JPH0379960A - Apparatus for removal of hydrogen or the like in helium refrigerated liquefaction machine - Google Patents

Apparatus for removal of hydrogen or the like in helium refrigerated liquefaction machine

Info

Publication number
JPH0379960A
JPH0379960A JP21579489A JP21579489A JPH0379960A JP H0379960 A JPH0379960 A JP H0379960A JP 21579489 A JP21579489 A JP 21579489A JP 21579489 A JP21579489 A JP 21579489A JP H0379960 A JPH0379960 A JP H0379960A
Authority
JP
Japan
Prior art keywords
hydrogen
valve
helium
trap
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.)
Granted
Application number
JP21579489A
Other languages
Japanese (ja)
Other versions
JPH0686963B2 (en
Inventor
Hiroshi Oya
大矢　博志
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.)
CHIYOUDENDOU HATSUDEN KANREN KIKI ZAIRYO GIJUTSU KENKYU KUMIAI
Chodendo Hatsuden Kanren Kiki Zairyo Gijutsu Kenkyu Kumiai
Original Assignee
CHIYOUDENDOU HATSUDEN KANREN KIKI ZAIRYO GIJUTSU KENKYU KUMIAI
Chodendo Hatsuden Kanren Kiki Zairyo Gijutsu Kenkyu Kumiai
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 CHIYOUDENDOU HATSUDEN KANREN KIKI ZAIRYO GIJUTSU KENKYU KUMIAI, Chodendo Hatsuden Kanren Kiki Zairyo Gijutsu Kenkyu Kumiai filed Critical CHIYOUDENDOU HATSUDEN KANREN KIKI ZAIRYO GIJUTSU KENKYU KUMIAI
Priority to JP21579489A priority Critical patent/JPH0686963B2/en
Publication of JPH0379960A publication Critical patent/JPH0379960A/en
Publication of JPH0686963B2 publication Critical patent/JPH0686963B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0244—Operation; Control and regulation; Instrumentation
    • F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
    • F25J1/0251—Intermittent or alternating process, so-called batch process, e.g. "peak-shaving"
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0005—Light or noble gases
    • F25J1/0007—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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/0035—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work
    • F25J1/0037—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work of a return stream
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0201—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration
    • F25J1/0202—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration in a quasi-closed internal refrigeration loop
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0203—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle
    • F25J1/0208—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle in combination with an internal quasi-closed refrigeration loop, e.g. with deep flash recycle loop
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0294—Multiple compressor casings/strings in parallel, e.g. split arrangement
    • 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
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • 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
    • F25J2205/20—Processes or apparatus using other separation and/or other processing means using solidification of components
    • 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
    • F25J2220/02—Separating impurities in general from the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/04—Internal refrigeration with work-producing gas expansion loop
    • F25J2270/06—Internal refrigeration with work-producing gas expansion loop with multiple gas expansion loops

Abstract

PURPOSE:To remove hydrogen or the like from a refrigerated liquefaction device without suffering helium leakage and on a stable basis by providing a trap for collecting hydrogen or the like between a heat exchanger and a J-T valve and fitting the trap with a discharge valve. CONSTITUTION:A trap for collecting hydrogen is provided between a lowermost heat exchanger 7 and a J-T valve 8, the trap 20 is fitted with a discharge valve 21 and a heater 12' for heating the hydrogen adhered between the trap 20 and the J-T valve 8 and to this valve is provided. In normal operating condition, the hydrogen which has invaded helium is cooled, its liquefaction is commenced at an intermediate heat exchanger 5 and the hydrogen is frozen and attached between heat exchangers 6 and 7 and J-T valve 8. The hydrogen frozen and attached to a passage from the outlet of the trap 20 to the J-T valve 8 is gradually heated and thawed by the heater 12' provided therebetween so as to be received in the trap 20 for removal thereof, while the helium is performing the removal operation of the hydrogen when it is passing through a precooling bypass valve 24. After removal of the hydrogen causing hindrance to the helium passage, the precooling bypass valve 24 is closed and the J-T valve 8 is opened to cause a switching action to helium liquefaction to take place.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は長期連続運転が必要な超電導電力応用機器に付
属する産業用ヘリウム冷凍機及び−般のヘリウム冷凍液
化機等に適用できるヘリウム冷凍液化機系内の水素等の
除去装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is a helium refrigeration and liquefaction system that can be applied to industrial helium refrigerators attached to superconducting power application equipment that require long-term continuous operation, and general helium refrigeration and liquefaction equipment. This relates to a device for removing hydrogen, etc. within the machine system.

