Thermal Power Plant Operation Books
This book illustrates operation and maintenance practices/guidelines for economic generation and managing health of a thermal power generator beyond its regulatory.
The world's largest coal-fired power station, in,. A thermal power station is a in which is converted to.
In most of the places in the world the is -driven. Water is heated, turns into steam and spins a which drives an. After it passes through the turbine, the steam is in a and recycled to where it was heated; this is known as a. The greatest variation in the design of thermal power stations is due to the different heat sources; dominates here, although nuclear heat energy and solar heat energy are also used. Some prefer to use the term energy center because such facilities convert forms of into electrical energy. Certain thermal power stations also are designed to produce heat energy for industrial purposes, or, or of water, in addition to generating electrical power. Contents.
Types of thermal energy Almost all, petroleum, and, as well as many natural gas power stations are thermal. Is frequently in as well as. The from a gas turbine, in the form of hot exhaust gas, can be used to raise steam, by passing this gas through a (HRSG) the steam is then used to drive a steam turbine in a plant that improves overall efficiency. Power stations burning coal, or natural gas are often called. Some -fueled thermal power stations have appeared also.
Non-nuclear thermal power stations, particularly fossil-fueled plants, which do not use are sometimes referred to as conventional power stations. Commercial power stations are usually constructed on a large scale and designed for continuous operation. Virtually all Electric power stations use to produce alternating current (AC) electric power at a of 50 Hz or 60. Large companies or institutions may have their own power stations to supply or electricity to their facilities, especially if steam is created anyway for other purposes.
Steam-driven power stations have been used to drive most ships in most of the 20th century until recently. Steam power stations are now only used in large nuclear ships. Shipboard power stations usually directly couple the turbine to the ship's propellers through gearboxes. Power stations in such ships also provide steam to smaller turbines driving electric generators to supply electricity. Is, with few exceptions, used only in naval vessels. There have been many ships in which a steam-driven turbine drives an electric generator which powers an for. Combined heat and power (CH&P) facilities, often called plants, produce both electric power and heat for process heat or space heating, such as steam and hot water.
History The initially developed has been used to produce mechanical power since the 18th Century, with notable improvements being made. Free program gothic 2 noc kruka poradnik. When the first commercially developed central electrical power stations were established in 1882 at in New York and in London, reciprocating steam engines were used. The development of the in 1884 provided larger and more efficient machine designs for central generating stations. By 1892 the turbine was considered a better alternative to reciprocating engines; turbines offered higher speeds, more compact machinery, and stable speed regulation allowing for parallel synchronous operation of generators on a common bus. After about 1905, turbines entirely replaced reciprocating engines in large central power stations.
The largest reciprocating engine-generator sets ever built were completed in 1901 for the Manhattan Elevated Railway. Each of seventeen units weighed about 500 tons and was rated 6000 kilowatts; a contemporary turbine set of similar rating would have weighed about 20% as much. Thermal power generation efficiency. A with a two-stage and a single feed water heater.
The energy efficiency of a conventional thermal power station, considered salable energy produced as a percent of the of the fuel consumed, is typically 33% to 48%. As with all heat engines, their efficiency is limited, and governed by the laws of. Other types of power stations are subject to different efficiency limitations, most in the United States are about 90 percent efficient in converting the energy of falling water into electricity while the efficiency of a is limited by, to about 59.3%.
The energy of a thermal power station not utilized in power production must leave the plant in the form of heat to the environment. This can go through a and be disposed of with or in. If the waste heat is instead utilized for, it is called. An important class of thermal power station are associated with facilities; these are typically found in desert countries with large supplies of and in these plants, freshwater production and electricity are equally important co-products. The dictates that higher efficiencies can be attained by increasing the temperature of the steam. Sub-critical fossil fuel power stations can achieve 36–40% efficiency.
Designs have efficiencies in the low to mid 40% range, with new 'ultra critical' designs using pressures of 4400 psi (30.3 MPa) and multiple stage reheat reaching about 48% efficiency. Above the for of 705 °F (374 °C) and 3212 psi (22.06 MPa), there is no from water to steam, but only a gradual decrease in. Currently most of the nuclear power stations must operate below the temperatures and pressures that coal-fired plants do, in order to provide more conservative safety margins within the systems that remove heat from the nuclear fuel rods.
