JPH0792328B2 - Method for supplying working gas of cryogenic valve in air liquefaction separation device - Google Patents
Method for supplying working gas of cryogenic valve in air liquefaction separation deviceInfo
- Publication number
- JPH0792328B2 JPH0792328B2 JP62278633A JP27863387A JPH0792328B2 JP H0792328 B2 JPH0792328 B2 JP H0792328B2 JP 62278633 A JP62278633 A JP 62278633A JP 27863387 A JP27863387 A JP 27863387A JP H0792328 B2 JPH0792328 B2 JP H0792328B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- working gas
- valve
- low temperature
- air liquefaction
- 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
- F25J3/04763—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
- F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- 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
- F25J3/04642—Recovering noble gases from 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
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
-
- 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
- F25J3/08—Separating gaseous impurities from gases or gaseous mixtures or from liquefied gases or liquefied gaseous mixtures
-
- 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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/32—Processes or apparatus using separation by rectification using a side column fed by a stream from the high pressure column
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/82—Processes or apparatus using other separation and/or other processing means using a reactor with combustion or catalytic reaction
-
- 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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/10—Hydrogen
-
- 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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/30—Helium
-
- 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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/32—Neon
-
- 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
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/42—Separating low boiling, i.e. more volatile components from nitrogen, e.g. He, H2, Ne
-
- 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
-
- 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
- F25J2250/20—Boiler-condenser with multiple exchanger cores in parallel or with multiple re-boiling or condensing streams
-
- 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
- F25J2250/42—One fluid being nitrogen
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、空気液化分離装置に用いられる低温弁と該低
温弁の駆動部とをコールドボックス内に配設した空気液
化分離装置における低温弁の作動ガス供給方法に関する
ものである。Description: TECHNICAL FIELD The present invention relates to a low temperature valve in an air liquefaction separation device in which a low temperature valve used in the air liquefaction separation device and a drive unit of the low temperature valve are arranged in a cold box. The present invention relates to a method for supplying working gas.
空気液化分離装置内の低温流体の流量を制御する低温弁
としては、例えば実開昭56−95667号公報に示される低
温流体用制御弁装置等が知られている。As a low temperature valve for controlling the flow rate of the low temperature fluid in the air liquefaction separation device, for example, a low temperature fluid control valve device disclosed in Japanese Utility Model Laid-Open No. 56-95667 is known.
上記公報に示される低温弁は、弁体部と、これを開閉さ
せる駆動部とを一体化したもので、該駆動部を作動させ
る作動ガスとして、流量を制御される低温流体と略同程
度の低温のものを用いている。The low temperature valve disclosed in the above publication is a combination of a valve body portion and a drive portion for opening and closing the valve body portion. The working gas for operating the drive portion has a flow rate that is substantially the same as that of the low temperature fluid. It uses a low temperature one.
〔発明が解決しようとする問題点〕 しかしながら、液化窒素や液化酸素等と同程度の温度
で、しかも弁体を開閉させることのできる圧力下で液化
しないガスは、ヘリウム（He）またはネオン（Ne）ある
いはこれらを主成分とするガス等、限られたものであ
り、その供給や保管のために特別な装置及び経費を必要
としていた。[Problems to be Solved by the Invention] However, a gas that is not liquefied at a temperature similar to that of liquefied nitrogen or liquefied oxygen and under the pressure that can open and close the valve element is helium (He) or neon (Ne). ) Or gas containing these as the main components is limited, and a special device and cost are required for supply and storage thereof.
そこで、本発明は、低温弁の開閉を行うための作動ガス
を容易に供給することのできる空気液化分離装置におけ
る低温弁の作動ガス供給方法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 method for supplying a working gas for a low temperature valve in an air liquefaction separation device, which can easily supply a working gas for opening and closing the low temperature valve.
