JPH0493585A - Method and apparatus for liquifying and separating air suitable for variation in demand - Google Patents

Method and apparatus for liquifying and separating air suitable for variation in demand

Info

Publication number
JPH0493585A
JPH0493585A JP2210710A JP21071090A JPH0493585A JP H0493585 A JPH0493585 A JP H0493585A JP 2210710 A JP2210710 A JP 2210710A JP 21071090 A JP21071090 A JP 21071090A JP H0493585 A JPH0493585 A JP H0493585A
Authority
JP
Japan
Prior art keywords
air
product gas
product
liquefied
gas
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.)
Granted
Application number
JP2210710A
Other languages
Japanese (ja)
Other versions
JP3026098B2 (en
Inventor
Osamu Utada
宇多田　修
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Oxygen Co Ltd
Nippon Sanso Corp
Original Assignee
Japan Oxygen Co Ltd
Nippon Sanso Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Japan Oxygen Co Ltd, Nippon Sanso Corp filed Critical Japan Oxygen Co Ltd
Priority to JP02210710A priority Critical patent/JP3026098B2/en
Publication of JPH0493585A publication Critical patent/JPH0493585A/en
Application granted granted Critical
Publication of JP3026098B2 publication Critical patent/JP3026098B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F25J3/04333—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
    • F25J3/04339—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 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
    • F25J3/04151—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
    • F25J3/04472—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages
    • F25J3/04496—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist
    • F25J3/04503—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems
    • 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
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04781—Pressure changing devices, e.g. for compression, expansion, liquid pumping
    • 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/40—Processes or apparatus involving steps for recycling of process streams the recycled stream being 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/50—Processes or apparatus involving steps for recycling of process streams the recycled stream being oxygen
    • 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
    • F25J2250/00—Details related to the use of reboiler-condensers
    • F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
    • F25J2250/40—One fluid being 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
    • F25J2250/00—Details related to the use of reboiler-condensers
    • F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
    • F25J2250/50—One fluid being oxygen
    • 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
    • F25J2280/00—Control of the process or apparatus
    • F25J2280/02—Control in general, load changes, different modes ("runs"), measurements
    • 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
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/62—Details of storing a fluid in a tank

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

PURPOSE:To cope with variation in demand of product gas by a method wherein when the demand is increased, stored product liquified gas is gasified through heat exchanging with circulating air and merged with a product gas feeding line, the liquified air is stored, non- liquified air is recirculated, an increasing or decreasing of the amount of circulated air is accomodated by the amount of suction of raw material air and then the amount of raw material air is kept at its predetermined volume. CONSTITUTION:In the event that the amount of demand of product oxygen gas is increased, the pressure within a product gas line 8 is decreased, a pressure adjustor 8a is operated, an adjusting valve 8c is opened and then liquified oxygen in a liquified oxygen storing tank 11 is decreased and fed into a product gas gasification device 13. The liquified oxygen is heat exchanged with air of which pressure is increased by a circulating air compressor 14, gasfified, fed into the product gas line 8, merged with the product oxygen gas and then transported to an end user. Air liquified at the product gas gasification device 13 is stored in a liquified air storing tank 10, non-liquified air is circulated from a conduit 24 to the circulating air compressor 14. In the event that a part of the air is liquified and its circulating amount is decreased, a suction guide vane 4b is operated by a flow rate adjustor 4a to increase the amount of air sucked by the raw material air compressor 1 and then the amount of raw material air fed into a cold box 5 is kept constant.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、需要変動に適した空気分離化方法及び装置に
関し、詳しくは、精留塔の状態を一定に維持するととも
に、製品ガス圧送機を増減量運転することなく需要変動
に対応する空気分離液化方法及び装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air separation method and apparatus suitable for demand fluctuations, and more specifically, the present invention relates to an air separation method and apparatus that are suitable for demand fluctuations, and in particular, maintains a constant state of a rectification column and a product gas pumping machine. The present invention relates to an air separation and liquefaction method and apparatus that can respond to demand fluctuations without increasing or decreasing operation.

〔従来の技術〕[Conventional technology]

空気分離装置から得られる酸素や窒素の量を、その需要
変動に応して増減する手段として、従来から様々な方法
及び装置が提案されてきている。Various methods and devices have been proposed in the past as means for increasing or decreasing the amount of oxygen or nitrogen obtained from an air separation device in response to fluctuations in demand.

例えば、特公昭４９−４５９９７号公報に記載された需
要変動に適した酸素製造装置では、製品酸素ガスの需要
変動に対して、需要が減少した場合には、精留塔上部塔
から導出する酸素ガスをあらかじめ貯留されている液化
空気と熱交換させ、液化酸素として貯留するとともに、
該熱交換により気化した空気を精留塔に導入し、逆に製
品酸素ガスの需要が増大した場合には、需要減少時に貯
留した液化酸素を原料空気の一部と熱交換させて気化し
、精留塔から分離製出した製品酸素ガスに合流させると
ともに、該熱交換により液化した原料空気の一部を上記
需要減少時の酸素ガスを液化させるために貯留していた
。For example, in the oxygen production equipment suitable for demand fluctuations described in Japanese Patent Publication No. 49-45997, when the demand for product oxygen gas decreases, the oxygen produced from the upper column of the rectification column is The gas is exchanged with pre-stored liquefied air and stored as liquefied oxygen.
The air vaporized by the heat exchange is introduced into the rectification column, and when the demand for product oxygen gas increases, the liquefied oxygen stored when the demand decreases is vaporized by heat exchange with a part of the raw air. It was combined with the product oxygen gas separated and produced from the rectification tower, and a part of the raw material air liquefied by the heat exchange was stored in order to liquefy the oxygen gas when the demand decreased.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかしながら、上述の方法では、製品酸素ガスの需要変
動により、精留塔に導入する原料空気量が変化するため
、精留塔内の圧力や精留バランスが不安定となり、精留
効率が低下することがあった。However, in the above method, the amount of feed air introduced into the rectification column changes due to fluctuations in the demand for product oxygen gas, which makes the pressure and rectification balance in the rectification column unstable, resulting in a decrease in rectification efficiency. Something happened.

特にアルゴンを採取するために、上部塔に粗アルゴン塔
を付設した空気分離装置においては、上部塔内の精留バ
ランスの乱れがアルゴンの採取効率に大きく影響を与え
るため、アルゴンの収率を大幅に悪化させてしまうこと
があった。In particular, in air separation equipment in which a crude argon column is attached to the upper column in order to extract argon, disturbances in the rectification balance in the upper column have a large effect on the argon extraction efficiency, so the argon yield can be significantly reduced. Sometimes it made things worse.

また、上記公報以外にも、いくつかの方法や装置が提案
されているが、いずれも精留塔の状態が変化するため、
各製品ガスの収率をある程度犠牲にして需要変動に対応
しているのが実情である。In addition to the above publications, several methods and devices have been proposed, but all of them change the state of the rectification column, so
The reality is that demand fluctuations are responded to by sacrificing the yield of each product gas to some extent.

そこで、本発明は、精留塔の状態を常に最良の状態に保
ち、各製品ガス、特にアルゴンガスが高収率で得られる
とともに、簡単な装置構成で需要変動に対応することか
できる空気液化分離方法及び装置を提供することを目的
としている。Therefore, the present invention has developed an air liquefaction system that can maintain the rectification column in the best condition, obtain each product gas, especially argon gas, at a high yield, and can respond to demand fluctuations with a simple equipment configuration. The purpose is to provide a separation method and apparatus.

