Steam Power Plant
Electrical equipment in power plant
A modern power station contains numerous electrical equipment. However, the most important items are: (i) Alternators. Each alternator is coupled to a steam turbine and converts mechanical energy of turbine into electrical energy. The alternator may be hydrogen or air cooled. The necessary excitation is provided by means of main and pilot exciters directly coupled to the alternator shaft. (ii) Transformers. A generation station has different types of transformers, viz., (a) main step -up transformers which step-up the generation voltage for transmission of power. (b) station transformers which are used for general service (e.g., lighting) in the power station. (c) auxiliary transformers which supply to individual unit-auxiliaries. (iii)Switchgear. It houses such equipment which read more
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Water treatment for power plant
Boiler require clean and soft water for longer life and better efficiency.However, the source of boiler feed water is generally a river or lake which may contain suspended and dissolved impurities,dissolved gases etc. Therefore, it is very important that water is first purified and softened by chemical treatment and then delivered to the boiler.The water from the source of supply id stored in storage tanks.The suspended impurities are removed through sedimentation, coagulation and filtration. Dissolved gases are removed by aeration and degasification. The water is ’softened, by removing temporary and permanent hardness through different chemical processes. The pure and soft water thus available is fed to the boiler for steam generation.Picture of a water treatment plant is shown read more
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