上記した目的を達成するために本発明は、空気液化分離
装置に用いられる低温弁と該低温弁の駆動部とをコール
ドボックス内に配設した空気液化分離装置における低温
弁の作動ガス供給方法において、主凝縮器で凝縮しない
不凝縮ガスを採取して濃縮・精製し、この濃縮・精製さ
れたガスを作動ガスとして前記低温弁の駆動部に供給す
ることを特徴とする。In order to achieve the above-mentioned object, the present invention provides a working gas supply method for a cryogenic valve in an air liquefaction separation device in which a cryogenic valve used in the air liquefaction separation device and a drive unit for the cryogenic valve are arranged in a cold box. The non-condensable gas that does not condense in the main condenser is collected, concentrated and purified, and the concentrated and purified gas is supplied as a working gas to the drive unit of the low temperature valve.
従って、空気液化分離装置の運転とともに、低温弁用の
作動ガスを供給することができる。また、主凝縮器の不
凝縮ガスを濃縮・精製して低温弁の駆動部の作動ガスと
して用いるので、低温で固化する炭酸ガスや水分等、ま
た液化する酸素等、あるいは燃焼，爆発の危険性を有す
る水素や炭化水素等を含まない作動ガスを得ることがで
きる。Therefore, the working gas for the cryogenic valve can be supplied together with the operation of the air liquefaction separation device. In addition, since the non-condensable gas of the main condenser is concentrated and purified and used as the working gas of the drive part of the low temperature valve, carbon dioxide and water that solidify at low temperature, liquefied oxygen, etc., or the risk of combustion or explosion It is possible to obtain a working gas containing no hydrogen, hydrocarbon, or the like.
以下、本発明の一実施例を図面に基づいて説明する。
尚、図においては、本発明の説明に必要な系統のみを示
す。An embodiment of the present invention will be described below with reference to the drawings.
In the figure, only the system necessary for explaining the present invention is shown.
空気液化分離装置１は、下部塔２及び上部塔３からなる
精留塔４に液化点付近まで冷却された原料空気Ａを導入
して窒素や酸素等を精留分離するもので、液化窒素ある
いは液化酸素等の低温流体用の配管５には、これらの流
量を制御するための低温弁６が設けられている。The air liquefaction / separation device 1 introduces the raw material air A cooled to near the liquefaction point into a rectification column 4 consisting of a lower column 2 and an upper column 3 to rectify and separate nitrogen and oxygen. A pipe 5 for a low temperature fluid such as liquefied oxygen is provided with a low temperature valve 6 for controlling the flow rate thereof.
上記精留塔４や低温弁６及び熱交換器7,8等は、外部と
気密及び断熱されたコールドボックス９内に収納されて
いる。尚、図ではコールドボックス9,9を説明上分離し
て示しているが、同一のものである。The rectification column 4, the low temperature valve 6, the heat exchangers 7, 8 and the like are housed in a cold box 9 which is airtight and heat insulated from the outside. Although the cold boxes 9 and 9 are shown separately in the drawing, they are the same.
原料空気Ａ、圧縮，精製されてコールドボックス９内に
導入され、熱交換器７で液化点付近まで冷却され、精留
塔４の下部塔２に導入されて精留分離される。The raw material air A is compressed, purified, introduced into the cold box 9, cooled to near the liquefaction point by the heat exchanger 7, and introduced into the lower column 2 of the rectification column 4 for rectification separation.
この時、沸点の低い窒素，ネオン，ヘリウム及び水素
は、それぞれの分圧に応じてガス体のまま下部塔２内を
上昇して主凝縮器10に導入される。At this time, nitrogen, neon, helium, and hydrogen, which have low boiling points, rise in the lower column 2 as gas bodies according to their partial pressures and are introduced into the main condenser 10.
