Dryer temperature control

1. Surface pyrometers are available to control steam pressure to the dryers.
2. More often, steam pressure is controlled, and care is taken to remove non-condensables that alter the temperature/pressure relationship.
— this usually means using a large enough condenser.
— on very large machines, this involves either a vent on the side opposite the steam input or bringing steam in one side and condensate out the other side.
3. Keep inside of dryers clean through use of filming amines.
4. Maintain a minimum and even film inside dryers by providing correct siphon choice, setting, and operation.