The document summarizes the key components and mechanisms of a coal-based thermal power plant. The plant works on the basic Rankine cycle where coal is burned to produce steam that drives a turbine connected to a generator, producing electricity. The main components are the boiler, steam turbine, condenser, pumps, heaters, and other ancillary equipment. Coal is burned in the boiler to heat water and produce high-pressure steam to spin the turbine, which drives the generator and produces electricity. After working the turbine, the steam is condensed in the condenser and recycled to the boiler to repeat the process.
The document expresses gratitude to various people who helped with a vocational training project at a thermal power plant. It thanks the officials who oversaw the project, the power plant staff who provided assistance, and the author's parents for their support in completing the project successfully.
A short presentation about the different components of a steam power plant. It first tells us what's a steam power plant and then explains how electricity is generated by them.
The document describes the key systems and processes involved in a typical coal-based power plant. It discusses the various stages from receiving coal, to grinding and feeding it into the boiler to produce steam, to generating electricity via turbines connected to generators, and finally returning water to a liquid state to repeat the process. The power plant relies on integrated systems to handle coal, water, combustion, electricity production, ash removal and emissions control to efficiently and reliably generate power.
Thermal power plants generate 75% of India's electricity and have an installed capacity of over 93,000 MW. They work by burning fuel to create steam that spins turbines connected to generators. The main components are the fuel handling unit, boiler, turbine, generator, and cooling system. Fuel is burned in the boiler to create high-pressure steam, which drives the turbine before being condensed into water and recirculated or discharged.
This document describes the key components and processes involved in a thermal power plant. Water is heated to produce steam, which spins turbines connected to generators to produce electricity. The main components are the boiler, turbines, condenser, cooling tower and auxiliary systems. Coal is pulverized and burned in the boiler to heat water and produce high pressure steam. The steam powers high, intermediate and low pressure turbines in succession to generate electricity before being condensed back into water in the condenser. The water is cooled in the cooling tower and recycled to the boiler to repeat the process.
This PPT contains introduction and types of thermal power plants, WORKING PRINCIPLE, LAYOUT AND WORKING OF NUCLEAR POWER PLANT, WORKING PRINCIPLE OF COAL BASED POWER PLANT, SITE SELECTION OF THERMAL POWER PLANT,GENERAL LAYOUT AND WORKING OF COAL BASED THERMAL POWER PLANT, PRESENT STATUS OF COAL-FIRED THERMAL POWER PLANT, WASTE GENERATED IN THERMAL POWER PLANTS AND MANAGEMENT , TREATMENT AND DISPOSAL OF WASTE GENERATED IN THERMAL POWER PLANTS.
Coal Fired Power Plant
-Types of coal
-Traditional coal-burning power
plant
-Emission control for traditional
coal burning plant
-Advanced coal-burning power
plant
-Environmental effects of coal
KTPS-V Station in Andhra Pradesh was commissioned in 1996 as the first major thermal power station in the state. It uses a steam turbine generator system where coal is burned to produce steam that spins the turbine to generate electricity. The station has four main circuits: steam and water, air and gas, coal and ash, and cooling water. Steam is produced in a boiler and drives high, intermediate, and low pressure turbines connected to an electrical generator before condensing in a condenser.
The book describes the basics of heat rate, how it is to be calculated, the mass balance of the Thermal power station and the requisite data to be collected, the boiler efficiency, turbine efficiency and everything related to the heat rate of the Power Plant.
This document provides a summary of a seminar presentation about the main parts of a thermal power plant. The summary includes:
- An overview of the key components of a thermal power plant, including the coal handling plant, boiler, turbine generator, transformers, and switchyard.
- Descriptions of the main functions of the boiler, including converting coal energy into steam and heating feedwater and steam.
- Explanations of other important systems like the cooling tower, ash handling plant, water treatment plant, and their roles in the power generation process.
