How to increase combustion efficiency by Unburned HydroCarbons automated control(PPT)

摘要

1. The presence of Hydrocarbons in the Gas Turbine exhausts is due of: 1.1 once released into the atmosphere, hydrocarbons react in the presence of NOx and sunlight to form ground-level ozone (O3), a major component of smog 1.2 hydrocarbons are wasted fuel, which causes a loss of efficiency of the Gas Turbine 2. From the point of view of the effectiveness of fuel burn on transient, Gas Turbine fuel gas control valves generally work in “open loop” and the control on the efficiency to burn “fresh” fuel usually is not implemented 3. Partial combustion of the fuel (wasted fuel) and combustion overcools (flame instability) UHC and CO rise and the Gas Turbine overall efficiency decreases 4. Conversely, if a discrete and controlled quantity of fuel is injected, namely, the right amount of fuel gas that can be burned is involved, a stable combustion is obtained in the combustion chamber and: 4.1 the load gradient (MW/min) increases in load transient, due the improved combustion process 4.2 there is not wasted fuel because only the amount of fuel that can be burned is injected 5. UHC and CO decrease and the Gas Turbine efficiency is optimized.