JPS6073262A - helium liquefaction refrigerator - Google Patents
helium liquefaction refrigeratorInfo
- Publication number
- JPS6073262A JPS6073262A JP18031583A JP18031583A JPS6073262A JP S6073262 A JPS6073262 A JP S6073262A JP 18031583 A JP18031583 A JP 18031583A JP 18031583 A JP18031583 A JP 18031583A JP S6073262 A JPS6073262 A JP S6073262A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- heat exchanger
- low
- helium
- cooled
- 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
Links
Landscapes
- Separation By Low-Temperature Treatments (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 〔発明の利用分野〕 木発明は、ヘリウム液化冷凍機ｊこ関するものである。[Detailed description of the invention] [Field of application of the invention] The invention relates to a helium liquefaction refrigerator.
従来のヘリウム液化冷凍機のコールドボックス内フロー
は、膨張機出口のラインを第４熱交換器の低圧ライン冷
端側、即ち、第４熱交換器と第５熱交換器の間に接続し
ていただけである。この場合、起動時の第５熱交換器は
′、８０Ｋを過ぎると、中圧ラインを通ったガスの戻り
ガスで冷すだけで、同一ガスの熱交換器となるのみで、
戻りガスの量を減らしたりして予冷を行なっているが、
一般に予冷が円滑に進まない表いう欠点があった。The flow inside the cold box of a conventional helium liquefaction refrigerator is achieved by connecting the expander outlet line to the cold end of the low pressure line of the fourth heat exchanger, that is, between the fourth heat exchanger and the fifth heat exchanger. It was just that. In this case, the fifth heat exchanger at startup will only be cooled by the return gas of the gas that has passed through the medium pressure line after 80K, and will become a heat exchanger for the same gas.
Precooling is performed by reducing the amount of return gas, but
Generally, there was a drawback that precooling did not proceed smoothly.
木発明の目的は、膨ＩＮ機出口の冷たいガスを直接第５
熱交換器に送って予冷時の冷却を促進することにある。The purpose of the wood invention was to directly transfer the cold gas from the outlet of the expansion
The purpose is to send it to a heat exchanger to promote cooling during pre-cooling.
コールドボックスの予冷は、８０ Ｋ近くまでは主に液
体窒素の補助寒剤で冷却が進められるが、それ以降、液
化までは膨張機が主体となる。そのため、木発明は、膨
張機出口の冷たいガスを第５熱交換器に導入して、第５
熱交換器から冷やせるように、冷却ラインを設けたもの
である。Pre-cooling of the cold box is mainly done using liquid nitrogen as an auxiliary refrigerant up to about 80 K, but after that, the expansion machine is used as the main cooling agent until liquefaction. Therefore, the wooden invention introduces the cold gas at the outlet of the expander into the fifth heat exchanger.
A cooling line is installed to allow cooling from the heat exchanger.
以下、本発明の一実施例を図面により説明する。 An embodiment of the present invention will be described below with reference to the drawings.
系内のガスは、供給う・イン２９より循環圧縮様１に送
られ、低圧ライン１２よりｗ３環してきたガスとともに
循環圧縮機１で所定圧力まで昇圧されて、中圧ライン２
よりコールドボックス２７に送られる。The gas in the system is sent to the circulation compressor 1 from the supply inlet 29, and is boosted to a predetermined pressure by the circulation compressor 1 together with the gas that has circulated through the low pressure line 12 to the intermediate pressure line 2.
It is then sent to the cold box 27.
第１？Ａ交換器１８でＬＮ２ラインおより供給された液
体窒素で予冷され、一部のガスは第１予冷ライン１３に
分岐され、第】予冷弁１５を経て気液分離器Ｚ３に送ら
れる。残りのガスは、第１熱交換器１８の出口てタービ
ンライン３にも分岐され、ｌｃのガスはタービン入口４
ｒ４を経て第１膨り１）タービン５、第２膨張タービン
６で膨張されて冷たいガスとなる。First? The A exchanger 18 precools the gas with liquid nitrogen supplied from the LN2 line, and part of the gas is branched to the first precooling line 13 and sent to the gas-liquid separator Z3 via the first precooling valve 15. The remaining gas is also branched off to the turbine line 3 at the outlet of the first heat exchanger 18, and the lc gas is branched to the turbine inlet 4.
After passing through r4, the first expansion 1) is expanded by the turbine 5 and the second expansion turbine 6, and becomes cold gas.
第２膨張タービン６を出たガスは分岐され一タービン出
目弁７を経てタービン出口ライン８を通り、第４熱交換
器２１の冷端側に入る。一方、第２膨張タービン６の出
口で分岐した残りのガスは、第２予冷ライン９を通１］
箪２予冷弁１０を経て第５熱交換ｌｔＩ！２２の冷端側
に入る。第１熱交換器１８出口で分岐された残りの中圧
ライン２のガスは、 ｆｆｉ’２熱交換器１９ 、 、
ｆｆｉ ３熱交換器２０ 、第４熱交換器２１．第５熱
交換器２２で低圧ライン１２を流れる低温の戻りガスに
よって冷却され−ＪＴ弁】６で液化されて気液分離ｎ２
３でガスとｉ）こ分離され、液は液−み出し弁２４によ
ｊｌ ）ランスフ７−チコーブ２５を経て、液体ヘリウ
ムデユワ−２６に貯液される。一方、ガスは、顕然回収
のため、低圧ライン１２よ蚤）第５熱交換器２２．第４
熱交換ａ２１．第３熱交換器２０．第２熱交換器１９．
第１熱文換器１８を通って循環圧縮機１へ戻る。なお、
起動にはバイパスライン１４およびバイパス弁１７を通
して、予冷を促進させている。The gas exiting the second expansion turbine 6 is branched, passes through the first turbine outlet valve 7, passes through the turbine outlet line 8, and enters the cold end side of the fourth heat exchanger 21. On the other hand, the remaining gas branched at the outlet of the second expansion turbine 6 is passed through the second precooling line 9 to
5th heat exchange ltI through the 2nd pre-cooling valve 10! Enter the cold end side of 22. The remaining gas in the medium pressure line 2 branched off at the outlet of the first heat exchanger 18 is transferred to the ffi'2 heat exchanger 19, ,
ffi 3 heat exchanger 20, fourth heat exchanger 21. It is cooled by the low-temperature return gas flowing through the low pressure line 12 in the fifth heat exchanger 22 and is liquefied in the JT valve]6 for gas-liquid separation n2.