〔課題を解決するための手段〕[Means to solve the problem]

上記した目的を達成するために、本発明の空気液化分離
方法は、原料空気を圧縮し、精製冷却し、精留装置に導
入して、液化精留分離を行い、酸素窒素等を採取する空
気液化分離方法において、製品ガスを、その需要減少時
は、該製品ガス圧送ラインより分岐して、該分岐製品ガ
スを貯留液化空気と熱交換させて液化し、貯留するとと
もに、気化した空気を原料空気ラインに連結した空気循
環ラインへ循環し、需要増大時は、上記循環空気との熱
交換により貯留製品液化ガスを気化して前記製品ガス圧
送ラインへ合流させるとともに、上記熱交換により液化
した循環空気を貯留し、液化しない空気を前記循環ライ
ンへ再循環し、かつ該循環空気量の増減を原料空気吸入
量で吸収する°とともに、前記精留装置に導入する原料
空気量を所定量に維持しつつ製品ガスの需要変動に対応
することを特徴としている。In order to achieve the above object, the air liquefaction separation method of the present invention compresses raw air, purifies and cools it, introduces it into a rectifier, performs liquefaction rectification separation, and extracts oxygen, nitrogen, etc. from the air. In the liquefaction separation method, when the demand for product gas decreases, the product gas is branched from the product gas pressure delivery line, and the branched product gas is liquefied and stored by exchanging heat with stored liquefied air, and the vaporized air is used as a raw material. The stored product liquefied gas is circulated to the air circulation line connected to the air line, and when demand increases, the stored product liquefied gas is vaporized by heat exchange with the above-mentioned circulating air and merged into the above-mentioned product gas pressure delivery line. Storing air, recirculating unliquefied air to the circulation line, and absorbing changes in the amount of circulating air with the intake amount of raw material air, and maintaining the amount of raw material air introduced into the rectifier at a predetermined amount. It is characterized by being able to respond to fluctuations in demand for product gas.

また、本発明の空気液化分離装置は、第１の構成として
、原料空気圧縮機、吸着器等と、主熱交換器、精留塔等
とを備えた精留装置よりなり、空気を液化精留分離して
、酸素、窒素等を採取する空気液化分離装置において、
液化空気貯槽、製品液化ガス貯槽、製品ガス液化器、製
品ガス気化器循環空気圧縮機を設け、原料空気の一部を
分岐して循環空気圧縮機に導入し、該圧縮機を導出した
空気を前記製品ガス気化器を経て液化空気貯槽に導入し
、該液化空気貯槽を導出した空気を前記循環空気圧縮機
へ循環する空気循環系統と、前記液化空気貯槽を導出し
た液化空気を、製品ガス液化器及び空気流量調節弁とを
経て前記空気循環系へ導入する系統と、前記精留装置よ
り導出した製品ガスを製品ガス圧送機を経て需要先に送
出する製品ガスラインと、前記製品ガスを分岐して製品
ガス液化器を経て前記製品液化ガス貯槽へ導入する系統
と、該製品液化ガス貯槽を導出した液化製品ガスを、前
記製品ガス気化器及び製品ガス流量調節弁とを経て前記
製品ガスラインへ合流する系統と、前記製品ガスライン
に設けた圧力調節計からの信号により、前記空気流量調
節弁と製品ガス流量調節弁とを調節し、かつ、原料空気
圧縮機を導出し、精留装置に導入する原料空気ラインに
設けた原料空気流量調節計からの信号により、原料空気
圧縮機の吸入空気量を調節する手段を設けたことを特徴
としている。Moreover, the air liquefaction separation apparatus of the present invention includes a rectification apparatus equipped with a raw air compressor, an adsorber, etc., a main heat exchanger, a rectification column, etc. as a first configuration, and liquefies and purifies air. In air liquefaction separation equipment that distills and collects oxygen, nitrogen, etc.
A liquefied air storage tank, a product liquefied gas storage tank, a product gas liquefier, and a product gas vaporizer are equipped with a circulating air compressor, a part of the raw material air is branched and introduced into the circulating air compressor, and the air discharged from the compressor is an air circulation system that introduces the product gas into a liquefied air storage tank through the product gas vaporizer and circulates the air taken out of the liquefied air storage tank to the circulating air compressor; a system that introduces the product gas into the air circulation system through the air flow control valve and an air flow control valve; a product gas line that sends the product gas derived from the rectification device to a consumer via a product gas pressure feeder; and a product gas line that branches the product gas. and a system for introducing the liquefied product gas into the product liquefied gas storage tank via the product gas liquefier, and a system for introducing the liquefied product gas led out from the product liquefied gas storage tank into the product gas line via the product gas vaporizer and the product gas flow rate control valve. The air flow rate control valve and the product gas flow rate control valve are adjusted based on signals from the pressure regulator installed in the product gas line and the system that merges into the product gas line, and the raw material air compressor is led out, and the rectifier is The present invention is characterized in that means is provided for adjusting the intake air amount of the raw material air compressor based on a signal from a raw material air flow rate controller installed in the raw material air line introduced into the raw material air compressor.

さらに、本発明の空気液化分離装置は、第２の構成とし
て、原料空気圧縮機、吸着器等と、主熱交換器、精留塔
等よりなる精留装置を備え、空気を液化精留分離して、
酸素、窒素等を採取する空気液化分離装置において、液
化空気貯槽、製品液化ガス貯槽、製品ガス液化器、製品
ガス気化器循環空気圧縮機を設け、原料空気の一部を分
岐して循環空気圧縮機に導入し、該圧縮機を導出した空
気を前記製品ガス気化器を経て、かつ該空気の一部を分
岐して該気化器を経ずに液化空気貯槽に導入し、該液化
空気貯槽を導出した空気を前記循環空気圧縮機へ循環す
る空気循環系統と、前記精留装置より導ａした製品ガス
を製品ガス圧送機を経て需要先に送出する製品ガスライ
ンと、前記製品ガスを分岐して製品ガス液化器を経て前
記製品液化ガス貯槽へ導入する製品ガス液化系統と、該
製品液化ガス貯槽を導出した製品ガスを、チェック弁を
介して前記製品ガスラインへ合流する製品気化ガス系統
と、前記製品ガスラインに設けられた圧力調節計からの
信号により、前記空気循環系統の液化空気貯槽の入口に
設けられた空気圧力調節弁及び製品液化ガス貯槽へ導入
する製品液化ガス供給系統の製品液化ガス貯槽入口弁と
を調節し、かつ原料空気圧縮機を導出し、精留装置に導
入する原料空気ラインに設けた原料空気流量調節計から
の信号により、原料空気圧縮機の吸入空気量を調節する
手段を設けたことを特徴としている。Furthermore, the air liquefaction separation apparatus of the present invention is equipped with a rectification apparatus consisting of a raw air compressor, an adsorber, etc., a main heat exchanger, a rectification column, etc. as a second configuration, and the air is liquefied and rectified. do,
Air liquefaction separation equipment that collects oxygen, nitrogen, etc. is equipped with a liquefied air storage tank, a product liquefied gas storage tank, a product gas liquefier, a product gas vaporizer, and a circulating air compressor to branch off a portion of the raw air and compress the circulating air. The air introduced into the machine and taken out from the compressor passes through the product gas vaporizer, and a part of the air is branched and introduced into the liquefied air storage tank without passing through the vaporizer, and the liquefied air storage tank is An air circulation system that circulates the derived air to the circulating air compressor, a product gas line that sends the product gas led from the rectification device to a consumer via a product gas pressure feeder, and a product gas line that branches the product gas. a product gas liquefaction system that introduces the product gas into the product liquefied gas storage tank via the product gas liquefier, and a product vaporized gas system that connects the product gas led out of the product liquefied gas storage tank to the product gas line via a check valve. , the air pressure control valve provided at the inlet of the liquefied air storage tank of the air circulation system and the product of the product liquefied gas supply system to be introduced into the product liquefied gas storage tank according to a signal from the pressure regulator installed in the product gas line. The intake air amount of the raw air compressor is adjusted by adjusting the inlet valve of the liquefied gas storage tank, leading out the raw air compressor, and using the signal from the raw air flow rate controller installed in the raw air line leading to the rectification equipment. It is characterized by the provision of means for adjustment.

〔作　用〕[For production]

従って、製品ガスを需要変動に応じて増減しても、需要
変動に対応する部分を精留装置から独立して運転できる
ので、精留装置からは常に一定量の製品ガス等が導出さ
れるとともに、それに応じた量の原料空気が導入される
のて、精留塔内の精留状態を常に最良の状態に維持する
ことができる。Therefore, even if the product gas is increased or decreased according to demand fluctuations, the part corresponding to the demand fluctuations can be operated independently from the rectifier, so a constant amount of product gas etc. is always drawn out from the rectifier. Since a corresponding amount of feed air is introduced, the rectification condition in the rectification column can always be maintained in the best condition.

