JP2003242571A - Equipment using hydrogen gas and method for detecting hydrogen gas leakage - Google Patents
Equipment using hydrogen gas and method for detecting hydrogen gas leakageInfo
- Publication number
- JP2003242571A JP2003242571A JP2002040596A JP2002040596A JP2003242571A JP 2003242571 A JP2003242571 A JP 2003242571A JP 2002040596 A JP2002040596 A JP 2002040596A JP 2002040596 A JP2002040596 A JP 2002040596A JP 2003242571 A JP2003242571 A JP 2003242571A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen gas
- temperature measuring
- temperature
- equipment
- leakage
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Landscapes
- Examining Or Testing Airtightness (AREA)
- Hydrogen, Water And Hydrids (AREA)
- Emergency Alarm Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水素ガスの製造機
器、消費機器、貯蔵容器、配管などの水素ガスを内蔵す
る水素ガス内蔵機器から水素ガスが漏洩し、この水素ガ
スが燃焼した場合において、水素ガスが漏洩したことを
検知できる水素ガス使用設備および水素ガス漏洩の検知
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case where hydrogen gas leaks from hydrogen gas built-in equipment, such as hydrogen gas manufacturing equipment, consumer equipment, storage containers, and piping, which contains hydrogen gas and the hydrogen gas burns. The present invention relates to a facility using hydrogen gas capable of detecting leakage of hydrogen gas and a method for detecting hydrogen gas leakage.
【０００２】[0002]
【従来の技術】従来から、水素ガスの製造機器、消費機
器、貯蔵容器、配管などの水素ガス内蔵機器を有する水
素ガス使用設備において、水素ガス漏洩を検知するに
は、接触燃焼式、熱伝導式、半導体式、光干渉式などの
水素ガス漏洩検知センサが用いられている。これらの水
素ガス漏洩検知センサは、いずれも水素ガスの特性を利
用したものである。例えば、接触燃焼式水素ガス漏洩検
知センサでは、水素ガスが可燃性であることを利用して
いる。すなわち、可燃性ガスを着火させる着火源が設け
られた燃焼雰囲気に水素ガス内蔵機器近傍の空気を導入
するとともに、空気に水素ガスが含まれている場合に、
水素ガスが燃焼して生じた温度上昇を温度計測器で検知
することにより水素ガスの漏洩を検知する。また、熱伝
導式水素ガス漏洩検知センサでは、水素ガスと空気との
熱伝導率の違いを利用しており、水素ガス内蔵機器近傍
の空気の熱伝導率を測定することにより水素ガス漏洩を
検知する。また、半導体式水素ガス漏洩検知センサで
は、半導体表面に水素ガスが吸着した場合に電気伝導度
が変化することを利用しており、水素ガス内蔵機器近傍
の空気を半導体に接触させるとともに、半導体の電気伝
導度を測定することにより水素ガス漏洩を検知する。ま
た、光干渉式水素ガス漏洩検知センサでは、水素ガスと
空気との屈折率の違いを利用しており、水素ガス近傍の
空気の屈折率を測定することにより水素ガス漏洩を検知
する。2. Description of the Related Art Conventionally, in a facility using hydrogen gas that has hydrogen gas manufacturing equipment, consumer equipment, storage containers, pipes, and other equipment with built-in hydrogen gas, to detect hydrogen gas leakage, contact combustion, heat conduction A hydrogen gas leak detection sensor of the formula, semiconductor type, optical interference type, or the like is used. All of these hydrogen gas leak detection sensors utilize the characteristics of hydrogen gas. For example, a catalytic combustion type hydrogen gas leakage detection sensor utilizes the fact that hydrogen gas is combustible. That is, while introducing air in the vicinity of a device containing a hydrogen gas into a combustion atmosphere provided with an ignition source for igniting a flammable gas, when the air contains hydrogen gas,
By detecting the temperature rise caused by the combustion of hydrogen gas with a temperature measuring device, the leakage of hydrogen gas is detected. In addition, the thermal conductivity hydrogen gas leak detection sensor utilizes the difference in thermal conductivity between hydrogen gas and air. Hydrogen gas leak is detected by measuring the thermal conductivity of the air near the equipment containing hydrogen gas. To do. In addition, the semiconductor hydrogen gas leak detection sensor utilizes the fact that the electric conductivity changes when hydrogen gas is adsorbed on the semiconductor surface. Hydrogen gas leakage is detected by measuring electrical conductivity. Further, the optical interference type hydrogen gas leak detection sensor utilizes the difference in refractive index between hydrogen gas and air, and detects hydrogen gas leak by measuring the refractive index of air in the vicinity of hydrogen gas.
