Screen reciprocating

Other types of RPC have been proposed but are not in industrial use as of this writing. These include a reciprocated wire-mesh packing (188), a reciprocating screen-plate (205), and the multistage vibrating disk column (MVE)C) developed in Japan (189,206,207). These types of RPC may be useful for gas—hquid contact as well as Hquid-Hquid contact. 

Reciprocating Screens These screens have rnanv applications in chemical work. An eccentric under the screen supplies oscillation, ranging from gyi atoi-v [about 0,05-m (2-in) diameter] at the feed end to reciprocating motion at the discharge end, Freqiiencv is 8 to 10... 

Reciprocating screens operated with a shaking motion, a long stroke at low frequency (20-200 Hz). Used for conveying with size separation. 

Flat screens are vibrated or shaken or impacted with bouncing balls. Inclined screens vibrate at 600-7000 strokes/min and are used for down to 38 pm although capacity drops off sharply below 200 /im. Reciprocating screens operate in the range 30-1000 strokes/min and handle sizes down to 0.25 mm at the higher speeds. 

The renormalized reciprocal screening length for the nth harmonic is the combination of Debye screening length and structural screening length due to the charge periodicity ... 

Reciprocal screening length Larger-to-smaller particle size ratio Characteristic wavelength Stokes law correction factor Electrochemical potential of an ion Reference electrochemical potential of an ion Chemical potential of a particle Reference chemical potential of a particle Fluid kinematic viscosity Hydrodynamic pressure tensor Pressure between plates (disjoining pressure)... 

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