JP2873382B2 - Air liquefaction separator and liquefied gas injection method - Google Patents
Air liquefaction separator and liquefied gas injection methodInfo
- Publication number
- JP2873382B2 JP2873382B2 JP1324726A JP32472689A JP2873382B2 JP 2873382 B2 JP2873382 B2 JP 2873382B2 JP 1324726 A JP1324726 A JP 1324726A JP 32472689 A JP32472689 A JP 32472689A JP 2873382 B2 JP2873382 B2 JP 2873382B2
- Authority
- JP
- Japan
- Prior art keywords
- liquefied
- liquefied gas
- air
- nitrogen
- conduit
- 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 - Lifetime
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
- F25J3/044—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 single pressure main column system only
-
- 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
- F25J3/04478—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 controlling purposes, e.g. start-up or back-up procedures
-
- 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
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/40—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval
- F25J2240/44—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval the fluid being 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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/42—Processes or apparatus involving steps for recycling of process streams the recycled stream being 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
- F25J2280/00—Control of the process or apparatus
- F25J2280/10—Control for or during start-up and cooling down of the installation
-
- 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)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は空気液化分離装置及び液化ガス注入方法に関
し、特に空気液化分離装置本体部に寒冷補給用として液
化ガスを注入する装置及びその方法に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air liquefaction / separation apparatus and a liquefied gas injection method, and more particularly to an apparatus and a method for injecting a liquefied gas into a main body of an air liquefaction / separation apparatus for cold replenishment. .
第２図は、単精留塔を用いて窒素ガスとともに液化窒
素の採取を行う従来の空気液化分離装置の要部を示して
いる。FIG. 2 shows a main part of a conventional air liquefaction / separation apparatus for collecting liquefied nitrogen together with nitrogen gas using a single rectification column.
この空気液化分離装置１は、前処理工程（図示せず）
で圧縮，精製，冷却された原料空気Ａを液化精留分離す
る精留塔２と、該精留塔２内で分離した窒素ガスGNを凝
縮液化させる凝縮器３と、該凝縮器３で液化した液化窒
素LNを受入れるための低圧貯槽4a及び液化窒素注入用の
高圧貯槽4bからなる一対の貯槽と、これらを結ぶ各種導
管及び各種弁とから構成されている。This air liquefaction / separation apparatus 1 is provided with a pretreatment step (not shown).
A rectification tower 2 for liquefying and separating the raw material air A compressed, purified and cooled in the rectifier, a condenser 3 for condensing and liquefying the nitrogen gas GN separated in the rectification tower 2, and a liquefaction in the condenser 3 It comprises a pair of storage tanks including a low-pressure storage tank 4a for receiving the liquefied nitrogen LN and a high-pressure storage tank 4b for injecting liquefied nitrogen, and various conduits and various valves connecting these tanks.
通常の液化窒素採取運転時には、精留塔２上部に分離
して導管５から導出された窒素ガスGNは、製品窒素ガス
PNとして導管６から採取される以外の窒素ガスGNが導管
７から凝縮器３に導入され、精留塔２の底部から導管８
に導出されて弁９で減圧した液化空気LAにより凝縮して
液化窒素LNとなる。凝縮器３から凝縮器出口導管10に導
出された液化窒素LNの内、還流液として還流液導入導管
11から精留塔２の上部に戻される以外の液化窒素LNは、
液化窒素採取系統の弁12,導管13,導管14a,弁15aを介し
て、該液化窒素LNの有する圧力で液化窒素受入れ用の低
圧貯槽4aに取出される。During normal liquefied nitrogen sampling operation, the nitrogen gas GN separated at the upper part of the rectification column 2 and led out from the conduit 5 is the product nitrogen gas.
Nitrogen gas GN other than that collected from the conduit 6 as PN is introduced into the condenser 3 from the conduit 7, and is supplied from the bottom of the rectification column 2 to the conduit 8.
And is condensed by the liquefied air LA depressurized by the valve 9 to become liquefied nitrogen LN. Among the liquefied nitrogen LN drawn out from the condenser 3 to the condenser outlet conduit 10, a reflux liquid introduction conduit as a reflux liquid
The liquefied nitrogen LN other than returned to the upper part of the rectification column 2 from 11 is
The liquefied nitrogen is taken out to the low-pressure storage tank 4a for receiving liquefied nitrogen at the pressure of the liquefied nitrogen LN via the valve 12, conduit 13, conduit 14a, and valve 15a of the liquefied nitrogen sampling system.
