直接空冷机组超低背压运行技术  

Ultra-Low Back Pressure Operation Technology of Direct Air Cooling Unit

作　　者：石红晖 马庆中 曹蓉秀 康朝斌 SHI Hong-hui;MA Qing-zhong;CAO Rong-xiu;KANG Chao-bin(Guodian Science and Technology Power Research Institute Co.Ltd.,Nanjin,China,200046)

机构地区：[1]国电科学技术研究院有限公司,江苏南京200046

出　　处：《热能动力工程》2020年第11期21-25,共5页Journal of Engineering for Thermal Energy and Power

基　　金：国家科技支撑计划课题(2014BAA06B02)。

摘　　要：针对直接空冷供热机组设备和系统运行特性,从运行经济性、安全性和灵活性分析了实施超低背压运行技术的必要性,提出了提高空冷系统抽真空设备极限抽真空能力和优化抽真空系统管道等技术措施。结果表明:机组实施超低背压技术改造后,直接空冷机组运行背压降至2~3 kPa,系统安全稳定运行;为机组参与深度调峰,提升机组运行灵活性和提高供热能力提供技术支撑;为机组系统运行节能优化、冷端系统设计优化等提供有益技术途径。According to the equipment and operation characteristics of direct air-cooled heating unit,the necessity of implementing ultra-low back pressure operation technology is analyzed from the aspects of operation economy,operation safety and operation flexibility.Technical measures such as improving the ultimate vacuum capacity of the vacuum equipment of the air cooling system and optimizing the pipeline of the vacuum system are proposed,which can reduce the resistance of the vacuum pipeline and eliminate the resistance bottleneck.The results show that after the unit implements the ultra-low back pressure technical transformation,the operating back pressure of the direct air-cooled unit can be reduced to 2-3 kPa,and the system operation is safe and stable.It can provide technical support for the unit to participate in deep peak shaving,improve the flexibility of unit operation and increase the heating capacity.It can also provide beneficial technical ways for the optimization of unit system operation energy saving and cold end system design optimization.

关 键 词：直接空冷机组 真空系统 超低背压 供热技术 灵活性 热电解耦 

分 类 号：TK264[动力工程及工程热物理—动力机械及工程]