This document is a summer training project report submitted by Emam Raza, a student of mechanical engineering at KIET School of Engineering & Technology. The report details Raza's training at the NTPC Dadri power plant. It includes declarations by Raza, acknowledgements of those who assisted him, and sections on India's power sector, the National Thermal Power Corporation, and details about the NTPC Dadri plant such as its location, capacity, layout, and descriptions of the coal handling plant and mill sub-systems.
Thermal power plants generate electricity by burning coal to produce steam that drives turbines connected to generators. They are a major source of electricity in many countries. In India, thermal power plants make up 75% of electricity generation. Coal is pulverized and burned in a boiler to heat water into steam. The high-pressure steam spins turbines that power generators to produce electricity. The steam is then condensed in a condenser using cooling water from cooling towers before being returned to the boiler as feedwater to repeat the process. While thermal plants provide reliable base-load power, they also produce significant air pollution and carbon emissions.
introduction to thermal powerplant,type of thermal powerplant,captive powerplant,rankin cycle,co-generation powerplant,subcritical powerplant,supercritical powerplant,theory of operation,working principle,parts of powerplant,boiler,turbine,etc
Thermal power plants generate electricity through the combustion of fuel to produce steam that drives a steam turbine which spins an electrical generator. The document discusses several key components and considerations for thermal power plants, including their need for large quantities of fuel (typically coal), water, and land for ash storage. It also outlines the basic energy conversion process from fuel to electricity and highlights some common components like boilers, turbines, condensers, and coal and ash handling systems. Locating thermal plants requires consideration of factors like fuel availability, water sources, and ash disposal.
This deals with Boiler feed pumps used in power plants .
contains details about the KHI and FK series pumps , technical parameters and maintenance prctices followed for these pumps
This document discusses coal-based thermal power plants. It describes the basic cycles used in thermal power generation like the Rankine cycle. It then discusses the major components of a typical coal fired thermal power station like the coal handling plant, ash handling system, boiler, turbine and condenser. The coal handling plant prepares and feeds coal to the boiler. In the boiler, coal is burnt and water is converted to high pressure steam. This steam powers the turbine, which drives the generator to produce electricity. The exhaust steam from the turbine is condensed back to water in the condenser to complete the cycle.
This document provides an overview of a thermal power plant. It begins by classifying power plants by their fuel sources and prime movers. It then introduces thermal power plants, explaining that they convert the heat energy of coal into electrical energy using a boiler to produce steam that drives a turbine connected to a generator. The document outlines the typical layout and main equipment of a thermal power plant, including coal handling, the boiler, turbine, condenser, and other auxiliary systems. It discusses advantages and limitations of thermal plants and considerations for site selection. Finally, it provides details on several major thermal power plants located in Rajasthan, India.
This slide consists of the basic layout, site plan and the components of a steam power plant. Block diagram of a steam power plant is also present in this slide.
The document provides information about the layout and components of the Raj West Power Plant in Barmer, Rajasthan, India. The plant will be a 1080MW lignite-based thermal power plant using circulating fluidized bed combustion technology. Coal will be sourced from nearby mines through a joint venture company. The general layout and components of a thermal power plant are described, including coal handling, the boiler, turbine, generator, condenser, and ash handling. Key specifications of equipment like circuit breakers and isolators in the switchyard are also mentioned.
This document summarizes a presentation about the Kota Super Thermal Power Station in India. It describes that the power station was established in 1973 along the Chambal River and has a total generation capacity of 1,240MW from its 7 units. The power station uses coal as its fuel, which is pulverized and burned to convert water into high-pressure steam that drives turbines connected to generators. The station employs various processes and equipment to handle coal, produce steam, generate electricity, treat water, and dispose of ash in an environmentally-safe manner. It provides a valuable practical training opportunity for engineering students to learn about large-scale power generation.
