JPH0552469A - Operating method of high purity argon tower for air liquefying and separating device and the same device equipped with argon tower - Google Patents

Operating method of high purity argon tower for air liquefying and separating device and the same device equipped with argon tower

Info

Publication number
JPH0552469A
JPH0552469A JP2406035A JP40603590A JPH0552469A JP H0552469 A JPH0552469 A JP H0552469A JP 2406035 A JP2406035 A JP 2406035A JP 40603590 A JP40603590 A JP 40603590A JP H0552469 A JPH0552469 A JP H0552469A
Authority
JP
Japan
Prior art keywords
purity argon
argon
column
reboiler
purity
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.)
Pending
Application number
JP2406035A
Other languages
Japanese (ja)
Inventor
Masami Akehata
正実 明畠
Osamu Utada
修 宇多田
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 JP2406035A priority Critical patent/JPH0552469A/en
Publication of JPH0552469A publication Critical patent/JPH0552469A/en
Pending 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
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04721—Producing pure argon, e.g. recovered from a crude argon column
    • F25J3/04727—Producing pure argon, e.g. recovered from a crude argon column using an auxiliary pure argon column for nitrogen rejection
    • 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
    • F25J3/04793—Rectification, e.g. columns; Reboiler-condenser
    • F25J3/048—Argon recovery
    • F25J3/04806—High purity argon purification

Abstract

PURPOSE:To obtain the operating method of a high purity argon tower, which is capable of producing high purity argon stably even upon reduced capacity operation, in an air liquefying and separating device equipped with the high purity argon tower. CONSTITUTION:In the operating method of a high purity argon tower 4 for an air liquefying and separating device employing crude argon for the heat source of a high purity argon reboiler 5 for a high purity argon tower 4, the high purity argon tower 4 is provided with a high purity argon sub reboiler 20 employing gas except the crude argon as the heat source therefor. The flow rate of gas, introduced into the high purity argon sub reboiler 20 as the heat source therefor, is adjusted based on the change of the flow rate of the curde argon.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、空気液化分離装置の高
純アルゴン塔の運転方法及び高純アルゴン塔を備えた空
気液化分離装置に関し、詳しくは原料空気を液化精留分
離して、該原料空気中の窒素，酸素等と共に高純度のア
ルゴンを製造する設備を備えた空気液化分離装置におい
て、各種製品ガス（液化ガスを含む）の需要に応じて減
量運転を行う場合でも効率よく高純アルゴンを採取でき
る高純アルゴン塔の運転方法及びその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for operating a high-purity argon column of an air-liquefaction separation device and an air-liquefaction separation device equipped with a high-purity argon column. In an air liquefaction separation device equipped with a facility for producing high-purity argon together with nitrogen and oxygen in the raw material air, even when performing volume reduction operation in response to the demand for various product gases (including liquefied gas), high-purity The present invention relates to a method and an apparatus for operating a high purity argon column capable of collecting argon.

【０００２】[0002]

【従来の技術】従来から、原料空気を圧縮，精製，冷却
して精留塔に導入し、液化精留分離して空気中の窒素，
酸素，アルゴン等を製造することが行われている。図２
は、高純アルゴンを製造する空気液化分離装置における
高純アルゴン塔まわりの系統を示している。2. Description of the Related Art Conventionally, raw air is compressed, purified, cooled, introduced into a rectification column, and liquefied and rectified to separate nitrogen in the air,
Oxygen, argon, etc. are manufactured. Figure 2
Shows a system around a high-purity argon column in an air liquefaction separation apparatus for producing high-purity argon.

【０００３】図示しない前処理設備，精留塔，粗アルゴ
ン塔，アルゴン精製設備を経て得られた粗アルゴンは、
管１から熱交換器２に導入されて冷却された後、管３か
ら高純アルゴン塔４の下部に設けられた高純アルゴンリ
ボイラー５に導入され、塔下部の高純液化アルゴンを蒸
発させる熱源となる。高純アルゴンリボイラー５で高純
液化アルゴンと熱交換して液化した粗アルゴンは、管６
を介して高純アルゴン塔４の中段に導入される。Crude argon obtained through a not-shown pretreatment facility, rectification column, crude argon column, and argon purification facility is
After being introduced from the pipe 1 into the heat exchanger 2 and cooled, it is introduced from the pipe 3 into the high purity argon reboiler 5 provided in the lower part of the high purity argon column 4, and a heat source for evaporating the highly pure liquefied argon in the lower part of the column. Becomes The crude argon liquefied by heat exchange with the highly pure liquefied argon in the highly pure argon reboiler 5 is
Is introduced into the middle stage of the high purity argon column 4.

