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    Temperature control method for reversing type heat exchanger group of air separation system
    1.
    发明授权
    Temperature control method for reversing type heat exchanger group of air separation system 失效
    空气分离系统换向换热器组的温度控制方法

    公开(公告)号：US4459143A

    公开(公告)日：1984-07-10

    申请号：US451960

    申请日：1982-12-21

    申请人： Makoto Nawata ,  Norio Nakazato ,  Sachihiro Yoshimatsu ,  Youichi Itou ,  Kengo Sugiyama ,  Yasuo Tasaka

    发明人： Makoto Nawata ,  Norio Nakazato ,  Sachihiro Yoshimatsu ,  Youichi Itou ,  Kengo Sugiyama ,  Yasuo Tasaka

    IPC分类号： F28F27/02 ,  F25J3/04 ,  F25J5/00 ,  F28F27/00

    CPC分类号： F25J5/00 ,  F28F27/00 ,  F25J2210/40 ,  F25J2280/02

    摘要： A temperature control method for a reversing type heat exchanger group wherein an outlet temperature of reheating gas of an arbitrarily selected reversing type heat exchanger which serves as a reference in the reversing heat exchanger group is rendered equal in value to a reference control temperature set beforehand in such a manner so as to satisfy the sweeping temperature difference. The outlet temperatures of the reheating gas in the other reversing type heat exchangers of the reversing type heat exchanger group are rendered equal in value to the outlet temperature of the reheating gas in the reversing type heat exchanger serving as the reference. Thus, the temperature of the cold end of all of the reversing type heat exchangers of the reversing type heat exchanger group are caused to be balanced equally whereby ice and dry ice deposited on the feed water channels can be effectively removed by a sweeping action.

    摘要翻译： 用于反转型热交换器组的温度控制方法，其中在换向换热器组中作为基准的任意选择的换向换热器的再加热气体的出口温度与预先设定的参考控制温度相等 以满足扫描温度差的方式。 反转型热交换器组的其他换向型热交换器中的再加热气体的出口温度与作为基准的换向型热交换器中的再加热气体的出口温度相等。 因此，使逆变型热交换器组的所有反向型热交换器的冷端的温度平衡地平衡，从而可以通过扫掠动作有效地去除沉积在给水通道上的冰和干冰。

    Air separation method and apparatus therefor
    2.
    发明授权
    Air separation method and apparatus therefor 失效
    空气分离方法及其设备

    公开(公告)号：US4530708A

    公开(公告)日：1985-07-23

    申请号：US494448

    申请日：1983-05-13

    申请人： Norio Nakazato ,  Sachihiro Yoshimatsu ,  Makoto Nawata ,  Sadao Masuda

    发明人： Norio Nakazato ,  Sachihiro Yoshimatsu ,  Makoto Nawata ,  Sadao Masuda

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04054 ,  F25J3/0423 ,  F25J3/04309 ,  F25J3/04321 ,  F25J3/04393 ,  F25J3/044 ,  F25J2200/50 ,  F25J2200/74 ,  F25J2205/02 ,  F25J2240/42

    摘要： This invention relates to an air separation method and apparatus for liquefying and separating feed air into oxygen and nitrogen by use of a single rectification column. The temperature of the feed air, which is liquefied, is reduced to the temperature necessary for the condensation and liquefaction of pure vaporous nitrogen inside the single rectification column and is used to condense and liquefy the pure vaporous nitrogen and vaporize the feed air. After the pressure of the feed air thus vaporized is raised to the pressure necessary for the condensation and liquefaction of the pure vaporous nitrogen inside the single rectification column, the vaporized feed air is introduced into the single rectification column so that pure gaseous nitrogen can be withdrawn from the top of the single rectification column, pure gaseous oxygen from a lower portion of the column and waste gas rich in nitrogen from an intermediate portion of the column. Thus, the present invention makes it possible to carry out air separation with a high rate of recovery of oxygen using a single rectification column.

    摘要翻译： 本发明涉及一种使用单一精馏塔将进料空气液化并分离成氧和氮的空气分离方法和装置。 液化的进料空气的温度降低到单一精馏塔内纯净蒸气氮冷凝和液化所需的温度，用于冷凝和液化纯蒸气氮并蒸发进料空气。 在这样蒸发的进料空气的压力升高到单一精馏塔内的纯净氮气冷凝和液化所需的压力之前，蒸发的进料空气被引入单一精馏塔，以便可以抽出纯的气态氮 从单个精馏塔的顶部，来自塔的下部的纯气体氧和来自塔的中间部分的富氮的废气。 因此，本发明可以使用单一的精馏塔以高氧回收率进行空气分离。

    Process of and system for liquefying air to separate its component
    3.
    发明授权
    Process of and system for liquefying air to separate its component 失效
    用于液化空气以分离其组分的方法和系统

    公开(公告)号：US4208199A

    公开(公告)日：1980-06-17

    申请号：US951974

    申请日：1978-10-16

    申请人： Norio Nakazato ,  Norihide Saho ,  Sachihiro Yoshimatsu ,  Michimasa Okabe

    发明人： Norio Nakazato ,  Norihide Saho ,  Sachihiro Yoshimatsu ,  Michimasa Okabe

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04878 ,  F25J3/04303 ,  F25J3/04424 ,  F25J3/04872 ,  F25J2290/10

    摘要： In a process of and a system for liquefying air to separate its components employing a so-called compound fractionating column, the system includes a fractionating medium pressure column into which a part of feed air is introduced to flow therethrough as an upwardly flowing gas for contact with a returning liquid, so as to obtain nitrogen gas at the top thereof and change the returning liquid to liquefied air as it reaches the bottom thereof, a first condenser adapted for a heat exchange between a liquefied air of a reduced pressure, which has been obtained by allowing an expansion of the liquefied air available at the bottom of the medium pressure column, and the nitrogen gas obtained at the top of the medium pressure column, so as to liquefy the nitrogen gas to make use of it as the returning liquid for the medium pressure column, a second condenser adapted for a heat exchange between the remainder part of feed air and liquefied oxygen to evaporate the oxygen, and a fractionating low pressure column through which the evaporated oxygen is made to flow as an upwardly flowing gas adapted to be contacted by a returning liquid coming down from the top of the low pressure column for a fractionation, whereby an impure gas is obtained at the top of the low pressure column, while the returning liquid is changed to liquefied oxygen as it reaches the bottom of the low pressure column.

    摘要翻译： 在使用所谓的化合物分馏塔分离其组分的过程和用于液化空气的系统的过程中，该系统包括分馏中压塔，一部分进料空气被引入其中，作为向上流动的气体用于接触 返回液体，以便在其顶部获得氮气，并且当返回液体到达其底部时将返回液体改变为液化空气，第一冷凝器适于在已经被减压的液化空气之间进行热交换 通过允许在中压塔底部可获得的液化气体的膨胀和在中压塔顶部获得的氮气而膨胀，以使氮气液化以利用其作为返回液体 中压塔，第二冷凝器，适于在进料空气的剩余部分和液化氧之间进行热交换以蒸发氧气，以及分馏低 使蒸发的氧气通过该压力塔作为向上流动的气体流动，该气体适于与从低压塔的顶部下来的回流液体接触，以进行分馏，由此在低温的顶部获得不纯的气体 压力塔，同时返回的液体在达到低压塔的底部时变为液化的氧气。