一方、精留塔２の底部に分離する酸素成分が富化され
た液化空気LAは、前述のごとく導管8,弁９を経て凝縮器
３に導入され、気化して排ガスＷとなり導管16から排出
される。On the other hand, the liquefied air LA enriched in the oxygen component separated at the bottom of the rectification column 2 is introduced into the condenser 3 through the conduit 8 and the valve 9 as described above, and is vaporized to become exhaust gas W and discharged from the conduit 16. Is done.
また、起動時，再起動時，タービン停止運転時等、液
化窒素LNを注入する場合には、液化窒素注入用の高圧貯
槽4bから、該貯槽4b内の液化窒素LNの圧力で、弁15b,導
管14b,導管13,弁12,還流液導入導管11を介して精留塔２
内に注入する。In addition, when liquefied nitrogen LN is injected at the time of starting, restarting, turbine stop operation, etc., when the liquefied nitrogen LN in the storage tank 4b is supplied from the high pressure storage tank 4b for injection of liquefied nitrogen, the valves 15b, Rectification column 2 via conduit 14b, conduit 13, valve 12, reflux liquid introduction conduit 11
Inject into.
上述のごとく、液化ガス（液化窒素）の生産採取（取
出し）と、装置運転に必要な寒冷源としての液化ガスの
装置外部よりの補給（注入）という２つの機能を持つ従
来の空気液化分離装置においては、液化ガスの取出し部
と液化ガスの注入部を同一点（還流液導入導管との分岐
点）とし、又装置外部に１基又は２基の液化ガス貯槽を
設けて装置への液化ガスの注入及び装置から貯槽への液
の取出しを行っている。As described above, a conventional air liquefaction / separation apparatus having two functions of production and extraction (extraction) of liquefied gas (liquefied nitrogen) and replenishment (injection) of liquefied gas as a cold source required for operation of the apparatus from outside the apparatus. In the above, the liquefied gas take-out part and the liquefied gas injection part are set at the same point (branch point to the reflux liquid introducing conduit), and one or two liquefied gas storage tanks are provided outside the apparatus to supply the liquefied gas to the apparatus. And the removal of liquid from the device to the storage tank.
上述のごとく、液化ガスを注入する時と取出す時で
は、液化ガスの流れる方向を逆転させる必要が生ずる
が、一般に、これを液化ガスの圧力で行うために、貯槽
として高圧及び低圧の２基を設けて、高圧貯槽を液化ガ
ス注入用とし、低圧貯槽を液化ガス取出し用としてい
る。As described above, it is necessary to reverse the flow direction of the liquefied gas when injecting and extracting the liquefied gas. Generally, in order to perform this at the pressure of the liquefied gas, two tanks of high pressure and low pressure are used as storage tanks. The high-pressure storage tank is provided for liquefied gas injection, and the low-pressure storage tank is used for liquefied gas extraction.
このように貯槽を２基設けて一方を注入用、他方を取
出し用としたものでは、貯槽が２基必要となること、及
び注入，取出し各々で貯槽の切替えが必要となる等、設
備が複雑となる不都合があった。また、液化ガスの貯槽
を１基だけとして液化ガスの注入，取出しを行うことも
できるが、貯槽を１基とした場合には、貯槽内の圧力を
注入，取出しに応じて上昇，下降させる必要があるため
液化ガスの無駄が生ずることや、昇圧，降圧に時間を要
し、的確な注入，取出しの切替えができない等の不都合
があった。In the case where two storage tanks are provided and one is used for injection and the other is used for extraction as described above, two storage tanks are required, and the switching of storage tanks is required for each of injection and extraction, and the equipment is complicated. There was an inconvenience. The liquefied gas can be injected and taken out using only one liquefied gas storage tank. However, when the liquefied gas is used as a single storage tank, the pressure in the storage tank needs to be increased and decreased according to the injection and extraction. Therefore, there are inconveniences such as waste of the liquefied gas, time required for increasing and decreasing the pressure, and inability to accurately switch between injection and extraction.