［従来の技術］ 最近超電導電力を応用した機器の開発が盛んになって来
ている。[Prior Art] Recently, the development of devices that apply superconducting power has become active.

一般に超電導現象が生ずるのは、絶対零度に近い極低温
であるので、全ての物質の中で、沸点が最も低い（約４
＠Ｋ）ヘリウムは極低温を作り出す上に最適である。Generally, superconductivity occurs at extremely low temperatures close to absolute zero, so of all substances, the boiling point is the lowest (approximately 4
@K) Helium is ideal for creating extremely low temperatures.

従って、超電導電力応用機器の低温を保つ上に必要な機
器としてヘリウムの冷凍液化機か付属しているものが多
い。Therefore, in order to maintain the low temperature of superconducting power application equipment, a helium refrigeration and liquefaction machine is often included.

ヘリウムの冷凍液化機１は一般に第３図に示す如き例え
ば６基の熱交換５２．３．４，５．６．７を循環する工
程を有し、Ｊ−Ｔ弁（ジュール・トムソン弁）８からヘ
リウムを噴出させジュール・トムソン効果でヘリウムを
液化しデユワ瓶９に溜めるようになっている。The helium refrigeration and liquefaction machine 1 generally has a process of circulating through six heat exchangers 52, 3, 4, 5, 6, 7 as shown in FIG. Helium is spouted out, the helium is liquefied by the Joule-Thomson effect, and the helium is stored in the dewar bottle 9.

液化ヘリウムが所要量デユワ瓶９に溜ると、取出口ｌＯ
より取出され本体に供給される。又デユワ瓶９には液面
計１１が設置されており、所要の液高以上となるε液面
制御ヒーター１２が自動的に作動し始め、該ヒーターｉ
２の加温によってヘリウムの液化が止まり液面は一定に
保たれる。When the required amount of liquefied helium has accumulated in the dewar bottle 9, the outlet lO
It is taken out and supplied to the main body. In addition, a liquid level gauge 11 is installed in the dewar bottle 9, and when the liquid level exceeds the required level, the ε liquid level control heater 12 automatically starts operating, and the heater i
By heating step 2, the liquefaction of helium is stopped and the liquid level is kept constant.

しかるに前記ヘリウム冷凍液化機ｌを循環するヘリウム
ガス中には、外部より供給されるヘリウム中の不純物と
して、又系内低圧部に於て外部よりの洩れ込みにより、
水分、空気が混入し、更に給油式圧縮機１３からは潤滑
油及びその分解ガスである一酸化炭素、炭酸ガス、及び
水素等が混入して来る。なお水素は液化機１を構成する
金属中からも放出される可能性がある。However, in the helium gas circulating in the helium refrigeration and liquefaction machine 1, there are impurities in the helium supplied from the outside, and due to leakage from the outside in the low pressure part of the system.
Moisture and air are mixed in, and lubricating oil and its decomposed gases such as carbon monoxide, carbon dioxide gas, and hydrogen are also mixed in from the oil-filled compressor 13. Note that hydrogen may also be released from the metal constituting the liquefier 1.

