埋地保温管道和非保温管道停输温降规律对比研究  

Comparative study on law of temperature drop during shutdown process between buried insulated pipeline and non-insulated pipeline

作　　者：聂超飞[1] 兰浩[1] 范华平 闫锋[1] 李其抚[1] 刁宇[1] 

机构地区：[1]中国石油管道科技研究中心,河北廊坊065000 [2]北京油气调控中心,北京100083

出　　处：《石油工程建设》2018年第1期19-22,共4页Petroleum Engineering Construction

摘　　要：针对非保温、新建保温和在役多年保温三种保温效果差异性较大的热油管道,通过数值模拟,对比研究了其在停输过程中油温的变化规律和热力性能差异。结果表明:对于管段首端,停输时间较短时非保温管道的停输温降速率和温降幅度要大于保温管道,但随着停输时间延长,非保温管道的停输温降速率逐渐变小,同时非保温管道的停输油温开始高于保温效果较差管道的油温;对于管段末端,停输过程中非保温管道油温始终低于保温管道,但非保温管道停输温降速率总体要小于保温管道。针对不同管段保温效果不同的管道模拟也表明:非保温管道的降温速率并不一定是最快的。因此,在生产运行管理中,要注意保温管道与非保温管道在停输过程中的热力差异性,结合仿真模拟科学决策,杜绝简单惯性思维。The change law of oil temperature and thermal difference during the shutdown process was studied comparatively by numerical simulation for the buried non-insulated pipeline, newly-built insulated pipeline and insulated pipeline servicing for many years. The results showed that for the front part of the pipeline, the temperature drop rate and amplitude of the non-insulated pipeline during the shutdown process were higher than that of the insulated pipeline if the shutdown time was short; But with the shutdown time extended, the temperature drop rate of the non-insulated pipeline was gradually reduced and the temperature was higher than that of the pipeline with poor insulation effect; For the end part of the pipeline, the oil temperature of the non-insulated pipeline was always lower than that of the insulated pipeline during the shutdown process and the temperature drop rate of the non-insulated pipeline was generally less than that of the insulated pipeline. Therefore, in the process of operation and management, we should pay attention to the thermal difference between the non-insulated pipeline and the insulated pipeline during the shutdown process and make scientific decisions with simulation results, putting an end to the simple inertia thinking.

关 键 词：保温管道 非保温管道 停输 温降 

分 类 号：TE973[石油与天然气工程—石油机械设备]