【０００４】前記高純アルゴンリボイラー５で粗アルゴ
ンと熱交換してガス化した高純アルゴンは、高純アルゴ
ン塔４の上昇ガスとなり、塔内を上昇して塔上部の高純
アルゴンコンデンサー７に導入され、管８から該コンデ
ンサー７に導入される液化窒素と熱交換して液化し、高
純アルゴン塔４の還流液となる。高純アルゴン塔４で
は、前記中段に導入される液化粗アルゴンが、前記上昇
ガスと還流液との作用で精留され、塔底部の管９から高
純度の液化アルゴンが製品として採取される。The high-purity argon gas heat-exchanged with the crude argon gas in the high-purity argon reboiler 5 becomes a rising gas of the high-purity argon tower 4, and rises in the tower to a high-purity argon condenser 7 at the top of the tower. It is introduced and liquefied by exchanging heat with the liquefied nitrogen introduced into the condenser 7 from the pipe 8 and becomes the reflux liquid of the high purity argon column 4. In the high-purity argon column 4, the liquefied crude argon introduced into the middle stage is rectified by the action of the ascending gas and the reflux liquid, and the high-purity liquefied argon is collected as a product from the pipe 9 at the bottom of the column.

【０００５】粗アルゴン中の低沸点成分は、前記高純ア
ルゴンリボイラー５及び高純アルゴンコンデンサー７に
おける不凝縮ガスとして、それぞれ管１０，管１１から
排出され、管１０の排ガスは前記熱交換器２で粗アルゴ
ンの冷却源として用いられた後、管１２から導出され
る。The low boiling point components in the crude argon are discharged as non-condensable gases in the high-purity argon reboiler 5 and the high-purity argon condenser 7 from the pipes 10 and 11, respectively, and the exhaust gas from the pipes 10 is discharged from the heat exchanger 2. After being used as a cooling source for the crude argon, the gas is discharged from the tube 12.

【０００６】また、高純アルゴンコンデンサー７に導入
された液化窒素は、前記高純アルゴンと熱交換してガス
化し、窒素ガスとなって管１３に導出され、その一部が
管１４に分岐して前記熱交換器２で粗アルゴンの冷却源
として用いられた後、管１５から導出される。The liquefied nitrogen introduced into the high-purity argon condenser 7 is heat-exchanged with the high-purity argon to be gasified to become nitrogen gas, which is led out to the pipe 13 and part of which is branched to the pipe 14. After being used as a cooling source of crude argon in the heat exchanger 2, it is led out from the pipe 15.

【０００７】一方、この種の装置には、周知のように、
各部の圧力や液量等に応じて弁を開閉し、安定運転を行
うための設備として、圧力指示調節器（ＰＩＣ），液面
指示調節器（ＬＩＣ），差圧計（ＰｄＩ）が設けられて
おり、各部の流量が変化した場合でも、僅かな流量変化
に追随できるように構成されている。On the other hand, in this type of device, as is well known,
A pressure indicator controller (PIC), a liquid level indicator controller (LIC), and a differential pressure gauge (PdI) are provided as equipment for stable operation by opening and closing valves according to the pressure and liquid volume of each part. Therefore, even if the flow rate of each part changes, it is possible to follow a slight change in flow rate.

【０００８】[0008]

【発明が解決しようとする課題】しかしながら、管１か
ら供給される粗アルゴンの流量が減少すると、該粗アル
ゴンと熱交換して生じる高純アルゴン塔４内の上昇ガス
が減り、ついには高純アルゴンの純度低下をきたす。ま
た、運転状態としては、精留塔がシーブトレイの場合
は、該高純アルゴン塔４内の差圧が低下してくるため、
減量運転の幅が大きくなると、塔内の差圧を十分にとる
ことが困難になり、安定運転が不可能になるおそれがあ
る。However, when the flow rate of the crude argon supplied from the tube 1 is reduced, the amount of ascending gas in the high purity argon column 4 generated by heat exchange with the crude argon is reduced, and finally the high purity is increased. This causes a decrease in the purity of argon. Further, as an operating state, when the rectification column is a sieve tray, the differential pressure in the high-purity argon column 4 decreases,
If the width of the reduction operation becomes large, it becomes difficult to secure a sufficient differential pressure in the column, and stable operation may become impossible.

