Radial separation zones

Schematic diagram of radial separation zones in the cross section of a centrifugal clarifier.

This separation zone is characterized by a flat air vortex prevailing in a cylindrical chamber with tangential inlet and central outlet (Fig. lc). In this vortex air rotates and flows radially towards the chamber centre. The radial air movement (radial sink flow type) serves as the particles separation track. 

When the solid particles enter near the cylindrical wall they can be dispersed radially inwards because of the intensive turbulent mixing in the feed sections. There is, however, very little information about the behaviour of the liquid in the cylindrical section this portion of the cyclone is usually treated as a preliminary separating zone and the main separations are thought to be performed in the conical section. 

Radial chromatography is not as versatile or convenient as normal linear TLC, for example, for comparison of samples with standards, elution of separated zones, and in situ quantification. More elaborate and precise instruments for radial and anticircular chromatography are described in Sections III I, J, K of this chapter. 

SL/RN Process. In the SL/RN process (Fig. 4), sized iron ore, coal, and dolomite are fed to the rotary kiln wherein the coal is gasified and the iron ore is reduced. The endothermic heat of reduction and the sensible energy that is required to heat the reactants is provided by combustion of volatiles and carbon monoxide leaving the bed with air introduced into the free space above the bed. The temperature profile in the kiln is controlled by radial air ports in the preheat zone and axial air ports in the reduction zone. Part of the coal is injected through the centerline of the kiln at the discharge end. The hot reduced iron and char is discharged into an indirect rotary dmm cooler. The cooled product is screened and magnetically separated to remove char and ash. 

Radial rubber dams that separate between the feed, wash stages, cake discharge and cloth wash, and cloth drying zones to prevent the mixing of filtrates. 

Analysis of Heat Transfer. In the vertical Bridgman-Stockbarger system shown in Figure la, the axial temperature gradient needed to induce solidification is created by separating hot and cold zones with a diabatic zone in which radial heat flow from the ampoule to the furnace is suppressed. Analyses of conductive heat transfer have focused on this geometry. 

The annular centrifugal contactor is designed so that each stage achieves the required mixing and subsequent separation. Besides the conditions specified above, at least five additional factors must be considered. First, to allow the dispersion to flow by gravity from the mixing zone into the rotor, stationary radial vanes under the rotor must dissipate the rotational velocity of the dispersion. Second, the rotor inlet (RI) must be small... 

Category 2 this comprises electroactive zones of micro size, which are separated by sufficiently large inert blocking material. This electrode as a whole behaves as a collection of isolated microelectrodes, each of which exhibits convergent diffusion (radial and axial). 

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