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Design of an incinerator for industrial waste. For many years rotary kilns have been used in combination with an afterburner chamber followed by a steam boiler at BASF to incinerate the waste of chemical plants. Six incineration lines are available at the moment. As the amount of waste is always increasing an additional incinerator was necessary on increasing the incineration capacity a new flue gas cleaning system would have to be installed, not only for the new incinerator but also for the flue gas of five of the existing furnaces. The cleaning system will be done in two lines, each of them consists of an electric precipitator and a multistage scrubber. In order to design the new incinerator line, not only many operating conditions and legal prerequisites but also constructional and combustion requirements had to be considered. While the design of the rotary kiln is based essentially on empirical coefficients, e. g. on the burning load related to the furnace volume, the design of the afterburner chamber was made by the help of a numerical computation model supported by experimental model investigations. A further focal point was optimizing the operation of the waste burner which gave a primary reduction of the NOx emission. |
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