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Questions and Answers
What was the installed capacity of thermal power in India in 1947?
What was the installed capacity of thermal power in India in 1947?
Which fuel accounts for the highest percentage of the total capacity as of November 30, 2005?
Which fuel accounts for the highest percentage of the total capacity as of November 30, 2005?
Liquid fuels include natural gas.
Liquid fuels include natural gas.
False
What type of boiler allows steam to be generated at specified rates?
What type of boiler allows steam to be generated at specified rates?
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What are the main types of solid fuels utilized for firing systems?
What are the main types of solid fuels utilized for firing systems?
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Which of the following is a type of Fire Tube Boiler?
Which of the following is a type of Fire Tube Boiler?
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The fuel bed firing system is commonly used for firing _____ fuel.
The fuel bed firing system is commonly used for firing _____ fuel.
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What type of firing arrangement is used for oil?
What type of firing arrangement is used for oil?
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Match the following types of boilers with their characteristics:
Match the following types of boilers with their characteristics:
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Study Notes
Introduction
- Thermal power station growth from 1947 to 2008
- Power generation increased by about 142x
- The thermal power plant is a significant contributor to the Indian Energy Scenario
- Generation of power in India is dominated by coal, followed by hydro, and then renewable energy sources
- The installed power generation capacity is projected to increase by 2012 by approximately 80%
- Boilers are classified by their installation and their purpose
General Classification of Boilers
- There are two main classifications of boilers:
- Package & Field Erected
- Fire tube/Water tube
Boiler Classification by Purpose
- Power boiler: generate steam used to power turbines for electricity generation
- Utility boiler: to provide industrial process steam for industrial applications
Fire Tube Boilers
- Combustion gases pass through tubes submerged in water within the boiler
- Fire tubes are classified by:
- Type of back (dry or wet)
- Fuel source( coal or oil)
- Internal or external firing
- Tube type (through tube, return tube)
- Orientation (horizontal, vertical, inclined)
Sub-Classifications of Fire Tube Boilers
- Common designs include:
- Simple Vertical Boilers
- Two Pass Boilers
- Scotch Marine Boilers
- Locomotive Type Boilers
Water Tube Boilers
- Water is circulated through the tubes
- Water tube boilers are generally used in power stations and industrial processes
Classifications of Water Tube Boilers
- Classified by:
- Circulation: natural (using buoyancy), forced (using pumps), or assisted (using both natural and forced circulation)
- Number of drums: drumless (once-through), single drum, two drum (bi-drum), three drum (tri-drum), multi-drum
Boilers and Fuels: Solid Fuels
- Common solid fuel sources:
- Coal
- Bagasse
- Biofuels (straw, fire-wood)
- Coke breeze
- Petroleum Coke (pet coke)
- Washery rejects (middling)
- Municipal garbage/manure
Boilers and Fuels: Liquid Fuels
- Common Liquid Fuel Sources:
- Fuel Oil - L.D.O./H.F.O./L.S.H.S./H.S.D.
- Black Liquor (Pulp Industry Waste)
- Naphtha
Boilers and Fuels: Gaseous Fuels
- Common Gaseous Fuel Sources:
- Coke Oven Gas
- Blast Furnace Gas
- Corex Gas
- Biogas
- Natural Gas
Solid Fuel Firing Systems
-
Fuel Bed Firing:
- Chain Grate/Renfrew & Oldbury Stoker
- Traveling Grate Stoker (including Style 28X Stoker and Rotograte Spreader Stoker)
-
Suspension Firing:
- Fluidized Bed Firing (including Bubbling , Atmospheric, Circulating, and Pressurized Fluidizing Bed Firing)
- Pulverized Coal Firing
- Direct Firing (including Front Fired, Opposed Fired, Downshot Fired, Corner Fired)
- Indirect Firing (Bin System)
- Burners (Laminar, Turbulent, Low-NOx)
-
For Bagasse Firing:
- Horse Shoe Furnace
- Dumping Grate Furnace
- Rotograte Furnace
Liquid Fuel Firing Arrangement:
-
Oil Firing:
- Steam Atomized
- Air Atomized
- Pressure Atomized
-
Black Liquor:
- Black Liquor Guns Spraying on Furnace Walls
- Burning of Char at Furnace Hearth
Gaseous Fuel Firing Equipment
- Spud Burners are used for high C.V. Gases
- Scroll Type Burners are used for low C.V. Gases (such as Blast Furnace Gas)
Steam Boiler Functions
- Steam Generation: Generates steam at specified rate and specific parameters (temperature, pressure, degree of superheat, and enthalpy content)
- Steam Separation, Washing, and Drying: Ensures steam purity and moisture removal
- Combustion Control: Balances heat generation and absorption rates to optimize operation
- Minimizing Heat Losses: Reduces heat losses through ash and other incombustibles to maintain efficiency
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Description
This quiz explores the growth and significance of thermal power stations in India from 1947 to 2008. It covers the classification of boilers based on installation and purpose, as well as the types of fire tube boilers. Test your knowledge on these concepts and their impact on the energy sector.
