公开(公告)号：US3818872A

公开(公告)日：1974-06-25

申请号：US37521973

申请日：1973-06-29

申请人： COMBUSTION ENG

发明人： CLAYTON W ,  SCHUETZENDUEBEL W

IPC分类号： F22B29/06 ,  F22B29/12 ,  F22D1/02

CPC分类号： F22B29/12 ,  F22D1/02

摘要： An arrangement for protecting, at low loads, the furnace walls of a once-through steam generator system, having a recirculation loop, by increasing the mass flow of the working fluid flowing through the furnace wall tubes. A bypass for incoming feedwater is provided around the economizer allowing a lower temperature fluid to be delivered to and mixed with the fluid from the recirculation loop lowering the temperature of the fluid mixture. This results in a decrease in the specific volume of the mixed fluids; and since the recirculating pumps in the recirculation loop supply almost the same volumetric flow under all loads to the furnace wall tubes, the lower specific volume of the mixed fluid delivered to the pumps will yield a greater mass fluid flow to the furnace walls. The increased mass flow in turn results in improved heat transfer characteristics within the furnace walls thus reducing the likelihood of furnace wall damage due to overheating.

摘要翻译： 一种用于通过增加流过炉壁管的工作流体的质量流量，在低负载下保护具有再循环回路的直流蒸汽发生器系统的炉壁的装置。 在节能器周围设置用于进料给水的旁路，允许较低温度的流体被输送到来自再循环回路的流体并与流体混合物的温度混合。 这导致混合流体的比容的降低; 并且由于再循环回路中的再循环泵在所有负载下向炉壁管提供几乎相同的体积流量，所以输送到泵的混合流体的较低比体积将产生更大的流体流向炉壁。 增加的质量流量又导致炉壁内的传热特性得到改善，从而降低了由于过热导致的炉壁损坏的可能性。