JP3191161B2 - Cooling water cooling method and apparatus for air liquefaction / separation apparatus utilizing refrigeration of liquefied natural gas - Google Patents
Cooling water cooling method and apparatus for air liquefaction / separation apparatus utilizing refrigeration of liquefied natural gasInfo
- Publication number
- JP3191161B2 JP3191161B2 JP40899890A JP40899890A JP3191161B2 JP 3191161 B2 JP3191161 B2 JP 3191161B2 JP 40899890 A JP40899890 A JP 40899890A JP 40899890 A JP40899890 A JP 40899890A JP 3191161 B2 JP3191161 B2 JP 3191161B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- cooling water
- natural gas
- air
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04254—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using the cold stored in external cryogenic fluids
- F25J3/0426—The cryogenic component does not participate in the fractionation
- F25J3/04266—The cryogenic component does not participate in the fractionation and being liquefied hydrocarbons
- F25J3/04272—The cryogenic component does not participate in the fractionation and being liquefied hydrocarbons and comprising means for reducing the risk of pollution of hydrocarbons into the air fractionation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
- F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
- F25J3/0406—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of nitrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
- F25J3/04218—Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure cores
- F25J3/04224—Cores associated with a liquefaction or refrigeration cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/04351—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
- F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
- F25J2205/32—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as direct contact cooling tower to produce a cooled gas stream, e.g. direct contact after cooler [DCAC]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
- F25J2205/34—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as evaporative cooling tower to produce chilled water, e.g. evaporative water chiller [EWC]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/62—Liquefied natural gas [LNG]; Natural gas liquids [NGL]; Liquefied petroleum gas [LPG]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2270/00—Refrigeration techniques used
- F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
- F25J2270/904—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by liquid or gaseous cryogen in an open loop
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Separation By Low-Temperature Treatments (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、液化天然ガス(LN
G)の寒冷を利用した空気液化分離装置の冷却水冷却方
法及び装置に関する。BACKGROUND OF THE INVENTION The present invention relates to liquefied natural gas (LN).
The present invention relates to a method and an apparatus for cooling water of an air liquefaction / separation apparatus utilizing cold of G).
【0002】[0002]
【従来の技術】図3は、LNGの寒冷を利用した空気液
化分離装置の一例を示すものである。この空気液化分離
装置は、原料空気圧縮機1で昇圧した原料空気を水洗冷
却塔2で、例えばフロン冷凍機で得たチラー水と直接接
触させて5℃付近まで冷却した後、吸着器3で精製して
主熱交換器4で液化点付近まで冷却し、精留塔5に導入
して周知の液化精留分離を行い、液化酸素LO,液化窒
素LN,窒素ガスGN等を製品として採取するもので、
装置の運転に必要な寒冷を補給するために、LNGの寒
冷を利用する循環窒素系統6が設けられている。2. Description of the Related Art FIG. 3 shows an example of an air liquefaction / separation apparatus utilizing the cold of LNG. In this air liquefaction / separation apparatus, the raw material air pressurized by the raw material air compressor 1 is brought into direct contact with, for example, chiller water obtained by a CFC refrigerator in a washing cooling tower 2 and cooled to around 5 ° C. It is refined and cooled to near the liquefaction point in the main heat exchanger 4 and introduced into the rectification column 5 to perform a well-known liquefaction and rectification separation, and liquefied oxygen LO, liquefied nitrogen LN, nitrogen gas GN, etc. are collected as products. Things
In order to replenish the cold required for operation of the apparatus, a circulating nitrogen system 6 utilizing the cold of LNG is provided.
【0003】上記循環窒素系統6において、まず精留塔
下部塔上部から導管7により導出された窒素ガスは、そ
の一部が導管8から主熱交換器4に導入されて前記原料
空気の冷却源として使用され、次いで第一冷却器9で冷
却された後、窒素圧縮機の低圧段10に吸引される。ま
た導管7から導管11に分岐した窒素ガスは、過冷器1
2,第一熱交換器13,第二熱交換器14に順次導入さ
れた後、前記導管8に分岐した窒素ガスと合流して前記
窒素圧縮機の低圧段10に吸引される。[0003] In the circulating nitrogen system 6, first, a part of the nitrogen gas led out from the upper part of the lower tower of the rectification column by the conduit 7 is introduced into the main heat exchanger 4 through the conduit 8, and After being cooled by the first cooler 9, it is sucked into the low-pressure stage 10 of the nitrogen compressor. The nitrogen gas branched from the conduit 7 to the conduit 11 is supplied to the subcooler 1
2, after being sequentially introduced into the first heat exchanger 13 and the second heat exchanger 14, they are combined with the nitrogen gas branched into the conduit 8 and sucked into the low-pressure stage 10 of the nitrogen compressor.
【0004】上記窒素圧縮機の低圧段10で圧縮された
窒素ガスは、第二冷却器15で冷却された後、窒素圧縮
機の高圧段16でさらに高圧に圧縮される。高圧段16
で高圧となった窒素ガスの一部は、第二熱交換器14,
第一熱交換器13で冷却され、弁17を介して気液分離
器18内にフラッシュする。また、高圧の窒素ガスの残
部は、導管19から第一LNG熱交換器20に導入さ
れ、導管21からのLNGと熱交換して該LNGの寒冷
を回収した後、前記窒素ガスに合流して第一熱交換器1
3,弁17を介して気液分離器18内にフラッシュす
る。[0004] The nitrogen gas compressed in the low-pressure stage 10 of the nitrogen compressor is cooled in a second cooler 15 and then further compressed in a high-pressure stage 16 of the nitrogen compressor. High pressure stage 16
A portion of the nitrogen gas, which has become high pressure in the second heat exchanger 14,
Cooled by the first heat exchanger 13 and flushed into the gas-liquid separator 18 via the valve 17. The remainder of the high-pressure nitrogen gas is introduced into the first LNG heat exchanger 20 from the conduit 19, exchanges heat with the LNG from the conduit 21 to collect the cold of the LNG, and then joins the nitrogen gas. First heat exchanger 1
3. Flush into the gas-liquid separator 18 via the valve 17.
【0005】気液分離器18内の未凝縮の窒素ガスは、
導管22に導出されて前記第一熱交換器13,第二熱交
換器14に順次導入された後、前記窒素圧縮機の高圧段
16に吸引される窒素ガスに合流し、前記系統を循環す
る。一方、気液分離器18内の液化窒素は、導管23に
導出され、過冷器12を経た後、弁24で精留塔下部塔
の圧力まで膨張して、該塔上部に循環する。The uncondensed nitrogen gas in the gas-liquid separator 18 is
After being led out to the conduit 22 and sequentially introduced into the first heat exchanger 13 and the second heat exchanger 14, it joins the nitrogen gas sucked into the high-pressure stage 16 of the nitrogen compressor and circulates through the system. . On the other hand, the liquefied nitrogen in the gas-liquid separator 18 is led out to the conduit 23, passes through the subcooler 12, expands to the pressure of the lower column of the rectification column by the valve 24, and circulates to the upper portion of the column.
【0006】前記第一冷却器9及び第二冷却器15は、
適宜な冷媒、例えばフロンを使用した冷却回路を構成す
るもので、循環ポンプ25により循環する冷媒を第二L
NG熱交換器26でLNGと熱交換させて冷却し、該冷
媒を冷却源として前記第一冷却器9及び第二冷却器15
で窒素ガスを冷却するように構成されている。The first cooler 9 and the second cooler 15 are
A cooling circuit using an appropriate refrigerant, for example, Freon, is formed.
The NG heat exchanger 26 exchanges heat with LNG for cooling, and uses the refrigerant as a cooling source to cool the first cooler 9 and the second cooler 15.