〔実施例〕〔Example〕

以下、本発明を、図面に示す空気液化分離装置の一実施
例を参照しながら、各気液の流れに基づいて、さらに詳
細に説明する。Hereinafter, the present invention will be explained in more detail based on the flow of each gas and liquid, with reference to an embodiment of the air liquefaction separation device shown in the drawings.

まず、第１図において、原料空気は、原料空気圧縮機１
で圧縮され、冷却装置２を経て吸着器３に導入され、含
有する水分や炭酸ガス等の不純物が除去された後、導管
４からコールドボックス５に導入される。コールドボッ
クス５に導入された原料空気は、周知の液化精留分離手
段、即ち、主熱交換器、精留塔、生凝縮蒸発器１膨張タ
ービン等を備えた精留手段により精留され、酸素、窒素
アルゴン等の製品ガスと廃ガスとに分離する。First, in FIG. 1, raw air is supplied to the raw air compressor 1.
The compressed air is compressed and introduced into an adsorber 3 via a cooling device 2, and after removing impurities such as water and carbon dioxide contained therein, it is introduced into a cold box 5 through a conduit 4. The feed air introduced into the cold box 5 is rectified by a well-known liquefaction rectification separation means, that is, a rectification means equipped with a main heat exchanger, a rectification column, a biocondensing evaporator 1 expansion turbine, etc. , separated into product gas such as nitrogen argon and waste gas.

コールドボックス５内で得られた製品酸素ガスは、主熱
交換器で常温に温度回復して導管６に導出される。この
製品酸素ガスの抜出し量は、標準使用量に応して設定さ
れるもので、常時一定量か導出されている。従って、酸
素ガスの需要量と導出量が同一の場合には、製品酸素ガ
スは、製品ガス圧送機７て所定圧力に昇圧された後、製
品ガスライン８から需要先に送出される。尚、製品ガス
ライン８には、僅かな需要変動を吸収するためのガスホ
ルダー９が付設されている。The product oxygen gas obtained in the cold box 5 is returned to normal temperature in the main heat exchanger and is then led out to the conduit 6. The amount of product oxygen gas to be extracted is set according to the standard usage amount, and a constant amount is always derived. Therefore, when the demand amount and the derived amount of oxygen gas are the same, the product oxygen gas is pressurized to a predetermined pressure by the product gas pump 7 and then sent out from the product gas line 8 to the demand destination. Note that a gas holder 9 is attached to the product gas line 8 to absorb slight fluctuations in demand.

そして、製品酸素ガスの需要変動に対応するため、この
空気液化分離装置には、液化空気貯槽１０、液化酸素貯
槽１１．製品ガス液化器１２．製品ガス気化器１３．循
環空気圧縮機１４を設けるとともに、これらの需要変動
対応用の機器と上記原料空気圧縮機１．吸着器３等から
なる原料空気ライン及びコールドボックス５内の主熱交
換器複精留塔等からなる液化精留装置とを下記の各系統
で有機的に接続している。In order to respond to fluctuations in demand for product oxygen gas, this air liquefaction separation device includes a liquefied air storage tank 10, a liquefied oxygen storage tank 11. Product gas liquefier 12. Product gas vaporizer 13. In addition to providing a circulating air compressor 14, equipment for responding to these demand fluctuations and the raw material air compressor 1. A feed air line consisting of an adsorber 3 and the like and a liquefaction rectification device consisting of a main heat exchanger, double rectification column, etc. in the cold box 5 are organically connected through the following systems.

（１）吸着器３を導出した原料空気の一部を分岐して前
記循環空気圧縮機１４に導入する導管２０゜該循環空気
圧縮機１４を導出した空気を、チェック弁２１を介して
前記製品ガス気化器１３に導入する導管２２　該製品ガ
ス気化器１３で液化した液化空気を前記液化空気貯槽１
０に導入する導管２３、該液化空気針＋！１０を導出し
た空気を、製品ガス気化器１３を介して熱回収後に前記
循環空気圧縮機１４に循環させる導管２４を有する空気
循環系統、及び該空気循環系統に設けられ、循環空気の
流量を制御する流量調節器２５ａと調節弁２５ｂ、該系
統の圧力を制御する圧力調節器２６ａと調節弁２６ｂ０ （２）前記液化空気貯槽１ｏを導出した液化空気を、前
記製品ガス液化器１２に導入する導管３゜該製品ガス液
化器１２て気化した空気を上記空気循環系へ導入する導
管３１を有する液化空気の循環系統、及び該液化空気の
循環系統に設けられ、前記製品ガスライン８に設けられ
た圧力調節器８ａにより作動する調節弁８ｂ０ （３）前記精留装置より導出した製品酸素ガスを需要先
に送出する製品ガスライン８がら分岐し、製品酸素ガス
をチェック弁４０を介して前記製品ガス液化器１２に導
入する導管４１．該製品ガス液化器１２て液化した液化
酸素を前記液化酸素貯槽１１に導入する導管４２を有す
る製品ガス液化系統。(1) A conduit 20 for branching a part of the raw air taken out of the adsorber 3 and introducing it into the circulating air compressor 14. A conduit 22 introducing the gas vaporizer 13 The liquefied air liquefied in the product gas vaporizer 13 is transferred to the liquefied air storage tank 1
0, the liquefied air needle +! an air circulation system having a conduit 24 for circulating the air from which the air is extracted through the product gas vaporizer 13 to the circulating air compressor 14 after heat recovery; and an air circulation system provided in the air circulation system to control the flow rate of the circulating air. a flow rate regulator 25a and a regulating valve 25b for controlling the pressure of the system; a pressure regulator 26a and a regulating valve 26b0 for controlling the pressure of the system; (2) a conduit for introducing the liquefied air led out of the liquefied air storage tank 1o into the product gas liquefier 12; 3. A liquefied air circulation system having a conduit 31 for introducing the air vaporized by the product gas liquefier 12 into the air circulation system, and a liquefied air circulation system provided in the liquefied air circulation system and provided in the product gas line 8. A control valve 8b0 operated by a pressure regulator 8a (3) The product gas line 8 that sends the product oxygen gas derived from the rectification device to the consumer is branched, and the product oxygen gas is transferred to the product gas via the check valve 40. Conduit 41 leading into the liquefier 12. A product gas liquefaction system having a conduit 42 for introducing liquefied oxygen liquefied by the product gas liquefier 12 into the liquefied oxygen storage tank 11.

（４）上記液化酸素貯槽１１を導出した液化酸素を、前
記製品ガス気化器１３に導入する導管５０該製品ガス気
化器１３で気化した酸素ガスを前記製品ガスライン８に
合流させる導管５１を有する製品ガス気化系統、及び該
製品ガス気化系統に設けられ、前記製品ガスライン８に
設けられた圧力調節器８ａにより作動する調節弁３ｃ。(4) It has a conduit 50 for introducing the liquefied oxygen discharged from the liquefied oxygen storage tank 11 into the product gas vaporizer 13 and a conduit 51 for introducing the oxygen gas vaporized in the product gas vaporizer 13 into the product gas line 8. A product gas vaporization system, and a control valve 3c provided in the product gas vaporization system and operated by a pressure regulator 8a provided in the product gas line 8.