This, in turn, limits their thermodynamic efficiency to 30–32%. Some advanced reactor designs being studied, such as the, and, would operate at temperatures and pressures similar to current coal plants, producing comparable thermodynamic efficiency. Electricity cost. See also: The direct cost of electric energy produced by a thermal power station is the result of cost of fuel, capital cost for the plant, operator labour, maintenance, and such factors as ash handling and disposal. Indirect, social or environmental costs such as the economic value of environmental impacts, or environmental and health effects of the complete fuel cycle and plant decommissioning, are not usually assigned to generation costs for thermal stations in utility practice, but may form part of an environmental impact assessment.
Typical coal thermal power station. Typical diagram of a coal-fired thermal power station 1. Cooling water pump 11. High pressure 20. Forced draught (draft) 3. Step-up 13. Air intake 5.
Low pressure 15. Induced draught (draft) 9.
Intermediate pressure 18. For units over about 200 capacity, redundancy of key components is provided by installing duplicates of the forced and induced draft fans, air preheaters, and fly ash collectors. On some units of about 60 MW, two boilers per unit may instead be provided.
The has the 200 largest power stations ranging in size from 2,000MW to 5,500MW. Boiler and steam cycle In the field, refers to a specific type of large used in a (PWR) to thermally connect the primary (reactor plant) and secondary (steam plant) systems, which generates steam. In a nuclear reactor called a (BWR), water is boiled to generate steam directly in the reactor itself and there are no units called steam generators. In some industrial settings, there can also be steam-producing heat exchangers called (HRSG) which utilize heat from some industrial process, most commonly utilizing hot exhaust from a gas turbine. The steam generating boiler has to produce steam at the high purity, pressure and temperature required for the steam turbine that drives the electrical generator. Do not need a boiler since they use naturally occurring steam sources.
Heat exchangers may be used where the geothermal steam is very corrosive or contains excessive suspended solids. A fossil fuel steam generator includes an, a, and the with its steam generating tubes and superheater coils. Necessary are located at suitable points to relieve excessive boiler pressure. The air and path equipment include: forced draft (FD), (AP), boiler furnace, induced draft (ID) fan, fly ash collectors ( or ) and the. Feed water heating and deaeration The used in the boiler is a means of transferring heat energy from the burning fuel to the mechanical energy of the spinning.
The total feed water consists of recirculated condensate water and purified makeup water. Because the metallic materials it contacts are subject to at high temperatures and pressures, the makeup water is highly purified before use.
A system of and demineralizers produces water so pure that it coincidentally becomes an electrical, with in the range of 0.3–1.0 per centimeter. The makeup water in a 500 MWe plant amounts to perhaps 120 US gallons per minute (7.6 L/s) to replace water drawn off from the boiler drums for water purity management, and to also offset the small losses from steam leaks in the system. The feed water cycle begins with condensate water being pumped out of the after traveling through the steam turbines. The condensate flow rate at full load in a 500 MW plant is about 6,000 US gallons per minute (400 L/s).
Diagram of boiler feed water deaerator (with vertical, domed aeration section and horizontal water storage section). The water is pressurized in two stages, and flows through a series of six or seven intermediate feed water heaters, heated up at each point with steam extracted from an appropriate duct on the turbines and gaining temperature at each stage.
Typically, in the middle of this series of feedwater heaters, and before the second stage of pressurization, the condensate plus the makeup water flows through a that removes dissolved air from the water, further purifying and reducing its corrosiveness. The water may be dosed following this point with, a chemical that removes the remaining in the water to below 5 (ppb). It is also dosed with control agents such as or to keep the residual low and thus non-corrosive.
Boiler operation The boiler is a rectangular about 50 feet (15 m) on a side and 130 feet (40 m) tall. Its walls are made of a web of high pressure steel tubes about 2.3 inches (58 mm) in diameter. Is air-blown into the furnace through burners located at the four corners, or along one wall, or two opposite walls, and it is ignited to rapidly burn, forming a large fireball at the center.
The of the fireball heats the water that circulates through the boiler tubes near the boiler perimeter. The water circulation rate in the boiler is three to four times the throughput.
