低温丙烷储罐预冷过程的比较与分析  

Comparison and Analysis of Pre-Cooling Process of Cryogenic Propane StorageTanks

作　　者：唐艳 Tang Yan(China Chengda Engineering Co.,Ltd.Chengdu 610041,China)

机构地区：[1]中国成达工程有限公司,四川成都610041

出　　处：《化工设计》2024年第3期34-38,1,2,共7页Chemical Engineering Design

摘　　要：基于低温丙烷储罐相同的预冷方案和预冷速度要求,对比了两台低温丙烷储罐在预冷过程中内罐底、内罐壁和环形空间的降温差异,分析了受预冷介质流量、预冷介质减压闪蒸后相态成分、储罐基础沉降、环形空间绝热材料填充等多种因素影响。管道的清洁度影响预冷介质流量;介质流量的大小直接影响预冷速度和预冷时间;储罐基础沉降直接影响内罐底的水平度,使罐底出现积液的位置不同;环形空间绝热材料填充的均匀度直接影响环形空间底部温度。这些因素使得两台低温丙烷储罐在预冷过程产生差异。本文为类似大型低温储罐稳定预冷操作提供借鉴。Based on the same pre-cooling scheme and pre-cooling speed requirements for cryogenic propane storage tanks,the cooling differences between the inner tank bottom,inner tank wall and annular space of two cryogenic propane storage tanks during the pre-cooling process are compared.The effects of various factors such as pre-cooling medium flow rate,phase composition of pre-cooling medium after vacuum flash evaporation,tank foundation settlement and filling of insulation materials in the annular space are analyzed.The cleanliness of the pipeline affects the pre-cooling medium flow rate,and the magnitude of the medium flow rate directly affects the pre-cooling speed and pre-cooling time.The setlement of the tank foundation directly affects the levelness of the inner tank bottom,causing different positions of liquid accumulation at the tank bottom.The uniformity of the insulation material filling in the annular space directly affects the temperature at the bottom of the annular space.These factors cause differences in the pre-cooling process between the two cryogenic propane storage tanks.This paper provides reference for stable pre-cooling operation of similar large cryogenic storage tanks.

关 键 词：预冷方案 预冷速度比较 预冷差异分析 

分 类 号：TE8[石油与天然气工程—油气储运工程]