Monitoring and diagnosis of the steam turbine flow passage is the most important premise to achieve the power plant condition maintenance. The existing characteristic flow area of steam turbine changes with main steam flow and can not accurately reflect the flow passage state of steam turbine. In order to reflect the state change in turbine passage accurately, the characteristic flow area of steam turbine stage should be investigated in the same main steam flow. Because main steam flow on-line measuring method accuracy is deficient, a new method based on the exhaust pressure of IP cylinder as character parameter of main steam flow is proposed, and a correction method which takes the impact of the heat regenerative system on main steam flow into consideration is presented. Meanwhile, in the diagnostic process, the measuring result is strongly influenced by the system inevitable measuring error which directly affects the deviation between the characteristic flow area and its standard. Thus confidence intervals of characteristic flow area is given to eliminate the system errors. Finally, the actual diagnostic example in the article indicates the practicability of the method. It can be used to diagnose the flow passage of steam turbine and provide reliable basis to find out the steam turbine potential.
在电厂锅炉运行过程中,全面提高节能降耗技术应用水平是必要的,通过有效技术的运用不仅提高了锅炉运行效率,也进一步保证了电厂经济效益,同时还能为环保事业提供有效助力.基于此,相关技术人员应全面探索更加高效的节能降耗技术手段,加强技术运用与管理能力,从而全面提高电厂锅炉运行质量.
智慧电厂理念的提出是基于设备智能控制系统,对于火力发电厂锅炉、汽轮机和电机等三大主机设备的智能化运行开发尤为重要.介绍了超超临界锅炉智能运行系统在智慧电厂的应用研究,应用实时动态大数据技术和强大的人机协调计算能力,实现智慧电厂实时优化技术和先进控制技术.
W火焰锅炉炉膛宽度大,大风箱结构的二次风容易出现配风不均,导致炉膛局部缺氧和水冷壁壁温偏差等问题,通过运行调整手段已无法解决.根据测试结果,对风箱结构进行了优化改造,采用分区控制的方式进行配风.通过对改造后的风箱进行调整试验,大幅降低了炉膛内Co含量,有效提高了锅炉效率和机组经济性;实现了二次风"前墙压后墙"的配风方式,增加了运行人员调节手段,有效控制了壁温偏差.
