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中亚天然气管道部分管段因地形复杂、管道高低差距较大,扫水后管道弯头和低洼处存留少量残余水,必须对管道进行干燥。对比了干空气干燥和真空干燥两种方法的工艺要求和施工工期,结果表明:由于干燥工期主要取决于管道试压后管道内的残余水量、泡沫清管器的使用效果、空压机的排量和最终露点要求,综合考虑中亚天然气管道的干燥要求、施工工期以及投入使用效果,最终选择使用受外界因素影响小且干燥效果较好的干空气干燥法。中亚天然气管道的干空气干燥设备包括空压机、干燥器、露点仪、发球筒、收球筒及快开盲板等,基于此给出了现场施工设备的安装和施工步骤。
Due to the complex topography of the Central Asian natural gas pipeline, there is a big gap between the pipelines and the pipelines. After the water is swept, a small amount of residual water remains in the pipe elbows and low-lying areas, and the pipelines must be dried. The technical requirements and construction period of two methods of dry air drying and vacuum drying were compared. The results show that the dry period mainly depends on the amount of residual water in pipeline after pressure test, the effect of foam pig, Volume and final dew point requirements, taking into account the Central Asian natural gas pipeline drying requirements, construction period and put into use effect, the final choice to use the external factors and the drying effect of small dry air drying method is better. The dry air drying equipment of Central Asia natural gas pipeline includes air compressor, dryer, dew point meter, teeing cylinder, closing spout and quick opening blind plate. Based on this, the installation and construction steps of on-site construction equipment are given.