| 摘要 |
The contaminants in the material are volatilized in a drum having a burner. The volatilized contaminants are separated from material particulates in a separator and are preheated in a heat exchanger for flow into an afterburner. The afterburner burns the volatilized contaminants to provide a clean exhaust gas to the hot side of the heat exchanger, the clean exhaust gas being cooled in the heat exchanger and exhausted to a stack. To control the exhaust temperature of the afterburner to the heat exchanger, a bypass conduit from the afterburner flows exhaust gases through a water seal valve bypassing the heat exchanger. The level of water in the valve can be adjusted to modulate the flow of hot clean exhaust gases from the afterburner bypassing the heat exchanger, thereby to control the temperature at the inlet of the heat exchanger.
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