WO2016006335A1 - Dispositif de détection de rupture de tuyau de vapeur - Google Patents

Dispositif de détection de rupture de tuyau de vapeur Download PDF

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Publication number
WO2016006335A1
WO2016006335A1 PCT/JP2015/064912 JP2015064912W WO2016006335A1 WO 2016006335 A1 WO2016006335 A1 WO 2016006335A1 JP 2015064912 W JP2015064912 W JP 2015064912W WO 2016006335 A1 WO2016006335 A1 WO 2016006335A1
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WO
WIPO (PCT)
Prior art keywords
steam
pipe
vapor
detection
temperature
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Application number
PCT/JP2015/064912
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English (en)
Japanese (ja)
Inventor
英一 中川
中野　修
Original Assignee
住友金属鉱山株式会社
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 住友金属鉱山株式会社 filed Critical 住友金属鉱山株式会社
Publication of WO2016006335A1 publication Critical patent/WO2016006335A1/fr
Priority to PH12016500901A priority Critical patent/PH12016500901A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point

Definitions

  • the present invention relates to a steam pipe breakage detection device. More specifically, the present invention relates to a steam pipe breakage detection device for early detection of damage to a steam pipe through which steam mixed with various harmful substances passes.
  • Patent Document 1 discloses a method for early detection of steam leakage from a casing, a main steam valve, or piping of a steam turbine.
  • an elongated detection tube is extended from a specific location such as a flange where steam may leak, and a humidity sensor is arranged at the other end of the detection tube, and the humidity sensor detects the leaked vapor. I have to.
  • Patent Document 2 Japanese Utility Model Publication No. 64-000593
  • Patent Document 2 describes a steam leaked by a humidity sensor provided in a heat insulation wall, surrounding a valve that is likely to cause a steam leak with a heat insulation wall, and installing a steam intake casing on the heat insulation wall.
  • heat absorbing fillers such as glass fiber for lowering the temperature of high-temperature steam and shielding plates that cause a labyrinth effect are attached, and only the steam that passes through these comes in contact with the humidity sensor.
  • this conventional example has a problem that only a steam leak from a specific place such as a valve in which steam leaks can be detected, and a steam leak from an unspecified place of a long steam pipe cannot be detected.
  • the heat resistance of the humidity sensor is not high, and for the purpose of lowering the steam temperature, an endothermic filler and a shielding plate are put in the sensor casing, but when harmful substances such as acidic mist and slurry adhere to these.
  • the steam leak itself cannot be detected. In this case, not only the early detection of the steam leakage but also the abnormality of the steam leakage itself may not be detected.
  • Patent Documents 1 and 2 can only detect steam leakage from a specific limited location, they cannot cope with steam leakage from breakage occurring somewhere in a long pipe. There was a problem that steam leaks could not be detected early. For this reason, although it was necessary to immediately start the temperature lowering / lowering operation of the pressurized reaction vessel simultaneously with the occurrence of the ejection of the high-temperature and high-pressure steam due to the piping damage, such a rapid measure could not be taken. As a result, it was not possible to prepare carefully for the repair, and it was not possible to prepare a repair method that would minimize the repair time. Therefore, the problem that the repair took a long time and caused a great opportunity loss still remained.
  • a steam pipe breakage detecting device includes a steam pipe for sending steam, a detection pipe arranged so as to surround an outer periphery of the steam pipe, an outer peripheral surface of the steam pipe, and an inner part of the detection pipe It is characterized by comprising a steam detector in which a sensing part for detecting the presence or absence of ejected steam is faced in a steam storage space between the peripheral surface.
  • the steam pipe breakage detecting device of the second invention is characterized in that, in the first invention, the detection pipe is closed at both ends by end plates.
  • the steam pipe breakage detecting device is characterized in that, in the second aspect of the invention, the steam detector is a temperature detector having a sensing portion facing the steam storage space.
  • a steam pipe breakage detecting device is characterized in that, in the third invention, the steam pipe is a pipe in which a harmful substance may be mixed in the steam.
  • the steam pipe breakage detecting device is characterized in that, in the fourth aspect, the steam pipe is a steam recovery pipe of a flash vessel.
  • the first invention even if the steam pipe is damaged and its level is small, if the steam spouts from the damaged part, the steam enters the steam storage space surrounded by the steam pipe and the detection pipe outside the steam pipe. By detecting this with a steam detector, it is possible to recognize the occurrence of damage at an early stage of damage. For this reason, since damage to the steam pipe can be repaired slightly, it becomes unnecessary to stop the front and rear devices of the steam pipe, and the operating rate of the equipment is improved.
  • the second invention when even a small amount of steam is ejected from the damaged part of the steam pipe, the temperature of the steam storage space in which the steam is retained rises in a short time. Sensitive detection of damage to steam piping.
  • the steam and the harmful substance are sent into the steam pipe, but even if the harmful substance enters the steam storage space, it does not flow at high speed even if the steam storage space is filled. Therefore, it does not damage the sensor or cause malfunction.
  • harmful substances are not released from the detection pipe, work safety is ensured and the external environment is not contaminated.
  • harmful substances such as strongly acidic mist and slurry droplets are sent to the steam recovery pipe of the flash vessel. Even if these harmful substances enter the vapor storage space, the vapor storage space is filled. Even if it does, it will not flow at high speed, so it will not damage the sensor or cause it to malfunction.
  • harmful substances are not released from the detection pipe, work safety is ensured and the external environment is not contaminated.
  • FIG. 2 is a schematic side view of the steam pipe breakage detection device shown in FIG. 1. It is explanatory drawing of the hydrometallurgical installation with which the steam piping breakage detection apparatus of this invention is applied.
  • 1 is a steam pipe for sending steam
  • 2 is a detection pipe for detecting jetted steam.
  • the steam pipe 1 is a pipe used for supplying and collecting steam in various plants.
  • the diameter, inner thickness, and material of the steam pipe 1 may be arbitrarily selected according to the purpose of use. If high-temperature and high-pressure steam is passed, the pipe has a high corrosion resistance and a thick wall. Good. Even if the steam pipe 1 is small during operation, if the steam pipe 1 is damaged, the steam inside may be ejected to the outside.
  • the detection pipe 2 is arranged so as to surround the outer periphery of the steam pipe 1. Normally, both the pipes 1 and 2 are arranged concentrically, but it is not necessary to restrict them concentrically. Although the diameter, inner thickness, and material of the detection pipe 2 can be arbitrarily selected, it is not always necessary to use a pipe as strong as the steam pipe 1 because steam does not always pass therethrough. However, pipes of the same material and thickness can be used. It suffices if a space is formed between the outer peripheral surface of the steam pipe 1 and the inner peripheral surface of the detection pipe 2, and this space is used as a steam storage space 3 used for detecting the temperature by stopping the steam generated by the damage to the steam pipe 1. The
