EP1306140B1 - Cleaning process for pipes. - Google Patents

Cleaning process for pipes. Download PDF

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Publication number
EP1306140B1
EP1306140B1 EP02023430A EP02023430A EP1306140B1 EP 1306140 B1 EP1306140 B1 EP 1306140B1 EP 02023430 A EP02023430 A EP 02023430A EP 02023430 A EP02023430 A EP 02023430A EP 1306140 B1 EP1306140 B1 EP 1306140B1
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EP
European Patent Office
Prior art keywords
cleaning agent
cleaning
waste water
wastewater
pressure
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EP02023430A
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German (de)
French (fr)
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EP1306140B8 (en
EP1306140A1 (en
Inventor
Helmut Ötinger
Axel Bohatsch
Frank Magdeburg
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Oetinger Helmut En Bohatsch Axel En Magdeburg F
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Individual
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    • 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
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0322—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid in combination with a plug, e.g. inflatable mole, to isolate a part of the tube
    • 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
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/057—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices being entrained discrete elements, e.g. balls, grinding elements, brushes

Definitions

  • the invention relates to a method for cleaning pipelines, in particular sewers according to the preamble of claim 1.
  • Such methods are used to clean the inner wall of pipelines.
  • Such pipelines may be penstocks in a sewerage network.
  • the wastewater network consists of pumping and collecting stations and represents the connection between the formation and the treatment of domestic and industrial wastewater via the pipeline network.
  • the long residence time of the wastewater and the deposits in the sewage network favors the formation of a layer known as Sielhaut on the inner wall of the pipelines which is colonized by microorganisms.
  • Microbiological conversion processes produce sulfides that can escape from the wastewater in the form of hydrogen sulfide.
  • the hydrogen sulfide has adverse properties. For one thing, hydrogen sulfide is extremely foul-smelling and harmful to health. Of these, the surrounding residential areas but also the repair and maintenance staff of water companies are severely affected.
  • the cleaning body is as one or more one-piece rotationally symmetrical body made of rigid or elastic, dissolvable material with two annular cylindrical contact surfaces executed. The distance between the contact surfaces is smaller than the inner tube diameter and is formed by a body waist whose smallest cross section is 70% of the inner tube diameter.
  • the outer end of the cleaning body is formed in each case by a frusto-conical and a pointed cone-shaped section, these being connected to the two annular-cylindrical contact surfaces and to the sides remote from the body waist.
  • the width and diameter of the two annular cylindrical contact surfaces are matched to the pipeline to be cleaned.
  • the special shape of the cleaning body is also considered disadvantageous - the shape and dimensions must be matched in advance exactly to the pipeline to be cleaned. This entails a high outlay for producing and providing the cleaning body at the work site.
  • the invention is therefore based on the object to develop a generic method for cleaning pipelines, which is adaptable without special shaping of each pipe diameter and - cross section and also allows the cleaning of long pipe sections.
  • the pressure applied to the cleaning agent is adaptable, so that the material removal between the inner wall of the pipeline and the cleaning agent is balanced.
  • the pressure can be applied both by the internal system pressure or by an external pressure generator.
  • the duration of the cleaning action can be adapted to the length of the pipeline if a corresponding large pipeline section can be blocked and filled with cleaning agent, the volume of the reservoir for cleaning agent being greater than or at least equal to the volume of the delimited pipeline section.
  • the filling of the delimited pipe section is particularly effective when it is previously emptied and the filling is controlled by means of a metering pump.
  • High cleaning effect at correspondingly low self-dissolution is by granulated detergent, which is completely or partially dissolvable in the transport medium and consists of round or square shaped bodies, on the one hand ensure good interleaving with each other and on the other hand, a close contact with the inner wall of the pipe.
  • the cleaning is particularly effective when using a mixture of granulated ice with an addition of organic ingredients, such as straw or inorganic components such as liquid detergents.
  • the cleaning of different pipe diameters and different length of the reed line is particularly noticeable as an advantage.
  • An unspecified sewer network consists of several pumping and collecting stations, which are connected by pipes.
  • a wastewater feed line 1 which opens into a conventional wastewater storage 2 and a waste water discharge line 3, is shown in the pipeline network.
  • the waste water discharge line 3 is delimited at one end by an air compressor 4 and a backflow preventer 5.
  • the backwater protection 5 closes the wastewater discharge line 3 via a flap mechanism, not shown, automatically in the direction of the air compressor 4, the opposite direction is open.
  • a backflow safety device 6 is also introduced into the sewage drain line 3.
  • the backflow safety device 6 automatically blocks the wastewater discharge line 3 via a flap mechanism, not shown, in the direction of the air compressor 4. In the direction of the sewage network, not shown, the backflow safety device 6 is open.
  • Both the waste water feed line 1 and the waste water discharge line 3 are designed as conventional pressure pipes. But it is also possible that the sewage supply line 1 is designed as a simple Freige projecttechnisch.
  • a further backflow 13 is introduced, which automatically closes the sewage conveyor line 7 in the direction of the sewage pump 8 via a flap mechanism, not shown.
  • the opposite direction from the sewage pump 8 to the wastewater discharge line 3 is open as soon as the sewage pump 8 generates a delivery pressure.
  • the backflow preventer 10 which is arranged in the detergent feed line 9 near the mouth in the waste water discharge line 3, automatically closes via a flap mechanism, not shown, in the direction of the detergent feed pump 11 and the storage container 12 arranged above it, the opposite direction being open.
  • the pipe lock 14 is equipped with an electrically operated drain valve 15.
  • the drain valve 15 connects in the open state, the waste water discharge line 3 with the waste water storage 2.
  • the volume of the pipe lock 14 is smaller than the volume of filled with detergent 16 reservoir 12.
  • the detergent 16 is made of a solid and informal, preferably granulated material mixture, which dissolves in the transport medium.
  • the cleaning agent 16 has a preferably prismatic shape and a size that allows both good interleaving with each other and good contact with the inner wall of the wastewater discharge line 3.
  • the size of the cleaning agent 16 is also to be dimensioned so that the self-dissolution is as low as possible.
  • the detergent 16 here consists of granulated ice, the organic components added in the form of straw alternated are. But there are also inorganic admixtures, for example with liquid cleaner possible.
  • the ice is produced either from drinking water of different purity or also from the transport medium, the waste water itself.
  • any other granulated material which can be dissolved in the transport medium can be used.
  • the use of non-dissolvable detergent 16 in granular form or a mixture of dissolvable and insoluble components is possible.
  • a device for separating the transport and cleaning agent should be provided after completion of the cleaning.
  • the sewage pump 8 conveys the wastewater located in the wastewater 2 wastewater discharge line 3 and presses the detergent 16 together until a close contact between detergent 16 and the inner wall of the waste water discharge line is made.
  • the backflow preventer 6 opens as soon as the back pressure of the wastewater located in the wastewater discharge line 3 is overcome. Due to the still funded wastewater, the detergent 16 is pushed through the waste water drain line 3 therethrough. The maintenance of the transport pressure takes over, after complete emptying of the wastewater storage tank 2, the air compressor 4, the wastewater and cleaning agent 16 transported to the end of the wastewater discharge line 3, not shown.
  • the cleaning agent 16 is pressed against the inner wall of the waste water discharge line 3, so that during simultaneous transport movement cleaning by scraping many granules of the cleaning agent 16 takes place on the inner wall of the waste water discharge line 3. 3, while maintaining the cleaning pressure of the granules of the detergent 16 on the inner wall of the waste water drain line 3, the amount of detergent 16 on the decreasing volume constantly by cleaning wear and self-dissolution.
  • the volume of the cleaning agent 16 at the beginning of the cleaning is such that, despite cleaning wear and self-dissolution, the cleaning of the waste water discharge line 3 takes place over the entire length even with different pipe diameters.
  • the flow rate and thus the transport pressure is variable and it thus results in a change in the cleaning effect.
  • An increase in the transport pressure has a reinforcing effect on the cleaning action of the cleaning agent 16.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Cleaning In General (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Sewage (AREA)
  • Detergent Compositions (AREA)

