Disc atomizers

At A, on Figure 6, the water to the spinning disc atomizers was turned off for a period of 30 minutes. The workplace dust levels fell from approximately 1150pg/m to 460yg/m. During this same time the workplace humidity fell from 78% to 70%. 

Latex Drying. The stripped latex was dried in a pilot plant NICHOLS/NIRO spray drier using centrifugal disc atomization. Different disc speeds were obtained by changing the atomizer drive pulleys. The disc speeds could be varied between 10,GOO-24, 000 rev/min, (tip speeds 62-150 m/sec) and were measured with a tachometer. The dryer has a 1.22 m inside diameter and is heated by a gas-fired heater. For a given dryer inlet temperature the dryer outlet temperature is controlled by varying the feed rate to the atomizer, e.g. increasing the feed rate lowers the outlet temperature. The dried resin was collected in a cyclone. 

Vehicle-mounted (with cab) and rotary disc atomizers volume of surface contamination, 2mL/h inhalation exposure, 0.005 mL/h ... 

The mixer (Figure 399b) employs a continuously operating turbine. Powders are metered onto the center of the turbine where they are deagglomerated and accelerated. Liquid is introduced under the turbine disc, atomized to a fine mist in an annular slot, and intimately mixed with the powder in radial chambers rotating as extensions of the disc within a close-fitting cover. 

Cernik, A.A. and Sayers, M.H.P. (1971). Determination of lead in capillary blood using a paper punched disc atomic absorption technique. Brit. J. Industr. Med., 2S, 392-398. 

Lukas, M. and Giering, L. P., The Effects of Metal Particle Size in the Analysis for Wear Metals Using the Rotating Disc Atomic Emission Technique, International Symposium on Oil Analysis, Erding, Germany, July 1978. 

Masters (1991) noted that Equation 4.1 appears to be the most suitable one for the prediction of the mean droplet size generated by a rotating disc atomizer. 

L. Huang, K. Kumar, A.S. Mujumdar, A comparative study of a spray dryer with rotary disc atomizer and pressure nozzle using computational fluid dynamic simulations, Chemical Engineering and Processing, 45 (2006) 461-470. 

Scheme 9.2 Scheme of a spray dryer with cocurrent disc atomizer. 

Hastings, I.J. and R.D. MacDonald. 1984. High Burnup Performance of Annular UO2 Fuel with Inter-Pellet Graphite Discs, Atomic Energy of Canada Limited Report, AECL-8510, January. 

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