【０００３】[0003]
【発明が解決しようとする課題】ところが、水素ガス
は、漏洩した際に容易に着火するという性質を有してい
る。着火の原因は、水素ガスと水素ガスの漏洩口との摩
擦によって生じる静電気であると考えられている。この
ように、漏洩した水素ガスが着火してしまった場合に
は、水素ガスは燃焼して水となる。そのため、もはや燃
焼が起こらないので、接触燃焼式水素ガス漏洩検知セン
サでは漏洩した水素ガスを検知できなかった。また、水
素ガスが燃焼して生成した水蒸気による熱伝導率、電気
伝導度、屈折率の変化を測定しようとしても、空気中に
は水蒸気が含まれており、特に梅雨時などにおいては高
湿度になるので、生成した水蒸気によって水素ガス漏洩
を検知することは困難であった。このように、漏洩した
水素ガスが燃焼した場合には、従来の水素ガス漏洩検知
センサでは漏洩を検知できないため、直ちに漏洩を発見
できず、設備損失などの損害が大きくなる可能性があっ
た。本発明は、前記事情を鑑みて行われたものであり、
漏洩した水素ガスが燃焼した場合でも確実にかつ直ちに
検知できる水素ガス使用設備および水素ガス漏洩の検知
方法を提供することを目的とする。However, hydrogen gas has the property of easily igniting when leaking. The cause of ignition is considered to be static electricity generated by friction between hydrogen gas and a leak port of hydrogen gas. In this way, when the leaked hydrogen gas is ignited, the hydrogen gas burns into water. Therefore, since combustion no longer occurs, the leaked hydrogen gas could not be detected by the catalytic combustion type hydrogen gas leak detection sensor. In addition, even if you try to measure changes in thermal conductivity, electrical conductivity, and refractive index due to water vapor generated by combustion of hydrogen gas, the water vapor is contained in the air, and especially in the rainy season, high humidity occurs. Therefore, it is difficult to detect the hydrogen gas leakage by the generated water vapor. In this way, when the leaked hydrogen gas burns, the conventional hydrogen gas leak detection sensor cannot detect the leak, so that the leak cannot be found immediately, and there is a possibility that damage such as equipment loss will increase. The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a facility for using hydrogen gas and a method for detecting hydrogen gas leakage, which can reliably and immediately detect leaked hydrogen gas even if it burns.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、漏洩した
水素ガスが着火した場合の現象について鋭意研究したと
ころ、着火した際の火炎の状態、その周囲の温度変化に
ついての知見が得られ、この知見に基づいて検討した結
果、本発明に到達した。すなわち、本発明の水素ガス使
用設備は、水素ガスを内蔵する水素ガス内蔵機器近傍
に、単基または複数の温度計測器を有する温度測定手段
が設置されたことを特徴としている。本発明の水素ガス
使用設備では、各温度計測器は０．５〜２ｍの略等間隔
で設けられていることが好ましい。また、前記温度計測
器が設置された位置の、前記水素ガス内蔵機器に対して
反対側の位置に熱反射板を設けることが好ましい。水素
ガスの漏洩しやすい方向が特定できる場合には、その方
向に温度計測器を設置することがより好ましい。また、
水素ガスの漏洩を検知した際に、前記温度測定手段から
発せられた検知信号を受けて、前記水素ガス内蔵機器へ
の水素供給を遮断する緊急遮断弁を設けることができ
る。Means for Solving the Problems The inventors of the present invention have earnestly studied the phenomenon when leaked hydrogen gas is ignited, and as a result, the inventors have obtained knowledge about the state of flame upon ignition and the temperature change around it. As a result of examination based on this finding, the present invention has been reached. That is, the facility for using hydrogen gas according to the present invention is characterized in that the temperature measuring means having a single or a plurality of temperature measuring devices is installed in the vicinity of the hydrogen gas-containing device that contains hydrogen gas. In the facility for using hydrogen gas of the present invention, it is preferable that the temperature measuring devices are provided at substantially equal intervals of 0.5 to 2 m. Further, it is preferable to provide a heat reflection plate at a position opposite to the hydrogen gas built-in device at a position where the temperature measuring device is installed. When the direction in which hydrogen gas easily leaks can be specified, it is more preferable to install the temperature measuring device in that direction. Also,
An emergency shutoff valve may be provided for shutting off the hydrogen supply to the hydrogen gas-containing device upon receipt of a detection signal emitted from the temperature measuring means when a leak of hydrogen gas is detected.
【０００５】また、本発明の水素ガス漏洩の検知方法
は、水素ガスを内蔵する水素ガス内蔵機器から漏洩した
水素ガスが着火した場合に検知する水素ガス漏洩の検知
方法であって、前記水素ガス内蔵機器近傍の温度を、単
基または複数の温度計測器を有する温度測定手段によっ
て測定して、水素ガス漏洩を検知することを特徴として
いる。その際、前記水素ガス内蔵機器近傍の温度が６０
℃以上で、水素ガスが漏洩したと判断することが好まし
い。The hydrogen gas leak detection method of the present invention is a hydrogen gas leak detection method for detecting when hydrogen gas leaked from a hydrogen gas built-in device containing hydrogen gas is ignited. It is characterized in that the temperature near the built-in equipment is measured by a temperature measuring means having a single or a plurality of temperature measuring devices to detect hydrogen gas leakage. At that time, the temperature in the vicinity of the device containing hydrogen gas is 60
It is preferable to judge that the hydrogen gas has leaked at a temperature of not less than ° C.