Abstract

Cleaning of pipelines, especially drains, comprises blocking a drainpipe (3) filled with sewage, emptying the blocked pipeline section, and filling the section with a solid and formless cleaning agent (16). The cleaning agent is pressurized to form a block which lies against the inner wall of the drainpipe and is transported through the drainpipe. <??>Independent claims are also included for a device for cleaning pipelines and for a cleaning agent. Preferred Features: The pressure exerted on the cleaning agent is selected so that the material removal is uniform between the inner wall and the cleaning agent. The cleaning agent is granulated ice mixed with an organic component, e.g. straw, or an inorganic component, e.g. a liquid cleaner.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Reinigen von Rohrleitungen, insbesondere Abwasserleitungen nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for cleaning pipelines, in particular sewers according to the preamble of claim 1.

Derartige Verfahren werden zum Reinigen der Innenwandung von Rohrleitungen eingesetzt. Solche Rohrleitungen können Druckrohrleitungen in einem Abwassernetz sein.Such methods are used to clean the inner wall of pipelines. Such pipelines may be penstocks in a sewerage network.

Das Abwassernetz besteht aus Pump- und Sammelstationen und stellt über das Rohrleitungsnetz die Verbindung von der Entstehung bis zur Aufbereitung häuslicher und industrieller Abwässer dar. Die hohe Verweildauer des Abwassers und der Ablagerungen im Abwassernetz begünstigt die Entstehung einer als Sielhaut bekannten Schicht an der Innenwandung der Rohrleitungen, die von Mikroorganismen besiedelt wird. Durch mikrobiologische Umwandlungsprozesse entstehen Sulfide, die in Form von Schwefelwasserstoff aus dem Abwasser entweichen können.The wastewater network consists of pumping and collecting stations and represents the connection between the formation and the treatment of domestic and industrial wastewater via the pipeline network. The long residence time of the wastewater and the deposits in the sewage network favors the formation of a layer known as Sielhaut on the inner wall of the pipelines which is colonized by microorganisms. Microbiological conversion processes produce sulfides that can escape from the wastewater in the form of hydrogen sulfide.

Der Schwefelwasserstoff hat nachteilige Eigenschaften. Zum einen ist Schwefelwasserstoff äußerst übelriechend und gesundheitsschädigend. Davon sind die umliegenden Wohngebiete aber auch das Reparatur- und Wartungspersonal der Wasserwirtschaftsbetriebe stark betroffen.The hydrogen sulfide has adverse properties. For one thing, hydrogen sulfide is extremely foul-smelling and harmful to health. Of these, the surrounding residential areas but also the repair and maintenance staff of water companies are severely affected.

