JPH08277798A - Shaft seal device for ammonia handling equipment provided with rotary shaft - Google Patents
Shaft seal device for ammonia handling equipment provided with rotary shaftInfo
- Publication number
- JPH08277798A JPH08277798A JP12987295A JP12987295A JPH08277798A JP H08277798 A JPH08277798 A JP H08277798A JP 12987295 A JP12987295 A JP 12987295A JP 12987295 A JP12987295 A JP 12987295A JP H08277798 A JPH08277798 A JP H08277798A
- Authority
- JP
- Japan
- Prior art keywords
- seal
- mechanical seal
- shaft
- ammonia
- ammonia gas
- 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
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 description 31
- 239000007789 gas Substances 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000010724 circulating oil Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Mechanical Sealing (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は回転軸を有するアンモ
ニア取扱い機器の軸封装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft sealing device for ammonia handling equipment having a rotating shaft.
【０００２】[0002]
【従来の技術】フロンガスの環境破壊が問題になって以
来、フロンガスに変わる種々の冷媒が提案されている
が、近年アンモニアガスが再度見直されてきており、冷
凍庫等の冷媒として使用する提案が実現しつつある。2. Description of the Related Art Various refrigerants have been proposed to replace CFCs since the environmental destruction of CFCs has become a problem, but ammonia gas has been reviewed again in recent years, and a proposal to use it as a refrigerant for freezer etc. has been realized. I am doing it.
【０００３】[0003]
【発明が解決しようとする課題】しかし、アンモニアガ
スはフロンガスのように無毒ではなく、毒性を有するガ
スであるため、その漏洩防止措置は厳格に行われなくて
はならない。特に冷凍庫等の装置にあっては、圧縮機等
の回転軸においてガスが漏洩し易く、このような回転軸
におけるアンモニアガスをシールする軸封装置の開発が
望まれている。本発明はこのような要望に応えることを
目的とする。However, ammonia gas is not a non-toxic gas such as CFC gas but a toxic gas, and therefore leakage prevention measures must be taken strictly. Particularly in a device such as a freezer, gas easily leaks on a rotary shaft of a compressor or the like, and development of a shaft sealing device for sealing ammonia gas on such a rotary shaft is desired. The present invention aims to meet such a demand.
【０００４】[0004]
【課題を解決するための手段及び作用】上記目的を達成
するために本発明の回転軸を有するアンモニア取扱い機
器の軸封装置は、アンモニア取扱い機器の機内側の回転
軸上に装着された第１メカニカルシールと、該第１メカ
ニカルシールと機内側との間に形成され、密封用液が供
給される第１のシール室と、前記第１メカニカルシール
より大気側に装着された第２メカニカルシールと、 該
第２メカニカルシールと前記第１メカニカルシールとの
間に形成され、前記第１のシール室よりも低圧で密封用
液が循環供給される第２のシール室と、該第２のシール
室に連通して、密封用液からアンモニアガスを分離する
分離器と、を備えたことを特徴とする。機内側のアンモ
ニアガスは第１のシール室内の密封用液に溶けていて、
該アンモニアガスを含んだ密封用液は第１メカニカルシ
ールで１次的にシールされる。この第１メカニカルシー
ルから漏洩した少量の密封用液は低圧の第２シール室で
減圧されて、アンモニアガスが気泡として遊離する。そ
して該第２シール室に連通する分離器で密封用液から該
アンモニアガスを分離する。第２シール室の密封用液は
第２メカニカルシールで２次的にシールされる。また、
分離されたアンモニアガスは処理液に導入して吸収させ
る等の処理を行うことが望ましい。以上の構成より、ア
ンモニアガスの大気への漏洩を効果的に防止することが
可能になる。更に第２メカニカルシールの回転環に切欠
やスクリュウ或いは羽等を設けて回転ポンプ機能を備え
るようにして、このポンプ機能により密封用液を循環す
ることが望ましい。In order to achieve the above-mentioned object, a shaft sealing device for an ammonia handling equipment having a rotary shaft according to the present invention is a first shaft mounted on the rotary shaft inside the ammonia handling equipment. A mechanical seal, a first seal chamber formed between the first mechanical seal and the inside of the machine, to which a sealing liquid is supplied, and a second mechanical seal mounted on the atmosphere side of the first mechanical seal. A second seal chamber, which is formed between the second mechanical seal and the first mechanical seal and in which a sealing liquid is circulated and supplied at a pressure lower than that of the first seal chamber; and the second seal chamber. And a separator which communicates with the separator and separates the ammonia gas from the sealing liquid. The ammonia gas inside the machine is dissolved in the sealing liquid in the first seal chamber,
The sealing liquid containing the ammonia gas is primarily sealed by the first mechanical seal. A small amount of the sealing liquid leaking from the first mechanical seal is decompressed in the low pressure second seal chamber, and the ammonia gas is released as bubbles. Then, the ammonia gas is separated from the sealing liquid by a separator communicating with the second seal chamber. The sealing liquid in the second seal chamber is secondarily sealed by the second mechanical seal. Also,
It is desirable that the separated ammonia gas be introduced into the treatment liquid to be absorbed therein. With the above configuration, it is possible to effectively prevent the leakage of ammonia gas into the atmosphere. Further, it is desirable that the rotary ring of the second mechanical seal is provided with a notch, a screw, a blade, or the like so as to have a rotary pump function, and the sealing liquid is circulated by this pump function.
