JPS6338599B2 - - Google Patents
Info
- Publication number
- JPS6338599B2 JPS6338599B2 JP7273681A JP7273681A JPS6338599B2 JP S6338599 B2 JPS6338599 B2 JP S6338599B2 JP 7273681 A JP7273681 A JP 7273681A JP 7273681 A JP7273681 A JP 7273681A JP S6338599 B2 JPS6338599 B2 JP S6338599B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- storage tank
- stratification
- tank
- nozzle
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/021—Special adaptations of indicating, measuring, or monitoring equipment having the height as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
- F17C13/126—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for large storage containers for liquefied gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0119—Shape cylindrical with flat end-piece
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/052—Size large (>1000 m3)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
- F17C2223/042—Localisation of the removal point
- F17C2223/046—Localisation of the removal point in the liquid
- F17C2223/047—Localisation of the removal point in the liquid with a dip tube
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/04—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by other properties of handled fluid after transfer
- F17C2225/041—Stratification
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は液槽（タンク）内の貯蔵液が複数層に
分離して層状化する現象を検知する方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for detecting a phenomenon in which a stored liquid in a liquid tank is separated into a plurality of layers and stratified.
タンク内に比重差のある複数種の液体を収容す
ると複数層に分離して層状化することは広く知ら
れている。しかしながら単に比重差ばかりでな
く、組成や温度差の異なる複数の液体を収容した
場合でも層状化し、また多成分均一液の貯蔵中に
低沸点成分が優先的に蒸発する場合などにも層状
化がみられる。
It is widely known that when multiple types of liquids with different specific gravities are stored in a tank, they separate into multiple layers and form layers. However, stratification occurs not only due to specific gravity differences, but also when multiple liquids with different compositions and temperature differences are stored, and also when low-boiling components evaporate preferentially during storage of a multicomponent homogeneous liquid. Be looked at.
たとえば液化天然ガス（LNG）に代表される
常圧低温液化ガスのタンクにおいて、貯蔵液の減
少に伴つて、残液のあるまま新しい液を充填する
と、液の組成にわずかな差を有すること、および
温度差があること等が原因して残液と補充液とが
二層に分離して層状化現象が発生する。上記
LNGの場合層状化が発生すると、上層液の温度
はタンクの上部空間圧力に応じた飽和温度に維持
されるが、下層液の温度はタンク側面および底面
からの熱の侵入および放熱阻止作用のため、上層
液の水頭分の飽和温度まで温度が上昇する。そし
て下層液にこのようなエネルギーが蓄積されて上
層と下層の液密度が等しくなると突然に急激な蒸
発現象（ロールオーバ現象と称す。）が発生し、
最悪の場合にはタンクの内圧上昇のためタンク破
壊を招き大惨事に至ることも予想される。 For example, in a tank for normal-pressure, low-temperature liquefied gas such as liquefied natural gas (LNG), when the stored liquid decreases and new liquid is filled with the remaining liquid, there may be a slight difference in the composition of the liquid. Also, due to temperature differences, the residual liquid and the replenisher separate into two layers, resulting in a stratification phenomenon. the above
In the case of LNG, when stratification occurs, the temperature of the upper liquid is maintained at the saturation temperature according to the pressure in the upper space of the tank, but the temperature of the lower liquid is reduced due to the action of preventing heat intrusion and heat radiation from the sides and bottom of the tank. , the temperature rises to the saturation temperature of the water head of the upper layer liquid. When such energy is accumulated in the lower layer liquid and the liquid densities of the upper and lower layers become equal, a rapid evaporation phenomenon (referred to as a rollover phenomenon) suddenly occurs.
In the worst case scenario, the tank's internal pressure could rise, leading to tank destruction and a catastrophe.
したがつてタンク内の層状化現象はこれを予め
検知し、ロールオーバ現象を未然に防止する必要
がある。 Therefore, it is necessary to detect the stratification phenomenon in the tank in advance and prevent the rollover phenomenon.
従来においては、タンク内における液の深さ方
向の温度分布を計測して層状化現象を検知してい
た。 Conventionally, the stratification phenomenon has been detected by measuring the temperature distribution in the depth direction of the liquid inside the tank.
しかしながら、液深方向に温度差が発生するの
は層状化が発生してかなりの時間経過後であり、
また温度差が生じるということはロールオーバ現
象の発生が近い段階となつているので従来のよう
な深さ方向の温度差を検知する方法は好ましくな
い。しかも温度測定は周囲温度の影響を受け易い
ので高精度な温度差の測定ができず、判定のパラ
メータとして信頼性に乏しい不具合があつた。
However, temperature differences occur in the direction of liquid depth only after a considerable time has elapsed after stratification has occurred.
