JPH0686963B2 - Device for removing hydrogen etc. in the helium freeze liquefaction system - Google Patents
Device for removing hydrogen etc. in the helium freeze liquefaction systemInfo
- Publication number
- JPH0686963B2 JPH0686963B2 JP21579489A JP21579489A JPH0686963B2 JP H0686963 B2 JPH0686963 B2 JP H0686963B2 JP 21579489 A JP21579489 A JP 21579489A JP 21579489 A JP21579489 A JP 21579489A JP H0686963 B2 JPH0686963 B2 JP H0686963B2
- Authority
- JP
- Japan
- Prior art keywords
- helium
- hydrogen
- valve
- trap
- removing hydrogen
- 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 - Fee Related
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
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一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 field of application] The present invention is applicable to industrial helium refrigerators and general helium freeze liquefiers that are attached to superconducting power application equipment that requires long-term continuous operation. The present invention relates to a device for removing hydrogen and the like in the 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 applying 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 the boiling point of all substances is the lowest (about 4
° K) Helium is the best choice for producing cryogenic 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が付属しているものが多
い。Therefore, as a device necessary for maintaining the low temperature of the superconducting power application device, many devices are equipped with a helium freeze liquefaction machine.
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基の熱交換器2,3,4,5,6,7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ュワ瓶
９に溜めるようになっている。The helium refrigeration liquefier 1 generally has a step of circulating, for example, six heat exchangers 2, 3, 4, 5, 6, 7 as shown in FIG.
-Helium is ejected from the T valve (Jule-Thomson valve) 8 to liquefy the helium by the Joule-Thomson effect and accumulate in the Dewar bottle 9.
液化ヘリウムが所要量デュワ瓶９に溜ると、取出口10よ
り取出され本体に供給される。又デュワ瓶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と液面制御
ヒーター12が自動的に作動し始め、該ヒーター12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 is accumulated in the Dewar bottle 9, it is taken out from the outlet 10 and supplied to the main body. In addition, the dewar bottle 9 has a liquid level gauge.
11 is installed, and when the liquid height exceeds a required level, the liquid level control heater 12 automatically starts to operate, and the heating of the heater 12 stops the liquefaction of helium to keep the liquid level constant.
しかるに前記ヘリウム冷凍液化機１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 liquefier 1, as impurities in the helium supplied from the outside and leakage from the outside at the low pressure part in the system,
Moisture and air are mixed, and lubricating oil and its decomposition gas, such as carbon monoxide, carbon dioxide, and hydrogen, are mixed from the oil supply type compressor 13. It should be noted that hydrogen may be released from the metal forming the liquefying machine 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、固定の流路を閉塞し、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。Since all of the above impurities have higher liquefaction and solidification temperatures than helium, they are liquefied at a low temperature part in the process, further frozen and solidified, and the fixed flow passage is closed, and during long-term continuous operation,
The phenomenon of stopping the flow of helium gas occurs.
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、一酸化炭素、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15,16、触媒
により前記ガスを酸化する触媒反応槽18、乾燥器14等が
設置されている。In order to prevent the above phenomenon, a dryer 14 and low-temperature adsorbers 15 and 16 using cold such as liquid nitrogen are installed in the middle of the process for moisture and air, and oil, carbon monoxide, carbon dioxide For removing hydrocarbon gas and hydrogen, a high performance oil separation adsorber 17, a low temperature adsorber 15 and 16 using the liquid nitrogen, a catalytic reaction tank 18 for oxidizing the gas with a catalyst, a drier 14 and the like are installed. ing.
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゜K、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。斯かる際には一旦運転を
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゜K低温吸着器19に水素を吸
着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、第４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 ° K, hydrogen 20 ° K) below liquid nitrogen (boiling point 77 ° K) cannot be completely removed, and hydrogen is solidified and accumulated during long-term continuous operation, and the accumulated amount increases. It can no longer be ignored and begins to freeze and block in the deep-chilled part, which interferes with the circulation of helium. In such a case, the operation is temporarily stopped, the deep-chilled portion is heated, and the frozen and solidified hydrogen is gasified and removed through the catalytic reaction tank 18. As shown in FIG. An adsorber 19 at a lower temperature of 20 ° K is provided between the heat exchangers 6, and a method of adsorbing hydrogen in the 20 ° K low temperature adsorber 19 is used to remove hydrogen. In FIGS. 3 and 4, reference numeral 24 is a pre-cooling bypass valve, 25 is an expansion turbine, 26 is a Freon refrigerator, 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１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, at the time of oxidation in the catalytic reaction tank 18, the operation of the liquefier 1 must be temporarily stopped and the temperature rises considerably. It takes a long time to start, and more power for helium regeneration circulation is consumed.
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弁及びデュワ瓶）が必
要であり、設備増となるほか運転操作も複雑化する。To supply liquefied helium to the main body continuously,
A spare system for switching (heat exchanger, JT valve, and Dewar bottle) is required, which increases equipment and complicates operation.
