火电机组灵活供热技术比较及运行特性分析  

Comparison and Performance Analysis Flexible Heating Technology of Thermal Power Units

作　　者：刘丁赫 马聪 王勇 周托 孙瑞彬 尚曼霞 LIU Ding-he;MA Cong;WANG Yong;无(College of Electrical and Power Engineering,Taiyuan University of Technology;Tianjin Development Area Branch,Huadian Power International Co.,Ltd.;Department of Energy and Power Engineering,Tsinghua University)

机构地区：[1]太原理工大学,山西太原030024 [2]华电国际电力股份有限公司天津开发区分公司 [3]清华大学

出　　处：《电站系统工程》2021年第3期1-4,6,共5页Power System Engineering

基　　金：中国华电集团有限公司重大科技项目计划(CHDKJ19-01-88)资助。

摘　　要：阐述了几种火电机组实现灵活供热的技术方案,比较与分析了背压改造、高低压缸旁路改造、增加电极锅炉以及集成热泵提升热电解耦能力的技术特点。通过模型计算了纯凝和背压机组改造后,机组的供电/供热能力、热电解耦范围以及能量利用系数等,主要结论如下:机组采用高低压旁路改造的投资小,但是热电解耦的负荷范围低于35%,且热经济性不佳,适用于对热电解耦能力要求不大的供热系统;机组通过增加电极锅炉和集成热泵改造后,理论上热电解耦负荷范围可以达到100%,但电极锅炉属于能量的高品低用,热经济性最差;集成热泵供热的热经济性最好,其能量利用系数最高可达到1.47,但其设备投资较高,占地面积较大,不适用于蒸汽供热。Several technical schemes for achieving flexible heating of thermal power units are described,and compares and analyzes the technical characteristics of backpressure transformation,high pressure cylinder bypass transformation,adding electrode boilers,and integrating heat pumps to enhance the ability of thermoelectric decoupling.After the transformation of condensing and backpressure units,the unit’s power supply/heating capacity,thermo-electrolytic coupling range,and energy utilization coefficient are calculated through the model.The main conclusions are as follows:the unit adopts high and low-voltage bypass to reform the investment is small,but the thermal electrolysis load range of the coupling is less than 35%,and the thermal economy is not good;after the unit is modified by adding electrode boilers and integrated heat pumps,the theoretical thermal electrolytic coupling load range reach 100%,but the electrode boiler’s thermal economy is the worst;the integrated heat pump heating has the best thermal economy,and its energy utilization coefficient can reach 1.47,but its equipment investment is relatively high and not suitable for steam suppling.

关 键 词：火电机组 热电解耦 电厂调峰 热经济性 能量利用系数 

分 类 号：TK114[动力工程及工程热物理—热能工程]