METHOD OF WHITENESS CONTROL FOR REMOVAL OF PRINTING INKS IN DECOLOURATION PLANTS AND DECOLOURATION PLANT WITH FLOATATION CHAMBER FOR REMOVAL OF PRINTING INKS

摘要

FIELD: technological processes.;SUBSTANCE: particles of printing inks in fibrous suspension in floatation chamber are taken away with the help of gas bubbles, at that carry-over is realised by removal of produced foam into tray for foam. Amount of removed foam is established by the following operations: measurement of inlet whiteness of delivered fibrous suspension, definition of control action as function of inlet whiteness and prescribed specified value for whiteness of removed fibrous suspension acceptance, definition of removed foam amount depending on control action.;EFFECT: invention makes it possible to realise automatic control of whiteness for removal of printing inks.;13 cl, 5 dwg