超临界燃褐煤锅炉热力设备动态特性研究

发布时间：2018-01-09 14:24

本文关键词：超临界燃褐煤锅炉热力设备动态特性研究　出处：《工程热物理学报》2017年01期 　论文类型：期刊论文

【摘要】：随着我国太阳能、风能等发电装机容量的迅速增长,电网对火电机组的调峰需求越来越高,火电机组运行呈现负荷波动大、频率高的特点。为研究火电机组的动态特性,本文以某600 MW超临界燃褐煤直流锅炉为例,建立了系统主要热力设备的动态模型,进而研究获得了这些设备的动态特性。结果表明,各设备在系统中的位置、作用各不相同,其动态特性也有差异。以响应时间为例,省煤器、回转式空预器和制粉系统的动态响应时间最长,约700 s以上,其次是水冷壁、过热器和再热器,约400 s,泵与风机的动态时间很短,在研究机组的动态过程时可以忽略。
[Abstract]:With the rapid growth of the installed capacity of solar and wind power generation in China, the demand for peak-shaving of thermal power units is increasing, and the load fluctuation of thermal power units is large. In order to study the dynamic characteristics of thermal power units, a 600 MW supercritical lignite once-through boiler is taken as an example, and the dynamic model of the main thermal equipment of the system is established. Then the dynamic characteristics of these equipments are obtained. The results show that the position and function of each equipment in the system are different, and its dynamic characteristics are also different. Take the response time as an example, economizer. The dynamic response time of rotary air preheater and pulverizing system is the longest, about 700 s, followed by water wall, superheater and reheater, about 400 s, and the dynamic time of pump and fan is very short. It can be neglected when studying the dynamic process of the unit.
【作者单位】：西安交通大学动力工程多相流国家重点实验室;西安西热节能技术有限公司;
【基金】：国家自然科学基金(No.51436006) 国家重点基础研究计划项目(No.2015CB251504)
【分类号】：TM621
【正文快照】： 0引言随着发电技术的不断完善与成熟,发电设备呈现高参数、大容量的特点。随着我国电力总装机容量的增长,特别是太阳能、风能等可再生能源装机容量迅速增加,越来越多的火电机组参与电网大谷峰差的调峰[1_气火电机组运行必将出现负荷波动大、频率高等特点,将经历更多、变化

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