As the water in the circulates it absorbs heat and changes into steam. It is separated from the water inside a drum at the top of the furnace. The saturated steam is introduced into pendant tubes that hang in the hottest part of the combustion gases as they exit the furnace.
Here the steam is superheated to 1,000 °F (540 °C) to prepare it for the turbine. Plants designed for (brown coal) are increasingly used in locations as varied as, and. Lignite is a much younger form of coal than black coal. It has a lower energy density than black coal and requires a much larger furnace for equivalent heat output. Such coals may contain up to 70% water and, yielding lower furnace temperatures and requiring larger induced-draft fans.
The firing systems also differ from black coal and typically draw hot gas from the furnace-exit level and mix it with the incoming coal in fan-type mills that inject the pulverized coal and hot gas mixture into the boiler. Plants that use gas turbines to heat the water for conversion into steam use boilers known as (HRSG). The exhaust heat from the gas turbines is used to make superheated steam that is then used in a conventional water-steam generation cycle, as described in section below. Boiler furnace and steam drum The water enters the boiler through a section in the convection pass called the. From the economizer it passes to the and from there it goes through downcomers to inlet headers at the bottom of the water walls. From these headers the water rises through the water walls of the furnace where some of it is turned into steam and the mixture of water and steam then re-enters the steam drum. This process may be driven purely by (because the water is the downcomers is denser than the water/steam mixture in the water walls) or assisted by pumps.
In the steam drum, the water is returned to the downcomers and the steam is passed through a series of and dryers that remove water droplets from the steam. The dry steam then flows into the superheater coils. The boiler furnace auxiliary equipment includes feed nozzles and igniter guns, water lancing and observation ports (in the furnace walls) for observation of the furnace interior. Furnace due to any accumulation of combustible gases after a trip-out are avoided by flushing out such gases from the combustion zone before igniting the coal. The steam drum (as well as the coils and headers) have air vents and drains needed for initial start up. Superheater Fossil fuel power stations often have a section in the steam generating furnace.
The steam passes through drying equipment inside the steam drum on to the superheater, a set of tubes in the furnace. Here the steam picks up more energy from hot flue gases outside the tubing, and its temperature is now superheated above the saturation temperature. The superheated steam is then piped through the main steam lines to the valves before the high-pressure turbine.
Nuclear-powered steam plants do not have such sections but produce steam at essentially saturated conditions. Experimental nuclear plants were equipped with fossil-fired super heaters in an attempt to improve overall plant operating cost. Steam condensing The condenser condenses the steam from the exhaust of the turbine into liquid to allow it to be pumped. If the condenser can be made cooler, the pressure of the exhaust steam is reduced and efficiency of the increases. Diagram of a typical water-cooled surface condenser. The surface condenser is a in which cooling water is circulated through the tubes.
The exhaust steam from the low-pressure turbine enters the shell, where it is cooled and converted to condensate (water) by flowing over the tubes as shown in the adjacent diagram. Such condensers use or -driven exhausts for continuous removal of air and gases from the steam side to maintain. For best efficiency, the temperature in the condenser must be kept as low as practical in order to achieve the lowest possible pressure in the condensing steam. Since the condenser temperature can almost always be kept significantly below 100 °C where the of water is much less than atmospheric pressure, the condenser generally works under. Thus leaks of non-condensible air into the closed loop must be prevented. Typically the cooling water causes the steam to condense at a temperature of about 25 °C (77 °F) and that creates an in the condenser of about 2–7 (0.59–2.07 ), i.e.
A of about −95 kPa (−28 inHg) relative to atmospheric pressure. The large decrease in volume that occurs when water vapor condenses to liquid creates the low vacuum that helps pull steam through and increase the efficiency of the turbines. The limiting factor is the temperature of the cooling water and that, in turn, is limited by the prevailing average climatic conditions at the power station's location (it may be possible to lower the temperature beyond the turbine limits during winter, causing excessive condensation in the turbine). Plants operating in hot climates may have to reduce output if their source of condenser cooling water becomes warmer; unfortunately this usually coincides with periods of high electrical demand for. The condenser generally uses either circulating cooling water from a to reject waste heat to the atmosphere, or once-through water from a river, lake or ocean. A Marley mechanical induced draft cooling tower The heat absorbed by the circulating cooling water in the condenser tubes must also be removed to maintain the ability of the water to cool as it circulates.
