INTRODUCTION 1 2.0 THEORY DEVELOPMENT 2.1 Light Scattering Theory 2.2 Fluctuations and Time-Correlation Functions 2.3 Photon Correlation Spectroscopy 2.4 Optical Mixing Techniques 2.4.1 Heterodyne Correlation Function 2.4.2 Homodyne Correlation Function 3.0 EXPERIMENTAL APPROACH 3.1 Optical Component Arrangement 3.2 Data Analysis 3.3 Initial Experiment 3.4 Final Experiment 4.0 DISCUSSION AND CONCLUSION REFERENCES LIST OF FIGURES Figure Pa g e 3.1.1 Optical Table 35 3.1.2 Photomultiplier tube housing 3.1.3 Data acquisition system 3.3.1 Inverse correlation time versus Sin 9/2 for a non-flowing system 3.3.2 Initial experimental set up 3.3.3 A typical plot showing polydispersity 3.3.4 A typical plot showing multiple scattering 3.3.5 Y-intercept of the SI plot versus flow rate for 10 m.m. I.D. tube using initial set up 3.3.6 Y-intercept of the SI plot versus flow rate for 6 m.m. I.D. tube using initial set up Revised set up Y-intercept of the SI plot versus flow rate for particles of two different sizes x. and T" versus flow rate for particle of nominal diameters 0.234 p t and T" versus flow rate for particles of nominal diameter 0.091 u Slope of the SI plot versus flow rate squared for particles of two different sizes Slope of the SI plot versus flow rate squared for three converging lenses of different focal lengths 85 4.6 Beam profile 89 4.7 Y-intercept of the SI plot versus flow rate for highly perturbed flow 91 3. 3. 7

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A multlfaceted experimental and theoretical program directed toward the understanding of rotary kiln performance Is underway. University, Industry and government participation Is Involved. This paper, the first In a series, presents a general discussion of the overall programmatic goals, followed by a brief description of the sub-programs Including: in-situ measurements from an industrial-scale rotary kiln located at the Louisiana Division of Dow Chemical USA in Plaquemine, Louisiana; laboratory-scale desorption characterization and klln-slmulator studies; and incinerator modeling efforts. Water-cooled probes have been used to obtain gas samples from the kiln and the afterburner of an Industrial-scale facility. The samples were analyzed using GC and GC/MS techniques. We include In this communication a report on these preliminary measurements.The United States now generates more than 265 million metric tons of hazardous waste per year. Of this amount, approximately 63 million metric tons are treatable by thermal destruction. 1 Because incineration can, in most cases, literally destroy the organic waste constituents and provide a substantial reduction in waste volume where total destruction is not realized, and because it provides a means for energy and material recovery, it has emerged as a preferred method of treatment.Oppelt has reviewed the state-ofthe-art of incineration techniques. 1 Although most existing hazardous waste incinerators have generally been found to comply with recently imposed federal guidelines, and have for several decades operated with proven performance, there is considerable public skepticism about whether incineration is truly an environmentally benign waste-treatment strategy. An improved understanding of incinerator performance is a necessary prerequisite for more informed public comment on future site location. A better understanding of the chemical and physical phenomena that underlie the operation of existing and currently planned units is also needed for the development of a new generation of incinerators. We have, therefore, initiated a multifaceted experimental and theoretical program directed toward the development of a rudimentary understanding of and predictive capability for rotary kiln and afterburner incinerator performance, as influenced by basic design and operational parameters. Presently, these are related largely through empirical guidelines developed from operational experience. The program we have initiated involves university, industry, and government participation.A series of papers discussing individual components and aspects of this overall kiln study will be presented. This communication is the first of that series. In this paper, we present background information followed by a brief description of the overall program goals and objectives along with our general approach to the problem, including a description of defined subprogram objectives. We conclude this paper with a presentation of preliminary results obtained from one unique sub-program of the experimenta...

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