锅炉在其中煤炭被烧毁环境of high concentration of bed material (mineral matter) derived from combustion of coal retained by using cyclone / Separators / other means. This bed material is fluidized by primary air (a part of combustion air).
The high concentration of bed material along with staged air supply ensures that bulk combustion temperatures do not exceed 950°C making it environment friendly (lesser production of NOx) means of utilizing coal.
In CFBC boiler, this ash (mineral matter) is separated using a cyclone or similar device and RECYCLED back and hence termed as CIRCULATING FLUIDIZED BED.
In a fluidised-bed combustor, combustion occurs when proven worldwide for allowing a wide range of fuelthe mixture of fuel and fuel ash particles / Bed material is suspended by using a continuous stream of primary combustion air to create turbulence in the bed. The gas cushion between the solids allows the particles to move freely, giving the bed a liquid-like (fluidised) characteristic.
With emission norms getting stringent every day, it is becoming a challenge to install and operate AFBC boilers due to high SOx and NOx emissions. Industry having requirement of smaller range boilers say less than 80 TPH are forced to install costly FGC technologies. This not only impact CAPEX but OPEX also.
CFBC, is a better alternative to AFBC or even Pulverised Combustion (PC).
CFBC boilers are验证全球，允许各种燃料qualities and sizes to be burnt.
Emissions of SOx and NOx are significantly reduced和out the addition of expensive flue gas emissions control systems. This is due to the fact that the combustion temperature in a CFBC boiler (800 – 900ºC) is significantly controlled as compared to AFBC and lower than in PC boiler (1300–1700ºC), which results in considerably reduced NOx formation.
Majority of the sulphur in the coal is captured by limestone that is injected into the furnace;可以实现约90％至95％的SO2减少。
较低的燃烧温度也limits ash fouling and corrosion of heat transfer surfacesallowing the CFBC to handle fuels that are difficult to burn in PC boiler.
Even though the combustion temperature of a CFBC boiler is low, the circulation of hot particles providesefficient heat transfer to the furnace wallsand allows a longer residence time for combustion and limestone reaction. This results in good combustion efficiencies
For small sizes specially for Process Steam requirement, no other option than Imported Boilershaving reliability and spare parts issues.
追求提供行业innovative, viable and cost-effective solution, Mago Thermal offers smaller and medium rangeCFBC boilers (as small as 35 TPH)和“赫斯特”。
With nominal incremental price over AFBC boilers, Mago Thermal CFBC boilers are best optionfor better efficiency and emission norms.Some of features including :