【０００５】[0005]
【実施例】以下本発明の実施例を図面に基づいて説明す
る。図１は本発明をアンモニア冷凍器の圧縮機の回転軸
シールに適用した実施例を示す半断面図である。機内Ｘ
から回転軸Ｚが延出し、圧縮機本体のケーシングＣの大
気Ｙ側にこの軸封装置のユニットが取り付けられてい
る。このユニットは第１メカニカルシール１０と第２メ
カニカルシール１１を備えた所謂タンデムメカニカルシ
ールの構造になっている。機内Ｘ側にはオイルシール３
が回転軸Ｚ上に設けられており、該オイルシール３の大
気側Ｙに第１メカニカルシール１０が装着されている。
このオイルシール３と第１メカニカルシール１０が形成
するシール面Ｓとの間が第１シール室１となっており、
オイル供給孔５から高圧のオイルが供給され、その圧力
Ｐ１は機内Ｘ側より高圧に保たれている。オイル供給孔
５から注入されたオイルは第１メカニカルシール１０の
摺動発熱を除去して、連通孔４を通って機内Ｘ側に入
り、循環機構（図示せず）により再びオイル供給孔５に
循環されるようになっている。このオイル供給孔５から
循環するオイルには、機内Ｘ側のアンモニアガスが溶け
ている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a half sectional view showing an embodiment in which the present invention is applied to a rotary shaft seal of a compressor of an ammonia refrigerator. In-flight X
A rotary shaft Z extends from the shaft, and the unit of the shaft sealing device is attached to the atmosphere Y side of the casing C of the compressor body. This unit has a so-called tandem mechanical seal structure including a first mechanical seal 10 and a second mechanical seal 11. Oil seal 3 on the X side of the machine
Is provided on the rotation axis Z, and the first mechanical seal 10 is mounted on the atmosphere side Y of the oil seal 3.
The first seal chamber 1 is defined between the oil seal 3 and the seal surface S formed by the first mechanical seal 10.
High-pressure oil is supplied from the oil supply hole 5, and the pressure P1 is kept higher than the in-machine X side. The oil injected from the oil supply hole 5 removes the sliding heat generation of the first mechanical seal 10, enters the in-machine X side through the communication hole 4, and enters the oil supply hole 5 again by the circulation mechanism (not shown). It is designed to be circulated. Ammonia gas on the in-machine X side is dissolved in the oil circulated from the oil supply hole 5.
【０００６】第１メカニカルシール１０は回転環２０と
固定環２１とから構成され、回転環２０と固定環２１が
回転摺動接触してシール面Ｓを形成し、このシール面Ｓ
により第１シール室１のオイルのシールを行うようにな
っている。The first mechanical seal 10 is composed of a rotary ring 20 and a fixed ring 21, and the rotary ring 20 and the fixed ring 21 are in sliding contact with each other to form a seal surface S.
Thus, the oil in the first seal chamber 1 is sealed.