また窒素の一部およびその他の低沸点成分ガスを分解し
た原料空気Ａは、液化空気となり下部塔２の底部から導
出されて膨張した後に上部塔３に導入され、再び精留分
離されて頂部の窒素ガスと、底部の酸素となる。Further, the raw material air A obtained by decomposing a part of nitrogen and other low-boiling-point component gases becomes liquefied air, is discharged from the bottom of the lower tower 2 and expanded, then is introduced into the upper tower 3, and again rectified and separated to be rectified and separated. It becomes nitrogen gas and oxygen at the bottom.
前記主凝縮器10では、下部塔２頂部のガス体が上部塔３
の液化酸素と熱交換を行い、主として窒素ガスが凝縮液
化して液化窒素となり、他の低沸点成分であるネオン，
ヘリウム及び水素は、凝縮することなく不凝縮ガスUGと
して主凝縮器10の凝縮室の上部に濃縮される。In the main condenser 10, the gas body at the top of the lower tower 2 is in the upper tower 3
It exchanges heat with the liquefied oxygen, and mainly nitrogen gas is condensed and liquefied into liquefied nitrogen, and neon, which is another low boiling point component,
Helium and hydrogen are condensed in the upper part of the condensation chamber of the main condenser 10 as the non-condensed gas UG without condensing.
上記不凝縮ガスUGは、未凝縮の窒素ガスと共に主凝縮器
10の上部から導出され、不凝縮ガスUGの濃縮器11に導入
される。The non-condensed gas UG is the main condenser along with uncondensed nitrogen gas.
It is led out from the upper part of 10 and introduced into a condenser 11 of the non-condensing gas UG.
この濃縮器11は、濡れ壁式の濃縮筒12を備えており、前
記主凝縮器10で凝縮した液化窒素LNの一部を減圧弁13で
減圧してさらに真空ポンプ14で吸引し寒冷源として用
い、前記不凝縮ガスUG中の窒素ガスを凝縮させ、液化窒
素として底部から下部塔２に戻し、前記低沸点成分であ
るネオン，ヘリウム及び水素の濃縮を行う。寒冷源とし
て用いられた液化窒素LNは、熱交換器７で常温にまで昇
温して真空ポンプ14に吸引され、窒素ガス導管15に合流
する。This concentrator 11 is provided with a wet-wall type concentrating cylinder 12, and a part of the liquefied nitrogen LN condensed in the main condenser 10 is decompressed by a pressure reducing valve 13 and further sucked by a vacuum pump 14 as a cold source. The nitrogen gas in the non-condensed gas UG is condensed and returned to the lower column 2 from the bottom as liquefied nitrogen, and the low boiling point components neon, helium and hydrogen are concentrated. The liquefied nitrogen LN used as a cold source is heated to room temperature in the heat exchanger 7, sucked by the vacuum pump 14, and joined to the nitrogen gas conduit 15.
そして濃縮筒12の上部に濃縮された不凝縮ガスUGは、濃
縮筒12の上部から導出されて熱交換器７に導入され、原
料空気Ａと熱交換を行い昇温してコールドボックス９か
ら導出され、精製工程16に向かう。Then, the non-condensed gas UG concentrated in the upper part of the concentrating cylinder 12 is discharged from the upper part of the concentrating cylinder 12 and introduced into the heat exchanger 7, and heat-exchanges with the raw material air A to raise the temperature and is discharged from the cold box 9. And proceed to the purification step 16.
不凝縮ガスUGの精製は、不凝縮ガスUG中に含まれる水素
を除去するもので、可燃性ガスである水素の燃焼，爆発
等を防止するために行われる。The refining of the non-condensable gas UG removes hydrogen contained in the non-condensable gas UG, and is carried out in order to prevent combustion and explosion of the combustible gas hydrogen.
