Simulation of Feedwater Pump Turbine Steam Source Switching Mode

[Asia Fluid Network News] Feedwater pump steam turbines on the thermal power plant cycle impact, it is composed of the main components of the system. Feedwater pump turbines play an important role in supercritical units with high parameters and large capacity. The safety and reliability of feedwater pumps directly affect the plant operation of the entire plant. As its role continues to highlight, the events of its related topics have also attracted the attention of many users, especially the "Feedwater Pump Turbine steam source switching mode simulation", then this is a kind of situation? Feedwater pump Turbine steam source switching mode simulation When working with low pressure gas source can not meet the needs of the feed water pump turbine to work, it will switch the spare high pressure gas source for its supply of steam. Therefore, in some special working environments where gas source switching is required, the way of gas source switching has a great influence on the rapid response capability of the water supply system. Under the condition of 100% T-MCR, back pressure and low pressure inlet valves Fault closed. In the case of small back pressure changes, the operation of the external switch unit is more stable, but the internal switch mode is more adaptable to the back pressure sudden change and suitable for long-term operation of units with large back pressure changes. In the mutation and low pressure intake valve fault closed condition, relative to the low-pressure control when they are fully open, it will open the high-pressure valve to switch the source of external feed pump turbine, the use of high-pressure control valve to control the low-pressure valve inlet pressure The adjustment mode can respond to outside interference faster, so as to reduce the negative impact on the stable operation of the generating unit. As the turbine speed gradually increased to the target value, the control panel shows the performance indicators fully meet the design requirements, in warm applause, industry experts and users from the Design Institute, power plants and other witness to this historic moment, Marked in the future construction of China's million-kilowatt-class ultra-supercritical thermal power unit is no longer dominated the world of imported water pump turbines. In recent years, in order to achieve energy conservation and emission reduction and improve primary energy utilization, the market demand for ultra-supercritical million-kilowatt high-efficiency generating units is more and more. In order to occupy commercial opportunities and technical commanding heights as soon as possible, many companies have begun to make correlative Problem research and development. Feed water pump turbines need to have the features include safe, reliable, high level of automation, load adaptability. Although the production of water pump turbines is currently only available to a few companies for independent production and research and development, it is believed that as China's economy and technology develop, it will be more convenient to develop and produce water pump turbines.

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