Particulate emissions
The emission of particulates from power station stacks has been
a focal point since the early 1980s. Significant reductions in the
quantity of particulates emitted have been achieved through the
use of technologies that enhance the efficiency of electrostatic
precipitators, such as sulphur trioxide flue gas conditioning, skew
flow technology and modern control systems, and through the
retrofitting of pulse jet fabric filters.
The actual particulate emissions based on a 12-month moving
index (12mmi) were 0,21kg/MWh sent out (2007: 0,20kg/MWh)
against a target of ≤0,21kg/MWh sent out. Although the target
set was achieved, there was no improvement when compared to
the previous year as a result of an overall deterioration in power
station plant performance, poorer coal quality and the running
of the power stations to their limits in attempts to avoid load
shedding. Poor coal quality has led to electrostatic precipitator
problems at Duvha; ash plant technical problems at Kendal and
failure of the SO3 plant at Matla.
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Click here for more details on particulate emissions. |
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