【０００６】[0006]
【発明の実施の形態】本発明の一実施形態例を、図１お
よび図２を参照しながら説明する。この実施形態例で
は、水素ガス使用設備１０において、水素ガス内蔵機器
である水素ガス移送管１１の継手１２上方の近傍に、温
度測定手段１３が設置されている。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. In this embodiment, in the hydrogen gas using facility 10, the temperature measuring means 13 is installed near the joint 12 of the hydrogen gas transfer pipe 11 which is a hydrogen gas built-in device.
【０００７】温度測定手段１３は、図２に示すように、
複数の温度計測器１４，１４，１４・・・を有してい
る。複数の温度計測器１４，１４，１４・・・を有して
いることにより、漏洩した水素ガスの燃焼による発熱を
検知できる。つまり、水素ガスは通常高圧力で使用され
ており、水素ガスが漏洩した場合には、直線的な噴出流
状で漏洩する。そのため、水素ガスの火炎も直線的とな
り、温度の上昇が局部的となる。温度計測器が１つの場
合では、局部的な温度の上昇を検知できない可能性があ
るが、温度計測器１４が複数設けられていると、そのう
ちの少なくとも１つで確実に燃焼を検知でき、結果的に
水素漏洩を検知できる。温度計測器は、図示例のような
平面配置である必要はなく、例えば、水素ガス内蔵機器
の形状に合わせて配置してもよい。温度計測器の配置の
形状、設置場所、設置方向については、水素ガス内蔵機
器を取り扱う技術者が、水素ガスが漏洩しやすい方向を
予測し、それに基づいて決定することができる。The temperature measuring means 13, as shown in FIG.
It has a plurality of temperature measuring devices 14, 14, 14 ... By having a plurality of temperature measuring devices 14, 14, 14, ..., It is possible to detect heat generation due to combustion of leaked hydrogen gas. That is, hydrogen gas is usually used at a high pressure, and when hydrogen gas leaks, it leaks in the form of a straight jet flow. Therefore, the flame of hydrogen gas is also linear, and the temperature rise is local. If there is only one temperature measuring device, it may not be possible to detect a local rise in temperature, but if multiple temperature measuring devices 14 are provided, at least one of them can reliably detect combustion, resulting in Hydrogen leak can be detected. The temperature measuring device does not need to be arranged in a plane as in the illustrated example, and may be arranged according to the shape of the hydrogen gas-containing device, for example. Regarding the arrangement shape, the installation location, and the installation direction of the temperature measuring device, an engineer who handles the hydrogen gas built-in device can predict the direction in which the hydrogen gas is likely to leak and make a decision based on it.
【０００８】なお、水素ガスが燃焼した際の火炎は直線
的になると述べたが、火炎長さは、水素ガスの圧力をＰ
（ｋｇｆ／ｃｍ2 ）、漏洩箇所の孔径をＤ（ｍ）、火炎
長さをＬとすると、Ｌ＝２２２．８×Ｐ0.384 ×Ｄで算
出される。例えば、孔径を１ｍｍ、水素ガス圧力を２０
０ｋｇｆ／ｃｍ2 の場合には、火炎長さは約１．７ｍと
求められる。また、水素ガス圧力が１０ｋｇｆ／ｃｍ2
の場合には、火炎長さは約０．５ｍ以下と求められる。Although it has been stated that the flame when hydrogen gas burns becomes linear, the flame length is P
(Kgf / cm 2 ), D (m) is the hole diameter at the leak point, and L is the flame length, and L = 222.8 × P 0.384 × D. For example, the hole diameter is 1 mm, the hydrogen gas pressure is 20
In the case of 0 kgf / cm 2 , the flame length is required to be about 1.7 m. Also, the hydrogen gas pressure is 10 kgf / cm 2
In this case, the flame length is required to be about 0.5 m or less.
【０００９】各温度計測器１４は０．５〜２ｍの略等間
隔で設けられていることが好ましい。各温度計測器１４
を０．５〜２ｍの略等間隔で設けると、温度計測器１４
が効率的に配置されるので、水素ガス漏洩をさらに確実
に検知できる。It is preferable that the temperature measuring devices 14 are provided at substantially equal intervals of 0.5 to 2 m. Each temperature measuring device 14
When the sensors are provided at substantially equal intervals of 0.5 to 2 m, the temperature measuring device 14
Are efficiently arranged, so that the leak of hydrogen gas can be detected more reliably.
【００１０】温度測定手段１３は水素ガス移送管１１の
近傍に設けられる。ここで、「近傍」とは火炎の温度を
検知できる範囲のことであり、具体的には０．３〜５ｍ
のことである。したがって、温度測定手段１３は水素ガ
ス移送管１１の周囲、０．３〜５ｍに設置されることが
好ましい。その距離が０．３ｍ未満であると、漏洩した
水素が着火しないことがあり、温度計測器１４によって
水素漏洩を検知できない場合がある。一方、５ｍを超え
ると、温度計測器１４の設置位置と火炎の位置がずれて
温度計測器１４によって水素漏洩を検知できないことが
ある。The temperature measuring means 13 is provided near the hydrogen gas transfer pipe 11. Here, “near” means a range in which the temperature of the flame can be detected, specifically, 0.3 to 5 m.
