Which type of firing technique is employed for pulverised coal? Explanation: The pulverised coal is burnt along the front side of the burner. It can be done in more three ways, i.e. side wall firing, U-flame firing and corner firing respectively. U-flame firing is not used so much as it produces a very long flame.
What is meant by pulverized coal?
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 pulverized fuel firing?
We refer the process of making the fuel powder as pulverization. … This pulverized coal gets sprayed in the combustion chamber with a blow of hot air. The air used to spray the coal into the combustion chamber must get dry before entering the chamber.
Why is pulverized coal used Mcq?
Why is pulverised coal used? … Increased calorific value of coal.
Which separator is used to separate the pulverized coal in pulverized fuel firing?
Which separator is used to separate the pulverized coal in pulverized fuel firing? Explanation: Cyclones are mostly used for removing industrial dust from air or process gases. They are the principal type of gas-solid separator.
What is electricity from coal called?
Steam coal, also known as thermal coal, is used in power stations to generate electricity. … The hot gases and heat energy produced converts water – in tubes lining the boiler – into steam. The high pressure steam is passed into a turbine containing thousands of propeller-like blades.
What is PCI coal used for?
Pulverised Coal Injection coal (PCI) – coal used for its heat value and injected directly into blast furnaces (without an intermediate coking phase) as a supplementary fuel, which reduces the amount of coke required and therefore costs. PCI coal can also be sold into the thermal coal market.
What fuel is PF made from?
Pulverised bituminous coal (pulverised-fuel) is burned at some electricity power stations, producing pulverised-fuel ash, about 20–25 per cent of which becomes fused together like clinker and is known as ‘furnace-bottom ash’ (section 16.7.
What is Pulverisation?
n a solid substance in the form of tiny loose particles; a solid that has been pulverized.
What is Pulverised fuel?
Pulverised fuel (PF) is coal, or sometimes hard pitch obtained from the distillation of coal tars, which has been ground into small particles. … The finely-ground fuel is burned at a nozzle or jet in a similar way to gas or liquid fuel.
Which coal has highest ash content?
Which coal will have highest ash content Mcq?
Explanation: Peat and lignite coals have low calorific value and high ash content.
What is the heating value of coal?
Heat Values of Various FuelsHeat valueNatural gas42-55 MJ/kgHard black coal (IEA definition)>23.9 MJ/kgHard black coal (Australia & Canada)c. 25 MJ/kgSub-bituminous coal (IEA definition)17.4-23.9 MJ/kgЕщё 16 строк
What is left after coal?
Coal ash is the powdery substance that remains after burning coal. … The sludge, which is created from solutions sprayed inside exhaust stacks to capture the harmful chemicals that cause acid rain, sulfur dioxide and nitrogen oxide, falls to the bottom.
How is coal pulverized in the ball mill?
1. How is coal pulverized in the ball mill? Explanation: The pulverization in ball mill takes place as a result of action between the balls and coal, as the cylinder they are put in is made to rotate. The cylinder is partly filled with various sized steel balls.
What is Stoker power plant?
Stoker, machine for feeding coal or other solid fuel into a furnace, usually supporting the fuel during combustion. …