大流量低压降管壳式换热器设计及优化

Design and optimization of shell and tube heat exchangers under massive flow and low pressure drop

在大流量、低压降气体工况下,管壳式换热器易发生换热管振动。以俄罗斯某天然气处理厂脱水装置单元的再生气换热器为例,应用ASPEN EDR软件对E,F,G,J,X型换热器进行设计对比和经济性分析,得出X型换热器设计简单、制造难度低、抗振性能好、可利用低翅片管增强换热效率、造价相对低、综合性能最优的结论。总结出大流量、低压降气体工况下,管壳式换热器的设计及优化流程:对换热器进行振动消除后得到满足工艺要求的设计方案;对比各待选方案的设计参数后,优化各方案自身结构;根据压降余量判断是否采取换热管增强措施;结合ASPEN EDR造价和制造难度分析来选择最合适的设计方案。

Under the gas process condition of massive flow and low pressure drop,the tube vibration of the heat exchanger tube is prone to occur.By taking the regeneration gas heat exchanger of dehydration unit in a Russian natural gas processing plant as an example,Aspen EDR software was used to carry out design comparison and economic analysis of type E,F,G,J and X heat exchangers,the results show that X-type heat exchanger has the advantages of simple design,low manufacturing difficulty,good anti-vibration performance,enhancement of the heat exchange efficiency using low-fin tubes,relatively low cost and optimal comprehensive performance.It is concluded that the design and optimization process of shell and tube heat exchangers under the gas process condition of massive flow and low pressure drop is as follows:the design plan that meets the process requirement after eliminating the tube vibration can be obtained;the structure of each plan itself can be optimized after comparing the design parameters of each candidate plan;whether to take heat exchanger tube enhancement measures can be determined according to the pressure drop allowance;the most appropriate design plan can be selected based on the ASPEN EDR cost analysis and manufacturing difficulty.