CFB Power Plant Boiler Advantage and Disadvantage

CFB power plant boiler for sale is becoming more and more popular and it has been widely applied in power plant to meet the demand of electricity. CFB power plant boiler in ZG Boiler takes advanced circulating fluidized bed combustion technology and it benefits power plant operators a greater flexibility in burning a wide range of fuels. What is the specific advantage and disadvantages of this technology? We will discuss the CFB power plant boiler advantages and disadvantages in this article.

CFB Power Plant Boiler Advantages

1. Fuel Flexibility

The most important advantage of the CFB is the flexibility of firing a wide range of coal from 9500 to 25000 kJ/kg. CFB’s can also burn a limitless number of other types of solid fuels, separately or mixed with coal. The limitations if any are only in the feeding and other mechanical equipment. The output capacity and steam parameters depend on the heating value of the fuel.
CFB boiler can use different types of solid fuels that include low quality coal, lignites, coal blends, bagasse in sugar plants, bark in pulp and paper mills, coal washery rejects in mines, petcoke and other bio mass products. Most of these fuels are seasonal, production or availability dependent. Mixing with coal or using coal when other fuels are not available gives an uninterrupted steam and energy supply.

2. NOx Reduction

The combustion temperature in the furnace in a CFB boiler is considerably less than PC boilers resulting in lower NOx emissions. There is no additional requirement of separate NOx capturing devices which reduces capital investment.

3. Sulphur Dioxide removal.

Firing high Sulphur coal requires the use of a Flue Gas Desulphurisation (FGD) plant to keep emissions within statutory limits. An FGD is a complicated plant that requires high capital investment and operational cost. In a CFB limestone addition in the furnace converts the SO2 to sulphates during the combustion and circulation which goes out with the ash. A CFB boiler costs less than a PC fired boiler with an FGD.

4. Maintenance

Eliminating the pulverizer and pulverized coal piping reduces maintenance, related outages and equipment redundancy. A part of this saving is offset by higher maintenance due to erosion in pressure parts and furnace area, and maintenance of the refractory.

5. Auxiliary Power

Eliminating the pulveriser reduces power but is offset by increased power for higher quantity of primary air. Auxiliary power reduction by eliminating the FGD is a definite gain.

CFB Power Plant Boiler Disadvantages

1. Capacities Limitation

CFB power plant boiler capacities with CFB technology are limited to 200 MW range. Higher capacities are in development. Higher steam pressures and temperatures increase the power plant cycle efficiency. CFB technology has yet to achieve the same level of parameters in the new large power plants.

2. Fuel Limitation

High sulpher contents in coal on the boilers tubes and other mechanical/pressure parts, will influence the CFB efficiency. Higher temperatures can lead to slagging. In a CFB Boiler, Once slagging occurs this will block the bed and the total system.

ZG Boiler is the CFB power plant boiler manufacturer in China with more than 70 years’ history, and our CFB power plant boiler have high efficiency and we can supply 10-280 ton CFB power plant boiler to meet different levels’ requirements from customers.
Contact our online service to know more information about CFB power plant boiler advantages and disadvantages.

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