WATER-INJECTION EMISSIONS CONTROL FOR A GAS TURBINE

摘要

A system and method include a nozzle configured to inject water into a gas turbine at a specified water flow rate. An effluent stream of the gas turbine includes a gas turbine effluent stream including a first emission level. A secondary emissions control apparatus is in fluid communication with the gas turbine effluent stream. An output stream of the secondary emissions control apparatus can include a second emissions level below a specified emissions output threshold. The method and system can reduce the amount of water over time that is introduced into the gas turbine based on the threshold emissions reduction capability of the secondary emissions control apparatus.

主权项

1. A system for emissions control of a gas turbine, comprising:
a nozzle configured to inject water into a gas turbine at a first specified water flow rate; a gas turbine having an inlet water stream, an inlet fuel stream, and a gas turbine effluent stream, the gas turbine effluent stream including emissions at a first emission level; a secondary emissions control apparatus positioned downstream from the gas turbine, the second emission control apparatus having an secondary inlet stream including the gas turbine effluent stream and a secondary outlet stream, the secondary outlet stream having a second emissions level; and an emissions control unit, configured to:
monitor, or calculate by modeled values, the first emission level of the gas turbine effluent stream;determine, if the first emission level is greater than a predetermined emissions level; andincrease, in response to the first emission level being greater than the predetermined emissions level, the first specified water flow rate to a second specified water flow rate.