Adjustments during Stable Production Rate
The operator in the control room must make sure that:
• The levels of the pulp and filtrate tanks and the production rates in the different
parts of the process remain in balance.
• The pulp dilution and consistencies have been correctly adjusted to make the
presses function properly and that the desired outlet consistency is achieved.
• The results of the laboratory tests correspond with the setpoints and the
process measurements.
The most important analyses include:
• The amount of the pulp (flow and consistency) fed to the system so the
production rate is known.
The controlling and adjustment procedures of the pulp washing equipment are
predominantly carried out from the control room. There are, however, some regularly
repeated inspection rounds, during which contact with the control room can be made
by using two-way radios.
While making the inspection rounds through the plant, pay special attention to the
following:
• The sealing waters for the machines
• The local pressure gauges
• The pulp flow across the length of the press headbox must be even. This can
be checked via sight glasses on the side of the headboxes, looking for stagnant
pulp.
• The condition and running temperature of the bearings.
• The oil levels in the gearboxes and possible oil leaks.
• The tightness of pipelines and equipment.
• The tightness of V-belt drives