CO_2长输管道设计的相关问题

Issues related to design of long-distance CO_2 pipeline

CO2在管道输送工况的温度、压力范围内会呈现出不同的相态,使得CO2输送管道不同于油气输送管道。为此,从CO2管道设计的角度出发,分析了CO2管道工艺系统的相关技术,包括CO2流的物理性质及相态、管道水力热力计算、站场工艺系统以及设备选取等。研究指出:相态控制是CO2管道设计的重要内容之一;CO2管道站场工艺系统设计应根据CO2的含水量考虑脱水工艺,而脱水工艺与CO2的压缩工艺相结合形成一个系统;CO2管道输送设备具有其特殊性,如压缩机、输送用泵、脱水装置、放空系统等,需要根据CO2管道的特点选取和设计。相关结论可为CO2长输管道的设计与建设提供参考。(图6,表1,参7)

CO2 pipelining will present different phases under different temperature and pressure of pipeline, which makes CO2 pipelines quite different from oil and gas pipelines. From a CO2 pipeline design point of view, this paper analyzes relevant techniques of CO2 pipeline system, including physical properties and phase of CO2 flow, pipeline hydraulic and thermal calculations, process system of the stations and the equipment selected, and so on. It is concluded from this study that phase control is an important part of the design of CO2 pipelines; the process system of pump stations for CO2 pipeline should incorporate dehydration process according to the water content of CO2, and the dehydration process and CO2 compression process should be combined to form a system; the transportation devices of CO2 pipeline, such as compressors, delivery pumps, dehydration units and venting systems, have its particularities, and should be selected and designed according to the characteristics of CO2 pipelines. The conclusions can provide a reference for the design and construction of long-distance CO2 pipelines. （6 Figures, 1 Table, 7 References）