NA-05 - Cleaning: Vehicles and Technology

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Overview of the cleaning process
Criteria for the selection of the cleaning method
High pressure cleaning

Pumps

Pumps – drive system

The pumps are arranged behind the driver's cab and are driven by the vehicle's engine through an independent transmission and v-belt.

Image:

Pumps drive system [Source: STEIN Ingenieure GmbH]

Source: STEIN Ingenieure GmbH

Image and rendering credits Prof. Dr. Ing. Stein & Partner GmbH, Germany.

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The high-pressure pump is used to generate the flow rate and pressure for the flushing water. The design of the key performance indicators of the pump is subject to the nominal size of the sewer and level of filling, type and quantity of the deposits, pressure loss, as well as the required pulling force and desired cleaning performance. Sewer cleaning pumps are available with a performance of up to 660 l/min and a maximum operating pressure between 90 and 250 bar. Flushing vehicles that are equipped with two pumps and can achieve a performance capacity of 800 l/min are also available.

This high output is particularly required when cleaning large sewer profiles with a high partial flow level, in order to speed up the sewage and transport the removed deposits. A further increase in efficiency can be achieved by using additional pumps in the sewer to reduce friction losses in the hose [Geib2002].

The pumps installed in the vehicles have to meet the following performance requirements listed in table "Performance parameters and standard values for high-pressure pumps subject to the nominal size of the sewer" [ATV/VKS] [Gütes03] [FI-Müller].

Geib2002

Geib, M.; Wielenberg, W.: Reinigung von Abwasserkanälen durch Hochdruckreinigung. Schriftenreihe aus dem Institut für Rohrleitungsbau an der Fachhochschule Oldenburg (iro), Band 11, 2. Auflage, Hrsg.: Prof. Dipl.-Ing. Joachim Lenz, Vulkan-Verlag, Essen (2002).

ATV/VKS

Arbeitsbericht der ATV/VKS-Arbeitsgruppe 3.11.1 im ATV/VKS-Fachausschuss 3.11 „Infrastrukturabfälle aus Abwasseranlagen und Straßenunterhaltung“: Feste Stoffe aus dem Kanalnetz und Sinkkästen. KA Korrespondenz Abwasser (43), H. 11, S. 2003-2007 (1996).

Gütes03

Güteschutz Kanalbau "Gütegemeinschaft Herstellung und Instandhaltung von Entwässerungskanälen und leitungen e.V.". (Hrsg.): Leitfaden für die Eigenüberwachung Gruppe G. Bad Honnef, Mai 2003.