【０００９】そこで本発明は、減量運転により粗アルゴ
ンの供給量が減少した場合でも高純アルゴン塔を安定し
た状態で運転でき、高純アルゴンを効率よく採取できる
空気液化分離装置の高純アルゴン塔の運転方法及び高純
アルゴン塔を備えた空気液化分離装置を提供することを
目的としている。Therefore, the present invention provides a high-purity argon column of an air liquefaction / separation device capable of operating the high-purity argon column in a stable state even when the supply amount of crude argon is reduced by the reduced-volume operation and efficiently collecting high-purity argon. It is an object of the present invention to provide an air liquefaction separation apparatus equipped with the above operating method and a high purity argon column.

【００１０】[0010]

【課題を解決するための手段】上記した目的を達成する
ため、本発明の空気液化分離装置の高純アルゴン塔の運
転方法は、アルゴンを精製する高純アルゴン塔を備え、
該高純アルゴン塔の高純アルゴンリボイラーの熱源に粗
アルゴンを使用する空気液化分離装置の高純アルゴン塔
の運転方法において、前記高純アルゴン塔に、粗アルゴ
ン以外のガスを熱源とする高純アルゴンサブリボイラー
を設けるとともに、前記粗アルゴンの流量変化に基づい
て、前記高純アルゴンサブリボイラーに熱源として導入
するガスの流量を調節することを特徴としている。In order to achieve the above object, a method for operating a high purity argon column of an air liquefaction separation apparatus of the present invention comprises a high purity argon column for purifying argon,
In the method for operating a high-purity argon column of an air liquefaction separation apparatus using crude argon as a heat source for a high-purity argon reboiler of the high-purity argon column, the high-purity argon column uses a high-purity argon gas as a heat source. An argon sub-reboiler is provided, and the flow rate of gas introduced into the high-purity argon sub-reboiler as a heat source is adjusted based on the change in the flow rate of the crude argon.

【００１１】また、本発明の高純アルゴン塔を備えた空
気液化分離装置は、アルゴンを精製する高純アルゴン塔
を備え、該高純アルゴン塔に、粗アルゴンを熱源として
使用する高純アルゴンリボイラーを有する空気液化分離
装置において、前記高純アルゴン塔に、粗アルゴン以外
のガスを熱源とする高純アルゴンサブリボイラーを設け
るとともに、前記粗アルゴンの流量を検出する流量検出
手段又は高純アルゴン塔差圧検出手段と、該検出手段の
検出値に基づいて、前記高純アルゴンサブリボイラーに
熱源として導入するガスの流量を調節する流量調節手段
とを設けたことを特徴としている。Further, the air liquefaction / separation apparatus equipped with the high purity argon column of the present invention comprises a high purity argon column for purifying argon, and the high purity argon column uses crude argon as a heat source for the high purity argon reboiler. In the air liquefaction separation apparatus having, in the high-purity argon column, a high-purity argon sub-reboiler using a gas other than crude argon as a heat source is provided, and a flow rate detecting means or a high-purity argon column difference for detecting the flow rate of the crude argon. It is characterized in that a pressure detecting means and a flow rate adjusting means for adjusting the flow rate of the gas introduced as a heat source into the high-purity argon sub-reboiler are provided based on the detection value of the detecting means.

【００１２】[0012]

【作 用】上記構成によれば、減量運転又は粗アルゴン
の一部を他に導出することにより粗アルゴンの量が減少
した場合でも、前記高純アルゴンサブリボイラーに熱源
となるガス、例えば窒素ガス等を導入することにより、
塔内の上昇ガスとして必要な量の高純アルゴンのガス化
を行えるので、高純アルゴン塔の運転状態を最適な状態
に保つことができる。[Operation] According to the above configuration, even when the amount of crude argon is reduced by reducing the amount of the crude argon or by deriving a part of the crude argon to another, a gas that becomes a heat source for the high-purity argon sub-reboiler, for example, nitrogen gas. By introducing
Since the amount of high-purity argon required as the rising gas in the column can be gasified, the operating state of the high-purity argon column can be maintained in an optimum state.