To cool the nitrogen gas.
【0007】一方、液化天然ガス熱交換手段である前記
第一LNG熱交換器20及び第二LNG熱交換器26で
一部の寒冷を回収されて気化して導管27に導出された
天然ガスは、さらに大気,海水等により加温されて所定
の温度、圧力のガスとなって需要先に供給される。On the other hand, the first LNG heat exchanger 20 and the second LNG heat exchanger 26, which are liquefied natural gas heat exchange means ,
The natural gas that has been partially recovered from the cold and vaporized and led to the conduit 27 is further heated by the atmosphere, seawater, or the like, and is supplied to a demand destination as a gas having a predetermined temperature and pressure.
【0008】[0008]
【発明が解決しようとする課題】従って、従来の空気液
化分離装置においては、LNGが保有する寒冷を大気,
海水等に放出しており、寒冷を十分に利用しているとは
いえず、一方でフロン冷凍機等の冷却源を必要としてい
た。即ち、従来のLNGの寒冷を利用した空気液化分離
装置は、空気成分の液化温度がLNGの気化温度より低
いため、LNGを多量に使用し、−150℃程度の低温
域を利用することで、その電力消費量を低減するよう計
画されることが多い。この場合は、熱バランスから−9
0℃程度以上のLNG寒冷は余剰となり、前述のように
大気,海水等に放出しているのが現状である。Therefore, in the conventional air liquefaction / separation apparatus, the refrigeration held by LNG is reduced to the atmosphere,
It is discharged into seawater and the like, and it cannot be said that the cold is fully utilized, while a cooling source such as a CFC refrigerator is required. That is, the conventional air liquefaction / separation apparatus using the cold of LNG uses a large amount of LNG and uses a low temperature range of about -150 ° C. because the liquefaction temperature of the air component is lower than the vaporization temperature of LNG. It is often planned to reduce its power consumption. In this case, -9 from the heat balance
LNG refrigeration at about 0 ° C. or higher is excessive and is released to the atmosphere, seawater, and the like as described above.
【0009】一方、原料空気中の不純物である二酸化炭
素や水分を吸着除去する場合、吸着温度を5〜15℃に
予冷する必要がある。原料空気を予冷する方法として
は、フロン冷凍機でフロンと熱交換させて直接冷却する
方法と、5〜10℃のチラー水と原料空気とを水洗冷却
塔(充填塔等)に導入して、両者を直接熱交換する方法
があり、さらにチラー水と原料空気とを熱交換器で間接
熱交換させる方法等がある。On the other hand, when adsorbing and removing carbon dioxide and water as impurities in the raw material air, it is necessary to precool the adsorption temperature to 5 to 15 ° C. As a method for pre-cooling the raw material air, a method of directly cooling by exchanging heat with Freon in a Freon refrigerator or introducing chiller water of 5 to 10 ° C. and raw material air into a washing cooling tower (filling tower, etc.) There is a method in which both are directly heat-exchanged, and a method in which chiller water and raw air are indirectly heat-exchanged with a heat exchanger.
【0010】そこで本発明は、LNGの寒冷を空気液化
分離装置の冷却水の冷却源として有効に利用した空気液
化分離装置の冷却水冷却方法及び装置を提供することを
目的としている。Accordingly, an object of the present invention is to provide a cooling water cooling method and apparatus for an air liquefaction / separation apparatus that effectively utilizes the coldness of LNG as a cooling source for the air liquefaction / separation apparatus.
【0011】[0011]
【課題を解決するための手段】上記した目的を達成する
ために、本発明のLNGの寒冷を利用した空気液化分離
装置の冷却水冷却方法は、空気液化分離装置の各部を冷
却水により冷却する冷却手段と、前記冷却水を空冷する
空冷式冷却塔と、該空冷式冷却塔と前記冷却手段とに前
記冷却水を循環供給する冷却水循環系統とを備えた冷却
水冷却設備の前記冷却水を冷却する方法において、空気
液化分離装置の窒素ガスと液化天然ガスとを熱交換して
一部の寒冷を回収して気化した低温天然ガスを前記冷却
手段導入前の前記冷却水と熱交換させることにより前記
低温天然ガスを加温して寒冷を回収し、該回収した寒冷
により前記冷却手段導入前の前記冷却水を冷却すること
を特徴としている。また、前記空気液化分離装置に設置
されている水洗冷却塔に、前記低温天然ガスとの熱交換
により寒冷回収を行い冷却した冷却水を導入し、前記水
洗冷却塔に導入される圧縮原料空気と直接接触させて該
圧縮原料空気を冷却することを特徴とし、さらに、前記
空気液化分離装置に設置された圧縮機のインタークーラ
ー及び/又はアフタークーラーに、前記低温天然ガスと
の熱交換により寒冷回収を行い冷却した冷却水を導入
し、前記圧縮機で圧縮されたガスと間接熱交換させて該
ガスを冷却することを特徴とし、また、前記低温天然ガ
スと熱交換する前記冷却水の水量及び温度が同一になる
ように、気温や水温に応じて前記冷却水循環系統の冷却
水の流量比率を調整することを特徴とし、さらに、前記
冷却水循環系統の冷却水を、気温や水温に応じて加熱す
ることを特徴としている。In order to achieve the above-mentioned object, a cooling water cooling method for an air liquefaction / separation apparatus utilizing the cooling of LNG according to the present invention comprises cooling each part of the air liquefaction / separation apparatus.
Cooling means for cooling by cooling water, and air cooling of the cooling water
Before the air-cooled cooling tower, the air-cooled cooling tower and the cooling means.
Cooling with a cooling water circulation system for circulating the cooling water
In the method for cooling the cooling water of the water cooling equipment, the method includes the step of heat-exchanging the nitrogen gas and the liquefied natural gas of the air liquefaction / separation device to collect a part of the cold and thereby cooling the vaporized low-temperature natural gas.
Refrigeration and recovering the cold natural gas by Rukoto the allowed cooling water heat exchanger before means introducing warming, the recovered refrigeration
This cools the cooling water before introducing the cooling means . Also installed in the air liquefaction separation device
Heat exchange with the low-temperature natural gas
The cold water is collected by cooling and cooled, and the cooling water is introduced.
The raw material is brought into direct contact with the compressed raw material air
Characterized by cooling the compressed raw material air, further comprising:
Compressor intercooler installed in air liquefaction separation unit
-And / or after-cooler
Cold recovery by heat exchange of water and introduction of cooled cooling water
And indirect heat exchange with the gas compressed by the compressor
Gas is cooled, and the low-temperature natural gas is cooled.
The amount and temperature of the cooling water that exchanges heat with the heat
The cooling of the cooling water circulation system according to the air temperature and water temperature
Adjusting the flow rate of water, further comprising:
Heats the cooling water in the cooling water circulation system according to the temperature and water temperature.
It is characterized by that .