This is done by pumping the warm water from the condenser through either natural draft, forced draft or induced draft (as seen in the adjacent image) that reduce the temperature of the water by evaporation, by about 11 to 17 °C (20 to 30 °F)—expelling to the atmosphere. The circulation flow rate of the cooling water in a 500 unit is about 14.2 m³/s (500 ft³/s or 225,000 US gal/min) at full load. The condenser tubes are made of or to resist corrosion from either side.
Nevertheless, they may become internally fouled during operation by bacteria or algae in the cooling water or by mineral scaling, all of which inhibit heat transfer and reduce. Many plants include an automatic cleaning system that circulates sponge rubber balls through the tubes to scrub them clean without the need to take the system off-line. The cooling water used to condense the steam in the condenser returns to its source without having been changed other than having been warmed. If the water returns to a local water body (rather than a circulating cooling tower), it is often tempered with cool 'raw' water to prevent thermal shock when discharged into that body of water.
Another form of condensing system is the air-cooled condenser. The process is similar to that of a and fan. Exhaust heat from the low-pressure section of a steam turbine runs through the condensing tubes, the tubes are usually finned and ambient air is pushed through the fins with the help of a large fan.
The steam condenses to water to be reused in the water-steam cycle. Air-cooled condensers typically operate at a higher temperature than water-cooled versions. While saving water, the efficiency of the cycle is reduced (resulting in more carbon dioxide per megawatt-hour of electricity). From the bottom of the condenser, powerful recycle the condensed steam (water) back to the water/steam cycle. Reheater Power station furnaces may have a reheater section containing tubes heated by hot flue gases outside the tubes.
Exhaust steam from the high-pressure turbine is passed through these heated tubes to collect more energy before driving the intermediate and then low-pressure turbines. Air path External fans are provided to give sufficient air for combustion. The Primary air fan takes air from the atmosphere and, first warms the air in the air preheater for better economy. Primary air then passes through the coal pulverizers, and carries the coal dust to the burners for injection into the furnace.
The Secondary air fan takes air from the atmosphere and, first warms the air in the air preheater for better economy. Secondary air is mixed with the coal/primary air flow in the burners. The induced draft fan assists the FD fan by drawing out combustible gases from the furnace, maintaining a slightly negative pressure in the furnace to avoid leakage of combustion products from the boiler casing. Steam turbine generator. Rotor of a modern steam turbine, used in a power station The turbine generator consists of a series of steam interconnected to each other and a generator on a common shaft.
There is usually a high-pressure turbine at one end, followed by an intermediate-pressure turbine, and finally one, two, or three low-pressure turbines, and the generator. As steam moves through the system and loses pressure and thermal energy, it expands in volume, requiring increasing diameter and longer blades at each succeeding stage to extract the remaining energy. The entire rotating mass may be over 200 metric tons and 100 feet (30 m) long. It is so heavy that it must be kept turning slowly even when shut down (at 3 ) so that the shaft will not bow even slightly and become unbalanced. This is so important that it is one of only six functions of blackout emergency power batteries on site. (The other five being, station alarms, generator hydrogen seal system, and turbogenerator lube oil.) For a typical late 20th-century power station, superheated steam from the boiler is delivered through 14–16-inch (360–410 mm) diameter piping at 2,400 psi (17 MPa; 160 atm) and 1,000 °F (540 °C) to the high-pressure turbine, where it falls in pressure to 600 psi (4.1 MPa; 41 atm) and to 600 °F (320 °C) in temperature through the stage.
It exits via 24–26-inch (610–660 mm) diameter cold reheat lines and passes back into the boiler, where the steam is reheated in special reheat pendant tubes back to 1,000 °F (540 °C). The hot reheat steam is conducted to the intermediate pressure turbine, where it falls in both and and exits directly to the long-bladed low-pressure turbines and finally exits to the condenser. The generator, 30 feet (9 m) long and 12 feet (3.7 m) in diameter, contains a stationary and a spinning, each containing miles of heavy conductor—no permanent here. In operation it generates up to 21,000 at 24,000 (504 MWe) as it spins at either 3,000 or 3,600, synchronized to the. The rotor spins in a sealed chamber cooled with gas, selected because it has the highest known of any gas and for its low, which reduces losses. This system requires special handling during startup, with air in the chamber first displaced by before filling with hydrogen. This ensures that a highly hydrogen– environment is not created.
