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HOMECirculating Fluidized Bed
循環流化床鍋爐
Introduction
Coal is blown up by the strong wind from the air-blower and enter into the "fluidized state".

Coal and air are suffciently mixed up and burnt. A large amount of coal particies carried by the smoke enter into the separator. Heavier particies collected by the separator are sent into the main combustion chamber via the recycle device to "recycle" and bum again. Light smoke enters into other parts of boiler and continue the heating. Advanced combustion technology enables the thermal efficiency of this kind of boiler to be over 86%.

CFB is called "clean combustion technology" due to their outstanding performances in terms of efficiency, energy-conservation, low-pollution and low emission of carbon.

Alterate or replace current medium and small coal-fired boilers (furmaces) by adopting technologies such as CFB and coal powder combustion".
Main Structural Features
  • The boiler structure is of (single)double-cylinder transversal natural circulation.
  • The hearth outlet is equipped with high-temperature vortex separator, which runs smooth and has a high separating rate.
  • It adopts imported refractory steel to manufacture the vortex throat, which resists to high temperature and abrasion.
  • The recycle device is composed of two small U valve and uses them to recycle, which leads to the uniform distribution of the recycled material and avoids the local accumulation on the grid plate so as not to influence the fluidization quality.
  • U-shape material recycle device can automatically balance the intake flow and the recycle flow without manual adjustmentunder operation.
  • The water-cool wall pipes and funnel pipes attached to the under body of hearth are all equipped with abrasion resistant device to assure the life expectancy of the heated part.
  • There is no heated surface of buried pipes which lay inside the hearth, which avoids the abrasion problems of buried pipes.
  • The fluidized bed hearth and vortex separator adopt fluidized bed abrasion-resistant molding bricks and fluidized bed abrasion resistant casting material, to secure the long-term operation of boilers.