Supplying heat to an externally fired power system
AssigneeExergy S.P.A.
InventorsAlexander I. Kalina, Mark D. Mirolli
Life of this patent
Estimating the term…
Abstract
Apparatus and method for supplying heat to an externally fired power system by using a multistage system having two or more combustion zones. Each combustion zone has an associated heat exchanger that conveys a respective working fluid stream from the externally fired power system. Each combustion zone receives a portion of the total amount of combustion fuel, and the amount of fuel and air supplied to each combustion zone is adjusted to control the temperature to a predetermined value.
Claims22
A method for supplying heat to an externally fired power system that includes the steps of:
- supplying a first stream of air and a first portion of total amount of combustion fuel to a first combustion zone,
- combusting said first portion of fuel in said first combustion zone to form a first flue gas stream,
- transferring heat from said first combustion zone to a first working fluid stream from said externally fired power system in first heat exchanger conduits located within said first combustion zone, an amount of fuel and air supplied to the first combustion zone being adjusted to control the first combustion zone temperature to a first predetermined value,
- supplying said first flue gas stream, a second stream of air, and a second portion of the total amount of combustion fuel to a second combustion zone,
- combusting said second portion of fuel in said second combustion zone to form a second flue gas stream, and
- transferring heat from said second combustion zone to a second working fluid stream from said externally fired power system in second heat exchanger conduits exposed located within said second combustion zone, said second working fluid stream being independent of said first working fluid stream, an amount of fuel and air supplied to the second combustion zone being adjusted to control the second combustion zone temperature to a second predetermined value.
Apparatus for supplying heat to an externally fired power system comprising:
- a first combustion zone connected to receive a first stream of air and a first portion of a total amount of combustion fuel and providing a first flue gas stream including products of combusting said first portion of fuel in said first combustion zone,
- first heat exchanger conduits located within said first combustion zone and conveying a first working fluid stream from said externally fired power system,
- control mechanisms for controlling an amount of fuel and air supplied to said first combustion zone to control the first combustion zone temperature to a first predetermined value,
- a second combustion zone connected to receive said first flue gas stream, a second stream of air, and a second portion of the total amount of combustion fuel and providing a second flue gas stream including the products of combusting said second portion of fuel in said second combustion zone,
- second heat exchanger conduits located within said second combustion zone and conveying a second working fluid stream from said externally fired power system, said second working fluid stream being independent of said first working fluid stream, and
- control mechanisms for controlling an amount of fuel and air supplied to said second combustion zone to control the second combustion zone temperature to a second predetermined value.
Dependencies are inferred from the claim text.