Zum anderen ist Schwefelwasserstoff, der sich durch biochemische Vorgänge zu hochaggressiver Schwefelsäure umwandelt, die Ursache für die biochemischer Korrosion. Hierbei werden Beton- und Metallelemente, insbesondere in Abwassersammel- und Kontrollschächten stark angegriffen und in kürzester Zeit unbrauchbar. Bei Erreichung einer kritischen Korrosionstiefe kann das Abwasserbauwerk dabei bis zum Einsturz gefährdet sein. Dadurch entstehen wirtschaftliche Schäden in erheblicher Größenordnung.On the other hand, hydrogen sulfide, which turns into highly aggressive sulfuric acid through biochemical processes, is the cause of biochemical corrosion. This concrete and metal elements, especially in sewage collection and Inspection shafts heavily attacked and useless in no time. If a critical corrosion depth is reached, the wastewater structure may be at risk until it collapses. This causes economic damage of considerable magnitude.

Korrosion und Geruchsbelästigung stehen somit in kausalem Zusammenhang mit der durch Mikroorganismen besiedelten Sielhaut an den Innenwänden von Rohrleitungen. Damit kommt der Beseitigung der Sielhaut an der Innenwandung von Rohrleitungen eine große Bedeutung zu.Corrosion and odor are thus causally related to the colonized by microorganisms Sielhaut on the inner walls of pipelines. Thus, the removal of the Sielhaut on the inner wall of pipes is of great importance.

Zum Reinigen der Innenwandung von Rohrleitungen sind verschiedene Reinigungsverfahren und entsprechende Reinigungskörper entwickelt worden, die zumeist Kugel- oder Zylinderform aufweisen und die mit auf der Oberfläche haftendem Schleif- oder Reinigungsmittel versehen sind. Für die Reinigung der Innenwandung gebogener Rohrleitungen sind biegsam verbundene Reinigungskörper vorgestellt worden. In immer gleichen Verfahrensabläufen werden die Reinigungskörper von unterschiedlich gestalteten Sendestationen in die Rohrleitung eingebracht und bewegen sich entweder über Gefällewirkung oder durch Druckbeaufschlagung zur Reinigung durch die Rohrleitung bis zu unterschiedlich gestalteten Entnahmestationen. Dort werden die Reinigungskörper aus der Rohrleitung entfernt. Die Reinigungswirkung wird durch den Kontakt des Reinigungskörpers oder Teile des Reinigungskörpers mit der Innenwandung der Rohrleitung sichergestellt. Verunreinigungen, die an der Innenwandung der Rohrleitung anhaften, werden dabei abgeschabt.For cleaning the inner wall of pipelines, various cleaning methods and corresponding cleaning bodies have been developed, which usually have a spherical or cylindrical shape and which are provided with abrasive or cleaning agents adhering to the surface. For the cleaning of the inner wall of bent pipes flexibly connected cleaning bodies have been presented. In always the same procedures, the cleaning body of differently shaped transmitting stations are introduced into the pipeline and move either by slope action or by pressurization for cleaning through the pipeline to differently shaped removal stations. There the cleaning bodies are removed from the pipeline. The cleaning effect is ensured by the contact of the cleaning body or parts of the cleaning body with the inner wall of the pipeline. Contaminants adhering to the inner wall of the pipeline are scraped off.

Mit der OS DE 195 34 804 A1 ist ein Verfahren vorgestellt worden, bei dem Rohrleitungen gereinigt werden, wenn diese nicht über eine Entnahmestation verfügen. Dies wird durch die Verwendung von auflösbaren Reinigungskörpern möglich. Diese Reinigungskörper verfügen über die Eigenschaft, sich innerhalb des Rohrleitungsnetzes im eigentlichen Transportgut aufzulösen.
Der Reinigungskörper ist als ein oder mehrere einteilige rotationssymmetrische Körper aus starrem oder elastischem, auflösbarem Werkstoff mit zwei ringzylindrischen Kontaktflächen ausgeführt. Der Abstand der Kontaktflächen ist dabei kleiner als der Rohrinnendurchmesser und wird durch eine Körpertaille gebildet, deren kleinster Querschnitt 70% des Rohrinnendurchmessers beträgt. Den äußeren Abschluss des Reinigungskörpers bilden je ein kegelstumpfförmiger und ein spitzkegeliger Abschnitt, wobei diese an den zwei ringzylindrischen Kontaktflächen und an der der Körpertaille abgewandten Seiten angeschlossen sind. Dabei sind Breite und Durchmesser der zwei ringzylindrischen Kontaktflächen auf die zu reinigende Rohrleitung abgestimmt.With the OS DE 195 34 804 A1 a method has been presented in which pipes are cleaned, if they do not have a removal station. This is made possible by the use of dissolvable cleaning bodies. These cleaning bodies have the property of dissolving within the pipeline network in the actual cargo.
The cleaning body is as one or more one-piece rotationally symmetrical body made of rigid or elastic, dissolvable material with two annular cylindrical contact surfaces executed. The distance between the contact surfaces is smaller than the inner tube diameter and is formed by a body waist whose smallest cross section is 70% of the inner tube diameter. The outer end of the cleaning body is formed in each case by a frusto-conical and a pointed cone-shaped section, these being connected to the two annular-cylindrical contact surfaces and to the sides remote from the body waist. In this case, the width and diameter of the two annular cylindrical contact surfaces are matched to the pipeline to be cleaned.