【００１３】[0013]

【実施例】以下、本発明を、図１に示す一実施例に基づ
いて、さらに詳細に説明する。尚、原料空気の圧縮，精
製，冷却を行う前処理設備、窒素，酸素を採取する精留
塔、該精留塔からアルゴン含量が多いガスを抜き出して
アルゴンを粗分離する粗アルゴン塔等の各種設備は、従
来から周知の構成を採用することができるので、その詳
細な図示及び説明を省略する。さらに前記図１に示した
従来例装置と同一構成要素のものにも同一符号を付して
詳細な説明を省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below based on an embodiment shown in FIG. Various types of equipment such as a pretreatment facility for compressing, refining, and cooling the raw material air, a rectification column for collecting nitrogen and oxygen, and a crude argon column for roughly separating argon by extracting a gas having a large argon content from the rectification column Since the equipment can have a conventionally known configuration, detailed illustration and description thereof will be omitted. Further, the same components as those of the conventional apparatus shown in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

【００１４】本実施例装置は、前述の高純アルゴン塔４
の下部に、高純アルゴンサブリボイラー２０を設けると
ともに、高純アルゴン塔４内の差圧を検出する差圧指示
調節計（ＰｄＩＣ）２１と、該差圧指示調節計２１の出
力により作動する調節弁２２とを設けたものである。The apparatus of this embodiment is the same as the high purity argon column 4 described above.
A high-purity argon sub-reboiler 20 is provided in the lower part of the, and a differential pressure indicating controller (PdIC) 21 for detecting the differential pressure in the high-purity argon column 4 and a control operated by the output of the differential pressure indicating controller 21. And a valve 22.

【００１５】前記高純アルゴンサブリボイラー２０は、
粗アルゴン以外のガス、例えば精留塔にて得られた窒素
ガスを熱源として高純アルゴン塔４下部の高純液化アル
ゴンをガス化するものであって、高純液化アルゴンは、
管２３により塔下部から導出されて高純アルゴンサブリ
ボイラー２０に導入され、熱源ガスである窒素ガスと熱
交換してガス化した後、管２４により高純アルゴン塔４
内に戻される。また、熱源となる窒素ガスは、管２５か
ら高純アルゴンサブリボイラー２０に導入され、高純液
化アルゴンと熱交換して液化した後、管２６から前記調
節弁２２を介して前記管８の液化窒素と合流して前記高
純アルゴンコンデンサー７に導入される。上記熱源とな
る窒素ガスの量は、前記調節弁２２の開度により調節さ
れる。The high purity argon sub-reboiler 20 is
A gas other than crude argon, for example, nitrogen gas obtained in a rectification column is used as a heat source to gasify highly pure liquefied argon in the lower part of the highly pure argon column 4, and the highly pure liquefied argon is
After being introduced from the lower part of the tower by a pipe 23 and introduced into the high-purity argon sub-reboiler 20 and being heat-exchanged with nitrogen gas as a heat source gas to be gasified, a high-purity argon tower 4 is introduced by a pipe 24.
Returned inside. Nitrogen gas, which is a heat source, is introduced into the high-purity argon sub-reboiler 20 from the pipe 25, heat-exchanges with high-purity liquefied argon to liquefy, and then liquefies the pipe 8 from the pipe 26 through the control valve 22. It is merged with nitrogen and introduced into the high purity argon condenser 7. The amount of nitrogen gas serving as the heat source is adjusted by the opening degree of the control valve 22.

