Increase productivity and achieve higher process stability by injecting CO₂ into the wash water at the final stage of the washing cycle. Lower brownstock pH reduces fiber swelling and leads to a better pulp drainage improving washing efficiency. Lower pH levels also reduce sodium loss in the washing stage.
The black liquor and pulp must be separated after they exit the digester
so that the pulp can go on to the papermaking process.
This separation occurs on brown stock washers, where water is used to wash
the black liquor from the pulp.
In case the washed pulp goes to the bleaching process.
CO₂ also allows a reduction of the chlorinated agents used at the first stage, (CDO). Increase content of solids black liquor.
Minimise chemical losses at the black liquor.
Recovery system (NaOH); low chemical consumption (paper machine)
At Nippon Gases we are called "The Gas Professionals" for a reason, give us a call as we are always here to help with solutions.
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