JPH09323791A - High pressure vessel - Google Patents
High pressure vesselInfo
- Publication number
- JPH09323791A JPH09323791A JP8142625A JP14262596A JPH09323791A JP H09323791 A JPH09323791 A JP H09323791A JP 8142625 A JP8142625 A JP 8142625A JP 14262596 A JP14262596 A JP 14262596A JP H09323791 A JPH09323791 A JP H09323791A
- Authority
- JP
- Japan
- Prior art keywords
- skirt
- pressure vessel
- cooling
- temperature
- cooling pipe
- 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
Links
- 238000001816 cooling Methods 0.000 claims abstract description 56
- 239000011810 insulating material Substances 0.000 claims abstract description 7
- 239000011796 hollow space material Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 description 9
- 230000035882 stress Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Control Of Temperature (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
(57)【要約】
【課題】 大形の高温圧力容器のスカート取付部に高応
力部を発生させることなく、急速に加熱又は冷却するこ
とができる高温圧力容器を提供する。
【解決手段】 圧力容器３を支持する円筒形スカート部
１１と、スカート部の内側に設けられ、かつ圧力容器，
スカート部，及び保温材１２で囲まれたホットボックス
１３と、圧力容器内に冷却空気を供給する容器冷却管１
４からホットボックス内に冷却空気を供給するスカート
冷却管１６と、スカート取付部を間隔を隔てて水平に囲
む複数の電気ヒータ１７とを備え、ホットボックス１３
により圧力容器とスカート部の間の輻射伝熱を促進し、
急冷時にはスカート冷却管１６を介してホットボックス
内に冷却空気を供給して圧力容器の急冷に応じてスカー
ト部を急冷し、同時に複数の電気ヒータ１７によりスカ
ート取付部の温度勾配を調節する。
(57) Abstract: A high temperature pressure vessel capable of being rapidly heated or cooled without generating a high stress portion in a skirt mounting portion of a large-sized high temperature pressure vessel. A cylindrical skirt portion (11) for supporting a pressure vessel (3) and a pressure vessel provided inside the skirt portion,
A hot box 13 surrounded by a skirt portion and a heat insulating material 12, and a container cooling pipe 1 for supplying cooling air into the pressure container.
4, a skirt cooling pipe 16 for supplying cooling air into the hot box, and a plurality of electric heaters 17 horizontally surrounding the skirt mounting portion with a space therebetween are provided.
Promotes radiant heat transfer between the pressure vessel and the skirt,
At the time of rapid cooling, cooling air is supplied into the hot box through the skirt cooling pipe 16 to rapidly cool the skirt portion in response to rapid cooling of the pressure vessel, and at the same time, a plurality of electric heaters 17 adjust the temperature gradient of the skirt mounting portion.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、温度差の生じる支
持部を有する高温圧力容器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high temperature pressure vessel having a support portion that causes a temperature difference.
【０００２】[0002]
【従来の技術】高温で使用する大形圧力容器（例えば、
加圧流動層の格納容器、原子炉圧力容器、等）では、起
動停止の度に、圧力容器の温度が常温と高温（例えば約
３００〜３５０℃）との間を加熱／冷却され、その度に
圧力容器を支持するスカート取付部に大きな温度勾配が
でき、部分的に大きな熱応力が発生する。このため、か
かる高温圧力容器では、図２（Ａ）に示すように、スカ
ート１の取付部１ａにホットボックスと呼ぶ保温のない
空間２を設け、圧力容器３からの輻射によりスカート取
付部１ａを加熱／冷却して温度差を低減すると共に、圧
力容器３の起動停止（加熱／冷却）をゆっくりと行って
いる。2. Description of the Related Art Large pressure vessels used at high temperatures (for example,
In the containment vessel of the pressurized fluidized bed, the reactor pressure vessel, etc.), the temperature of the pressure vessel is heated / cooled between normal temperature and high temperature (for example, about 300 to 350 ° C.) each time the power supply is stopped. In addition, a large temperature gradient is generated in the skirt mounting portion that supports the pressure vessel, and a large thermal stress is generated locally. Therefore, in such a high temperature pressure vessel, as shown in FIG. 2A, a space 2 called a hot box having no heat retention is provided in the mounting portion 1a of the skirt 1, and the skirt mounting portion 1a is radiated from the pressure vessel 3 to radiate the skirt mounting portion 1a. The temperature difference is reduced by heating / cooling, and the pressure vessel 3 is slowly started / stopped (heating / cooling).