SUMMER INTERNSHIP(INDUSTRAIL REPORT) ON THERMAL POWER PLANT Amit Gupta
The document describes the key components and processes involved in a typical coal-fired thermal power plant, including coal handling, pulverizing, combustion in the boiler, steam generation, power generation in the turbine, and condensing spent steam. It also provides details on equipment like draft fans, superheaters, reheaters, the ash handling system, feedwater heaters, and installed capacity of thermal power plants in Rajasthan.
A power station generates electric power by converting mechanical energy into electrical energy using a generator. The mechanical power is usually produced from heat generated by combustion of fuels like coal, natural gas, or oil in a boiler. In thermal power stations, a heat engine like a steam turbine transforms the thermal energy from combustion into rotational energy used to power the generator. The main components of a coal-fired thermal power plant are the coal conveyor, pulverizer, boiler, steam turbine, condenser and cooling towers which work together to generate electricity.
A thermal power plant converts the heat energy from burning coal into electrical energy. Coal is burned in a boiler to produce steam, which spins turbines connected to generators. Thermal power plants account for over 75% of India's total power generation. Key components include the coal handling plant, boiler, turbine, condenser, and cooling system. The steam produced spins the turbine which is connected to the generator, producing electricity that is stepped up and transmitted via transformers.
The document describes the key components and processes involved in a typical coal-fired thermal power plant, including the boiler, turbine, condenser, coal handling equipment, and other auxiliary systems. It also provides diagrams to illustrate the general layout and flow of energy conversion from coal to steam to mechanical power to electricity. Additionally, it briefly mentions some major thermal power plants located in the state of Rajasthan, India.
This document provides a detailed overview of the key components and working principles of a typical coal-fired thermal power plant. The principal components include the boiler, turbines, generator, condenser, cooling tower, and ash handling system. The power plant works on the principle of the Rankine cycle where coal and water are inputs that are converted into steam to power the turbines and generate electricity as the output, with ash and flue gases as wastes. A deaerator is used to remove dissolved gases and oxygen from feedwater before steam production to prevent corrosion.
The document provides an overview of a thermal power plant, including its key components and processes. It begins with an introduction to how thermal power plants convert heat energy from coal into electrical energy. It then describes the general layout of a typical coal-fired thermal power plant and lists its main equipment such as the coal handling plant, pulverizer, boiler, turbine, condenser and cooling towers. Each of these components are then explained in more detail. The document also lists some major thermal power plants located in Rajasthan and references used.
A thermal power plant converts the heat from coal into electrical energy. Coal is burned in a boiler to produce high pressure steam, which spins turbines connected to generators. This generates electricity. The steam is then condensed in a condenser using cooling water, which is cooled in cooling towers or ponds and recycled. Thermal power plants generate over 75% of India's power by converting the thermal energy from combustion into electrical energy.
A thermal power plant converts the heat from coal into electrical energy. Coal is burned in a boiler to produce high pressure steam, which spins turbines connected to generators. This generates electricity. The steam is then condensed in a condenser using cooling water, which is cooled in cooling towers or ponds and recycled. Thermal power plants currently contribute the majority of electricity production in India.
A thermal power plant converts the heat energy from coal into electrical energy. Coal is burned in a boiler to produce high pressure steam, which spins turbines connected to generators. This generates electricity. Thermal power plants contribute most of India's power generation, constituting 75.43% of total installed capacity. Key components include the coal handling plant, boiler, turbine, condenser and cooling systems. The steam produced spins the turbines which drive the generator to produce electricity.
Thermal Power Plant - Full Detail About Plant and Parts (Also Contain Animate...Shubham Thakur
A thermal power station is a power plant in which the prime mover is steam driven. Water is heated, turns into steam and spins a steam turbine which drives an electrical generator. After it passes through the turbine, the steam is condensed in a condenser and recycled to where it was heated; this is known as a Rankine cycle. The greatest variation in the design of thermal power stations is due to the different fossil fuel resources generally used to heat the water. Some prefer to use the term energy center because such facilities convert forms of heat energy into electrical energy.[1] Certain thermal power plants also are designed to produce heat energy for industrial purposes of district heating, or desalination of water, in addition to generating electrical power. Globally, fossil fueled thermal power plants produce a large part of man-made CO2 emissions to the atmosphere, and efforts to reduce these are varied and widespread.
