番禺-惠州海底天然气管道真空干燥工艺  

Vacuum-drying technique applied in Panyu-Huizhou Submarine Gas Pipeline

作　　者：康一龙 张人公 赖俊丞 张添龙[2] 

机构地区：[1]海洋石油工程股份有限公司,天津300451 [2]新疆油田油气储运公司,新疆克拉玛依834000

出　　处：《油气储运》2011年第3期173-176,3-4,共4页Oil & Gas Storage and Transportation

摘　　要：鉴于番禺30-1气田外输海底天然气管道具有长距离、大口径的特点,预调试施工时选用真空干燥工艺对其进行干燥。对影响真空干燥时间的管道长度、管道内径、泵的名义抽速以及水膜厚度4个因素进行分析,并提出优化方法。在泵的优化方面,需考量经济、施工进度、风险控制等方面因素,最终确定泵的型号。水膜厚度的优化方法是采用空气干燥机制造干燥空气作为排水球的推动气体,空气越干燥,排水效果越好;考虑空压机功率范围和排水清管球接收器的接收能力,在排水时尽可能多地安放空气球,并控制球速。通过番禺-惠州海底天然气管道真空干燥工艺实践表明:干燥时间预测的正确性,可为同类型管道的干燥作业借鉴。Because the submarine gas pipeline in Panyue 30-1 Gasfield is characterized by a long distance and large diameter,therefore vacuum drying technique is chosen as the method to dry the pipeline in pre-commissioning stage. Four factors that will impact the vacuum drying time in pipe length,pipe diameter,nominated suction speed of pump and thickness of water film are analyzed and an optimization method is presented. For the pump optimization,the cost,construction progress,risk and other factors need to be considered before the determination of the pump. Water film thickness optimization adopts the dried air produced by drying machine as the propulsion medium for the spill sphere. The more desiccated the medium is,the better the effect will be. Considering power range of compressors and the capacity of the spill sphere trap,more empty spheres should be arranged and the travelling speed of the spheres should be limited. The vacuum drying practice shows the correctness of the drying prediction time and the existed experience will be a good reference for the similar projects in submarine vacuum drying technique.

关 键 词：天然气管道 海底 真空干燥 干燥时间 工艺 优化 

分 类 号：TE832[石油与天然气工程—油气储运工程]