350MW火电机组热电解耦深度调峰技术研究

Research on Deep Peak Regulation Technology of Thermo-electrolytic Couplingfor 350MW Thermal Power Units

针对东北地区某350MW火电机组,通过研究抽汽改造、抽汽改造+电极式水蓄热系统、抽汽改造+固体蓄热系统等3种热电解耦技术方案,综合考虑调峰收益、投资成本、占地面积等因素,确定了不同调峰目标下的最优深度调峰改造方案,并对最优方案的调峰收益进行分析。研究得出,综合考虑多种因素,当调峰目标40%时,抽汽改造方案为最优灵活性改造方案;当调峰目标30%时,抽汽改造+电极式锅炉水蓄热系统为最优方案。与抽汽改造方案相比,抽汽改造+电极式锅炉水蓄热系统方案调峰收益显著,年调峰收益比抽汽改造方案增加了223%,有效地提升了机组调峰能力。

According to a 350MW thermal power unit in northeast China,through studying three kinds of thermo-electrolytic coupling technology schemes,i.e.steam extraction reform,steam extraction reform and electrode water heat storage system,steam extraction reform and solid heat storage system,and considering the factors such as peak shaving income,investment cost and floor space,the optimal deep peak shaving reform scheme under different peak shaving targets is determined,and the peak shaving income of the optimal scheme is analyzed.The study shows that considering various factors,when the peak shaving target is 40%,the extraction steam reforming scheme is the optimal flexible reforming scheme.When the peak shaving target is 30%,steam extraction modification and electrode boiler water heat storage system is the optimal scheme.Compared with the steam extraction modification scheme,the steam extraction modification and electrode boiler water heat storage system scheme has significant peak shaving benefits,with the annual benefits increasing by 223%compared with the steam extraction modification scheme,effectively improving the peak shaving capability of the unit.