  • the length of the detection pipe 2 may be arbitrary, and may be provided over the entire length of the steam pipe 1, or may be limited to a portion where damage is likely to occur. As shown in FIG. 2, both ends of the detection pipe 2 are closed by fixing the end face plate 22 to the cylindrical body 21. When configured in such a closed space, the steam spouted from the damaged part of the steam pipe 1 fills the steam storage space 3 which is a closed space and raises the temperature of the space in a short time. Or the abnormal situation of a vapor
  • the end face plate 22 of the detection pipe 2 is preferably removable from the cylinder 21.
  • a means for fixing the flange 23 to the cylinder 21 and bolting the end face plate 22 to the flange 23 can be exemplified.
  • the present invention is not limited to this, and any means can be used without any particular limitation. Can do.
  • the end face plate 22 when the end face plate 22 is removable, the end face plate 22 can be removed during repair work, and the steam pipe 1 can be easily removed and the detection pipe 2 can be easily removed.
  • the detection pipe 2 Since the detection pipe 2 is arranged so as to surround the steam pipe 1, a support column of the detection pipe 2 may be necessary to secure the steam storage space 3. If the detection pipe 2 shown in FIG. 2 is short, it can be supported only by the end face plate 22, but if it is long, a support column inserted between the detection pipe 2 and the steam pipe 1 may be provided. It is preferable to use ceramics, bricks, or the like that are heat resistant and have little heat conduction or the like. In the case of using a metal material, it is preferable to reduce the heat flow from the steam pipe 1 to the detection pipe 2 by making the column cross-sectional area as small as possible.
  • the size of the steam storage space 3 is arbitrarily selected from the viewpoint of making it easy to grasp the temperature change in the steam storage space 3 or from the viewpoint of making the size easy to work when replacing the damaged steam pipe 1. Can do. For example, when the steam temperature is high, the volume of the steam storage space 3 may be increased, and when the steam temperature is low, the volume may be decreased. When the volume of the vapor storage space 3 is large, secondary failure does not occur in the temperature detector 4 and the like which will be described later even if high-temperature and high-pressure steam is filled. When the volume of the vapor storage space 3 is small, even if the vapor is relatively low temperature or the amount of ejection is small, it is easy to reliably detect a temperature rise. In addition, the length and shape of the steam storage space 3 may be appropriately selected in consideration of installation conditions such as the length and thickness of the steam pipe 1 and the degree of curvature of the steam pipe 1.
  • a steam detector for detecting the ejected steam is disposed.
  • the temperature detector 4 is used as a vapor detector.
  • the temperature detector 4 is attached to the detection pipe 2 with an appropriate attachment, for example, a flanged pipe 5.
  • the sensing unit 4 a of the temperature detector 4 is disposed so as to face the vapor storage space 3 from the detection pipe 2.
  • the sensing unit 4a is separate from the temperature detector body, and may be a separate type connected by a lead wire or the like, or may be an integrated type in which a long rod-like sensing unit 4a is coupled to the temperature detector body. Good.
  • the structure of the temperature detector 4 is not particularly limited, as long as the temperature in the steam storage space 3 can be measured during steady operation (when steam does not leak). If the temperature detector 4 uses a thermocouple such as a thermocouple that detects temperature information electrically, and the steam leak is monitored by this electrical signal, automatic steam leak monitoring is possible. This is preferable because it becomes possible.
  • the temperature detector 4 is attached to the long detection pipe 2 at one place, but two or more places may be attached, and the number of attachments is arbitrary.
  • repair method a) Remove the detection pipe 2, then remove the damaged steam pipe 1 and replace it with a new steam pipe 1.
  • repair is performed by a method such as applying a repair member or the like to the damaged portion and welding.
  • various methods can be arbitrarily employed.
  • the slurry S is heated and pressurized in the slurry preheating tank 11 and is pushed into the pressurized reaction vessel 13 by the pump 12, and at the same time, sulfuric acid, reaction air (oxygen-enriched air), etc. (not shown) are added, The metal is leached to the liquid phase side of the slurry, and then the temperature is lowered and reduced by the flash vessel 14 and transferred to the neutralization step 15 and the like in the subsequent step. When the temperature of the flash vessel 14 is lowered, the water vapor corresponding to the pressure drop is generated quite violently.
  • a steam recovery pipe A is provided for recovering the steam and sending it to the slurry preheating tank 11 for recovery.
  • Nickel oxide ore slurry S Raw ore after mining (for example, nickel grade is about 1.0 to 2.0%) is formed into slurry S having a predetermined particle size and concentration by multi-stage classification (screening) and crushing stage. It is collected and transferred to the next leaching process.
  • Slurry preheating tank 11 The ore slurry S is heated while the moisture of the ore slurry S is well maintained by directly contacting the ore slurry S and the water vapor that are counterflowing.
  • Flash vessel 14 The flash vessel 14 includes a cylindrical body with a bottom, and a slurry charging inlet and a steam discharge port are provided in a ceiling portion where the upper portion of the barrel is closed, and a slurry discharge port is provided in the trunk portion.
  • a slurry charging pipe for charging the leached slurry S that has been lowered to a predetermined temperature and a predetermined pressure into the flash vessel 14 is connected to the slurry charging inlet, and a flash vessel 14 is connected to the slurry outlet.
  • a slurry discharge pipe for discharging the slurry charged in the inside is connected, and a steam recovery pipe A for recovering the steam generated in the flash vessel 14 as the slurry is charged is connected to the steam outlet.
  • the steam pipe breakage detection device of the present invention is applied to the steam recovery pipe A shown in FIG.
  • the symbol I in the figure indicates the cross-sectional part of FIG.
  • the steam pipe breakage detecting device having a double pipe structure shown in FIGS. 1 and 2 may be applied over the entire length of the steam recovery pipe A shown in FIG. It may be selected and applied.
  • the steam pipe breakage detecting device starts repair work for the steam pipe 1 as soon as a steam leak is detected. At that time, the steam pipe breakage detecting apparatus has the following four effects. (1) Early detection of steam pipe 1 breakage is possible. When the steam pipe 1 is damaged, the steam leaks into the steam storage space 3 and the temperature rises abruptly. This rapid temperature change is detected, so that the steam pipe 1 can be detected early.
  • Example 1 is a steam pipe breakage detecting device having the configuration shown in FIGS. 1 and 2 installed in the steam recovery pipe A shown in FIG.
  • the indicated value of the temperature detector 4 had been stable with a fluctuation range of ⁇ 3 ° C until then, but suddenly rose about 15 ° C. Since no damage was found in the detection pipe 2 and no steam eruption was found, after repair preparation of the steam recovery pipe A and a meeting between the repair procedures, the pressurized reaction vessel 13 was cooled and depressurized to break the steam pipe. 1 repair was done. The cause of damage was perforation due to thinning, so it was replaced with a spare part that had been prepared. At this time, the operation was stopped for 24 hours.
  • Example 1 since the steam recovery pipe damage was detected at an early stage, the operation was stopped according to the procedure prepared in advance and repaired. For this reason, the repair process proceeded smoothly and the operation stoppage time was minimized.
  • Comparative Examples 1, 2, and 3 after the steam pipe damage was detected, the operation of the pressurized reaction vessel 13 must be stopped immediately, so that it was not possible to take time to prepare for repair. Worked. For this reason, the repair time could not be shortened.
  • Example 1 did not cause such inconvenience.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

