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    • 5. 发明授权
    • Low load operation of steam turbines
    • 蒸汽轮机的低负荷运行
    • US4870823A
    • 1989-10-03
    • US277831
    • 1988-11-30
    • George J. Silvestri, Jr.
    • George J. Silvestri, Jr.
    • F01K13/02F01K3/22F22G5/00F22G5/02F22G5/20
    • F01K3/22F22G5/02
    • In the operation of a turbine system composed of apparatus (6,12,14,16) for generating steam and a turbine first stage (4) having inlet nozzles connected to be supplied with steam from the steam generating apparatus (6,12,14,16), the steam generating apparatus (6,12,14,16) being composed of a cascade arrangement of a boiler (6) producing steam at a selected pressure which has an assigned lower limit value, a primary superheater section (12), one or more division valves (14) presenting a steam flow passage having a controllable cross-sectional area, and a secondary superheater section (16) connected between the division valves (14) and the inlet nozzles, a method for reducing the output of the system at low load levels comprising: reducing the cross-sectional area of the steam flow passage presented by the division valves (14); and increasing the rate at which heat is supplied to the steam in the secondary superheater section (16) by an amount coordinated with the reduction imparted to the cross-sectional area of the steam flow passage by the reducing step.
    • 在由用于产生蒸汽的设备(6,12,14,16)和涡轮机第一台(4)组成的涡轮机系统的操作中,所述涡轮机第一台(4)具有连接到所述蒸汽发生装置(6,12,14 ,16),所述蒸汽发生装置(6,12,14,16)由在具有指定下限值的选定压力下产生蒸汽的锅炉(6)的级联布置,初级过热器部分(12) ,一个或多个具有可控横截面积的蒸汽流动通道的分隔阀(14)和连接在分隔阀(14)和入口喷嘴之间的次级过热器部分(16),一种减小 所述低负载水平的系统包括:减小由所述分隔阀(14)提供的所述蒸汽流动通道的横截面积; 并且通过所述还原步骤将与次级过热器部分(16)中的蒸汽供应的热量相加的速度增加到与蒸汽流动通道的横截面面积相比的减少量。
    • 6. 发明授权
    • Steam generator
    • 蒸汽发生器
    • US4290390A
    • 1981-09-22
    • US104428
    • 1979-12-17
    • Heinz Juzi
    • Heinz Juzi
    • F22B35/00F01K3/22F22B35/10F22B37/62
    • F01K3/22
    • A water outlet pipe leading to a feed water tank is connected to a separator disposed downstream of an evaporator. A heat exchanger and a first control valve are disposed in the water outlet pipe, the valve being influenced by the level in the separator 20. In the heat exchanger heat is transmitted from the water flowing out of the separator to the feed water flowing to the heating surfaces of the vapor or steam generator. Between the heat exchanger and the first control valve, a bypass pipe branches from the water outlet pipe and contains a second control valve which is also influenced by the level in the separator. The bypass pipe leads into a condenser. A considerable proportion of the water leaving the separator is discharged via the bypass pipe to the condenser as a result of the pipe branching off upstream of the first control valve. Consequently, the flow cross-section of the first control valve and the cross-section of a safety blow-off means provided on the feed-water tank can be considerably reduced in size.
    • 通向给水箱的出水管连接到设置在蒸发器下游的隔板。 热交换器和第一控制阀设置在出水管中,该阀受分离器20中的水平的影响。在热交换器中,热量从流出分离器的水传输到流入 加热蒸气或蒸汽发生器的表面。 在热交换器和第一控制阀之间,旁通管从出水管分支并包含第二控制阀,其也受到分离器中的液位的影响。 旁路管通入冷凝器。 离开分离器的水的相当大的比例通过旁通管排出到冷凝器,因为管在第一控制阀的上游分支。 因此,第一控制阀的流动横截面和设置在给水箱上的安全排放装置的横截面尺寸可以大大减小。
    • 7. 发明授权
    • Decoupled cascade control system
    • 解耦级联控制系统
    • US4174618A
    • 1979-11-20
    • US892537
    • 1978-04-03
    • Theron W. Jenkins, Jr.Justus C. Barber
    • Theron W. Jenkins, Jr.Justus C. Barber
    • F01K3/22F01K13/02
    • F01K3/22
    • Control of the throttle pressure in a drum boiler-turbine system is accomplished by controlling the rate of fuel feed with a cascade control system. When fuel feed cannot be directly measured, but is computed from boiler output, the controllers in the system are decoupled to prevent their interaction. The primary control responds to throttle pressure deviation to produce a heat release demand signal which is compared to the calculated heat release. A signal produced by summing components of the heat release calculation, namely steam flow and rate of change of drum pressure, is used to cancel out any contribution to the input to the primary controller by changes in throttle pressure resulting from disturbances in the fuel feed, which disturbances will be corrected by the secondary or fuel feed controller.
