Gas Application Technologies (Commercial, Industrial
Use)
Development of a Supplemental Firing Burner for
Gas Turbines
Commercial & Industrial Market Development
Dept.
Commercial & Industrial Energy Business Unit
Commercial & Industrial Energy Business Unit
Outline
The supplemental firing burner is capable of achieving combustion using only the exhaust gas of a gas turbine. It can be installed directly on the wind box of a steam boiler. This burner allows construction of high-efficiency gas turbine cogeneration systems for factories that use large amounts of steam. High-efficiency repowering systems can be also constructed by converting steam boilers for steam turbines to waste heat boilers assisted by the supplemental firing burner.
Example of a repowering system using a supplemental
firing burner
Features of the Exhaust Recombustion Burner
- Uses the exhaust gas (O2 = 14 wet%, 500°C) of the gas turbine, in place of air, for combustion, thus improving the boiler's efficiency (98%).
- Can be installed on newly installed boilers and used to retrofit existing boilers.
- Allows lower residual oxygen density (3% or lower) in boiler exhaust gas than ordinary duct-burner-type supplementary burners (residual oxygen limit: 8%) for increased steam supply.
- Air blower enables independent boiler operation with the gas turbine in non-operation.
Future Topics
- Increasing the burner capacity (development of burner with 20 MW capacity for 100 ton/h boilers)
- Developing a co-firing burner that uses steel converter gas (heating value: 7.6 MJ/m3N).
- Developing a co-firing burner that uses waste oil.