以上の不純物はいずれもヘリウムより液化及び固化温度
が高いので工程中の低温部分で液化し、更に凍結、固化
し、工程の流路を閉塞し、長期間の連続運転の際には、
ヘリウムガスの流通を止めてしまうという現象が起る。All of the above impurities have higher liquefaction and solidification temperatures than helium, so they liquefy in the low-temperature part of the process, and then freeze and solidify, blocking the flow path of the process, and during long-term continuous operation.
A phenomenon occurs in which the flow of helium gas is stopped.

前記の現象を防止するために、水分、空気に対しては工
程途中に乾燥器１４及び液体窒素などの寒冷を利用した
低温吸着器１５．１６を設置し、又油分、−酸化炭素、
炭酸ガス、炭化水素ガス及び水素等の除去には、高性能
油分離吸着器１７、前記液体窒素による低温吸着器１５
．１Ｂ　、触媒により前記ガスを酸化する触媒反応槽１
８、乾燥器１４等が設置されている。In order to prevent the above-mentioned phenomenon, a dryer 14 and low-temperature absorbers 15 and 16 using cold water such as liquid nitrogen are installed in the middle of the process for moisture and air, and also for oil, -carbon oxide,
For removing carbon dioxide gas, hydrocarbon gas, hydrogen, etc., a high-performance oil separation adsorber 17 and a low-temperature adsorber 15 using liquid nitrogen are used.
．． 1B, catalytic reaction tank 1 that oxidizes the gas with a catalyst;
8. A dryer 14 etc. are installed.

しかし一般に液体窒素（沸点７７”Ｋ）以下の低沸点ガ
ス（ネオン２７°に１水素２０°Ｋ）は除去しきれず特
に水素は長期連続運転に於ては固化堆積し、蓄積量が増
加して無視出来なくなり、深冷部で凍結、閉塞し始めヘ
リウムの循環に支障をきたすようになる。斯かる原には
一旦運転を停止し、深冷部を加温して凍結、固化した水
素をガス化し、触媒反応槽１８を通して除去するが、第
４図に示す如くに例えば熱交換器５と熱交換器６の間に
２０”Ｋの更に低温の吸着器１９を設けて、該２０＠に
低温吸盾器１９に水素を吸若させるような方法を取り水
素を除去することも行われている。なお、第３図、ｍ４
図における符号２４は予冷用バイパス弁、２５は膨張タ
ービン、２６はフロン冷凍機、２７は温度計である。However, in general, low boiling point gases (neon 27° to 1 hydrogen 20°K) below liquid nitrogen (boiling point 77"K) cannot be removed completely, and hydrogen in particular solidifies and accumulates during long-term continuous operation, increasing the amount of accumulation. It can no longer be ignored, and it begins to freeze and block in the deep-chilled part, which interferes with the circulation of helium.In such cases, the operation must be temporarily stopped, and the deep-chilled part is heated to remove the frozen and solidified hydrogen from gas. As shown in FIG. 4, for example, an adsorber 19 at a lower temperature of 20"K is installed between the heat exchanger 5 and the heat exchanger 6, and the lower temperature is removed through the catalytic reaction tank 18. Hydrogen is also removed by using a method in which the shield absorber 19 absorbs hydrogen. In addition, Fig. 3, m4
In the figure, reference numeral 24 is a pre-cooling bypass valve, 25 is an expansion turbine, 26 is a fluorocarbon refrigerator, and 27 is a thermometer.

［発明が解決しようとする課題〕 しかし、前記の触媒反応槽１８に於ける酸化の際には、
液化機ｌの運転を一旦停止しなければならず、温度もか
なり上昇するので、再び液化運転を開始するまでには長
時間を要し、更にヘリウム再生循環のための動力が多く
消費される。[Problems to be Solved by the Invention] However, during the oxidation in the catalytic reaction tank 18,
Since the operation of the liquefier 1 must be temporarily stopped and the temperature rises considerably, it takes a long time to start the liquefaction operation again, and moreover, a large amount of power is consumed for helium regeneration circulation.