That is. Therefore, the temperature measuring means 13 is preferably installed around the hydrogen gas transfer pipe 11 at 0.3 to 5 m. When the distance is less than 0.3 m, the leaked hydrogen may not ignite, and the hydrogen leak may not be detected by the temperature measuring device 14. On the other hand, if it exceeds 5 m, the installation position of the temperature measuring device 14 and the position of the flame may be displaced, and the temperature measuring device 14 may not be able to detect hydrogen leakage.
【００１１】温度測定手段１３は、漏洩検知の確実性の
点からは水素ガス移送管１１のすべての箇所の近傍に設
けられることが好ましいが、その場合、設置コストが高
くなるので、図１に示すように、配管、他の機器、計器
類等との継手１２部分などの水素漏洩の可能性が高い箇
所の近傍に設けることが好ましい。水素漏洩の可能性が
高い箇所の近傍に設けることにより、温度測定手段１３
の設置箇所を少なくできるので、コストを低くできる。
また、温度測定手段１３は、漏洩検知の確実性の点から
いえば、水素ガス移送管１１の周囲全てに設けることが
好ましいが、この場合、コストが高くなるので、少なく
とも水素ガス移送管１１上方に設けることが好ましい。
温度測定手段１３を少なくとも水素ガス移送管１１上方
に設けると、火炎が上昇した場合でも火炎の温度を容易
に検知できる。また、温度測定手段１３の設置スペース
を容易に確保できる。なお、水素ガスが漏洩し着火した
ときの火炎の方向は、必ずしも上方のみとは限らないの
で、温度測定手段１３を水素ガス移送管１１の上方に設
置する場合には、水素ガス移送管１１を挟んで反対側
で、作業の邪魔にならない付近に、熱を反射させる熱反
射板１７を設置することが望ましい。熱反射板１７を設
置すると、火炎の輻射熱が温度計測器１４により測定さ
れるので、水素ガス漏洩の検知の確実性がさらに高くな
る。さらに、熱反射板１７を設置する位置は、温度測定
手段１３より水素ガス移送管１１までの距離が短いこと
が好ましいが、熱反射板１７を大きくすることで、熱反
射板１７と水素ガス移送管１１との距離を長くすること
もできる。The temperature measuring means 13 is preferably provided in the vicinity of all the locations of the hydrogen gas transfer pipe 11 from the viewpoint of reliability of leak detection, but in that case, the installation cost becomes high, and therefore the temperature measuring means 13 is shown in FIG. As shown in the drawing, it is preferable to provide it in the vicinity of a place where there is a high possibility of hydrogen leakage, such as the joint 12 portion with piping, other equipment, instruments and the like. The temperature measuring means 13 is provided near the location where hydrogen is likely to leak.
Since the number of installation places can be reduced, the cost can be reduced.
Further, the temperature measuring means 13 is preferably provided all around the hydrogen gas transfer pipe 11 from the viewpoint of reliability of leak detection, but in this case, since the cost becomes high, at least above the hydrogen gas transfer pipe 11. It is preferable to provide it.
If the temperature measuring means 13 is provided at least above the hydrogen gas transfer pipe 11, the temperature of the flame can be easily detected even if the flame rises. Further, the installation space for the temperature measuring means 13 can be easily secured. Note that the direction of the flame when hydrogen gas leaks and ignites is not necessarily upward, so when the temperature measuring means 13 is installed above the hydrogen gas transfer pipe 11, the hydrogen gas transfer pipe 11 is It is desirable to install a heat reflection plate 17 that reflects heat on the opposite side of the sandwich and near the place where it does not interfere with the work. When the heat reflection plate 17 is installed, the radiant heat of the flame is measured by the temperature measuring device 14, so the reliability of hydrogen gas leakage detection is further enhanced. Further, it is preferable that the heat reflection plate 17 is installed at a short distance from the temperature measuring means 13 to the hydrogen gas transfer pipe 11. However, by enlarging the heat reflection plate 17, the heat reflection plate 17 and the hydrogen gas transfer pipe 11 are transferred. The distance from the tube 11 can be increased.
【００１２】温度測定手段１３に用いられる温度計測器
１４としては特に制限されないが、例えば、測温抵抗
体、熱電対などが挙げられる。また、温度検知型の火災
報知器を用いることもできる。ただし、漏洩した水素の
火炎が直接温度計測器１４に触れた場合には、温度計測
器が一瞬のうちに溶断してしまうことがあるので、溶断
された場合においても漏洩検知信号を発することができ
る温度計測器でなければならない。このような温度計測
器の選定は、計測技術に精通している技術者であれば容
易に選定できる。The temperature measuring device 14 used in the temperature measuring means 13 is not particularly limited, but examples thereof include a resistance temperature detector and a thermocouple. Also, a temperature detection type fire alarm can be used. However, if the leaked hydrogen flame directly touches the temperature measuring device 14, the temperature measuring device may be melted in an instant, so that even if it is melted, a leak detection signal may be issued. It must be a temperature measuring instrument capable. Such a temperature measuring device can be easily selected by an engineer who is familiar with the measurement technology.