The is 60 across and 50 Hz in, ( and parts of are notable exceptions) and parts of. The desired frequency affects the design of large turbines, since they are highly optimized for one particular speed.
The electricity flows to a distribution yard where increase the voltage for transmission to its destination. The have auxiliary systems enabling them to work satisfactorily and safely. The steam turbine generator, being rotating equipment, generally has a heavy, large-diameter shaft.
The shaft therefore requires not only supports but also has to be kept in position while running. To minimize the frictional resistance to the rotation, the shaft has a number of. The bearing shells, in which the shaft rotates, are lined with a low-friction material like. Oil lubrication is provided to further reduce the friction between shaft and bearing surface and to limit the heat generated. Stack gas path and cleanup. See also: and As the combustion exits the boiler it is routed through a rotating flat basket of metal mesh which picks up heat and returns it to incoming fresh air as the basket rotates.
This is called the. The gas exiting the boiler is laden with, which are tiny spherical ash particles.
The flue gas contains along with combustion products, and. The fly ash is removed.
Once removed, the fly ash byproduct can sometimes be used in the manufacturing of. This cleaning up of flue gases, however, only occurs in plants that are fitted with the appropriate technology. Still, the majority of coal-fired power stations in the world do not have these facilities. Legislation in Europe has been efficient to reduce flue gas pollution. Japan has been using flue gas cleaning technology for over 30 years and the US has been doing the same for over 25 years. China is now beginning to grapple with the pollution caused by coal-fired power stations.
Where required by law, the sulfur and nitrogen oxide are removed by which use a pulverized or other wet slurry to remove those pollutants from the exit stack gas. Other devices use catalysts to remove Nitrous Oxide compounds from the flue gas stream. The gas travelling up the may by this time have dropped to about 50 °C (120 °F). A typical flue gas stack may be 150–180 metres (490–590 ft) tall to disperse the remaining flue gas components in the atmosphere.
The tallest flue gas stack in the world is 419.7 metres (1,377 ft) tall at the in,. In the United States and a number of other countries, studies are required to determine the flue gas stack height needed to comply with the local regulations. The United States also requires the height of a flue gas stack to comply with what is known as the ' (GEP)' stack height. In the case of existing flue gas stacks that exceed the GEP stack height, any air pollution dispersion modeling studies for such stacks must use the GEP stack height rather than the actual stack height.
Fly ash collection is captured and removed from the flue gas by electrostatic precipitators or fabric bag filters (or sometimes both) located at the outlet of the furnace and before the induced draft fan. The fly ash is periodically removed from the collection hoppers below the precipitators or bag filters. Generally, the fly ash is pneumatically transported to storage silos for subsequent transport by trucks or railroad cars. Bottom ash collection and disposal At the bottom of the furnace, there is a hopper for collection of. This hopper is always filled with water to quench the ash and clinkers falling down from the furnace. Some arrangement is included to crush the clinkers and for conveying the crushed clinkers and bottom ash to a storage site.
Ash extractor is used to discharge ash from Municipal solid waste–fired boilers. Auxiliary systems Boiler make-up water treatment plant and storage Since there is continuous withdrawal of steam and continuous return of to the boiler, losses due to and leakages have to be made up to maintain a desired water level in the boiler steam drum. For this, continuous make-up water is added to the boiler water system. Impurities in the raw water input to the plant generally consist of and salts which impart to the water. Hardness in the make-up water to the boiler will form deposits on the tube water surfaces which will lead to overheating and failure of the tubes.
Thus, the salts have to be removed from the water, and that is done by a water demineralising treatment plant (DM). A DM plant generally consists of cation, anion, and mixed bed exchangers. Any ions in the final water from this process consist essentially of hydrogen ions and hydroxide ions, which recombine to form pure water. Very pure DM water becomes highly corrosive once it absorbs oxygen from the atmosphere because of its very high affinity for oxygen. The capacity of the DM plant is dictated by the type and quantity of salts in the raw water input. However, some storage is essential as the DM plant may be down for maintenance.
