超临界压力下浸没燃烧式气化器工程设计方法  

Engineering design method of submerged combustion vaporizer under supercritical pressure

作　　者：于鲲鹏 银建中[1] YU Kunpeng;YIN Jianzhong(School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学化工学院,辽宁大连116024

出　　处：《应用科技》2022年第1期73-77,89,共6页Applied Science and Technology

基　　金：国家重点研发计划项目(2020YFA0710202).

摘　　要：针对浸没燃烧式气化器(SCV)传热计算中存在的管内液化天然气进出口温差大、物性变化剧烈、管外气液两相流传热的特点,建立了一种基于管长分段的计算模型并与实际工况校核验证了模型的准确性。选取5种管内传热模型对正在运行SCV进行设计验证,最大负荷下的计算面积裕度为10.99%~17.78%,满足设计裕度的要求,其中选用管内Jackson模型、管外ZuKauskas模型的计算结果最为保守。清洁状态下的SCV气化器具有比考虑污垢热阻的设计状态下更好的传热效率,清洁状态下的出口温度可达到287.5 K,满足最低出口温度的要求。该传热模型的应用可为SCV的设计与传热分析提供理论参考。In view of the large temperature difference between inlet and outlet of tube fluid and the drastic change of physical properties in submerged combustion vaporizer(SCV)heat transfer calculation,and the gas-liquid two-phase heat transfer outside tube,a calculation model based on tube length section was established and the accuracy of the model was verified with the actual working conditions.Five inside-tube heat transfer models were selected to check the running SCV operation,and the calculated area margin range under the maximum load was 10.99%-17.78%,which met the design margin requirements.Among them,the Jackson model inside tube and Zukauskas model outside tube were the most conservative.The SCV under clean condition has a better heat transfer efficiency than the design condition considering fouling thermal resistance.The outlet temperature under clean condition can reach 287.5 K,which meets the minimum outlet temperature requirement.The application of the heat transfer model can provide theoretical reference for SCV design and heat transfer analysis.

关 键 词：浸没燃烧式气化器 超临界压力 液化天然气 传热面积 传热系数 传热模型 数值计算 工程设计 

分 类 号：TK172[动力工程及工程热物理—热能工程]