LNG用截止閥超低溫實驗填料溫度影響因素分析

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中圖分類號：TH134；TB115.1 文獻(xiàn)標(biāo)志碼：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

隨著我國石油化工、低溫工程和液化氣體等產(chǎn)業(yè)的迅速發(fā)展，閥門行業(yè)迎來更廣闊的市場空間，尤其是低溫環(huán)境下的閥門及相關(guān)技術(shù)，更是整個閥門行業(yè)研究的重點[1-3] O

本文研究的超低溫截止閥主要應(yīng)用于輸送液化天然氣（簡稱LNG）。（剩余6509字）