会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 76. 发明公开
    • APPARATUS FOR PRODUCING HIGH-PURITY NITROGEN GAS.
    • 设备用于生产高纯度的氮气。
    • EP0191862A4
    • 1986-11-25
    • EP85903388
    • 1985-07-08
    • DAIDO OXYGEN
    • YOSINO AKIRA - NISIYAMADAI -CH
    • F25J3/00F25J3/04
    • F25J3/0426F25J3/04254F25J3/044F25J3/04824F25J2200/74F25J2210/42F25J2250/20F25J2290/62Y10S62/913
    • An apparatus for producing nitrogen gas of a super-high purity by subjecting air to supercooling, liquefaction and separation. It is an object of this invention to obtain an apparatus for producing nitrogen gas of a super-high purity, which does not require an expensive expansion turbine which frequently malfunctions. The apparatus according to the present invention is formed by connecting a liquid nitrogen storage means (23) via an introduction passage (24a) to a tower portion (22) of a fractionating tower (15) which consists of a dephlegmeter portion (21) containing a condenser (21a), and the tower portion (22) of an intermediate pressure. The compressed air of a supercooled temperature introduced into the tower portion (22) of an intermediate pressure of the fractionating tower (15) via an air-compressing means (9) and heat exchange means (13), (14) is further cooled by the heat loss of evaporating, circulating liquid nitrogen obtained at the dephlegmeter portion (21) and liquid nitrogen supplied from the liquid nitrogen storage means (23). The nitrogen is recovered in the form of a gas at an intermediate pressure from the upper portion of the tower portion (22), and the oxygen is left in liquid form, by utilizing the difference in the boiling points thereof. The nitrogen gas at an intermediate pressure thus obtained is stored as the finished product, nitrogen gas.