【０００３】[0003]
【発明が解決しようとする課題】上述した高温圧力容器
では装置の運転上の必要性により急速な起動（加熱）や
停止（冷却）が不可欠である場合があり、冷却の場合に
は、図２（Ａ）に示すように、予め強制冷却用の冷却管
４を圧力容器３を貫通して設け、圧力容器３の内面に冷
却空気を吹き付けて圧力容器３を強制冷却して１〜２日
で急速に圧力容器を冷却するようになっている。しか
し、この場合には、大きな温度勾配の発生が避けがた
く、スカート取付部１ａに図２（Ｂ）に示す高応力部が
発生してしまい、疲労損傷を受けることがある問題点が
あった。In the above-mentioned high temperature pressure vessel, rapid startup (heating) or stop (cooling) may be indispensable due to the operational requirements of the apparatus, and in the case of cooling, FIG. As shown in (A), a cooling pipe 4 for forced cooling is provided in advance through the pressure vessel 3, and cooling air is blown to the inner surface of the pressure vessel 3 to forcibly cool the pressure vessel 3 and it takes 1-2 days. It is designed to cool the pressure vessel rapidly. However, in this case, a large temperature gradient is unavoidably generated, and a high stress portion shown in FIG. 2B is generated in the skirt mounting portion 1a, which may cause fatigue damage. .
【０００４】本発明は、かかる問題点を解決するために
創案されたものである。すなわち、本発明の目的は、大
形の高温圧力容器のスカート取付部に高応力部を発生さ
せることなく、急速に加熱又は冷却することができる高
温圧力容器を提供することにある。The present invention was devised to solve such problems. That is, an object of the present invention is to provide a high temperature pressure vessel that can be rapidly heated or cooled without generating a high stress portion in the skirt mounting portion of a large-sized high temperature pressure vessel.
【０００５】[0005]
【課題を解決するための手段】本発明によれば、圧力容
器を支持する円筒形スカート部と、該スカート部の内側
に設けられ、かつ圧力容器，スカート部，及び保温材で
囲まれたドーナツ状中空空間と、圧力容器冷却ファンか
ら圧力容器を貫通して内部に冷却空気を供給する容器冷
却管と、を備えた高温圧力容器において、前記容器冷却
管からドーナツ状中空空間内に冷却空気を供給するスカ
ート冷却管と、前記スカート取付部を間隔を隔てて水平
に囲む複数の電気ヒータと、を備えた、ことを特徴とす
る高温圧力容器が提供される。According to the present invention, a cylindrical skirt portion for supporting a pressure vessel, and a donut provided inside the skirt portion and surrounded by the pressure vessel, the skirt portion and a heat insulating material. In a doughnut-shaped hollow space in a doughnut-shaped hollow space, in a high-temperature pressure container comprising: There is provided a high temperature pressure vessel, comprising: a skirt cooling pipe to be supplied; and a plurality of electric heaters horizontally surrounding the skirt mounting portion with a space therebetween.