Während der Reinigung wird der Reinigungskörper und besonders die im Eingriff stehenden zwei ringzylindrischen Kontaktflächen mechanisch beansprucht. Der Durchmesser und die Breite der zwei ringzylindrischen Kontaktflächen verringern sich während der Bearbeitung stetig, besonders dann, wenn der Reinigungskörper aus gefrorcnem Wasser besteht. Hierbei wird die Verringerung der Maße des Reinigungskörpers durch einen vorhandenen Temperaturunterschied noch verstärkt. Die Reinigungswirkung lässt nach. Dieser nachteilige Umstand wird besonders bei der Reinigung langer Rohrleitungsabschnitte deutlich.During cleaning, the cleaning body and especially the engaging two annular cylindrical contact surfaces are mechanically stressed. The diameter and width of the two annular cylindrical contact surfaces decrease steadily during machining, especially when the cleaning body is made of frozen water. Here, the reduction in the dimensions of the cleaning body is reinforced by an existing temperature difference. The cleaning effect subsides. This disadvantageous circumstance becomes particularly clear when cleaning long pipe sections.

Die spezielle Formgebung des Reinigungskörpers wird gleichfalls als nachteilig gewertet - die Form und die Abmessungen müssen bereits im Vorfeld exakt auf die zu reinigende Rohrleitung abgestimmt sein. Dies zieht einen hohen Aufwand zur Herstellung und Bereitstellung der Reinigungskörper am Arbeitsort nach sich.The special shape of the cleaning body is also considered disadvantageous - the shape and dimensions must be matched in advance exactly to the pipeline to be cleaned. This entails a high outlay for producing and providing the cleaning body at the work site.

Der Erfindung liegt daher die Aufgabe zu Grunde, ein gattungsgemäßes Verfahren zur Reinigung von Rohrleitungen zu entwickeln, das ohne spezielle Formgebung an jeden Rohrdurchmesser und - querschnitt anpassbar ist und auch die Reinigung langer Rohrleitungsabschnitte ermöglicht.The invention is therefore based on the object to develop a generic method for cleaning pipelines, which is adaptable without special shaping of each pipe diameter and - cross section and also allows the cleaning of long pipe sections.

Die Aufgabe wird bezogen auf das neue Verfahren durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst, wobei zweckdienliche Ausgestaltungen in den Unteransprüchen 2 und 3 ausgeführt sind.The object is achieved in relation to the new method by the characterizing features of claim 1, wherein expedient embodiments are set forth in the subclaims 2 and 3.

Das erfindungsmäßige Verfahren beseitigt die genannten Nachteile des Standes der Technik.The process according to the invention eliminates the disadvantages of the prior art.

Von Vorteil ist, wenn der das Reinigungsmittel beaufschlagende Druck anpassbar ist, damit der Materialabtrag zwischen der Innenwandung der Rohrleitung und dem Reinigungsmittel ausgeglichen ist. Dabei kann der Druck sowohl durch den internen Systemdruck oder durch einen externen Druckerzeuger aufgebracht werden.It is advantageous if the pressure applied to the cleaning agent is adaptable, so that the material removal between the inner wall of the pipeline and the cleaning agent is balanced. In this case, the pressure can be applied both by the internal system pressure or by an external pressure generator.

Trotz Reinigungsverschleiß und Selbstauflösung lässt sich die Dauer der Reinigungswirkung an die Länge der Rohrleitung anpassen, wenn ein entsprechender großer Rohrleitungsabschnitt sperrbar und mit Reinigungsmittel füllbar ist, wobei das Volumen des Vorratsbehälters für Reinigungsmittel größer oder mindestens gleich dem Volumen des abgegrenzten Rohrleitungsabschnitts ist. Das Befüllen des abgegrenzten Rohrleitungsabschnitts erfolgt besonders effektiv, wenn dieser vorher entleert und das Befüllen mittels einer Dosierpumpe gesteuert wird.Despite cleaning wear and self-dissolution, the duration of the cleaning action can be adapted to the length of the pipeline if a corresponding large pipeline section can be blocked and filled with cleaning agent, the volume of the reservoir for cleaning agent being greater than or at least equal to the volume of the delimited pipeline section. The filling of the delimited pipe section is particularly effective when it is previously emptied and the filling is controlled by means of a metering pump.

Hohe Reinigungswirkung bei entsprechend geringer Selbstauflösung wird durch granuliertes Reinigungsmittel, welches vollständig oder teilweise im Transportmedium auflösbar ist und aus runden oder eckigen Formkörpern besteht, die einerseits eine gute Verschachtelung untereinander und andererseits einen engen Kontakt mit der Innenwandung der Rohrleitung sicherstellen. Die Reinigung erfolgt besonders effektiv, bei Verwendung eines Gemischs aus granuliertem Eis mit einer Beigabe von organischen Bestandteilen, wie gehechseltem Stroh oder anorganischen Bestandteilen, wie Flüssigreinigern.High cleaning effect at correspondingly low self-dissolution is by granulated detergent, which is completely or partially dissolvable in the transport medium and consists of round or square shaped bodies, on the one hand ensure good interleaving with each other and on the other hand, a close contact with the inner wall of the pipe. The cleaning is particularly effective when using a mixture of granulated ice with an addition of organic ingredients, such as straw or inorganic components such as liquid detergents.

