Apparatus for testing and recording the freeness of pulp

Details Apparatus for testing and recording the freeness of pulp Apparatus for testing and recording the freeness of pulp

1981-09-09

1983-09-27

Kazenske, E. R.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

G01N 1500

Patent

active

044061595

ABSTRACT:
The apparatus comprises a constant level flow receptacle and an immersion type freeness tester having two chambers, namely a filtration chamber provided with a bottom screen portion, and a measurement chamber. A sensing element is placed inside the measurement chamber for determining the level of the liquid passed through the bottom screen portion, and connected to a circuit for measuring this level and for recording the freeness according to this level. The dimensions of the filtration chamber and those of the measurement chamber are so selected that, during the immersion of the freeness tester into the pulp, water is supplied into the filtration chamber at a constant pressure differential between the level of the upper edge of the filtration chamber and the level of the edge of the flow receptacle.

REFERENCES:
patent: 2346746 (1944-04-01), Green
patent: 2546654 (1951-03-01), Qveflander
patent: 3330151 (1967-07-01), Reinhall
patent: 4089210 (1978-05-01), Fedorovich et al.
Article "Special Instruments and Controllers for the Wood-Pulp and Paper Industry" by L. N. Preobrazhensky et al, Moscow, Lesnaya Promyshlennost (Forestry Industry) Publishers, 1972, pp. 107-109, with translation.

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