【００１３】温度測定手段１３には警報装置１５、緊急
遮断弁１６などが接続されることが好ましい。温度測定
手段１３に警報装置１５、緊急遮断弁１６などが接続さ
れると、温度測定手段１３の少なくとも１つの温度計測
器１４が発熱を検知したときに、警報を発したり、温度
測定手段１３から発せられた検知信号を受けて、水素ガ
ス移送管１１への水素ガスの供給を遮断したりできるの
で、より迅速な対応が可能である。An alarm device 15, an emergency shutoff valve 16 and the like are preferably connected to the temperature measuring means 13. When the alarm device 15, the emergency shutoff valve 16 and the like are connected to the temperature measuring means 13, when at least one temperature measuring device 14 of the temperature measuring means 13 detects heat generation, an alarm is issued or the temperature measuring means 13 outputs the alarm. Since the supply of the hydrogen gas to the hydrogen gas transfer pipe 11 can be interrupted by receiving the detection signal issued, it is possible to take a quicker response.
【００１４】本実施形態例の水素ガス使用設備では、温
度測定手段１３以外に、従来から使用されている水素ガ
ス漏洩検知センサをさらに設置することが好ましい。従
来から使用されている水素ガス漏洩検知センサをさらに
設置すると、水素ガスが着火しない場合でも、水素ガス
の漏洩を検知できる。したがって、さらに確実に水素ガ
ス漏洩を検知できる。In the facility for using hydrogen gas according to the present embodiment, it is preferable to install a hydrogen gas leak detection sensor which has been conventionally used, in addition to the temperature measuring means 13. If a hydrogen gas leak detection sensor that has been used conventionally is further installed, the leak of hydrogen gas can be detected even when the hydrogen gas does not ignite. Therefore, the hydrogen gas leakage can be detected more reliably.
【００１５】また、上述した常温付近で使用する水素ガ
ス使用設備１０などを用いた水素ガス漏洩の検知方法で
は、水素ガス内蔵機器近傍の温度が６０℃以上で、水素
ガスが漏洩したと判断することが好ましい。水素ガス内
蔵機器近傍の温度が６０℃未満であると、夏季において
は直射日光により局部的に温度上昇することがあるの
で、この温度上昇により水素ガスが漏洩したものと誤っ
て警報を発してしまうことがある。また、水素ガス漏洩
は、急激な温度変化により判断することもできる。具体
的には、測定温度の微分値を演算し、その微分値がある
値以上になったときに、水素ガスが漏洩したと判断する
こともできる。Further, in the above-mentioned method of detecting hydrogen gas leakage using the hydrogen gas using equipment 10 used near room temperature, it is judged that the hydrogen gas has leaked when the temperature in the vicinity of the hydrogen gas-containing device is 60 ° C. or higher. It is preferable. If the temperature in the vicinity of the equipment containing hydrogen gas is less than 60 ° C, the temperature may rise locally due to direct sunlight in the summer, so an alarm is erroneously issued as hydrogen gas leaking due to this temperature rise. Sometimes. Also, hydrogen gas leakage can be judged by a rapid temperature change. Specifically, it is also possible to calculate the differential value of the measured temperature and determine that the hydrogen gas has leaked when the differential value exceeds a certain value.
【００１６】上述した実施形態例の水素ガス使用設備１
０にあっては、水素ガス内蔵機器である水素ガス移送管
１１近傍に、複数の温度計測器１４，１４，１４・・・
を有する温度測定手段１３を設置して、水素ガス移送管
１１近傍の温度を測定している。そして、温度計測器１
４の少なくとも１つが、水素ガスが燃焼した際の発熱を
検知することにより、水素ガス漏洩を検知できるので、
漏洩した水素ガスが燃焼した場合であっても、水素ガス
漏洩を確実かつ直ちに検知できる。その結果、迅速に対
応できるので、設備損失などの損害を小さくできる。ま
た、各温度計測器１４が０．５〜２ｍの略等間隔で設け
られていると、効率的に配置されるので、さらに確実に
水素ガス漏洩を検知できる。また、上述した実施形態例
の水素ガス漏洩の検知方法では、温度測定手段１３によ
って水素ガス移送管１１近傍の温度を測定し、水素ガス
が燃焼した際の発熱を検知することにより、水素ガス漏
洩を検知できる。その際、水素ガス内蔵機器近傍の温度
が６０℃以上で、水素ガスが漏洩したと判断すると、気
候などの条件に影響を受けないので、水素ガス漏洩をよ
り確実に検知できる。Equipment 1 for using hydrogen gas according to the above-described embodiment
In the case of 0, a plurality of temperature measuring devices 14, 14, 14, ... In the vicinity of the hydrogen gas transfer pipe 11 which is a device containing hydrogen gas.
