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    • 1. 发明申请
    • Circulation system for sliding pressure steam generator
    • 滑动压力蒸汽发生器循环系统
    • US20070283906A1
    • 2007-12-13
    • US11448648
    • 2006-06-07
    • Melvin J. Albrecht
    • Melvin J. Albrecht
    • F22D7/00
    • F22B29/04F22B29/068F22B29/12
    • A steam generator circulation system is provided and includes a boiler feed pump for forcing water through an economizer, and through the waterwall tubes of an evaporator. A separator receives a mixture of steam and water and sends the steam to a steam utilization unit such as a superheater. A valve is provided below the separator. If the valve is open, the saturated water from the separator is mixed with feedwater and recirculated through the tubes of the evaporator. If the valve is closed, recirculation is terminated. At loads below the critical point, the valve below the separator system would be open and the boiler would operate like a natural circulation drum boiler. At loads above the critical point, the valve below the separator system would be closed resulting in a boiler that operates like a once-through boiler.
    • 提供蒸汽发生器循环系统,并且包括用于迫使水通过节能器的锅炉给水泵,并且通过蒸发器的水壁管。 分离器接收蒸汽和水的混合物,并将蒸汽发送到诸如过热器的蒸汽利用单元。 隔膜下方设有一个阀门。 如果阀门打开,来自分离器的饱和水与给水混合并通过蒸发器的管道再循环。 如果阀门关闭,则再循环结束。 在低于临界点的负载下,分离器系统下方的阀门将打开,锅炉将像自然循环鼓式锅炉一样运行。 在高于临界点的载荷下,分离器系统下面的阀将关闭,从而产生像直流式锅炉一样运行的锅炉。
    • 2. 发明授权
    • Economizer bypass for increased furnace wall protection
    • 经济型旁路用于增加炉膛保护
    • US3818872A
    • 1974-06-25
    • US37521973
    • 1973-06-29
    • COMBUSTION ENG
    • CLAYTON WSCHUETZENDUEBEL W
    • F22B29/06F22B29/12F22D1/02
    • F22B29/12F22D1/02
    • 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.
    • 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。
    • 7. 发明授权
    • Circulation system for sliding pressure steam generator
    • 滑动压力蒸汽发生器循环系统
    • US07587996B2
    • 2009-09-15
    • US11448648
    • 2006-06-07
    • Melvin J. Albrecht
    • Melvin J. Albrecht
    • F22D7/00
    • F22B29/04F22B29/068F22B29/12
    • A steam generator circulation system is provided and includes a boiler feed pump for forcing water through an economizer, and through the waterwall tubes of an evaporator. A separator receives a mixture of steam and water and sends the steam to a steam utilization unit such as a superheater. A valve is provided below the separator. If the valve is open, the saturated water from the separator is mixed with feedwater and recirculated through the tubes of the evaporator. If the valve is closed, recirculation is terminated. At loads below the critical point, the valve below the separator system would be open and the boiler would operate like a natural circulation drum boiler. At loads above the critical point, the valve below the separator system would be closed resulting in a boiler that operates like a once-through boiler.
    • 提供蒸汽发生器循环系统,并且包括用于迫使水通过节能器的锅炉给水泵,并且通过蒸发器的水壁管。 分离器接收蒸汽和水的混合物,并将蒸汽发送到诸如过热器的蒸汽利用单元。 隔膜下方设有一个阀门。 如果阀门打开,来自分离器的饱和水与给水混合并通过蒸发器的管道再循环。 如果阀门关闭,则再循环结束。 在低于临界点的负载下,分离器系统下方的阀门将打开,锅炉将像自然循环鼓式锅炉一样运行。 在高于临界点的载荷下,分离器系统下面的阀将关闭,从而产生像直流式锅炉一样运行的锅炉。