（５）上記液化酸素貯槽１１内を所定圧力に保持するた
め、該液化酸素貯槽１１から液化酸素を導出し、製品ガ
ス気化器１３を介して再び液゛化酸素貯槽１１に戻る導
管６０及び導管６１．液化酸素貯槽１１内の気相の酸素
ガスを製品ガス液化器１２を介して製品ガスライン８に
合流させる導管６２及び導管６３、及び液化酸素貯槽１
１内の気相の圧力を検出する圧力調節器６４ａと、該圧
力調節器６４ａにより作動する調節弁６４ｂ及び調節弁
６４ｃ０ さらに上記各系統の作動に応して原料空気の圧縮量を調
節し、コールドボックス５内の各機器、特に精留塔の運
転状態を常時一定に保持するため、原料空気ラインの導
管４には流量調節器４ａが設けられるとともに、原料空
気圧縮機１には、風量調節器又は吸入ガイドベーン４ｂ
が設けられている。また、前記製品ガス気化器１３の導
出側に設けた調節弁２５ｂには、ＪＴ弁（ジュールトム
ソン弁）か用いられている。(5) In order to maintain the inside of the liquefied oxygen storage tank 11 at a predetermined pressure, a conduit 60 and a conduit that lead out liquefied oxygen from the liquefied oxygen storage tank 11 and return it to the liquefied oxygen storage tank 11 via the product gas vaporizer 13. 61. A conduit 62 and a conduit 63 that connect the gas phase oxygen gas in the liquefied oxygen storage tank 11 to the product gas line 8 via the product gas liquefier 12, and the liquefied oxygen storage tank 1
a pressure regulator 64a that detects the pressure of the gas phase in the pressure regulator 64a; a regulating valve 64b and a regulating valve 64c0 operated by the pressure regulator 64a; In order to keep the operating state of each device in the cold box 5 constant, especially the rectification column, a flow rate regulator 4a is provided in the conduit 4 of the feed air line, and a flow rate regulator 4a is provided in the feed air compressor 1. device or suction guide vane 4b
is provided. Furthermore, a JT valve (Joule-Thomson valve) is used as the control valve 25b provided on the outlet side of the product gas vaporizer 13.

次に、上記構成の需要変動対応型の空気液化分離装置の
運転方法を説明する。Next, a method of operating the air liquefaction separator having the above-mentioned structure that can respond to demand fluctuations will be explained.

まず、製品酸素ガスの需要量が減少した場合には、製品
ガス圧送機７か所定容量で運転されることから、需要減
少量に応して製品ガスライン８内の圧力が上昇する。そ
して、該製品ガスライン８内の圧力が前記チェック弁４
０の設定圧力よりも上昇すると、該製品ガスライン８内
の余剰の製品酸素ガスは、チェック弁４０から導管４１
を経て製品ガス液化器１２に導入される。同時に、製品
ガスライン８に設けられた圧力調節器８ａが作動して調
節弁８ｂが開き、液化空気貯槽１０に貯留されている液
化空気が導管３０に導圧され、製品ガス液化器１２に導
入される。これにより、製品ガス液化器１２ては、製品
酸素ガスと液化空気とか熱交換を行い、液化した液化製
品酸素ガスは、導管４２から液化酸素貯１１１：ｌに導
入されて貯留される。一方、該熱交換により気化した空
気は、導管３１から前記循環空気圧縮機］４の吸入側に
戻るが、循環空気圧縮機１４の吐出側の流量及び圧力か
前記流量調節器２５ａと圧力調節器２６ａとにより制御
されているため、該循環系で余剰となる空気は、導管２
０から導管４に合流し、コールドボックス５に導入され
る。そして、このままでは、該導管４を流れる空気量が
増大するため、該導管４に設けられた流量調節器４ａに
より原料空気圧縮機１の吸入ガイドベーン４ｂが作動し
、上記合流空気量に相当する分、原料空気圧縮機１の吸
入空気量を減少させ、コールドボックス５に導入される
原料空気量を一定に保つようにする。First, when the demand for product oxygen gas decreases, the product gas pressure feeder 7 is operated at a predetermined capacity, so the pressure in the product gas line 8 increases in accordance with the decrease in demand. Then, the pressure in the product gas line 8 is reduced to the check valve 4.
When the pressure rises above the set pressure of
The product gas is then introduced into the liquefier 12. At the same time, the pressure regulator 8a provided in the product gas line 8 is activated to open the control valve 8b, and the liquefied air stored in the liquefied air storage tank 10 is pressured into the conduit 30 and introduced into the product gas liquefier 12. be done. Thereby, the product gas liquefier 12 performs heat exchange between the product oxygen gas and the liquefied air, and the liquefied product oxygen gas is introduced from the conduit 42 into the liquefied oxygen storage 111:l and stored therein. On the other hand, the air vaporized by the heat exchange returns to the suction side of the circulating air compressor 4 from the conduit 31, but the flow rate and pressure on the discharge side of the circulating air compressor 14 are different from the flow rate regulator 25a and the pressure regulator. 26a, the surplus air in the circulation system is controlled by the conduit 26a.
0 joins the conduit 4 and is introduced into the cold box 5. If this continues, the amount of air flowing through the conduit 4 will increase, so the intake guide vane 4b of the raw material air compressor 1 is operated by the flow rate regulator 4a provided in the conduit 4, and the amount of air flowing through the conduit 4 is increased. The intake air amount of the raw material air compressor 1 is reduced by 20 minutes, and the amount of raw material air introduced into the cold box 5 is kept constant.

このように、製品ガス圧送機７を所定容量で運転しなが
ら製品ガスライン８の余剰製品酸素ガスを液化して貯留
するとともに、該酸素ガスを液化するために生した空気
を循環させ、あるいは原料空気に合流させて、その分の
原料空気吸入量を減少させることにより、精留分離部に
導入する原料空気量及び導出する製品酸素ガス員を一定
に保ったまま、製品ガスライン８から需要先に送給する
製品酸素ガス量を減少させることができる。In this way, while operating the product gas pressure feeder 7 at a predetermined capacity, surplus product oxygen gas in the product gas line 8 is liquefied and stored, and the air produced to liquefy the oxygen gas is circulated or the raw material By combining with the air and reducing the intake amount of raw material air, the amount of raw material air introduced into the rectification separation section and the amount of product oxygen gas taken out are kept constant, and the product gas line 8 is connected to the demand destination. It is possible to reduce the amount of product oxygen gas delivered to the product.

尚、この時、循環空気圧縮機１４は、運転状態でも停止
状態でも良く、運転状態の場合には、略一定量の空気か
循環し、液化空気を生成するとともに調節弁２５ｂのＪ
Ｔ効果により寒冷補給が行われる。また、循環空気圧縮
機１４の停止状態では、チェック弁２１及び圧力調節器
２６ａと調節弁２６ｂの働きにより、液化空気貯槽１ｏ
内が所定の圧力に保持されている。At this time, the circulating air compressor 14 may be in an operating state or a stopped state, and in the case of an operating state, a substantially constant amount of air is circulated to generate liquefied air and the control valve 25b is
Cold supplementation occurs due to the T effect. In addition, when the circulating air compressor 14 is in a stopped state, the check valve 21, the pressure regulator 26a, and the regulating valve 26b operate to control the liquefied air storage tank 1o.
The inside is maintained at a predetermined pressure.

また、製品酸素ガスの需要量が増大した場合には、製品
ガス圧送機７が所定容量で運転されることから、需要増
大量に応じて製品ガスライン８内の圧力が低下し、製品
ガスライン８に設けられた圧力調節器８ａが作動して調
節弁８ｃが開く。これにより、液化酸素貯槽１１に貯留
されている液化酸素が導管５０に導出され、製品ガス気
化器１３に導入される。この液化酸素は、循環空気圧縮
機１４で昇圧した空気と熱交換して気化し、導管５１．
調節弁８Ｃを経て製品ガスライン８に導入され、精留分
離部から導出される製品酸素ガスと合流して需要先に送
給される。In addition, when the demand for product oxygen gas increases, the product gas pressure feeder 7 is operated at a predetermined capacity, so the pressure in the product gas line 8 decreases in accordance with the increased demand, and the product gas line The pressure regulator 8a provided at 8 operates and the regulating valve 8c opens. As a result, the liquefied oxygen stored in the liquefied oxygen storage tank 11 is led out to the conduit 50 and introduced into the product gas vaporizer 13. This liquefied oxygen exchanges heat with the air pressurized by the circulating air compressor 14 and vaporizes, and is vaporized through the conduit 51.
It is introduced into the product gas line 8 via the control valve 8C, merges with the product oxygen gas derived from the rectification separation section, and is sent to the consumer.

