Startup system for power plants
OwnerJames H. Freehinventor
Life of this patent
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Abstract
A startup system for a steam-driven turbine type power plant is disclosed in which auxiliary steam from an external source is heat exchanged against a circulating fluid so as to supply heat to the main steam generator during startup. In one preferred embodiment, auxiliary steam is also used to heat an inert gas which is circulated through the main superheater or reheater of the power plant to heat the superheater or reheater during startup. In another preferred embodiment, steam from a main superheater, or reheater, is used to heat a fluid in an auxiliary generator, and the heated fluid in the auxiliary generator is circulated to supply additional heat to the main steam generator during startup.
Claims12
A startup system for a power plant, said power plant including a main steam generator, comprising:
- a source of auxiliary heat, an auxiliary generator for producing a hot fluid from said auxiliary heat, and
- passage means for passing said hot fluid from said auxiliary generator to said main steam generator during startup of said power plant.
A startup system for a power plant, said power plant including a superheater,
- said startup system including a source of inert gas,
- said startup system including heater means for heating said inert gas, and
- passage means for passing said heated inert gas to said superheater to heat said superheater during startup.
A startup system for a power plant, said power plant including a superheater and main steam generator, said main steam generator producing a hot fluid during startup of said power plant,
- said startup system including an auxiliary generator comprising a heat exchanger having a tube-side, a shell-side and a fluid in said shell-side,
- passage means for passing said hot fluid from said main steam generator to the tube-side of said heat exchanger during startup and thereby heating said fluid in the shell-side of said exchanger, and
- passage means for passing said heated fluid from the shell-side of said exchanger to said superheater during startup.
A startup system for a power plant, said power plant including a main steam generator and a main superheater connected to said main steam generator,
- said startup system including an auxiliary generator and an auxiliary superheater connected to said auxiliary generator,
- passage means for passing steam from said main superheater during startup to said auxiliary superheater to heat a fluid in said auxiliary superheater, and
- passage means for passing said heated fluid from said auxiliary superheater to said main steam generator to supply heat to said main steam generator during startup.
A startup system for a power plant, said power plant including a main steam generator, first and second turbines and a reheater connected between said turbines,
- said startup system including an auxiliary generator and an auxiliary superheater connected to said auxiliary generator,
- passage means for passing steam from said reheater during startup to said auxiliary superheater to heat a fluid in said auxiliary superheater, and
- passage means for passing said heated fluid from said auxiliary superheater to said main steam generator to supply heat to said main steam generator during startup.
Dependencies are inferred from the claim text.