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LNG动力船舶储罐选型设计及稳压过程

201912-2812:47:03

随着近年来气作为燃料的推广和普及,用于LNG储运的设备了广泛应用。LNG储运设备首先可分为固定式和移动式两种,固定式主要为LNG接收站的大型储槽,容积一般在万方以上;移动式LNG储罐容积一般在千方以下,包括当前的LNG槽车、车船用LNG储罐等。从外部结构来看,LNG储罐可以分为球型和圆筒形两种,球形容器单位体积的表面积小,受力性能好,但缺点是生产加工过程难度较大;圆筒形储罐容易成型,加工方便并且有较好的结构尺寸,但只适用于操作压力不高的场合,而LNG目前大多采用低温常压储存,因此圆筒形储罐普及率广泛。LNG储罐有多种不同的绝热结构,常见的有正压堆积、真空粉末和高真空多层绝热三种形式,其中高真空多层绝热效果,但山于高真空实现困难,目前多用于中小型储罐,对于大型储罐一般多采用真空粉末绝热。此外,LNG储罐双层壳之间还需要安装良好的的支撑结构,以防止使用过程中的冲击和震动对储罐造成破坏。

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