【００１６】管１から供給される粗アルゴンが減少する
と、該粗アルゴンを熱源としている前記高純アルゴンリ
ボイラー５のリボイル量が減少するので、高純アルゴン
塔４内の差圧が低下する。この差圧の低下は、前記差圧
指示調節計２１により検出され、前記調節弁２２を開く
信号が出力される。これにより、調節弁２２が開いて高
純アルゴンサブリボイラー２０に窒素ガスが導入され、
該サブリボイラー２０におけるリボイル量が増加する。
即ち、塔下部の高純液化アルゴンの一部が管２３を介し
て高純アルゴンサブリボイラー２０に導入されて蒸発
し、ガス化して管２４から高純アルゴン塔４内に戻さ
れ、塔内の上昇ガスとなる。When the amount of crude argon supplied from the pipe 1 decreases, the amount of reboil in the high purity argon reboiler 5 using the crude argon as a heat source decreases, so that the differential pressure in the high purity argon column 4 decreases. This decrease in differential pressure is detected by the differential pressure indicating controller 21, and a signal for opening the adjusting valve 22 is output. As a result, the control valve 22 is opened and nitrogen gas is introduced into the high-purity argon sub-reboiler 20,
The amount of reboil in the sub reboiler 20 increases.
That is, a part of the high-purity liquefied argon in the lower part of the column is introduced into the high-purity argon sub-reboiler 20 through the pipe 23, vaporized, gasified and returned from the pipe 24 into the high-purity argon column 4, and the inside of the column It becomes rising gas.

【００１７】従って、前記高純アルゴンリボイラー５の
リボイル量の減少を、上記高純アルゴンサブリボイラー
２０のリボイル量の増加で補う状態となり、減量運転時
においても高純アルゴン塔４の差圧を一定に調整するこ
とができる。尚、粗アルゴンの減少により生じる各部の
流量変化や圧力変化は、前記圧力指示調節器（ＰＩＣ）
及び液面指示調節器（ＬＩＣ）が作動して所定の範囲内
に調節する。Therefore, the decrease in the reboil amount of the high-purity argon reboiler 5 is compensated by the increase in the reboil amount of the high-purity argon sub-reboiler 20, and the differential pressure of the high-purity argon column 4 is kept constant even during the reduction operation. Can be adjusted to. In addition, the flow rate change and the pressure change of each part caused by the decrease of the crude argon are caused by the pressure indicating controller (PIC).
And the liquid level indicator controller (LIC) is activated to adjust within a predetermined range.

【００１８】例えば、管１から供給される粗アルゴンの
状態が、定格時に、圧力約３kg／cm2 Ｇ，流量約２２０
Ｎｍ3 ／ｈ、最減量運転時に、圧力約３kg／cm2 Ｇ，流
量約６０Ｎｍ3 ／ｈの装置の場合、定格運転時の高純ア
ルゴン塔４内の差圧は、約１７００mmAqであるが、減量
運転時には、粗アルゴンの流量の減少とともに、前述の
ように上昇ガスが減少するので、そのままでは差圧が低
下するとともに、安定した運転を行うことができなくな
る。ここで本実施例装置では、前記差圧指示調節計２１
が上記差圧の低下を検出して前記調節弁２２を開き、最
減量時には高純アルゴンサブリボイラー２０に圧力約５
kg／cm2Ｇ，温度−１７６℃の窒素ガス約２００Ｎｍ3
／ｈを導入する。これにより、塔下部の高純液化アルゴ
ンの所定量を高純アルゴンサブリボイラー２０で蒸発さ
せて上昇ガスとすることができ、差圧を定格時と同じ約
１７００mmAqにすることができる。For example, when the state of the crude argon supplied from the tube 1 is the rated value, the pressure is about 3 kg / cm 2 G and the flow rate is about 220.
Nm 3 / h, at most turndown, the case of the apparatus at a pressure of about 3 kg / cm 2 G, a flow rate of about 60 Nm 3 / h, the pressure difference of high purity argon tower 4 at the time of rated operation is about 1700MmAq, During the reduction operation, as the flow rate of the crude argon decreases, the ascending gas decreases as described above, so that the differential pressure decreases as it is, and stable operation cannot be performed. Here, in the apparatus of this embodiment, the differential pressure indicating controller 21
Detects the decrease in the differential pressure and opens the control valve 22, and when the amount is reduced to the maximum, the high pure argon sub-reboiler 20 is pressurized to about 5
About 200 Nm 3 of nitrogen gas at kg / cm 2 G and temperature of -176 ° C
/ H is introduced. As a result, a predetermined amount of highly pure liquefied argon in the lower part of the tower can be vaporized by the highly pure argon sub-reboiler 20 to form an ascending gas, and the differential pressure can be set to about 1700 mmAq, which is the same as the rated pressure.