この時、液化酸素貯槽１１から導出する液化酸素の圧力
は、圧力調節器６４ａの作動て調節弁６４ｂが開き、導
管６０を介して液化酸素を製品ガス気化器１３に導入し
、気化させて導管６１から液化酸素貯槽１１に戻すこと
により所定以上の圧力に保持することができる。尚、液
化酸素貯槽１１内の圧力が過剰に上昇した場合には、圧
力調節器６４ａの作動で調節弁６４ｃが開き、導管６２
゜製品ガス液化器１２．導管６３を介して製品ガスライ
ン８に導出する。At this time, the pressure of the liquefied oxygen led out from the liquefied oxygen storage tank 11 is adjusted by operating the pressure regulator 64a and opening the control valve 64b, introducing the liquefied oxygen into the product gas vaporizer 13 through the conduit 60, vaporizing it, and then passing it through the conduit. By returning the liquefied oxygen from 61 to the liquefied oxygen storage tank 11, the pressure can be maintained at a predetermined level or higher. Note that if the pressure inside the liquefied oxygen storage tank 11 rises excessively, the pressure regulator 64a is operated to open the control valve 64c, and the conduit 62
゜Product gas liquefier 12. It is led out to the product gas line 8 via a conduit 63.

同様に、液化空気貯槽１０内の加圧も、該貯槽１０から
導出した液化空気を製品ガス液化器１２で気化した後、
該貯Ｗ１１０へ導入することて行っても良い。また、こ
れらの加圧蒸発器方式による加圧を、熱源を大気に求め
る通常の加圧蒸発器とすることも可能である。Similarly, the pressure inside the liquefied air storage tank 10 is increased after the liquefied air drawn out from the storage tank 10 is vaporized in the product gas liquefier 12.
It may also be carried out by introducing it into the storage W110. Moreover, the pressurization by these pressurized evaporator systems can also be performed using a normal pressurized evaporator that uses the atmosphere as a heat source.

一方、製品ガス気化器１３で液化酸素を気化させ、調節
弁２５ｂてフラッシュすることにより一部が液化した空
気は、ＪＴ寒冷を発生させるとともに、液化空気は液化
空気貯１１０に貯留され、液化しなかった空気は、導管
２４から循環空気圧縮機１４の吸入側に循環する。また
、空気循環系内の空気の一部が液化して空気の循環量か
減少した場合には、吸着器３を導出した原料空気の一部
が導管２０から循環空気圧縮機１４に吸引される。On the other hand, the air partially liquefied by vaporizing liquefied oxygen in the product gas vaporizer 13 and flushing it with the control valve 25b generates JT cold, and the liquefied air is stored in the liquefied air storage 110 and liquefied. The remaining air is circulated through conduit 24 to the suction side of circulating air compressor 14. In addition, when a part of the air in the air circulation system is liquefied and the amount of air circulation is reduced, a part of the raw material air led out of the adsorber 3 is sucked into the circulating air compressor 14 from the conduit 20. .

この時、導管４に設けられた流量調節器４ａにより原料
空気圧縮機１の吸入ガイトヘーン４ｂか作動し、上記吸
入空気量に相当する分、原料空気圧縮機１の吸入空気量
を増大させ、コールドボックス５に導入される原料空気
量を一定に保つようにする。At this time, the intake guide 4b of the raw material air compressor 1 is operated by the flow rate regulator 4a provided in the conduit 4, and the amount of intake air of the raw material air compressor 1 is increased by an amount corresponding to the above intake air amount. The amount of raw air introduced into the box 5 is kept constant.

また、前記循環空気圧縮機１４を需要増大時のみ運転す
る場合は、調節弁８ｃか開く前に、圧力調節器８ａ等の
指令により循環空気圧縮機１４を作動させ、次いて調節
弁８Ｃを開くようにし、調節弁８Ｃを閉した後循環空気
圧縮機１４を停止させるようにする。If the circulating air compressor 14 is operated only when demand increases, the circulating air compressor 14 is operated by a command from the pressure regulator 8a, etc. before the regulating valve 8c is opened, and then the regulating valve 8C is opened. After closing the control valve 8C, the circulating air compressor 14 is stopped.

このように、本実施例に示す空気液化分離装置は、製品
酸素ガスの需要変動に応して各調節器か作動し、製品酸
素ガスの液化貯留及び液化酸素の気化を行い、該酸素の
液化及び気化を精留分離部と独立して運転される空気循
環系の空気で行うとともに、該空気循環系の空気量に応
じて原料空気圧縮機１における原料空気吸入量を調節し
、精留分離部に導入する原料空気量を一定に保ち、また
、製品ガス圧送機７を所定容量で運転し、精留分離部か
ら導出する製品酸素ガス量を一定に保つので、精留分離
部を最も効率の良い状態で運転させることかできる。こ
の需要変動に対応して回転機の起動７停止を必要としな
いこと、酸素圧縮機は一定運転が可能なことは、装置運
転上、装置構成上優れた点である。In this way, the air liquefaction separation device shown in this example operates each regulator in response to fluctuations in demand for product oxygen gas, liquefies and stores product oxygen gas, and vaporizes liquefied oxygen. The vaporization is performed using air from an air circulation system that is operated independently of the rectification separation section, and the amount of feed air taken into the feed air compressor 1 is adjusted according to the amount of air in the air circulation system. The amount of raw material air introduced into the rectification section is kept constant, and the product gas pressure feeder 7 is operated at a predetermined capacity to keep the amount of product oxygen gas drawn out from the rectification separation section constant, making the rectification separation section most efficient. It is possible to operate the vehicle in good condition. The fact that there is no need to start or stop the rotating machine in response to demand fluctuations, and that the oxygen compressor can be operated at a constant rate, is advantageous in terms of equipment operation and equipment configuration.

ここで、前記構成の空気液化分離装置において、製品酸
素ガスの平均需要量が約２６００ＯＮｒｒｉ’／ｈ、需
要変動幅が３１０００〜１２０００　　Ｎｒｒ？／ｈ、
圧力変動幅が１７〜２５ｋｇ／ｃｄＧの設備の操作条件
を計算した結果を説明する。Here, in the air liquefaction separation apparatus having the above configuration, the average demand amount of the product oxygen gas is approximately 2600 ONrri'/h, and the demand fluctuation range is 31000 to 12000 Nrr? /h,
The results of calculating the operating conditions for equipment with a pressure fluctuation range of 17 to 25 kg/cdG will be explained.

ます、原料空気圧縮機１における原料空気吸入量は、約
１３２０００〜１１５０００　Ｎボ／ｈの間で自動的に
増減されるか、圧力は５．３ｋｇ／ｃ４Ｇに保たれる。First, the feed air intake amount in the feed air compressor 1 is automatically increased or decreased between about 132,000 to 115,000 Nbo/h, or the pressure is maintained at 5.3 kg/c4G.

また、コールドボックス５からは、製品酸素ガス２６０
００　　Ｎｒｒ？／ｈか一定量採取され、製品ガス圧送
機７も常時２６０００　　Ｎｒｒ？／ｈて運転される。In addition, from the cold box 5, product oxygen gas 260
00 Nrr? A certain amount of gas is sampled per hour, and the product gas pressure feeder 7 also constantly collects 26,000 Nrr? /h is operated.

さらに循環空気圧縮機］４は、１２０００　ＮｒｒＩｌ
／　ｈ、　４０）ｃｇ／ｃｄＧて一定運転される。Furthermore, circulating air compressor] 4 is 12000 NrrIl
/h, 40) cg/cdG constant operation.

このような状態で前記需要変動に対応して運転した時の
製品酸素ガス基準の電力原単位は、０５７　ｋｗｌｌ／
　Ｎｒｒｉ’であり、さらに精留分離部にアルゴン塔を
付設し、アルゴンを採取したときのアルコン収率は８６
％であった。When operating under these conditions in response to the above demand fluctuations, the electricity consumption rate based on the product oxygen gas is 057 kwll/
Furthermore, when an argon column is attached to the rectification separation section and argon is collected, the alkone yield is 86
%Met.

