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Show 5-10-4 The liquid incinerator/afterburner is a large brick-lined shell sized to provide a combustion gas residence time of 2 seconds at a temperature exceeding 2200 DEG.F. Turbulence in the afterburner is of utmost importance to oxygen molecule-toxic molecule contact during the high temperature detoxification process. The afterburner design futher insures mixing by utilizing a gas stream design velocity of 18 ft./sec. which results in a Reynolds number of s49,000. The afterburner is mounted on a custom trailer with supporting mounts that allow for thermal expansion. Additional hazardous liquids up to 150GPH may be destroyed in the primary burner that completes the incinerator/afterburner assembly. The maximum thermal loading of the primary combustor is 22 xlu BTU/hr. Depending on the type of wastes, the liquids may also be burned in a high temperature environment that is maintained by oxygen enrichment up to 50%. The combustion gases approach the adiabatic flame temperature of the fuel. This burner has the capability to burn highly chlorinated material with low BTU value Approximately 9200 lbs./hr. of primary combustion products mix with 24920 lb./hr. of kiln off gas when 2000 lbs/hr. of shredded PCB capacitors are incinerated. The design of the system allows a range of combinations of kiln off gas, secondary waste and contaminated water to be destroyed. The variations are governed by the thermal inputs imposed by the various potential waste streams. A trailer mounted firetube boiler rated at 19.6 x 10 BTU./hr. is provided to recover heat in the off gas stream. In order to minimize HCL corrosion, metal temperatures are kept near 400 DEG.F. The fouling of boiler tubes is greatly reduced by maintaining an average gas velocity of =150 ft./sec, thereby the particulate is blown to the quench sump where they are removed. The waste heat boiler provides steam at 250 PSIG required for the system prime mover and for the salt solution concentrator. A boiler feed water treatment package is also included to assure minimal boiler fouling and subsequently less boiler maintenance. A deareator is provided for oxygen removal and feed water heating. Off gases at 600 DEG.F from the waste boiler are drawn through an Inconnel elbow where the hot gases are sprayed with quench recirculation water such that cooling to 185 DEG.F is accomplished by the time the gas reaches the exit of the quench elbow. A FRP sump box acts as a sump tank for quench recirculation pumps and provides additional residence time for the gases to cool. Off gases from the |