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This document provides an overview of the Bandel Thermal Power Station located in West Bengal, India. It describes the station's 5 operational units with a total installed capacity of 450MW. The document then explains the basic components and processes of a thermal power plant, including coal handling, pulverizing, the draft system, boiler, turbine, ash handling, condenser, cooling towers/ponds, feedwater heating, and air preheating. Diagrams of a typical Rankine cycle and thermal power plant schematic are also included.
The document provides an overview of the Mejia Thermal Power Station (MTPS) located in West Bengal, India. It is owned by the Damodar Valley Corporation and has a total installed capacity of 2340 MW generated from various units. The document describes the key components of the thermal power plant including the coal handling system, pulverizer, boiler, turbine, condenser, and switchyard. It also provides a step-by-step explanation of how coal is converted into electrical energy within the power station.
Industrial training at NTPC ShaktinagarRishikesh .
This document provides an overview of industrial training at a thermal power station in Singrauli, Madhya Pradesh, India. It describes the basic process of how coal is converted into electricity through various components of the power plant. Key components discussed include the coal handling plant, pulverizer, boiler, turbine, condenser, cooling towers, and burner management system. The document also includes diagrams illustrating the general layout and coal to electricity process of a typical coal-fired thermal power station.
This document provides an overview of the key components and processes in a thermal power plant. It describes how coal is combusted to generate steam, which powers turbines connected to generators to produce electricity. The main equipment includes the coal handling plant, pulverizer, boiler, turbine, condenser, cooling towers, feedwater heaters, and auxiliary components like the ash handling plant and electrostatic precipitator. Thermal power plants are one of the primary sources of electricity generation in many countries due to their ability to efficiently convert the chemical energy in coal into electrical energy.
The document provides an overview of the Mejia Thermal Power Station (MTPS) in West Bengal, India. It discusses:
1. MTPS is operated by Damodar Valley Corporation and has a total installed capacity of 2340 MW generated from various units.
2. The power plant layout includes the main equipment used in the generation process such as the coal handling plant, boiler, turbine, condenser, and cooling towers.
3. The stepwise operation begins with coal being burned in the boiler to produce high pressure steam, which is then used to rotate the turbine and generate electricity via the alternator.
The document provides information about Vikas Kr. Singh's summer training at the NTPC power plant in Dadri. It discusses the key details of the power plant, including its installed capacity of 2642 MW from thermal, gas, and solar sources. It describes the basic working of the thermal power generation process, from coal handling to power generation in the turbine and generator. It also summarizes the functions of important components in the plant like the boiler, turbine, condenser, cooling tower, and switchyard equipment.
The document is a PowerPoint presentation about a thermal power plant project submitted by four students. It includes sections on the plant layout, steam and water flows, components of a thermal power plant, and use of water in the plant. The key components discussed are the coal handling plant, boiler, turbine, condenser, feedwater heater and economizer. The presentation explains how coal is burned in the boiler to produce steam, which then rotates the turbine and generates electricity.
A thermal power plant uses steam to generate electricity. Coal is burned in a boiler to produce steam, which spins a turbine connected to a generator. The steam is then condensed in a condenser and recycled to the boiler to repeat the process. The main components are the boiler, turbine, generator, condenser and cooling system. Thermal power plants have the advantages of low cost and reliability but also have the disadvantage of air pollution from coal combustion.
Ntpc dadri thermal power plant & switchyardI.E.T. lucknow
The document provides information about a summer training program at the NTPC power plant in Dadri, India. It discusses the installed capacity of the plant, which includes 1820 MW of thermal capacity and 817 MW of gas capacity. It then describes the various components and processes within the thermal power station, including the coal handling plant, boiler, turbine, condenser, cooling tower, and electrical equipment. It also provides a brief overview of the switchyard station and some of its key electrical components.
