OCR Text |
Show The test site for this study was selected after a number of sites were surveyed. It was desirable to select a site that would be most representative of hazardous waste incinerators in the United States. Though it is impossible to be completely representative at anyone site, the incinerator chosen had many of the equipment components common to hazardous waste incinerators and burned a wi de vari ety of types of wastes. The i nci nerator consisted of a rotary kiln with liquid waste injection and drummed solid feed, secondary combustion chamber, quench, and particulate and HCl control devices. The wastes fed to the incinerator during the tests included sol ids and liquids as follows: 1. Sol ids: Substituted cellulose Polyethylene wax Chlorinated pyridine tar 2. Organic liquids: Isopar (2,2,4-trimethylpentane) Carbon tetrachloride 3. Aqueous liquids: Runoff from diked area Each type of solid waste was drummed separately and the drums were automat i ca lly wei ghed and fed through a ram feeder to the k i 1 n every 4 mi n. Drums of the different types of waste were fed alternately. A uniform supply of the liquid organic waste sufficient for about 100 hours of operation was accumulated in a tank and spiked with about 10 percent carbon tetrachloride before the test. Liquid organic waste was fed continuously to both the ki ln and secondary chamber, and the aqueous 1 i qu i d waste was fed on ly to the kiln. Natural gas was fired in both the kiln and secondary chamber as needed to maintain temperatures. Combustion parameters (temperature, air flows, etc.) and a 11 feed rates was contro 11 ed by computer from a centra 1 contro 1 room. Table 1 shows a summary of the stack gas S&A parameters and methods used in the study. EPA's mobile monitoring van assisted MRI with some of the measurements. The stack sampling included two Modified Method S (MMS) trains, a Volatile Organic Sampling Train (VOST), a midget impinger train for aldehydes, an ORSAT sampler, continuous gas analyzers and three gas chromatographs (GCs). One MM5 train was analyzed for particulates and anions and the other was analyzed for semivolatile organics by GC/MS. The VOST samples were analyzed for volatile organic constituents by GC/MS. The ORSAT sample was analyzed for oxygen and carbon dioxide. The continuous analyzers included oxygen, carbon monox ide, carbon d i ox ide, and tota 1 hydrocarbons. The grab sampling frequency for the GCs depended on the column being used and the actual run conditions. C1 to C3 hydrocarbons were detected and quantified 2 |