L'invention concerne un dispositif de détection de rupture de tuyau de vapeur permettant de détecter à un stade précoce des dommages sur un tuyau de vapeur à travers lequel de la vapeur contaminée par une substance dangereuse s'écoule. Le dispositif de détection de rupture de tuyau de vapeur comprend un tuyau de vapeur (1) à travers lequel la vapeur s'écoule, une conduite de détection (2) disposée de façon à entourer la circonférence extérieure du tuyau de vapeur (1), et un capteur de température (4) comprenant une unité de détection (4a) pour détecter la présence ou l'absence de vapeur s'échappant, l'unité de détection (4a) faisant face à un espace de retenue de vapeur (3) entre la surface circonférentielle extérieure du tuyau (1) et la surface circonférentielle intérieure de la conduite de détection (2). Même un faible endommagement du tuyau de vapeur (1) fait que de la vapeur pénètre dans l'espace de retenue de vapeur (3) entouré par le tuyau de vapeur (1) et la conduite de détection (2) à l'extérieur du tuyau de vapeur (1) quand la vapeur s'échappe de la partie endommagée. En étant détectée par le détecteur de température (4), l'apparition du dommage peut être reconnue à un stade précoce. Par conséquent, le tuyau de vapeur (1) peut être réparé tandis que les dommages sur le tuyau de vapeur (1) sont encore réduits, et en conséquence, il n'est pas nécessaire d'arrêter des appareils disposés en aval et en amont du tuyau de vapeur (1), ce qui résulte en une augmentation du taux de fonctionnement d'équipement.
PCT/JP2015/064912 2014-07-08 2015-05-25 Dispositif de détection de rupture de tuyau de vapeur WO2016006335A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PH12016500901A PH12016500901A1 (en) 2014-07-08 2016-05-16 Vapor pipe fracture detection device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014140189A JP5871033B2 (ja) 2014-07-08 2014-07-08 蒸気配管破損検知装置
JP2014-140189 2014-07-08

