Coal power plants work by using several steps to convert stored energy in coal to usable electricity that we find in our home that powers our lights, computers, and sometimes, back into heat for our homes.
The steam leaving the turbine is condensed and the water is pumped back for reuse in the boiler.
Ash extractors are used to discharge ash from municipal solid waste—fired boilers. 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 deaerator   that removes dissolved air from the water, further purifying and reducing its corrosiveness.
A fossil fuel steam generator includes an economizera steam drumand the furnace with its steam generating tubes and superheater coils. The dry steam then flows into the superheater coils.
As the water in the boiler circulates it absorbs heat and changes into steam. Condenser The condenser condenses the steam from the exhaust of the turbine into liquid to allow it to be pumped.
In the steam drum, the water is returned to the downcomers and the steam is passed through a series of steam separators and dryers that remove water droplets from the steam. 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 system requires special handling during start-up, with air in the generator enclosure first displaced by carbon dioxide before filling with hydrogen. Hydrogen gas cooling, in an oil-sealed casing, is used because it has the highest known heat transfer coefficient of any gas and for its low viscosity which reduces windage losses.
In addition to reducing the effects of backpressure, the bellows also serve to isolate the spindle guide and the spring from the process fluid, this is important when the fluid is corrosive.
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. It is important, therefore, that there is some mechanism for detecting any uncharacteristic fluid flow through the bellows vents.
China is now beginning to grapple with the pollution caused by coal-fired power stations. 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. There is generally no permanent magnetthus preventing black starts.
In direct contact type exhaust steam is mixed with directly with D. To minimize the frictional resistance to the rotation, the shaft has a number of bearings. Necessary safety valves are located at suitable points to relieve excessive boiler pressure.
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. The process is similar to that of a radiator and fan. 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 steam is then condensed and pumped back into the boiler to repeat the cycle. The oil must kept warm above its pour point in the fuel oil storage tanks to prevent the oil from congealing and becoming unpumpable. Because the metallic materials it contacts are subject to corrosion at high temperatures and pressures, the makeup water is highly purified before use.
Thus leaks of non-condensible air into the closed loop must be prevented. Air-cooled condensers typically operate at a higher temperature than water-cooled versions. The heat from combustion of the coal boils water in the boiler to produce steam.
The steam is then piped to a turbine. In the United States and a number of other countries, atmospheric dispersion modeling  studies are required to determine the flue-gas stack height needed to comply with the local air pollution regulations.
Coal Fired Thermal Power Plant: 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. 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.
This fan forces the atmospheric air through the boiler furnace and pushes out the hot gases from the furnace through superheater, reheater, economiser and air heater to stacks.“Energy and Efficiency analysis of MWe coal base Thermal Power Plant with running parameters” Goutam Khankari,DVC,Kolkata.
More about Coal Burning Power Plants. Coal-fired Power Plant Words | 6 Pages; Impact of Coal vs Uranium Power Plants Essay Words | 8 Pages; Future Challenges in Coal Based Power Plants. Coal based power plant 1. COAL BASED THERMALCOAL BASED THERMAL POWER PLANTPOWER PLANT Ash Handling Plant 6.
Electrical Equipments Major Components of Coal Based Thermal Power Plants Major Components of Coal Based Thermal Power Plants 8. Steam Flow DiagramSteam Flow Diagram Safety valves. monitor and, if necessary, regulate how coal is used for power generation.
The tools and techniques described will be of value to anyone with an interest in the more sustainable use of coal. A project to examine coal-fired power plant efficiency and performance was called for in the Plan of Action. Narmada Thermal Power Limited At Survey no,A,B,, Village: Padaria, Taluka: Vagra, OR COAL BASED POWER PLANT AL POWER LIMITED NMENTAL IMPACT ASSESSMENT REPO FOR MADA THERMAL POWER LIMITED /28 OCCUPATIONAL HEALTH AND SAFETY In this chapter is going to be presented the function and some other aspects of a coal-fired power plant.
First of all as coal-fired power p Fair Use Policy Coal Fired Power Plants Engineering Essay. Print Reference this In this section it is presented the basic principle on which it is based the operation of a coal fired power plant. Clean Coal Technologies The Boy Scout motto “be prepared” certainly applies when it comes to power plant employee safety.
Comprehensive training, detailed pre-job planning, and proper and.Download