Ultra-Supercritical Circulating Fluidized Bed (CFB) Boilers
660 MWe for lignite B, higher for hard coal, for low-grade and difficult-to-burn fuels such as anthracite, lignite, petroleum coke, oil shale, discarded coal and biomass, GE offer circulating fluidized bed technologies with different arrangements suited to fuel . GE CFB technology has low inherent NOx emissions at 50-200 mg/Nm3 due to the following features:
- Ultra-supercritical 285 bar, 605°C/623°C (MS/RH)
- More than three points increased net plant efficiency relative to subcritical
- 6% reduction of CO2 footprint
- Inherent low NOx emission with our air staging
- Just-In-Time (JIT*) system for limestone drying and crushing available for direct limestone feeding.
- Low SO2 emission without backend treatment
- Designed for reliability:
- Our circulating fluidized bed boilers are made of materials that are well-tested for pressure parts and have many years of onsite experience
- Multiple fuel feeders and ash extraction ports
- Standardized modules that allow changing outputs, fuels, and steam temperatures
- Relatively low and uniform furnace temperatures of approximately 850°C to 900°C
- Air staging in the lower furnace through the introduction of primary air and secondary air at appropriate levels
- Uniformly distributed fuel and air due to intense mixing inside the bed of solids in the furnace
- Isothermal conditions in the circulating solid loop due to the positive impact of highly efficient cyclones
- In addition, low SO2 emissions with 95 to 98% sulfur removal.
- Injection of prepared and dried limestone in the furnace
- Potentially inherent capture by the fuel-bound calcium
- Dry scrubber NID achieving 98 % sulfur removal while reducing limestone consumption
- Just-In-Time (JIT) system for limestone drying and crushing available for direct limestone feeding
Learn how CFB Boilers are a part of GE's Smarter, Cleaner Steam Power initiative.