【标题】300MW高背压供热机组运行参数调整原则

【Title】The principles of adjusting operation parameters in a 300MW high backpressure heating unit

【摘要】高背压供热机组，使用热网循环水作为凝汽器的冷却水，由于热网循环水流量比原来的海水流量低很多，所以凝汽器真空对循环水回水温度和流量的变化非常敏感。凝汽器真空下降时快捷有效的处理原则只有一个，即降低高背压机组低压缸蒸汽流通量。真空较低同时低压缸排汽量较低，会造成容积流量减少叶片动应力增加，造成效率的大幅下降并产生鼓风，使排汽温度过高，影响机组安全运行。根据高背压机组凝汽器真空等级，控制低压缸进汽压力在一定数值之上，确保低压缸排汽温度正常。

【Abstract】High backpressure heating unit used heat-supply circulating water as the cooling water of condenser. Owing to the lower flux of heat-supply circulating water, the condenser vacuum is sensitive to the change of the return water temperature and the flux of circulating water. There is only one principle to deal with the condenser vacuum’s running down: reducing the steam flow of the low pressure cylinder in a high backpressure heating unit. The vacuum is low as well as the gas displacement of the low pressure cylinder, it results in the increase of leaf blade dynamic stress and the decrease of volume flow. In addition, it causes a sharp decrease of efficiency and air-blasting, which makes high exhaust gas temperature and affects the safe work of the units. According to the level of the condenser cylinder in high backpressure heating unit, controlling the inlet steam pressure of low pressure cylinder under a certain value and insuring the regular temperature of the inlet steam are necessary.

【关键词】高背压机组正常运行；凝汽器真空；低压缸排汽温度；控制和调整

【Keywords】the safe work of the High backpressure heating unit；the condenser vacuum；the exhaust gas temperature of low pressure cylinder；controlling and adjustment

【作者】

王刚	：华电青岛发电有限公司，山东省青岛市市北区兴隆一路6号 邮编；266031;
李振	：华电青岛发电有限公司，山东省青岛市市北区兴隆一路6号 邮编；266031;

【Author】

WANG Gang	: Huadian Qingdao Power Generation Corporation Limited，Qingdao 266031，China;
LI Zhen	: Huadian Qingdao Power Generation Corporation Limited，Qingdao 266031，China;

【来源】2016年中国电机工程学会年会论文集

【出版时间】Tue Nov 15 00:00:00 CST 2016