How does a CFB boiler work?

A circulating fluidized bed (CFB) boiler features higher gas velocity (superficial flow velocity) in the furnace (combustor) compared with a bubbling fluidized bed (BFB) boiler. The boiler activates a mixture of particles and gas to improve combustion reaction.

What is CFB power plant?

The circulating fluidized bed (CFB) is a type of Fluidized bed combustion that utilizes a recirculating loop for even greater efficiency of combustion. while achieving lower emission of pollutants.

How does fluidized bed combustion work?

Fluidized-bed combustion (FBC) uses a mixture of particles suspended in an upward flowing airstream, which combine to exhibit fluid-like properties. Combustion takes place in the bed with very intense mixing of gases and solids, high heat transfer to the furnace, and a low combustion temperature.

What is CFBC boiler details?

The Circulating Fluidized Bed Combustion(CFBC) boiler is the most advanced steam generatortechnology. Among many distinguishable advantages of CFBC boilers, itachievesvery low NOx and Sox emission by capturing sulfur contents of the fuel during the burning process.

Why clinker is formed in boiler?

Clinkers form in coal-fired boilers when the fuel source used to power the boiler is inferior. Poor-quality coal contains more water and minerals. These compounds break down when heated to high temperatures, and the debris that results clings to the sides or floor of the boiler, where ash can cover it.

What is fluidized bed combustion boilers?

Fluidized-bed boilers are the most common type of boiler recommended for biomass fuel, which is burned within a hot bed of inert particles, typically sand. The fuel-particle mix is suspended by an upward flow of combustion air within the bed.

What is Afbc and CFBC boiler?

AFBC means atmospheric fluidized bed combustion, where the furnace pressure is atmospheric pressure. CFBC boiler stands for circulating fluidized bed combustion boiler, the furnace is pressurised and the furnace gas is recirculated to capture the unburnt carbon, to increase the thermal efficiency of the boiler.

What is pulverized coal 1 point?

Pulverized coal is made from coal as the coals are crushed between cylindrical rollers and then it is air heated at about 340∘C. After that the pulverized coal is directly blown into the burner as a fuel. Pulverized coal is mainly used because it is fine enough that its combustion rate is very high.

What is a CFB boiler?

Circulating fluidized bed (CFB) boilers from Mitsubishi Power are able to combust a wide range of fuels, including bituminous coal, brown coal, anthracite, petroleum coke, wood biomass, paper sludge, RPF (refuse paper & plastic fuel) and waste tires, and have high combustion efficiency.

What is a circulating fluidized bed boiler?

What is circulating fluidized bed technology (CFB)?

Circulating fluidized bed technology (CFB) also offers the flexibility of using both coal as well as biomass fuels. Air supply is from under the bed at high pressure. This lifts the bed material and the coal particles and keeps it in suspension. The coal combustion takes place in this suspended condition.

What is cfcfb technology?

CFB technology burns fuels without fire or burners in the furnace but through a process of fluidization mixes the fuel particles with limestone which captures the sulfur oxides that are formed and the low temperature reduces nitrogen oxide formation.