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    • 4. 发明公开
    • Control systems for boilers
    • RegferungsystemefürDampferzeuger。
    • EP0065408A2
    • 1982-11-24
    • EP82302398.1
    • 1982-05-11
    • THE BABCOCK & WILCOX COMPANY
    • Russell, Thomas D.Walker, Robert R.
    • F22B35/10F01K3/22
    • F22B35/105F01K3/22
    • A system for controlling the operation of once-through boilers utilises variable throttle pressure over a very wide load operating range. The system utilises a valving arrangement permitting a turbine valve (22) to be opened to a predetermined open position, typically 70 percent of its fully open position, as soon as possible during a system loading process. The turbine valve (22) is maintained in this predetermined open position while the flow of steam from the boiler is being varied by a control valve (40) and the output pressure of the boiler is varying accordingly. The turbine valve (22) is then allowed to open further from the predetermined open position when the system reaches full design pressure so as to vary the flow of steam from the boiler while the output pressure thereof is maintained substantially constant. In this manner, the boiler is operated at a variable output pressure over a very wide load operating range.
    • 用于控制直通式锅炉的操作的系统在非常宽的负载工作范围内使用可变的节气门压力。 该系统利用阀门装置,允许涡轮阀(22)在系统加载过程中尽可能快地打开到预定打开位置,通常为其完全打开位置的70%。 涡轮阀(22)保持在该预定打开位置,同时来自锅炉的蒸汽流由控制阀(40)改变,并且锅炉的输出压力相应地变化。 然后当系统达到设计压力时,涡轮阀(22)进一步从预定打开位置打开,以便在输出压力保持基本恒定的同时改变来自锅炉的蒸汽流。 以这种方式,锅炉在非常宽的负载工作范围内以可变输出压力运行。