【０００６】上記本発明の構成によれば、加熱時にはド
ーナツ状中空空間をホットボックスとして作用させて、
圧力容器とスカート部の間の輻射伝熱を促進し、複数の
電気ヒータによりスカート取付部の温度上昇を促進させ
温度勾配を調節することができる。また、急冷時にはス
カート冷却管を介してホットボックス内に冷却空気を供
給して、圧力容器の急冷に応じてスカート部を急冷し、
スカート部の温度を調節することができる。従って、大
形の高温圧力容器のスカート取付部に高応力部を発生さ
せることなく、急速に加熱又は冷却することができる。According to the configuration of the present invention, the donut-shaped hollow space acts as a hot box during heating,
The radiant heat transfer between the pressure vessel and the skirt portion can be promoted, and the temperature rise of the skirt mounting portion can be promoted by the plurality of electric heaters to adjust the temperature gradient. Also, during rapid cooling, cooling air is supplied into the hot box via the skirt cooling pipe, and the skirt is rapidly cooled according to the rapid cooling of the pressure vessel,
The temperature of the skirt can be adjusted. Therefore, it is possible to rapidly heat or cool the skirt mounting portion of a large-sized high temperature pressure vessel without generating a high stress portion.
【０００７】本発明の好ましい実施形態によれば、前記
スカート冷却管に設けられた流量調節器と、前記スカー
ト取付部の温度を検出する温度センサーと、該温度セン
サーの出力により前記電気ヒータの出力を調節する温度
制御装置と、を更に備える。この構成により、流量調節
器（例えば、オリフィス，流量調節弁）により、圧力容
器の急冷に応じて必要な冷却空気量をホットボックス内
に供給してスカート部を急冷し、同時にスカート取付部
の温度分布を温度センサーで検出しながら、電気ヒータ
で必要な加熱を行うことができ、急加熱又は急冷時のス
カート取付部の非定常温度分布を制御することができ
る。According to a preferred embodiment of the present invention, a flow controller provided in the skirt cooling pipe, a temperature sensor for detecting a temperature of the skirt mounting portion, and an output of the electric heater according to an output of the temperature sensor. And a temperature control device for adjusting the temperature. With this configuration, the flow rate controller (eg, orifice, flow rate control valve) supplies the required cooling air amount into the hot box according to the rapid cooling of the pressure vessel to rapidly cool the skirt portion, and at the same time, the temperature of the skirt mounting portion. The electric heater can perform necessary heating while detecting the distribution with the temperature sensor, and the unsteady temperature distribution of the skirt mounting portion during rapid heating or rapid cooling can be controlled.
【０００８】[0008]
【発明の実施の形態】以下、本発明の好ましい実施形態
を図面を参照して説明する。なお、各図において共通す
る部分には同一の符号を付し重複した説明を省略する。
図１は、本発明による高温圧力容器のスカート部構成図
である。この図に示すように、本発明の高温圧力容器１
０は、圧力容器３を支持する円筒形スカート部１１と、
スカート部１１の内側に設けられ、かつ圧力容器３，ス
カート部１１，及び保温材１２で囲まれたドーナツ状中
空空間１３と、圧力容器冷却ファン１５から圧力容器３
を貫通して内部に冷却空気を供給する容器冷却管１４
と、を備えている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In the drawings, common portions are denoted by the same reference numerals, and redundant description is omitted.
FIG. 1 is a schematic diagram of a skirt portion of a high temperature pressure vessel according to the present invention. As shown in this figure, the high temperature pressure vessel 1 of the present invention
0 is a cylindrical skirt portion 11 that supports the pressure vessel 3,
The doughnut-shaped hollow space 13 provided inside the skirt portion 11 and surrounded by the pressure vessel 3, the skirt portion 11, and the heat insulating material 12, and the pressure vessel cooling fan 15 to the pressure vessel 3
Container cooling pipe 14 for supplying cooling air through the pipe
And
【０００９】円筒形スカート部１１は、下端が基礎用の
鉄骨に固定され、或いはコンクートで埋設されて圧力容
器３の大重量（例えば加圧流動層では４０００トン以
上）を基礎部に円滑に伝えるようになっている。この円
筒形スカート部１１の上端は、圧力容器３の下部に溶接
されている。また、圧力容器３への取付部１１ａは、図
に示すように容器との接続部を厚肉として、圧力容器３
からの伝熱量を増加させ、かつ下方の肉厚を減らして構
成されている。この構成により、熱応力の増大を抑制す
るようになっている。The lower end of the cylindrical skirt portion 11 is fixed to a steel frame for a foundation or is embedded in a concrete so that a large weight of the pressure vessel 3 (for example, 4000 tons or more in a pressurized fluidized bed) can be smoothly transmitted to the foundation portion. It is like this. The upper end of the cylindrical skirt portion 11 is welded to the lower portion of the pressure vessel 3. Further, as shown in the figure, the attachment portion 11a to the pressure container 3 has a thick connecting portion with the container, so that the pressure container 3
It is configured by increasing the amount of heat transfer from and reducing the thickness of the lower part. With this configuration, an increase in thermal stress is suppressed.