The temperature measuring means 13 having the above is installed to measure the temperature in the vicinity of the hydrogen gas transfer pipe 11. And the temperature measuring instrument 1
Since at least one of 4 can detect hydrogen gas leakage by detecting heat generation when hydrogen gas burns,
Even if the leaked hydrogen gas burns, the hydrogen gas leak can be detected reliably and immediately. As a result, quick response is possible, and damage such as equipment loss can be reduced. Further, when the temperature measuring devices 14 are provided at substantially equal intervals of 0.5 to 2 m, the temperature measuring devices 14 are efficiently arranged, so that hydrogen gas leakage can be detected more reliably. Further, in the hydrogen gas leakage detection method of the above-described embodiment, the temperature measuring means 13 measures the temperature in the vicinity of the hydrogen gas transfer pipe 11 to detect the heat generated when the hydrogen gas burns, thereby detecting the hydrogen gas leakage. Can be detected. At this time, if it is determined that the hydrogen gas has leaked when the temperature in the vicinity of the device containing hydrogen gas is 60 ° C. or higher, the hydrogen gas leak can be more reliably detected because it is not affected by conditions such as climate.
【００１７】[0017]
【実施例】（実施例１）実施例１における水素ガス使用
設備は水素ガス受入設備３１であり、図３に示すよう
に、建物３２内に、水素ガス内蔵機器として水素ガス運
搬トレーラ３３と水素ガス移送管３４とが設置されてい
る。そして、水素ガス運搬トレーラ３３に水素ガス移送
管３４を接続して水素ガス消費機器３５に水素ガスを受
け入れている。このような水素ガス受入設備３１におい
て、水素ガス運搬トレーラ３３と水素ガス移送管３４と
は接続または切り離しの回数が多い上に、水素ガス移送
管３４には、減圧弁３６や圧力計３７等の付属品が設置
されており、水素ガス漏洩の可能性が高くなっている。
そこで、この水素ガス受入設備３１では、水素ガス運搬
トレーラ３３と水素ガス移送管３４との接続部分の上方
に温度測定手段３８を設置した。そして、温度測定手段
３８には、警報装置３９を接続した。実施例１における
温度測定手段３８では、図２に示すように、１６本の熱
電対からなる温度計測器１４を１．５ｍ間隔で設置し
た。そして、警報設定値を８０℃とし、熱電対のいずれ
か１つが８０℃以上の温度を検知したときに、水素ガス
が漏洩したと判断し、警報装置３９から警報を発するよ
うにした。(Embodiment 1) The equipment using hydrogen gas in the embodiment 1 is a hydrogen gas receiving equipment 31, and as shown in FIG. A gas transfer pipe 34 is installed. A hydrogen gas transfer pipe 34 is connected to the hydrogen gas transport trailer 33 to receive the hydrogen gas in the hydrogen gas consuming device 35. In such a hydrogen gas receiving facility 31, the hydrogen gas transport trailer 33 and the hydrogen gas transfer pipe 34 are frequently connected or disconnected, and the hydrogen gas transfer pipe 34 includes a pressure reducing valve 36, a pressure gauge 37, or the like. The accessory is installed, and the possibility of hydrogen gas leakage is high.
Therefore, in the hydrogen gas receiving equipment 31, the temperature measuring means 38 is installed above the connecting portion between the hydrogen gas transport trailer 33 and the hydrogen gas transfer pipe 34. An alarm device 39 was connected to the temperature measuring means 38. In the temperature measuring means 38 of the first embodiment, as shown in FIG. 2, the temperature measuring devices 14 each consisting of 16 thermocouples were installed at intervals of 1.5 m. Then, the alarm set value is set to 80 ° C., and when any one of the thermocouples detects a temperature of 80 ° C. or higher, it is determined that the hydrogen gas has leaked, and the alarm device 39 issues an alarm.
【００１８】このように、本実施例では、水素ガス受入
設備３１に温度測定手段３８を設置しており、水素ガス
が漏洩し、燃焼した場合には、それを確実かつ直ちに検
知し、警報を発することができるので、水素ガス消費機
器３５の運転停止、水素ガス運搬トレーラ３３との遮断
などの対応が迅速にできるようになった。As described above, in this embodiment, the temperature measuring means 38 is installed in the hydrogen gas receiving equipment 31, and when the hydrogen gas leaks and burns, it is detected reliably and immediately and an alarm is issued. Since it can be emitted, it becomes possible to promptly take measures such as stopping the operation of the hydrogen gas consuming device 35 and shutting off the hydrogen gas transport trailer 33.
