高温热网系统氮气稳压及效果  

Nitrogen regulating and its effects in the heating network system

作　　者：王德明[1,2] 龙腾锐[1] 罗成[2] 丁德渝 

机构地区：[1]重庆大学城市建设与环境工程学院,重庆400045 [2]重庆电力高等专科学校动力工程系,重庆400053

出　　处：《西安建筑科技大学学报（自然科学版）》2012年第1期120-125,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：十五科技攻关基金资助项目(2004BA604A-01)

摘　　要：高温热网系统运行过程中常因补水不及时而发生热水锅炉汽化甚至爆管事故,系统的补水泵也常因补水频繁启动与停止而烧损其电机.针对这些问题,在热网系统中增设氮气稳压装置,以实现对高温热网系统较长时间的稳定补水和系统压力的相对稳定,避免其热水锅炉因缺水而发生汽化和爆管事故,以及避免系统补水泵因频繁启动和停止而烧损电机的现象.利用热力学理论对氮气稳压的原理进行了分析,论述了氮气在稳压过程中所经历的热力学状态和热力学过程,推导出了有无氮气稳压装置时热网系统补水周期之间的关系,得出了有氮气稳压的热网系统具有较长补水周期并能提高热网系统运行稳定性和安全性的结论.In the running of the high-temperature heating network system,the vaporization and tube rupture accident of the hot water boiler frequently occur without water replenishment in time,and the motor of the water replenishment pump is also burned out due to water replenishment with its starting and stopping.To solve these problems,an additional nitrogen regulating device is installed in the heating network system so as to achieve a longer time on the pressure stability of the system without the vaporization and tube rupture accident of the hot water boiler,and to void water replenishment pump motor burning out due to its frequent start and stops.According to thermodynamic theory,the working process of the nitrogen regulator is analyzed,and the thermodynamic state and processes of the regulating nitrogen in the device discussed.The water replenishment cycle relationship between the system with the regulating device and without regulating device is obtained,and that the system with nitrogen regulating device has longer water replenishment cycles and this can improve pressure stability and security.

关 键 词：热网系统 热力学分析 稳压 安全性 水泵 锅炉 

分 类 号：TU833[建筑科学—供热、供燃气、通风及空调工程]