【００１０】保温材１２は、圧力容器３とスカート部１
１で挟まれた断面がほぼ三角形の空間（ドーナツ状中空
空間１３）を除いて施工されている。すなわち、圧力容
器３のほとんどの外面、及び円筒形スカート部１１のほ
とんどの外面に保温材１２が取り付けられ、放熱ロスを
防いでいるが、ドーナツ状中空空間１３は保温せず、こ
の空間をホットボックスとして作用させるようになって
いる。The heat insulating material 12 includes a pressure vessel 3 and a skirt portion 1.
The cross section sandwiched by 1 is constructed except for a substantially triangular space (a donut-shaped hollow space 13). That is, the heat insulating material 12 is attached to most of the outer surface of the pressure vessel 3 and most of the outer surface of the cylindrical skirt portion 11 to prevent heat loss, but the donut-shaped hollow space 13 does not retain heat and the space is hot. It is designed to act as a box.
【００１１】この構成により、ドーナツ状中空空間１３
内の空気が圧力容器３からの伝熱により高温になり、ス
カート部１１を対流伝熱で加熱すると共に、圧力容器３
からの輻射によってもスカート部１１を加熱することが
できる。また、冷却時にも同様に対流伝熱と輻射伝熱に
より両者の温度差を低減するように作用する。With this structure, the donut-shaped hollow space 13 is formed.
The air inside has a high temperature due to heat transfer from the pressure vessel 3 and heats the skirt 11 by convective heat transfer, and at the same time, the pressure vessel 3
The skirt portion 11 can be heated by radiation from the skirt. Further, during cooling, the convective heat transfer and the radiant heat transfer similarly act to reduce the temperature difference between the two.
【００１２】圧力容器冷却ファン１５は、圧力容器３の
外部に設置さており、容器冷却管１４を介して、圧力容
器３内に冷却空気を供給するようになっている。この圧
力容器冷却ファン１５は、高温圧力容器３を急冷する必
要がある場合（例えば、内部機器のメンテナンス等）に
のみ稼働され、加熱時や通常の運転時には停止してい
る。The pressure vessel cooling fan 15 is installed outside the pressure vessel 3 and supplies cooling air into the pressure vessel 3 through the vessel cooling pipe 14. The pressure vessel cooling fan 15 is operated only when the high temperature pressure vessel 3 needs to be rapidly cooled (for example, maintenance of internal equipment), and is stopped during heating or during normal operation.
【００１３】本発明の高温圧力容器１０は、更に、容器
冷却管１４からドーナツ状中空空間１３（ホットボック
ス）内に冷却空気を供給するスカート冷却管１６と、ス
カート取付部１１ａを上下に間隔を隔てて水平に囲む複
数の電気ヒータ１７と、を備えている。また、この実施
形態では、スカート冷却管１６に設けられた流量調節器
１６ａと、スカート取付部１１ａの温度を検出する温度
センサー１８と、温度センサー１８の出力により電気ヒ
ータ１７の出力を調節する温度制御装置１９とを更に備
えている。The high temperature pressure vessel 10 of the present invention further includes a skirt cooling tube 16 for supplying cooling air from the vessel cooling tube 14 into the donut-shaped hollow space 13 (hot box), and a skirt mounting portion 11a with a vertical interval. And a plurality of electric heaters 17 that are separated and horizontally surrounded. Further, in this embodiment, the flow rate controller 16a provided in the skirt cooling pipe 16, a temperature sensor 18 for detecting the temperature of the skirt mounting portion 11a, and a temperature for adjusting the output of the electric heater 17 by the output of the temperature sensor 18. The control device 19 is further provided.
