The report gives results of a pilot-scale demonstration of flux-force/condensation (FF/C) scrubbing for fine particle control, carried out on a secondary metal recovery furnace. Results were consistent with those of preceding laboratory bench-scale and pilot-plant studies. The system was generally capable of 90-95% efficiency on particles with a mass median aerodynamic diameter of 0.7-0.8 micrometers A, achieved with a 68 cm W.C. gas-phase pressure drop. A conventional high energy scrubber without FF/C effects would require pressure drops of roughly 250 cm W.C. for 90% and 535 cm W.C. for 95% particle collection efficiency. FF/C effects are those which accompany the condensation of water vapor from the gas and are generally caused by contacting hot humid gas with colder liquid and/or by injecting steam into saturated gas. Mathematical models have been developed for predicting FF/C effects and for use in scrubber system design. Agreement between the model predictions and experimental results was good. The report gives FF/C system design details, experimental results, analysis of results, description of mathematical models, design of an optimized system, cost estimates, and recommendations for future research.

Contract no. 68-02-1869. Program element no. 1AB012. Dec. 1977. Includes bibliographical references.