【0012】また、本発明のLNGの寒冷を利用した空
気液化分離装置の冷却水冷却装置は、空気液化分離装置
の各部を冷却水により冷却する冷却手段と、前記冷却水
を空冷する空冷式冷却塔と、該空冷式冷却塔と前記冷却
手段とに前記冷却水を循環供給する冷却水循環系統とを
備えた冷却水冷却設備の前記冷却水を冷却する装置にお
いて、空気液化分離装置の窒素ガスと液化天然ガスとを
熱交換して一部の寒冷を回収する液化天然ガス熱交換手
段と、該液化天然ガス熱交換手段で一部の寒冷を回収さ
れて気化した低温天然ガスと前記冷却手段導入前の前記
冷却水とを熱交換させて前記低温天然ガスを加温して寒
冷を回収するとともに該回収した寒冷により前記冷却手
段導入前の前記冷却水を冷却する低温天然ガス加温器と
を備えたことを特徴としている。また、前記空気液化分
離装置は、前記低温天然ガスとの熱交換により寒冷回収
を行い冷却した冷却水を導入し、圧縮原料空気と直接接
触させて該圧縮原料空気を冷却する水洗冷却塔が設置さ
れていることを特徴とし、さらに、前記空気液化分離装
置の圧縮機は、前記低温天然ガスとの熱交換により寒冷
回収を行い冷却した冷却水を導入し、前記圧縮機で圧縮
されたガスと間接熱交換させて該ガスを冷却するインタ
ークーラー及び/又はアフタークーラーが設置されてい
ることを特徴とし、また、前記低温天然ガス加温器は、
該加温器から導出した冷却水の一部を前記加温器の導入
側に直接戻す導管及び戻り量を調整する弁が設けられて
いることを特徴とし、さらに、前記冷却水循環系統は、
前記空冷式冷却塔から導出した冷却水の一部を前記低温
天然ガス加温器を迂回して前記冷却手段に直接導入する
導管及び流量を調整する弁が設けられていることを特徴
とし、また、前記冷却水循環系統は、前記低温天然ガス
加温器の上流側に前記冷却水を加温する加熱器を備えて
いることを特徴とし、さらに、前記冷却水循環系統は、
前記空冷式冷却塔を迂回して前記加熱器に前記冷却水を
導入するバイパス管及び流量を調整する弁が設けられて
いることを特徴とし、また、前記冷却水循環系統は、前
記加熱器を迂回するバイパス管及び流量を調整する弁が
設けられていることを特徴とする。そして、本発明装置
は、空気液化分離装置の各部を冷却する冷却水の冷却装
置であって、前記空気液化分離装置は、原料空気圧縮機
と、原料空気の洗浄及び冷却を行う水洗冷却塔と、窒素
ガスと液化 天然ガスとを熱交換させて該液化天然ガスの
寒冷の一部を回収する液化天然ガス熱交換手段を設けた
循環窒素系統とを有し、前記冷却装置は、前記空気液化
分離装置の各部を冷却水により冷却する冷却手段と、前
記冷却水を空冷する空冷式冷却塔と、該空冷式冷却塔と
前記冷却手段とに前記冷却水を循環供給する冷却水循環
系統とを有し、該冷却水循環系統には、前記液化天然ガ
ス熱交換手段で一部の寒冷を回収されて気化した低温天
然ガスと前記冷却手段導入前の前記冷却水とを熱交換さ
せて前記低温天然ガスを加温して寒冷を回収するととも
に該回収した寒冷により前記冷却手段導入前の前記冷却
水を冷却する低温天然ガス加温器と、該低温天然ガス加
温器の上流側に設けられて前記冷却水を加温する加熱器
と、該加熱器を迂回するバイパス管及び流量を調整する
弁と、前記空冷式冷却塔を迂回して前記加熱器に前記冷
却水を導入するバイパス管及び流量を調整する弁とを備
えたことをも特徴としている。[0012] Further, the cooling water cooling device of the air liquefaction / separation device utilizing the cold of LNG according to the present invention is an air liquefaction / separation device.
Cooling means for cooling each part of the cooling water with cooling water;
An air-cooled cooling tower for air-cooling the air-cooled cooling tower and the cooling
Means and a cooling water circulation system for circulating the cooling water.
Equipment for cooling the cooling water of the cooling water cooling equipment provided
To separate nitrogen gas and liquefied natural gas from the air liquefaction and separation unit.
A liquefied natural gas heat exchanger that recovers part of the cold through heat exchange
And the liquefied natural gas heat exchange means to recover some of the cold
Low-temperature natural gas vaporized by
The low-temperature natural gas is heated by exchanging heat with cooling water to cool the natural gas.
The cold is collected by the collected cold and the cooling
A low-temperature natural gas heater for cooling the cooling water before the stage introduction;
It is characterized by comprising a. In addition, the air liquefied component
The separation device recovers cold by heat exchange with the low-temperature natural gas.
Introduce cooling water that has been cooled and directly contact compressed air.
A washing cooling tower is installed to cool the compressed raw material air by touching it.
Characterized in that the air liquefaction separation device
The compressor is cooled by heat exchange with the low-temperature natural gas.
The cooling water that has been collected and cooled is introduced and compressed by the compressor.
To cool the gas by indirect heat exchange with the gas
-A cooler and / or aftercooler is installed
Characterized in that, the low-temperature natural gas heater,
Part of the cooling water derived from the heater is introduced into the heater.
Provided with a direct return line and a valve for adjusting the return amount
Wherein the cooling water circulation system further comprises:
A part of the cooling water derived from the air-cooled cooling tower is
Introduce directly into the cooling means, bypassing the natural gas heater
It has a conduit and a valve that regulates the flow rate.
And the cooling water circulation system includes the low-temperature natural gas.
A heater for heating the cooling water is provided upstream of the heater.
Wherein the cooling water circulation system further comprises:
The cooling water is bypassed to the heater, bypassing the air-cooled cooling tower.
A bypass pipe to be introduced and a valve to regulate the flow rate are provided
And the cooling water circulation system is
A bypass pipe to bypass the heater and a valve to regulate the flow rate
It is characterized by being provided. And the device of the present invention
Is a cooling device for cooling water that cools each part of the air liquefaction separation device.
Wherein the air liquefaction and separation device is a raw material air compressor.
A washing cooling tower for washing and cooling the raw material air, and nitrogen
Heat exchange between gas and liquefied natural gas
Liquefied natural gas heat exchange means to recover part of the cold
A circulating nitrogen system, wherein the cooling device is configured to liquefy the air.
Cooling means for cooling each part of the separation device with cooling water;
An air-cooled cooling tower that air-cools the cooling water,
Cooling water circulation for circulating the cooling water to the cooling means
And the cooling water circulation system includes the liquefied natural gas.
Low-temperature heaven that has been partially vaporized by heat exchange
Heat exchange between the natural gas and the cooling water before introducing the cooling means.
To recover the cold by heating the low-temperature natural gas.
The cooling before the cooling means is introduced by the collected cold
A low-temperature natural gas heater for cooling water;
A heater provided upstream of the heater to heat the cooling water
And adjust the bypass pipe and the flow rate that bypass the heater
A valve and bypassing the air-cooled cooling tower to the heater.
Equipped with a bypass pipe for introducing drainage water and a valve for adjusting the flow rate
It is also characterized by that .
【0013】[0013]
【作 用】空気液化分離装置の窒素ガスと熱交換したL
NGは、−100℃以上に昇温するが、未だ冷却水を冷
却するのには十分な寒冷を保有しているため、この低温
天然ガスを冷却水と熱交換させることにより、LNGの
寒冷を有効に利用でき、また、冷却水冷却用のフロン冷
凍機等の冷却源を省略できる。[Work] L exchanged heat with nitrogen gas in air liquefaction separation unit
Although NG rises in temperature to -100 ° C. or higher, it still has enough cooling to cool the cooling water. Therefore, by exchanging heat with this low-temperature natural gas with the cooling water, the cooling of LNG is reduced. It can be used effectively and a cooling source such as a CFC refrigerator for cooling water can be omitted.
