr weist einen Innendurchmesser von 10 cm auf. Das Metallteil 15 besteht aus einer aussen passend geschliffenen Spiralfeder mit konstanter Steigung, von der eineinhalb Windungen verwendet werden. Die axial erstreckte Welle 13, mit deren Spitze das Metallteil 15 verbunden ist, ist aus Stahl mit 10 mm Durchmesser gefertigt.A prototype of such a device has been successfully put into operation. A 1 m long ceramic tube with cemented-in cooling tubes 4 for water cooling is used as the
In die Vorrichtung wurde von einem Ofen ca. 1300 °C heisses Gasgemisch unter Normaldruck eingespeist. Dieses Gasgemisch enthielt 95 % Luft, 2 % gasförmige Schwermetallverbindungen, vor allem ZnCl₂, PbO, PbCl₂ usw., und 3 % weitere Anteile wie CO₂, SO₂, usw. Die Schwermetallverbindungen lagerten sich an der Innenwand 7 des Kühlers 2 ab und wurden als Pulver ausgetragen zur weiteren Verarbeitung.A gas mixture at a temperature of approximately 1300 ° C. was fed into the device under normal pressure. This gas mixture contained 95% air, 2% gaseous heavy metal compounds, especially ZnCl₂, PbO, PbCl₂ etc., and 3% other parts such as CO₂, SO₂, etc. The heavy metal compounds deposited on the inner wall 7 of the
Die Vorrichtung kann auch, wie dies beim obigen Prototyp der Fall ist, gasdicht ausgeführt werden, wenn schädliche Gase und/oder Dämpfe abgekühlt werden sollen, ebenso ist es denkbar sie mit Ueber- oder Unterdruck zu betreiben. Für diese Fälle müssen die Durchführung 12, die Flanschverbindung zwischen Austragsöffnung 16 und Auffangbehälter 17, der Schieber 18 und der Uebergang zwischen der Aussenwand 5 des Ofens und dem Kühler 2 gasdicht und ggf. auch druckdicht ausgeführt werden.As is the case with the above prototype, the device can also be gas-tight if harmful gases and / or vapors are to be cooled, and it is also conceivable to operate it with excess or negative pressure. For these cases, the bushing 12, the flange connection between the discharge opening 16 and the
Der Kühler 2 ist in Richtung auf die Austragsöffnung 16 abwärts geneigt. Dieses Gefälle erleichtert die Austragung der abgekratzten Rückstände und verhindert, dass flüssig kondensierendes Material in den Ofen zurückfliessen kann. Im Innenraum des Kühlers 2 treten verschiedene Temperaturzonen auf, und es ist durchaus denkbar, dass in einer bestimmten Temperaturzone eine bestimmte Fraktion der Rückstände besonders hoch konzentriert abgelagert wird. Diese Fraktion kann nun durch eine nicht dargestellte, zusätzliche Austragsöffnung entfernt werden. Die weitere Aufbereitung der Rückstände wird durch diese fraktionsweise getrennte Austragung vereinfacht.The
Es ist auch denkbar derartige Vorrichtungen in von heissen Flüssigkeiten durchströmten Anordnungen einzusetzen, um kritische Bereiche von Ablagerungen, welche den Strömungsquerschnitt unzulässig einengen, zu befreien.It is also conceivable to use such devices in arrangements through which hot liquids flow in order to free critical areas from deposits which impermissibly restrict the flow cross section.
Claims (8)
- Pipe-scraping device for the removal during operation of residues deposited on the inside wall (7) of a pipe carrying hot gases and/or vapours, having at least one scraping device which can be operated by an axially extending shaft (13), having a passage (12) for the shaft (13) and having at least one discharge opening (16) for the residues removed, characterised- in that the at least one scraping device has at least one metal part (15) wound helically in axial direction and connected to the shaft (13),- in that the shaft (13) is guided axially displaceably,- in that the shaft (13) is driven such that the metal part (15) is screwed into the pipe in the manner of a corkscrew, and- in that the metal part (15) can be withdrawn from the pipe by the shaft (13) without rotational movement or rotating in the same sense as during the screwing in.
- Device according to Claim 1, characterised- in that the metal part (15) presses resiliently against the inside wall (7) or bears against the latter or in that a gap is formed between the inside wall (7) and the metal part (15),- in that the metal part (15) has at least one winding, and- in that it is arranged together with the shaft (13) such that, in the state of rest, a harmful impingement by the hot gases or vapours is not possible.
