等效热降法的火电厂低压加热器疏水系统改进设计

发布时间：2018-05-17 09:53

本文选题：等效热降法 + 火电厂　；参考：《科学技术与工程》2017年33期

【摘要】：当前火电厂低压加热器疏水系统通常采用疏水逐级方式,这是因为其实现过程较为简单,然而疏水逐级回流需排挤低压抽汽,会导致不可逆损失的产生。因此,提出一种新的基于等效热降法的火电厂低压加热器疏水系统改进设计方法。介绍了当前火电厂低压加热器疏水系统选择的逐级回流运行形式,对其弊端进行分析。介绍了等效热降法,在此基础上,设计和分析了选用疏水泵和疏水冷却器的火电厂低压加热器疏水改进系统。将某火电厂作为研究对象,给出原始数据和等效热降计算结果,依据该结果,通过计算加热器的热经济性确定最终的改进方案。将改进后系统和改进前系统电能损耗进行比较,结果表明,改进后系统节能性高,成本低。
[Abstract]:At present, the drainage system of low-pressure heater in thermal power plant usually adopts the method of hydrophobic stepwise, which is because of its simple realization process. However, the drainage step by step reflux needs to squeeze out low-pressure extraction steam, which will lead to irreversible loss. Therefore, a new improved design method based on the equivalent heat drop method for the drainage system of low pressure heaters in thermal power plants is proposed. This paper introduces the stage by stage backflow operation form of the drainage system of low pressure heater in thermal power plant, and analyzes its disadvantages. The equivalent heat drop method is introduced. On the basis of this, an improved drainage system for low-pressure heaters in thermal power plants is designed and analyzed. Taking a thermal power plant as the research object, the original data and the equivalent heat drop calculation results are given. According to the results, the final improvement scheme is determined by calculating the thermal economy of the heater. The power consumption of the improved system is compared with that of the improved system. The results show that the improved system has high energy saving and low cost.
【作者单位】：南京工程学院能源与动力工程学院;
【基金】：南京工程学院青年基金(QKJA201504)资助
【分类号】：TM621

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