そこで本発明は、１基の貯槽だけでも液化ガスの取出
し及び注入が行え、しかも切替え操作も容易な液化ガス
の注入手段を提供することを目的としている。Therefore, an object of the present invention is to provide a means for injecting a liquefied gas that can take out and inject a liquefied gas with only one storage tank and that can easily perform a switching operation.
上記目的を達成するために、本発明の空気液化分離装
置は、空気液化分離装置の液化ガス採取貯留系統と、該
系統よりも低い圧力を有する寒冷補給部との間に、液化
ガス採取貯留系統内に貯留されている液化ガスを寒冷補
給部に注入する液化ガス注入経路を設けたことを特徴と
している。In order to achieve the above object, an air liquefaction / separation device of the present invention includes a liquefied gas collection / storage system between a liquefied gas collection / storage system of an air liquefaction / separation device and a cold replenishment unit having a lower pressure than the system. A liquefied gas injection path for injecting the liquefied gas stored in the inside into the cold supply section is provided.
また、本発明の液化ガス注入方法は、空気液化分離装
置の液化ガス採取貯留系統から、該系統よりも低い圧力
を有する寒冷補給部に、液化ガス採取貯留系統内に貯留
されている液化ガスを注入することを特徴としている。Further, the liquefied gas injection method of the present invention, the liquefied gas is stored in the liquefied gas sampling and storage system from the liquefied gas sampling and storage system of the air liquefaction separation device to the cold replenishment unit having a lower pressure than the system. It is characterized by injection.
上記のごとく構成することにより、液化ガスの採取時
には、製出される液化ガス自身の圧力で貯留できるとと
もに、注入時には、貯留されている液化ガスの圧力を利
用して注入操作を行うことができる。即ち、貯槽内の圧
力を略一定に保ったまま液化ガスの採取及び注入を行う
ことが可能となる。With the configuration described above, the liquefied gas can be stored at the pressure of the produced liquefied gas itself at the time of collection of the liquefied gas, and at the time of injection, the injection operation can be performed using the pressure of the stored liquefied gas. That is, it is possible to collect and inject the liquefied gas while keeping the pressure in the storage tank substantially constant.
以下、本発明を第１図に示す一実施例に基づいてさら
に詳細に説明する。Hereinafter, the present invention will be described in more detail based on one embodiment shown in FIG.
第１図は、前記第２図に示した空気液化分離装置と略
同じ構成の空気液化分離装置に本発明を適用したもの
で、単精留塔を用いて窒素ガスとともに液化窒素の採取
を行う空気液化分離装置の要部を示している。FIG. 1 shows a case where the present invention is applied to an air liquefaction / separation apparatus having substantially the same configuration as that of the air liquefaction / separation apparatus shown in FIG. 2, and liquefied nitrogen is collected together with nitrogen gas using a single rectification column. 3 shows a main part of the air liquefaction separation device.
この空気液化分離装置20は、前記従来例と同様に、原
料空気Ａを液化精留分離する精留塔21と、該精留塔21内
で分離した窒素ガスGNを凝縮液化させる凝縮器22と、該
凝縮器22で液化した液化窒素LNを受入れるとともに、液
化窒素LNの注入源ともなる液化窒素貯槽23と、これらを
結ぶ各種導管及び各種弁とから構成されている。The air liquefaction / separation apparatus 20 includes a rectification tower 21 for liquefying and separating the raw material air A, and a condenser 22 for condensing and liquefying the nitrogen gas GN separated in the rectification tower 21, as in the conventional example. A liquefied nitrogen storage tank 23 which receives the liquefied nitrogen LN liquefied by the condenser 22 and also serves as an injection source of the liquefied nitrogen LN is constituted by various conduits and various valves connecting these tanks.
上記凝縮器22には、従来と同様に、精留塔21上部の窒
素ガスGNがガス入口導管24から導入されるとともに、精
留塔21下部の液化空気LAが減圧弁25で減圧された後に液
入口導管26から導入され、両者の熱交換により窒素ガス
GNが凝縮液化して液化窒素LNとなり凝縮器出口導管27か
ら導出され、一部が後述の液化窒素採取貯留系統30を経
て液化窒素貯槽23に貯留され、大部分が還流液導入導管
28を介して精留塔21上部に還流液として導入されるとと
もに、液化空気LAは気化して排出導管29から排ガスＷと
して導出される。In the condenser 22, the nitrogen gas GN in the upper part of the rectification column 21 is introduced from the gas inlet conduit 24, and the liquefied air LA in the lower part of the rectification column 21 is depressurized by the pressure reducing valve 25, as in the conventional case. Nitrogen gas is introduced from the liquid inlet conduit 26 and heat exchange between the two
GN is condensed and liquefied and becomes liquefied nitrogen LN, which is led out of the condenser outlet conduit 27, a part of which is stored in a liquefied nitrogen storage tank 23 through a liquefied nitrogen collection storage system 30 described later, and most of the reflux liquid introduction conduit
The liquefied air LA is introduced into the upper part of the rectification column 21 as a reflux liquid via the liquefied gas 28, and the liquefied air LA is vaporized and discharged as an exhaust gas W from the discharge conduit 29.