不凝縮ガスUGは、酸素ガス導管17から導入される所定量
の酸素ガスと混合され、触媒が充填された精製器18に導
入され、該不凝縮ガスUG中の水素は、酸素ガスと反応
し、燃焼して水となり、燃焼により発生した熱は、冷却
器19で冷却除去され、生成した水分は、吸着剤を充填し
た乾燥器20で吸着除去される。The non-condensable gas UG is mixed with a predetermined amount of oxygen gas introduced from the oxygen gas conduit 17 and introduced into the purifier 18 filled with a catalyst, and the hydrogen in the non-condensed gas UG reacts with the oxygen gas. The water is burnt to become water, and the heat generated by the combustion is cooled and removed by the cooler 19, and the generated water is adsorbed and removed by the dryer 20 filled with the adsorbent.
これにより、低沸点成分ガスを主体とした低温弁６の作
動ガスVGが得られる。この作動ガスVGは、空気液化分離
装置１の主凝縮器10で凝縮しない不凝縮ガスUGを濃縮・
精製して得ているので、低温で固化する炭酸ガスや水分
等、また液化する酸素やアルゴン等、あるいは燃焼，爆
発の危険性を有する水素や炭化水素等を含まないもので
あり、低温弁の作動ガスVGとして優れた性状を備えてい
る。さらに、従来大気中に放出されていた主凝縮器10で
の不凝縮ガスUGを用いるため、ほとんどコストが掛ら
ず、ヘリウムやネオンを別途導入するのに比べて大幅な
コストダウンを図れる。As a result, the working gas VG of the low temperature valve 6 mainly containing the low boiling point component gas is obtained. This working gas VG concentrates the non-condensable gas UG which is not condensed in the main condenser 10 of the air liquefaction separation device 1.
Since it is obtained by refining, it does not contain carbon dioxide gas and water that solidify at low temperature, oxygen and argon that liquefy, or hydrogen and hydrocarbon that have the risk of combustion and explosion. It has excellent properties as a working gas VG. Further, since the non-condensable gas UG in the main condenser 10 which has been conventionally released into the atmosphere is used, almost no cost is required, and a significant cost reduction can be achieved as compared with the case of separately introducing helium or neon.
一方コールドボックス９内の低温流体の配管５に設けら
れた低温弁６は、弁体部21と、該弁体部21を開閉駆動す
る駆動部22と、弁体部21の開度を制御するポジショナ23
とで構成されている。On the other hand, the low temperature valve 6 provided in the pipe 5 for the low temperature fluid in the cold box 9 controls the valve body portion 21, the drive portion 22 that drives the valve body portion 21 to open and close, and the opening degree of the valve body portion 21. Positioner 23
It consists of and.
ポジショナ23は、弁棒24に接続されたフィードバックレ
バー25により弁体部21の開度を検出し、別に設けられた
流量調節器からの開度信号26と比較し、駆動部22に供給
する作動ガスVGの流量（圧力）を調節して弁体部21の開
度を制御する。The positioner 23 detects the opening degree of the valve body portion 21 by the feedback lever 25 connected to the valve rod 24, compares it with the opening degree signal 26 from the separately provided flow rate controller, and supplies it to the drive portion 22. The opening degree of the valve body portion 21 is controlled by adjusting the flow rate (pressure) of the gas VG.
この低温弁６を作動させる作動ガスVGは、次に説明する
循環系統27により低温弁６に供給される。The working gas VG for operating the low temperature valve 6 is supplied to the low temperature valve 6 by the circulation system 27 described below.
