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    • 1. 发明授权
    • Method and device for obtaining oxygen and nitrogen at superatmospheric
pressure
    • 用于在超大气压下获得氧气和氮气的方法和装置
    • US5749246A
    • 1998-05-12
    • US756012
    • 1996-11-25
    • Dietrich Rottmann
    • Dietrich Rottmann
    • F25J3/04
    • F25J3/04915F25J3/0409F25J3/04103F25J3/04212F25J3/04321F25J3/04363F25J3/04424F25J3/04678F25J3/04878F25J2235/50
    • The method and the apparatus are used to obtain oxygen and nitrogen at superatmospheric pressure by low-temperature separation of air in a rectification column system. Compressed and purified feed air (1, 3) is introduced into a pressure column (4). Liquids (5, 8) from the lower region and, respectively, from the upper or middle region of the pressure column (4) are fed into the low-pressure column (7). A third liquid fraction (17) from the lower region of the low-pressure column (7) is evaporated in indirect heat exchange (12) with condensing vapour (11) from the upper region of the pressure column (4), at least a portion of the vapour (22, 24, 26, 27) obtained in the process being introduced into the low-pressure column (7). Condensate (13) is fed into the pressure column (4); A pressurized nitrogen fraction (10, 14, 15) is extracted as product from the upper region of the pressure column (4). The pressure of the third liquid fraction (17) from the lower region of the low-pressure column (17) is increased upstream of the indirect heat exchange (12); that portion (24) of the vapor which is obtained during the indirect heat exchange and led back into the low-pressure column is expanded (25) before being introduced (27) into the low-pressure column (7).
    • 该方法和装置用于通过精馏塔系统中的空气的低温分离而在超大气压下获得氧和氮。 将压缩和净化的进料空气(1,3)引入压力塔(4)中。 来自下部区域和分别来自压力塔(4)的上部或中部区域的液体(5,8)被供给到低压塔(7)中。 来自低压塔(7)的下部区域的第三液体馏分(17)在与压力塔(4)的上部区域的冷凝蒸气(11)的间接热交换(12)中蒸发,至少 在该方法中获得的部分蒸汽(22,24,26,27)被引入低压塔(7)中。 冷凝物(13)进料到压力塔(4)中; 从压力塔(4)的上部区域提取加压氮气馏分(10,14,15)作为产物。 来自低压塔(17)的下部区域的第三液体馏分(17)的压力在间接热交换(12)的上游增加; 在间接热交换期间获得并引导回低压塔的蒸汽的部分(24)在引入(27)之前被膨胀(25)到低压塔(7)中。
    • 4. 发明授权
    • Single column process and apparatus for producing oxygen at
above-atmospheric pressure
    • 用于在高于大气压下生产氧气的单柱方法和装置
    • US5363657A
    • 1994-11-15
    • US60144
    • 1993-05-13
    • Joseph P. Naumovitz
    • Joseph P. Naumovitz
    • F25J3/04F25J3/02
    • F25J3/044F25J3/04066F25J3/0423F25J3/04309F25J3/04363F25J2200/74
    • A process and apparatus for separating air in which a refrigerant stream produced at the top of a single column is expanded with the performance of work. Such expansion can be carried out in an expansion machine coupled to a recycle compressor by an energy dissipative brake. An oxygen stream is removed from a bottom region of the column and a compressor compresses an oxygen stream to column pressure which is at an above atmospheric delivery pressure. After compression, the oxygen stream is divided into two partial streams. One of the two partial streams is fed back into a bottom region of the column as a vapor to provide boil up while the other of the two partial streams is taken as a product which having been derrived from the compressed stream is therefore at the above-atmospheric delivery pressure. The refrigerant stream is heat exchanged countercurrently with incoming air to be separated in order to add refrigeration.
    • 一种用于分离空气的方法和装置,其中在单柱顶部产生的制冷剂流随着工作的进行而膨胀。 这种膨胀可以在通过能量耗散制动器连接到再循环压缩机的膨胀机中进行。 从柱的底部区域除去氧气流,并且压缩机将氧气流压缩至高于大气输送压力的塔压力。 压缩后,将氧气流分成两部分流。 两个部分流中的一个作为蒸汽被反馈到塔的底部区域以提供沸腾,而两个部分流中的另一个被认为是从压缩流排出的产物因此处于上述状态, 大气输送压力。 制冷剂流与要分离的进入空气逆流热交换,以增加制冷。
    • 10. 发明授权
    • High purity nitrogen generator unit and method
    • 高纯氮发生器单元及方法
    • US5806340A
    • 1998-09-15
    • US856003
    • 1997-05-14
    • Shinji Tomita
    • Shinji Tomita
    • F25J3/04
    • F25J3/04333F25J3/04048F25J3/04066F25J3/04084F25J3/04103F25J3/04206F25J3/04321F25J3/04363F25J3/0443F25J2200/94F25J2205/02F25J2210/04F25J2215/44F25J2220/42F25J2230/52F25J2245/02F25J2250/02F25J2250/20F25J2250/30F25J2250/40F25J2250/42F25J2250/50
    • A high purity nitrogen generator unit which is excellent in the energy efficiency and the recovery of high purity nitrogen gas, is provided. In a rectification column 1, feed air is separated to oxygen-rich liquid air and nitrogen gas. The oxygen-rich liquid air in its bottom is reduced in pressure by a first expansion valve 21 and sent to a composition regulation column 3. The nitrogen gas in its top is condensed in a nitrogen condenser 2, the resulting liquid nitrogen is returned as a reflux liquid to the rectification column 1 and non-condensed gas is released. After oxygen-rich waste gas in the lower part of the composition regulation column 3 is reduced in pressure by an expansion turbine 6, it is released by way of a first heat exchanger 4. Mixed gas in the top of the composition regulation column 3 is introduced for re-circulation into a first compressor 5. Another portion of the mixed gas is returned to the composition regulation column 3 by way of a second compressor 7, second heat exchanger 8 and second expansion valve 22. The second compressor 7 is driven by means of the expansion turbine 6. High purity liquid nitrogen taken out of the vicinity of the top of the rectification column 1 is evaporated for recovery in the second heat exchanger 8.
    • 提供了能量效率优异和高纯度氮气回收的高纯度氮气发生器单元。 在精馏塔1中,将进料空气分离成富氧液体空气和氮气。 其底部的富氧液体空气通过第一膨胀阀21减压,并送到组成调节塔3.其顶部的氮气在氮冷凝器2中冷凝,得到的液氮作为 回流液到精馏塔1,非冷凝气体被释放。 在组成调节塔3的下部的富氧废气通过膨胀涡轮6减压后,通过第一热交换器4释放。组成调节塔3顶部的混合气体为 引入再循环到第一压缩机5中。另一部分混合气体通过第二压缩机7,第二热交换器8和第二膨胀阀22返回到组成调节塔3中。第二压缩机7由 膨胀涡轮机6的装置。从精馏塔1顶部附近取出的高纯度液氮在第二热交换器8中蒸发回收。