Bei der Anwendung des erfindungsmäßigen Reinigungsmittels ist besonders die Reinigung unterschiedlicher Rohrdurchmesser und verschiedener Rehrleitungslänge als Vorteil auffällig.When using the cleaning agent according to the invention, the cleaning of different pipe diameters and different length of the reed line is particularly noticeable as an advantage.

Die Erfindung soll anhand eines Ausführungsbeispiels näher erläutert werden. Dazu zeigen:

Fig. 1
eine schematische Darstellung eines Teils eines beliebigen Abwassernetzes mit einer Einrichtung zur Reinigung und in
Fig. 2
die um einen mit Reinigungsmittel gefüllten Rohrleitungsabschnitt erweiterte Fig. 1,
Fig. 3
eine schematische Darstellung der Veränderung der Menge des Reinigungsmittels während der Bearbeitungszeit.
The invention will be explained in more detail with reference to an embodiment. To show:
Fig. 1
a schematic representation of part of any wastewater network with a device for cleaning and in
Fig. 2
FIG. 1, which shows a pipeline section filled with detergent, FIG.
Fig. 3
a schematic representation of the change in the amount of cleaning agent during the processing time.

Ein nicht näher dargestelltes Abwassernetz besteht aus mehreren Pump- und Sammelstationen, die über Rohrleitungen verbunden sind.
Gemäß Fig. 1 ist aus dem Rohrleitungsverbund eine Abwasser-Zulaufleitung 1, die in einen üblichen Abwasserspeicher 2 mündet und eine Abwasser-Ablaufleitung 3 dargestellt. Die Abwasser-Ablaufleitung 3 wird an einem Ende von einem Luftverdichter 4 und einer Rückstausicherung 5 begrenzt. Die Rückstausicherung 5 schließt dabei die Abwasser-Ablaufleitung 3 über einen nicht dargestellten Klappenmechanismus automatisch in Richtung des Luftverdichters 4, die Gegenrichtung ist offen. Am gegenüberliegenden Ende ist in die Abwasser-Ablaufleitung 3 gleichfalls eine Rückstausicherung 6 eingebracht. Die Rückstausicherung 6 sperrt dabei die Abwasser-Ablaufleitung 3 über einen nicht dargestellten Klappenmechanismus automatisch in Richtung des Luftverdichters 4. In Richtung des nicht näher dargestellten Abwassernetzes ist die Rückstausicherung 6 offen. Sowohl die Abwasser-Zulaufleitung 1 als auch die Abwasser-Ablaufleitung 3 sind als herkömmliche Druckrohrleitungen ausgeführt. Es ist aber auch möglich, dass die Abwasser-Zulaufleitung 1 als einfache Freigefälleleitung ausgeführt ist.An unspecified sewer network consists of several pumping and collecting stations, which are connected by pipes.
According to FIG. 1, a wastewater feed line 1, which opens into a conventional wastewater storage 2 and a waste water discharge line 3, is shown in the pipeline network. The waste water discharge line 3 is delimited at one end by an air compressor 4 and a backflow preventer 5. The backwater protection 5 closes the wastewater discharge line 3 via a flap mechanism, not shown, automatically in the direction of the air compressor 4, the opposite direction is open. At the opposite end of a backflow safety device 6 is also introduced into the sewage drain line 3. The backflow safety device 6 automatically blocks the wastewater discharge line 3 via a flap mechanism, not shown, in the direction of the air compressor 4. In the direction of the sewage network, not shown, the backflow safety device 6 is open. Both the waste water feed line 1 and the waste water discharge line 3 are designed as conventional pressure pipes. But it is also possible that the sewage supply line 1 is designed as a simple Freigefälleleitung.

In den Abschnitt der Abwasser-Ablaufleitung 3 zwischen der Rückstausicherung 5 und der Rückstausicherung 6 mündet sowohl eine Abwasser-Förderleitung 7, an die eine tiefergelegene Abwasser-Förderpumpe 8 angeschlossen ist als auch eine Reinigungsmittel-Förderleitung 9, die über eine Rückstausicherung 10 und eine Reinigungsmittel-Förderpumpe 11 mit einem höhergelegenen kegelstumpfförmigen Vorratsbehälter 12 verbunden ist.In the section of the waste water discharge line 3 between the backflow safety device 5 and the backflow safety device 6 opens both a sewage delivery line 7, to which a lower-lying sewage pump 8 is connected and a detergent feed line 9, which is connected via a backflow safety device 10 and a detergent feed pump 11 with a higher frusto-conical reservoir 12.

In die Abwasser-Förderleitung 7 ist nahe der Mündung in die Abwasser-Ablaufleitung 3 eine weitere Rückstausicherung 13 eingebracht, die die Abwasser-Förderleitung 7 in Richtung der Abwasser-Förderpumpe 8 über einen nicht dargestellten Klappenmechanismus automatisch schließt. Die Gegenrichtung von der Abwasser-Förderpumpe 8 zur Abwasser-Ablaufleitung 3 ist offen, sobald die Abwasser-Förderpumpe 8 einen Förderdruck erzeugt.In the sewage discharge line 7 near the mouth in the waste water drain line 3, a further backflow 13 is introduced, which automatically closes the sewage conveyor line 7 in the direction of the sewage pump 8 via a flap mechanism, not shown. The opposite direction from the sewage pump 8 to the wastewater discharge line 3 is open as soon as the sewage pump 8 generates a delivery pressure.