上記凝縮器22で液化した液化窒素LNを採取する液化窒
素採取貯留系統30は、凝縮器出口導管27から還流液導入
導管28に至る系統から、液化窒素取出し用調節弁31を介
して分岐する液化窒素取出し用導管32と、液化窒素取出
し用導管32から液化窒素取出し／注入用調節弁33を介し
て連設された液化窒素取出し／注入用導管34と、前記取
出し注入弁33の液化窒素取出し用導管32側から液化窒素
注入用調節弁35介して分岐し、前記凝縮器22の液入口導
管26の減圧弁25の下流側に接続する液注入用導管36とか
ら構成されている。A liquefied nitrogen collection and storage system 30 that collects liquefied nitrogen LN liquefied in the condenser 22 is a liquefied liquefaction branching from a system from a condenser outlet conduit 27 to a reflux liquid introduction conduit 28 via a liquefied nitrogen extraction control valve 31. A conduit 32 for taking out nitrogen, a conduit 34 for taking out / injecting liquefied nitrogen connected to the conduit 32 for taking out / injecting liquefied nitrogen from the conduit 32 for taking out / injecting liquefied nitrogen, A liquid injection conduit 36 branches off from the conduit 32 through a liquefied nitrogen injection control valve 35 and is connected to the liquid inlet conduit 26 of the condenser 22 downstream of the pressure reducing valve 25.
このように構成された空気液化分離装置20の各主要導
管部の圧力は、周知のごとく、 凝縮器出口導管27 ＞液化窒素取出し用導管32 ＞液化窒素取出し／注入用導管34 ＞凝縮器22の液入口導管26 となっている。As is well known, the pressure in each of the main conduits of the air liquefaction / separation apparatus 20 having such a configuration is as follows: a condenser outlet conduit 27> a liquefied nitrogen discharge conduit 32> a liquefied nitrogen discharge / injection conduit 34> condenser 22 A liquid inlet conduit 26 is provided.
従って、通常の液化窒素採取運転の際には、従来と同
様に、凝縮器22で液化した液化窒素LNの一部が液化窒素
取出し用調節弁31及び／又は液化窒素取出し／注入用調
節弁33により流量を制御され、その圧力差により凝縮器
出口導管27から液化窒素取出し用導管32,液化窒素取出
し／注入用導管34を経て液化窒素貯槽23に採取される。
このとき、液注入用導管36の液化窒素注入用調節弁35は
閉じられている。Therefore, during a normal liquefied nitrogen collection operation, a part of the liquefied nitrogen LN liquefied in the condenser 22 is controlled by the liquefied nitrogen removal control valve 31 and / or the liquefied nitrogen removal / injection control valve 33 as in the conventional case. The liquefied nitrogen is collected from the condenser outlet conduit 27 via the liquefied nitrogen extracting conduit 32 and the liquefied nitrogen extracting / injecting conduit 34 into the liquefied nitrogen storage tank 23 by the pressure difference.
At this time, the control valve 35 for liquefied nitrogen injection of the conduit 36 for liquid injection is closed.