第２図は、本発明の他の実施例を示すもので、需要減少
時に余剰となる製品酸素ガスを、熱交換器７０て顕熱領
域での熱交換により液化点付近の温度に降温させた後に
液化空気貯槽１０内の液化器７１に導入して液化し、該
酸素ガスの液化による主として潜熱の熱交換で液化空気
を気化させるように構成するとともに、製品酸素ガスの
需要増大時には、循環空気圧縮機１４から吐出された循
環空気を、熱交換器７０で液化点付近の温度に降温させ
た後に液化酸素貯槽１１内の液化器（製品ガス気化器）
７３に導入して液化し、該空気の液化による主として潜
熱の熱交換で液化酸素を気化させるように構成したもの
である。FIG. 2 shows another embodiment of the present invention, in which product oxygen gas that becomes surplus when demand decreases is cooled to a temperature near the liquefaction point by heat exchange in the sensible heat region using a heat exchanger 70. The liquefied air is then introduced into the liquefier 71 in the liquefied air storage tank 10 and liquefied, and the liquefied air is vaporized mainly by heat exchange of latent heat due to the liquefaction of the oxygen gas.When the demand for product oxygen gas increases, the circulating air is After the circulating air discharged from the compressor 14 is cooled down to a temperature near the liquefaction point in the heat exchanger 70, it is transferred to a liquefier (product gas vaporizer) in the liquefied oxygen storage tank 11.
73 to liquefy the air, and the liquefied oxygen is vaporized mainly by heat exchange of latent heat due to the liquefaction of the air.

装置の構成は、第１図の実施例と同様であるか、各系統
の概略は次の通りである。尚、本実施例においては、前
記第１図に示した実施例と同一要素のものには同一符号
を付して、その詳細な説明は省略する。The configuration of the device is the same as the embodiment shown in FIG. 1, and the outline of each system is as follows. In this embodiment, the same elements as those in the embodiment shown in FIG. 1 are given the same reference numerals, and detailed explanation thereof will be omitted.

（１）循環空気圧縮機１４を導出した空気を熱交換器７
０に導入し、液化点付近まで冷却して導出し、液化空気
貯１１０に導入する導管２３．該液化空気貯槽１０を導
出した空気を前記熱交換器７０を経て冷熱回収後、前記
循環空気圧縮機１４に循環させる導管２４を介する空気
循環系統、及び該空気循環系統に設けられ、その流量と
圧力を制御する流量調節器２５ａと調節弁２５ｂ１圧力
調節器２６ａと一節弁２６ｂ０、 （２）上記循環空気用の導管２２または導管２３より分
岐し、導管７２を経て液化酸素貯槽１１内に設けられた
製品ガス気化器（循環空気液化器）７３、該製品ガス気
化器７３で液化した空気を導管７４で導出し、後述する
圧力調節計８８からの信号で作動する空気圧力調節弁８
ｅによって降圧した後、前記液化空気貯Ｎ１１０へ導入
する系統。(1) The air led out from the circulating air compressor 14 is transferred to the heat exchanger 7
A conduit 23. An air circulation system is provided in the air circulation system through a conduit 24 for recovering cold heat from the air led out of the liquefied air storage tank 10 through the heat exchanger 70 and circulating it to the circulating air compressor 14, and A flow rate regulator 25a and a regulating valve 25b1 for controlling pressure; a pressure regulator 26a and a one-way valve 26b0; A product gas vaporizer (circulating air liquefier) 73, the air liquefied in the product gas vaporizer 73 is led out through a conduit 74, and an air pressure control valve 8 is operated by a signal from a pressure regulator 88, which will be described later.
A system for introducing the liquefied air into the liquefied air storage N110 after the pressure is lowered by e.

（３）前記製品ガスライン８から分岐し、導管４１によ
り前記鵡交換器７０を紅白し、前記液化空気貯槽１０内
に設けられた製品ガス液化器（液化空気気化器）７１て
液化した製品ガスを、前記製品ガスライン８の圧力を検
出して該圧力を調節する圧力調節計８８からの信号によ
り作動する調節弁（製品液化ガス貯槽入口弁）８ｄを経
て前記液化酸素貯槽１１に導入する導管４２からなる製
品ガス液化系統。(3) The product gas is branched from the product gas line 8 and liquefied in the product gas liquefier (liquefied air vaporizer) 71 provided in the liquefied air storage tank 10 by red-whitening the mass exchanger 70 through the conduit 41. A conduit that is introduced into the liquefied oxygen storage tank 11 via a control valve (product liquefied gas storage tank inlet valve) 8d that is operated by a signal from a pressure regulator 88 that detects the pressure of the product gas line 8 and adjusts the pressure. Product gas liquefaction system consisting of 42 parts.

（４）該液化酸素貯槽１１より製品気化ガスを導出し、
チェック弁８０を介して前記製品ガスライン８へ導入す
る導管６２．６３よりなる系統。(4) Deriving the product vaporized gas from the liquefied oxygen storage tank 11,
A system consisting of conduits 62, 63 leading into said product gas line 8 via a check valve 80.

（５）上記液化酸素貯槽１１内を所定圧力に保持するた
めの圧力調節計６４ａと、上記導管６３より分岐した導
管６５に設けられ、該圧力調節計６４ａよりの信号で作
動する調節弁６４ｄ０この構成による需要変動対応運転
は次の通りである。(5) A pressure regulator 64a for maintaining the inside of the liquefied oxygen storage tank 11 at a predetermined pressure, and a control valve 64d0 provided in a conduit 65 branched from the conduit 63 and operated by a signal from the pressure regulator 64a. The operation to respond to demand fluctuations based on the configuration is as follows.

製品ガスライン８に設けた圧力調節器８ａは、酸素ガス
の需要変動に応じて変化するこのラインの圧力変動を検
出して信号を発し、これにより調節弁８ｄ、８ｅの開閉
を制御する。即ち、需要が減少した場合には、調節弁８
ｄが開き、余剰の製品酸素ガスか導管４１を介して液化
器７１に導入され、温度差をつけるべく設定された該液
化器７１の内外の圧力差により酸素ガスが液化するとと
もに、液化空気貯槽１０内の液化空気が気化し、気化し
た空気か導管２４から循環空気圧縮機１４の吸入側に循
環される。一方、液化した酸素ガスは液化酸素貯槽１１
に導入される。A pressure regulator 8a provided in the product gas line 8 detects pressure fluctuations in this line that change according to fluctuations in the demand for oxygen gas and issues a signal, thereby controlling the opening and closing of the regulating valves 8d and 8e. That is, when the demand decreases, the control valve 8
d is opened, excess product oxygen gas is introduced into the liquefier 71 via the conduit 41, and the oxygen gas is liquefied due to the pressure difference between the inside and outside of the liquefier 71, which is set to create a temperature difference, and the liquefied air storage tank The liquefied air within 10 is vaporized and the vaporized air is circulated through conduit 24 to the suction side of circulating air compressor 14. On the other hand, the liquefied oxygen gas is stored in the liquefied oxygen storage tank 11.
will be introduced in

また、需要が増大した場合には、前記製品ガスライン８
の圧力か下かり、調節弁８ｅが開いて循環空気を前記液
化酸素貯槽１１内の液化器７３に導入して液化酸素を気
化させ、気化した酸素ガスをチェック弁８０を介して製
品ガスライン８に合流させるとともに、空気を調節弁８
ｅてフラッシュさせ、液化した空気を液化空気貯槽１０
に貯留し、液化しなかった空気を導管２４．調節弁２６
ｂを介して循環空気圧縮機１４の吸入側に循環させる。In addition, if demand increases, the product gas line 8
When the pressure of At the same time, the air is passed through the control valve 8.
e and flush the liquefied air to the liquefied air storage tank 10.
The unliquefied air stored in the conduit 24. Control valve 26
b to the suction side of the circulating air compressor 14.

また、圧力調節計６４．ａは、液化酸素貯槽１１の内圧
を一定の設定圧に保つもので、該調節計６４ａからの信
号により調節弁６４ｄを開閉して、槽内か所定圧より高
くなった場合には、系外に酸素ガスを放出する。液化酸
素貯槽１１の設定圧は、例えば、前記製品ガスライン８
の圧力が、上限２５ｋｇ／ｃ４Ｇ、下限１７ｋｇ／ｃＪ
ＧＯ間を変動する場合には、２０ｋｇ／ｃｄＧ程度に設
定する。In addition, the pressure regulator 64. A is used to maintain the internal pressure of the liquefied oxygen storage tank 11 at a constant set pressure.The control valve 64d is opened and closed in response to a signal from the controller 64a, and when the internal pressure in the tank becomes higher than a predetermined pressure, the pressure is removed from the system. releases oxygen gas. The set pressure of the liquefied oxygen storage tank 11 is, for example,
The pressure is upper limit 25kg/c4G, lower limit 17kg/cJ
When changing between GOs, it is set to about 20 kg/cdG.

