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  • Senkung der Aus-brandverluste und CO/Nox-Freiseetzung beim Betrieb von Feureungsanlagen und Innenschacht- winderhitzern mit multivalenter Beheizung


Investigations using furnace-models revealed that the NOx-concentration from hot blast stove burners could be reduced substantially both by targeted operating methods and by the use of converter gas as a fuel. Both procedures increased the concentration of CO but some level of compensation appears possible. Similar model-based studies considered the consequences of using mixed fuels in hot blast stove ovens. Incomplete combustion and high levels of CO were attributed to inadequate mixing and distribution of the different fuels. High levels of NO were attributed to the presence of, for example, HCN in blast-furnace gas. The overall findings indicated that optimization of combustion conditions should be concentrated on certain operating circumstances which included a) the installation of guide plates in the flow chambers, each of which required individual design, b) staged combustion and the use of converter gas to reduce NOx levels in the exhaust gases by up to 30%. Both procedures impose some degree of economic penalty, especially when integrated plant operations are involved.

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Authors: WICKER M, VDEh Betriebsforschungsinstitut (DE);BENDER W, VDEh Betriebsforschungsinstitut (DE);DOHL K W, VDEh Betriebsforschungsinstitut (DE);LANGNER K, Thyssen Stahl AG;JOKSCH M, Thyssen Stahl AG
Bibliographic Reference: EUR 18416 DE (1998) 111pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-4551-6
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