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| cylinder drainage heating system process control |
The controlling |
Process controlling |
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The process of paper
production requires a contemporaneously controlling of multitude parameters
to guarantee the demands on quality and production output. These parameters
have to measure and control in real-time concurrent to the production process. Apart
from the typical paper machine parameters, like weight, humidity of the
paper and machine speed the measured quantity of the steam and condensate
system is entering to the process control system of the paper machine. For
an optimal output of the paper machine the process control system is
automatically interfering in the control loop of the paper machine and
keeps the process variables on the fixed control input to allow product
specific modulations.
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Web breakage |
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In case of web
breakage and the lowest steam consumption the process controlling system
will sustain the necessary different pressure for the cylinder draining
automatically. Emanating features to the condensation system ensures the
necessary pressure drop.
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Condensate preparation |
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The condensate is
collecting by pressure drop and pump stations and then leads to the boiler
house. Al condensate pumping stations should be equipped with two pumps
whereby one pump should be dimensioned for the maximal condensate mass. The
second pump is included as a stand-by-aggregate and guarantees a high
availability of the plant.
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Plant safety |
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In the event of
breakdown of the energy supply, wire damage or missing control signal al steam
valves will be shut and the condensate valves will be open. By increase of
the steam pressure in the system over the valid working pressure automatic
secure valves releases the system by blowing the steam into the atmosphere.
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© 2015 by DKuM GmbH • office@dkum.de