This article provides a brief overview of the heat exchange principle of the dry quenching sub economizer heat exchanger,analyzes the factors affecting the heat load of the heat exchanger and the boundary layer theory of heat transfer,and points out the ways and methods to improve the heat exchange efficiency of the heat exchanger.The most effective way in the process is to switch the auxiliary economizer to a bypass and perform online acid washing to remove the scale layer on the inner wall of the U-shaped pipe.The equipment approach is to improve the shape,length,wall thickness of the heat exchange coil and add external fins,and new high thermal conductivity heat exchange materials can also be used.Through above measures,the thermal efficiency of the heat exchanger can be improved,thereby reducing the amount of low-pressure steam used in the deaerator,enhancing the processing capacity of the dry quenching furnace,and achieving the effects of costs reduction,quality and efficiency improvement.
维普
万方数据