Keeping Material Moving

04.10.2013

Tunnelling contractor, Gallagher’s, contacted Euroflo to supply a dredging pump system. This was for a major rail-tunnelling project in east London, the Connaught Crossing.

Keeping Material Moving

Euroflo Fluid Handling Ltd

Coffer-dams were positioned at the Royal Albert and Royal Victoria docks, some 50m apart. This left water between the two coffer-dams, which were pumped out to leave a residue of heavy silt and slurry, situated 15m below. The civil engineering works involved the accessing of tunnels through the base of the excavation in order to enlarge the existing tunnels. Initially they used standard diesel driven Hydraulic drainer pumps in an attempt to pump heavy silt and slurry from the bottom of the excavation; however these pumps were completely unsuitable for a dredging pump application and continuously blocked causing lengthy delays.

Euroflo proposed a temporary dredging pump system that would cope with the heavy slurry and supplied the entire packaged solution; including generators, control equipment, cabling, pumps and pipework. This was to move the heavy slurry with an SG of around 1.3 and with a material to water volume of around 30%. As part of the package Euroflo installed a Dragflow Dredging pump, along with a jetting ring attachment. Water was high pressure jetted by a Grindex Drainage pump to help break up the heavy material. This was accompanied by a smaller Toyo Dredging pump that could be more easily moved around for slurry Pump transfer to the main Dragflow dredging pump from around the dock floor.

The Dragflow Dredging pump was positioned at the deepest part of the excavation so that the material would gravitate towards the dredging pump with the use of excavators and Euroflo’s other smaller more mobile dredging pumps. The larger Dragflow dredging pump then discharged the material over the cofferdam 100m away.

Euroflo were then commissioned to automate the operation of the Dragflow heavy-duty slurry pump system to run as required unmanned. Once the slurry removal process was complete an 8” Grindex Maxi drainage pump was installed to manage the water levels for the remainder of the project.

The key to success in managing high specific gravity applications is to keep the material moving and critical to that is the right pump selection with low RPM motors. Euroflo recommend heavy duty hard iron pumps for dredging pumps applications

More articles on this topic

KSB Group Inaugurated New Foundry in Grovetown (USA)

28.10.2015 -

The pump and valve manufacturer is investing about 75 million US dollars in its US site in Grovetown, of which 40 million US dollars are going to the new foundry. Investments in the KSB subsidiary GIW Industries are to prime the site to meet the mining industry’s rising global demand for white cast iron pumps.

Read more

HI Offers a Slurry Pump Webinar

05.10.2015 -

During this series, attendees will explore slurry types and their effects on pump performance and examine pump assembly considerations, mechanical design features and testing. The series will also cover slurry pump wear and application regarding selection, operation, maintenance and materials of construction.

Read more

HI Announces 2014 Member of the Year

06.03.2015 -

The Hydraulic Institute named Aleks Roudnev, Manager of Research and Design – Applied Hydraulics, Weir Minerals North America as its 2014 Member of the Year. The award was conferred to Mr. Roudnev at the Hydraulic Institute’s 2015 annual meeting held recently in St. Petersburg, Florida.

Read more

Weir Minerals Floway Pumps Introduces the VTSP

02.03.2015 -

Weir Minerals Floway Pumps introduces the new Floway VTSP – vertical turbine slurry pump – addressing the industry demand for a longer lasting, abrasives solids handling vertical turbine pump. Following several years of design innovation, research and testing, the VTSP has been demonstrated to last four times longer in solids handling services when compared and tested with the Floway vertical turbine pump bearing assembly.

Read more
Directly to the product selection in

PumpSelector

LATEST NEWS

  • Advertisement
  • Events

    « September 2020 » loading...
    M T W T F S S
    31
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    1
    2
    3
    4
  • JOB MARKET