The first high-power photothermal steam turbine unit in China was successfully developed
From Dongfang Electric Group Dongfang Steam Turbine Co., Ltd., on June 9th, China Guangdong Nuclear Delingha 50,000 kilowatts unit independently developed by Dongfang Electric Group Dongfang Steam Turbine Co., Ltd. completed the idle load test at the industrial turbine division and successfully Turned to the rated speed, it also successfully completed 110% of the overspeed test, the indicators are excellent. At this point, it marks the successful development of the first high-power photothermal turbine unit in China. After the unit is delivered, it will become the first high-power solar thermal power turbine to be put into operation in China. On September 14, 2016, the National Energy Administration formally released the Notice of the National Energy Administration on the Construction of a Solar Thermal Power Demonstration Project. A total of 20 projects were selected as the first batch of China's first demonstration projects of CSP, with a total installed capacity of 1.35 GW. China's solar thermal power construction has entered a peak period. Solar-thermal-thermal steam turbines are the main power equipment for solar thermal power generation. Photo-thermal power generation is an important direction for the use of new solar energy. It is different from traditional solar photovoltaic power generation technology. It collects solar thermal energy through solar islands and exchanges them. The heat device converts it into heat energy to heat the steam and introduce the steam into the steam turbine for energy conversion and work to achieve solar power generation. Compared with photovoltaic power generation, CSP combined with molten salt heat storage technology can achieve 24-hour power generation, with rapid peak-shaving function, no environmental pollution during construction, commissioning, and at the same time, the cost of scale will be lower than photovoltaic power generation in the future. Therefore, the advantages are obvious. The development of CSP turbines is difficult, and there are many technical problems that have constrained the development of solar thermal power generation technology. The research and development team of Dongqi Industrial Turbo combines the combined cycle unit and the development experience of China's unique 25~100MW grade reheat turbine. Solved the structural difficulties of the coaxial arrangement of high-voltage rotors, gearboxes, generator rotors, and low- and medium-pressure rotors of solar thermal power generators. According to the special operation mode of solar thermal power station and the characteristics of other systems of Dongqi combined power station, the start-stop requirements of the CSP turbine are clearly defined, the internal clearance structure of the turbine is optimized, and the stress level at the start and stop of the turbine components is reduced and passed. Scientific simulations have guaranteed the fast start-stop performance of CSP turbines. In addition, through the cooperation with well-known universities in China, the life expectancy of the important components of the steam turbine was predicted and a life-cycle management plan was formulated, which laid a solid foundation for the stable operation of the solar-thermal-thermal power turbine in the service cycle, and met the need for quick start and stop of the unit daily. demand. At the same time, through a large number of basic researches, numerical simulations, and prototype tests, Dongqi has optimized the thermal system of CSP turbines, optimised the intake mode of cylinders, and raised the economic efficiency of CSPs to a new level. After continuous technological innovation and accumulation, Dongqi emerged from the world's major steam turbine manufacturers, and won the bid for the first domestic solar thermal power commercial power station, the China Guangdong Nuclear Delingha 50MW trough power station project, with advanced technological advantages. The successful development of the Delingha project is of great significance to Donggang’s entry into the solar power sector and its capture of the commanding heights in the solar thermal power generation market. (Zhong Ping reporter Zhou Hong) The Pervious Concrete Floor System is a kind of porous, lightweight, non-fine aggregate concrete. The surface of the coarse aggregate is coated with a layer of cement to adhere to each other to form a honeycomb structure with even distribution of pores. Therefore, it has water permeability, air permeability and quality. Lightweight features: Permeable concrete as environmental load-reducing concrete has different characteristics from ordinary concrete, namely, low bulk density, insignificant water capillary phenomenon, high water permeability, less amount of cement material, simple construction, environmental protection, and ecological type. 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