Die Rückstausicherung 10, die in der Reinigungsmittel-Förderleitung 9 nahe der Mündung in der Abwasser-Ablaufleitung 3 angeordnet ist, schließt automatisch über einen nicht dargestellten Klappenmechanismus in Richtung der Reinigungsmittel-Förderpumpe 11 und des darüber angeordneten Vorratsbehälters 12, die Gegenrichtung ist offen.The backflow preventer 10, which is arranged in the detergent feed line 9 near the mouth in the waste water discharge line 3, automatically closes via a flap mechanism, not shown, in the direction of the detergent feed pump 11 and the storage container 12 arranged above it, the opposite direction being open.

In der Abwasser-Ablaufleitung 3 entsteht ein begrenztes Volumen einerseits durch die Rückstausicherung 5 und die Rückstausicherung 6 in horizontaler Richtung sowie andererseits durch die Rückstausicherung 10 und die Rückstausicherung 13 in vertikaler Richtung und bildet eine Rohrschleuse 14 aus. Die Rohrschleuse 14 ist mit einem elektrisch betätigten Entleerungsventil 15 ausgestattet. Das Entleerungsventil 15 verbindet im offenen Zustand die Abwasser-Ablaufleitung 3 mit dem Abwasserspeicher 2. Das Volumen der Rohrschleuse 14 ist kleiner als das Volumen des mit Reinigungsmittel 16 gefüllten Vorratsbehälters 12. Das Reinigungsmittel 16 ist aus einem festen und formlosen, vorzugsweise granuliertem Werkstoffgemisch ausgeführt, welches sich im Transportmedium auflöst. Dabei besitzt das Reinigungsmittel 16 eine vorzugsweise prismatische Form und eine Größe, die sowohl eine gute Verschachtelung untereinander als auch einen guten Kontakt zur Innenwandung der Abwasser-Ablaufleitung 3 ermöglicht. Die Größe des Reinigungsmittels 16 ist aber auch so zu bemessen, dass die Selbstauflösung möglichst gering ist. Das Reinigungsmittel 16 besteht hier aus granuliertem Eis, dem organische Bestandteile in Form von gehechseltem Stroh beigemengt sind. Es sind aber auch anorganische Beimengungen, zum Beispiel mit Flüssigreiniger möglich. Das Eis ist entweder aus Trinkwasser unterschiedlicher Reinheit oder auch aus dem Transportmedium, dem Abwasser selbst erzeugt. Alternativ zu granuliertem Eis kann jeder andere im Transportmedium auflösbare granulierte Werkstoff eingesetzt werden. Auch die Verwendung nicht auflösbaren Reinigungsmittels 16 in Granulatform oder ein Gemisch aus auflösbaren und nicht auflösbaren Bestandteilen ist möglich. Dabei ist jedoch nach Beendigung der Reinigung eine Einrichtung zur Trennung des Transport- und Reinigungsmittels vorzusehen.In the waste water discharge line 3 creates a limited volume on the one hand by the backwater protection 5 and 6 Rückstausicherung in the horizontal direction and on the other hand by the backflow protection 10 and the backflow protection 13 in the vertical direction and forms a pipe lock 14. The pipe lock 14 is equipped with an electrically operated drain valve 15. The drain valve 15 connects in the open state, the waste water discharge line 3 with the waste water storage 2. The volume of the pipe lock 14 is smaller than the volume of filled with detergent 16 reservoir 12. The detergent 16 is made of a solid and informal, preferably granulated material mixture, which dissolves in the transport medium. In this case, the cleaning agent 16 has a preferably prismatic shape and a size that allows both good interleaving with each other and good contact with the inner wall of the wastewater discharge line 3. The size of the cleaning agent 16 is also to be dimensioned so that the self-dissolution is as low as possible. The detergent 16 here consists of granulated ice, the organic components added in the form of straw alternated are. But there are also inorganic admixtures, for example with liquid cleaner possible. The ice is produced either from drinking water of different purity or also from the transport medium, the waste water itself. As an alternative to granulated ice, any other granulated material which can be dissolved in the transport medium can be used. Also, the use of non-dissolvable detergent 16 in granular form or a mixture of dissolvable and insoluble components is possible. However, a device for separating the transport and cleaning agent should be provided after completion of the cleaning.

Die Reinigung der Abwasser-Ablaufleitung 3 soll nun ausgehend von den Fig. 1, 2 und 3 anhand einer Funktionsbeschreibung erläutert werden.The cleaning of the waste water discharge line 3 will now be explained starting from FIGS. 1, 2 and 3 on the basis of a functional description.

