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Show Additionally, the oxygen burner was expected to produce a kiln gas velocity only 1/ 3 of the previous minimum gas velocity, resulting in less particulate carryover from the kiln into the downstream equipment. During the 1985-h6 operation, samples of the material accumulated in thp SCC and from the quench water cleanup system (hydroclone~) were taken. Particle size analyses on these samples showed that the mean particle size of the SCC material ranged from 57 to 128 microns (depending upon the feed) whereas the mean particle size of the hydroclone material was 23 microns. Utilizing this information, the cyclone was designed to remove 90% of the total particles and 93% of particles larger than 20 microns. Most of the smaller particles entering the SCC were expected to be entrained in the flue gases and captured in the wet electrostatic precipitator. The goal of these modifications was to increase the MIS capacity by a factor of two and increase its on-stream factor to 80%, thereby increasing the overall throughput by more than a factor of three. The actual performance of the modified system will be discussed in the following sections of this paper. SYSTEM PERFORMANCE RESULTS After the system modifications were completed, the MIS operations were resumed on June 1, 1987. The burners were ignited on June 1 and the solids were first fed to the system on June 10, 1987. During the following 14 weeks of system operation, over a million pounds of dioxin-contaminated solids and liquids were incinerated. In addition, several tests were conducted in order to determine the performance limits of the system. A trial burn and associated tests were also conducted to attain the appropriate Resource Conservation and Recovery Act (RCRA) and Toxic Substances Control Act (TSCA) permits in preparation for potential future projects. The objectives of these tests included: Determine the soil feed rate limit of the modified system on clean soil. Verify by stack particulate data and analysis of kiln ash, cyclone ash, sludge and process water that the MIS as modified was still achieving adequate performance on dioxin-contaminated soils at the new feed rate. Determine the maximum amount of chlorine that can be fed to the system (in solid and liquid feeds together). Ascertain the feed rate limit density feed) and brominated preparation for future projects. on vermiculite (very low industrial sludge in |