又20゜K低温吸着器19を設置する際にも、連続して冷熱の
供給を必要とする際には、第５図に示す如く切換式予備
の20゜K低温吸着器19′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
における加熱再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 20 ° K low temperature adsorber 19 and when it is necessary to continuously supply cold heat, it is necessary to provide a switchable spare 20 ° K low temperature adsorber 19 'as shown in FIG. In addition to the increase in equipment, there is a decrease in reliability associated with switching regeneration, an increase in heat loss due to heating regeneration in the deep-chilled portion, clogging due to the adhesion of solidified low boiling point gas, and the like.
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、簡単な設備だけで、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ものであ
る。The present invention has been devised in view of such drawbacks of the prior art, only simple equipment, catalyst reaction tank and the like is not required, equipment costs are reduced, long-term continuous operation is possible, operation suspension period is short, helium It is an object of the present invention to provide a device for removing hydrogen and the like in a stable refrigeration liquefaction system that does not flow out.
［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、又更にト
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 relates to a helium refrigerating liquefaction system, including a heat exchanger and a J-
A trap for collecting hydrogen and the like is provided between the valve and the T valve, and a discharge valve is provided in the trap. Further, a heater is provided in the trap and a thermometer for controlling the opening and closing of the discharge valve. It is provided.
［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用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
間に凍結付着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。[Operation] The solidified hydrogen, etc. that has left the heat exchanger accompanying the helium gas flows into the trap on the way to be separated and removed, and the hydrogen etc. frozen and adhered to the heat exchanger is switched to the bypass circuit for pre-cooling and the circulating helium By increasing the temperature, it melts and flows into the trap to be separated and removed.The JT valve and hydrogen etc. frozen and adhered between the JT valve and the trap are heated by a heater to melt and flow into the trap to be separated and removed. It
［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。Embodiments 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。FIG. 1 and FIG. 2 show an embodiment of the present invention, and are shown in FIG.
In the figure, the parts denoted by the same reference numerals as in FIG. 5 represent the same things.
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 or the like is provided between the T valves 8, and a discharge valve 21 is provided in the trap 20.
最終段の２基の熱交換器6,7の出入口には、出口と入口
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 for measuring the differential pressure between the outlet and the inlet are installed at the inlet and outlet of the last two heat exchangers 6 and 7.
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で始まり、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 operation state, hydrogen and the like that have penetrated into helium are cooled, liquefaction starts in the heat exchanger 5 in the middle stage, and freeze adhesion occurs between the heat exchangers 6 and 7 and the JT 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20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 solid hydrogen and the like that accompany the helium gas fall into the trap 20 and are separated before reaching the JT valve 8, so that the JT valve 8 can be prevented from being blocked.
又熱交換器6,7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６、７の出口と入口の差圧が徐々に増大する。Further, hydrogen or the like frozen or attached to the heat exchangers 6 and 7 hinders the flow of helium gas as the amount of freezing and attachment increases, and the differential pressure between the outlets and inlets of the heat exchangers 6 and 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、ヘリウムがデュワ
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 have increased to the specified values, the pre-cooling bypass valve 24 is opened, the JT valve 8 is closed, and the operation is switched from liquefying helium to removing hydrogen and the like, and helium does not pass through the Dewar bottle 9. , To circulate 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 flowing helium is raised to liquefy the hydrogen and the like frozen and attached to the heat exchangers 6 and 7, and the liquefied hydrogen and the like to the heat exchangers 6 and 7.
It is made to flow down more and flow 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, hydrogen and the like frozen and attached to the heat exchangers 6 and 7 are removed, and the differential pressure between the outlet and the inlet of the heat exchangers 6 and 7 is set to a specified value or less.
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とデュワ瓶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 generated between the heat exchanger and the trap 20 has been described above. Next, the trap 20 and the Dewar 9
The removal of frozen hydrogen and the like generated between the JT valve 8 and the JT valve 8 placed on the top of the JT valve 8 will be described. A heater 12 'that heats the hydrogen and the like fixed between the trap 20 and the JT valve 8 and on the JT valve 8 will be described. To provide.
前記ヒーター12′は従来設けられているデュワ瓶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 conventional liquefied helium liquid level control heater 12 of the Dewar bottle 9 and is also used 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
た水素等は、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。For hydrogen and the like frozen and attached to the flow path from the trap 20 outlet to the JT valve 8, helium similar to the above is used for precooling bypass valve 24.
Trap 20 and J-
It is gradually heated by a heater 12 'installed between the T valve 8 and the T valve 8 to be melted, and is made to flow down into a trap 20 to be removed.