Furthermore, since the occurrence of a temperature difference means that the rollover phenomenon is about to occur, the conventional method of detecting a temperature difference in the depth direction is not preferable. Moreover, since temperature measurement is easily influenced by the ambient temperature, it is not possible to measure temperature differences with high precision, resulting in a problem of poor reliability as a parameter for determination.
本発明はこのような事情にもとづきなされたも
ので、その目的とするところは、貯槽内の層状化
現象を速やかにかつ高精度に検知でき、検知後の
安全等の対策を迅速に行うことができる貯槽液の
層状化検知方法を提供しようとするものである。 The present invention was made based on the above circumstances, and its purpose is to be able to detect the stratification phenomenon in the storage tank quickly and with high precision, and to quickly take safety measures after the detection. The present invention aims to provide a method for detecting stratification of a storage tank liquid.
本発明は、貯槽内の下部にこの貯槽内の液を吸
い込んで吐出するポンプおよびこのポンプにより
吐出された液をこの貯槽液中を通じて液面に向け
て噴射する噴出ノズルを設けるとともに、上記貯
槽内の上部に上記貯槽液の液面を貯槽の外部から
監視する装置を設け、上記噴出ノズルより貯槽液
の液面に向けて噴射液を所定強さで噴射し、上記
液面監視装置によつてこの液面に波動が発生しな
いことを観察して層状化現象の発生を知るように
したことを特徴とする。
The present invention provides a pump that sucks in and discharges the liquid in the storage tank at the lower part of the storage tank, and a jet nozzle that injects the liquid discharged by the pump toward the liquid surface through the liquid in the storage tank. A device for monitoring the liquid level of the storage tank liquid from the outside of the storage tank is provided on the upper part of the storage tank, and the injection liquid is injected with a predetermined strength from the jet nozzle toward the liquid level of the storage tank liquid, and the liquid level is monitored by the liquid level monitoring device. The present invention is characterized in that the occurrence of the stratification phenomenon can be determined by observing that no waves are generated on the liquid surface.
本発明の方法によれば、貯槽内に収容された液
が層状化していない場合は、ポンプを起動して噴
出ノズルから液を所定の強さで噴射するとこの噴
流は容易に液面に達し、このため液面に波動が発
生する。したがつて、この波動を液面監視装置に
より観察すれば貯槽液が層状化していないことを
知ることができる。
According to the method of the present invention, if the liquid contained in the storage tank is not stratified, when the pump is activated and the liquid is injected from the jet nozzle at a predetermined strength, this jet stream easily reaches the liquid level. This causes waves on the liquid surface. Therefore, by observing these waves using a liquid level monitoring device, it can be determined that the storage tank liquid is not stratified.
これに対し、貯槽液が層状化している場合は、
噴出ノズルから噴射された液は層状化の境界面で
噴射流エネルギーが消費されるため液上面に達せ
ず、よつて液面に波動が生じない。このためこの
液面を上記液面監視装置により観察すれば層状化
が発生していることを知ることができる。 On the other hand, if the storage tank liquid is stratified,
The liquid ejected from the ejection nozzle does not reach the upper surface of the liquid because the jet energy is consumed at the stratified interface, and therefore no waves are generated on the liquid surface. Therefore, by observing this liquid level using the liquid level monitoring device, it can be known that stratification has occurred.
以下本発明の一実施例を図面にもとづき説明す
る。
An embodiment of the present invention will be described below based on the drawings.
図中１は貯槽、すなわちタンクである。このタ
ンク１の下部には液注入管２が連通されており、
この液注入管２は開閉弁３によつて開閉される。
上記タンク１内には底部に近接してポンプ４が配
置されている。このポンプ４はタンク１内の貯槽
液を吸い込んで、吐出管５に吐出するようになつ
ており、この吐出管５はタンク１の側壁に沿つて
上方に導びかれ、タンク１の天井面６を貫通して
Ｕ字形に曲成され、再びタンク１内に導入されて
底部に導びかれている。そしてこの吐出管５の先
端には噴出ノズル７が接続されており、このノズ
ル７は上方に向つて開口されている。したがつて
ポンプ４に吸い込まれた貯槽液は吐出管５を通じ
てノズル７に送られ、このノズル７から噴流とな
つて液中を上方につまり液面に向かつて噴出され
る。上記タンク１のたとえば天井面６にはモニタ
カメラ８が取り付けられている。このカメラ８は
液面の揺動、波動状態を写すようになつており、
特に上記ノズル７から噴射された噴流によつて起
動する液面の発生具合を監視するようになつてい
る。このカメラ８で写した映像はモニタテレビ９
に写し出されるようになつている。 In the figure, 1 is a storage tank, that is, a tank. A liquid injection pipe 2 is connected to the lower part of this tank 1.
