The Characteristics of Circulating Fluidized Bed Boilers

June 14, 2021

Circulating fluidized bed boilers have an important position in large industrial production processes. This type of industrial boiler has a wide range of fuel adaptability and high combustion efficiency, and the combustion efficiency of circulating fluidized bed boilers is higher than that of bubbling fluidized bed boilers, usually in the range of 95 to 99%, and its gas-solid mixture is good.

75 tons circulating fluidized bed boiler as a high-efficiency low-pollution clean combustion branch boiler, its fuel adaptability, high combustion efficiency, load regulation, high efficiency desulfurization and low NOx emissions, simple fuel pretreatment system, easy to achieve comprehensive utilization of ash and many other advantages, in the production of steam, heating, cogeneration, power station boilers are widely used.

SHX coal fired CFB boiler
SHX coal fired CFB boiler

Circulating Fluidized Bed Boiler Advantages

Most of CFB boilers adopt single pot, natural circulation method, moreover, there are two shafts in front and tail, from top to bottom, there are primary air chamber, dense phase area, dilute phase area in order, especially its tail flue is composed of high temperature superheater, low temperature superheater and coal saver and air preheater.

The combustion efficiency of this boiler is relatively high, with the fluidization speed at 3.5-4.5m/s. Its combustion efficiency is relatively high, and according to relevant studies, the NOX emission range of circulating fluidized bed boiler is 50-150ppm or 40-120mg/MJ, which shows that its nitrogen oxide (NOX) emission is low. In addition, the high combustion intensity of this boiler equipment, the relatively small cross-sectional area of the furnace chamber and the high heat load per unit cross-sectional area of the furnace chamber are another major advantage of circulating fluidized bed boilers.

The features of wide fuel adaptability, good load adjustment characteristics and high combustion efficiency make circulating fluidized bed boiler popular with many users. At the same time, the coal feeding point is small, which simplifies the coal feeding system and is more conducive to combustion, the whole fuel pre-treatment system is simple, and it is easy to realize the comprehensive utilization of ash, the whole load regulation range is wide, and its load regulation is fast, so it plays an important role in many factories and enterprises.

ZOZEN can produce CFB boilers with boiler capacities from 10 to 100 tons, including steam boilers and hot water boilers of the SHX and DHX series. We are a manufacturer of industrial boilers with more than 30 years of production and sales experience, and have ASME standard “S” and “U” license steel seal.


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