Abstract—

The operation of a steam boiler in a sliding pressure mode is characterized by certain advantages in comparison with the usual mode of equipment operation: it becomes possible to reduce the power unit’s minimum allowable load, reduce the electric energy expenditures for driving the feed pump, and reduce the specific reference fuel consumption. Increasing the equipment energy efficiency is a priority task for all power plants. Shifting a power unit for operation in a sliding pressure mode is a universal way to solve this problem irrespectively of the boiler type (drum or once-through) and the kind of combusted fuel (coal, natural gas, or fuel oil). Up to date, practical implementation of boiler operation in a sliding pressure mode has not received wide application in Russia. The existing examples of a power unit’s operation at sliding pressure are mainly associated with the transient conditions of equipment operation and are only related to once-through boilers. In drum boilers, practical studies of their operation at sliding pressure were not carried out in view of certain difficulties connected with the change of heat transfer conditions in the waterwall heating surfaces. The article presents the results of activities aimed at shifting the Cherepet state-owned district power plant (SDPP) 225-MW power units equipped with Ep-630-13.8-565/570KT (the TPE-223 model) drum boilers for operation at sliding pressure. These boilers use grade D coal from the Kuznetsk field as the main fuel. The operation of the power units was modeled using the Boiler Designer computer program, and a procedure for estimating the economic feasibility of shifting the power units to operate at sliding pressure was elaborated. Based on the results of preliminary studies, operational and adjustment tests of the power units were carried out, which confirmed the possibility and economic feasibility of shifting them to operation in the sliding pressure mode. The study results are presented, and the possibility of extending such practices to a significant part of the operating boiler and turbine equipment at the power plants of Russia is evaluated.

中文翻译：

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Cherepet 国有区域电厂 225 MW 发电机组转移的经验，该电厂配备 TPE-223 滚筒锅炉以在滑压模式下运行

摘要-

蒸汽锅炉在滑压模式下运行与通常的设备运行模式相比具有一定的优势：可以降低动力装置的最小允许负荷，减少驱动给水泵的电能消耗，以及降低特定参考油耗。提高设备能效是所有电厂的首要任务。无论锅炉类型（鼓式或直流式）和燃烧燃料的种类（煤、天然气或燃油），将动力装置切换为以滑压模式运行是解决此问题的通用方法。迄今为止，锅炉滑压运行的实际实施在俄罗斯尚未得到广泛应用。现有的机组滑压运行实例主要与设备运行的瞬态条件有关，仅与直流锅炉有关。在汽包锅炉中，由于与水冷壁受热面传热条件的变化有关的某些困难，没有对其在滑动压力下的运行进行实际研究。本文介绍了旨在将配备 Ep-630-13.8-565/570KT（TPE-223 型号）汽包锅炉的 Cherepet 国有区域发电厂 (SDPP) 225 兆瓦发电机组转移到滑动运行的活动结果。压力。这些锅炉使用来自库兹涅茨克油田的 D 级煤作为主要燃料。使用 Boiler Designer 计算机程序对动力装置的运行进行建模，并详细阐述了估计将动力装置转换为在滑动压力下运行的经济可行性的程序。根据初步研究结果，对动力装置进行了运行和调整试验，证实了将其转换为滑压模式运行的可能性和经济可行性。介绍了研究结果，并评估了将这种做法扩展到俄罗斯发电厂运行的锅炉和涡轮机设备的重要部分的可能性。这证实了将它们转移到滑动压力模式下运行的可能性和经济可行性。介绍了研究结果，并评估了将这种做法扩展到俄罗斯发电厂运行的锅炉和涡轮机设备的重要部分的可能性。这证实了将它们转移到滑动压力模式下运行的可能性和经济可行性。介绍了研究结果，并评估了将这种做法扩展到俄罗斯发电厂运行的锅炉和涡轮机设备的重要部分的可能性。