更に連続して液化ヘリウムを本体に供給するためには、
切替用の予備系（熱交換器、Ｊ−Ｔ弁及びデユワ瓶）が
必要であり、設備増となるばか運転操作も複雑化する。In order to further continuously supply liquefied helium to the main body,
A standby system for switching (heat exchanger, J-T valve, and dewar bottle) is required, which requires additional equipment and complicates operation.

又２０’に低温吸着器１９を設置する際にも、連続して
冷熱の供給を必要こする際には、第５図に示す如く切換
式予備の２０”Ｋ低温吸着器ｉ９を設ける必要があり、
設備増となるに加えて、切替再生にまつわる信頼性の低
下、深冷部における加熱両生に伴う熱ロスの増大、固化
した低沸点ガスの付着による目詰り等が起る。Also, when installing the low-temperature adsorber 19 at 20', it is necessary to install a switching type spare 20"K low-temperature adsorber i9 as shown in Fig. 5, if a continuous supply of cold energy is required. can be,
In addition to the increase in equipment, there will be a decrease in reliability related to switching regeneration, an increase in heat loss due to both heating and cooling in the deep cold section, and clogging due to the adhesion of solidified low boiling point gas.

本発明は従来技術のかかる欠点に鑑み案出されたもので
、簡単ム設備だけで、触媒反応槽等が不要となり設備費
が減少し、長期連続運転が可能で、操作中止期間が短く
、ヘリウムの流出のない安定した冷凍液化機系内の水素
等の除去装置を提供することを目的としたちのである。The present invention was devised in view of the drawbacks of the prior art, and requires only simple equipment, eliminating the need for a catalytic reaction tank, etc., reducing equipment costs, enabling long-term continuous operation, shortening the period of discontinuation of operation, and using helium The purpose of this invention is to provide a stable device for removing hydrogen, etc. from a refrigeration liquefaction machine system without leakage.

［課題を解決するための手段］ 本発明はヘリウム冷凍液化機系において、熱交換器とＪ
−Ｔ弁との間に水素等を捕集するトラップを設けると共
に、該トラップに排出弁を設けたものであり、父型にト
ラップにヒーターを設けたもの、及び排出弁の開閉を制
御する温度計を設けたものである。[Means for Solving the Problems] The present invention provides a helium refrigeration and liquefaction machine system in which a heat exchanger and a
- A trap is provided between the T-valve to collect hydrogen, etc., and a discharge valve is provided in the trap, and a heater is provided in the trap in the father type, and a temperature control device that controls the opening and closing of the discharge valve. It is equipped with a meter.

［作　　　用］ ヘリウムガスに随伴して熱交換器を出た固化水素等は途
中のトラップに流入して分離、除去され、熱交換器に凍
結付着した水素等は予冷ｍバイパス回路に切換え循環ヘ
リウムの温度を高めることによって融解し前記トラップ
に流入して分離、除去され、Ｊ−Ｔ弁及びＪ−Ｔ弁とト
ラップ間に凍結何首した水素等はヒーターによって暖め
られて融解し、トラップに流入して分離、除去される。[Function] Solidified hydrogen, etc. that left the heat exchanger accompanied by helium gas flows into a trap in the middle and is separated and removed. Hydrogen, etc. that has frozen and adhered to the heat exchanger is switched to the pre-cooling m bypass circuit and circulated helium. By increasing the temperature, the hydrogen is melted, flows into the trap, is separated and removed, and the J-T valve and the frozen hydrogen between the J-T valve and the trap are warmed by a heater, melted, and flow into the trap. separated and removed.

［実　施　例］ 以下、本発明の実施例を図面を参照しつつ説明する。[Example] Embodiments of the present invention will be described below with reference to the drawings.

第１図及び第２図は本発明の一実施例であり、図中第３
図から第５図と同一の符号を付した部分は同一物を表わ
している。1 and 2 show one embodiment of the present invention, and the third
Parts with the same reference numerals as those in FIG. 5 represent the same parts.