- Device according to Claim 1, characterised- in that the metal part (15) is wound with constant pitch, and- in that it is connected at least to the tip (14) of the central shaft (13).
- Device according to Claim 1, characterised
- in that the axis of the pipe runs downwards in the direction of the at least one discharge opening (16). - Device according to Claim 1, characterised
- in that the pipe is a chiller (2), preferably made of ceramic material with inserted or cemented-in chilling tubes (4). - Device according to Claim 1, characterised
- in that gases and/or vapours at temperatures of up to 1300°C and above are introduced into the pipe on the side remote from the at least one discharge opening (16). - Device according to Claim 1, characterised
- in that the pipe has, offset in axial direction, at least a second discharge opening. - Device according to at least one of the preceding Claims 1 to 7, characterised
- in that the device is of a gas-tight configuration and can be operated with positive pressure or normal pressure or negative pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89108450T ATE85245T1 (en) | 1988-05-27 | 1989-05-11 | PIPE SCRAPING DEVICE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2034/88 | 1988-05-27 | ||
| CH2034/88A CH677739A5 (en) | 1988-05-27 | 1988-05-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0343434A1 EP0343434A1 (en) | 1989-11-29 |
| EP0343434B1 true EP0343434B1 (en) | 1993-02-03 |
Family
ID=4224377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89108450A Expired - Lifetime EP0343434B1 (en) | 1988-05-27 | 1989-05-11 | Seraping device for pipes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4986347A (en) |
| EP (1) | EP0343434B1 (en) |
| AT (1) | ATE85245T1 (en) |
| CH (1) | CH677739A5 (en) |
| DE (1) | DE58903430D1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0359931B1 (en) * | 1988-09-05 | 1993-03-31 | Asea Brown Boveri Ag | Process and apparatus for separating vaporous heavy metal compounds from a carrier gas |
| US5070568A (en) * | 1990-03-05 | 1991-12-10 | Orville L. Wilcox | Cleaning device for cleaning nozzle and welding tip of a wire feed electrical arc welder |
| EP0682764B1 (en) * | 1993-02-12 | 1999-08-11 | L David Ostlie | Stacked cooling grate and system for providing thermal power for a power plant |
| DE19641629A1 (en) * | 1996-10-09 | 1997-10-23 | Siemens Ag | Device for cleaning pipeline transporting dust-laden gases, e.g. combustion gases |
| KR20020031823A (en) * | 2000-10-24 | 2002-05-03 | 김동수 | Exhaust gas delivering pipe with cleaning device |
| CN100376859C (en) * | 2003-06-13 | 2008-03-26 | 株洲工学院帅科机械清洗研究所 | Heat-transfer fluid power plastic helical dirt cleaning torque reinforcing method |
| GB0326707D0 (en) * | 2003-11-17 | 2003-12-17 | Boc Group Plc | Exhaust gas treatment |
| CN1657189B (en) * | 2004-02-16 | 2010-05-12 | 湖南工业大学 | Power moment strengthening apparatus for fixing device for rotary cleaning element removing dirt inside pipe |
| JP5824906B2 (en) | 2011-06-24 | 2015-12-02 | 昭栄化学工業株式会社 | Plasma device for producing metal powder and method for producing metal powder |
| EP3015810A1 (en) * | 2014-10-30 | 2016-05-04 | Vesta Srl | Stove provided with a heat exchanger with turbulators |
| CN105347400B (en) * | 2015-12-04 | 2016-11-09 | 湖北中澳纳米材料技术有限公司 | A kind of device and method producing high-purity nm molybdenum trioxide |
| CN107030292A (en) * | 2017-05-03 | 2017-08-11 | 江苏天楹环保能源成套设备有限公司 | A kind of multistage cooling prepares the plasma atomising device of metal dust |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE46485C (en) * | P. STEMPEL in Aachen, Wespienstrafse 33 | Spring-loaded, helical water pipe cleaner | ||
| FR397008A (en) * | 1908-11-20 | 1909-04-27 | Paul Montravel Tennick | Improvements made to apparatus intended to remove encrustations from the inside of tubes, pipes or the like |
| US1690434A (en) * | 1926-12-21 | 1928-11-06 | Rockelman Louis | Boiler-pipe cleaner |
| US3410335A (en) * | 1965-02-13 | 1968-11-12 | Svenska Carbon Black Aktiebola | Coolers for mixtures of gases and solid particles |
| JPS52129714A (en) * | 1976-04-24 | 1977-10-31 | Kurosaki Refractories Co | Refractories compounded with silicaaadded fused alumina |