【０００７】第１メカニカルシール１０の更に大気側Ｙ
には第２メカニカルシール１１が設けられており、第１
メカニカルシール１０のシール面Ｓと第２メカニカルシ
ール１１のシール面Ｓとの間が第２シール室２となって
いる。第２メカニカルシール１１は同様に回転環２２と
固定環２３から構成され、回転環２２と固定環２３によ
り構成される前記シール面Ｓによりシールするようにな
っている。この第２シール室２にはオイル循環孔６、７
が連通しており、オイルが第２シール室２に循環するよ
うになっている。回転環２２のストッパ環２４の外周に
は切欠８が形成され、この切欠８によるポンプ作用によ
り密封用液を循環させるようになっている。またオイル
循環孔６の入り口の脇にはポンプ作用を促進するために
邪魔板９が設けられている。この第２シール室２の圧力
Ｐ２は圧力Ｐ１よりも低圧に保たれるようになってい
る。Further to the atmosphere side Y of the first mechanical seal 10.
The second mechanical seal 11 is provided in the first
The second seal chamber 2 is between the seal surface S of the mechanical seal 10 and the seal surface S of the second mechanical seal 11. The second mechanical seal 11 is similarly composed of a rotary ring 22 and a fixed ring 23, and is sealed by the sealing surface S composed of the rotary ring 22 and the fixed ring 23. Oil circulation holes 6 and 7 are provided in the second seal chamber 2.
Are communicated with each other, and the oil circulates in the second seal chamber 2. A notch 8 is formed on the outer periphery of the stopper ring 24 of the rotary ring 22, and the sealing liquid is circulated by the pump action of the notch 8. Further, a baffle plate 9 is provided beside the inlet of the oil circulation hole 6 to promote the pump action. The pressure P2 of the second seal chamber 2 is kept lower than the pressure P1.
【０００８】オイル循環孔６とオイル循環孔７の循環路
の間には分離装置３０が設けられ、密封用液中のアンモ
ニアガスを分離するようになっている。即ち第１メカニ
カルシール１０からオイルが第２シール室２側に漏れる
と、該オイル中のアンモニアガスは気泡となって遊離
し、また一部のアンモニアガスはオイル中に残存する。
この気泡となったアンモニアガスとアンモニアガスが残
存するオイルが第２シール室２のオイルに混じって循環
し、分離装置３０においてアンモニアガスがほぼ完全に
分離されるようになっている。分離装置３０で分離され
たアンモニアガスはガス処理装置３１に送り、ここで水
や酸性水溶液に吸収させ、又は沈澱させ処理して、毒性
を除去するように構成されている。なお、このガス処理
装置３１の処理液としては、塩酸、硫酸、リン酸、酢
酸、酒石酸の水溶液を用いることが可能である。A separator 30 is provided between the oil circulation hole 6 and the oil circulation hole 7 to separate the ammonia gas in the sealing liquid. That is, when the oil leaks from the first mechanical seal 10 to the second seal chamber 2 side, the ammonia gas in the oil is released as bubbles, and a part of the ammonia gas remains in the oil.
The ammonia gas that has become the bubbles and the oil in which the ammonia gas remains are mixed with the oil in the second seal chamber 2 and circulate, and the ammonia gas is almost completely separated in the separator 30. The ammonia gas separated by the separation device 30 is sent to the gas treatment device 31, where it is absorbed in water or an acidic aqueous solution or treated to be precipitated to remove toxicity. As the treatment liquid of the gas treatment device 31, an aqueous solution of hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, tartaric acid can be used.
【０００９】以上の構成において、機内Ｘのアンモニア
ガスは第１シール室１の高圧のオイルによりシールさ
れ、該オイルは第１メカニカルシール１０によりシール
される。第１メカニカルシール１０から漏洩する若干の
オイルはアンモニアガスを含んでいるが、第１シール室
１よりも低圧の第２シール室２に漏洩すると減圧されて
アンモニアガスの一部は気泡となる。この気泡となりま
たオイルに残存するアンモニアガスは第２シール室２の
循環するオイルと共に循環して分離装置３０において、
分離され、ガス処理装置３１により処理される。第２メ
カニカルシール１１においてもオイルの若干の漏れはあ
るが、循環中に分離装置３０においてアンモニアガスは
分離されているため、オイル中に溶けているアンモニア
ガスの量は極めて微小であり、しかも圧力Ｐ２が低いた
め漏れ量はわずかであるから大気側Ｙを汚染することは
ない。In the above construction, the ammonia gas in the in-machine X is sealed by the high pressure oil in the first seal chamber 1, and the oil is sealed by the first mechanical seal 10. Although some oil leaking from the first mechanical seal 10 contains ammonia gas, when it leaks to the second seal chamber 2 having a lower pressure than the first seal chamber 1, the pressure is reduced and a part of the ammonia gas becomes bubbles. The ammonia gas that becomes the bubbles and remains in the oil circulates together with the circulating oil in the second seal chamber 2, and in the separator 30,
It is separated and processed by the gas processing device 31. The second mechanical seal 11 also has some oil leakage, but since the ammonia gas is separated in the separator 30 during circulation, the amount of ammonia gas dissolved in the oil is extremely small and the pressure is small. Since P2 is low, the amount of leakage is small, so the atmosphere Y is not contaminated.
