高压热交换器防冲挡板结构优化
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摘要
为解决高压热交换器内的防冲挡板防冲能力弱、易脱落等问题,设计了一种高压热交换器双层防冲挡板结构。通过建立高压热交换器防冲挡板结构的物理模型,分别对高压热交换器双层防冲挡板结构、圆孔型防冲挡板结构、圆弧型防冲挡板结构进行数值计算,比较3种不同防冲挡板的防冲能力及对换热管的保护作用。研究结果表明,高压热交换器双层防冲挡板和圆弧型防冲挡板相比于圆孔型防冲挡板,能够更好地保护换热管;当水蒸气以相同速度流入3种不同防冲挡板结构时,双层防冲挡板中心速度均值为1.393 3 m/s,远低于圆孔型防冲挡板的2.283 0 m/s与圆弧型防冲挡板的2.651 6 m/s,因此其防脱落效果也更好。高压热交换器双层防冲挡板结构具有很好的防冲能力,能更好地保护换热管,有效工作时间更长,无需频繁更换。
In order to solve the problems such as weak anti-impingement ability and easy shedding of impingement plate in high pressure heat exchanger,a double-layer impingement plate structure of high pressure heat exchanger is designed. By establishing the physical model of the impingement plate structure,double-layer impingement plate structure of high pressure heat exchanger,circular hole type impingement plate structure and arc type impingement plate structure were calculated numerically. The anti-impingement ability of three different impingement plate and the protective effects of heat exchanger were compared. The results show that the double-layer impingement plate of high pressure heat exchanger and the arc type impingement plate provides better protection for the heat exchanger tubes compared with the circular hole impingement plate. When the water vapor flows into three different impingement plate structures at the same speed,the average central velocity of the double-layer impingement plate of high-pressure heat exchanger is 1.393 3 m/s,which is much lower than that of the circular hole type(2.283 0 m/s)and the arc type(2.651 6 m/s)with better anti-shedding effect. The double-layer impingement plate structure of high pressure heat exchanger advantages in good anti-punching ability,provides better protection for the heat exchanger.
In order to solve the problems such as weak anti-impingement ability and easy shedding of impingement plate in high pressure heat exchanger,a double-layer impingement plate structure of high pressure heat exchanger is designed. By establishing the physical model of the impingement plate structure,double-layer impingement plate structure of high pressure heat exchanger,circular hole type impingement plate structure and arc type impingement plate structure were calculated numerically. The anti-impingement ability of three different impingement plate and the protective effects of heat exchanger were compared. The results show that the double-layer impingement plate of high pressure heat exchanger and the arc type impingement plate provides better protection for the heat exchanger tubes compared with the circular hole impingement plate. When the water vapor flows into three different impingement plate structures at the same speed,the average central velocity of the double-layer impingement plate of high-pressure heat exchanger is 1.393 3 m/s,which is much lower than that of the circular hole type(2.283 0 m/s)and the arc type(2.651 6 m/s)with better anti-shedding effect. The double-layer impingement plate structure of high pressure heat exchanger advantages in good anti-punching ability,provides better protection for the heat exchanger.
引文
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[3] 梁佳,刘金才.高压加氢裂化装置高压热交换器腐蚀分析及防护[J].石油化工设备,2018,47(3):62-69. LIANG J,LIU J C. Corrosion analysis and protection of high pressure heat exchangers in the high pressure hydrocracking unit[J].Petro-chemical equipment,2018,47(3):62-69.
[4] 邵海磊.换热器传热管流致振动碰磨分析与试验研究[D].郑州:郑州大学,2016.SHAO H L. Research on fretting wear and experimental of heat transfer tube under the fluid induced vibration[D].Zhengzhou:Zhengzhou University,2016.
[5] JI J,Ge P,BI W B. Numerical analysis on shell-side flow induced vibration responses of multi-row elastic tube bundles in heat exchanger[J]. Journal of vibration & shock,2016,35(20):85-89.
[6] Bao M,Wang L,Li W,et al. The vibration analysis of tube bundles induced by fluid elastic excitation in shell side of heat exchanger[J].Materials science and engineering,2017, 239(1): 012011.
[7] JI J,Ge P,BI W B. Numerical analysis of shell-side flow-induced vibration of elastic tube bundle in heat exchanger[J].Journal of hydrodynamics,2018,30(2):249-257.
[8] 白宇,宋冲.换热器防冲板脱落的原因分析和改进[J].黑龙江科技信息,2015(1):52.BAI Y,SONG C. Cause analysis and improvement of shedding of heat exchanger anti-punching baffle[J]. Heilongjiang science and technology information,2015(1):52.
[9] Taher,FarhadNemati. Baffle space impact on the performance of helical baffle shell and tube heat exchangers[J]. Applied thermal engineering,2012,44:143-149.
[10] 赵金星.换热器防冲板脱落的原因分析和改进[J].管道技术与设备,2006(2):44-46.ZHAO J X. Cause analysis and improvement of shedding of heat exchanger anti-punching baffle[J]. Pipeline technique and equipment,2006(2):44-46.
[11] 刘月芹.浅谈换热器防冲板[J].化工设备与管道,2002,39(5):20-21.LIU Y Q. Brief statement of impingement plate in heat exchanger[J]. Process equipment and piping,2002,39(5):20-21.
[12] 刘相斌,王玉,常阳,等.单管程热交换器管箱防冲板结构的模拟与分析[J].化工设备与管道,2016,53(4):41-43.LIU X B,WANG Y,CHANG Y,et al. Simulation and analysis of impingement plate in tube channel in one tube side heat exchanger[J]. Process equipment & piping,2016,53(4):41-43.
[13] 刘晓玲.管壳式换热器壳程入口防冲板设置的振动分析[J].聚酯工业,2015,28(3) :1-4.LIU X L. Flow-induced vibration analysis on the shell side entrance impingement plate setting of shell and tube heat exchanger[J]. Polyester industry,2015,28(3) :1-4.
[14] 钟晓峰.钛制换热器防冲板结构:CN202109813U[P].2011-06-23.ZHONG X F. Anti-punching baffle structure of titanium heat exchanger:CN202109813U[P].2011-06-23.
[15] 吴洋宽,韩东,蒲文灏,等.用于换热器的弧形防冲板及换热器及工作方法:CN106959039A[P].2017-07-18.WU Y K,HAN D,PU W H,et al. The arc type anti-punching baffle and heat exchanger and its working method for heat exchanger:CN106959039A[P].2017-07-18.
[16] 纪兵兵,张晓霞,古艳.ANSYS ICEM CFD基础教程与实例详解[M].北京:机械工业出版社,2015.JI B B,ZHANG X X,GU Y. ANSYS ICEM CFD basic courses and examples[M].Beijing:China Machine Press,2015.
[17] 段中喆.ANSYS FLUENT流体分析与工程实例[M].北京:电子工业出版社,2015. DUAN Z Z. ANSYS FLUENT fluid analysis and engineering examples[M].Beijing:Electronic Industry Press,2015.
[18] 段振亚,李帅,赵国相,等.半径比对气液喷射器吸气量的影响研究[J].石油化工设备,2018,47(6):9-15.DUAN Z Y,LI S,ZHAO G X,et al. Influence of radius ratio on suction volume of gas-liquid ejector[J].Petro-chemical equipment,2018,47(6):9-15.