また、上記両実施例においては、製品ガスとして酸素ガ
スを挙げて説明したが、窒素ガスの場合も略同じ構成で
需要変動に対応することができる。Furthermore, in both of the above embodiments, oxygen gas was used as the product gas, but the same configuration can be used to respond to demand fluctuations in the case of nitrogen gas as well.

さらに、製品ガスライン８及び原料空気系統に接続する
導管２０を複数の精留分離部又は空気液化分離装置に接
続することも可能であり、需要減少時や、需要変動幅が
小さく通常のガスホルダー９で吸収できるような時には
、精留分離部に関係なく需要変動対応部分のみを完全に
止めることができる。逆に需要変動対応部分のみの運転
停止も可能である。Furthermore, it is also possible to connect the conduit 20 that connects to the product gas line 8 and the feed air system to multiple rectification separation units or air liquefaction separation equipment, so that it can be used when demand is decreasing, or when demand fluctuations are small and the conduit 20 is connected to a normal gas holder. 9, it is possible to completely stop only the demand fluctuation response section, regardless of the rectification separation section. Conversely, it is also possible to shut down only the part that responds to demand fluctuations.

加えて、空気循環系統において、液化酸素と熱交換した
後の循環空気をＪＴ弁を介して液化空気貯槽に導入する
ように構成することにより、侵入熱に対する寒冷補給を
行えるので、膨張タービンのような複雑な機器を設ける
必要が無くなる。また、液化酸素貯槽に、系内に配置し
た製品ガス気化器のような熱交換器を用いた加圧系統を
設けることにより、加圧用のポンプを設ける必要が無く
なるとともに寒冷損失も無くすことができる。In addition, by configuring the air circulation system so that the circulating air after heat exchange with the liquefied oxygen is introduced into the liquefied air storage tank via the JT valve, it is possible to replenish the intruding heat with cold air, so it can be used like an expansion turbine. There is no need to install complicated equipment. Additionally, by providing the liquefied oxygen storage tank with a pressurization system that uses a heat exchanger such as a product gas vaporizer placed within the system, it is possible to eliminate the need for a pressurization pump and also eliminate cold loss. .

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明によれば、空気液化分離装
置の分離精留部に変動を与えることなく製品ガスの需要
変動に対応することができるため、精留効率、製品収率
を最良の状態にてき、製品のコスト、動力原単位を低減
することができる。また、需要変動に対応する部分に膨
張タービンや冷凍機等の機器を設置する必要がないので
、設備コストの低減とともに、動力費や保守費の低減も
図れ、また、装置の信頼性、運転性にも優れている。As explained above, according to the present invention, it is possible to respond to fluctuations in demand for product gas without causing fluctuations in the separation and rectification section of the air liquefaction separation device, thereby achieving the best rectification efficiency and product yield. As a result, product costs and power consumption can be reduced. Additionally, since there is no need to install equipment such as expansion turbines or refrigerators in areas that respond to demand fluctuations, equipment costs can be reduced, as well as power and maintenance costs.In addition, equipment reliability and operability can be improved. It is also excellent.

特に、粗アルゴン塔を付設した空気分離装置においては
、上部塔の状態を一定に保つことか粗アルゴンの収率を
高める大きな要因であるので、本発明の方法及び装置は
、酸素及び／又は窒素の需要変動に効率よく対応すると
ともに、アルゴンも同時に効率よく採取できるので、各
種製品ガスをより低置に得ることか可能となる。In particular, in an air separation device equipped with a crude argon column, maintaining the condition of the upper column constant is a major factor in increasing the yield of crude argon. In addition to efficiently responding to demand fluctuations, argon can also be efficiently extracted at the same time, making it possible to obtain various product gases from lower locations.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の空気分離装置の一実施例を示す系統図
、第２図は本発明の他の実施例を示す系統図である。 １・・・原料空気圧縮機　　５・・コールドボックス７
・・製品ガス圧送機　　８・・・製品ガスライン１０・
・・液化空気貯槽 １２・・・製品ガス液化器 １４・・・循環空気圧縮機FIG. 1 is a system diagram showing one embodiment of the air separation apparatus of the present invention, and FIG. 2 is a system diagram showing another embodiment of the invention. 1... Raw material air compressor 5... Cold box 7
...Product gas pressure feeder 8...Product gas line 10.
...Liquefied air storage tank 12...Product gas liquefier 14...Circulating air compressor

Claims (1)