【００１９】尚、本発明は上記実施例に限るものではな
く、例えば高純アルゴンサブリボイラーの形態は、上記
のように高純アルゴン塔の外部に熱交換器を設置した外
置き式でも良いが、高純アルゴン塔の下部に巻き管を内
蔵させて熱源ガスの流路とした巻き管式や、高純液化ア
ルゴンの流路と、粗アルゴンの流路と、熱源ガスの流路
の３流路を有するプレートフィン熱交換器を塔内に設置
するようにしても良い。また、上記実施例では、粗アル
ゴンの流量変化を差圧計で間接的に測定しているが、流
量計により粗アルゴンの流量を直接測定しても良い。さ
らに高純アルゴンサブリボイラーの熱源となるガスは、
上記窒素ガスの他、空気液化分離装置の各部を流れるガ
ス（液化ガスも含む）の中で高純液化アルゴンを適当量
蒸発させることができるものならば、原料空気や酸素，
排ガス等、様々なものを用いることが可能であり、その
導入量は、温度や圧力に応じて適宜設定すれば良い。The present invention is not limited to the above embodiment, and for example, the form of the high purity argon subboiler may be an external type in which a heat exchanger is installed outside the high purity argon column as described above. , A winding tube type in which a winding tube is built in the lower part of the high-purity argon column as a heat source gas flow path, or a high-purity liquefied argon flow path, a crude argon flow path, and a heat source gas flow path A plate fin heat exchanger having a passage may be installed in the tower. Further, in the above embodiment, the change in the flow rate of crude argon is indirectly measured by the differential pressure gauge, but the flow rate of crude argon may be directly measured by the flow meter. Furthermore, the gas that becomes the heat source of the high-purity argon sub-reboiler is
In addition to the above-mentioned nitrogen gas, as long as it is possible to evaporate an appropriate amount of highly pure liquefied argon among the gases (including liquefied gas) flowing through each part of the air liquefaction separation device, raw air, oxygen,
It is possible to use various substances such as exhaust gas, and the amount to be introduced may be set appropriately according to the temperature and pressure.

【００２０】[0020]

【発明の効果】以上説明したように、本発明によれば、
減量運転等により粗アルゴンの流量が減少した場合で
も、高純アルゴンサブリボイラーに熱源ガスを流量を自
動的に制御して導入し、十分な量の上昇ガスを得ること
ができるので、高純アルゴン塔の差圧を常に一定に保つ
ことができ、製品高純アルゴンの純度低下をきたすこと
なく安定した効率の良い運転を行うことができる。従っ
て、高純アルゴン塔を備えた空気液化分離装置におい
て、減量運転時にも安定して高純アルゴンを生産するこ
とができる。As described above, according to the present invention,
Even if the flow rate of crude argon decreases due to a reduction operation, etc., the heat source gas can be automatically introduced into the high-purity argon sub-reboiler by controlling the flow rate to obtain a sufficient amount of rising gas. The differential pressure in the column can be kept constant at all times, and stable and efficient operation can be performed without deteriorating the purity of the product high-purity argon. Therefore, in the air liquefaction separation device equipped with the high-purity argon column, high-purity argon can be stably produced even during the reduction operation.

【図面の簡単な説明】[Brief description of drawings]

【図１】 本発明の一実施例を示す空気液化分離装置の
要部の系統図である。FIG. 1 is a system diagram of a main part of an air liquefaction separation device showing an embodiment of the present invention.

【図２】 従来の空気液化分離装置の一例を示す要部の
系統図である。FIG. 2 is a system diagram of essential parts showing an example of a conventional air liquefaction separation device.