【００１９】（実施例２）本実施例は、温度測定手段が
複数の温度検知型火災報知器とした以外は実施例１と同
様にした。この場合においても、水素ガスが漏洩し、燃
焼すると、火災報知器が熱を検知して警報を発するの
で、水素ガス漏洩を直ちに検知し、迅速に対応できるよ
うになった。
（実施例３）本実施例は、水素ガス移送管に接続されて
いる減圧弁の直下の床に、鉄製の熱反射板を設置した以
外は実施例１と同様にした。本実施例において、水素ガ
スが漏洩し燃焼した場合には、温度上昇を温度計測器で
より迅速に検知できたので、より迅速に警報を発し、緊
急遮断弁を閉止させることができた。(Second Embodiment) This embodiment is the same as the first embodiment except that the temperature measuring means is a plurality of temperature detection type fire alarms. Even in this case, when the hydrogen gas leaks and burns, the fire alarm detects the heat and gives an alarm, so that the hydrogen gas leak can be immediately detected and swiftly dealt with. (Example 3) This example was the same as Example 1 except that a heat reflecting plate made of iron was installed on the floor immediately below the pressure reducing valve connected to the hydrogen gas transfer pipe. In the present embodiment, when the hydrogen gas leaked and burned, the temperature rise could be detected more quickly by the temperature measuring instrument, so the alarm could be issued more quickly and the emergency shutoff valve could be closed.
【００２０】[0020]
【発明の効果】本願請求項１、本願請求項２または本願
請求項６によれば、漏洩した水素ガスが燃焼した場合で
あっても、水素ガス漏洩を確実かつ直ちに検知できる。
その結果、迅速に対応できるので、設備損失などの損害
を小さくできる。また、本願請求項３によれば、温度計
測器が効率的に設置されているので、さらに確実に水素
ガス漏洩を検知できる。また、本願請求項４によれば、
温度上昇をより確実に検知できるので、水素漏洩検知の
確実性がさらに向上する。また、本願請求項５によれ
ば、水素ガスが漏洩した場合に水素ガス燃焼量を減らす
ことができる。また、本願請求項７によれば、気候など
の条件に影響を受けないので、さらに確実に水素ガス漏
洩を検知できる。According to claim 1, claim 2 or claim 6 of the present application, even if the leaked hydrogen gas burns, the hydrogen gas leakage can be detected reliably and immediately.
As a result, quick response is possible, and damage such as equipment loss can be reduced. Further, according to claim 3 of the present application, since the temperature measuring device is efficiently installed, the hydrogen gas leakage can be detected more reliably. According to claim 4 of the present application,
Since the temperature rise can be detected more reliably, the reliability of hydrogen leak detection is further improved. Further, according to claim 5 of the present application, the hydrogen gas combustion amount can be reduced when the hydrogen gas leaks. Further, according to claim 7 of the present application, hydrogen gas leakage can be detected more reliably because it is not affected by conditions such as climate.
【図１】 本発明の水素ガス使用設備の一実施形態例を
模式的に示す図である。FIG. 1 is a diagram schematically showing an embodiment of a hydrogen gas using facility of the present invention.
【図２】 本発明の水素ガス使用設備に設置される温度
測定手段の一実施形態例を示す平面図である。FIG. 2 is a plan view showing an embodiment of a temperature measuring means installed in the hydrogen gas using facility of the present invention.
【図３】 実施例１の水素ガス受入設備を模式的に示す
図であって、（ａ）は正面図、（ｂ）は側面図である。3A and 3B are diagrams schematically showing the hydrogen gas receiving equipment of Example 1, wherein FIG. 3A is a front view and FIG. 3B is a side view.
１０ 水素ガス使用設備 １１，３４ 水素ガス移送管（水素ガス内蔵機器） １３ 温度測定手段 １４ 温度計測器 １７ 熱反射板 ３１ 水素ガス受入設備（水素ガス使用設備） ３３ 水素ガス運搬トレーラ（水素ガス内蔵機器） 10 Hydrogen gas equipment 11,34 Hydrogen gas transfer pipe (equipped with hydrogen gas) 13 Temperature measuring means 14 Temperature measuring instrument 17 heat reflector 31 Hydrogen gas receiving equipment (equipment using hydrogen gas) 33 Hydrogen gas transport trailer (equipped with hydrogen gas)
フロントページの続き (72)発明者 金井 恂 東京都港区芝浦三丁目17番12号 昭和エン ジニアリング株式会社内 (72)発明者 田中 守也 東京都港区芝浦三丁目17番12号 昭和エン ジニアリング株式会社内 Ｆターム(参考） 2G067 AA48 BB22 CC04 DD08 EE12 4G040 AB01 AB03 5C086 AA02 BA20 CA30 CB01 DA40Continued front page (72) Inventor Atsushi Kanai Showa En, 3-17-12 Shibaura, Minato-ku, Tokyo Inside Genialing Co., Ltd. (72) Inventor Moriya Tanaka Showa En, 3-17-12 Shibaura, Minato-ku, Tokyo Inside Genialing Co., Ltd. F term (reference) 2G067 AA48 BB22 CC04 DD08 EE12 4G040 AB01 AB03 5C086 AA02 BA20 CA30 CB01 DA40
Claims (7)
傍に、温度計測器を有する温度測定手段が設置されたこ
とを特徴とする水素ガス使用設備。1. A facility for using hydrogen gas, characterized in that a temperature measuring means having a temperature measuring device is installed in the vicinity of a hydrogen gas built-in device containing hydrogen gas.
