真空隔热油管隔热性能失效机理分析

本文对真空隔热油管的隔热性能主要影响因素及失效机理进行了分析,并提出了改善隔热性能与延长使用寿命的解决思路。保证隔热层具有一定的真空度是维持隔热油管隔热性能的核心,氢气渗透、管材气体脱附、油管机械破坏等因素都会使得隔热层真空度下降,减弱隔热性能。氢气主要来源于钢材的析氢腐蚀和原油裂解等。本文根据对隔热性能主要影响因素的分析提出了一些解决思路,以期减缓其隔热性能下降速度,延长隔热油管使用寿命,提高稠油热采的热效率和经济性

Novel methods by using non-vacuum insulated tubing to extend the lifetime of the tubing

The analysis of the failure mechanics, namely hydrogen permeation of vacuum insulated tubing (VIT), indicated that the failure of VIT could be decreased but could not be avoided. To solve this problem, some measures by using non-vacuum materials were proposed and analyzed in this paper. The results show that to fill the tubing with foam-glass beads or high pressure argon may lead to a good performance

一种处理炼锡炉渣的新方法

采用三相交流工频等离子体冶炼含钽铌的炼锡炉渣，获得钽铌铁合金；再将钽铌铁合金经焙烧、酸煮、除钨、脱硅、水洗、烘干等工序，得到（Ta＋Nb）2O5品位达43．4％的中间产品。此工艺能简化从炼锡炉渣中提取钽铌的工序，提高钽铌品位和直收率，减少“三废”，利于环境治理，为更好地利用含钽铌的炼锡炉渣提供了新的途径

冶炼钨钼复合铁合金的新工艺

简单介绍了钨钼在合金钢中的使用情况,阐述了用三相交流工频等离子技术冶炼钨钼复合铁合金的机理及使用由钨精矿和钼精矿组成混合炉料直接制取钨钼复合铁合金的扩大量试验和分析结果。钨钼复合铁合金的Mo／W质量比为0．05～0．50，钨和钼的直收率高于90％，能满足冶炼合金钢的要求，为钨钼共生矿资源的利用，探索了新的冶炼工艺

非真空隔热油管研究进展

世界上原油储藏中稠油、特稠油和沥青油砂占到储量70%，稠油粘度极高，常温下往往凝结成固态，其开采和炼制技术难度和成本都很高，因而目前国际上普遍没有开采稠油油藏，特别是开采成本和难度最大的海上油田稠油油藏。我国由于原油资源不丰富，出于能源安全的考虑而大量开采稠油。因此，国际上可供借鉴的海上稠油开采经验几乎是空白，只有一些陆上稠油开采经验供参考

Numerical Simulation of the Thermal Conductivity of Thermal Insulation Pipe by Vacuum and High Pressure Argon Pre-filled

By analyzing the insulation effect of argon-filled tubing and vacuum-insulated tubing before and after hydrogen permeation respectively,a conclusion can be drawn that the insulated tubing filled with high pressure argon is better than the vacuum insulated tubing considering the lifetime and heat insulation effect.&nbsp;</span

Study of Thermal Conductivity of Hydrogen-argon Mixture at Different Temperatures for Thermal Insulation Pipes in Petroleum Industry

&nbsp;In this paper, through the study of thermal conductivity of hydrogen-argon mixture at different temperatures for thermal insulation pipes in petroleum industry, a good method for determining the thermal conductivity of other gas mixture at different temperatures has been provided.&nbsp;</span