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Show ",:.~ '. , ... " , Fluidized Bed Incinerator. Another fluidized bed incinerator - developed by Waste-Tech Services, Inc., cbas also been identified for the .- , f," : j' • SITE program. '!his systan has three CUlpJnents: a fluidized bed ccni:>us-tion charri>er, a secaodary ccubustion chani:>er, am a ~t scrubber. Solid . aDd liquid wastes are introduced into the prinary charri>er which operates .' """. . " at l400oP. Gases and su~med particles flC7.t1 into the secaodary chani:>er ''''\ ," .... :-, :': .. ..-;.. ~ ~·~;;j~.: where teuperatures are uaintained at 22000P for two secoms resideD:e "\:". ' .... : ....... ';~.-:'. time. In the ~t scrubber, particulates are reuoved and gases are neu- .. : . .:' '. . ' " tralized before they are exhausted to the atnosphere. Test burns have ~ :'. 'I" , ~ • • l' • f been carpleted at a pilot plant with feed rates of 10 to 30 lbs/lxmr. . mEs in excess of 99.99 percent have been achieved on carbon tetrachloride and chl0r0ethylene plant sludges. .. , ......... .j ', ", .. \f. ... .. .- =.. ' .' /' ... ~ ' :.~, ~ ''\.;~~\'. • • " ;~; .. J • ~ , • ~ ., '.' ~i t > .-:,·;.~~;>\~i"';';>~).~·:llf~~ ~.~I~~.'~;1\W't:~ Over .50 units are operational at different locations burning wastes .. ~.,;,~!:,.:~ .. ,'. ~~. :'.::: ." ~" . .' : .. ranging fran wood to radjoactive uaterials. The SITE darcnstration project : ;.1~://;S '. . ........ .. will utilize a m:bile unit at a ~~ site. . .<?~ .. '!:;:~~;;~ .. ( Electric Pyrolyzer. This system, proposed by Westingbouse Waste . ~. );. Technology Services Division, is designed for thenral destruction of organic . / .... haza.rdclls wastes without cari:nlstion. The system operates through rapid .. ~·t·.":~/~I ~fer of energy to the waste naterial causing dissociation of the organic .... :r~t~ m:>lecules into individual atans. The pyrolyzer is designed to operate ~I~:: '·~ ... ' . at teuperatures up to 3250oP. Gas resideIx:e tine can be controlled as . : ~:i ( .': necessazy to destroy organic uaterials. Exhaust gases are treated in a water~led cyclone, bagtxnlse filter, and venturi scrubber. It can process up to 40 tons per day. '"~ - , ... "\ ~ ., . In addition to destroying organics, the pyrolysis system also reduces metals to their elemental state and all inorganic oxides, sulfides, ani halides are fixed as liquid silicates. Solids fall into a nolten bath which when oooled forms a vitrified material with very lOtI leaching potential. - A prototype systan has been constructed which can process fran 5 to 20 tons per day of ~solid waste material with up to 10 percent organics and 25 percent water. The pyrolysis systan can be in the fonn of a rccbile unit, for exemple, a 100 ton per day unit could be. trailer rrounted ani ,:.:. 1. set up in a few days. Solidification and Stabilization. In this process developed by Hazcon, Inc., liquid wastes or sludges are mixed with a cementitious material (such as flyash or carent kiln dust) and a proprietary reagent. The mixture becanes hardened within 10 to 15 minutes and the hazardous constituents are microencapsulated with significantly reduced leaching potential. Hazcon states that the process is applicable to hydrocarbon waste fran refining operations, petrochanicals, residue fran oil-based paint, solvents and greases, as well as inorganic wastes contajning heavy netals. It can solidify wastes over a wide range of pH (wastes with pH fran .95 to 14 have been treated in benchscale tests) and there is IX> lllnit on rroisture content. The operation uses very sinple and standard blen:iing and mixing equiprent available fran machineIY suppliers. A nobile field blending unit is available wPich can be set up at a site in a few murs. The 5 |