    • 鼓式锅炉 - 涡轮机系统中的节流压力的控制通过使用级联控制系统控制燃料供给速率来实现。 当燃料供给不能直接测量,而是从锅炉输出计算时,系统中的控制器被去耦以防止它们的相互作用。 主要控制响应节气门压力偏差以产生与所计算的放热量相比的放热需求信号。 通过对放热计算的组成部分(即蒸汽流量和鼓压力的变化率)进行求和而产生的信号用于通过由燃料供给的干扰导致的节流压力的变化来消除对主控制器的输入的任何贡献, 这些干扰将由次级燃料供给控制器进行校正。
    • 8. 发明授权
    • Turbine start-up system
    • 涡轮启动系统
    • US3946566A
    • 1976-03-30
    • US533108
    • 1974-12-16
    • Frank William Hochmuth
    • Frank William Hochmuth
    • F22G5/14F01K3/18F01K3/22F22G5/16F01K13/02
    • F01K3/22F01K3/181
    • Method and apparatus are described that are operative to elevate the temperature of superheated vapor delivered to a turbine, especially during startup of a power plant. A bypass circuit containing a heat exchanger is interposed in the main steam generator evaporative flow circuit whereby regulated amounts of heat are extracted from the plant operating fluid thereby subcooling the same prior to its passage to the evaporator section of the unit. Reduced amounts of steam are thus produced in the evaporator section for a given amount of heat input to the unit and a concomitant increase realized in the temperature to which the steam passed to the superheater is heated.Economies as well as operational advantages are achieved by the production in the heat exchanger of low pressure steam that is usable in the plant to augment steam flow to the low pressure section of the turbine, for soot blowing purposes, and/or for other low pressure steam needs during startup and normal operation of the plant.
    • 描述了可操作地提高输送到涡轮机的过热蒸气的温度的方法和装置,特别是在发电厂启动期间。 包含热交换器的旁路回路置于主蒸汽发生器蒸发流回路中,由此从设备工作流体中提取调节量的热量,从而在其通过单元的蒸发器部分之前将其过冷却。 因此,在蒸发器部分产生一定量的蒸汽,对于给单位输入的给定量的热量,并且在加热到过热器的蒸汽的温度上实现了伴随的增加。
    • 9. 发明授权
    • Automatic vapor engine start-up
    • 自动蒸汽发动机启动
    • US3797249A
    • 1974-03-19
    • US3797249D
    • 1972-01-06
    • THERMO ELECTRON CORP
    • PEZARIS CTEGAN WTRAME P
    • F01D19/00F01K3/22F01K13/02F23N1/10
    • F01K13/02F01D19/00F01K3/22
    • An automatic start-up system for a Rankine cycle engine provides start-up from a single actuation; for example, the closing of a switch. The start-up system initiates operation of a vapor generator for vaporizing working fluid which is admitted to an expander to produce work and a pumping system which supplies working fluid in the liquid state to the vapor generator. When the vaporized working fluid from the vapor generator begins to operate the expander at a predetermined running speed, the startup system is deenergized to terminate start-up operation. The engine then continues in a running mode. The engine may have a valve between the vapor generator and the expander for controlling admission of vaporized working fluid to the expander. When such a valve is present, a control means responsive to an appropriate engine operating condition is provided for establishing the proper valve setting.
    • 兰金循环发动机的自动启动系统从单次启动提供启动; 例如,关闭开关。 启动系统启动蒸汽发生器的操作,用于蒸发进入膨胀器的工作流体以产生作业,以及将处于液态的工作流体供应到蒸汽发生器的泵送系统。 当来自蒸汽发生器的蒸发的工作流体以预定的运行速度开始运行膨胀器时,启动系统被断电以终止起动操作。 引擎然后继续运行模式。 发动机可以在蒸汽发生器和膨胀器之间具有阀门,用于控制蒸发的工作流体进入膨胀器。 当存在这样的阀时,提供响应于适当的发动机操作条件的控制装置来建立适当的阀设定。