【００１０】[0010]
【発明の効果】以上説明したように本発明の回転軸を有
するアンモニア取扱い機器の軸封装置によれば、効果的
に有毒のアンモニアガスのシールを行うことが可能にな
る。そのため、フロンの代替冷媒としてアンモニアガス
を利用でき、環境保全に貢献することができる。As described above, according to the shaft sealing device for the ammonia handling equipment having the rotating shaft of the present invention, it is possible to effectively seal the toxic ammonia gas. Therefore, ammonia gas can be used as a refrigerant alternative to CFCs, which can contribute to environmental protection.
【図１】本発明の一実施例を示す概略図。FIG. 1 is a schematic diagram showing an embodiment of the present invention.
１：第１シール室、２：第２シール室、３：オイルシー
ル、４：連通孔、５：オイル供給孔、６：オイル循環
孔、７：オイル循環孔、８：切欠、９：邪魔板、１０：
第１メカニカルシール、１１：第２メカニカルシール、
２０：回転環、２１：固定環、２２：回転環、２３：固
定環、２４：ストッパ環、３０：分離装置、３１：ガス
処理装置。1: First seal chamber, 2: Second seal chamber, 3: Oil seal, 4: Communication hole, 5: Oil supply hole, 6: Oil circulation hole, 7: Oil circulation hole, 8: Notch, 9: Baffle plate 10:
1st mechanical seal, 11: 2nd mechanical seal,
20: rotary ring, 21: fixed ring, 22: rotary ring, 23: fixed ring, 24: stopper ring, 30: separation device, 31: gas treatment device.
Claims (3)
上に装着された第１メカニカルシールと、 該第１メカニカルシールと機内側との間に形成され、密
封用液が供給される第１のシール室と、 前記第１メカニカルシールより大気側に装着された第２
メカニカルシールと、 該第２メカニカルシールと前記第１メカニカルシールと
の間に形成され、前記第１のシール室よりも低圧で密封
用液が循環供給される第２のシール室と、 該第２のシール室に連通して、密封用液からアンモニア
ガスを分離する分離器と、 を備えたことを特徴とする回転軸を有するアンモニア取
扱い機器の軸封装置。1. A first mechanical seal mounted on a rotating shaft inside a machine of an ammonia handling device, and a first mechanical seal formed between the first mechanical seal and the inside of the machine and supplied with a sealing liquid. A seal chamber and a second chamber mounted on the atmosphere side of the first mechanical seal.
A mechanical seal; a second seal chamber which is formed between the second mechanical seal and the first mechanical seal and which circulates and supplies a sealing liquid at a pressure lower than that of the first seal chamber; A shaft sealing device for an ammonia handling device having a rotating shaft, comprising: a separator that communicates with the sealing chamber of 1 above and separates ammonia gas from a sealing liquid.
ガスを処理液に導入して処理する処理装置を更に設け
た、 請求項１に記載の回転軸を有するアンモニア取扱い機器
の軸封装置。2. The shaft sealing device for an ammonia handling device having a rotating shaft according to claim 1, further comprising a processing device for introducing the ammonia gas separated in the separator into a processing liquid for processing.