第１図及び第２図に示す如く、最終段の熱交換器７とＪ
−Ｔ弁８の間に水素等を捕集するトラップ２０を設け、
該トラップ２０に排出弁２１を設ける。As shown in FIGS. 1 and 2, the final stage heat exchanger 7 and J
- A trap 20 for collecting hydrogen etc. is provided between the T valves 8,
The trap 20 is provided with a discharge valve 21.

最終段の２基の熱交換器８．７の出入口には、出口と人
口の差圧を測定するための差圧計２２゜２３を設置する
。Differential pressure gauges 22 and 23 are installed at the entrances and exits of the two heat exchangers 8 and 7 in the final stage to measure the differential pressure between the exit and the outlet.

定常運転状態において、ヘリウム中に侵入した水素等は
冷却され、液化が中段の熱交換器５て始まり、更に凍結
付着が熱交換器６，７とＪ−Ｔ弁８の間で発生する。In a steady state of operation, hydrogen and the like that have entered the helium are cooled and liquefaction begins in the middle heat exchanger 5, and further freezing occurs between the heat exchangers 6, 7 and the J-T valve 8.

その際、前記固化水素等のうちヘリウムガスに随伴する
ものは、Ｊ−Ｔ弁８まで到達する前に、前記トラップ２
０に落下し分離されるので、Ｊ−Ｔ弁８の閉塞は防止出
来る。At this time, the solidified hydrogen, etc. that accompanies the helium gas is removed from the trap 2 before reaching the J-T valve 8.
Since it falls to 0 and is separated, blockage of the J-T valve 8 can be prevented.

又熱交換器Ｅｉ、７に凍結、付着した水素等は凍結、付
着が増加するに従って、ヘリウムガスの流通を阻害し、
熱交換器θ、７の出口と入口の差圧が徐々に増大する。In addition, hydrogen etc. that have frozen or adhered to the heat exchanger Ei, 7 obstruct the flow of helium gas as the amount of frozen or adhered increases.
The differential pressure between the outlet and inlet of the heat exchanger θ, 7 gradually increases.

差圧計２２　、２３の読みが規定値まで増大した時点で
、予冷用バイパス弁２４を開き、Ｊ−Ｔ弁８を閉じヘリ
ウムの液化運転から水素等の除去運転に切替え、ヘリウ
ムがデユワ瓶９を通らず、バイパス弁２４を通って循環
するようにする。When the readings of the differential pressure gauges 22 and 23 increase to the specified value, the pre-cooling bypass valve 24 is opened, the J-T valve 8 is closed, and the helium liquefaction operation is switched to the hydrogen removal operation, and the helium is removed from the dewar bottle 9. Instead, it circulates through the bypass valve 24.

次に膨張タービン２５の流量を調節することによって、
流通するヘリウムの温度を上げ、熱交換器６．７に凍結
付着した水素等を液化し、液化された水素等を熱交換器
６，７より流下させて前記トラップ２０内に流れ込ませ
る。Next, by adjusting the flow rate of the expansion turbine 25,
The temperature of the circulating helium is raised to liquefy the hydrogen and the like frozen on the heat exchangers 6 and 7, and the liquefied hydrogen and the like flow down from the heat exchangers 6 and 7 and into the trap 20.

以上のようにして熱交換器６．７に凍結付着した水素等
を除去して、熱交換器６，７の出口と入口の差圧を規定
値以下とする。As described above, the hydrogen and the like that have frozen and adhered to the heat exchangers 6 and 7 are removed, and the differential pressure between the outlet and inlet of the heat exchangers 6 and 7 is made below a specified value.