For this purpose, a storage tank is installed from which DM water is continuously withdrawn for boiler make-up. The storage tank for DM water is made from materials not affected by corrosive water, such as. The piping and valves are generally of stainless steel.
Sometimes, a steam blanketing arrangement or stainless steel doughnut float is provided on top of the water in the tank to avoid contact with air. DM water make-up is generally added at the steam space of the (i.e., the vacuum side). This arrangement not only sprays the water but also DM water gets deaerated, with the dissolved gases being removed by a de-aerator through an ejector attached to the condenser. Fuel preparation system.
Conveyor system for moving coal (visible at far left) into a power station. In coal-fired power stations, the raw feed coal from the coal storage area is first crushed into small pieces and then conveyed to the coal feed hoppers at the boilers. The coal is next into a very fine powder. The pulverizers may be, rotating drum, or other types of grinders. Some power stations burn rather than coal. The oil must kept warm (above its ) in the fuel oil storage tanks to prevent the oil from congealing and becoming unpumpable.
The oil is usually heated to about 100 °C before being pumped through the furnace fuel oil spray nozzles. Boilers in some power stations use as their main fuel. Other power stations may use processed natural gas as auxiliary fuel in the event that their main fuel supply (coal or oil) is interrupted. In such cases, separate gas burners are provided on the boiler furnaces. Barring gear (or 'turning gear') is the mechanism provided to rotate the turbine generator shaft at a very low speed after unit stoppages. Once the unit is 'tripped' (i.e., the steam inlet valve is closed), the turbine coasts down towards standstill. When it stops completely, there is a tendency for the turbine shaft to deflect or bend if allowed to remain in one position too long.
This is because the heat inside the turbine casing tends to concentrate in the top half of the casing, making the top half portion of the shaft hotter than the bottom half. The shaft therefore could warp or bend by millionths of inches. This small shaft deflection, only detectable by eccentricity meters, would be enough to cause damaging vibrations to the entire steam turbine generator unit when it is restarted. The shaft is therefore automatically turned at low speed (about one percent rated speed) by the barring gear until it has cooled sufficiently to permit a complete stop. Oil system An auxiliary oil system pump is used to supply oil at the start-up of the steam turbine generator. It supplies the hydraulic oil system required for steam turbine's main inlet steam stop valve, the governing control valves, the bearing and seal oil systems, the relevant hydraulic relays and other mechanisms. At a preset speed of the turbine during start-ups, a pump driven by the turbine main shaft takes over the functions of the auxiliary system.
Generator cooling While small generators may be cooled by air drawn through filters at the inlet, larger units generally require special cooling arrangements. Gas cooling, in an oil-sealed casing, is used because it has the highest known of any gas and for its low which reduces losses. This system requires special handling during start-up, with air in the generator enclosure first displaced by before filling with hydrogen. This ensures that the highly hydrogen does not mix with in the air. The hydrogen pressure inside the casing is maintained slightly higher than to avoid outside air ingress.
The hydrogen must be sealed against outward leakage where the shaft emerges from the casing. Mechanical seals around the shaft are installed with a very small annular gap to avoid rubbing between the shaft and the seals.
Seal oil is used to prevent the hydrogen gas leakage to atmosphere. The generator also uses water cooling. Since the generator coils are at a potential of about 22, an insulating barrier such as Teflon is used to interconnect the water line and the generator high-voltage windings. Demineralized water of low conductivity is used. Generator high-voltage system The generator voltage for modern utility-connected generators ranges from 11 kV in smaller units to 30 kV in larger units.
The generator high-voltage leads are normally large aluminium channels because of their high current as compared to the cables used in smaller machines. They are enclosed in well-grounded aluminium bus ducts and are supported on suitable insulators.
The generator high-voltage leads are connected to step-up for connecting to a high-voltage (usually in the range of 115 kV to 765 kV) for further transmission by the local power grid. The necessary and metering devices are included for the high-voltage leads. Thus, the steam turbine generator and the transformer form one unit. Smaller units may share a common generator step-up transformer with individual circuit breakers to connect the generators to a common bus.
Monitoring and alarm system Most of the power station operational controls are automatic. However, at times, manual intervention may be required. Thus, the plant is provided with monitors and alarm systems that alert the plant operators when certain operating parameters are seriously deviating from their normal range.
