Process for continuously washing aqueous fibrous suspensions

Details Process for continuously washing aqueous fibrous suspensions Process for continuously washing aqueous fibrous suspensions

D - Textiles, Paper

21

C

92/60

D21C 9/02 (2006.01)

Patent

CA 1045435

PROCESS FOR CONTINUOUSLY WASHING AQUEOUS FIBROUS SUSPENSIONS ABSTRACT OF THE DISCLOSURE A process is provided for continuously washing fibrous suspensions in aqueous suspending liquors containing dissolved impurities to remove such impurities by exchanging aqueous suspending liquid substantially free from such impurities for the aqueous suspending liquor, which comprises washing fibrous material of the suspension in aqueous suspending liquid substantially free from dissolved impurities; and forming a washed fibrous suspension in such liquid; withdrawing aqueous suspending liquor containing dissolved impurities; diluting the washed fibrous suspension by adding aqueous suspending liquid substantially free from dissolved impurities; measuring the volume amount of such diluting aqueous suspending liquid added; measuring the volume amount of diluted washed fibrous suspension; and then adjusting the volume amount of wash liquid added to maintain sub- stantially constant the difference between the amount of wash liquid added and the liquid content of the undiluted washed fibrous suspension.

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