论文部分内容阅读
为解决大型合成氨装置U型管高压废热锅炉爆管问题,在P=106×10~5Pa压力下试验了三种管内扰流子结构型式,对消除U型管沸腾传热恶化具有很好的效果.试验确定了三种扰流子型式的阻力特性,得出了单相阻力系数与雷诺数的关系特性,用Chisholm方程求得了两相流摩擦压降倍率与含汽率关系,建立了关联式.在水-空气试验台上进行了扰流子的流型观察试验,建立了流型图.试验得出单头扰流片阻力最小,结构简单,建议用于U型管废热锅炉消除传热恶化,以确保废热锅炉的安全运行.
In order to solve the pipe explosion problem of the U-tube high pressure waste heat boiler of a large-scale ammonia plant, three types of in-pipe spoiler structures were tested under the pressure of P = 106 × 10 ~ 5Pa, which has a good effect on eliminating the deterioration of the U- The drag characteristics of three kinds of turbulence type are determined and the relationship between single - phase drag coefficient and Reynolds number is obtained. The relationship between the frictional pressure drop ratio and the steam content of two - phase flow is obtained by Chisholm equation, The flow pattern of turbulent flow was observed on water - air test bench, and the flow pattern was established.It was found that the single head turbulent flow sheet had the least resistance and the simple structure, and it was suggested that it should be used in U - tube waste heat boiler to eliminate heat transfer Deterioration to ensure the safe operation of waste heat boilers.