System and method to generate electricity
AssigneeGeneral Electric Company
InventorSamuel David Draper
Life of this patent
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Abstract
A split heat recovery steam generator (HRSG) arrangement including a first HRSG coupled to a turbine and thereby receptive of a portion of the exhaust gases to deliver the portion of the exhaust gases to a compressor, a second HRSG coupled to the turbine and thereby receptive of a remaining portion of the exhaust gases, which includes an NOx catalyst and a CO catalyst sequentially disposed therein to remove NOx and CO from the exhaust gases and an air injection apparatus to inject air into the second HRSG between the NOx catalyst and the CO catalyst to facilitate CO consumption at the CO catalyst.
Claims17
A split heat recovery steam generator (HRSG) arrangement to reduce emissions in exhaust gases emitted from a turbomachine system to generate electricity including a compressor, a combustor fluidly coupled to and disposed downstream from the compressor and a turbine fluidly coupled to and disposed downstream from the combustor to receive combustion gases and fluidly connected to the compressor to receive cooling and leakage fluid, the arrangement comprising:
- a first HRSG coupled to the turbine and thereby receptive of a portion of the exhaust gases to deliver the portion of the exhaust gases to the compressor;
- a second HRSG coupled to the turbine and thereby receptive of a remaining portion of the exhaust gases, which includes an NOx catalyst and a CO catalyst sequentially disposed therein to remove NOx and CO from the exhaust gases;
- and
- an air injection apparatus to inject air into the second HRSG between the NOx catalyst and the CO catalyst to facilitate CO consumption at the CO catalyst.
A system to generate electricity, comprising:
- a turbomachine, including a compressor, a combustor fluidly coupled to and disposed downstream from the compressor and a turbine fluidly coupled to and disposed downstream from the combustor to receive combustion gases and fluidly connected to the compressor to receive cooling and leakage fluid;
- a first heat recovery steam generator (HRSG), coupled to the turbine and thereby receptive of a portion of exhaust gases output from the turbine, the first HRSG being configured to deliver the portion of the exhaust gases to the compressor;
- a second HRSG, coupled to the turbine and thereby receptive of a remaining portion of the exhaust gases output from the turbine, which includes an NOx catalyst and a CO catalyst sequentially disposed therein to treat the received exhaust gases;
- and
- an air injection apparatus to inject air into the second HRSG between the NOx catalyst and the CO catalyst to facilitate CO consumption at the CO catalyst.
Dependencies are inferred from the claim text.