| JPS5945032B2 (en) * | 1977-04-20 | 1984-11-02 | 三井造船株式会社 | Sensible heat recovery equipment for coke oven gas |
| JPS5535912A (en) * | 1978-09-06 | 1980-03-13 | Mitsui Toatsu Chemicals | Pipe inside scratchinggoff device |
| JPS6129699A (en) * | 1984-07-23 | 1986-02-10 | Nitto Boseki Co Ltd | Heat exchanger for high temperature dust containing gas |
| JPH06129699A (en) * | 1992-10-13 | 1994-05-13 | Taikisha Ltd | Conditioned air diffuser |
-
1988
- 1988-05-27 CH CH2034/88A patent/CH677739A5/de not_active IP Right Cessation
-
1989
- 1989-05-11 AT AT89108450T patent/ATE85245T1/en not_active IP Right Cessation
- 1989-05-11 DE DE8989108450T patent/DE58903430D1/en not_active Expired - Fee Related
- 1989-05-11 EP EP89108450A patent/EP0343434B1/en not_active Expired - Lifetime
- 1989-05-30 US US07/358,621 patent/US4986347A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CH677739A5 (en) | 1991-06-28 |
| ATE85245T1 (en) | 1993-02-15 |
| DE58903430D1 (en) | 1993-03-18 |
| EP0343434A1 (en) | 1989-11-29 |
| US4986347A (en) | 1991-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0343434B1 (en) | Seraping device for pipes | |
| DE2831199C3 (en) | Cryosurgical device | |
| EP0000001B1 (en) | Thermal heat pump | |
| DE3205366C2 (en) | Discharge device for a rotary kiln | |
| DE10229406A1 (en) | Device for the continuous filtering of material mixtures | |
| EP0703288B1 (en) | Heating vessel for solid materials equipped with heating tubes | |
| DE3741112A1 (en) | IMPROVED PYROLIZING AND / OR DRYING UNIT FOR BIOLOGICAL SLUDGE OR THE LIKE | |
| DE4433039A1 (en) | Fixed mixer vessel and inner rotor blade assembly of conical shape | |
| EP1622706B1 (en) | Mixing device, and mixing method using that device | |
| DE3006721A1 (en) | DEVICE FOR CLEANING COMBUSTION CHAMBERS | |
| DE4114334A1 (en) | THICK FILM EVAPORATOR MADE OF CORROSION-RESISTANT MATERIAL | |
| EP2384374A1 (en) | Tube target | |
| DE3830678C2 (en) | ||
| DE2833620C2 (en) | Rake of a sludge separator | |
| WO2019214849A1 (en) | Condensate extraction device and heat exchanger | |
| EP3320320B1 (en) | Liquid-cooled gas sampling probe | |
| DE69029809T2 (en) | HEAT EXCHANGER | |
| DE3400522A1 (en) | Fountain pen having a writing tube | |
| DE10012369B4 (en) | Process for removing condensable, liquefied solids with a clearing punch | |
| DE202004008737U1 (en) | Oil cooling heat exchanger has outer pipe with helical rectangular section wire flute defining flow chamber with inner pipe | |
| DE3042146C2 (en) | Rotary kiln for drying and de-oiling oil sand or oil shale | |
| DE20210115U1 (en) | Filter for continuous filtration of contaminants in material mixtures, especially plastic melts, has a rotatable filter with a stripper and conveyer system for contaminant removal | |
| DE630289C (en) | Device for the distillation of zinc and similar metals | |
| DE202024100133U1 (en) | Silicon monoxide deposit recovery furnace | |
| DE8617098U1 (en) | Rotary tube heat exchanger |
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 |
Kind code of ref document: A1 Designated state(s): AT CH DE LI |
|
| 17P | Request for examination filed |
Effective date: 19900518 |
|
| 17Q | First examination report despatched |
Effective date: 19911004 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT CH DE LI |
|
| REF | Corresponds to: |
Ref document number: 85245 Country of ref document: AT Date of ref document: 19930215 Kind code of ref document: T |
|
| REF | Corresponds to: |
Ref document number: 58903430 Country of ref document: DE Date of ref document: 19930318 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PUE Owner name: ABB GADELIUS KK |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PFA Free format text: ABB K.K. |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: ASEA BROWN BOVERI AG ABT. TEI-IMMATERIALGUETERRECH |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19980420 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19980422 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19980430 Year of fee payment: 10 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19990511 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19990531 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19990531 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000301 |