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Situation: The
coal used in the NRG Flinders power station at Port
Augusta, South Australia needs to be milled into a
combustible state before burning for steam generation. No
less than twelve coal mills perform this function. It's an
environment of dust, heat and vibration which really puts
the UNIMETER XQL to the test, but it comes through
with flying colours! These banks of UNIMETER XQLs
replaced old ERO, analogue switches. Measurements on a
mill are made primarily through a number of thermocouples
directly connected to the UNIMETER XQLs. This
information is linearized and calibrated to provide the
correct sequence of switched outputs, which in turn
control the mill.
Benefits: The UNIMETER XQL installation
provides a diagnostic auto-starting feature on the mills,
moving through a sequence of starting steps. In this
manner, each mill can be started at the push of a button.
If the mill fails to start, critical factors are displayed
on the front panel of each UNIMETER XQL. This
reduces downtime as the problem can be easily identified.
It is possible for all monitoring, control and diagnosis
to occur remotely using the AS4000 adaptor (RS485 to
RS232) and UniSoft software, thus creating a safer
work environment.
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