【0014】[0014]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。まず図1において、空気液化分離装置の冷却水
冷却設備30は、前記図3に示した空気液化分離装置に
おける水洗冷却塔2、原料空気圧縮機1のアフタークー
ラーやインタークーラー1a、あるいは各種圧縮機の冷
却器31等の冷却手段で使用する冷却水を所定温度に冷
却して循環供給する系統を備えるものであって、冷却水
を冷却するための機器としては、前記図3における第一
LNG熱交換器20及び第二LNG熱交換器26で気化
して導管27に導出された低温天然ガスと冷却水とを熱
交換させる低温天然ガス加温器32と、冷却水を大気
(Air)により冷却する空冷式冷却塔33とを備えてい
る。An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, the cooling water cooling system 30 of the cryogenic air separation unit, the Figure 3 washing tower 2 in an air separation plant illustrated in, the feed air compressor 1 aftercooler or intercooler 1a or various compressor, A system for cooling the cooling water used in the cooling means such as the cooler 31 to a predetermined temperature and circulating the cooling water is provided. As a device for cooling the cooling water, the first LNG heat exchange in FIG. Low-temperature natural gas warmer 32 for exchanging heat between the low-temperature natural gas introduced into the conduit 27 and the cooling water by vaporization in the heat exchanger 20 and the second LNG heat exchanger 26, and cooling the cooling water by air. An air-cooled cooling tower 33 is provided.
【0015】上記低温天然ガス加温器32は、前述のよ
うに空気液化分離装置の窒素ガスとLNGとを熱交換し
て一部の寒冷を回収した低温天然ガスと冷却水とを熱交
換させて、LNGが有する残余の寒冷を冷却水の冷却用
寒冷として利用するものである。これにより、LNGが
有する寒冷の大部分を、窒素ガスとの熱交換及び冷却水
との熱交換により回収することが可能となる。The low-temperature natural gas heater 32 exchanges heat between nitrogen gas and LNG of the air liquefaction / separation apparatus as described above, and heat-exchanges low-temperature natural gas from which a part of the cold has been recovered with cooling water. Thus, the remaining cold of the LNG is used as cold for cooling the cooling water. This makes it possible to recover most of the cold of LNG by heat exchange with nitrogen gas and heat exchange with cooling water.
【0016】以下、冷却水冷却設備30における冷却水
の動きを、夏場(空冷式冷却塔33出口水温30℃)と
冬場(大気温度0℃,相対湿度25%)とに分けて説明
する。Hereinafter, the movement of the cooling water in the cooling water cooling equipment 30 will be described separately for summer (water temperature at the outlet of the air-cooled cooling tower 33: 30 ° C.) and winter (atmospheric temperature: 0 ° C., relative humidity: 25%).
【0017】夏場 まず、低温天然ガス加温器32においては、500t/h
の冷却水が、約−90℃の低温天然ガスと熱交換して5
℃に冷却され、導管34を通りポンプ35で導管36に
送出される。この冷却水の内、325t/h は導管37に
分岐し、弁38を介して導管39に至り、前記低温天然
ガス加温器32に戻される。冷却水の一部18t/h は、
導管36から導管40に分岐して前記水洗冷却塔2に供
給され、原料空気GAを予冷して自身は26.7℃に昇
温し、導管41,ポンプ42,導管43を経て前記導管
39を通り、前記低温天然ガス加温器32に戻される。Summertime First, in the low-temperature natural gas heater 32, 500 t / h
Cooling water exchanges heat with low-temperature natural gas at about -90 ° C.
C. and is pumped through a conduit 34 to a conduit 36 by a pump 35. Of the cooling water, 325 t / h is branched to a conduit 37, reaches a conduit 39 via a valve 38, and is returned to the low-temperature natural gas heater 32. 18t / h of cooling water is
From the conduit 36, it is branched to the conduit 40 and supplied to the rinsing cooling tower 2. The raw air GA is pre-cooled, and the temperature thereof is raised to 26.7 ° C., and the conduit 39 is passed through the conduit 41, the pump 42, and the conduit 43. As a result, it is returned to the low-temperature natural gas heater 32.
【0018】また、冷却水の他の一部150t/h は、導
管44に分岐して前記圧縮機の冷却器31に供給され、
昇温して12℃となり導管45から前記導管39を経て
前記低温天然ガス加温器32に戻される。さらに冷却水
の他の一部7t/h は、導管36から弁46を通り、前記
空冷式冷却塔33から導管47,ポンプ48,導管4
9,導管50,弁51,導管52を介して送られた30
1t/h,30℃の冷却水と導管53に合流し、308t/h,
29.4℃となって前記アフタークーラーやインターク
ーラー1aに供給される。ここで40.7℃に昇温した
冷却水は、導管54を経て空冷式冷却塔33に導入さ
れ、大気と熱交換して30℃に冷却される。Another 150 t / h of the cooling water is branched into a conduit 44 and supplied to the cooler 31 of the compressor.
The temperature rises to 12 ° C., and is returned from the conduit 45 to the low-temperature natural gas heater 32 via the conduit 39. Further, another portion 7 t / h of the cooling water passes from the conduit 36 through the valve 46 and from the air-cooled cooling tower 33 to the conduit 47, the pump 48 and the conduit 4.
9, 30 sent via conduit 50, valve 51, conduit 52
1 t / h, 30 ° C cooling water and conduit 53 are combined, and 308 t / h,
It becomes 29.4 ° C. and is supplied to the aftercooler or intercooler 1a. Here, the cooling water heated to 40.7 ° C. is introduced into the air-cooled cooling tower 33 via the conduit 54, and is cooled to 30 ° C. by exchanging heat with the atmosphere.
【0019】空冷式冷却塔33から前記導管47に導出
された冷却水は、前記ポンプ48,導管49を経て、そ
の一部7t/h が弁55を介して前記低温天然ガス加温器
32に通じる導管39に導入される。また、残部301
t/hは、前述のように導管50から前記経路を循環す
る。The cooling water led from the air-cooled cooling tower 33 to the conduit 47 passes through the pump 48 and the conduit 49, and a part of the cooling water is supplied to the low-temperature natural gas heater 32 through a valve 55 at 7 t / h. It is introduced into a conduit 39 leading to it. Also, the remaining part 301
t / h circulates through the path from conduit 50 as described above.
【0020】導管39には、前記導管37,弁38から
の325t/h,5℃の冷却水、導管43からの18t/h,2
6.7℃の冷却水、導管45からの150t/h,12℃の
冷却水、導管49,弁55からの7t/h,30℃の冷却水
が合流し、500t/h,8.3℃の冷却水となって低温天
然ガス加温器32に戻る。The conduit 39 has 325 t / h of cooling water at 5 ° C. from the conduit 37 and the valve 38, and 18 t / h, 2 from the conduit 43.
6.7 ° C. cooling water, 150 t / h from pipe 45, 12 ° C. cooling water, 7 t / h from pipe 49 and valve 55, 30 ° C. cooling water are combined, and 500 t / h, 8.3 ° C. And returns to the low-temperature natural gas heater 32.
【0021】冬場 低温天然ガス加温器32においては、前記同様に、50
0t/h の冷却水が、約−90℃の低温天然ガスと熱交換
して5℃に冷却され、導管34を通りポンプ35で導管
36に送出される。この冷却水の内、282t/h は導管
37に分岐し、弁38を介して導管39に至り、前記低
温天然ガス加温器32に戻される。冷却水の一部18t/
h は、導管36から導管40に分岐して前記水洗冷却塔
2に供給され、原料空気GAを予冷して自身は11.1
℃に昇温し、導管41,ポンプ42,導管43を経て前
記導管39を通り、前記低温天然ガス加温器32に戻さ
れる。Winter In the low-temperature natural gas heater 32, as described above,
The cooling water of 0 t / h is cooled to 5 ° C. by exchanging heat with the low temperature natural gas at about −90 ° C., and is sent to the conduit 36 by the pump 35 through the conduit 34. Of the cooling water, 282 t / h is branched to a conduit 37, reaches a conduit 39 via a valve 38, and is returned to the low-temperature natural gas heater 32. 18 tons of cooling water
h is branched from a conduit 36 to a conduit 40 and supplied to the rinsing cooling tower 2, where the raw material air GA is pre-cooled, and the raw material air GA is cooled to 11.1.