INTRODUCTION
THERMODYNAMIC CYCLE OF STEAM FLOW
RANKINE CYCLE (IDEAL , ACTUAL ,REHEAT)
LAYOUT OF STEAM POWER PLANT
MAJOR COMPONENTS AND THEIR FUNCTIONS
ALTERNATOR
EXCITATION SYSTEM
GOVERNING SYSTEM
This document discusses various types of smart materials. It begins with an introduction to smart materials, which are materials that can significantly change one or more properties in a controlled way due to external stimuli like stress, temperature, pH, or electric/magnetic fields. Some examples of smart materials mentioned include piezoelectric materials, shape memory alloys, magnetic shape memory alloys, pH sensitive polymers, halochromic materials, and chromogenic systems. The document then discusses several of these materials in more detail, focusing on piezoelectric materials, shape memory alloys, magnetic shape memory alloys, and pH sensitive polymers. It describes the inputs that trigger changes in these materials and the outputs or changes in properties that result.
The document summarizes a presentation on dual clutch transmissions (DCT). It provides an overview of the history and development of DCT, from its invention in 1939 to its use in modern cars. It describes the components and operation of a 6-speed DCT gearbox, explaining how it differs from manual and automatic transmissions. DCT uses two separate clutches for odd and even gears, allowing direct gear changes without interrupting power flow for a smoother driving experience than manual transmission. It also offers performance advantages over traditional automatic transmissions by being lighter and easier to repair.
Micro-electromechanical systems (MEMS) combine mechanical and electrical components on a silicon chip using microfabrication techniques. MEMS can sense, control, and actuate on a microscale and generate macroscale effects. Common MEMS fabrication techniques include deposition, patterning, etching, and micromachining of materials like silicon and metals. There are three main micromachining methods: bulk micromachining which removes silicon substrate material, surface micromachining which builds up thin films, and high-aspect-ratio micromachining (HARM) which allows molding of high-resolution microstructures. LIGA is a specialized HARM technique that uses x-rays to pattern thick photoresist
- The document presents a seminar on automatic transmissions, beginning with an introduction comparing them to manual transmissions.
- Automatic transmissions use planetary gearsets rather than compound gearsets used in manual transmissions, and do not require a clutch pedal or gear shifting by the driver.
- The major components of an automatic transmission include an ingenious planetary gearset, bands to lock parts of the gearset, wet-plate clutches, a hydraulic system to control the clutches and bands, and a large gear pump.
This presentation discusses continuously variable transmissions (CVTs). It begins with an introduction to transmission systems and the three main types: manual, automatic, and CVT. It then defines a CVT as a transmission that can change seamlessly through an infinite number of gear ratios. The presentation outlines the history and development of CVTs, from da Vinci's sketches to their use in modern cars. It describes the two most common types of CVTs: pulley-based and toroidal. It concludes with examples of CVT applications in vehicles, machinery, and a simulation comparing the fuel efficiency of a manual vs. CVT in an Audi A6.
Motor vehicles are a major source of air pollution. They emit carbon monoxide, hydrocarbons, nitrogen dioxide, particulate matter, and sulfur dioxide, which can damage health. Delhi has extremely high air pollution levels, with vehicles contributing around 75% of emissions. The number of vehicles in Delhi has grown rapidly without sufficient expansion of road infrastructure, leading to traffic jams and higher emissions. Various cities have implemented measures like congestion pricing, car-free days, and phasing out older vehicles to reduce vehicle emissions and improve air quality.
If we're running two pumps, why aren't we getting twice as much flow? v.17Brian Gongol
A single pump operating at a time is easy to figure out. Adding a second pump (or more) makes things a bit more complicated. That complication can deliver a whole lot of additional flow -- or it can become an exercise in futility.
