堵塞沉积对波形板汽水分离器运行特性的影响规律及机理  

Influence rule and mechanism of clogging deposition on the performance characteristic of a wave-type separator

作　　者：买丹婕 赵富龙 刘庆祝 田瑞峰[1,2] 谭思超 MAI Danjie;ZHAO Fulong;LIU Qingzhu;TIAN Ruifeng;TAN Sichao(College of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China;Heilongjiang Provincial Key Laboratory of Nuclear Power System&Equipment,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学核科学与技术学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学黑龙江省核动力装置性能与设备重点实验室,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2024年第5期982-988,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(12305176)。

摘　　要：在核电厂装置运行的热态工况下,波形板汽水分离器内高温高压且湿度较大,易出现腐蚀现象,产生沉积物并影响汽水分离性能。为研究沉积堵塞现象对波形板汽水分离器运行特性的影响机理,本文运用CFD软件对不同堵塞程度的波形板建立了经过合理简化的二维模型,在不同热态工况下对波形板分离器开展数值计算与分析,得到了堵塞程度对波形板运行特性的影响规律和作用机理。结果表明:堵塞沉积的波形板压降和分离效率随工况的变化趋势均与未堵塞时较为相似;沉积物使实际流通截面变小,从而使波形板的压降增大,且压降增幅随堵塞程度增大而增大;沉积物明显影响了液滴的碰撞分离过程,使分离效率降低;在疏水钩未失效前,波形板分离效率的降幅随堵塞程度增大而增大;在压降、效率增幅方面,沉积物在低流速工况下的影响程度更大。研究结果为波形板的沉积堵塞研究及其运行和设计提供了一定的理论支撑和科学依据。In the hot state of nuclear power plant operation,high temperature,high pressure,and high humidity make wave-type separators prone to corrosion,with sediment affecting the performance of separation.Herein,CFD software is used to establish a reasonably simplified two-dimensional model of corrugated plates with different bloc-king degrees,and numerical calculation and analysis are conducted on the corrugated plate separator under different thermal conditions,obtaining the influence law and mechanism of the blocking degree on the operating characteris-tics of corrugated plates.Results show that the pressure drop and separation efficiency of the clogging wave-type separator changing with work conditions are similar to those without blockage.The sediment decreases the actual flow section,which increases the pressure drop of the corrugated plate.The growth margin of the pressure drop in-creases with the increase in clogging degree.Sediment affects the collision-separation process of droplets,which re-duces the separation efficiency.Before the failure of trap hooks,the decrease in separation efficiency of the corru-gated plate increases with the increase in clogging degree.In terms of pressure drop and efficiency increase,the sediment has a greater influence under low-velocity conditions.This study provides theoretical support and scientific basis for the study of clogging of wave-type separators and their operation and design.

关 键 词：波形板汽水分离器 堵塞沉积 分离效率 汽水分离 运行特性 

分 类 号：TK223.4[动力工程及工程热物理—动力机械及工程]