以上熱交換器とトラップ２０との間に発生した凍結水素
等の除去について述べたが、次にトラップ２０とデユワ
瓶９の頂部に配したＪ−Ｔ弁８との間及びＪ−Ｔ弁８に
発生した凍結水素等の除去について述べると、トラップ
２０とＪ−Ｔ弁８の間及びＪ−Ｔ弁８に固着した水素等
を加熱するヒーター１２°を設ける。The removal of frozen hydrogen etc. generated between the heat exchanger and the trap 20 has been described above. Regarding the removal of frozen hydrogen and the like generated during the process, a heater 12° is provided between the trap 20 and the J-T valve 8 and for heating the hydrogen and the like stuck to the J-T valve 8.

前記ヒーター１２゛は従来設けられているデユワ瓶９の
液化ヘリウム液面制御用ヒーター１２と接続し、第１図
の如く兼用としたものとする。The heater 12' is connected to the conventionally provided heater 12 for controlling the level of liquefied helium in the dewar bottle 9, and serves as a dual-purpose heater 12 as shown in FIG.

トラップ２０出口からＪ−Ｔ弁８に至る流路に凍結、付
着した水素笠は、前記同様のヘリウムが予冷用バイパス
弁２４を通過する水素除去運転を行いながら、トラップ
２０とＪ−Ｔ弁８との間に設置したヒーター１２°で徐
々に加温して、融解し、トラップ２０に流下させて除去
する。Hydrogen caps that have frozen and adhered to the flow path from the outlet of the trap 20 to the J-T valve 8 can be removed by removing the hydrogen from the trap 20 and the J-T valve 8 while performing a hydrogen removal operation in which helium passes through the pre-cooling bypass valve 24. It is gradually heated by a heater installed at 12 degrees between the two, melts it, and then flows down into the trap 20 to be removed.

以上のようにして液化機ｌ内で同化してヘリウムの流通
を１（ＩＩ害する水素笠を除去した後、予冷用バイパス
弁２４を閉じＪ−Ｔ弁８を開いてヘリウム液化運転に切
替える。After assimilating the helium in the liquefier 1 as described above and removing the hydrogen cap that would impair the flow, the pre-cooling bypass valve 24 is closed and the J-T valve 8 is opened to switch to helium liquefaction operation.

トラップ２０に溜って固化している水素等は、水素等の
除去運転時に流入する液化水素及びヘリウムガスによっ
て融解されるが、更にトラップ２０の外周に配置した前
記ヒータ１２によって加温し融解することも出来る。The hydrogen, etc. that has accumulated and solidified in the trap 20 is melted by the liquefied hydrogen and helium gas that flow in during the hydrogen removal operation, and is further heated and melted by the heater 12 disposed around the outer periphery of the trap 20. You can also do it.

又、前記実施例とほぼ同一の構成に於て、トラップ２０
の液溜りに温度計２７を設け且つ排出弁２１は、トラッ
プ２０に設けた前記温度計２７が水素の融解塩度を示し
たら自動的に開いて水素を排出し、沸点温度に達したら
自動的に閉じて水素の排出を中止するように自動制御す
るようにする。In addition, in the almost same configuration as the above embodiment, the trap 20
A thermometer 27 is provided in the trap 20, and a discharge valve 21 is automatically opened to discharge hydrogen when the thermometer 27 provided in the trap 20 indicates the molten salinity of hydrogen, and is automatically opened when the boiling point temperature is reached. Automatically control the valve to close and stop discharging hydrogen.

なお、排出弁２１の開度はヘリウムガスが水素の排出に
随伴することが極力少なくなるように調節する。Note that the opening degree of the exhaust valve 21 is adjusted so that the helium gas accompanying the hydrogen exhaust is minimized.

以上のようにして、ヘリウム冷凍液化機ｌ工程中の固化
水素は融解され、トラップ２０中に捕集され、トラップ
２０よりヘリウムのロスのないようにして外部に放出さ
れる。As described above, the solidified hydrogen during the helium freezing and liquefaction process is melted, collected in the trap 20, and discharged from the trap 20 to the outside without loss of helium.