【００１４】上述した構成により、流量調節器１６ａ
（例えば、オリフィス，流量調節弁）により、圧力容器
３の急冷に応じて必要な冷却空気量をホットボックス１
３内に供給してスカート部１１を急冷し、同時にスカー
ト取付部１１ａの温度分布を温度センサー１８で検出し
ながら、加熱時には電気ヒータ１７で必要な加熱を行う
ことができ、急加熱又は急冷時のスカート取付部１１ａ
の非定常温度分布を制御することができる。With the configuration described above, the flow rate controller 16a
(For example, an orifice and a flow rate control valve) are used to adjust the amount of cooling air required for the rapid cooling of the pressure vessel 3 to the hot box 1.
3, the skirt portion 11 is rapidly cooled, and at the same time, the temperature distribution of the skirt mounting portion 11a is detected by the temperature sensor 18, while the electric heater 17 can perform necessary heating at the time of heating. Skirt attachment part 11a
It is possible to control the non-steady temperature distribution of.
【００１５】従って、ドーナツ状中空空間１３をホット
ボックスとして作用させて、圧力容器３とスカート部１
１の間の輻射伝熱を促進し、急冷時にはスカート冷却管
１６を介してホットボックス１３内に冷却空気を供給し
て、圧力容器３の急冷に応じてスカート部１１を急冷
し、同時に複数の電気ヒータ１７によりスカート取付部
１１の温度勾配を調節することができ、大形の高温圧力
容器のスカート取付部１１ａに高応力部を発生させるこ
となく、急速に加熱又は冷却することができる。Therefore, the donut-shaped hollow space 13 acts as a hot box, and the pressure vessel 3 and the skirt portion 1 are
The radiant heat transfer between the two is accelerated, and during the rapid cooling, cooling air is supplied into the hot box 13 through the skirt cooling pipe 16 to rapidly cool the skirt portion 11 in response to the rapid cooling of the pressure vessel 3, and at the same time, a plurality of The electric heater 17 can adjust the temperature gradient of the skirt mounting portion 11, and can rapidly heat or cool the skirt mounting portion 11a of a large-sized high temperature pressure container without generating a high stress portion.
【００１６】なお、本発明は上述した実施例に限定され
ず、本発明の要旨を逸脱しない範囲で種々変更できるこ
とは勿論である。It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.
【００１７】[0017]
【発明の効果】上述したように、本発明によれば、ス
カート部１１に電気ヒータ１７を上下に並べることによ
り、起動時（昇温時）のスカート部の上下温度分布をな
だらかに制御可能となり、スカート部のホットボック
ス１３内に圧力容器冷却ファン１５の出口から取り出し
た配管１６を連結し、その配管途中にオリフィス又は弁
１６ａを設け、流量を調節可能として、停止時（特に強
制冷却時）に圧力容器３の急冷に応じてスカート部１１
を急冷することができる。As described above, according to the present invention, by vertically arranging the electric heaters 17 on the skirt portion 11, it becomes possible to gently control the vertical temperature distribution of the skirt portion at the time of startup (when the temperature is raised). The pipe 16 taken out from the outlet of the pressure vessel cooling fan 15 is connected to the hot box 13 of the skirt, and an orifice or a valve 16a is provided in the middle of the pipe so that the flow rate can be adjusted and at the time of stop (particularly during forced cooling). The skirt portion 11 according to the rapid cooling of the pressure vessel 3.
Can be quenched.
【００１８】従って、本発明の高温圧力容器１０は、ス
カート部１１の容器取付部１１ａ付近の温度とその下部
の温度分布を制御することが可能であり、起動停止を頻
繁に行う運用の圧力容器の支持部応力を低減することが
でき、これにより、信頼性を向上させることができる、
等の優れた効果を有する。Therefore, the high temperature pressure vessel 10 of the present invention is capable of controlling the temperature near the vessel mounting portion 11a of the skirt 11 and the temperature distribution below the vessel mounting portion 11a, and is an operating pressure vessel which is frequently started and stopped. It is possible to reduce the stress of the support portion of the, thereby improving the reliability,
And so on.