The temperature is raised to 0 ° C., and is returned to the low-temperature natural gas heater 32 through the conduit 39 via the conduit 41, the pump 42, and the conduit 43.
【0022】また、冷却水の他の一部150t/h は、導
管44に分岐して前記圧縮機の冷却器31に供給され、
昇温して12℃となり導管45から前記導管39を経て
前記低温天然ガス加温器32に戻される。さらに冷却水
の他の一部50t/h は、導管36から弁46を通り、前
記空冷式冷却塔33から導管47,ポンプ48,導管4
9,導管50,弁51,導管52を介して送られた25
8t/h,14.9℃の冷却水と導管53に合流し、308
t/h,13.3℃となって前記アフタークーラーやインタ
ークーラー1aに供給される。ここで24.6℃に昇温
した冷却水は、導管54を経て空冷式冷却塔33に導入
され、大気と熱交換して14.9℃に冷却される。Another 150 t / h of the cooling water is branched into a conduit 44 and supplied to the cooler 31 of the compressor.
The temperature rises to 12 ° C., and is returned from the conduit 45 to the low-temperature natural gas heater 32 via the conduit 39. Further, another 50 t / h of the cooling water passes from the conduit 36 through the valve 46 and from the air-cooled cooling tower 33 to the conduit 47, the pump 48, and the conduit 4.
9, 25 sent via conduit 50, valve 51, conduit 52
8t / h, 14.9 ° C cooling water and conduit 53
t / h, 13.3 ° C., and is supplied to the aftercooler or intercooler 1a. Here, the cooling water heated to 24.6 ° C. is introduced into the air-cooled cooling tower 33 via the conduit 54, and is cooled to 14.9 ° C. by heat exchange with the atmosphere.
【0023】空冷式冷却塔33から前記導管47に導出
された冷却水は、前記ポンプ48,導管49を経て、そ
の一部50t/h が弁55を介して前記低温天然ガス加温
器32に通じる導管39に導入される。また、残部25
8t/h は、前述のように導管50から前記経路を循環す
る。The cooling water guided from the air-cooled cooling tower 33 to the conduit 47 passes through the pump 48 and the conduit 49, and a part of the cooling water is supplied to the low-temperature natural gas heater 32 through a valve 55 at 50 t / h. It is introduced into a conduit 39 leading to it. The remaining 25
8 t / h circulates in the path from conduit 50 as described above.
【0024】導管39には、前記導管37,弁38から
の282t/h,5℃の冷却水、導管43からの18t/h,1
1.1℃の冷却水、導管45からの150t/h,12℃の
冷却水、導管49,弁55からの50t/h,14.9℃の
冷却水が合流し、500t/h,8.3℃の冷却水となって
低温天然ガス加温器32に戻る。The conduit 39 has 282 t / h of cooling water at 5 ° C. from the conduit 37 and the valve 38, and 18 t / h, 1 from the conduit 43.
The cooling water at 1.1 ° C., the cooling water at 150 t / h from the conduit 45, the cooling water at 12 ° C., the cooling water at 50 t / h from the conduit 49 and the valve 55, and the cooling water at 14.9 ° C. are combined to form 500 t / h, 8. The cooling water becomes 3 ° C. and returns to the low-temperature natural gas heater 32.
【0025】このように、気温や水温が異なる夏場と冬
場で各部の流量を調整することにより、低温天然ガス加
温器32に供給する冷却水量,温度を同一にすることが
でき、低温天然ガス加温器32における熱移動量、即
ち、プロセスガスとLNGとを熱交換して一部の寒冷を
回収した後の低温天然ガスが保有する寒冷の回収量を年
間を通じて略一定に保つことができる。As described above, by adjusting the flow rate of each part in summer and winter when the temperature and water temperature are different, the amount and temperature of the cooling water supplied to the low-temperature natural gas heater 32 can be made the same, and the low-temperature natural gas can be cooled. The amount of heat transfer in the heater 32, that is, the amount of cold collected by the low-temperature natural gas after the heat exchange between the process gas and LNG and a part of the cold collected can be kept substantially constant throughout the year. .
【0026】従って、従来放出されていたLNGの余剰
寒冷を効率よく回収できる。またこれにより、吸着器に
導入する原料空気を十分に冷却して吸着効率を向上で
き、圧縮機の圧縮効率を向上させて消費動力を低減でき
る。さらに従来用いられていたフロン冷凍機等の冷却設
備も省略でき、この分の動力費を削減できる。加えて、
低温天然ガス加温器32を導出する低温天然ガスの温度
も、気温や水温(海水温度)に関係なく一定に保つこと
ができる。Therefore, the surplus refrigeration of the conventionally released LNG can be efficiently recovered. In addition, thereby, the raw material air introduced into the adsorber can be sufficiently cooled to improve the adsorption efficiency, and the compression efficiency of the compressor can be improved to reduce power consumption. Further, cooling equipment such as a CFC refrigerator used conventionally can be omitted, and the power cost can be reduced accordingly. in addition,
The temperature of the low-temperature natural gas derived from the low-temperature natural gas heater 32 can be kept constant irrespective of the air temperature or the water temperature (seawater temperature).
【0027】次に、図2は冬季の冷却水の凍結防止を配
慮した構成を付加した例を示している。即ち、図2に示
す冷却水冷却装置は、上記図1に示した冷却水冷却装置
30の空冷式冷却塔33に対応するように加熱器60を
設置し、該加熱器60及び空冷式冷却塔33をバイパス
させるバイパス管61,62,63を設けるとともに、
原料空気圧縮機のアフタークーラーやインタークーラー
1a,1b部分にバイパス管64を設け、さらにそれぞ
れのバイパス流量を調整するための弁を配設したもので
ある。尚、前記冷却水冷却装置30と同一構成要素のも
のには同一符号を付して詳細な説明は省略する。Next, FIG. 2 shows an example in which a configuration taking into account the prevention of freezing of cooling water in winter is added. That is, in the cooling water cooling device shown in FIG. 2, the heater 60 is installed so as to correspond to the air cooling type cooling tower 33 of the cooling water cooling device 30 shown in FIG. 1, and the heater 60 and the air cooling type cooling tower are provided. In addition to providing bypass pipes 61, 62, 63 for bypassing 33,
The aftercooler and the intercooler 1a, 1b of the raw material air compressor are provided with bypass pipes 64, and further provided with valves for adjusting the respective bypass flow rates. The same components as those of the cooling water cooling device 30 are denoted by the same reference numerals, and detailed description is omitted.
【0028】まず、通常の使用状態においては、加熱器
60の弁60a及びバイパス管61の弁61aを閉じ、
バイパス管62の弁62a及びバイパス管63の弁63
aを開く。これにより、冷却水は、導管54から空冷式
冷却塔33に供給され、大気と熱交換して所定温度に冷
却された後、導管47,バイパス管62,バイパス管6
3,ポンプ48,導管49を経て前記同様に循環する。First, in a normal use state, the valve 60a of the heater 60 and the valve 61a of the bypass pipe 61 are closed,
The valve 62a of the bypass pipe 62 and the valve 63 of the bypass pipe 63
Open a. As a result, the cooling water is supplied to the air-cooled cooling tower 33 from the conduit 54, exchanges heat with the atmosphere, and is cooled to a predetermined temperature, and then the conduit 47, the bypass pipe 62, and the bypass pipe 6 are cooled.
3, circulating through the pump 48 and the conduit 49 in the same manner as described above.
