Analysis And Research On The Domestic Import Type300MW Steam Turbine Flow Path Retrofit

With the rapid development of our economy, the power industry obtained make a spurtof progress to expand, domestic600MW and1000MW units have been put into production,the grid has been to adopt energy-saving generation dispatching, single300MW and thecapacity of the power plant energy consumption is in inferior position apparently, causes theunit to use hour of number decreased year by year. In the "coal market, plan electricity" mode,power profit has been substantially compressed, stand-alone capacity of small thermal powerplant for energy consumption due to a high power supply is low, is confronted with hithertounknown survival pressure.At the same time, the global warming problem grows in intensity, as a greenhouse gasemissions--large coal-fired power plant became the contradictory focal point. In operationand environmental protection under the dual pressure, energy saving and emission reducingcapacity of small coal-fired power plants are the only way out.With the development of modern thermodynamics and fluid mechanics theory innovation,especially the rapid development of computer technology,3D design and manufacturingtechnology maturity, in turbine design and manufacture has been widely applied. Large-scaleprecision machining equipment and the introduction of key technology improvement,produced by domestic manufacturers of steam turbine components technology and qualitygreatly, makes the original heating system on the basis of the existing steam turbine,according to the advanced design concepts of possible. The entire three-dimensionalaerothermodynamic Design System as the core of the steam turbine flow path retrofittechnology, energy-saving emission reduction are the feasible measures.This article through to the domestic steam turbine main problems undertake an analysis,elaborated the basic principle of steam turbine flow path retrofit and advanced technology.Focuses on the analysis of Guangdong Power Group Shajiao A power station#unit5300MWturbine flow alteration to take the specific technical measures, the transformation of therationality argument.The authors insight into the steam turbine performance test code, to heat loss rate asevaluation index, put forward unit after retrofitting flow path of performance appraisal testmethod, establishes the corresponding performance calculation mathematical model, todetermine the units of flow path retrofit is successful exploration.