The Control of Relative Humidity & Moisture Content in The AirAshraf Ismail
To many of us Relative Humidity (RH%) & Moisture Content (g/ kg) are confusing terms & we often don't know which one of them to choose in order to highlight our "Humidity" issues!
This post is to briefly address the definition of Relative Humidity, Moisture Content , Moisture Load Sources & Humidity Control Hazard!
Vijay Engineering and Machinery Company (VEMC) is a leading company in the field of electromechanical engineering products and services, with over 70 years of experience.
3. 3
A Thermal Power Plant converts the heat energy of
coal into electrical energy. It works on basic Rankine
cycle. Coal is burnt in a boiler which converts water
into steam. The expansion of steam in turbine produces
mechanical power which drives the alternator coupled
to the turbine. After this steam is condensed in the
condenser and again sent to the boiler by pump.
Thermal Power Plants contribute maximum to the
generation of Power for any country . Thermal Power
Plants constitute 75.43% of the total installed captive
and non-captive power generation in India
4. 4
Vindhyachal Thermal Power Station, Madhya
Pradesh with an installed capacity of 4,760MW
owned and operated by NTPC.
The 4,620MW Mundra Thermal Power Station
located in the Kutch district of Gujarat is currently
the second biggest operating thermal power plant in
India owned and operated by Adani Power.
The 4,000MW Mundra Ultra Mega Power Plant
(UMPP), also located in the Kutch district of Gujarat,
ranks as the third largest thermal power plant in
India owned and operated by Coastal Gujarat Power
Limited (CGPL), a subsidiary of Tata Power.
Talcher Super Thermal Power Station or NTPC
Talcher Kaniha, located in the Angul district of
Odisha, is a 3,000MW coal-fired power plant owned
and operated by NTPC.
5. 5
1.Boiler
• A boiler or steam generator is a closed vessel in
which water under pressure, is converted into
steam.
• Always designed to absorb maximum amount
of heat released in the process of combustion.
Boilers are of two types-
a. Fire tube boiler
b. Water tube boiler
6. 6
2. STEAM TURBINE
A steam turbine converts heat energy of steam into
mechanical energy and drives the generator. This
energy conversion basically occurs in two steps:
a. The high pressure, high temperature steam first
expands in nozzles and comes out at a high velocity.
b. The high velocity jets of steam coming out of the
nozzles, impinge on the blades mounted on a wheel,
gets deflected by an angle and suffer a loss of
momentum which is absorbed by the rotating wheel
in producing torque.
These are of two types :-
Impulse turbine
Reaction turbine
8. 8
3. Condenser
Condenser refers to the shell and tube heat exchanger
(or surface condenser) installed at the outlet of every
steam turbine. The purpose is to condense the outlet
(or exhaust) steam from steam turbine to
obtain maximum efficiency and also to get the
condensed steam in the form of pure water, otherwise
known as condensate, back to steam generator or
(boiler) as boiler feed water.
10. 10
4. Pump
Condensate Extraction Pumps (CEP) extract the
condensate water from the condenser and increase
its pressure to the original. Extraction pump is usually
a vertical shaft, two stage, centrifugal pump, which is
used in applications involving high pressure and high
volume. Centrifugal pumps are of the type, which due
to their high capacity, require a specific minimum
suction head to operate. The condensate water is
drawn from the condenser by the extraction pump and
send to the low pressure feed water heater.
11. 11
5. Feed Water Heater (FWH):
A feedwater heater is used in a
conventional power plant to preheat
boiler feed water. The source of heat
is steam bled from the turbines.There
are basically two types of FWH:
a. Open type FWH (Deaerator):
In this type of FWH , the extracted
steam is allowed to mix with FW.
A deaerator is a device that is widely
used for the removal of oxygen and
other dissolved gases from the
feedwater to steam-generating boilers.
At least one open type FWH i.e.
deaerator is needed in every power
plant.
