Water & Wastewater Asia May/June 2019

Based on the Kaplan turbine design principle, which ANDRITZ has been installing successfully all over the world since 1926,
the technology for concrete volute pumps was adapted, and carefully considered concreting procedures were developed
that ensure rapid execution and exact results
in the summer of 2018 by the tropical storm
Son Tinh, which caused numerous floods.
A PUMPING SYSTEM TO PROTECT
THE FLOURISHING TEA BUSINESS
As a result, different strategies have been
developed in the past few decades to deal
with these climate challenges, along with
the dynamic economic growth in the water
sector. In addition to refurbishment and
expansion of existing irrigation systems,
these strategies also include building flood
protection systems. Among them is the
pumping system in the Thanh Thuy district
of PhuTho Province. PhuTho is situated in
the northeastern part of the country and is
considered one of its poorest regions. The
most important industry in the region is the
cultivation of tea, which produces around
100,000 tonnes per annum, of which 80,000
tonnes are exported.
In order to increase crop yield and this
productivity to improve not only the living
standards and the ecological environment,
but also to reduce poverty for farmers in the
affected areas, a new pumping station, Doan
Ha, is to be built. It will have the capacity to
reliably irrigate up to 672,000 square metres
of paddy land, creating an infrastructure
for the formation of a large sample field.
In addition to irrigation, the required two
pumps to be installed in the station will also
be able to drain up to 2,122,000 square
metres of agricultural land, if necessary.
After coming out best in the review process
for the tender, in terms of meeting the project
requirements and providing detailed proof
thereof, ANDRITZ was awarded the order to
supply two concrete volute pumps together
with the complete electromechanical
equipment for the pumping station Doan Ha
in a joint venture with a Vietnamese partner,
HAIDUONG PUMP MANUFACTURING.,JSC
(HAPUMA).
ANDRITZ: BY NO MEANS AN
UNKNOWN TECHNOLOGY GROUP
The international technology group ANDRITZ
is not a newcomer to Vietnam. In addition
to equipping numerous hydropower plants,
such as Chau Tang, Nam Na 1 or Song Lo 6,
ANDRITZ also supplied 10 vertical line
shaft pumps in 2018 for the largest flood
protection plant in Vietnam – Yen Nghia,
near Hanoi. The station and its pumps
were specially designed and built for flood
protection purposes. This means that the
pumps are only activated when needed to
pump away large amounts of water at low
head in the shortest possible time.
Vertical line shaft pumps could also be used
for the Doan Ha pumping system. However,
the general framework of this project makes
concrete volute pumps much more suitable.
This is due to the significant advantage
they provide in applications with high flow
rates and very low heads. As a result of the
special design between the inlet and outlet,
the pump is extremely compact, leading to
significantly lower construction costs for
the overall plant.
THREE DIFFERENT DESIGNS
ENSURE THE BEST PUMP SOLUTION
Based on the Kaplan turbine design
principle, which ANDRITZ has been installing
successfully all over the world since
1926, the technology for concrete volute
pumps was adapted. Carefully considered
concreting procedures were also developed
to ensure rapid execution and exact results.
Water & Wastewater Asia • May / June 2019