What are the characteristics of circulating fluidized bed boilers?

       With the rapid development of society and economy, circulating fluidized bed boiler equipment is used in many boiler manufacturers. The boiler equipment adopts a single drum and natural circulation mode. The surrounding is composed of membrane water-cooled walls, from top to bottom, there are primary air chamber, dense phase area, dilute phase area, especially the tail flue has high temperature superheater, low temperature superheater and economizer and air preheating device composition.So, what are the characteristics of circulating fluidized bed boilers?
       You will find that the characteristics of the circulating fluidized bed boiler are relatively obvious. The boiler adopts under-bed ignition (oil or gas) and staged combustion, and its combustion efficiency is relatively high. It is discharged by water-cooled screw slag extractor, ash cooler and dust hopper, which can ensure sufficient fuel. The turbulent bed is used, so that the fluidization speed is 3.5-4.5m/s, and the boiler combustion is relatively high.
       The combustion efficiency of the circulating fluidized bed boiler is higher than that of the bubbling fluidized bed boiler, usually in the range of 95-99%, and its gas-solid mixing is good; the combustion rate is high, followed by the recirculation combustion of fly ash, and its combustion intensity is high. , the furnace has a small cross-sectional area, which is its main feature. Its cross-sectional heat load is about 3.5-4.5MW/m2, which is close to or higher than that of the pulverized coal furnace. The circulating fluidized bed boiler is 2 to 3 times larger.
       What are the characteristics of circulating fluidized bed boilers, you should have a clear understanding of them?Generally speaking, the circulating fluidized bed boiler adopts the clean coal combustion technology with the highest degree of industrialization, and its boiler adopts fluidized combustion, which contains a combustion chamber (including dense phase area and dilute phase area) and circulating return furnace (including high temperature Gas-solid separator and return system) two parts, the boiler capacity is relatively large, 600MW or above.