Process for measuring the state of charge of suspensions and for

Details Process for measuring the state of charge of suspensions and for Process for measuring the state of charge of suspensions and for

1980-04-01

1981-10-13

Smith, William F.

Paper making and fiber liberation

Processes and products

Utilizing electrical or wave energy

162198, 162183, 162263, D21F 1100

Patent

active

042946565

ABSTRACT:
When a suspension is exposed to a field of ultrasound, a voltage can be tapped from two electrodes whose distance apart is an odd multiple of half ultrasonic wavelengths, and this voltage can be used as a controlling factor for the addition of, preferably, retention and flocculating agents to the suspension. The process is particularly suitable for fibre suspensions for the purpose of monitoring the starting process in paper machines and for rapid operating control.

REFERENCES:
patent: 3576713 (1971-04-01), Fricke
Beck et al., Tappi, vol. 61, No. 9, pp. 63-65, 9/78.
Zana et al., "The Journal of Physical Chemistry", vol. 71, Nos. 3 & 11, 2-67, 10-67, pp. 521-536 and 3502-3516.
Halabisky, D. D., "Wet End Control for the Effective Use of Cationic Starch," 1977, Papermakers Conference, 4-77.
Kawamura et al., Journal of Amer. Water Works Assoc., 8-67, pp. 1003-1013.

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