不凝縮ガスUGを濃縮・精製した後の作動ガスVGは、流量
計28で流量を測定され、調節弁29で流量を調節されて吸
入リザーバ30に導入される。次いで作動ガスVGは、圧縮
機31により作動圧まで昇圧され、吐出リザーバ32を経て
コールドボックス９内に導入される。コールドボックス
９内に導入された作動ガスVGは、熱交換器８で低温流体
と略同じ作動温度に冷却されてポジショナ23に導入さ
れ、該ポジショナ23により圧力を調節されて駆動部22に
供給される。The working gas VG after concentration / purification of the non-condensed gas UG is introduced into the intake reservoir 30 after the flow rate is measured by the flow meter 28 and the flow rate is adjusted by the control valve 29. Next, the working gas VG is pressurized to the working pressure by the compressor 31, and introduced into the cold box 9 through the discharge reservoir 32. The working gas VG introduced into the cold box 9 is cooled to approximately the same working temperature as the low temperature fluid by the heat exchanger 8 and introduced into the positioner 23, the pressure of which is adjusted by the positioner 23 and the driving gas 22 is supplied. It
ポジショナ23で使用された後の作動ガスVGは、略常圧で
ポジショナ23から導出され、前記熱交換器８で昇温して
コールドボックス９から出て前記吸入リザーバ30に循環
し、再び圧縮機31に導入される。The working gas VG after being used in the positioner 23 is discharged from the positioner 23 at a substantially normal pressure, is heated in the heat exchanger 8, rises from the cold box 9, circulates in the suction reservoir 30, and is again compressed by the compressor. Introduced in 31.
また前記圧縮機31の吐出側と吸入リザーバ30の間には、
圧力調節計33が設けられており、吸入リザーバ30内が負
圧にならないように制御している。Further, between the discharge side of the compressor 31 and the suction reservoir 30,
A pressure regulator 33 is provided to control the suction reservoir 30 so as not to have a negative pressure.
このように、低温弁６の作動ガスVGを密閉式の循環系統
27で循環使用して作動ガスVGの放出をなくすことによ
り、所定量の作動ガス量を得た後は、作動ガスVG、即ち
不凝縮ガスUGの採取量をほとんど零とできるので、前記
不凝縮ガスUGの精製工程16で使用する酸素ガスや冷却水
の使用量も極僅かでよく、運転経費も低廉である。In this way, the working gas VG of the cryogenic valve 6 is closed in the circulation system.
By releasing the working gas VG by circulating it at 27 to obtain a predetermined amount of working gas, the working gas VG, that is, the non-condensing gas UG, can be collected to almost zero. The amount of oxygen gas and cooling water used in the gas UG refining process 16 can be very small, and the operating cost is low.
またこのように循環使用することにより余剰となる不凝
縮ガスを、他の空気液化分離装置の低温弁の作動ガスと
して用いることもでき、複数基の空気液化分離装置が併
設されている場合には、１基のみに不凝縮ガス採取工程
を設置すれば、簡単な配管の接続だけで他の装置に低温
弁の作動ガスを供給できる。In addition, the non-condensed gas that becomes a surplus due to such circulating use can also be used as the working gas of the low temperature valve of another air liquefaction separation device, and when a plurality of air liquefaction separation devices are installed side by side. If the non-condensable gas sampling process is installed in only one unit, the working gas for the cryogenic valve can be supplied to other devices by simply connecting the pipes.
次に作動ガスの組成の一例を説明する。Next, an example of the composition of the working gas will be described.
まず液化酸素の温度−196℃で主凝縮器10の上部に濃縮
される不凝縮ガスUGは、ネオン約4.5％，ヘリウム約1.1
％，水素約1.2％，残部窒素ガスである。次に濃縮器11
に導入され、60mmHgに減圧されて−200℃以下とされた
液化窒素LNにより冷却される。−200℃における窒素ガ
スの分圧は、約0.6ataであるから、この時の不凝縮ガス
UGの全圧を6ataとすると、不凝縮ガスUGの組成は、ネオ
ン約59.5％，ヘリウム約14.6％，水素約15.9％，窒素ガ
ス10.0％となる。First, the non-condensable gas UG concentrated in the upper part of the main condenser 10 at the temperature of liquefied oxygen of −196 ° C. is about 4.5% neon and about 1.1% helium.
%, Hydrogen about 1.2%, and the balance nitrogen gas. Next concentrator 11
Is cooled to 60 ° C. and decompressed to 60 mmHg and cooled to −200 ° C. or lower by liquefied nitrogen LN. The partial pressure of nitrogen gas at -200 ° C is about 0.6ata, so the noncondensable gas at this time is
If the total pressure of UG is 6ata, the composition of non-condensable gas UG is about 59.5% neon, about 14.6% helium, about 15.9% hydrogen, and about 10.0% nitrogen gas.
