沥青管道导热油伴热温降计算.pdf

第44卷第2期
当代化工
Vo1.44,NO.2
2015年2月
Contemporary Chemica l Industry
February, 2015
沥青管道导热油伴热温降计算
王盛智,蓝晓民,王国维1
(1.辽宁石油化工大学石油与天然气工程学院,辽宁抚顺113001;2.辽宁石油化工大学机械学院,辽宁抚顺113001)
摘要:针对生产的实际需要,为检验用于沥青管道加热的导热油能否以不低于规定温度返回到导热油锅
炉处,对导热油通过各段不同形式的管路所产生的温降进行了计算。通过对现有学术论文及参考文献进行研究,
得到输油管道导热油伴热的温降计算公式,对公式中的相关系数给出算法,得出导热油伴热后返回锅炉的最终
温度,通过和规定温度对比,得出符合要求的结论
关键词:导热油;管道;伴热;温降
中图分类号:TQ018
文献标识码:A
文章編号:1671-0460(2015)02-0421-02
Calculation of Temperature Drop of Heat
Conduction Oil for Asphalt Pipelines Heat Tracing
WANG Sheng-zhi LAN Xiao-min, WANG Guo-wei
(1. College of Petroleum Engineering, Liaoning Shihua University, Liaoning Fushun 113001, China;
2. College of Mechanical Engineering, Liaoning Shihua University, Liaoning Fushun 113001, China)
Abstract: Aimed at the actual production needs, in order to test if heat conduction oil for asphalt pipeline he
tracing
can return to the heat conduction oil boiler under no less than set temperature, temperature drop of the heat conduction
oil through different segments of the pipeline was calculated. Based on existing academic papers and research
reference, calculation formula of temperature drop of heat conduction oil for asphalt pipeline heat tracing was obtained
correlation al orithm for coefficients of the formula was put forward, final temperature of heat conduction oil returning
to the boiler was calculated. Through comparing calculated result with specified temperature, it's proved that the final
Key words: Heat conduction oil; Pipeline; Heat tracing; Temperature drop
本论文为解决工程实际问题,导热油经锅炉加
kuD(T、-Z0)
热,对沥青管道进行夹套伴热,直到码头,然后通过
πx0.1582×(180+0.1)=89.51w/m
回油管返回到锅炉房并保证回油温度不低于160℃。
导热油流稈示意图
出口温度为180℃,流速为0.98mk,通过DN250的
管道进行输送600m后到达需进行伴热的沥青管线,
导热油回油管
采用夹套管的方式进行伴热,在夹套管管道外做80
锅炉房
mm硅酸盐保温,从进人夹套管至码头前约长1935
码头
m,其中夹套管为沥青伴热管线长1382m,管道采用
导热油伴热管
DN350,其余553m为连接管路,采用DN100管道进
图1导热油流程示意图
行跨接,管道外做50mm硅酸盐保温,从码头前沿回
Fig 1 Schematic diagram of the heat conducting oil flow
到锅炉房管线共2500m,管道为DN200,管道外做其中:q-热损失,wm
50mm硅酸盐保温。流程见图1。
k一传热系数
计算导热油到夹套管时的温度
D1、D2管道的内径和外径,D1-0.257m,D2=-0.273m
D3一管道与保温层形成的结构外径,D3=0.273+0.160=0.433m
D-计算外径,取保温层内外直径的平均值;
A一导热系数,取入=0.037W/(m℃);
a1 D 2] D2 a D3
T一油的初始温度,℃;
收稿日期:2014-09-15
作者介:王盛智(1963-),女,置宁抚顺人,副教授,1985年毕业于西安公路学院工程力学专业,研究方向:油气储运设备强度。E-mail
5241329549@163.Cm