そして空気液化分離装置20に寒冷を補給するために液
化窒素LNを注入するときには、液化窒素取出し用調節弁
31を閉じて液化窒素注入用調節弁35を開き、液化窒素取
出し／注入用調節弁33及び／又は液化窒素注入用調節弁
35で液化窒素LNの流量を調節することにより、各導管内
の圧力差で液化窒素LNが液化窒素貯槽23から凝縮器22の
液入口導管26に導入される。これにより、凝縮器22の液
化空気室内に液化窒素LNが注入されて寒冷の補給が行わ
れ、凝縮器22で所定量の窒素ガスGNを液化させて、必要
な量の精留塔還流液を得ることができる。When injecting liquefied nitrogen LN to replenish the air liquefier / separator 20 with cold, the liquefied nitrogen removal control valve
31 is closed and the control valve 35 for liquefied nitrogen injection is opened, and the control valve 33 for liquefied nitrogen extraction / injection and / or the control valve for liquefied nitrogen injection
By adjusting the flow rate of the liquefied nitrogen LN at 35, the liquefied nitrogen LN is introduced from the liquefied nitrogen storage tank 23 to the liquid inlet conduit 26 of the condenser 22 due to the pressure difference in each conduit. As a result, liquefied nitrogen LN is injected into the liquefied air chamber of the condenser 22 to perform cold replenishment, and a predetermined amount of the nitrogen gas GN is liquefied by the condenser 22 so that a necessary amount of the rectification column reflux liquid is obtained. Obtainable.
従って、液化窒素貯槽の圧力を上下させたり、圧力の
異なる複数の液化窒素貯槽を設けることなく、小数の弁
の開閉のみで液化窒素LNの取出し／注入を行うことがで
き、しかも的確なタイミングで必要十分な量の寒冷補給
を無駄なく行うことができる。Therefore, it is possible to take out / inject liquefied nitrogen LN only by opening and closing a small number of valves without raising or lowering the pressure of the liquefied nitrogen storage tank or providing a plurality of liquefied nitrogen storage tanks having different pressures. A necessary and sufficient amount of cold supply can be performed without waste.
さらに、空気液化分離装置20の運転開始（立ち上げ）
時には、凝縮器22から導出される液化窒素LNが所定の純
度に達するまである程度の時間を必要とし、この間は凝
縮器出口導管27の中の液化窒素は系外にパージしていた
が、本発明によれば、液化窒素取出し用調節弁31及び液
化窒素注入用調節弁35を開き、液化窒素取出し／注入用
調節弁33を閉じることにより、この間の不純窒素を凝縮
器出口導管27から液注入用導管36,液入口導管26を介し
て凝縮器22の液化空気室に導入することができ、不純窒
素の持つ寒冷を有効に利用することができる。これによ
り、装置立ち上げ時の熱損失を低減でき、立ち上げ時間
の短縮も図ることができる。Further, the operation of the air liquefaction separation device 20 is started (start-up).
Occasionally, it takes a certain amount of time for the liquefied nitrogen LN derived from the condenser 22 to reach a predetermined purity, and during this time the liquefied nitrogen in the condenser outlet conduit 27 has been purged out of the system. According to the method, the control valve 31 for removing liquefied nitrogen and the control valve 35 for injecting liquefied nitrogen are opened, and the control valve 33 for removing / injecting liquefied nitrogen is closed. The liquid can be introduced into the liquefied air chamber of the condenser 22 through the conduit 36 and the liquid inlet conduit 26, and the refrigeration of the impure nitrogen can be effectively used. Thereby, heat loss at the time of starting the apparatus can be reduced, and the starting time can be shortened.
また、注入される液化窒素LNは、通常凝縮器22に導入
される液化空気LAより圧力が高いので、これに膨張ター
ビンを適宜組合せることにより、さらに効率のよい寒冷
補給を行うことができる。Further, since the pressure of the liquefied nitrogen LN to be injected is higher than that of the liquefied air LA which is usually introduced into the condenser 22, more efficient cold replenishment can be performed by appropriately combining this with an expansion turbine.
尚、上記実施例は、精留塔として単精留塔を用いた窒
素採取用の空気液化分離装置であるが、本発明は、複精
留塔を用いた空気液化分離装置にも適用することが可能
である。即ち、上記同様に凝縮器出口導管から液化窒素
取出し用導管，液化窒素取出し／注入用導管を介して液
化窒素貯槽を接続するとともに、前記同様の液注入用導
管を、下部塔（高圧塔）底部から導出され、減圧弁で減
圧されて上部塔（低圧塔）に導入される液化空気導管の
減圧弁の下流側に接続すればよい。Although the above embodiment is an air liquefaction and separation apparatus for nitrogen collection using a single rectification tower as a rectification tower, the present invention is also applicable to an air liquefaction and separation apparatus using a double rectification tower. Is possible. That is, the liquefied nitrogen storage tank is connected from the condenser outlet conduit via the liquefied nitrogen discharge conduit and the liquefied nitrogen discharge / injection conduit in the same manner as described above, and the same liquid injection conduit is connected to the bottom of the lower tower (high-pressure tower). Is connected to the downstream side of the pressure reducing valve of the liquefied air conduit which is decompressed by the pressure reducing valve and introduced into the upper tower (low pressure tower).
