Humidity control on Paper production
Because Paper production is a complex process it requires a modern paper mill with several sections. Roughly these sections correspond to the processes involved in making handmade paper. First of all the machine refines the pulp and mixes this with water and other additives into a pulp slurry. Furthermore the head-box of the paper machine also distributes the slurry onto a moving continuous screen. As a result of this screen the water will drain from the slurry leaving a felt on the screen. In the next phase a large number of heated rolls will press the felt and dry this felt into paper. Finally the just produced paper will be shipped to the end users in large rolls.
The drying phase of the paper production is a complex and energy consuming process.
Humidity control will assist to improve product quality and to reduce energy costs for indirectly heated paper dryers.
The Model 1735 with 1231-DF probe will measure the “wet” oxygen level of the process by an insitu zirconia oxygen probe. Ambient air will be the reference to calculate the percentage of water vapour in the dryer.
In addition to basic Paper machines there are more complex or directly fired dryers. In that case it will be helpful to connect a 4-20 mA signal from an existing CEMS system. This signal represents the oxygen level after combustion and is connected to the 1735 analyser to calculate the percentage water vapour in the dryer or process.
Recommended products on indirectly heated dryers :
Model 1735 transmitter with 1 or 2 pieces of 1231-DF probes