This liquid injection pipe 2 is opened and closed by an on-off valve 3.
Inside the tank 1, a pump 4 is arranged close to the bottom. This pump 4 sucks in the storage liquid in the tank 1 and discharges it into a discharge pipe 5. This discharge pipe 5 is guided upward along the side wall of the tank 1, and is connected to the ceiling surface 6 of the tank 1. It is bent into a U-shape through the tank 1, and then introduced into the tank 1 and guided to the bottom. A jet nozzle 7 is connected to the tip of the discharge pipe 5, and the nozzle 7 is opened upward. Therefore, the storage tank liquid sucked into the pump 4 is sent to the nozzle 7 through the discharge pipe 5, and from this nozzle 7 is ejected as a jet upward through the liquid, that is, toward the liquid surface. A monitor camera 8 is attached to the ceiling surface 6 of the tank 1, for example. This camera 8 is designed to photograph the fluctuation and wave state of the liquid level.
In particular, the level of liquid level generated by the jet stream ejected from the nozzle 7 is monitored. The image captured by this camera 8 is displayed on the monitor TV 9.
It is becoming more and more visible in the images.
上記のごとき基本的構成を採用して層状化現象
を検知する方法について、その原理にもとづき説
明する。タンク１内の貯槽液が層状化していない
場合には第１図のようになる。すなわちポンプ４
の起動にもとづきノズル７から噴出された噴射液
は、貯槽液の成分や温度が均一であることから、
そのジエツトエネルギーが貯槽液に吸収される割
合が少く、よつて液中を進んで液上面まで到達す
る。このため液上面は上記噴射液によつて波動を
生じ、比較的激しく揺動することになる。このよ
うな液上面の波動、揺動はモニタカメラ８によつ
て撮影されてモニタテレビ９に写し出される。よ
つて監視員はモニタテレビ９に写し出された液面
の波動具合を観察して層状化のないことを知る。 A method of detecting a stratification phenomenon by employing the above basic configuration will be explained based on its principle. If the storage liquid in the tank 1 is not stratified, it will be as shown in FIG. 1. i.e. pump 4
The injection liquid ejected from the nozzle 7 based on the activation of the storage tank liquid is uniform in composition and temperature.
The rate at which the jet energy is absorbed by the liquid in the storage tank is small, so it travels through the liquid and reaches the upper surface of the liquid. For this reason, the liquid upper surface generates waves due to the above-mentioned jetted liquid, and swings relatively violently. Such waves and oscillations on the upper surface of the liquid are photographed by a monitor camera 8 and displayed on a monitor television 9. Therefore, the monitor observes the wave state of the liquid surface displayed on the monitor television 9 and knows that there is no stratification.
一方、タンク１内の貯槽液が減少されて液注入
管２から新規な液が補充された場合などには、残
液と補充液との若干の組成差や温度差によつて第
２図のように二層１０，１１に分離し、いわゆる
層状化する。この場合、ノズル７から噴出された
噴射液は上層液１０と下層液１１との境界面１２
に衝突する。この衝突は境界面１２を揺動させる
が、噴射液がこの境界面１２を突き破つて液上面
まで達することは容易でない。この原因は明確で
ないが、上層液１０と下層液１１とではジエツト
エネルギーの吸収率が異なることに起因している
ものと推察される。このため液上面においては噴
射液の影響が少ないから波動を生じなく、またた
とえ生じてもその波動や揺動はきわめて小さい。
よつてこの液面状態をモニタカメラ８を通じてモ
ニタテレビ９で観察すれば層状化が判ることにな
る。 On the other hand, when the storage liquid in the tank 1 is reduced and a new liquid is replenished from the liquid injection pipe 2, the difference in composition and temperature between the remaining liquid and the replenishing liquid may occur as shown in Fig. 2. It separates into two layers 10 and 11, so-called stratification. In this case, the injection liquid ejected from the nozzle 7 reaches the boundary surface 12 between the upper liquid 10 and the lower liquid 11.
collide with Although this collision causes the boundary surface 12 to swing, it is not easy for the jetted liquid to break through this boundary surface 12 and reach the upper surface of the liquid. Although the cause of this is not clear, it is presumed that the upper layer liquid 10 and the lower layer liquid 11 have different absorption rates of jet energy. Therefore, since the influence of the injected liquid is small on the upper surface of the liquid, no waves are generated, and even if they occur, the waves and fluctuations are extremely small.
