作者：王伟¹, 员晓辉², 毛海东³, 李贺松³

作者单位：1. 天津中德应用技术大学机械工程学院, 天津 300350;
2. 天津绿州能源装备有限公司, 天津 300384;
3. 新地能源工程技术有限公司, 河北 廊坊 065001

关键词：分子筛再生气;热流质温度场;管系传热计算;流体模拟

摘要：

在液化天然气脱水工艺中，分子筛再生气复热时高温介质导致管线系统温度升高，为研究热流质管道温度场对管线支路的影响，通过对热流质管道温度场及传热的分析，采取管系传热计算和内部介质模型的流体模拟，得到优化设计前后天然气再生气温度场及控制阀法兰处虚拟工况的温度，分析仿真流场达到稳态后的结果，通过这些结果对比现场的实测参数，进行优化管线设计，从而可以得出现场各种优化方案。该文结合天津滨海天然气液化项目的天然气再生气流场、温度场进行模拟和分析，作出合理配管设计。同时通过此次对比研究不同散热模型的热流质温度场分析，整理出系统性的计算分析方法，得出基于现场条件直管系增加翅片为散热优化推荐结构。

Design of regeneration gas pipeline of molecular sieve tower based on hot fluid temperature field analysis of blind pipeline
WANG Wei¹, YUN Xiaohui², MAO Haidong³, LI Hesong³
1. School of Mechanical Engineering, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China;
2. Tianjin Lvzhou Energy Equipment Co., Ltd., Tianjin 300384, China;
3. XINDI Energy Engineering Technology Co., Ltd., Langfang 065001, China
Abstract: In the liquefied natural gas dehydration process, during the reheating of the molecular sieve regeneration gas, the high-temperature medium causes the temperature of the pipeline system to rise. In order to study the effect of the temperature field of the hot fluid pipeline on the branch of the pipeline, the temperature field and heat transfer process of the hot fluid pipeline are analyzed. The calculation of the heat transfer process in piping system and the fluid simulation of the internal medium model are adopted to obtain the temperature field of the regeneration gas of natural gas and the temperature of the virtual working condition at the valve flange before and after the optimization design. Meanwhile, the result of simulated flow field is analyzed when it reaches steady state. By comparing these results with the on-site parameters, this paper optimizes the pipeline design to obtain various optimization on-site schemes. In this paper, the flow field and temperature field of regeneration gas of natural gas of Tianjin Binhai Natural Gas Liquefaction Project are simulated and analyzed to make a reasonable piping design. Through this comparative study of the thermal fluid temperature field analysis of different heat dissipation models, a systematic calculation and analysis method is sorted out. Meanwhile, based on the field conditions, it is recommended to add fins to the straight pipe system to optimize the structure for heat dissipation.
Keywords: molecular sieve regeneration gas;hot fluid temperature field;heat transfer calculation of the piping system;fluid simulation
2020, 46(5):94-99  收稿日期: 2019-11-12;收到修改稿日期: 2020-02-23
基金项目:
作者简介: 王伟(1972-),女,山东青岛市人,副教授,硕士,主要研究方向为机械设计与制造、CAD/CAE/CAPP/CAM
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