Energy consumption and CO2 content in the flue gas of normal shaft kilns: Part 2: Influence of the limestone quality and the process parameters (original) (raw)

of the fuel in counterflow to the air. In all other types of kiln, and also in firing systems of the energy production industry, combustion of the fuel takes place in co-current flow with the air. In a co-current process, the beginning and the end of the flame are largely predetermined, but in a lime shaft kiln the length and the position of the combustion zone decisively depend on the air excess number and the lump size of the solid fuel. For this reason, the lime shaft kiln must always be operated with air excess numbers of around one, in order to guarantee an adequately long combustion time of the coke.

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