Therefore, if this liquid level state is observed on the monitor television 9 through the monitor camera 8, stratification will be seen.
したがつて新しい液を注入した場合などには、
その注入時から継続してノズル７から噴射液を噴
射し、液面状態を連続的に観察してゆけば、液面
が静止もしくは波動や揺動が小さくなることによ
つて層状化を知ることができる。 Therefore, when injecting new fluid,
If the liquid is continuously injected from the nozzle 7 from the time of injection and the liquid level is continuously observed, stratification can be detected when the liquid level is stationary or the waves and fluctuations become small. Can be done.
なお上記原理について模型実験を行つた例を説
明する。 An example of a model experiment based on the above principle will be explained.
ノズル７の口径を２mmとし、噴射流量を0.2
m3／ｈに設定してなるタンク内に、種々の液体を
貯槽し、これが層状化したときに上記噴射条件で
噴射流を発生させた。この結果、上層液１０と下
層液１１との比重差が１％以上あり、しかもノズ
ル吐出口先端と境界面との距離が32cm以上であれ
ば、層状化しているときに上層液１０の上面には
波動や揺動が生じないことが認められた。 The diameter of the nozzle 7 is 2 mm, and the injection flow rate is 0.2.
Various liquids were stored in a tank set at m 3 /h, and when the liquid became stratified, a jet flow was generated under the above jet conditions. As a result, if the difference in specific gravity between the upper layer liquid 10 and the lower layer liquid 11 is 1% or more, and the distance between the nozzle outlet tip and the boundary surface is 32 cm or more, the upper surface of the upper layer liquid 10 during stratification. It was observed that no waves or fluctuations occur.
これに対し、層状化していない場合には、上記
と同じ噴射条件でノズル吐出口先端と液上面との
距離が172cmであつても噴射液が液上面に達して
波動が発生することが判つた。 On the other hand, in the case of non-stratification, it was found that even if the distance between the nozzle outlet tip and the liquid top surface was 172 cm under the same jetting conditions as above, the jetted liquid would reach the liquid top surface and waves would occur. .
したがつて検知しようとする液体の種類や液面
高さ等に応じてノズル口径や噴射流量を適宜選択
採用すれば、この原理にもとづき層状化の有無を
検知できることができる。 Therefore, the presence or absence of stratification can be detected based on this principle by appropriately selecting and adopting the nozzle diameter and injection flow rate depending on the type of liquid to be detected, the liquid level height, etc.
このような層状化検知方法によると、層状化の
始まる前兆段階や層状化の初期段階でもその具合
を知ることができ、従来の温度分布測定法に比べ
て層状化を知る時期を早くすることができる。こ
のことは層状化後の対策に時間的余裕をもつて対
応できるばかりでなく、たとえばLNGタンクな
どで発生が心配されるロールオーバ現象を未然に
防止できるようになり、安全性が向上する。 According to such a stratification detection method, it is possible to know the condition even at the early stage of stratification or at the early stages of stratification, and it is possible to detect stratification earlier than with conventional temperature distribution measurement methods. can. This not only allows for more time to take measures after stratification, but also improves safety by preventing the rollover phenomenon that is feared to occur in LNG tanks, for example.
しかも噴射液をノズル７から噴射させる場合、
周囲温度などの影響を受けないので高精度な検知
も可能になる。 Moreover, when the injection liquid is injected from the nozzle 7,
Highly accurate detection is also possible because it is not affected by ambient temperature, etc.
なお、上記実施例にあつては、液上面の運動状
況をモニタカメラ８を通じてモニタテレビ９で観
察するようにしたが、たとえばサイトグラスや液
面計、フロートゲージなどによつても検知するこ
とができるので実施例には限らない。 In the above embodiment, the movement of the upper surface of the liquid was observed on the monitor television 9 through the monitor camera 8, but it may also be detected using a sight glass, liquid level gauge, float gauge, etc. Since it can be done, it is not limited to the embodiment.
また本発明はLNGタンクばかりでなく、LNG
タンクや低温液化ガスタンクなどの安全対策にも
使用することができ、またその他複数種の液を混
合したタンクなどで、層状化の防止が望まれるよ
うなときの検知手段にも適用可能である。 Furthermore, the present invention is applicable not only to LNG tanks but also to LNG tanks.
It can also be used as a safety measure for tanks and low-temperature liquefied gas tanks, and can also be applied as a detection means when preventing stratification is desired, such as in tanks containing a mixture of multiple types of liquids.
