OCR Text |
Show The system further has the capability to inject water into the system to prevent undesired temperature increases in the kil n and / or afterburner by creating an additional heat sink when high caloric wastes are incinerated. The control diagram for the Pyretron Thermal Destruction System is shown in Figure 5. In addition to the CO and O2 ana.lyzers at the kiln exit which are used for system control, MM5 and M5 gas sampling trains and a second set of CO, CO 2 and O2 analyzers were used continuously to monitor the chemistry of the flue gases. The flows of auxiliary fue'] (propane), air and oxygen supplied t o each burner were prescribed by the computerized control system . The flows were prescribed either automatically based on the control algorithm or manually to maintain stable incineration at the maximum production rate. The computerized control system further provided the necessary safety interlocks, start-up and shut-down operating sequences as well as optimum kiln and afterburner initial preheating control. Tests were performed at the CRF on a listed hazardous waste characterized as K001. This waste is a sludge from wood preservation ponds having plychlorinated phenols as POHCs. Characterization of this waste is given in Table 3. Table 3 Characteristics of Waste K001 (Pentachlorophenol) Characteristics Solid material, % Organic liquid, % Water, % pH: Organic halogen, % Reactivity Ignitability Ash content Viscosity Specific gravity Heating value: Concentrations (PPM) Pentachlorophenol Phenol 2-Chlorophenol 2,4-Dimethylphenol 2,4-Dinitrophenol 2,4-Dichlorophenol 2,4,6-Trichlorophenol Description-Quantity 10 45 45 4.0 to 4.6 <5 Not reactive Easily burned Low (few percent) "Pumpable" 1.05 to 1.1 Less than 8000 BTU/lb, highly variable 0.034 to 200,000 0.45 to 10,000 0.12 to 40 0.3 to 3.4 0.024 165 2.5 |