【符号の説明】[Explanation of symbols]

２…熱交換器 ４…高純アルゴン塔 ５…高純アル
ゴンリボイラー ７…高純アルゴンコンデンサー ２０…高純アルゴン
サブリボイラー ２１…差圧指示調節計 ２２…調節弁2 ... Heat exchanger 4 ... High-purity argon tower 5 ... High-purity argon reboiler 7 ... High-purity argon condenser 20 ... High-purity argon sub-reboiler 21 ... Differential pressure indicating controller 22 ... Control valve

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 アルゴンを精製する高純アルゴン塔を備
え、該高純アルゴン塔の高純アルゴンリボイラーの熱源
に粗アルゴンを使用する空気液化分離装置の高純アルゴ
ン塔の運転方法において、前記高純アルゴン塔に、粗ア
ルゴン以外のガスを熱源とする高純アルゴンサブリボイ
ラーを設けるとともに、前記粗アルゴンの流量変化に基
づいて、前記高純アルゴンサブリボイラーに熱源として
導入するガスの流量を調節することを特徴とする空気液
化分離装置の高純アルゴン塔の運転方法。1. A method for operating a high-purity argon column of an air liquefaction separation apparatus, comprising a high-purity argon column for purifying argon, wherein crude argon is used as a heat source of a high-purity argon reboiler of the high-purity argon column. The pure argon column is provided with a high-purity argon sub-reboiler using a gas other than crude argon as a heat source, and the flow rate of the gas introduced into the high-purity argon sub-reboiler as a heat source is adjusted based on the change in the flow rate of the crude argon. A method for operating a high-purity argon column of an air liquefaction separation device, which is characterized by the above. 【請求項２】 前記粗アルゴンの流量変化を、前記高純
アルゴン塔の上部と下部との差圧の変化として検出する
ことを特徴とする請求項１記載の空気液化分離装置の高
純アルゴン塔の運転方法。2. The high-purity argon column of the air liquefaction separation apparatus according to claim 1, wherein a change in the flow rate of the crude argon is detected as a change in the differential pressure between the upper part and the lower part of the high-purity argon column. Driving method. 【請求項３】 アルゴンを精製する高純アルゴン塔を備
え、該高純アルゴン塔に、粗アルゴンを熱源として使用
する高純アルゴンリボイラーを有する空気液化分離装置
において、前記高純アルゴン塔に、粗アルゴン以外のガ
スを熱源とする高純アルゴンサブリボイラーを設けると
ともに、前記粗アルゴンの流量を検出する流量検出手段
又は高純アルゴン塔差圧検出手段と、該検出手段の検出
値に基づいて、前記高純アルゴンサブリボイラーに熱源
として導入するガスの流量を調節する流量調節手段とを
設けたことを特徴とする高純アルゴン塔を備えた空気液
化分離装置。3. An air liquefaction separation apparatus comprising a high-purity argon column for purifying argon, wherein the high-purity argon column has a high-purity argon reboiler using crude argon as a heat source. With a high-purity argon sub-reboiler using a gas other than argon as a heat source, a flow rate detecting means or a high-purity argon column differential pressure detecting means for detecting the flow rate of the crude argon, and based on the detection value of the detecting means, An air liquefaction separation apparatus equipped with a high-purity argon column, characterized in that the high-purity argon sub-reboiler is provided with flow rate adjusting means for adjusting the flow rate of gas introduced as a heat source. 【請求項４】 前記高純アルゴンサブリボイラーが、前
記高純アルゴン塔に内蔵されていることを特徴とする請
求項３記載の高純アルゴン塔を備えた空気液化分離装
置。4. An air liquefaction separation apparatus equipped with a high purity argon column according to claim 3, wherein the high purity argon sub-reboiler is incorporated in the high purity argon column.
JP2406035A 1990-12-25 1990-12-25 Operating method of high purity argon tower for air liquefying and separating device and the same device equipped with argon tower Pending JPH0552469A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2406035A JPH0552469A (en) 1990-12-25 1990-12-25 Operating method of high purity argon tower for air liquefying and separating device and the same device equipped with argon tower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2406035A JPH0552469A (en) 1990-12-25 1990-12-25 Operating method of high purity argon tower for air liquefying and separating device and the same device equipped with argon tower

Publications (1)

Publication Number Publication Date
JPH0552469A true JPH0552469A (en) 1993-03-02

Family

ID=18515663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2406035A Pending JPH0552469A (en) 1990-12-25 1990-12-25 Operating method of high purity argon tower for air liquefying and separating device and the same device equipped with argon tower

Country Status (1)

Country Link
JP (1) JPH0552469A (en)

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