LNG用截止阀超低温实验填料温度影响因素分析

打开文本图片集

中图分类号：TH134；TB115.1 文献标志码：B

Analysis of factors influencing packing temperature in cryogenic test of shut-off valves for LNG

FAN Chengyu'，LIU Yang2，TENG Yuanyuan2， ZHANG Gaoyuan

（1. Shanghai Hudong Shipbuilding Valve Co.，Ltd.，Shanghai 201913，China； 2.Logistic Engineering College，Shanghai Maritime University，Shanghai 2O13O6，China）

Abstract： To ensure the safety and reliability of the liquefied natural gas（LNG） system，ultra-low temperature shut-off valves must have excellnt low-temperature resistance under extreme working conditions ）. A temperature field experiment is conducted on the ultra-low temperature shutoff valve DN15，collcting temperature data from the packing gland of 235 ultra-low temperature shut-off valves.After processng，the temperature field is verified for normal distribution.The results show that the temperature field of the packing part conforms to the normal distribution law. The factors that may affect the temperature in the experiment are parameterized，and the temperature at the packing gland part is calculated under the influence of three parameters：convective heat transfer coeffcient，nitrogen layer height，and nitrogen layer temperature. A probability distribution map of the packing temperature is also generated.

Key Words：LNG shut-off valve； ultra-low temperature experiment； packing temperature； parametricanalysis ； nitrogen

0引言

随着我国石油化工、低温工程和液化气体等产业的迅速发展，阀门行业迎来更广阔的市场空间，尤其是低温环境下的阀门及相关技术，更是整个阀门行业研究的重点[1-3] O

本文研究的超低温截止阀主要应用于输送液化天然气（简称LNG）。（剩余6509字）