このように、液化ガスを採取貯留する系統と、この系
統よりも低い圧力で運転され、かつ寒冷の補給を行える
部分とを接続し、必要な部分に弁を設けて液化ガスの流
れ方向及び量を制御するだけで液化ガスの貯留と注入を
容易に切替えることができる。As described above, the system for collecting and storing the liquefied gas is connected to the portion operated at a lower pressure than the system and capable of replenishing cold, and a valve is provided in a necessary portion to provide a flow direction and an amount of the liquefied gas. , The storage and injection of the liquefied gas can be easily switched.
以上説明したように、本発明によれば、複数の液化ガ
ス貯槽を設置する必要が無いので空気液化分離装置の設
置スペースの縮小とともに設備費の低減を図ることがで
きる。また従来の１基の液化ガス貯槽内の圧力を上下さ
せて液化ガスの取出し／注入を行うものに比べると、圧
力の上下に伴う液化ガスの損失が無くなるとともに、取
出し／注入の切り替え時間の短縮による的確な操作が可
能となる。As described above, according to the present invention, it is not necessary to install a plurality of liquefied gas storage tanks, so that it is possible to reduce the installation space of the air liquefaction / separation apparatus and the equipment cost. Also, compared to the conventional method of taking out / injecting a liquefied gas by raising and lowering the pressure in one liquefied gas storage tank, loss of the liquefied gas due to the increase / decrease of the pressure is eliminated and the switching time of taking out / injection is shortened. This allows for an accurate operation.
さらに、液化ガスの取出し／注入の切り替えが小数の
弁の開閉操作だけなので、小型のコンピュータによる自
動制御や遠隔操作が可能となり、多数の空気液化分離装
置を設置した場合にも集中管理を行うことができる。従
って、全自動運転が可能となり、特に自動起動，自動純
度向上運転が可能となる。Furthermore, since the switching of liquefied gas extraction / injection is performed only by opening and closing a small number of valves, automatic control and remote control by a small computer are possible, and centralized management can be performed even when a large number of air liquefaction / separation devices are installed. Can be. Therefore, fully automatic operation becomes possible, and in particular, automatic start and automatic purity improvement operation become possible.
加えて装置の立ち上げ時の寒冷も有効に利用すること
が可能となるので、装置立ち上げ時の熱損失を低減で
き、立ち上げ時間の短縮による動力費の節減も図ること
ができる。In addition, since it is possible to effectively use the cold at the time of starting the apparatus, it is possible to reduce the heat loss at the time of starting the apparatus and to save the power cost by shortening the starting time.
第１図は本発明の一実施例を示す空気液化分離装置の要
部の系統図、第２図は従来例を示す系統図である。 20…空気液化分離装置、21…精留塔、22…凝縮器、23…
液化窒素貯槽、24…ガス入口導管、25…減圧弁、26…液
入口導管、27…凝縮器出口導管、30…液化窒素採取貯留
系統、31…液化窒素取出し用調節弁、32…液化窒素取出
し用導管、33…液化窒素取出し／注入用調節弁、34…液
化窒素取出し／注入用導管、35…液化窒素注入用調節
弁、36…液注入用導管、Ａ…原料空気、GN…窒素ガス、
LA…液化空気、LN…液化窒素FIG. 1 is a system diagram of a main part of an air liquefaction separator showing one embodiment of the present invention, and FIG. 2 is a system diagram showing a conventional example. 20 ... air liquefaction separation device, 21 ... rectification column, 22 ... condenser, 23 ...