12. 12
b. Closed type FWH:
These are typically shell and tube type heat
exchanger where the feed-water passes throughout
the tubes and is heated by turbine extraction steam.
These do not require separate pumps before and
after the heater to boost the feed-water to the
pressure of the extracted steam as with an open
heater. They are further divided into high pressure
FWH and low pressure FWH.
Low pressure FWH: It is situated between
condensate pump and deaerator. It normally
extract the steam from low pressure turbine.
High pressure FWH: It is located after the boiler
feed pump and extract the steam from high
pressure turbine.
14. 14
6. Economiser:
Flue gases coming out of the boiler carry lot of heat.
An economiser extracts a part of this heat from flue
gases and uses it for heating feed water. This use of
economiser result in saving coal consumption and
higher boiler efficiency.
7. Superheater:
Super heater is used to remove the moisture
content from the steam. It raises the temperature of
steam above 540 degree C.
8. Boiler Drum:
The main function of boiler drum is
to store water and steam sufficiently
to meet varying load requirement
and to separate vapour or steam
from water-steam mixture.
15. 15
10. Air preheater:
After flue gases leave economizer, some further heat can be
extracted from them and used to heat incoming air. Preheated air
increases the combustion rate and since the air is heated by the
exhaust gases, fuel consumption is reduced. Due to higher
temperature of air, furnace temperature increases, so low grade coal
can be burnt efficiently.
9. Reheater:
Some of the heat of superheated steam is used to rotate the
turbine where it loses some of its energy. Reheater is also steam
boiler component in which heat is added to this intermediate-
pressure steam, which has given up some of its energy in
expansion through the high-pressure turbine. The steam after
reheating is used to rotate the second steam turbine where the
heat is converted to mechanical energy.
16. 16
11. Electrostatic Precipitator (ESP):
It is particulate collection device that removes
particles from a flowing gas using the force of an
induced electrostatic charge. Boilers burning
pulverised coal produce 20% bottom ash and 80% fly
ash. Bottom ash are collected under the furnace in a
water filled ash hooper. For flyash an ESP is needed.
17. 17
12. Cooling Tower:
Cooling tower is a steel or concrete hyperbolic
structure having a reservoir at the base for storage of
cooled water. A condenser needs huge quantity of
water to condense the steam. The cooling tower can
be either mechanical draught or natural draught.
18. 18
13. Draught/Draft system:
The function of the draft system is basically:
a. To supply to the furnace the required quantity of air for
complete combustion of fuel.
b. To remove the gaseous products of combustion from
the furnace and throw these through chimney to
atmosphere.
For this purpose two types of fan are used:
i. Force Draught (FD) fan: FD fans are installed at inlet
to the air preheater. They handle cold air. It supplies
combustion air to the steam generator.
ii. Induced Draught (ID) fan: Id fans are basically
located at the foot level of stack/chimney. They
handle hot combustion gases and remove the flue
gas from the furnace and exhaust them through the
chimney into the atmosphere.
Another fan is used in coal handling plant called Primary Air (PA) fan.
It supplies air to dry and transport pulverised coal to the furnace.
19. 19
D i a g r a m o f a t y p i c a l c o a l -
f i r e d t h e r m a l p o w e r s t a t i o n
1. Cooling tower 10. Steam Control valve 19. Superheater
2. Cooling water pump 11. High pressure steam turbine 20. Forced draught (draft) fan
3. transmission line (3-phase) 12. Deaerator 21. Reheater
4. Step-up transformer (3-phase) 13. Feed water heater 22. Combustion air intake
5. Electrical generator (3-phase)14. Coal conveyor 23. Economiser
6. Low pressure steam turbine 15. Coal hopper 24. Air preheater
7. Condensate pump 16. Coal pulveriser 25. Precipitator
8. Surface condenser 17. Boiler steam drum 26. Induced draught (draft) fan
9. Intermediate pressure steam
turbine
18. Bottom ash hopper 27. Flue gas stack