Während des Normalbetriebes wird Abwasser in bestimmten zeitlichen Abständen aus dem Abwasserspeicher 2 von der Abwasser-Förderpumpe 8 über die Abwasser-Förderleitung 7 in die Abwasser-Ablaufleitung 3 gepumpt. Die Rückstausicherung 6 gibt dabei die Verbindung in das nicht näher dargestellte Abwassernetz frei. Es befindet sich also Abwasser sowohl im Abwasserspeicher 2 als auch in der Abwasser-Ablaufleitung 3. Zur Durchführung des Reinigungsbetriebes ist der Vorratsbehälter 12 mit Reinigungsmittel 16 gefüllt. Die Abwasser-Ablaufleitung 3 wird durch die Rückstausicherung 6 gesperrt. Das Entleerungsventil 15 öffnet und das in der Rohrschleuse 14 befindliche Abwasser entweicht vollständig in Richtung des Abwasserspeichers 2. Danach schliesst das Entleerungsventil 15 die Rohrschleuse 14 wieder und die Reinigungsmittel-Förderpumpe 11 fördert Reinigungsmittel 16 aus dem Vorratsbehälter 12 in die Rohrschleuse 14 solange, bis diese voll mit Reinigungsmittel 16 gefüllt ist. Dabei nimmt das Reinigungsmittel 16 in seiner Gesamtheit die vorgegebene Form der Rohrschleuse 14 an.During normal operation, wastewater is pumped at certain time intervals from the sewage tank 2 from the sewage pump 8 through the sewage conveyor line 7 into the sewage drain line 3. The backflow safety device 6 releases the connection into the sewage network not shown. Thus, there is wastewater both in the sewer 2 and in the wastewater discharge line 3. To carry out the cleaning operation of the reservoir 12 is filled with detergent 16. The wastewater discharge line 3 is blocked by the backflow 6. The drain valve 15 opens and located in the pipe lock 14 wastewater escapes completely in the direction of the wastewater storage 2. Thereafter, the drain valve 15 closes the pipe lock 14 again and the detergent feed pump 11 promotes detergent 16 from the reservoir 12 in the pipe lock 14 until this fully filled with detergent 16. The cleaning agent 16 in its entirety assumes the predetermined shape of the pipe lock 14.

Nun fördert die Abwasser-Förderpumpe 8 das im Abwasserspeicher 2 befindliche Abwasser in die Abwasser-Ablaufleitung 3 und drückt dabei das Reinigungsmittel 16 zusammen, bis ein enger Kontakt zwischen Reinigungsmittel 16 und Innenwandung der Abwasser-Ablaufleitung hergestellt ist. Die Rückstausicherung 6 öffnet, sobald der Gegendruck des in der Abwasser-Ablaufleitung 3 befindlichen Abwassers überwunden ist. Durch das weiterhin geförderte Abwasser wird das Reinigungsmittel 16 durch die Abwasser-Ablaufleitung 3 hindurch gedrückt. Die Aufrechterhaltung des Transportdrucks übernimmt, nach vollständiger Leerung des Abwasserspeichers 2, der Luftverdichter 4, der Abwasser und Reinigungsmittel 16 bis an das nicht dargestellte Ende der Abwasser-Ablaufleitung 3 befördert.Now, the sewage pump 8 conveys the wastewater located in the wastewater 2 wastewater discharge line 3 and presses the detergent 16 together until a close contact between detergent 16 and the inner wall of the waste water discharge line is made. The backflow preventer 6 opens as soon as the back pressure of the wastewater located in the wastewater discharge line 3 is overcome. Due to the still funded wastewater, the detergent 16 is pushed through the waste water drain line 3 therethrough. The maintenance of the transport pressure takes over, after complete emptying of the wastewater storage tank 2, the air compressor 4, the wastewater and cleaning agent 16 transported to the end of the wastewater discharge line 3, not shown.

Infolge des Transportdrucks wird das Reinigungsmittel 16 an die Innenwandung der Abwasser-Ablaufleitung 3 gedrückt, so dass bei gleichzeitiger Transportbewegung die Reinigung durch ein Schaben vieler Granulatteilchen des Reinigungsmittels 16 an der Innenwandung der Abwasser-Ablaufleitung 3 erfolgt. Dabei nimmt gemäß Fig. 3 unter Aufrechterhaltung des Reinigungsdrucks der Granulatteilchen des Reinigungsmittels 16 auf die Innenwandung der Abwasser-Ablaufleitung 3 die Menge des Reinigungsmittels 16 über das sich verringernde Volumen ständig durch Reinigungsverschleiß und Selbstauflösung ab. Das Volumen des Reinigungsmittels 16 zu Beginn der Reinigung ist so bemessen, dass trotz Reinigungsverschleiß und Selbstauflösung die Reinigung der Abwasser-Ablaufleitung 3 über die gesamte Länge auch bei unterschiedlichen Rohrdurchmessern erfolgt.As a result of the transport pressure, the cleaning agent 16 is pressed against the inner wall of the waste water discharge line 3, so that during simultaneous transport movement cleaning by scraping many granules of the cleaning agent 16 takes place on the inner wall of the waste water discharge line 3. 3, while maintaining the cleaning pressure of the granules of the detergent 16 on the inner wall of the waste water drain line 3, the amount of detergent 16 on the decreasing volume constantly by cleaning wear and self-dissolution. The volume of the cleaning agent 16 at the beginning of the cleaning is such that, despite cleaning wear and self-dissolution, the cleaning of the waste water discharge line 3 takes place over the entire length even with different pipe diameters.

Über den Luftverdichter 4 ist die Fließgeschwindigkeit und damit der Transportdruck veränderbar und es ergibt sich damit eine Veränderung der Reinigungswirkung. Eine Erhöhung des Transportdrucks wirkt sich dabei verstärkend auf die Reinigungswirkung des Reinigungsmittels 16 aus.About the air compressor 4, the flow rate and thus the transport pressure is variable and it thus results in a change in the cleaning effect. An increase in the transport pressure has a reinforcing effect on the cleaning action of the cleaning agent 16.