そして精製工程16により水素が除去されると、ネオン約
70.7％，ヘリウム約17.4％，窒素ガス約11.9％となる。
この組成のガスを低温弁６の作動ガスVGとすることよ
り、液化酸素や液化窒素を低温流体とした低温弁６を作
動させるための、例えば温度−196℃，圧力5Kg/cm2の条
件下でも作動ガスVGが液化することなく、低温弁６の確
実な作動を図ることができる。Then, when hydrogen is removed by the purification step 16, neon
70.7%, helium about 17.4%, nitrogen gas about 11.9%.
By using a gas of this composition as the working gas VG of the low temperature valve 6, for operating the low temperature valve 6 using liquefied oxygen or liquefied nitrogen as a low temperature fluid, for example, under the condition of temperature −196 ° C. and pressure 5 Kg / cm 2 . However, the working gas VG is not liquefied, and the low temperature valve 6 can be operated reliably.
尚、精留塔や低温弁等の各種機器は、一般に用いられて
いる構造のものを適宜に用いることができる。Incidentally, various devices such as a rectification column and a cryogenic valve may have a generally used structure as appropriate.
本発明は以上説明したように、空気液化分離装置の主凝
縮器で凝縮しない不凝縮ガスを採取して濃縮・精製し、
コールドボックス内に配設された低温弁の駆動部を作動
させる作動ガスとしたから、空気液化分離装置の運転と
ともに低温弁用の作動ガスを供給することができる。As described above, the present invention collects non-condensable gas that does not condense in the main condenser of the air liquefaction separation device, concentrates and purifies it,
Since the working gas is used to operate the drive part of the low temperature valve arranged in the cold box, the working gas for the low temperature valve can be supplied together with the operation of the air liquefaction separation device.
また従来放出していた主凝縮器の不凝縮ガスを用いるの
で低コストであり、しかも、主凝縮器の不凝縮ガスを濃
縮・精製して低温弁の駆動部の作動ガスとして用いるの
で、低温で固化する炭酸ガスや水分等、また液化する酸
素等、あるいは燃焼，爆発の危険性を有する水素や炭化
水素等を含まない作動ガスを得ることができるから、低
温弁の作動ガスとして優れた性状を備えている。さらに
作動ガスを循環使用する場合は、不凝縮ガスの採取量を
極僅かとすることができるので、濃縮や精製に用いる酸
素ガス、冷却水等の運転コストもほとんど掛らず、駆動
部を弁体部と共にコールドボックス内に配設した低温弁
の作用効果とともに、より低コストで空気液化分離装置
の運転を行うことが可能となる。In addition, since the non-condensable gas of the main condenser that was conventionally discharged is used, the cost is low.Moreover, since the non-condensable gas of the main condenser is concentrated and purified and used as the working gas of the drive part of the low temperature valve, it can be used at low temperature. Since it is possible to obtain a working gas that does not contain carbon dioxide or water that solidifies, oxygen that liquefies, or hydrogen or hydrocarbon that has the risk of combustion or explosion, it is possible to obtain excellent properties as a working gas for a low temperature valve. I have it. Furthermore, when the working gas is circulated, the amount of non-condensable gas collected can be minimized, so the operating cost of oxygen gas, cooling water, etc. used for concentration and purification is almost zero, and the drive unit is It is possible to operate the air liquefaction separation device at a lower cost, in addition to the effect of the cryogenic valve arranged in the cold box together with the body portion.
