Table of Contents
How does Afbc boiler work?
afbc boiler is suitable for combustion of low quality fuel . Inert fluidized bed is heated to the ignition temperature of fuel and fuel is supplied continuously into the bed. The fuel burn rapidly and the bed attain a uniform temperature. In afbc boiler combustion is take place at about 850- 950 degree Celsius.
How do I start a FBC boiler?
FBC ADVANTAGE OVER CHAIN GRATE STOKER BOILER
- Open the start up vent valve; ensure that minimum 20% MCR steam flow beacuse of maintain the flow through superheaters.
- Adjust the PA Air to wind box to start bed fluidization, ensure the air flow through windbox is above purge air flow requirement.
- Start the fuel feeders.
What is the disadvantage of FBC boiler?
However, they have some disadvantages such as erosion on the tubes inside the boiler, uneven temperature distribution caused by clogs on the air inlet of the bed, long starting times reaching up to 48 hours in some cases. FBC has a lower combustion temperature of 750 °C whereas an ordinary boiler operates at 850 °C.
What is difference between 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 DP test in Afbc boiler?
8-What do you mean by DP test in AFBC Boilers? It is the test carried out before the light up of Boiler to ensure the healthiness of air nozzle & bed plate.
How does a boiler work in a power plant?
The boiler generates steam at high pressure and high temperature. The steam turbine converts the heat energy of steam into mechanical energy. The generator then converts the mechanical energy into electric power.
What is PF boiler?
A pulverized coal-fired boiler is an industrial or utility boiler that generates thermal energy by burning pulverized coal (also known as powdered coal or coal dust since it is as fine as face powder in cosmetic makeup) that is blown into the firebox.
What is the main advantage of a fluidized bed boiler?
The main advantage of fluidized bed combustion system is that municipal waste, sewage plant sludge, biomass, agricultural waste and other high moisture fuels can be used for heat generation. A fluidized furnace has an enclosed space with a base having openings to admit air.
What are the advantages of FBC?
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 is the meaning of Afbc?
Acronym. Definition. AFBC. Atmospheric Fluidized-Bed Combustion (power generation, associated with coal-fired power plants)
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 differential pressure test in boiler?
Process for testing the impermeability of castings. In a differential pressure test (pressure testing), the casting is pressurized. After a short killing period, the casting is separated from the compressed air supply and the pressure difference is measured after a certain waiting period.
What can an AfBC boiler be used for?
AFBC boiler is a very developing technology now these days this technology is widely used in the industrial boiler for the purpose of efficient and clean burning of coal and other fuel for steam generation. afbc boiler is suitable for combustion of low quality fuel .
How is the residence time of a CFBC boiler determined?
Loop seal is the heart of the CFBC boiler. this is an arrangement which feed solids capture by cyclone to the furnace but prevents direct flow of gas from high furnace to the low- pressure cyclone . The residence time of the particle is determined by the collection efficiency of the particle separator and the solids circulation rate.
What kind of boiler is a circulating bed?
Because the whole bed is in continuous circulation internally, this type of boiler is called Internal Recirculation Circulating Fluidized Bed Combustion (IR-CFBC) boiler as described in Fig. 2. In circulating beds, more particles are blown from the bed than for a bubbling bed.
What kind of fuels can be fired in a fluidised bed boiler?
TBWES supplies fluidised bed boiler to fire fossil fuels like coal, lignite and wide variety of biomass ranging from rice husk to cotton stalk, and wood chips. Other industry waste fuels such as petcoke, char, dolo char are also fired in an eco-friendly manner with the lowest emissions and highest efficiency.