公开(公告)号：JP2013064077A

公开(公告)日：2013-04-11

申请号：JP2011204123

申请日：2011-09-20

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

Inventor： NATE MASATO ,  SUENAGA JUNYA

IPC: C10L3/10 ,  F25J3/02

CPC classification number: F25J3/0209 ,  F25J3/0233 ,  F25J3/0238 ,  F25J2200/02 ,  F25J2200/40 ,  F25J2200/70 ,  F25J2240/40 ,  F25J2270/04

Abstract: PROBLEM TO BE SOLVED: To provide a method for separating a high-pressure natural gas, which can stably feed methane used for a fuel and the like, and other components in a natural gas used for raw materials for petrochemical plants to onsite places where these are consumed; and to provide a separation apparatus used therefor.SOLUTION: The separation apparatus has: a fractionating column 10 using a high-pressure natural gas or a city gas in a gas pipe line as a raw material, accumulating high-boiling point components in the raw material gas in the lower part thereof in a liquid state, and accumulating a methane-rich gas in the upper part thereof, by the cryogenic separation; a heat exchanger 2 cooling the raw material gas; a reboiler 1 cooling the raw material gas having passed through the heat exchanger 2; a raw material gas expanding means (raw material gas expanding valve 3) adiabatically expanding the raw material gas having passed through the reboiler 1; a first product gas flow path M making the methane-rich gas in the fractionating column upper part pass through the heat exchanger 2 and leading it outside as a first product gas; and a second product gas flow path E making the high-boiling point components in the fractionating column lower part pass through the heat exchanger 2 and leading it outside as a second product gas.

Abstract translation: 要解决的问题：提供一种能够将用于燃料等的甲烷稳定供给到用于石油化工厂原料的天然气中的其他成分的高压天然气分离到现场的方法 消费的地方; 并提供用于其的分离装置。 解决方案：分离装置具有：使用高压天然气或气体管线中的城市气体作为原料的分馏塔10，在下部的原料气体中积聚高沸点成分 并通过低温分离在其上部积聚富含甲烷的气体; 冷却原料气体的热交换器2; 再沸器1冷却已经通过热交换器2的原料气体; 将通过再沸器1的原料气体绝热膨胀的原料气体膨胀装置（原料气体膨胀阀3） 使分馏塔上部的富甲烷气体的第一产物气体流路M通过热交换器2并将其作为第一产物气体引导到外部; 并且使分馏塔下部的高沸点成分的第二产物气体流路E通过热交换器2，并将其作为第二产物气体引导到外部。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2013036676A

公开(公告)日：2013-02-21

申请号：JP2011172997

申请日：2011-08-08

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

Inventor： SUENAGA JUNYA ,  NATE MASATO

IPC: F25J3/08 ,  C10L3/10

CPC classification number: F25J3/0209 ,  F25J3/0233 ,  F25J3/0257 ,  F25J2200/02 ,  F25J2200/76 ,  F25J2210/04 ,  F25J2210/90 ,  F25J2230/30 ,  F25J2245/42

Abstract: PROBLEM TO BE SOLVED: To provide a method for removing nitrogen from a boil off-gas that can stably removes nitrogen from a boil off-gas that is generated from a liquefied natural gas (LNG) tank and the like even if a nitrogen concentration in the boil off gas varies, and to provide a nitrogen removing apparatus for use with the same.SOLUTION: The apparatus for removing nitrogen from a boil off gas (BOG) includes: a nitrogen gas recycling flow path R for reducing a part of a nitrogen gas that is extracted from a fractionation column 10 through a nitrogen gas extraction flow path T as the reflux liquid of the fractionation column 10 by circulating through a recycle nitrogen gas compressor 5, a main heat exchanger 2, a supercooling device 6 and the like; and a nitrogen gas mixing flow path M for adding and mixing the other part of the nitrogen gas that is extracted from the fractionation column 10 to and with the BOG gas that is extracted from an LNG tank through a mixer 8 and the like for the adjustment of the nitrogen concentration of the BOG gas.

Abstract translation: 要解决的问题：提供一种从可从液化天然气（LNG）罐等产生的沸腾废气中稳定地除去氮气的沸腾废气中除去氮的方法，即使 沸腾气体中的氮浓度变化，并且提供与其一起使用的除氮装置。 解决方案：用于从沸腾气体（BOG）除去氮气的装置包括：氮气再循环流路R，用于通过氮气提取流路减少从分馏塔10中提取的一部分氮气 T通过循环氮气压缩机5，主热交换器2，过冷却装置6等循环通过分馏塔10的回流液体; 以及氮气混合流路M，用于将从分馏塔10中提取的氮气的另一部分与通过混合器8等从LNG罐中取出的BOG气体混合并进行调节， 的BOG气体的氮浓度。 版权所有（C）2013，JPO＆INPIT