【特許請求の範囲】 １、原料空気を圧縮し、精製冷却し、精留装置に導入し
て、液化精留分離を行い、酸素、窒素等を採取する空気
液化分離方法において、製品ガスを、その需要減少時は
、該製品ガス圧送ラインより分岐して、該分岐製品ガス
を貯留液化空気と熱交換させて液化し、貯留するととも
に、気化した空気を原料空気ラインに連結した空気循環
ラインへ循環し、需要増大時は、上記循環空気との熱交
換により貯留製品液化ガスを気化して前記製品ガス圧送
ラインへ合流させるとともに、上記熱交換により液化し
た循環空気を貯留し、液化しない空気を前記循環ライン
へ再循環し、かつ該循環空気量の増減を原料空気吸入量
で吸収するとともに、前記精留装置に導入する原料空気
量を所定量に維持しつつ製品ガスの需要変動に対応する
ことを特徴とする需要変動に適した空気液化分離方法。 ２、上記製品ガスが酸素ガス及び／又は窒素ガスである
ことを特徴とする請求項１記載の需要変動に適した空気
液化分離方法。 ３、原料空気圧縮機、吸着器等と、主熱交換器、精留塔
等とを備えた精留装置よりなり、空気を液化精留分離し
て、酸素、窒素等を採取する空気液化分離装置において
、液化空気貯槽、製品液化ガス貯槽、製品ガス液化器、
製品ガス気化器、循環空気圧縮機を設け、原料空気の一
部を分岐して循環空気圧縮機に導入し、該圧縮機を導出
した空気を前記製品ガス気化器を経て液化空気貯槽に導
入し、該液化空気貯槽を導出した空気を前記循環空気圧
縮機へ循環する空気循環系統と、前記液化空気貯槽を導
出した液化空気を、製品ガス液化器及び空気流量調節弁
とを経て前記空気循環系へ導入する系統と、前記精留装
置より導出した製品ガスを製品ガス圧送機を経て需要先
に送出する製品ガスラインと、前記製品ガスを分岐して
製品ガス液化器を経て前記製品液化ガス貯槽へ導入する
系統と、該製品液化ガス貯槽を導出した液化製品ガスを
、前記製品ガス気化器及び製品ガス流量調節弁とを経て
前記製品ガスラインへ合流する系統と、前記製品ガスラ
インに設けた圧力調節計からの信号により、前記空気流
量調節弁と製品ガス流量調節弁とを調節し、かつ、原料
空気圧縮機を導出し、精留装置に導入する原料空気ライ
ンに設けた原料空気流量調節計からの信号により、原料
空気圧縮機の吸入空気量を調節する手段を設けたことを
特徴とする需要変動に適した空気液化分離装置。 ４、前記空気循環系統の製品ガス液化器出口にＪＴ弁を
設けたことを特徴とする請求項３記載の需要変動に適し
た空気液化分離装置。 ５、前記製品液化ガス貯槽及び／又は液化空気貯槽の加
圧手段が貯留液化ガス自身である加圧蒸発器であること
を特徴とする請求項３の記載の需要変動に適した空気液
化分離装置。 ６、加圧蒸発器が、製品液化ガス液化器及び／又は製品
ガス気化器に一体に組込まれていることを特徴とする請
求項５の記載の需要変動に適した空気液化分離装置。 ７、原料空気圧縮機、吸着器等と、主熱交換器、精留塔
等よりなる精留装置を備え、空気を液化精留分離して、
酸素、窒素等を採取する空気液化分離装置において、液
化空気貯槽、製品液化ガス貯槽、製品ガス液化器、製品
ガス気化器、循環空気圧縮機を設け、原料空気の一部を
分岐して循環空気圧縮機に導入し、該圧縮機を導出した
空気を前記製品ガス気化器を経て、かつ該空気の一部を
分岐して該気化器を経ずに液化空気貯槽に導入し、該液
化空気貯槽を導出した空気を前記循環空気圧縮機へ循環
する空気循環系統と、前記精留装置より導出した製品ガ
スを製品ガス圧送機を経て需要先に送出する製品ガスラ
インと、前記製品ガスを分岐して製品ガス液化器を経て
前記製品液化ガス貯槽へ導入する製品ガス液化系統と、
該製品液化ガス貯槽を導出した製品ガスを、チェック弁
を介して前記製品ガスラインへ合流する製品気化ガス系
統と、前記製品ガスラインに設けられた圧力調節計から
の信号により、前記空気循環系統の液化空気貯槽の入口
に設けられた空気圧力調節弁及び製品液化ガス貯槽へ導
入する製品液化ガス供給系統の製品液化ガス貯槽入口弁
とを調節し、かつ原料空気圧縮機を導出し、精留装置に
導入する原料空気ラインに設けた原料空気流量調節計か
らの信号により、原料空気圧縮機の吸入空気量を調節す
る手段を設けたことを特徴とする需要変動に適した空気
液化分離装置。 ８、前記製品ガス液化器、製品ガス気化器が、それぞれ
液化空気貯槽内、製品液化ガス貯槽内に設けられ、かつ
前記空気循環系統、前記製品ガス液化系統と製品気化ガ
ス系統を、相互に熱交換する熱交換器を設けたことこと
を特徴とする請求項７記載の需要変動に適した空気液化
分離装置。 ９、前記製品液化ガス貯槽が、液化酸素ガス貯槽及び／
又は液化窒素ガス貯槽であることを特徴とする請求項３
及至８のいずれかに記載の需要変動に適した空気液化分
離装置。[Claims] 1. In an air liquefaction separation method in which raw air is compressed, purified and cooled, introduced into a rectifier, and subjected to liquefaction rectification separation to collect oxygen, nitrogen, etc., the product gas is When the demand for the product gas decreases, the product gas is branched off from the product gas pressure feeding line, and the branched product gas is liquefied and stored by exchanging heat with the stored liquefied air, and the vaporized air is sent to the air circulation line connected to the raw material air line. When the demand increases, the stored product liquefied gas is vaporized by heat exchange with the above-mentioned circulating air and merged into the above-mentioned product gas pressure delivery line, and the circulating air that has been liquefied by the above heat exchange is stored, and the non-liquefied air is The gas is recirculated to the circulation line, and the increase or decrease in the amount of circulating air is absorbed by the intake amount of feed air, and the amount of feed air introduced into the rectifier is maintained at a predetermined amount while responding to fluctuations in demand for product gas. An air liquefaction separation method suitable for demand fluctuations characterized by: 2. The air liquefaction separation method suitable for demand fluctuations according to claim 1, wherein the product gas is oxygen gas and/or nitrogen gas. 3. Air liquefaction separation, which consists of a rectification device equipped with a raw air compressor, adsorption device, etc., a main heat exchanger, a rectification column, etc., and separates air by liquefaction rectification to collect oxygen, nitrogen, etc. In the equipment, a liquefied air storage tank, a product liquefied gas storage tank, a product gas liquefier,
A product gas vaporizer and a circulating air compressor are provided, a part of the raw material air is branched and introduced into the circulating air compressor, and the air discharged from the compressor is introduced into the liquefied air storage tank through the product gas vaporizer. , an air circulation system that circulates the air led out of the liquefied air storage tank to the circulating air compressor; and an air circulation system that circulates the liquefied air led out of the liquefied air storage tank through a product gas liquefier and an air flow control valve. a product gas line that sends the product gas derived from the rectifier to the consumer via a product gas pressure feeder, and a product gas line that branches the product gas and passes through the product gas liquefier to the product liquefied gas storage tank. a system for introducing the liquefied product gas from the product liquefied gas storage tank into the product gas line via the product gas vaporizer and the product gas flow rate control valve; A feed air flow control valve is installed in the feed air line that controls the air flow rate control valve and the product gas flow rate control valve based on the signal from the pressure controller, and also leads out the feed air compressor and introduces it into the rectification device. An air liquefaction separation device suitable for demand fluctuations, characterized in that it is equipped with a means for adjusting the intake air amount of a raw material air compressor based on a signal from a feedstock air compressor. 4. The air liquefaction separation device suitable for demand fluctuations according to claim 3, characterized in that a JT valve is provided at the outlet of the product gas liquefier in the air circulation system. 5. The air liquefaction separation device suitable for demand fluctuations according to claim 3, wherein the means for pressurizing the product liquefied gas storage tank and/or the liquefied air storage tank is a pressurized evaporator that is the stored liquefied gas itself. . 6. The air liquefaction separation device suitable for demand fluctuations according to claim 5, characterized in that the pressurized evaporator is integrated into the product liquefied gas liquefier and/or the product gas vaporizer. 7. Equipped with a rectification device consisting of a raw air compressor, an adsorber, etc., a main heat exchanger, a rectification column, etc., and separates air by liquefaction rectification.
Air liquefaction separation equipment that collects oxygen, nitrogen, etc. is equipped with a liquefied air storage tank, a product liquefied gas storage tank, a product gas liquefier, a product gas vaporizer, and a circulating air compressor. The air introduced into the compressor and discharged from the compressor passes through the product gas vaporizer, and part of the air is branched and introduced into the liquefied air storage tank without passing through the vaporizer, and the air is introduced into the liquefied air storage tank. an air circulation system that circulates the air derived from the rectifier to the circulating air compressor; a product gas line that transmits the product gas derived from the rectifier to a consumer via a product gas pressure feeder; and a product gas line that branches the product gas. a product gas liquefaction system that introduces the product gas into the product liquefied gas storage tank via the product gas liquefier;
A product vaporized gas system in which the product gas led out of the product liquefied gas storage tank joins the product gas line via a check valve, and a signal from a pressure controller installed in the product gas line to control the air circulation system. The air pressure control valve installed at the inlet of the liquefied air storage tank and the product liquefied gas storage tank inlet valve of the product liquefied gas supply system introduced into the product liquefied gas storage tank are adjusted, and the raw material air compressor is led out to perform rectification. An air liquefaction separation device suitable for demand fluctuations, characterized by having means for adjusting the intake air amount of a feed air compressor based on a signal from a feed air flow rate controller installed in a feed air line introduced into the device. 8. The product gas liquefier and the product gas vaporizer are provided in a liquefied air storage tank and a product liquefied gas storage tank, respectively, and the air circulation system, the product gas liquefaction system, and the product vaporization system are mutually connected to heat. 8. The air liquefaction separation device suitable for demand fluctuations according to claim 7, further comprising a heat exchanger for exchanging the air. 9. The product liquefied gas storage tank is a liquefied oxygen gas storage tank and/or
or Claim 3, characterized in that it is a liquefied nitrogen gas storage tank.
9. An air liquefaction separation device suitable for demand fluctuations according to any one of items 1 to 8.
JP02210710A 1990-08-09 1990-08-09 Air liquefaction separation method and apparatus suitable for fluctuations in demand Expired - Lifetime JP3026098B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP02210710A JP3026098B2 (en) 1990-08-09 1990-08-09 Air liquefaction separation method and apparatus suitable for fluctuations in demand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP02210710A JP3026098B2 (en) 1990-08-09 1990-08-09 Air liquefaction separation method and apparatus suitable for fluctuations in demand

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013046890A (en) * 2011-08-29 2013-03-07 Air Liquide Japan Ltd Gas supply system and gas supply method
CN109701454A (en) * 2019-01-28 2019-05-03 安庆市泰发能源科技有限公司 Butane dehydrogenation, which goes into operation, recycles heat riser

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013046890A (en) * 2011-08-29 2013-03-07 Air Liquide Japan Ltd Gas supply system and gas supply method
CN109701454A (en) * 2019-01-28 2019-05-03 安庆市泰发能源科技有限公司 Butane dehydrogenation, which goes into operation, recycles heat riser
CN109701454B (en) * 2019-01-28 2024-02-13 安庆市泰发能源科技有限公司 Butane dehydrogenation start-up circulation heating device

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