以上のようにして液化機１内で固化してヘリウムの流通
を阻害する水素等を除去した後、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 hydrogen and the like that solidify in the liquefier 1 and obstruct the flow of helium are removed as described above, the pre-cooling bypass valve 24 is closed and the JT valve 8 is opened to switch to the helium liquefying 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。Hydrogen and the like accumulated and trapped in the trap 20 are melted by liquefied hydrogen and helium gas flowing in during the operation of removing hydrogen and the like, and further heated and melted by the heater 12 arranged on the outer periphery of the trap 20. You can also
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が水素の融解温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。Further, in the almost same structure as the above-mentioned embodiment, a thermometer 27 is provided in the liquid pool of the trap 20 and the discharge valve 21 is automatically operated when the thermometer 27 provided in the trap 20 indicates the melting temperature of hydrogen. Open to open to discharge hydrogen, and when the boiling point temperature is reached, it is automatically closed to automatically stop the discharge of 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。The opening of the discharge valve 21 is adjusted so that the helium gas is not accompanied by the discharge of hydrogen as much as possible.
以上のようにして、ヘリウム冷凍液化機１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 in the process of the helium freeze liquefaction machine 1 is melted and collected in the trap 20,
It is released to the outside with less loss of helium.
従ってヘリウム冷凍液化機１は長期間連続して運転する
ことが出来る。Therefore, the helium refrigeration liquefier 1 can be continuously operated 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。Incidentally, the removal device for hydrogen and the like in the helium freeze liquefaction system of the present invention is not limited to the above-mentioned embodiment,
Needless to say, various changes can be made without departing from the scope of the present 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 described above, according to the device for removing hydrogen and the like in the helium refrigeration liquefier system of the present invention, various excellent effects as described below can be obtained.
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弁との間に設けるだけで、大部分の水素等を除去出
来、又ヘリウムの液化運転を中断する際も中断の期間が
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。The trap and discharge valve for hydrogen etc. are connected to the heat exchanger and J-
Most of hydrogen etc. can be removed just by installing it between the T valve and the helium liquefaction operation. Quick and less power loss.
複雑な操作や触媒反応槽が不要となる等、設備が簡単
で経済的である。The equipment is simple and economical because complicated operations and catalytic reaction tanks are unnecessary.
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゜K低温吸着器
を設けた際の部分工程図、第５図は切換式20゜K低温吸着
器を設けた従来の部分工程図である。 １はヘリウム冷凍液化機、2,3,4,5,6,7は熱交換器、８
はJ-T弁（ジュール・トムソン弁）、９はデュワ瓶、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、27は温度計、28は排出
弁の制御装置を示す。FIG. 1 is a process drawing of a helium refrigerating liquefier equipped with the trap of the present invention, FIG. 2 is a sectional view of a trap, FIG. 3 is a process drawing of a conventional helium refrigerating liquefier, and FIG. FIG. 5 is a partial process diagram when an adsorber is provided, and FIG. 5 is a conventional partial process diagram when a switchable 20 ° K low temperature adsorber is provided. 1 is a helium refrigeration liquefier, 2,3,4,5,6,7 are heat exchangers, 8
Is JT valve (Jule Thomson valve), 9 is Dewa bottle, 12
Is a liquid level control heater, 12 'is a heater for heating hydrogen, etc., 20 is a trap, 21 is a discharge valve, 27 is a thermometer, and 28 is a discharge valve control device.
Claims (3)
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。1. A helium refrigeration liquefier system characterized in that a trap for collecting hydrogen and the like is provided between a heat exchanger and a JT valve in the helium freeze liquefaction system, and a discharge valve is provided in the trap. Equipment for removing hydrogen, etc. in the system.
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。2. A device for removing hydrogen and the like in a helium refrigeration liquefaction system according to claim 1, further comprising a JT valve and a heater for heating hydrogen and the like fixed between the JT valve and the trap.
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。3. The hydrogen in the helium refrigerating liquefier system according to claim 1 or 2, wherein a thermometer is provided in the liquid pool in the trap and a control device for opening and closing the discharge valve is provided by a signal from the thermometer. Removal device.
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 JPH0379960A (en) | 1991-04-04 |
| JPH0686963B2 true 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2888539B1 (en) | 2012-06-20 | 2022-01-12 | Wuhan Zhongke Niujin Magnetic Resonance Technology Co., Ltd | Reduction of blockages in a cryogenic refrigerator system such as for magnetic resonance imaging systems |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4179955B2 (en) * | 2003-10-06 | 2008-11-12 | 株式会社日立プラントテクノロジー | High pressure gas compression system and oil collector |
| JP4930247B2 (en) * | 2007-07-26 | 2012-05-16 | ブラザー工業株式会社 | Tape printer |
| DE102011013345A1 (en) * | 2011-03-08 | 2012-09-13 | Linde Aktiengesellschaft | refrigeration plant |
-
1989
- 1989-08-22 JP JP21579489A patent/JPH0686963B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2888539B1 (en) | 2012-06-20 | 2022-01-12 | Wuhan Zhongke Niujin Magnetic Resonance Technology Co., Ltd | Reduction of blockages in a cryogenic refrigerator system such as for magnetic resonance imaging systems |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0379960A (en) | 1991-04-04 |
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