公开(公告)号：JP2012144628A

公开(公告)日：2012-08-02

申请号：JP2011003511

申请日：2011-01-12

Applicant: Air Water Inc ,  エア・ウォーター株式会社

Inventor： OKUMURA SHINYA ,  YASUDA TAKAHIKO

IPC: C10L3/10 ,  B01D53/04

Abstract: PROBLEM TO BE SOLVED: To provide a method for removing nitrogen in gas essentially composed of methane which removes nitrogen in a gas essentially composed of methane, and achieves the efficiency improvement of reliquefaction.SOLUTION: The method for removing nitrogen from gas essentially composed of methane is achieved by implementing: an adsorption stage of preparing three or more adsorption columns filled with adsorbent adsorbing and separating nitrogen and making the adsorbent adsorb nitrogen in a state where pressurizing is performed to prescribed adsorption pressure; a reproduction stage of desorbing nitrogen from the adsorbent in a state where pressure is more reduced than the above adsorption pressure so as to be reproduced; and a pressure recovery stage of reverting the adsorption column in the pressure-reduced state to the adsorption pressure in parallel by the respective adsorption columns. In the meantime, in the respective adsorption columns, the respective stages are implemented by being changed-over in succession. A recovery operation of introducing the gas discharged from the adsorption column in the pressure reduction step upon transfer from the adsorption stage to the reproduction stage, into the adsorption column in the pressure reverting stage, is implemented. In the recovery operation, a first step of recovering the gas of relatively high pressure after the adsorption and a second step of recovering the subsequent relatively low pressure gas thereafter are implemented.

Abstract translation: 要解决的问题：提供一种除去主要由甲烷组成的气体中的氮气的方法，其除去基本上由甲烷组成的气体中的氮气，并且实现再液化的效率提高。 解决方案：通过实施以下方式实现了从基本上由甲烷组成的气体中除氮的方法：制备三个或更多个填充吸附和分离氮气的吸附塔的吸附阶段，并使吸附剂在加压状态下吸附氮气 执行规定的吸附压力; 在压力比上述吸附压力更低的状态下从吸附剂中脱氮以便再现的再生阶段; 以及通过各吸附塔平行地将减压状态的吸附塔还原为吸附压力的压力恢复阶段。 同时，在相应的吸附塔中，通过连续地转换来实现各个阶段。 实现了在从吸附阶段到再生阶段转移到压力还原阶段的吸附塔中时，将从吸附塔排出的气体引入减压步骤的回收操作。 在回收操作中，实现了在吸附之后回收相对较高压力的气体的第一步骤，以及随后回收随后的相对低压气体的第二步骤。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2007003097A

公开(公告)日：2007-01-11

申请号：JP2005183898

申请日：2005-06-23

Applicant: Air Water Inc ,  エア・ウォーター株式会社

Inventor： YOSHINO AKIRA ,  TANAKA KOJI ,  MATSUBAYASHI RYOSUKE ,  SUENAGA JUNYA ,  OKUMURA SHINYA

IPC: F25J3/04 ,  C01B21/04

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

Abstract: PROBLEM TO BE SOLVED: To provide a nitrogen generating method capable of substantially reducing power consumption, amount of cold and equipment costs by substantially reducing amount of material air.
SOLUTION: The compressed air introduced into a high-pressure tower 11 is cryogenically separated so that liquid air 13 is stored at a bottom portion, nitrogen is taken out from an upper portion in a gas state, the liquid air 13 at the bottom portion of the high-pressure tower 11 is introduced to a low-pressure tower 12, the liquid air 13 introduced into the low-pressure tower 12 is cryogenically separated so that oxygen-enriched liquid air 22 is stored at the bottom portion, nitrogen is taken out from the upper portion as a product gas in a gas state, nitrogen taken out from the upper portion of the high-pressure tower 11 is introduced into a condenser 16 to be liquefied, a part of the liquid nitrogen is refluxed to the high-pressure tower 11, the residual is supplied to the upper portion of the low-pressure tower 12, and the liquid nitrogen or liquid oxygen as cold is introduced into the low-pressure tower from the outside of a system. The liquid air 13 taken out by a taking-out pipe 20 is introduced from a part having the number of theoretical stages within a range of 1-10 stages from a tower bottom portion side in a rectifying portion 12a of the low-pressure tower 12.
COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供一种能够通过大幅减少材料空气量而大大降低功耗，冷量和设备成本的氮气发生方法。 解决方案：引入高压塔11的压缩空气被低温分离，使得液体空气13储存在底部，氮气以气体状态从上部取出，液体空气13在 将高压塔11的底部引入低压塔12，引入低压塔12的液体空气13被低温分离，使得富氧液体空气22储存在底部，氮 作为气体状态的产物气体从上部取出，从高压塔11的上部取出的氮气被引入冷凝器16中以液化，一部分液氮回流到 高压塔11将剩余物供给到低压塔12的上部，冷却的液氮或液氧从系统的外部被引入低压塔。 由取出管20取出的液体空气13从低压塔12的整流部12a的塔底部侧的理论级数为1〜10级的部分导入 。版权所有（C）2007，JPO＆INPIT