公开(公告)号：US5638699A

公开(公告)日：1997-06-17

申请号：US685624

申请日：1996-07-24

申请人： Takao Yamamoto ,  Shingo Koizumi

发明人： Takao Yamamoto ,  Shingo Koizumi

IPC分类号： F25J3/04

CPC分类号： F25J3/044 ,  F25J3/04163 ,  F25J3/04169 ,  F25J3/04254 ,  F25J3/0426 ,  F25J3/04836 ,  F25J2200/72 ,  F25J2205/82 ,  F25J2210/42 ,  F25J2215/44 ,  F25J2245/42 ,  F25J2245/90 ,  F25J2250/42 ,  F25J2290/62 ,  Y10S62/913

摘要： A high purity nitrogen gas generator is provided which can be rapidly returned to a stable state when boil-off gas is generated in a liquid nitrogen storage tank 10. The high purity nitrogen gas generator includes a liquid nitrogen storage tank 10, a rectification column 7, a liquid nitrogen introduction pipe P15 for supplying liquid nitrogen from the liquid nitrogen storage tank to the rectification column, an inverted U-type pipe P13 whose upper end is positioned at a height in the vicinity of the top portion of said liquid nitrogen storage tank connected to the bottom portion of said liquid nitrogen storage tank 10, said liquid nitrogen storage tank 10 and said liquid nitrogen introduction pipe P15 being connected with each other by way of said inverted U-type pipe, the upper end of the inverted U-type pipe and the top portion of said liquid nitrogen storage tank are connected with each other by means of a pipe P17 and a control valve V3 provided on the way of said pipe P17.

摘要翻译： 提供了一种高纯度氮气发生器，其在液氮储存罐10中产生蒸发气体时能迅速恢复到稳定状态。高纯度氮气发生器包括液氮储存罐10，精馏塔7 用于从液氮罐向精馏塔供给液氮的液氮导入管P15，其上端位于液氮罐顶部附近的高度的倒U型管P13 连接到所述液氮储存罐10的底部，所述液氮储存罐10和所述液氮引入管P15通过所述倒U型管连接，所述倒U型管的上端 管道和所述液氮储罐的顶部通过管道P17和设置在所述管道P17的路上的控制阀V3相互连接。