Liste der BezugszeichenList of reference numbers

11
Abwasser-ZulaufleitungSewage inlet pipe
22
Abwasserspeicherwater storage
33
Abwasser-AblaufleitungSewage drain pipe
44
Luftverdichterair compressor
55
Rückstausicherung (in der Abwasser-Ablaufleitung in Richtung Luftverdichter)Backflow protection (in the wastewater discharge pipe towards the air compressor)
66
Rückstausicherung (in der Abwasser-Ablaufleitung in Richtung Abwassernetz)Backflow protection (in the waste water discharge pipe in the direction of the sewage network)
77
Abwasser-FörderleitungEffluent output line
88th
Abwasser-FörderpumpeSewage pump
99
Reinigungsmittel-FörderleitungDetergent delivery line
1010
Rückstausicherung (in der Reinigungsmittel-Förderleitung)Backflow protection (in the detergent delivery line)
1111
Reinigungsmittel-FörderpumpeDetergent pump
1212
Vorratsbehälterreservoir
1313
Rückstausicherung (in Richtung der Abwasser-Förderleitung)Backflow protection (in the direction of the waste water supply line)
1414
Rohrschleusetube lock
1515
Entleerungsventildrain valve
1616
Reinigungsmittelcleaning supplies

Claims (6)

  1. Method of cleaning pipes, in particular waste water pipes, characterised in that a waste water drainage pipe (3) filled with waste water is locked, the locked pipe portion is drained and then filled with a solid and shapeless cleaning agent (16) and pressure is applied to the cleaning agent (16) so that the cleaning agent (16) is compressed to form a block which is both applied to the internal wall of the waste water drainage pipe (3) and transported through it.
  2. Method as claimed in claim 1,
    characterised in that the pressure applied to the cleaning agent (16) is selected so that the amount of material between the internal wall of the waste water drainage pipe (3) and the cleaning agent (16) is compensated.
  3. Method as claimed in claim 2,
    characterised in that the pressure applied to the cleaning agent (16) is drawn from the internal system pressure or from an external pressure generator.
  4. Method as claimed in claim 3,
    characterised in that a granulated material mixture is used as the cleaning agent (16).
  5. Method as claimed in claim 4,
    characterised in that the granulated cleaning agent (16) used comprises angular or rounded shaped bodies which can be completely or partially dissolved in the transport medium, of a size which ensures good nesting with one another and an intimate contact with the internal wall of the waste water drainage pipe (3) on the one hand and a low automatic dissolution with a high cleaning action at the same time on the other hand.
  6. Method as claimed in claim 5,
    characterised in that a mixture of granulated ice is used as the cleaning agent (16), with which an organic or inorganic constituent is admixed.
EP02023430A 2001-10-25 2002-10-19 Cleaning process for pipes. Expired - Lifetime EP1306140B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10152057 2001-10-25
DE10152057A DE10152057C1 (en) 2001-10-25 2001-10-25 Cleaning of pipelines, especially drains, comprises pressurizing a cleaning agent to form a block which lies against the inner wall of a drainpipe and is transported through the drainpipe

Publications (3)

Publication Number Publication Date
EP1306140A1 EP1306140A1 (en) 2003-05-02
EP1306140B1 true EP1306140B1 (en) 2006-09-13
EP1306140B8 EP1306140B8 (en) 2006-11-15

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ID=7703292

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Application Number Title Priority Date Filing Date
EP02023430A Expired - Lifetime EP1306140B8 (en) 2001-10-25 2002-10-19 Cleaning process for pipes.

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EP (1) EP1306140B8 (en)
AT (1) ATE339260T1 (en)
DE (2) DE10152057C1 (en)
DK (1) DK1306140T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013050086A1 (en) * 2011-10-07 2013-04-11 Ecolab Usa Inc. Method for applying a chemical compound to laundry articles using water ice as carrier
CN113454003A (en) * 2019-02-18 2021-09-28 热带产品公司 Method for minimizing material mixing during transitions in a material processing system
US11306859B2 (en) * 2019-09-17 2022-04-19 Tropicana Products, Inc. Interphase mixing inhibitors for minimizing material mixing in a material processing system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927324C3 (en) * 1979-07-06 1994-09-15 Schwing Gmbh F Pipe fitting with a housing that can be installed in lines that convey pressurized thick materials, preferably concrete, for changing a wiper
JPS58113589A (en) * 1981-12-28 1983-07-06 Niigata Eng Co Ltd Cleaning device for pump with reciprocating pipe
FR2544230B1 (en) * 1983-04-13 1986-06-13 Scemama Patrick SCRAPER FOR PIPES WITH A LIMITED LIFETIME
US4574830A (en) * 1984-03-07 1986-03-11 Exxon Production Research Co. Apparatus for pigging hydrocarbon product flowlines
JPS6438184A (en) * 1987-08-01 1989-02-08 Shizuo Sagawa Method of cleaning pipe
JPH0523650A (en) * 1991-07-23 1993-02-02 Showa Rubber Kk Cleaning body for steel pipe
JPH0557264A (en) * 1991-09-02 1993-03-09 Fuji Photo Film Co Ltd Method for cleaning pipeline and device therefor
DE19534804A1 (en) * 1995-09-20 1997-03-27 Claus Dipl Ing Hoffjann Pipe line cleaning method
JP3421012B2 (en) * 2000-12-26 2003-06-30 貞晋 大工 Pig for cleaning inside the pipe

Also Published As

Publication number Publication date
EP1306140B8 (en) 2006-11-15
DE50208122D1 (en) 2006-10-26
EP1306140A1 (en) 2003-05-02
DE10152057C1 (en) 2002-11-28
ATE339260T1 (en) 2006-10-15
DK1306140T3 (en) 2007-01-29

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