従ってヘリウム冷凍液化機ｌは長期間連続して運転する
ことが出来る。Therefore, the helium refrigeration and liquefaction machine 1 can be operated continuously for a long period of time.

なお、本発明のヘリウム冷凍液化機系内の水素等の除去
装置は、上述の実施例にのみ限定されるものではなく、
本発明の要旨を逸脱しない範囲内において種々変更を加
え得ることは勿論である。Note that the device for removing hydrogen, etc. in the helium refrigeration and liquefier system of the present invention is not limited to the above-mentioned embodiments.
Of course, various changes can be made without departing from the spirit of the invention.

［発明の効果］ 以上説明したように、本発明のヘリウム冷凍液化機系内
の水素等の除去装置によれば、下記の如き種々の優れた
効果を奏し得る。[Effects of the Invention] As explained above, the device for removing hydrogen, etc. in a helium refrigeration and liquefier system of the present invention can provide various excellent effects as described below.

■　水素等に対するトラップおよび排出弁を熱交換器と
Ｊ−Ｔ弁との間に設けるたけで、大部分の水素等を除去
出来、又ヘリウムの酸化運転を中断する際も中断の期間
か短かく、ヘリウムの温度の上昇も少なく、定常状態に
戻る時間が早く動力のロスも少なくてすむ。■ By simply installing a trap and discharge valve for hydrogen, etc. between the heat exchanger and the J-T valve, most of the hydrogen, etc. can be removed, and even when helium oxidation operation is interrupted, the interruption period can be shortened. , the temperature of the helium increases less, and the time to return to a steady state is faster and there is less loss of power.

■　複雑な操作や触媒反応槽か不要となる等、設備が簡
単で経済的である。■ The equipment is simple and economical, as there is no need for complicated operations or a catalytic reaction tank.

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

第１図は本発明のトラップを設けたヘリウム冷凍液化機
の工程図、第２図はトラップの断面図、第３図は従来の
ヘリウム冷凍液化機の工程図、第４図は２０’に低温吸
着器を設けた際の部分工程図、第５図は切換式２０’に
低温吸着器を設けた従来の部分工程図である。 ｌはヘリウム冷凍液化機、２．３．４．５．ｅ、７は熱
交換器、８はＪ−Ｔ弁（ジュール・トムソン弁）、９は
デユワ瓶、１２は液面制御ヒーター、１２′は水素等を
加熱するヒーター、２０はトラップ、２１は排出弁、２
７は温度計、２８は排出弁の制御装置を示す。Figure 1 is a process diagram of a helium freezing and liquefier equipped with the trap of the present invention, Figure 2 is a cross-sectional view of the trap, Figure 3 is a process diagram of a conventional helium freezing and liquefier, and Figure 4 is a low temperature of 20'. A partial process diagram when an adsorption device is provided. FIG. 5 is a partial process diagram of a conventional method in which a low-temperature adsorption device is provided in the switching type 20'. 1 is a helium freezing liquefaction machine, 2.3.4.5. e, 7 is a heat exchanger, 8 is a J-T valve (Joule-Thomson valve), 9 is a dewar bottle, 12 is a liquid level control heater, 12' is a heater that heats hydrogen etc., 20 is a trap, 21 is a discharge valve, 2
7 is a thermometer, and 28 is a control device for a discharge valve.

