输汽管道复合式保温及热力参数分布规律  

Distribution of Composite Insulation and Thermal Parametersof Steam Pipelines

作　　者：丁自富 张炳茂 张新敏 DING Zi-fu;ZHANG Bing-mao;ZHANG Xin-min(Sinopec Petroleum Engineering Zhongyuan Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]中石化中原石油工程设计有限公司,河南郑州450000

出　　处：《节能技术》2024年第4期382-384,I0001,I0002,共5页Energy Conservation Technology

摘　　要：采用技术先进、经济适用的材料和保温结构并开展热力参数对输汽管道蒸汽品质的影响规律研究,是实现稠油高效开采的重要环节。本文针对复合保温中的硬质结构联立求解动量方程和能量方程、建立了输汽管道热力参数计算模型,求解沿程蒸汽干度、温度、焓值等热力参数。结果表明:复合保温结构相对于原保温,管道千米干度提高3.3%、焓值提高50 kJ/kg;提高输汽管道输汽量可以减少沿程焓降、提高末端蒸汽干度,输汽量16 t/h时干度降为3%、焓降38 kJ/kg,相对于8 t/h时输汽量干度提高2.5%、焓值提高39 kJ/kg。输汽管道蒸汽入口焓值随着锅炉压力的提高而降低,降低锅炉出口输汽管道压力可以提高蒸汽焓值、提高末端蒸汽干度,7 MPa时干度降为2%、14 MPa时干度降为4%。The use of technologically advanced and economically applicable materials and insulation structures,as well as the study of the influence of thermal parameters on the steam quality of steam pipelines,is an important link in achieving efficient heavy oil extraction.This article focuses on solving the momentum equation and energy equation for the hard structure in composite insulation,establishing a thermal parameter calculation model for steam pipelines,and solving the thermal parameters such as steam dryness,temperature,and enthalpy along the way.The results show that compared to the original insulation,the composite insulation structure increases the pipeline dryness by 3.3%per kilometer and the enthalpy value by 50 kJ/kg;Increasing the steam flow rate in the steam pipeline can reduce the enthalpy drop along the way and improve the end steam dryness.When the steam flow rate is 16 t/h,the dryness decreases to 3%and the enthalpy drops by 38 kJ/kg.Compared to when the steam flow rate is 8 t/h,the dryness increases by 2.5%and the enthalpy value increases by 39 kJ/kg.The enthalpy value at the steam inlet of the steam transmission pipeline decreases with the increase of boiler pressure.Reducing the pressure of the steam transmission pipeline at the outlet of the boiler can increase the enthalpy value and increase the end steam dryness.The dryness decreases to 2%at 7 MPa and 4%at 14 MPa.

关 键 词：稠油热采 输汽管道 复合式保温 干度 焓值 

分 类 号：TK480.50[动力工程及工程热物理—动力机械及工程]