新型热电联产汽轮机系统研究

Study on New Steam Turbine System for Cogeneration

为提高火电机组的生存与盈利能力,文章对不同汽轮机供热系统的技术特点进行分析,其优缺点也进行研究对比。低压缸零出力的2种方式可以一定程度上提升供热能力且供热经济性较好,但是低负荷供热能力仍然存在一定不足。高低旁供热可以大幅提升供热能力且能满足深度调峰要求,但是供热经济性较差。文章提出一种新型热电联产汽轮机系统,既保证机组全负荷下供热能力,又保证了机组整体供热经济性。

In order to improve the survivability and profitability of thermal power units, the technical characteristics of different steam turbine heating systems are analyzed, their advantages and disadvantages are studied and compared. The two methods of lowpressure cylinder with zero output can improve the heating capacity to a certain extent and the heating economy is better, but the low-load heating capacity is insufficient. High and low bypass heating is able to greatly increase the heating capacity and meet the demand for deep peak-regulation, but the heating economy is poor. This paper proposes a new type of combined heat and power steam turbine system, which not only ensures the heat supply capacity of the unit, but also ensures the overall heat supply economy of the unit.