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US 5,840,130 AGranted
Cleaning of the water/steam circuit in a once-through forced-flow steam generator
AssigneeAsea Brown Boveri AG
InventorsErhard Liebig, Christoph Ruchti
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AssigneeAsea Brown Boveri AG
InventorsErhard Liebig, Christoph Ruchti
Estimating the term…
In a combined gas/steam power plant with a once-through forced-flow steam generator, a separation bottle (25) is connected between the evaporator (22) and the superheater (23). To clean the water/steam circuit, in the full-load or the part-load mode, a larger quantity of water than necessary is conveyed through the economizer (21) and the evaporator (22) via a feed pump (20). The quantity of water is selected such that wet steam passes into the separation bottle (25). This water fraction, together with all the impurities contained therein, is separated in the separation bottle and is drawn off via a clarifying line (29). Overfeeding can be regulated in such a way that the fresh steam temperature corresponds to the nominal value of the respective load point. When cleaning of the water/steam circuit is intended in the full-load mode, and without overfeeding the system, steam from a stage of incomplete evaporation can be extracted out of the evaporator and led into the separation bottle. During cold starting, the supercooled water passing via the evaporator (22) into the separation bottle (25) and, later, the water separated from the generated wet steam, are discarded via the clarifying line (29) until the desired purity in the water/steam circuit is reached.
A method for cleaning the water/steam circuit of a combined gas/steam power plant which has a gas turbine circuit and a steam turbine circuit, the waste gases from a gas turbine transmitting their residual heat to a steam turbine via the working medium flowing in a once-through forced-flow steam generator, said once-through forced-flow steam generator comprising an economizer an evaporator, and a superheater, and a separation bottle connected between said evaporator and said superheater, comprising the steps:
A method for cleaning the water/steam circuit of a combined gas/steam power plant which has a gas turbine circuit and a steam turbine circuit, the waste gases from a gas turbine transmitting their residual heat to a steam turbine via the working medium flowing in a once-through forced-flow steam generator, said once-through forced-flow steam generator comprising an economizer, an evaporator, and a superheater, and a separation bottle connected between said evaporator and said superheater, comprising the steps:
A method for cleaning the water/steam circuit of a combined gas/steam power plant which has a gas turbine circuit and a steam turbine circuit, the waste gases from a gas turbine transmitting their residual heat to a steam turbine via the working medium flowing in a once-through forced-flow steam generator, said once-through forced-flow steam generator comprising an economizer, an evaporator, and a superheater, and at least one separation bottle connected between said evaporator and said superheater comprising the steps:
A method for cleaning the water/steam circuit of a combined gas/steam power plant which has a gas turbine circuit and a steam turbine circuit, the waste gases from a gas turbine transmitting their residual heat to a steam turbine via the working medium flowing in a once-through forced-flow steam generator, said once-through forced-flow steam generator comprising an economizer, an evaporator, and a superheater, and a separation bottle connected between said evaporator and said superheater, comprising the steps:
Dependencies are inferred from the claim text.