The Flow Path Reformation Project And Performance Analysis Based On 600MW Steam Turbines In Shangdu Power Plant

In recent years,there has been much more intense competition in energy fields leading to a narrowing profit space in power plant.The steam turbine is the largest power plant energy consuming equipment.In order to save energy and meet the national standards of power plants,the power plant ought to reduce steam consumption and improve the efficiency of the steam turbine.Shangdu power plant accelerates its pace of reformation of generation units under the background of national advocation of environmental protection.The No.3 unit put into operation in 2007.As a fully air-cold power plant in frigid areas,the unit is excellent at performance.With the operation of new units and the introduction of new technologies,the benefits of the power generating units in Shangdu power plant,the coal consumption has been greatly improved.According to the 2011 domestic coal consumption ranking,the best coal consumption is 309g/Kwh while the units reached to 330g/KWh in Shangdu,which is left far behind.The situation puts forward new requirements for unit reform so as to improve the efficiency of units and decrease the energy consumption.The No.3 unit is overhauled in 2013,the design energy consumption reached to 7994KJ/KWh while the actual energy consumption is 8440KJ/KWh which is 446 above the design parameter.The designed efficiency of high-pressure cylinder is 86.9% while the experiment value is 83.1%,the deviation is-3.8%.The designed efficiency of medium-pressure cylinder is 92.5% while the experiment value is 90.4%,the deviation is-2.1%.The Dong Fang Turbine Company has improved its design level greatly East in recent years and cooperated with turbine manufacturer,universities and scholar institutes at home and abroad.They find their way to methods solving efficiency problems of their turbines by chronically designation,analysis and manufacturing.It is necessary for Shangdu units to reform the cylinders and decrease energy consumption by adopting the latest design of passage part.The transformation will greatly improve the efficiency of cylinder unit.The heat consumption and exert force will be improved greatly,which will benefit enormously in economic merits and social benefits.