転ポンプ機能を備え、該ポンプ機能により密封用液を循
環する、 請求項１又は２に記載の回転軸を有するアンモニア取扱
い機器の軸封装置。3. A shaft sealing device for an ammonia handling device having a rotary shaft according to claim 1, wherein the rotary ring of the second mechanical seal has a rotary pump function, and the sealing liquid is circulated by the pump function. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12987295A JPH08277798A (en) | 1995-04-04 | 1995-04-04 | Shaft seal device for ammonia handling equipment provided with rotary shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12987295A JPH08277798A (en) | 1995-04-04 | 1995-04-04 | Shaft seal device for ammonia handling equipment provided with rotary shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08277798A true JPH08277798A (en) | 1996-10-22 |
Family
ID=15020397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12987295A Pending JPH08277798A (en) | 1995-04-04 | 1995-04-04 | Shaft seal device for ammonia handling equipment provided with rotary shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08277798A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11294597A (en) * | 1998-04-10 | 1999-10-29 | Eagle Ind Co Ltd | Shaft seal structure of refrigerator compressor |
| JPH11344126A (en) * | 1998-05-29 | 1999-12-14 | Eagle Ind Co Ltd | Shaft seat device for compressor in refrigerator |
| JP2003004147A (en) * | 2001-06-21 | 2003-01-08 | Eagle Ind Co Ltd | Multistage shaft seal device |
| JP2003185030A (en) * | 2001-12-21 | 2003-07-03 | Nippon Pillar Packing Co Ltd | Shaft seal device |
| JP2003225579A (en) * | 2002-02-06 | 2003-08-12 | Turbo Kogyo Co Ltd | Bead mill |
| JP2008075612A (en) * | 2006-09-25 | 2008-04-03 | Tanken Seal Seiko Co Ltd | Sealing device for large vertical shaft pump |
| CN105065276A (en) * | 2015-07-22 | 2015-11-18 | 宋东方 | Combined type sealing device of dry screw vacuum pump |
| JP2018112106A (en) * | 2017-01-10 | 2018-07-19 | 三菱重工業株式会社 | Liquid pressure boosting device and urea synthesizing plant |
| JP2018112104A (en) * | 2017-01-10 | 2018-07-19 | 三菱重工業株式会社 | Vertical type pump and urea synthesis plant |
| WO2018131275A1 (en) * | 2017-01-10 | 2018-07-19 | 三菱重工業株式会社 | Vertical pump and urea synthesizing plant |
-
1995
- 1995-04-04 JP JP12987295A patent/JPH08277798A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11294597A (en) * | 1998-04-10 | 1999-10-29 | Eagle Ind Co Ltd | Shaft seal structure of refrigerator compressor |
| JPH11344126A (en) * | 1998-05-29 | 1999-12-14 | Eagle Ind Co Ltd | Shaft seat device for compressor in refrigerator |
| JP2003004147A (en) * | 2001-06-21 | 2003-01-08 | Eagle Ind Co Ltd | Multistage shaft seal device |
| JP2003185030A (en) * | 2001-12-21 | 2003-07-03 | Nippon Pillar Packing Co Ltd | Shaft seal device |
| JP2003225579A (en) * | 2002-02-06 | 2003-08-12 | Turbo Kogyo Co Ltd | Bead mill |
| JP2008075612A (en) * | 2006-09-25 | 2008-04-03 | Tanken Seal Seiko Co Ltd | Sealing device for large vertical shaft pump |
| CN105065276A (en) * | 2015-07-22 | 2015-11-18 | 宋东方 | Combined type sealing device of dry screw vacuum pump |
| JP2018112106A (en) * | 2017-01-10 | 2018-07-19 | 三菱重工業株式会社 | Liquid pressure boosting device and urea synthesizing plant |
| JP2018112104A (en) * | 2017-01-10 | 2018-07-19 | 三菱重工業株式会社 | Vertical type pump and urea synthesis plant |
| WO2018131275A1 (en) * | 2017-01-10 | 2018-07-19 | 三菱重工業株式会社 | Vertical pump and urea synthesizing plant |
| WO2018131268A1 (en) * | 2017-01-10 | 2018-07-19 | 三菱重工業株式会社 | Liquid pressure boosting device and urea synthesis plant |
| CN109563838A (en) * | 2017-01-10 | 2019-04-02 | 三菱重工业株式会社 | Vertical pump and urea synthesizing complete set of equipments |
| CN109563837A (en) * | 2017-01-10 | 2019-04-02 | 三菱重工业株式会社 | Liquid pressure rise device and urea synthesizing complete set of equipments |
| EP3486492A4 (en) * | 2017-01-10 | 2019-07-10 | Mitsubishi Heavy Industries, Ltd. | Liquid pressure boosting device and urea synthesis plant |
| US10704559B2 (en) | 2017-01-10 | 2020-07-07 | Mitsubishi Heavy Industries, Ltd. | Vertical pump and urea synthesis plant |
| US11542947B2 (en) | 2017-01-10 | 2023-01-03 | Mitsubishi Heavy Industries, Ltd. | Liquid pressurizing apparatus and urea synthesis plant |
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