Liquefied nitrogen storage tank, 24 gas inlet conduit, 25 pressure reducing valve, 26 liquid inlet conduit, 27 condenser outlet conduit, 30 liquid nitrogen collection and storage system, 31 liquid nitrogen removal control valve, 32 liquid nitrogen removal Conduit for 33, liquefied nitrogen take-off / injection control valve, 34 ... liquefied nitrogen take-out / injection conduit, 35 ... liquefied nitrogen injecting control valve, 36 ... liquid injecting conduit, A: raw material air, GN: nitrogen gas,
LA: liquefied air, LN: liquefied nitrogen
Claims (4)
導入し、液化精留分離を行い少なくとも液化ガスを採取
して貯留する液化ガス採取貯留系統を有する空気液化分
離装置において、該空気液化分離装置の前記液化ガス採
取貯留系統と、該系統よりも低い圧力を有する寒冷補給
部との間に、液化ガス採取貯留系統内に貯留されている
液化ガスを寒冷補給部に注入する液化ガス注入経路を設
けたことを特徴とする空気液化分離装置。1. An air liquefaction / separation apparatus having a liquefied gas sampling and storage system for compressing, purifying, cooling and introducing a raw material air into a rectification tower, performing liquefied rectification separation, and collecting and storing at least a liquefied gas. The liquefied gas stored in the liquefied gas sampling and storage system is injected between the liquefied gas sampling and storage system of the air liquefaction separation device and the cold replenishing unit having a lower pressure than the system. An air liquefaction / separation apparatus, wherein a liquefied gas injection path is provided.
出して減圧した後に、凝縮器又は上部塔に導入される液
化空気の系統であることを特徴とする請求項１記載の空
気液化分離装置。2. The air according to claim 1, wherein the cold replenishing section is a system of liquefied air which is introduced from a bottom of the rectification column, decompressed, and then introduced into a condenser or an upper column. Liquefaction separator.
導入し、液化精留分離を行い少なくとも液化ガスを採取
して貯留する液化ガス採取貯留系統を有する空気液化分
離装置における液化ガス注入方法において、該空気液化
分離装置の前記液化ガス採取貯留系統から、該系統より
も低い圧力を有する寒冷補給部に、液化ガス採取貯留系
統内に貯留されている液化ガスを注入することを特徴と
する空気液化分離装置における液化ガス注入方法。3. An air liquefaction / separation apparatus having a liquefied gas sampling and storage system for compressing, purifying, cooling and introducing into a rectification tower, performing liquefied rectification separation, and collecting and storing at least a liquefied gas. In the gas injection method, injecting the liquefied gas stored in the liquefied gas sampling and storage system from the liquefied gas sampling and storage system of the air liquefaction / separation device to a cold replenishment unit having a lower pressure than the system. A method for injecting liquefied gas into an air liquefaction / separation apparatus.
出して減圧した後に、凝縮器又は上部塔に導入される液
化空気の系統であることを特徴とする請求項３記載の空
気液化分離装置における液化ガス注入方法。4. The air according to claim 3, wherein said cold replenishing section is a system of liquefied air which is introduced from a bottom of said rectification column, decompressed, and then introduced into a condenser or an upper column. A liquefied gas injection method in a liquefaction / separation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1324726A JP2873382B2 (en) | 1989-12-13 | 1989-12-13 | Air liquefaction separator and liquefied gas injection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1324726A JP2873382B2 (en) | 1989-12-13 | 1989-12-13 | Air liquefaction separator and liquefied gas injection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03186182A JPH03186182A (en) | 1991-08-14 |
| JP2873382B2 true JP2873382B2 (en) | 1999-03-24 |
Family
ID=18169020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1324726A Expired - Lifetime JP2873382B2 (en) | 1989-12-13 | 1989-12-13 | Air liquefaction separator and liquefied gas injection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2873382B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3455266B2 (en) | 1993-02-01 | 2003-10-14 | ライカ ジオシステムズ インコーポレイテッド | GPS code measurement value smoothing method, GPS receiver differential position determination method and apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09217982A (en) * | 1996-02-09 | 1997-08-19 | Nippon Sanso Kk | Air liquefaction separation device and air liquefaction separation method |
| EP2390604A1 (en) * | 2010-05-27 | 2011-11-30 | Linde AG | Method and device for separating a fluid mixture using deep temperature distillation, in particular for acquiring pure krypton |
-
1989
- 1989-12-13 JP JP1324726A patent/JP2873382B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3455266B2 (en) | 1993-02-01 | 2003-10-14 | ライカ ジオシステムズ インコーポレイテッド | GPS code measurement value smoothing method, GPS receiver differential position determination method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03186182A (en) | 1991-08-14 |
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