electrical4u.com logo Home MCQ Engineering Calculators Videos Basic Electrical Circuit Theories Electrical Laws Materials Batteries Illumination Generation Transmission Distribution Switchgear Protection Measurement Control System Utilities Safety Transformer Motor Generator Electrical Drives Electronics Devices Power Electronics Digital Electronics Biomedical Instrumentation

Pulverized Fuel Firing of Boiler

Published on 24/2/2012 and last updated on 9/8/2018
The solid-fuel firing method is inefficient to take care properly the fluctuations of the load. There is a limitation in the combustion process. Solid-fuel firing method is not stable hence not suitable for large capacity thermal power plants. The flue gases contain a large quantity of ash, and for large capacity boiler, it is difficult to separate those ash particles from the exhaust gases during removal through the chimney. Hence, non-pulverized coal firing is not practical for a large boiler. After all, the main disadvantage of solid-fuel firing is that it does not burn the fuel entirely hence the thermal efficiency of the fuel reduces.
On the other hand, the pulverized fuel firing system is universally accepted method of boiler firing in the modern age, mainly because it increases the thermal efficiency of solid fuel to a great extent. In the pulverized fuel firing system, we make the coal in fine particles with the help of grinding mills. 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. We call this as “primary air.” The extra air required for completion of the combustion is supplied separately, and this additional needed air is secondary air. The thermal efficiency of the pulverized fuel firing system depends on the fineness of the crushed coal. Pulverized fuel firing system is suitable when coal for combustion not ideal for solid fuel firing.

Advantages of Pulverized Fuel Firing

Disadvantages of Pulverized Coal Firing

Related pages
Pulverized Fuel Firing of Boiler
Please Rate this Article
⚑ 0 total

New Articles
Articles on Combustion
Firing Steam BoilerCoal Combustion TheoryPrinciple of Solid Fuel Firing Pulverized Fuel FiringFluidized Bed CombustionSteam Boiler FunctionElectric Arc Furnace
More Articles on Generation
Generation of Electric PowerSteam Power StationPumpHydro Power StationNuclear Power StationDiesel Power StationGas Turbine Power StationTariff and EconomicsSolar Power GenerationWind power GenerationFire Protection of Power PlantBoilerSteam SystemElectrostatic PrecipitatorSteam CondenserDraught and ChimneyThermodynamics
Articles Categories
Basic Electrical
Electric Transformer
Electric Generator
Electric Motor
Electrical MCQ
Engineering Calculators
Video Lectures
Electrical Generation
Electric Transmission
Electric Protection
Electrical Measurement
Electronics Devices
Power Electronics
Digital Electronics