install flue-gas desulphurisation (FGD) – a state-of-the-
art technology used to remove oxides of sulphur, such
as sulphur dioxide, from exhaust flue gases in power
plants that burn coal or oil. This technology is fitted as
an atmospheric emission abatement technology, in line
with current international practice, to en-
sure compliance with air-quality standards,
especially since the power station is located
in a priority air shed area.
It goes without saying that the dimen-
sions on the site are correspondingly big:
Almost 60-ton heavy steel and concrete
elements have to be moved, and a total of
approximately 115,000 tons of steel will be
installed in the construction.
To aid construction, seven red Wolff
cranes owned by Mitsubishi Hitachi Power
Systems Africa (MHPSA) are currently in
Four Wolff 1250 B luffing cranes are at
the power plant site where they really earn
their place with their lifting capacity of up to 60 tons.
These cranes also feature the standard Wolff Fine
Positioning controls allowing for a centimetre accurate
positioning of loads. This is of major importance in the
cramped conditions on the construction site.
Despite having a tower height of 120 meters, the
Wolff 1250 B cranes with their 60 m long jibs are only
tied to the stair towers of the boiler plants once.
Andreas Kahl, Managing Director at Wolffkran
“Working together with MHPSA, our technical
support department developed special collar
frames for the stair towers to enable simple and
yet stable anchoring of the crane to the
. “The crane concept envisages that one of
the 1250 B cranes will be relocated to Unit 6 as
Luffing Crane On Top Of Boiler Plant
The four red giants are supported by three Wolff 355 B
luffing cranes with 50 m jibs, which were erected directly
on top of the 122 m high boiler plants. In this way, an
overall hook height of 186 meters was achieved with
the use of just one tower segment.
Contractors World International Vol 7 No 2