What are the advantages of a fluidized bed boiler?

The principal advantages of FBC systems include: (1) high fuel flexibility, including the capability of using fuels with a high content of sulfur or ash; (2) the capability for firing low-grade fuels, e.g., biomass, refuse-derived fuels, and wastes, and for co-firing different types of fuels; (3) in situ …

What are the advantages of using pulverized coal in boilers?

Advantages of Pulverized Fuel Firing By pulverizing the coal, the surface area for combustion increases much hence thermal efficiency increases. It results in faster combustion rate and consequently reduces the requirement of secondary air to complete combustion. The burden of the air intake fans also reduces.

What are the advantages of the fluidized bed combustion system over the fixed bed and the suspension firing systems?

Circulating fluidized-bed combustion technology has a number of advantages over BFBC technology including [19]: Improved combustion efficiency and sulfur retention due to the use of finer particles, turbulent gas-particle mixing, and a high recycle rate. Smaller bed area due to the use of high fluidizing velocities.

What are the disadvantages of fluidized bed combustion?

Disadvantages Of Fluidized Bed Combustion: It has to be maintained at a high value because there is a continuous requirement of high-pressure air for supporting the bed. 2) Due to the requirement of continuous high-pressure air, the cost of the auxiliary units of the plant increases.

How is circulating fluidized bed combustion different from pulverized coal?

Circulating Fluidized Bed combustion is a comparatively new technology that has given boiler and power plant operators a greater flexibility in burning a wide range of fuels. How is this different from the more widely used Pulverized Coal Combustion? Most of the coal fired power plants use the Pulverized Coal (PC) firing technology.

Which is better Cfb or circulating fluidized bed boiler?

PC firing utilises coal ground to a very fine powder sprayed into the furnace for combustion. CFB uses coal crushed to sizes of around 3 to 6 mm. The time energy and facility required to crush coal is much lesser than pulverizing coal. PC firing uses around 30 % of the combustion air as high pressure primary air for drying and transporting fuel.

What kind of coal is fired in a pulverized fuel boiler?

These pulverized fuel boilers fire coal in differing configurations including wall firing, corner firing and in some cases for low volatile fuels arch firing. The coal being fired in these boilers is 92 generally a high to medium quality bituminous coal which in many cases beneficiated through some type of washing.

What’s the difference between pulverized and subcritical coal?

Coal power technologies – SourceWatch The difference between subcritical, supercritical, and ultra-supercritical versions of pulverized coal combustion technology has to do with the steam pressure within the boiler.