What is a BFB boiler?

A bubbling fluidized bed (BFB) boiler is a boiler that can also handle fuels that are difficult to pulverize or less combustible. The fuel is introduced into a mixture of sand flowing at high temperatures, allowing the fuel to be efficiently combusted.

What is bed height in Afbc boiler?

Fill bed material into the furnace so that bed height should be about 250–300 mm above air nozzles or 280–300 above the distribution plate. The bed material below the air nozzles remains static all the time and should be counted as bed height.

What is full form of Afbc boiler?

1. Atmospheric classic Fluidised Bed Combustion System (AFBC) 2.

What is CFB boiler?

Circulating fluidized bed (CFB) boilers use all kinds of solid fuels, from biomass to refuse derived fuel (RDF), to produce reliable and efficient clean energy. Fuel flexibility is at the core of CFB technology, contributing to fossil fuel and CO 2 emissions reduction while using local alternative renewable fuels.

What is the temperature range in bubbling fluidized bed?

between 700 and 900 degree Celsius
What is the temperature range in a bubbling fluidized bed? Explanation: The temperature range in a bubbling fluidized bed gasifier is between 700 and 900 degree Celsius.

What is bubbling fluidization?

In Bubbling fluidized (also called Aggregative fluidized bed), the velocities of the fluid is high, thus forming of two separate phases – continuous phase (dense or emulsion phase) and a discontinuous phase (lean or bubble phase).

What is the difference between Afbc and CFBC boiler?

In brief, AFBC means Atmospheric Classic Fluidized Bed Combustion (AFBC); CFBC means Atmospheric Circulating Fluidized Bed Combustion (CFBC). Here let’s know their differences from these aspects: velocity, heat transfer surface, requirement on size of coal, combustion air supply, and so on.

What is ECR and MCR of boiler?

As per Boiler Burner concern ECR is electronic compound regulation and MCR is mechanical compound regulation…in ECR, burner air and fuel is controlled by electronically and in MCR by mechanical linkage.

What is slugging in fluidized beds?

The slug flow (or slugging) regime arises in gas-fluidized beds when bubbles grow sufficiently large that their shapes and rising velocities are mainly determined by the diameter of the column in which they are found.