Claims (1)

【特許請求の範囲】 １）ヘリウム冷凍液化機系において、熱交換器とＪ−Ｔ
弁との間に水素等を捕集するトラップを設けると共に、
該トラップに排出弁を設けたことを特徴とするヘリウム
冷凍液化機系内の水素等の除去装置。 ２）Ｊ−Ｔ弁及び該Ｊ−Ｔ弁とトラップ間に固着した水
素等を加熱するヒーターを設けた請求項１記載のヘリウ
ム冷凍液化機系内の水素等の除去装置。 ３）トラップ内の液溜りに温度計を設け且つ該温度計よ
りの信号により排出弁の開閉を行う制御装置を設けた請
求項１又は２記載のヘリウム冷凍液化機系内の水素等の
除去装置。[Claims] 1) In a helium refrigeration liquefaction machine system, a heat exchanger and a J-T
In addition to installing a trap to collect hydrogen etc. between the valve and the
A device for removing hydrogen, etc. in a helium refrigeration and liquefaction machine system, characterized in that the trap is provided with a discharge valve. 2) The apparatus for removing hydrogen, etc. in a helium freezing and liquefier system according to claim 1, further comprising a J-T valve and a heater for heating hydrogen, etc. stuck between the J-T valve and the trap. 3) The device for removing hydrogen, etc. in a helium freezing and liquefier system according to claim 1 or 2, further comprising a thermometer provided in the liquid pool in the trap, and a control device for opening and closing the discharge valve based on a signal from the thermometer. .
JP21579489A 1989-08-22 1989-08-22 Device for removing hydrogen etc. in the helium freeze liquefaction system Expired - Fee Related JPH0686963B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21579489A JPH0686963B2 (en) 1989-08-22 1989-08-22 Device for removing hydrogen etc. in the helium freeze liquefaction system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21579489A JPH0686963B2 (en) 1989-08-22 1989-08-22 Device for removing hydrogen etc. in the helium freeze liquefaction system

Publications (2)

Publication Number Publication Date
JPH0379960A true JPH0379960A (en) 1991-04-04
JPH0686963B2 JPH0686963B2 (en) 1994-11-02

Family

ID=16678354

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21579489A Expired - Fee Related JPH0686963B2 (en) 1989-08-22 1989-08-22 Device for removing hydrogen etc. in the helium freeze liquefaction system

Country Status (1)

Country Link
JP (1) JPH0686963B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005113722A (en) * 2003-10-06 2005-04-28 Hitachi Industries Co Ltd High pressure gas compression system, oil collection device and oil collection method
JP2009028977A (en) * 2007-07-26 2009-02-12 Brother Ind Ltd Tape printing apparatus
JP2012189314A (en) * 2011-03-08 2012-10-04 Linde Ag Refrigeration equipment
WO2013190263A1 (en) * 2012-06-20 2013-12-27 Oxford Instruments Nanotechnology Tools Limited Reduction of blockages in a cryogenic refrigerator system such as for magnetic resonance imaging systems

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005113722A (en) * 2003-10-06 2005-04-28 Hitachi Industries Co Ltd High pressure gas compression system, oil collection device and oil collection method
JP2009028977A (en) * 2007-07-26 2009-02-12 Brother Ind Ltd Tape printing apparatus
JP2012189314A (en) * 2011-03-08 2012-10-04 Linde Ag Refrigeration equipment
WO2013190263A1 (en) * 2012-06-20 2013-12-27 Oxford Instruments Nanotechnology Tools Limited Reduction of blockages in a cryogenic refrigerator system such as for magnetic resonance imaging systems
CN104471328A (en) * 2012-06-20 2015-03-25 牛津仪器纳米技术工具有限公司 Reduction of blockages in a cryogenic refrigerator system such as for magnetic resonance imaging systems
US20150153427A1 (en) * 2012-06-20 2015-06-04 Oxford Instruments Nanotechnology Tools Limited Reduction of blockages in a cryogenic refrigeration system such as for magnetic resonance imaging systems
CN104471328B (en) * 2012-06-20 2017-09-08 牛津仪器纳米技术工具有限公司 Reduce and block in the cryogenic refrigerator system for example for magnetic resonance imaging system
US10942234B2 (en) * 2012-06-20 2021-03-09 Oxford Instruments Nanotechnology Tools Limited Reduction of blockages in a cryogenic refrigeration system such as for magnetic resonance imaging systems

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