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WO2016006335A1 true WO2016006335A1 (fr) 2016-01-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114235301A (zh) * 2021-11-09 2022-03-25 上海贤日测控科技有限公司 气密性检测系统及其方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2742185C2 (ru) * 2016-06-06 2021-02-03 Хексагон Текнолоджи Ас Система и способ прогнозирования предстоящего повреждения сосуда под давлением

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Publication number Priority date Publication date Assignee Title
JPS5548631A (en) * 1978-10-05 1980-04-07 Toshiba Corp Leak detector for vapor of nuclear reactor system
JPH05248982A (ja) * 1992-03-10 1993-09-28 Nkk Corp 熱媒輸送用配管の熱媒漏洩検知方法
US6112580A (en) * 1996-02-10 2000-09-05 Michael Hesky Gmbh Device for detecting leaks in pipelines
WO2013105454A1 (fr) * 2012-01-13 2013-07-18 住友金属鉱山株式会社 Ballon de flashing et son procédé de fonctionnement

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
JPH0560721A (ja) * 1991-09-04 1993-03-12 Hitachi Ltd 高温高圧水用Ａｇ／Ａｇイオン電極型参照電極及びそれを用いたプラント制御システム
US8797021B2 (en) * 2011-02-14 2014-08-05 Ge-Hitachi Nuclear Energy Americas Llc Electrochemical corrosion potential probe assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5548631A (en) * 1978-10-05 1980-04-07 Toshiba Corp Leak detector for vapor of nuclear reactor system
JPH05248982A (ja) * 1992-03-10 1993-09-28 Nkk Corp 熱媒輸送用配管の熱媒漏洩検知方法
US6112580A (en) * 1996-02-10 2000-09-05 Michael Hesky Gmbh Device for detecting leaks in pipelines
WO2013105454A1 (fr) * 2012-01-13 2013-07-18 住友金属鉱山株式会社 Ballon de flashing et son procédé de fonctionnement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114235301A (zh) * 2021-11-09 2022-03-25 上海贤日测控科技有限公司 气密性检测系统及其方法
CN114235301B (zh) * 2021-11-09 2024-05-03 上海贤日测控科技有限公司 气密性检测系统及其方法

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Publication number Publication date
PH12016500901B1 (en) 2016-06-20
JP5871033B2 (ja) 2016-03-01
JP2016017820A (ja) 2016-02-01
PH12016500901A1 (en) 2016-06-20

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