【0029】また、大気温が下がり、各冷却部における
冷却水の昇温度が低下し、低温天然ガス加温器32にお
ける冷却水の冷却能力が過剰となり、該低温天然ガス加
温器32等で冷却水が凍結するおそれがでた場合には、
弁46,バイパス管64の弁64a,64bを適度に開
いて、低温天然ガス加温器32で冷却された冷却水を、
空冷式冷却塔33又は加熱器60に供給する。このと
き、空冷式冷却塔33に供給される水温が大気温より低
ければ、冷却水は大気により加温される。尚、弁46を
開くことによって、アフタークーラーやインタークーラ
ー1a,1b部分に供給される冷却水量が増加するの
で、弁1c,1d,1e,1fの開度を調節してアフタ
ークーラーやインタークーラー1a,1bに供給する冷
却水量を適度に保つ。Further, the ambient temperature drops, the temperature rise of the cooling water in each cooling section decreases, and the cooling capacity of the cooling water in the low-temperature natural gas heater 32 becomes excessive. If there is a possibility that the cooling water will freeze,
The valve 46 and the valves 64a and 64b of the bypass pipe 64 are opened appropriately, and the cooling water cooled by the low-temperature natural gas heater 32 is
It is supplied to the air-cooled cooling tower 33 or the heater 60. At this time, if the temperature of the water supplied to the air-cooled cooling tower 33 is lower than the ambient temperature, the cooling water is heated by the atmosphere. By opening the valve 46, the amount of cooling water supplied to the aftercooler and the intercoolers 1a and 1b increases. Keep the amount of cooling water supplied to the tank moderate.
【0030】大気温がさらに低下し、空冷式冷却塔33
をバイパスさせる必要が生じた場合には、弁54a,弁
47aを閉じて、弁61a,弁63aを開けばよい。ま
た、加熱器60で冷却水を加熱する場合には、弁63a
を閉じて、弁60a,弁61a,弁62aを開けばよ
い。このように、前記低温天然ガス加温器32の上流側
に加熱器60を設置するとともに、適宜部分にバイパス
管を設けることにより、夏場等の大気温が高いときも、
冬場に大気温度が低下して冷却水が凍結するおそれがあ
る場合でも、LNGの残余の寒冷を冷却水の冷却源とし
て回収し、原料空気等を十分に冷却できる。尚、加熱器
60を設置すると加熱源を必要とするが、フロン冷凍機
に要する動力量に比べてはるかに少なくてすみ、LNG
の寒冷回収による動力費低減効果のほうがはるかに大き
い。The atmospheric temperature further decreases, and the air-cooled cooling tower 33
If it is necessary to bypass the valve, the valves 54a and 47a may be closed and the valves 61a and 63a may be opened. When the cooling water is heated by the heater 60, the valve 63a
, And the valves 60a, 61a, and 62a may be opened. Thus, the upstream side of the low-temperature natural gas heater 32
In addition to installing the heater 60 at the appropriate time, by providing a bypass pipe in an appropriate portion, even when the ambient temperature is high such as in summer,
Even in the case where there is a possibility that the cooling water may freeze due to a decrease in the atmospheric temperature in winter, the remaining cold of the LNG can be collected as a cooling water cooling source, and the raw material air and the like can be sufficiently cooled. In addition, when the heater 60 is installed, a heating source is required, but it requires much less power than the CFC refrigerator requires.
The power cost reduction effect of cold recovery is much greater.
【0031】尚、各種機器の配置及び配管は、原料空気
量(空気液化分離装置の規模),LNGの量,冷却水の
量,各部の冷却能力等、様々な条件を勘案して適宜な状
態にすることができる。また、低温天然ガス加温器の形
態は、冷却水と低温天然ガスとの間に別の熱媒体を介在
させてもよく、オープンラックベーパライザーやシェル
アンドチューブ等の間接熱交換器方式としてもよい。さ
らに上記実施例では、気化した低温天然ガスから寒冷を
回収するようにしたが、LNGを直接、低温天然ガス加
温器(LNG蒸発加温器)に導入して気化させてもよ
い。また、水洗冷却塔に代えて間接熱交換器を用いても
よい。The arrangement and piping of the various devices are in an appropriate state in consideration of various conditions such as the amount of raw material air (the scale of the air liquefaction separator), the amount of LNG, the amount of cooling water, and the cooling capacity of each part. Can be Further, the form of the low-temperature natural gas heater may be such that another heat medium may be interposed between the cooling water and the low-temperature natural gas, and may be an indirect heat exchanger system such as an open rack vaporizer or a shell and tube. Good. Further, in the above embodiment, the cold was recovered from the vaporized low-temperature natural gas. However, LNG may be directly introduced into the low-temperature natural gas heater (LNG evaporator and heater) to be vaporized. Further, an indirect heat exchanger may be used instead of the washing cooling tower.
【0032】[0032]
【発明の効果】以上説明したように、本発明によれば、
従来、大気や海水等に放出していたLNGの余剰寒冷を
空気液化分離装置の冷却水冷却設備における冷却水によ
って回収することにより、十分に冷却された原料空気予
冷用冷却水や圧縮機に付随する冷却器用冷却水を容易に
得ることができる。また、低温天然ガスの出口温度も一
定に保つことが可能となる。As described above, according to the present invention,
By collecting the excess refrigeration of LNG, which had been released into the atmosphere or seawater, with the cooling water in the cooling water cooling equipment of the air liquefaction / separation unit, it was attached to the sufficiently cooled raw air precooling cooling water and compressor. Cooling water for the cooler can be easily obtained. Further, the outlet temperature of the low-temperature natural gas can be kept constant.
【0033】従って、空気液化分離装置の冷却水冷却設
備における動力費を低減するとともに、吸着器の吸着効
率の向上や圧縮機の圧縮効率の向上が図れ、空気液化分
離装置全体の効率向上が図れる。Accordingly, the power cost in the cooling water cooling equipment of the air liquefaction / separation device can be reduced, the adsorption efficiency of the adsorber and the compression efficiency of the compressor can be improved, and the efficiency of the entire air liquefaction / separation device can be improved. .
【図1】 本発明の一実施例を示す冷却水冷却設備の系
統図である。FIG. 1 is a system diagram of a cooling water cooling system showing an embodiment of the present invention.
【図2】 本発明の他の実施例を示す冷却水冷却設備の
系統図である。FIG. 2 is a system diagram of a cooling water cooling system showing another embodiment of the present invention.
【図3】 LNGの寒冷を利用した空気液化分離装置の
一例を示す系統図である。FIG. 3 is a system diagram showing an example of an air liquefaction / separation apparatus using the cold of LNG.
1…原料空気圧縮機 1a,1b…アフタークーラー
やインタークーラー 2…水洗冷却塔 30…冷却設備 31…圧縮機の
冷却器 32…低温天然ガス加温器 33…空冷式
冷却塔 60…加熱器DESCRIPTION OF SYMBOLS 1 ... Raw material air compressor 1a, 1b ... Aftercooler and intercooler 2 ... Rinse cooling tower 30 ... Cooling equipment 31 ... Compressor cooler 32 ... Low temperature natural gas heater 33 ... Air-cooled cooling tower 60 ... Heater
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) F25J 1/00 - 5/00 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 7 , DB name) F25J 1/00-5/00
Claims (14)
冷却する冷却手段と、前記冷却水を空冷する空冷式冷却
塔と、該空冷式冷却塔と前記冷却手段とに前記冷却水を
循環供給する冷却水循環系統とを備えた冷却水冷却設備
の前記冷却水を冷却する方法において、空気液化分離装
置の窒素ガスと液化天然ガスとを熱交換して一部の寒冷
を回収して気化した低温天然ガスを前記冷却手段導入前
の前記冷却水と熱交換させることにより前記低温天然ガ
スを加温して寒冷を回収し、該回収した寒冷により前記
冷却手段導入前の前記冷却水を冷却することを特徴とす
る液化天然ガスの寒冷を利用した空気液化分離装置の冷
却水冷却方法。1. Each part of the air liquefaction / separation apparatus is cooled by cooling water.