Battery-supplied emergency lighting and communication A central battery system consisting of units is provided to supply emergency electric power, when needed, to essential items such as the power station's control systems, communication systems, generator hydrogen seal system, turbine lube oil pumps, and emergency lighting. This is essential for a safe, damage-free shutdown of the units in an emergency situation. Circulating water system. Main article: Most thermal stations use coal as the main fuel.
Raw coal is transported from to a power station site by, or cars. Generally, when shipped by railways, the coal cars are sent as a full train of cars. The coal received at site may be of different sizes. The railway cars are unloaded at site by rotary dumpers or side tilt dumpers to tip over onto conveyor belts below. The coal is generally conveyed to crushers which crush the coal to about 3⁄ 4 inch (19 mm) size.
Thermal Power Plant Wikipedia
The crushed coal is then sent by belt conveyors to a storage pile. Normally, the crushed coal is compacted by bulldozers, as compacting of highly volatile coal avoids spontaneous ignition. The crushed coal is conveyed from the storage pile to silos or hoppers at the boilers by another belt conveyor system. See also. Maury Klein, The Power Makers: Steam, Electricity, and the Men Who Invented Modern America Bloomsbury Publishing USA, 2009.
Archived from on May 27, 2010. Retrieved 2011-09-25., October 2009.
British Electricity International (1991). Modern Power Station Practice: incorporating modern power system practice (3rd Edition (12 volume set) ed.). ^ Babcock & Wilcox Co. Steam: Its Generation and Use (41st ed.). ^ Thomas C. Elliott, Kao Chen, Robert Swanekamp (coauthors) (1997). Standard Handbook of Powerplant Engineering (2nd ed.).
McGraw-Hill Professional. CS1 maint: Multiple names: authors list. (PDF).
^ from website of the Air Pollution Training Institute. ^ 2007-09-27 at the. Figure 3a, Layout of surface condenser (scroll to page 11 of 34 pdf pages). (Editor in Chief) (1936). Kents’ Mechanical Engineers’ Handbook (Eleventh edition (Two volumes) ed.). John Wiley & Sons (Wiley Engineering Handbook Series).
Maulbetsch, John; Zammit, Kent (2003-05-06). Cooling Water Intakes. Washington, DC: US Environmental Protection Agency. Archived from (PDF) on March 9, 2008.
Retrieved 2006-09-10. EPA Workshop on Cooling Water Intake Technologies, Arlington, Virginia. Beychok, Milton R. Guideline for Determination of Good Engineering Practice Stack Height (Technical Support Document for the Stack Height Regulations), Revised, 1985, EPA Publication No. EPA–450/4–80–023R, U.S. Environmental Protection Agency (NTIS No.
PB 85–225241). Lawson, Jr., R. Snyder, 1983.
Determination of Good Engineering Practice Stack Height: A Demonstration Study for a Power Plant, 1983, EPA Publication No. Environmental Protection Agency (NTIS No. PB 83–207407). Michelle T. Van Vliet, David Wiberg, Sylvain Leduc & Keywan Riahi (4 January 2016). Nature Climate Change.
6: 375–380.:. Retrieved 28 March 2016.
Thermal Power Plants
CS1 maint: Multiple names: authors list External links. on and on video lectures by S. Banerjee on 'Thermal Power Plants'.
Thermal Power Plant Ppt
Thermal Power Plant: Design and Operation deals with various aspects of a thermal power plant, providing a new dimension to the subject, with focus on operating practices and troubleshooting, as well as technology and design. Its author has a 40-long association with thermal power plants in design as well as field engineering, sharing his experience with professional engineers under various training capacities, such as training programs for graduate engineers and operating personnel. Thermal Power Plant presents practical content on coal-, gas-, oil-, peat- and biomass-fueled thermal power plants, with chapters in steam power plant systems, start up and shut down, and interlock and protection. Its practical approach is ideal for engineering professionals. Focuses exclusively on thermal power, addressing some new frontiers specific to thermal plants Presents both technology and design aspects of thermal power plants, with special treatment on plant operating practices and troubleshooting Features a practical approach ideal for professionals, but can also be used to complement undergraduate and graduate studies.