図は本発明方法の一実施例を説明するための空気液化分
離装置の要部の系統図である。 １……空気液化分離装置、４……精留塔、５……低温流
体用の配管、６……低温弁、7,8……熱交換器、９……
コールドボックス、10……主凝縮器、11……濃縮器、16
……精製工程、18……精製器、19……冷却器、20……乾
燥器、21……弁体部、22……駆動部、23……ポジショ
ナ、24……弁棒、27……循環系統、31……圧縮機、UG…
…不凝縮ガス、VG……作動ガスFIG. 1 is a system diagram of a main part of an air liquefaction separation device for explaining an embodiment of the method of the present invention. 1 ... Air liquefaction / separation device, 4 ... Fractionation tower, 5 ... Pipe for low temperature fluid, 6 ... Low temperature valve, 7,8 ... Heat exchanger, 9 ...
Cold box, 10 …… Main condenser, 11 …… Concentrator, 16
…… Refining process, 18 …… Refiner, 19 …… Cooler, 20 …… Dryer, 21 …… Valve part, 22 …… Drive part, 23 …… Positioner, 24 …… Valve rod, 27 …… Circulation system, 31 ... Compressor, UG ...
… Non-condensable gas, VG …… Working gas
Claims (3)
低温弁の駆動部とをコールドボックス内に配設した空気
液化分離装置における低温弁の作動ガス供給方法におい
て、主凝縮器で凝縮しない不凝縮ガスを採取して濃縮・
精製し、この濃縮・精製されたガスを作動ガスとして前
記低温弁の駆動部に供給することを特徴とする空気液化
分離装置における低温弁の作動ガス供給方法。1. A method for supplying a working gas for a cryogenic valve in an air liquefaction separation device, wherein a cryogenic valve used in the air liquefaction separation device and a driving part of the cryogenic valve are arranged in a cold box, and the method does not condense in a main condenser. Uncondensed gas is collected and concentrated
A method for supplying a working gas for a low temperature valve in an air liquefaction separation apparatus, characterized by purifying and supplying the concentrated and purified gas as a working gas to a drive section of the low temperature valve.
ることを特徴とする特許請求の範囲第１項記載の空気液
化分離装置における低温弁の作動ガス供給方法。2. The working gas supply method for a cryogenic valve in an air liquefaction separation apparatus according to claim 1, wherein the refining of the non-condensed gas is removal of hydrogen.
えた循環系統を介して前記低温弁の駆動部に循環供給す
ることを特徴とする特許請求の範囲第１項記載の空気液
化分離装置における低温弁の作動ガス供給方法。3. The air liquefaction according to claim 1, wherein the working gas is circulated and supplied to the drive unit of the cryogenic valve through a circulation system including a compressor and a heat exchanger. Method for supplying working gas for cryogenic valve in separation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62278633A JPH0792328B2 (en) | 1987-11-04 | 1987-11-04 | Method for supplying working gas of cryogenic valve in air liquefaction separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62278633A JPH0792328B2 (en) | 1987-11-04 | 1987-11-04 | Method for supplying working gas of cryogenic valve in air liquefaction separation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01121677A JPH01121677A (en) | 1989-05-15 |
| JPH0792328B2 true JPH0792328B2 (en) | 1995-10-09 |
Family
ID=17599993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62278633A Expired - Lifetime JPH0792328B2 (en) | 1987-11-04 | 1987-11-04 | Method for supplying working gas of cryogenic valve in air liquefaction separation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0792328B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100724070B1 (en) | 1999-10-12 | 2007-06-04 | 도토기키 가부시키가이샤 | Composite structure, manufacturing method and apparatus thereof |
| CN116399083A (en) * | 2023-05-26 | 2023-07-07 | 四川美丰梅塞尔气体产品有限公司 | A method and device for improving the recovery rate of carbon dioxide |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6350529Y2 (en) * | 1979-12-24 | 1988-12-26 | ||
| JPS56144382A (en) * | 1980-04-09 | 1981-11-10 | Nippon Oxygen Co Ltd | Gas bearing of expansion turbine for air liquifying separator |
-
1987
- 1987-11-04 JP JP62278633A patent/JPH0792328B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01121677A (en) | 1989-05-15 |
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