Cooling means for cooling, and air cooling for air cooling the cooling water
Tower, the air-cooled cooling tower and the cooling means,
Cooling water cooling system equipped with a circulating cooling water circulation system
In the method for cooling the cooling water, the nitrogen gas and the liquefied natural gas in the air liquefaction / separation apparatus are subjected to heat exchange to recover a part of the cold and vaporize the low-temperature natural gas before introducing the cooling means.
Wherein the cooling water and Rukoto to heat exchange to recover refrigeration and warmed the cold natural gas, said by cold that the recovery of
A cooling water cooling method for an air liquefaction / separation apparatus utilizing the cooling of liquefied natural gas , wherein the cooling water is cooled before introducing cooling means .
水洗冷却塔に、前記低温天然ガスとの熱交換により寒冷
回収を行い冷却した冷却水を導入し、前記水洗冷却塔に
導入される圧縮原料空気と直接接触させて該圧縮原料空
気を冷却することを特徴とする請求項1記載の液化天然
ガスの寒冷を利用した空気液化分離装置の冷却水冷却方
法。2. Cooling water cooled and recovered by heat exchange with the low-temperature natural gas is introduced into a washing / cooling tower installed in the air liquefaction / separation apparatus, and the cooling water is introduced into the washing / cooling tower .
The compressed raw material air is brought into direct contact with the compressed raw material air to be introduced.
2. The method for cooling cooling water of an air liquefaction / separation apparatus according to claim 1, wherein air is cooled.
機のインタークーラー及び/又はアフタークーラーに、
前記低温天然ガスとの熱交換により寒冷回収を行い冷却
した冷却水を導入し、前記圧縮機で圧縮されたガスと間
接熱交換させて該ガスを冷却することを特徴とする請求
項1記載の液化天然ガスの寒冷を利用した空気液化分離
装置の冷却水冷却方法。3. The compression installed in the air liquefaction separation device.
Machine intercooler and / or aftercooler,
Cooling water that has been subjected to cold recovery by heat exchange with the low-temperature natural gas is introduced, and the cooling water is introduced between the gas and the gas compressed by the compressor.
2. The cooling water cooling method for an air liquefaction / separation apparatus according to claim 1, wherein said gas is cooled by heat exchange .
水の水量及び温度が同一になるように、気温や水温に応
じて前記冷却水循環系統の冷却水の流量比率を調整する
ことを特徴とする請求項1記載の液化天然ガスの寒冷を
利用した空気液化分離装置の冷却水冷却方法。 4. The cooling for exchanging heat with the low-temperature natural gas.
Adjust the temperature and water temperature so that the water volume and temperature are the same.
The flow rate ratio of the cooling water in the cooling water circulation system
The refrigeration of liquefied natural gas according to claim 1,
The cooling water cooling method of the air liquefaction / separation device used .
水温に応じて加熱することを特徴とする請求項1記載の
液化天然ガスの寒冷を利用した空気液化分離装置の冷却
水冷却方法。 5. The cooling water of the cooling water circulating system is controlled by temperature or temperature.
2. The method according to claim 1, wherein the heating is performed according to the water temperature.
Cooling of air liquefaction and separation equipment using refrigeration of liquefied natural gas
Water cooling method .
冷却する冷却手段と、前記冷却水を空冷する空冷式冷却
塔と、該空冷式冷却塔と前記冷却手段とに前記冷却水を
循環供給する冷却水循環系統とを備えた冷却水冷却設備
の前記冷却水 を冷却する装置において、空気液化分離装
置の窒素ガスと液化天然ガスとを熱交換して一部の寒冷
を回収する液化天然ガス熱交換手段と、該液化天然ガス
熱交換手段で一部の寒冷を回収されて気化した低温天然
ガスと前記冷却手段導入前の前記冷却水とを熱交換させ
て前記低温天然ガスを加温して寒冷を回収するとともに
該回収した寒冷により前記冷却手段導入前の前記冷却水
を冷却する低温天然ガス加温器とを備えたことを特徴と
する液化天然ガスの寒冷を利用した空気液化分離装置の
冷却水冷却装置。6. Each part of the air liquefaction / separation apparatus is cooled by cooling water.
Cooling means for cooling, and air cooling for air cooling the cooling water
Tower, the air-cooled cooling tower and the cooling means,
Cooling water cooling system equipped with a circulating cooling water circulation system
In the apparatus for cooling the cooling water according to the above,
Heat exchange between nitrogen gas and liquefied natural gas
Liquefied natural gas heat exchange means for recovering liquefied natural gas
Low-temperature natural gas that has been partially vaporized by heat exchange means and vaporized
Heat exchange between the gas and the cooling water before introducing the cooling means.
To recover the cold by heating the low-temperature natural gas
Due to the collected cold, the cooling water before introducing the cooling means
And a low-temperature natural gas heater for cooling the liquefied natural gas.
ガスとの熱交換により寒冷回収を行い冷却した冷却水を
導入し、圧縮原料空気と直接接触させて該圧縮原料空気
を冷却する水洗冷却塔が設置されていることを特徴とす
る請求項6記載の液化天然ガスの寒冷を利用した空気液
化分離装置の冷却水冷却装置。7. The low-temperature natural liquefaction / separation apparatus according to claim 1,
Cooling water is recovered by cooling with heat exchange with gas
Introduced and brought into direct contact with the compressed raw material air
7. A cooling water cooling device for an air liquefaction / separation device utilizing refrigeration of liquefied natural gas according to claim 6, further comprising a washing cooling tower for cooling the liquefied natural gas.
低温天然ガスとの熱交換により寒冷回収を行い冷却した
冷却水を導入し、前記圧縮機で圧縮されたガスと間接熱
交換させて該ガスを冷却するインタークーラー及び/又
はアフタークーラーが設置されていることを特徴とする
請求項6又は7記載の液化天然ガスの寒冷を利用した空
気液化分離装置の冷却水冷却装置。 8. The compressor of the air liquefaction separation device,
Cold recovery and cooling by heat exchange with low-temperature natural gas
Introducing cooling water, gas compressed by the compressor and indirect heat
An intercooler for cooling the gas by replacement
The cooling water cooling device for an air liquefaction / separation device using refrigeration of liquefied natural gas according to claim 6 or 7, further comprising an aftercooler .
ら導出した冷却水の一部を前記加温器の導入側に直接戻
す導管及び戻り量を調整する弁が設けられていることを
特徴とする請求項6乃至8のいずれか1項記載の液化天
然ガスの寒冷を利用した空気液化分離装置の冷却水冷却
装置。9. The low-temperature natural gas heater includes a heater.
A part of the cooling water derived from the heater is returned directly to the inlet of the heater.
The cooling water cooling device for an air liquefaction / separation device utilizing refrigeration of liquefied natural gas according to any one of claims 6 to 8, further comprising a conduit for adjusting a return amount of the liquefied natural gas.
却塔から導出した冷却水の一部を前記低温天然ガス加温
器を迂回して前記冷却手段に直接導入する導管及び流量
を調整する弁が設けられていることを特徴とする請求項
6乃至9のいずれか1項記載の液化天然ガスの寒冷を利
用した空気液化分離装置の冷却水冷却装置。 10. The cooling water circulation system includes the air-cooled cooling system.
Part of the cooling water derived from the tower is heated by the low-temperature natural gas
Conduit and flow rate bypassing the vessel and introducing directly to said cooling means
Claim: A valve for adjusting pressure is provided.