以上詳述した通り本発明は、貯槽内の下部に設
けた噴出ノズルから液上面に向けて噴流液を所定
の強さで噴射し、この噴射エネルギーによつて液
上面が波動等の運動を生じる状態を外部液面監視
装置によつて観察するようにし、層状化している
場合には液上面の運動がほとんどないことを利用
して層状化の有無を検知するようにしたものであ
る。したがつてこの方法はノズルから液を噴出さ
せるだけであるため周囲雰囲気の影響を受け難
く、検知が高精度に行える。また層状化の初期段
階で検知できるので層状化後に必要とされる対策
や処理を速やかに行えるなどの利点がある。
As detailed above, the present invention jets a jet of liquid at a predetermined intensity toward the upper surface of the liquid from the jet nozzle provided at the lower part of the storage tank, and this jetting energy causes the upper surface of the liquid to move such as waves. The state is observed using an external liquid level monitoring device, and when stratification occurs, the presence or absence of stratification is detected by utilizing the fact that there is almost no movement of the upper surface of the liquid. Therefore, since this method only involves ejecting liquid from a nozzle, it is less affected by the surrounding atmosphere and can perform detection with high precision. Furthermore, since stratification can be detected at an early stage, it has the advantage that necessary countermeasures and treatments can be quickly implemented after stratification occurs.
図面は本発明方法の一実施例を説明するもので
あり、第１図は非層状化状態を示す図、第２図は
層状化した状態を示す図である。
１……タンク、４……ポンプ、７……噴出ノズ
ル、８……モニタカメラ、９……モニタテレビ。
The drawings are for explaining one embodiment of the method of the present invention, and FIG. 1 shows a non-stratified state, and FIG. 2 shows a stratified state. 1...Tank, 4...Pump, 7...Blowout nozzle, 8...Monitor camera, 9...Monitor TV.
Claims (1)
吐出するポンプおよびこのポンプにより吐出され
た液をこの貯槽液中を通じて液面に向けて噴射す
る噴出ノズルを設けるとともに、上記貯槽内の上
部に上記貯槽液の液面を貯槽の外部から監視する
装置を設け、上記噴出ノズルより貯槽液の液面に
向けて噴射液を所定の強さで噴射し、上記液面監
視装置によつて液面に波動が発生しないことを観
察して層状化現象の発生を知るようにしたことを
特徴とする貯槽液の層状化現象検知方法。1 A pump that sucks in and discharges the liquid in this storage tank and a jet nozzle that injects the liquid discharged by this pump toward the liquid surface through the liquid in this storage tank are installed in the lower part of the storage tank, and a pump is installed in the upper part of the storage tank. A device for monitoring the liquid level of the storage tank liquid from outside the storage tank is provided, and the jetting liquid is injected with a predetermined strength from the jet nozzle toward the liquid level of the storage tank liquid, and the liquid level is monitored by the liquid level monitoring device. A method for detecting a stratification phenomenon in a storage tank liquid, characterized in that the occurrence of a stratification phenomenon is determined by observing that no waves are generated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7273681A JPS57190197A (en) | 1981-05-14 | 1981-05-14 | Detecting method of stratified phenomenon in tank storage liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7273681A JPS57190197A (en) | 1981-05-14 | 1981-05-14 | Detecting method of stratified phenomenon in tank storage liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57190197A JPS57190197A (en) | 1982-11-22 |
| JPS6338599B2 true JPS6338599B2 (en) | 1988-08-01 |
Family
ID=13497936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7273681A Granted JPS57190197A (en) | 1981-05-14 | 1981-05-14 | Detecting method of stratified phenomenon in tank storage liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57190197A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206614B (en) * | 2013-04-01 | 2015-05-20 | 中山大学 | Early-warning device and early-warning method used for monitoring accidents of boiling liquid expanding vapor explosion (BLEVE) of pressuring-bearing storage tanks |
| US10098274B1 (en) * | 2017-09-19 | 2018-10-16 | Michael J. Meier | Compost insertion apparatus |
| CN108561751A (en) * | 2018-04-24 | 2018-09-21 | 安徽巨力能源有限公司 | A kind of natural gas storage tank security context monitoring system |
| KR102732330B1 (en) * | 2018-05-30 | 2024-11-20 | 가즈트랑스포르 에 떼끄니가즈 | Liquefied gas storage device |
| FR3081967B1 (en) * | 2018-05-30 | 2020-12-25 | Gaztransport Et Technigaz | LIQUEFIED GAS STORAGE DEVICE |
| CN115591278B (en) * | 2022-09-30 | 2025-06-06 | 浙江盛汇化工有限公司 | A drying device for preventing condensation water of leather retanning agent |
-
1981
- 1981-05-14 JP JP7273681A patent/JPS57190197A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57190197A (en) | 1982-11-22 |
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