抄録
The oscillatory behavior of the concentration of slurry discharged from a slurry tank is analyzed here mathmatically, on the assumption that a slurry tank system is a linear system with time lag in the slurry concentration.
If the concentration of slurry discharged from a slurry tank lags behind the average slurry concentration in the tank, the following consequences will arise: (1) The concentration oscillation of slurry discharged from the tank becomes excessive when the time lag exceeds a certain critical value determined by the slurry tank characteristics. (2) If the velocity of feeding the pulp sheets to the tank oscillates, the lower components remain as steady oscillations of the slurry concentration, but the effects of the higher frequency components are negligible. A kind of resonance occurs to the intermediate frequency components when the time lag of a stable system is sufficiently large.
