燃煤电厂高温高压疏水管道爆管原因及优化策略  

Analysis and Optimization of Burst of HT and HP Drainage Pipeline in Coal-fired Power Plant

作　　者：张中林 ZHANG Zhong-lin(School of Energy and Power Engineering,Nanjing Institute of Technology)

机构地区：[1]南京工程学院能源与动力工程学院

出　　处：《电站系统工程》2022年第6期48-51,54,共5页Power System Engineering

摘　　要：以两种不同类型的高温高压疏水管道爆管为研究对象,研究发现汽水混合物的长期冲刷和局部黏性耗散过热是造成疏水管道爆管的主要原因。在此基础上,建立了一种利用疏水管道金属壁温计算管道内漏流的模型,解决了疏水管道内漏流量无法直接测量的问题。同时,提出了一种利用缩放型喷嘴降低疏水管道流速的方法,解决了疏水管道在极端情况下因流速过快而爆管的难题。Taking two different types of high temperature and high pressure drainage pipe burst as the research object, it is found that the long-term scouring of steam water mixture and local viscous dissipation overheating are the main reasons for the pipe burst of drainage pipeline. On this basis, a model for calculating the leakage flow in the drain pipe by using the metal wall temperature of the drain pipe is established, which solves the problem that the leakage flow in the drain pipe can not be measured directly. At the same time, a method of reducing the flow rate of drainage pipeline by using zoom nozzle is proposed, which solves the problem of pipe explosion due to too fast flow rate in extreme cases.

关 键 词：高温高压 疏水 爆管 燃煤电厂 缩放喷嘴 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]