作　　者： ; ; ;

机构地区： 华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室

出　　处： 《天然气工业》 2006年第5期130-132,共3页

摘　　要： 管道天然气的长途输送一般都采用高压管输的方式,高压天然气经各地的调压站降压后才能供应给普通用户使用,调压过程中会有大量的压力能损失。为解决城市燃气用户特有的用气不均匀性问题,介绍了一种利用高压天然气调压过程的压力能膨胀制冷的管道天然气液化流程。应用该流程可以将管道里的一部分天然气液化制成LNG并储存起来,在用气高峰时将储存的LNG再汽化以增加供气量,满足下游用户的需求。这样能够增强燃气企业的“调峰”能力,有利于天然气管网的平稳运行。同时,利用该流程还可以回收天然气中的轻烃资源,为石化工业提供优质的化工原料。 Natural gas is normally compressed at high pressure so that it can be transported over long distance. From the transmission natural gas network to gas customers' appliances, the pressure is decreased by pressure regulating stations. It will produce cryogenic energy when the high-pressure gas is expanded to a lower pressure at a pressure-regulating station. A new pipeline gas liquefaction technology by using the cryogenic energy was put forward to balance the unstable consumption of city gas users. By applying this new process flow, a proportion of pipeline gas can be liquefied as LNG and then stored. When gas supply fall short of demand, the stored LNG can then be gasified as a peak shaving tool to increase the pipeline gas deliverability aiming at meeting the demand of downstream users. So it can enhance the peak-shaving ability of gas enterprises and benefit the stabilized operation of natural gas pipeline network. In addition, C_2+ light hydrocarbons contained in natural gas can also be recovered as a kind of qualified raw chemical material for petrochemical enterprises.

关 键 词： 城市 燃气 调峰 调压站 天然气 液化 液化天然气 汽化 轻烃回收 原料

领　　域： [石油与天然气工程] [石油与天然气工程]