【図１】本発明による高温圧力容器のスカート部構成図
である。FIG. 1 is a schematic diagram of a skirt portion of a high temperature pressure vessel according to the present invention.
【図２】従来の高温圧力容器のスカート部構成図であ
る。FIG. 2 is a configuration diagram of a skirt portion of a conventional high temperature pressure vessel.
１ スカート部 １ａ スカート取付部 ２ ホットボックス（保温のない空間） ３ 圧力容器 ４ 冷却管 １０ 高温圧力容器 １１ スカート部 １１ａ スカート取付部 １２ 保温材 １３ 中空空間（ホットボックス） １４ 容器冷却管 １５ 圧力容器冷却ファン １６ スカート冷却管 １６ａ 流量調節器 １７ 電気ヒータ １８ 温度センサー １９ 温度制御装置 1 Skirt part 1a Skirt mounting part 2 Hot box (space without heat retention) 3 Pressure vessel 4 Cooling pipe 10 High temperature pressure vessel 11 Skirt part 11a Skirt mounting part 12 Heat insulating material 13 Hollow space (hot box) 14 Container cooling pipe 15 Pressure vessel Cooling fan 16 Skirt cooling pipe 16a Flow controller 17 Electric heater 18 Temperature sensor 19 Temperature control device
Claims (2)
と、該スカート部の内側に設けられ、かつ圧力容器，ス
カート部，及び保温材で囲まれたドーナツ状中空空間
と、圧力容器冷却ファンから圧力容器を貫通して内部に
冷却空気を供給する容器冷却管と、を備えた高温圧力容
器において、 前記容器冷却管からドーナツ状中空空間内に冷却空気を
供給するスカート冷却管と、前記スカート取付部を間隔
を隔てて水平に囲む複数の電気ヒータと、を備えた、こ
とを特徴とする高温圧力容器。1. A cylindrical skirt portion for supporting a pressure vessel, a donut-shaped hollow space provided inside the skirt portion and surrounded by the pressure vessel, the skirt portion, and a heat insulating material, and a pressure vessel cooling fan. A high temperature pressure vessel comprising: a container cooling pipe that penetrates the pressure container and supplies cooling air to the inside thereof; a skirt cooling pipe that supplies cooling air from the container cooling pipe into a donut-shaped hollow space; and the skirt mounting And a plurality of electric heaters that horizontally surround the parts at intervals.
節器と、前記スカート取付部の温度を検出する温度セン
サーと、該温度センサーの出力により前記電気ヒータの
出力を調節する温度制御装置と、を更に備える、ことを
特徴とする請求項１に記載の高温圧力容器。2. A flow controller provided on the skirt cooling pipe, a temperature sensor for detecting the temperature of the skirt mounting portion, and a temperature control device for adjusting the output of the electric heater by the output of the temperature sensor. The high temperature pressure vessel according to claim 1, further comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14262596A JP3682804B2 (en) | 1996-06-05 | 1996-06-05 | High temperature pressure vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14262596A JP3682804B2 (en) | 1996-06-05 | 1996-06-05 | High temperature pressure vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09323791A true JPH09323791A (en) | 1997-12-16 |
| JP3682804B2 JP3682804B2 (en) | 2005-08-17 |
Family
ID=15319700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14262596A Expired - Fee Related JP3682804B2 (en) | 1996-06-05 | 1996-06-05 | High temperature pressure vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3682804B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879562A (en) * | 2021-01-26 | 2021-06-01 | 中国石油化工股份有限公司 | Protection device for connecting skirt of high-temperature container |
-
1996
- 1996-06-05 JP JP14262596A patent/JP3682804B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879562A (en) * | 2021-01-26 | 2021-06-01 | 中国石油化工股份有限公司 | Protection device for connecting skirt of high-temperature container |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3682804B2 (en) | 2005-08-17 |
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