D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
92/60
D21C 9/02 (2006.01)
Patent
CA 1044933
PROCESS FOR CONTROLLING THE SUPPLY OF LIQUID IN CONTINUOUSLY WASHING SUSPENSIONS ABSTRACT OF THE DISCLOSURE A process is provided for controlling the supply of aqueous suspending liquid in continuously washing fibrous suspensions in aqueous suspending liquors containing dissolved impurities, to remove such impurities by ex- changing aqueous suspending liquors 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; withdraw- ing aqueous suspending liquor containing dissolved impurities; diluting the washed fibrous suspension by adding aqueous suspending liquid substantially free from dissolved impurities; measuring the amount of dissolved impurities remaining with the fibrous suspension after the washing has been completed by determining (1) the volumetric flow rate of the washed suspension; (2) the liquid content of the washed suspension; and (3) the content of dissolved impurities in the suspending liquid; and then controlling the volume amount of wash liquid added according to the washing losses to maintain washing losses within a predetermined limiting range.
276388
Hillstrom Per A.r.
Norehall Lars G.
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