TUNNEL FURNACE LEVEL
I CONTROL SYSTEM
A control system for
a tunnel furnace must not only regulate the heating
of the slab, but it must also move the material from
the caster to the mill, hold the material until the
mill demands a slab, and feed a slab to the mill at
one speed while receiving another slab from the
caster at another speed.
Combustion Controls:
- Multi-zone temperature control
for uniform product heating.
- PID loop generated input
demand for tight regulation of
zone temperature.
- Variable lead/lag, cross
limited fuel/air ratio control
with temperature and pressure
compensation for optimized
combustion efficiency and
minimal scale production.
- PID control provide tight
regulation of combustion air
pressure, furnace pressure,
recuperator waste gas inlet
temperature, and combustion air
temperature.
- Over-temperature monitoring of
combustion zones and recuperators to
force furnace shutdown when
operating at unsafe temperatures.
Human Machine Interface:
- Menu driven displays provide
intuitive interface for monitoring and
adjusting both combustion and material
handling process variables.
- Real time and historical trends
available for trouble shooting and
monitoring the performance of all
control loops.
- PID loop tuning screens provided to
adjust loop parameters and monitor
performance.
- Historical data logging of critical
process variables.
- Complete multilevel alarm and
annunciation system.
High Performance Level II system interface
provides process information to higher level
systems and accepts control commands to
optimize system performance.
Hardware Architectures - Siemens, Allen
Bradley, Mitsubishi
"Providing
innovative solutions for your automation
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