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Modeling for the performance evaluation of 600 MW supercritical unit operating No.0 high pressure heater

机译：运行于0号高压加热器的600 MW超临界机组性能评估建模

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Adding the No.0 high pressure heater to raise feed water temperature has been proven to be an effective way to increasing input rate of selective catalytic reduction device (SCR) under low load in coal-fired power plant. However, the method has heavy influence on the operation economy of unit. To quantitatively evaluate the influence of feed water temperature on the operation performance of unit, a simplified one-dimensional nonlinear model for a 600 MW super critical unit with No.0 high pressure heater was presented based on methods of furnace heat balance, differential deviation and thermodynamics, and validated by the field operation parameters. Meanwhile, the impact of feed water temperature on the performance of unit was discussed, and the influence mechanism of it was obtained. The results obtained from incurrent study could provide useful guidance in choosing the optimal process that can help increase efficiency and acquire a reasonable Start-Stop of SCR system in super critical units with No.0 high pressure heater. (C) 2018 Published by Elsevier Ltd.
机译：事实证明，添加0号高压加热器来提高给水温度是燃煤电厂低负荷下提高选择性催化还原装置（SCR）输入速率的有效方法。但是，该方法对单元的运行经济性有很大影响。为了定量评估给水温度对机组运行性能的影响，基于炉内热平衡，微分偏差和微分法，提出了一种600MW超临界机组零号高压加热器的简化一维非线性模型。热力学，并通过现场操作参数验证。同时讨论了给水温度对机组性能的影响，并得出了影响机理。当前研究的结果可为选择最佳工艺提供有用的指导，该工艺可帮助提高效率并在配备0号高压加热器的超临界机组中获得合理的SCR系统起停。 （C）2018由Elsevier Ltd.发布

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