At step 3, the gas and i) are separated, and the liquid is stored in a liquid helium dewar 26 via a liquid discharge valve 24 and a lance pipe 7-chicove 25. On the other hand, the gas is transferred to the low-pressure line 12 and the fifth heat exchanger 22. Fourth
Heat exchange a21. Third heat exchanger 20. Second heat exchanger 19.
It passes through the first thermal exchanger 18 and returns to the circulating compressor 1. In addition,
At startup, the bypass line 14 and bypass valve 17 are passed through to promote precooling.
しかして、予冷が完了すると、第２予冷弁１０を閉じて
定常運転に移行する。When the precooling is completed, the second precooling valve 10 is closed and steady operation is started.
未実施例によれば、コールドボックス２７の予冷時に第
２予冷ライン９から冷たいガスを第５熱交換器２２１こ
直接送り込むので、冷却促進の効果がある。According to the unimplemented example, cold gas is sent directly to the fifth heat exchanger 221 from the second precooling line 9 during precooling of the cold box 27, which has the effect of promoting cooling.
以上述べたように、本発明によれば、第２タービン出口
の冷たいガスを任意に第５熱交換ＷＲの冷端側に送り込
むことができるので、第５か交換器の冷却を円滑に促進
することができる効果がある。As described above, according to the present invention, the cold gas at the outlet of the second turbine can be arbitrarily sent to the cold end side of the fifth heat exchanger WR, thereby smoothly promoting cooling of the fifth heat exchanger. There is an effect that can be done.
したがって、起動時は、まず第１予冷ラインを使って８
’ＯＫ近くまで第５熱ヌ換器の冷端側から冷却して行き
、その後は、膨張タービンの寒冷ガスにより第５熱交換
器から順次第１熱交換器まで冷やすこと１こなるので、
ムラ冷えがな（なＩ）、全体を一様に冷やすことが可能
となり、予冷を円滑にして起動時間を短縮することがで
きる。Therefore, at startup, first use the first precooling line to
Cooling is performed from the cold end of the 5th heat exchanger until it is close to OK, and then the cold gas from the expansion turbine is used to cool the 5th heat exchanger and then the 1st heat exchanger.
It is possible to cool the entire unit evenly without uneven cooling, and the pre-cooling can be smoothed to shorten the startup time.
図面は本発明によるヘリウム液化冷凍機の一実施例を示
す系統図である。The drawing is a system diagram showing an embodiment of a helium liquefaction refrigerator according to the present invention.
Claims (1)
低圧戻りガスにより冷却した後分岐し、その一方を膨張
機で膨張冷却して低圧戻りカス裔 に合流させ、複数個の熱交換器な通して温度回復後循環
圧縮機に戻すと共に、分岐した他方のヘリウムガスを複
数個の；悼交換器を通して（氏圧戻すガスにより冷却し
た後ＪＴ弁を通して液化させ、気液分離したヘリウドガ
スを低圧戻りガスに合流させるようにしたヘリウム液化
冷凍群において、前記膨張機で膨張冷却した低圧ヘリウ
ムガスを第２）冷弁を介して・＼リウムガスを冷却する
最終熱交換器の低温側で低圧戻りガスに合流させる第２
予冷ラインを設けたことを特徴とするヘリウム液化冷凍
機。[Scope of Claims] 1 Helium gas pressurized by a circulation compressor is cooled by low-pressure return gas in a heat exchanger and then branched, one of which is expanded and cooled by an expander and merged with low-pressure return scum. After recovering the temperature through several heat exchangers, it is returned to the circulation compressor, and the other branched helium gas is passed through multiple In the helium liquefaction refrigeration group in which the separated helium gas is combined with the low-pressure return gas, the low-pressure helium gas expanded and cooled by the expander is passed through the second) cold valve to the low temperature of the final heat exchanger that cools the helium gas. The second side joins the low pressure return gas.
A helium liquefaction refrigerator featuring a pre-cooling line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18031583A JPS6073262A (en) | 1983-09-30 | 1983-09-30 | helium liquefaction refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18031583A JPS6073262A (en) | 1983-09-30 | 1983-09-30 | helium liquefaction refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6073262A true JPS6073262A (en) | 1985-04-25 |
Family
ID=16081058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18031583A Pending JPS6073262A (en) | 1983-09-30 | 1983-09-30 | helium liquefaction refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6073262A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6317360A (en) * | 1986-07-09 | 1988-01-25 | 株式会社日立製作所 | Cryogenic refrigerating method |
-
1983
- 1983-09-30 JP JP18031583A patent/JPS6073262A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6317360A (en) * | 1986-07-09 | 1988-01-25 | 株式会社日立製作所 | Cryogenic refrigerating method |
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