10. A cooling water cooling device for an air liquefaction / separation device utilizing the refrigeration of liquefied natural gas according to any one of 6 to 9 .
ガス加温器の上流側に前記冷却水を加温する加熱器を備
えていることを特徴とする請求項6乃至10のいずれか
1項記載の液化天然ガスの寒冷を利用した空気液化分離
装置の冷却水冷却装置。11. The cooling water circulation system according to claim 1 , wherein:
A heater for heating the cooling water is provided upstream of the gas heater.
11. The method according to claim 6, wherein:
2. A cooling water cooling device for an air liquefaction / separation device utilizing the refrigeration of liquefied natural gas according to claim 1 .
却塔を迂回して前記加熱器に前記冷却水を導入するバイ
パス管及び流量を調整する弁が設けられていることを特
徴とする請求項11記載の液化天然ガスの寒冷を利用し
た空気液化分離装置の冷却水冷却装置。 12. The cooling water circulation system includes an air-cooled cooling system.
A bypass for introducing the cooling water into the heater, bypassing the cooling tower
The cooling water cooling device for an air liquefaction / separation device using refrigeration of liquefied natural gas according to claim 11, further comprising a pass pipe and a valve for adjusting a flow rate .
迂回するバイパス管及び流量を調整する弁が設けられて
いることを特徴とする請求項11又は12記載の液化天
然ガスの寒冷を利用した空気液化分離装置の冷却水冷却
装置。13. The cooling water circulation system includes the heater
A bypass pipe to bypass and a valve to regulate the flow rate are provided
Cooling water cooling system of an air separation plant utilizing the cold of liquefied natural gas according to claim 11 or 12 further characterized in that there.
却水の冷却装置であって、前記空気液化分離装置は、原
料空気圧縮機と、原料空気の洗浄及び冷却を行う水洗冷
却塔と、窒素ガスと液化天然ガスとを熱交換させて該液
化天然ガスの寒冷の一部を回収する液化天然ガス熱交換
手段を設けた循環窒素系統とを有し、前記冷却装置は、
前記空気液化分離装置の各部を冷却水により冷却する冷
却手段と、前記冷却水を空冷する空冷式冷却塔と、該空
冷式冷却塔と前記冷却手段とに前記冷却水を循環供給す
る冷却水循環系統とを有し、該冷却水循環系統には、前
記液化天然ガス熱交換手段で一部の寒冷を回収されて気
化した低温天然ガスと前記冷却手段導入前の前記冷却水
とを熱交換させて前記低温天然ガスを加温して寒冷を回
収するとともに該回収した寒冷により前記冷却手段導入
前の前記冷却水を冷却する低温天然ガス加温器と、該低
温天然ガス加温器の上流側に設けられて前記冷却水を加
温する加熱器と、該加熱器を迂回するバイパス管及び流
量を調整する弁と、前記空冷式冷却塔を迂回して前記加
熱器に前記冷却水を導入するバイパス管及び流量を調整
する弁とを備えたことを特徴とする液化天然ガスの寒冷
を利用した空気液化分離装置の冷却水冷却装置。14. A cooling device for cooling each part of the air liquefaction / separation apparatus.
A cooling device for recirculating water, wherein the air liquefaction / separation device comprises:
Rinse air compressor and water cooling to clean and cool the raw air
Heat exchange between the nitrogen gas and liquefied natural gas
Liquefied natural gas heat exchange to recover part of the liquefied natural gas cold
A circulating nitrogen system provided with a means, wherein the cooling device comprises:
Cooling each part of the air liquefaction separation device with cooling water
Cooling means, an air-cooled cooling tower for air-cooling the cooling water,
Circulating the cooling water to the cooling tower and the cooling means
Cooling water circulation system, and the cooling water circulation system
Part of the cold collected by the liquefied natural gas heat exchange means
Low temperature natural gas and the cooling water before introducing the cooling means
And heat the low-temperature natural gas to recover the cold.
The cooling means is introduced by the collected cold
A low-temperature natural gas heater for cooling said cooling water,
The cooling water is provided upstream of the warm natural gas heater.
A heater to be heated, and a bypass pipe and a flow bypassing the heater.
A valve for adjusting the flow rate and the cooling air bypassing the air-cooled cooling tower.
Adjust the bypass pipe and the flow rate to introduce the cooling water into the heater
A cooling water cooling device for an air liquefaction / separation device utilizing the refrigeration of liquefied natural gas.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP40899890A JP3191161B2 (en) | 1990-12-28 | 1990-12-28 | Cooling water cooling method and apparatus for air liquefaction / separation apparatus utilizing refrigeration of liquefied natural gas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP40899890A JP3191161B2 (en) | 1990-12-28 | 1990-12-28 | Cooling water cooling method and apparatus for air liquefaction / separation apparatus utilizing refrigeration of liquefied natural gas |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04251181A JPH04251181A (en) | 1992-09-07 |
JP3191161B2 true JP3191161B2 (en) | 2001-07-23 |
Family
ID=18518387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP40899890A Expired - Fee Related JP3191161B2 (en) | 1990-12-28 | 1990-12-28 | Cooling water cooling method and apparatus for air liquefaction / separation apparatus utilizing refrigeration of liquefied natural gas |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3191161B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1705443A1 (en) * | 2005-02-11 | 2006-09-27 | Linde Aktiengesellschaft | Process and apparatus for cooling a gas by direct heat exchange with a liquid refrigerant |
CN1847766A (en) | 2005-02-11 | 2006-10-18 | 林德股份公司 | Process and apparatus for cooling a gas by direct heat exchange with a liquid refrigerant |
-
1990
- 1990-12-28 JP JP40899890A patent/JP3191161B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH04251181A (en) | 1992-09-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4521833B2 (en) | Cryogenic refrigeration method and apparatus | |
EP0211957A1 (en) | Apparatus for producing high-purity nitrogen and oxygen gases | |
EP1055894B1 (en) | Air separation method and air separation plant | |
US4192662A (en) | Process for liquefying and rectifying air | |
US20150345834A1 (en) | Refrigeration and/or liquefaction device, and corresponding method | |
JP3191161B2 (en) | Cooling water cooling method and apparatus for air liquefaction / separation apparatus utilizing refrigeration of liquefied natural gas | |
KR20240032909A (en) | Equipment and methods for liquefying hydrogen | |
US20130291585A1 (en) | Installation and Method for Producing Liquid Helium | |
JPH06123553A (en) | Method and device for separating air incorporating power generation equipment utilizing cold of liquefied natural gas | |
JPH0563717B2 (en) | ||
JP2003021458A (en) | Low-temperature air separation equipment | |
JP3537199B2 (en) | Air separation method and air separation device used in the method | |
CN114849262B (en) | NG purifying low-abundance carbon 13 stable isotope co-production device and use method | |
CN118182734B (en) | Floating liquefied natural gas device and helium recovery method | |
JPS6353470B2 (en) | ||
JPH0689956B2 (en) | Small He liquefaction refrigeration system | |
JPS6338632B2 (en) | ||
JPS62280571A (en) | Method and device for precooling liquefying refrigerator | |
JPH07167555A (en) | Method and device for air liquefaction and separation | |
JP3175003B2 (en) | Nitrogen production equipment | |
JPH0514152Y2 (en) | ||
JPH0694957B2 (en) | Pre-cooling method for cryogenic refrigerator | |
JPH0643647Y2 (en) | Cryogenic refrigerator | |
JPH0784961B2 (en) | Helium liquefier | |
CA1076470A (en) | Process for liquefying and rectifying air |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100525 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100525 Year of fee payment: 9 |
|
LAPS | Cancellation because of no payment of annual fees |