Process and apparatus for the recovery of water from the flue gas of a combined cycle power station
AssigneeAlstom (Switzerland) Ltd
InventorRolf Bachmann
Life of this patent
Estimating the term…
Abstract
In a process for the recovery of water, which arises from the combustion of a fuel (19), particularly natural gas, in a combined cycle power station (101) including a gas turbine plant (11), a waste heat boiler (33), and a steam turbine (25) arranged in a water/steam circuit with the waste heat boiler (33), and/or which is added in the form of water or steam (36), the water is condensed out from the flue gas (42) arising from the combustion of the fuel (19) and containing water in the form of water vapor after flowing through the waste heat boiler (33), and is separated in liquid form, in particular by expansion in a utilization turbine (20).
Claims19
A process for the recovery of water from a combined cycle power station having a gas turbine plant, a waste heat boiler, and a steam turbine, the gas turbine plant and the waste heat boiler arranged in a flue gas path, the steam turbine and the waste heat boiler arranged in a water/steam circuit, the method comprising the steps of:
- combusting fuel to generate flue gas, the flue gas including water in vapor form;
- condensing out water from the flue gas;
- separating water in liquid form the flue gas after passage through the waste heat boiler, wherein the step of condensing out water from the flue gas comprises expanding the flue gas to condense water out.
A combined cycle power station useful for removing water from flue gases, the combined cycle power station comprising:
- a gas turbine plant with a combustion chamber for the combustion of fuel, the gas turbine plant for producing hot flue gases;
- a waste heat boiler connected to the gas turbine plant along a flue gas path for the production of steam by the hot flue gases;
- a steam turbine arranged together with the waste heat boiler in a water/steam circuit;
- and
- condensation and separation means for the condensation of water vapor contained in the flue gas and for separation of the condensed water, the condensation and separation means following the waste heat boiler in the flue gas path and comprising means for the expansion of the flue gas.
Dependencies are inferred from the claim text.