5200 m of Pipes Overhauled - New 2018 Sewer Shaft Pump KRSU Installed for the First Time
Oct 12, 2018
Tsurumi has developed a new pump solution for overhauling sewers and pipe systems that allows the pipes to continue operating whilst work is being carried out.
The drinking water and sewage association (TAZV) Oderaue in the industrial park next to the Oder-Spree canal operates an industrial sewage treatment plant. The biggest user of this system is a paper factory, which only produces brown paper from old paper.
The TAZV Oderaue operates a sewer line that is 5200 meters long and runs into the neighbouring River Oder.
The operator pumps around 3.3 million cubic metres of sewage through the GFK pipes every year. The sewage has a temperature of around 30 degrees when it enters the river. One particular problem is that lime enters the process water circuit from the old paper in the paper factory: the precipitations of calcium carbonate not only pollute parts of the industrial plant, but are also found in the sewage load.
The work was carried out on sections to avoid operational standstills. Two shafts were used for over-pumping on each section of 200 m. The KRSU was placed in the head shaft: it bridged the section of pipeline that was being cleaned by means of two DN100 pipes so that this area could be cleaned without obstruction. The project is scheduled to take 18 months.
Tsurumi has designed the KRSU to be streamlined so that it can bridge pipe sections. With its maximum diameter of 546 mm, it fits into most access shafts that are typically 625 mm wide in public areas. The manufacturer has positioned the discharge branch in the centre of this aggregate that is 'only' 1486 mm high with a dry weight of 417 kg; this low centre of gravity guarantees an upright, secure stance.
A special impeller with high blades allows clogging-free pumping with a free passage of up to 56 millimeter.
Thanks to its design, the durable casing made of GG20 grey iron and special components, such as a centrifugal oil distributor (Tsurumi development), the pump cannot run dry. This means that it can be operated safely when partially submerged or in snore mode, i.e. when little water is pumped.
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