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Dynamic analysis of the boiler drum of a coal-fired thermal power plant

机译：燃煤热电厂锅炉汽包的动态分析

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The subcritical coal-fired boilers of thermal power plants consist of a combustion chamber, economizer unit, drum unit (drum, riser, and downcomer), superheater unit (primary superheater, secondary superheater, and final superheater), and reheater unit. The input and output of these units are highly interactive in nature. The efficiency of the subcritical plants is only around 33%. The efficiency needs to be increased to produce more power for the increasing demand, which can be achieved only by implementing supercritical technology or ultra-supercritical technology. However, the conversion of existing subcritical power plants to supercritical power plants is impossible due to the installation cost. So in order to increase the overall efficiency of the existing subcritical power plants, boilers of such units must be examined in order to find safer operational practices. This paper highlights the mathematical modeling of the economizer unit and drum unit of boiler, which can help in enhancing the performance of the boiler system of the power plant. Mass and energy balances for the integrating boiler units have been formulated using first principle laws. The developed model has then been validated with actual plant data obtained from a 210MW coal-fired thermal power plant. The performance of the open loop responses of the model are analyzed and are included in the results and discussion of the paper. The model provides support for level, pressure, and temperature measurements and predictions. The effect of changes in the parameters of the boiler are studied and discussed in detail.
机译：火电厂的亚临界燃煤锅炉由燃烧室，节能器单元，鼓式单元（鼓，立管和降液管），过热器单元（一级过热器，二级过热器和最终过热器）和再热器单元组成。这些单元的输入和输出本质上是高度交互的。亚临界工厂的效率仅为33％左右。需要提高效率以为不断增长的需求产生更多的功率，这只能通过实施超临界技术或超超临界技术来实现。但是，由于安装成本，将现有的亚临界发电厂转换为超临界发电厂是不可能的。因此，为了提高现有亚临界发电厂的整体效率，必须对此类机组的锅炉进行检查，以找到更安全的操作方法。本文着重介绍了锅炉省煤器和鼓式机组的数学模型，可以帮助提高电厂锅炉系统的性能。集成锅炉单元的质量和能量平衡已使用第一原理定律制定。然后使用从210MW燃煤火力发电厂获得的实际工厂数据对开发的模型进行验证。分析了模型的开环响应的性能，并将其包括在结果和本文的讨论中。该模型为液位，压力和温度的测量和预测提供支持。研究和讨论了锅炉参数变化的影响。

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