南方LNG低温管道保冷层厚度计算的分析

目前在中国南方地区远离天然气长输管线的县城,几乎全部都采用投资建设LNG(液化天然气)气化站,然后通过LNG槽车把LNG运送到LNG气化站,然后经气化后经管道输送到各燃气用户。由于LNG是低温储藏,因此在气化前LNG低温管道需要进行保冷设计。保冷厚度的大小对工艺管道的正常运行起到重要的作用。通过对几种保冷层厚度计算方法的分析,并通过举例说明,对LNG低温管道保冷层厚度的计算方法进行阐述。

Analysis on the Calculation of Thickness of South LNG Cryogenic Pipeline Cold Reserving Layer

At present, almost all of the counties far away from long-distance gas pipeline in southern China invest in constructing LNG （liquefied natural gas） gasification station, then transport LNG to the LNG gasification station with LNG tankers, and then transport LNG to each user after gasification by pipe. Because LNG is stored in low temperature, the LNG cryogenic pipelines need cold reserving design before gasification. The thickness of the cold reserving layer plays an important role in the normal operation of the process pipeline. Based on the analysis of several methods of calculating the thickness of cold reserving layer and explanation with examples, the methods of calculating the thickness of LNG cryogenic pipeline cold reserving layer are analyzed.