を特徴とする請求項１に記載の水素ガス使用設備。2. The facility for using hydrogen gas according to claim 1, wherein a plurality of the temperature measuring devices are provided.
で設けられていることを特徴とする請求項２に記載の水
素ガス使用設備。3. The facility for using hydrogen gas according to claim 2, wherein the temperature measuring devices are provided at substantially equal intervals of 0.5 to 2 m.
記水素ガス内蔵機器に対して反対側の位置に熱反射板が
設けられたことを特徴とする請求項１〜３のいずれかに
記載の水素ガス使用設備。4. The heat reflecting plate is provided at a position opposite to the hydrogen gas-containing device at a position where the temperature measuring device is installed. Equipment for using hydrogen gas as described.
度測定手段から発せられた検知信号を受けて、前記水素
ガス内蔵機器への水素供給を遮断する緊急遮断弁が設け
られたことを特徴とする請求項１〜４のいずれかに記載
の水素ガス使用設備。5. An emergency shutoff valve is provided which shuts off hydrogen supply to the equipment containing hydrogen gas when a leak of hydrogen gas is detected and the detection signal is sent from the temperature measuring means. The facility for using hydrogen gas according to claim 1, wherein the facility uses hydrogen gas.
ら漏洩した水素ガスが着火した場合に検知する水素ガス
漏洩の検知方法であって、前記水素ガス内蔵機器近傍の
温度を、単基または複数の温度計測器を有する温度測定
手段によって測定して、水素ガス漏洩を検知することを
特徴とする水素ガス漏洩の検知方法。6. A method of detecting hydrogen gas leakage, which is detected when hydrogen gas leaking from a hydrogen gas built-in device containing hydrogen gas is ignited, wherein the temperature in the vicinity of the hydrogen gas built-in device is set to a single unit or a plurality of units. A method for detecting hydrogen gas leakage, which comprises detecting the hydrogen gas leakage by measuring the temperature with a temperature measuring means having the temperature measuring device.
℃以上で、水素ガスが漏洩したと判断することを特徴と
する請求項６に記載の水素ガス漏洩の検知方法。7. The temperature in the vicinity of the device containing hydrogen gas is 60.
The method for detecting hydrogen gas leakage according to claim 6, wherein it is determined that the hydrogen gas has leaked at a temperature of not less than ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002040596A JP2003242571A (en) | 2002-02-18 | 2002-02-18 | Equipment using hydrogen gas and method for detecting hydrogen gas leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002040596A JP2003242571A (en) | 2002-02-18 | 2002-02-18 | Equipment using hydrogen gas and method for detecting hydrogen gas leakage |
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| Publication Number | Publication Date |
|---|---|
| JP2003242571A true JP2003242571A (en) | 2003-08-29 |
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ID=27781302
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|---|---|---|---|
| JP2002040596A Pending JP2003242571A (en) | 2002-02-18 | 2002-02-18 | Equipment using hydrogen gas and method for detecting hydrogen gas leakage |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009063135A (en) * | 2007-09-07 | 2009-03-26 | Showa Shell Sekiyu Kk | Installation structure of metal piping for cryogenic fluid |
| JP2011116579A (en) * | 2009-12-02 | 2011-06-16 | Panasonic Corp | Hydrogen production apparatus |
| JP2016138865A (en) * | 2015-01-29 | 2016-08-04 | 株式会社東芝 | Gas leak detection device |
| CN113970070A (en) * | 2021-09-28 | 2022-01-25 | 北京格睿能源科技有限公司 | Liquid hydrogen and cryogenic gas hydrogen leak detection and location method and device |
| JP7329892B1 (en) | 2023-02-21 | 2023-08-21 | 株式会社ハイドロネクスト | Hydrogen utilization system |
-
2002
- 2002-02-18 JP JP2002040596A patent/JP2003242571A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009063135A (en) * | 2007-09-07 | 2009-03-26 | Showa Shell Sekiyu Kk | Installation structure of metal piping for cryogenic fluid |
| JP2011116579A (en) * | 2009-12-02 | 2011-06-16 | Panasonic Corp | Hydrogen production apparatus |
| JP2016138865A (en) * | 2015-01-29 | 2016-08-04 | 株式会社東芝 | Gas leak detection device |
| CN113970070A (en) * | 2021-09-28 | 2022-01-25 | 北京格睿能源科技有限公司 | Liquid hydrogen and cryogenic gas hydrogen leak detection and location method and device |
| JP7329892B1 (en) | 2023-02-21 | 2023-08-21 | 株式会社ハイドロネクスト | Hydrogen utilization system |
| JP2024118972A (en) * | 2023-02-21 | 2024-09-02 | 株式会社ハイドロネクスト | Hydrogen Utilization System |
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