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    NITROGEN GENERATING METHOD AND APPARATUS FOR USE IN THE SAME
    1.
    发明授权
    NITROGEN GENERATING METHOD AND APPARATUS FOR USE IN THE SAME 有权

    公开(公告)号：EP1903290B1

    公开(公告)日：2018-08-01

    申请号：EP06766791.5

    申请日：2006-06-16

    申请人： Air Water Inc.

    发明人： YOSHINO, Akira ,  TANAKA, Koji ,  MATSUBAYASHI, Ryosuke ,  SUENAGA, Junya ,  OKUMURA, Shinya

    IPC分类号： F25J3/04 ,  C01B21/04

    CPC分类号： F25J3/04181 ,  F25J3/04157 ,  F25J3/0423 ,  F25J3/04254 ,  F25J3/04412 ,  F25J3/04824 ,  F25J2200/90 ,  F25J2205/70 ,  F25J2210/42 ,  F25J2210/50 ,  F25J2215/50 ,  F25J2290/62

    摘要： There is provided a method of generating nitrogen which includes cryogenically separating compressed air introduced into a high-pressure column 11, storing liquid air 13 in a bottom portion of the high-pressure column 11 and taking nitrogen in gaseous form from an upper portion of the high-pressure column 11, introducing the liquid air 13 stored in the bottom portion of the high-pressure column 11 into a low-pressure column 12, cryogenically separating the liquid air 13 introduced into the low-pressure column 12, storing oxygen-enriched liquid air 22 in a bottom portion of the low-pressure column 12 and taking nitrogen in gaseous form from an upper portion of the low-pressure column 12 as a product gas, introducing the nitrogen taken from the upper portion of the high-pressure column 11 into a condenser 16 to liquefy the nitrogen, refluxing part of the liquid nitrogen to the high-pressure column 11, feeding the remainder of the liquid nitrogen to the upper portion of the low-pressure column 12, and introducing liquid nitrogen or liquid oxygen from outside a system into the low-pressure column as a coolant, wherein the liquid air 13 taken through an extraction pipe 20 is introduced into a portion of a rectification part 12a of the low-pressure column 12 in which the number of theoretical plates from a column bottom side is set within the range of one to ten. This method significantly reduces the amount of raw material air to accomplish significant reductions in power consumption, the amount of coolant and costs of facilities.

    Process for nitrogen liquefaction by recovering the cold derived from liquid methane gasification
    8.
    发明公开
    Process for nitrogen liquefaction by recovering the cold derived from liquid methane gasification 有权
    通过利用从液体甲烷汽化冷氮气液化的方法

    公开(公告)号：EP1469265A1

    公开(公告)日：2004-10-20

    申请号：EP04007031.0

    申请日：2004-03-24

    申请人： SIAD MACCHINE IMPIANTI S.p.a.

    发明人： Bigi, Emanuele ,  Bigi, Alessandro

    IPC分类号： F25J1/02 ,  F17C9/04 ,  F25J3/04

    CPC分类号： F25J1/0204 ,  F25J1/0015 ,  F25J1/005 ,  F25J1/0072 ,  F25J1/0222 ,  F25J1/0234 ,  F25J1/0292 ,  F25J1/0297 ,  F25J3/0406 ,  F25J3/04254 ,  F25J3/04351 ,  F25J2210/62 ,  F25J2230/08 ,  F25J2230/30 ,  F25J2230/42

    摘要： This process for nitrogen liquefaction by recovering the cold derived from liquid methane gasification has the characteristic of cooling with the liquid methane (1) a cryogenic fluid (5), preferably nitrogen, and then using said cryogenic fluid as coolant fluid (9,10) in two nitrogen compressor units of the nitrogen liquefier, both for the interstage coolers (11,12,13,27,28,29,30,31,32) and for the intake coolers (27) and for the final delivery coolers (19,32) of one of the nitrogen compressor unit.
    The use of nitrogen cooled by the methane enables liquid nitrogen to be produced (3) in a liquefier consisting of the two said compressor units and a cryogenic turbine (17), with a very low specific energy consumption.

    摘要翻译： 这通过回收来自液体甲烷气化得到的冷过程为氮气液化具有与所述液体冷却甲烷（1）将低温流体（5），优选地为氮，然后使用所述低温流体作为冷却剂流体的特性（9,10） 中的氮液化器的两个氮压缩机单元，无论对于间冷却器（11,12,13,27,28,29,30,31,32），并用于进气冷却器（27）和用于最终传送冷却器（19 ，32）中的氮压缩机单元中的一个的。 使用由甲烷冷却氮的使要生产液氮（3）在一个液化器由两个所述压缩机单元和低温涡轮（17），具有非常低的比能量消耗。