8/6/2019 CFB Boiler Technology

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TECHNICALDIRECTORY

Industry - 1.8

Industry classification Energy Source

Open Manufacturing Circulating Fluidized Bed (CFB) Electricity

Technology Classification Boiler Technology Practical UseOperation 2003

CFB technology is an advanced method for utilizing coal and other solid fuels in an environmentally

Outline acceptable manner. The low combustion temperature allows SO2 capture via limestone injection

while minimizing NOx emissions. The technology is flexible enough to handle a wide range of coals

as well as petroleum coke and blends of coal and coke. It is also increase overall boiler efficiency

and reduces operating cost. CFB boilers have been installed in smaller, industrial-size plants but have

only recently been considerd for larger utility power plants.

The CFB process offers the means for efficiently burning a wide variety of fuels while maintaining low

Principle emissions. Fuel is fed to the lower furnace where it is burned in an upward flow of combustion air. Fuel,

& ash, and unburned fuel carried out of the furnace are collected by a separator and returned to the lower

Mechanism furnace. Limestone, which is used as a sulfur sorbent, is also fed to the lower furnace. Furnace

temperature is maintained in the range of 1500 to 1700 F by suitable heat absorbing surface.

Description

Structure

explanation,

shapes, and/or

System

diagram

Saving To improve the overall economics and environmental performance, a polishing scrubber wasincluded to minimize reagent consumption while firing petroleum coke containing up to 8.0% sulfur.

Economics

Equitment Cost

Remark CFB boilers have been installed in smaller, industrial-size plants but have only recently been

considered for larger utility power plants.

References Inquiry

U.S. DEPARTMENT OF ENERGY DOE

National Energy Technology Laboratory (NETL)

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