Energy consumption of hot blast cupolas

During the design stage, considerable care has to be taken to minimise the total flow of the gases to be treated. The combustion air intake has to be kept to a strict minimum. This is the reason why a separate combustion unit is always installed in conjunction with a below charge-hole offtake. 

For economic reasons (see below) the post combustion chamber is only used on hot blast cupolas. 

Emission limit values and continuous monitoring of CO and emission limit values for organic compounds. 

The technique finds general application in HBCs around Europe. 

The gases are combusted by an injection of air into the upper part of the charge or at a position above the charge top level. The airflow is adjusted so that the off-gases ignite spontaneously, due to their CO content and temperature. The injection nozzles can be placed on one or two levels. The partitioning of the airflow over the various levels, the choice of diameter and the 

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Table 4.38 Energy consumption of hot blast cupolas Applicability...

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