Accession Number : AD0712264

Title :   A LABORATORY APPARATUS FOR PULSED DRAINAGE,

Corporate Author : SVENSKA TRAFORSKNINGSINSTITUTET STOCKHOLM

Personal Author(s) : Persson,Torsten ; Osterberg,Lars

Report Date : 03 JUN 1969

Pagination or Media Count : 9

Abstract : An appartus for pulsed filtration was designed for studies of the de-watering process in paper making. A compressed air system was used to produce pressure pulses in a pulp suspension filtrating through a wire screen. The application of a pressure transducer, an integrator and a position transducer made it possible to measure associated values for the instantaneous and the mean drainage pressure and the basis weight of the fibre mat. A description is given of the design and instrumentation of the appratus, its mode of action and the dynamics of the system. A few experiments were carried out. The basis weight of the fibre mat was studied for different pulse forms and frequencies. The flow velocity through the wire was determined over individual pulses. The influence of the pulp drainage resistance and of different pulse characteristics was demonstrated. (Author)

Descriptors :   (*WOOD PULP, *FLUID FILTERS), WATER, PAPER INDUSTRY, DESIGN, FLUID FLOW, SWEDEN

Subject Categories : Industrial Chemistry and Chemical Processing
      Wood, Paper and Related Forestry Products
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE