JP2002372193A - Liquefied gas supplying device - Google Patents
Liquefied gas supplying deviceInfo
- Publication number
- JP2002372193A JP2002372193A JP2001181274A JP2001181274A JP2002372193A JP 2002372193 A JP2002372193 A JP 2002372193A JP 2001181274 A JP2001181274 A JP 2001181274A JP 2001181274 A JP2001181274 A JP 2001181274A JP 2002372193 A JP2002372193 A JP 2002372193A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- liquefied gas
- pressure
- gaseous
- container
- 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
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Pipeline Systems (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液化ガス供給装置
に係り、特に、通常の液化ガスの供給圧力よりも高い圧
力で気相の液化ガスを供給する液化ガス供給装置に関す
る。The present invention relates to a liquefied gas supply apparatus, and more particularly to a liquefied gas supply apparatus for supplying a gaseous liquefied gas at a pressure higher than a normal liquefied gas supply pressure.
【０００２】[0002]
【従来の技術】通常の液化ガスの供給圧力、例えば２.
５〜３.５ｋＰａ程度の圧力で気相の液化ガスを供給す
る液化ガス供給装置では、液化ガスを収容する容器と、
この容器内の気相部に連通するガス管路とを備えたもの
が用いられている。そして、屋外または屋内に設置され
た容器に収容された液相の液化ガスは、容器周囲の外気
からの熱によって気化され、生じた気相の液化ガスは、
容器内の気相部に連通するガス管路を介して気相の液化
ガスを使用する機器や装置類へ供給される。しかし、こ
のような通常の液化ガスの供給圧力で気相の液化ガスを
供給する液化ガス供給装置では、容器周囲の外気からの
熱によって液相の液化ガスを気化して気相の液化ガスを
供給するため、通常の液化ガスの供給圧力よりも高い圧
力、例えば０.３ＭＰａ以上といったような供給圧力を
維持して気相の液化ガスを供給することは難しい。2. Description of the Related Art Normal liquefied gas supply pressure, for example, 2.
In a liquefied gas supply device for supplying a gaseous liquefied gas at a pressure of about 5 to 3.5 kPa, a container for containing the liquefied gas;
A gas line having a gas pipe communicating with the gas phase in the container is used. The liquid liquefied gas contained in a container installed outdoors or indoors is vaporized by heat from outside air around the container, and the generated gas liquefied gas is
The gaseous liquefied gas is supplied to equipment and devices using a gaseous liquefied gas via a gas pipe communicating with a gaseous phase part in the container. However, in such a liquefied gas supply device that supplies a gaseous liquefied gas at a normal liquefied gas supply pressure, the liquid liquefied gas is vaporized by heat from the outside air around the container to convert the gaseous liquefied gas. Therefore, it is difficult to supply the gaseous liquefied gas while maintaining the supply pressure higher than the normal supply pressure of the liquefied gas, for example, 0.3 MPa or more.
【０００３】これに対して、本願の発明者らは、通常の
液化ガスの供給圧力よりも高い圧力で気相の液化ガスを
供給するための液化ガス供給装置として、液化ガスが収
容される容器、この容器内の気相部に連通するガス管
路、このガス管路に設けられてこのガス管路内を通流す
るガスの圧力を調整する圧力調整手段、この容器内また
はガス管路に流入した気相の液化ガスの圧力を検出する
圧力検出手段、容器内の液化ガスを加熱する液化ガス加
熱手段、そして、容器の温度または液化ガス加熱手段の
温度を検出する温度検出手段などを備えた構成の液化ガ
ス供給装置を考えている。On the other hand, the inventors of the present application have developed a container for accommodating a liquefied gas as a liquefied gas supply device for supplying a gaseous liquefied gas at a pressure higher than a normal liquefied gas supply pressure. A gas line communicating with the gas phase in the container, pressure adjusting means provided in the gas line to adjust the pressure of the gas flowing through the gas line, Pressure detecting means for detecting the pressure of the inflowing gaseous liquefied gas, liquefied gas heating means for heating the liquefied gas in the vessel, and temperature detecting means for detecting the temperature of the vessel or the temperature of the liquefied gas heating means A liquefied gas supply device having a different configuration is considered.
【０００４】このような液化ガス供給装置では、容器内
の圧力、またはガス管路の気相の液化ガスの流れに対し
て圧力調整手段よりも上流側の圧力に応じて容器内の液
化ガスを加熱することで気相の液化ガスを要求される圧
力以上に維持している。そして、要求される圧力以上と
なった気相の液化ガスを圧力調整手段によって要求され
る圧力に調整することで、通常の液化ガスの供給圧力よ
りも高い圧力を要求する機器や装置類などに、その要求
する圧力で気相の液化ガスを供給している。また、容器
の温度、または液化ガス加熱手段の容器の加熱温度を検
知する温度検出手段で検出した温度が設定した温度以上
になると、液化ガス加熱手段による容器内の液化ガスの
加熱を停止することにより、容器内の液化ガスの温度が
必要以上に上昇し過ぎるのを防いでいる。In such a liquefied gas supply device, the liquefied gas in the container is supplied in accordance with the pressure in the container or the pressure upstream of the pressure adjusting means with respect to the flow of the gaseous liquefied gas in the gas line. The heating keeps the gaseous liquefied gas above the required pressure. Then, by adjusting the gaseous liquefied gas that has become equal to or higher than the required pressure to the pressure required by the pressure adjusting means, equipment and devices that require a higher pressure than the normal liquefied gas supply pressure can be used. Liquefied gas is supplied at the required pressure. Further, when the temperature of the container or the temperature detected by the temperature detecting means for detecting the heating temperature of the container of the liquefied gas heating means becomes equal to or higher than the set temperature, the heating of the liquefied gas in the container by the liquefied gas heating means may be stopped. This prevents the temperature of the liquefied gas in the container from rising excessively.
【０００５】[0005]
【発明が解決しようとする課題】ところで、ガスを供給
する機器では、一般的に、ガス管路などからのガス漏れ
といった異常の発生に対処するため、ガス漏れの発生を
検知してガスの供給を遮断する機器などが設けられてい
る。しかし、現在入手可能なガス漏れを検出する機器
は、通常の液化ガスの供給圧力に対応したものであるた
め、本願の発明者らが考えているような通常の液化ガス
の供給圧力よりも高い圧力で気相の液化ガスを供給する
液化ガス供給装置に用いることができない。さらに、本
願の発明者らが考えている液化ガス供給装置では、熱源
機や加熱器などからなる液化ガス加熱手段により容器を
加熱することで供給する気相の液化ガスを通常よりも高
い圧力にしているが、この液化ガス加熱手段の不具合な
どにより要求される圧力で気相の液化ガスを供給できな
くなるといった異常を検知することも保安の面から必要
になる。このように、本願の発明者らが考えている液化
ガス供給装置では、通常の液化ガスの供給圧力で気相の
液化ガスを供給する液化ガス供給装置とは異なる対応に
より安全性を向上する必要がある。By the way, in a gas supply apparatus, generally, in order to cope with the occurrence of an abnormality such as gas leakage from a gas pipeline or the like, the gas supply is detected by detecting the occurrence of the gas leakage. There is provided a device for shutting off the air. However, currently available devices for detecting gas leaks are those corresponding to the supply pressure of ordinary liquefied gas, and therefore are higher than the supply pressure of ordinary liquefied gas as considered by the present inventors. It cannot be used for a liquefied gas supply device that supplies a gaseous liquefied gas at a pressure. Furthermore, in the liquefied gas supply device considered by the inventors of the present application, the gaseous liquefied gas supplied by heating the container by liquefied gas heating means including a heat source device and a heater is set to a pressure higher than usual. However, from the viewpoint of security, it is also necessary to detect an abnormality such that the gaseous liquefied gas cannot be supplied at a required pressure due to a malfunction of the liquefied gas heating means. As described above, in the liquefied gas supply device considered by the inventors of the present application, it is necessary to improve safety by responding differently from a liquefied gas supply device that supplies a gaseous liquefied gas at a normal liquefied gas supply pressure. There is.
【０００６】本発明の課題は、液化ガス供給装置の安全
性を向上することにある。An object of the present invention is to improve the safety of a liquefied gas supply device.
【０００７】[0007]
【課題を解決するための手段】本発明の液化ガス供給装
置は、液化ガスが収容される容器と、この容器内の気相
部に連通するガス管路と、このガス管路に設けられてこ
のガス管路内のガスの通流を遮断する遮断弁と、このガ
ス管路に設けられてこのガス管路内を通流する気相の液
化ガスの圧力を調整する圧力調整手段と、容器内または
ガス管路の圧力調整手段よりも気相の液化ガスの流れに
対して上流側の圧力を検出する第１の圧力検出手段と、
容器内の液化ガスを加熱する液化ガス加熱手段と、容器
の温度または液化ガス加熱手段の容器の加熱温度を検出
する温度検出手段とを備え、第１の圧力検出手段で検出
した圧力に応じて液化ガス加熱手段が放出する熱量を調
整し、温度検出手段で検出した温度が設定された温度以
上になると液化ガス加熱手段による容器内の液化ガスの
加熱を停止する液化ガス供給装置であり、ガス管路に、
このガス管路の圧力調整手段よりも気相の液化ガスの流
れに対して下流側の圧力を検出する第２の圧力検出手段
を設け、この第２の圧力検出手段で検出した圧力に応じ
て遮断弁を閉じる構成とすることにより上記課題を解決
する。A liquefied gas supply device according to the present invention comprises a container for containing a liquefied gas, a gas line communicating with a gas phase in the container, and a gas line provided in the gas line. A shutoff valve for shutting off the flow of gas in the gas line, pressure adjusting means provided in the gas line to adjust the pressure of a gaseous liquefied gas flowing through the gas line, and a container First pressure detecting means for detecting the pressure on the upstream side with respect to the flow of the liquefied gas in the gas phase than the pressure adjusting means in the inside or the gas line;
Liquefied gas heating means for heating the liquefied gas in the vessel, and temperature detection means for detecting the temperature of the vessel or the heating temperature of the vessel of the liquefied gas heating means, according to the pressure detected by the first pressure detection means A liquefied gas supply device that adjusts the amount of heat released by the liquefied gas heating means, and stops heating of the liquefied gas in the container by the liquefied gas heating means when the temperature detected by the temperature detection means becomes equal to or higher than a set temperature. In the pipeline,
A second pressure detecting means for detecting a pressure on the downstream side of the flow of the liquefied gas in a gaseous phase rather than the pressure adjusting means in the gas line is provided, and a second pressure detecting means is provided in accordance with the pressure detected by the second pressure detecting means. The above problem is solved by closing the shutoff valve.
【０００８】このような構成とすることにより、ガス管
路の圧力調整手段よりも気相の液化ガスの流れに対して
下流側の圧力やその圧力の変化などから、ガス管路以降
の気相の液化ガスの流路からのガス漏れや、液化ガス加
熱手段などの不具合によって容器の加熱ができなくなる
などの異常を検知して遮断弁を閉じ、気相の液化ガスの
通流を遮断することができるため、液化ガス供給装置の
安全性を向上できる。[0008] With this configuration, the pressure of the gaseous liquefied gas on the downstream side with respect to the flow of the gaseous liquefied gas or a change in the pressure of the gaseous liquefied gas rather than the pressure control means of the gas line may cause the gaseous phase after the gas line to change. Detecting abnormalities such as gas leakage from the liquefied gas flow path or the failure of the liquefied gas heating means to heat the container, closing the shutoff valve and shutting off the flow of gaseous liquefied gas Therefore, the safety of the liquefied gas supply device can be improved.
【０００９】ここで、気相の液化ガスの供給を行ってい
るとき、第２の圧力検出手段で検出した圧力が設定され
た圧力以下になると遮断弁を閉じる構成とする。このよ
うな構成とすれば、ガス漏れや液化ガス加熱手段などの
不具合などの異常によって生じるガス管路内の圧力低下
によってガス管路内の圧力が設定された圧力以下になる
と、遮断弁を閉じてガス管路以降への気相の液化ガスの
通流を止めることができるため、液化ガス供給装置の安
全性を向上できる。Here, when the gaseous liquefied gas is supplied, the shut-off valve is closed when the pressure detected by the second pressure detecting means falls below the set pressure. With such a configuration, when the pressure in the gas pipeline becomes equal to or lower than the set pressure due to a pressure drop in the gas pipeline caused by an abnormality such as a gas leak or a malfunction of the liquefied gas heating means, the shutoff valve is closed. As a result, the flow of the gaseous liquefied gas to the gas pipeline and the downstream can be stopped, so that the safety of the liquefied gas supply device can be improved.
【００１０】さらに、遮断弁が圧力調整手段よりも気相
の液化ガスの流れに対して上流側に設けられており、気
相の液化ガスの供給を開始するとき、遮断弁が閉じられ
ガス管路に気相の液化ガスが封入された状態で第２の圧
力検知手段によってガス管路の圧力調整手段よりも気相
の液化ガスの流れに対して下流側の圧力の変化を検出
し、この検出した圧力の変化からガス漏れを検知し、ガ
ス漏れが検知されなかったときに遮断弁を開く構成とす
る。このような構成とすれば、ガス管路以降の気相の液
化ガスの流路でガス漏れが起こっているか否かを検知
し、ガス漏れが起こっていなければ遮断弁を開けて気相
の液化ガスを通流するようにできるため、液化ガス供給
装置の安全性をより向上できる。Further, a shut-off valve is provided upstream of the flow of the gaseous liquefied gas with respect to the pressure adjusting means, and when the supply of the gaseous liquefied gas is started, the shut-off valve is closed and the gas pipe is closed. In a state in which the gaseous liquefied gas is sealed in the passage, the second pressure detecting means detects a change in pressure on the downstream side of the flow of the gaseous liquefied gas from the pressure adjusting means in the gas line, Gas leakage is detected from the detected change in pressure, and the shut-off valve is opened when gas leakage is not detected. With this configuration, it is detected whether or not gas leakage has occurred in the gaseous liquefied gas flow path after the gas pipeline, and if no gas leakage has occurred, the shut-off valve is opened and the gaseous liquefaction is performed. Since the gas can be passed, the safety of the liquefied gas supply device can be further improved.
【００１１】また、容器の揺れを感知する感震器を有
し、この感震器が設定された震度以上の揺れを感知する
と遮断弁を閉じる構成とすれば、ガス管路などが破損す
るような震度の地震が発生した場合にガスの通流を遮断
できるので、さらに安全性を向上できるので好ましい。[0011] Further, if a seismic sensor for detecting the shake of the container is provided, and the seismic sensor is configured to close the shut-off valve when the shake is detected to be equal to or greater than the set seismic intensity, the gas pipeline and the like may be damaged. This is preferable because the flow of gas can be cut off when an earthquake with a large seismic intensity occurs, so that safety can be further improved.
【００１２】ところで、ガス管路以降の気相の液化ガス
の流路でガス漏れが発生するとガス管路内の気相の液化
ガスの流量は、ガス漏れがない場合に比べて大きなもの
となる。そこで、液化ガス供給装置の安全性を向上する
上で、ガス管路に設定した流量以上の気相の液化ガスが
流れるとガス管路内の気相の液化ガスの通流を遮断する
ガス放出防止器を設けることが考えられる。しかし、通
常の液化ガスの供給圧力よりも高い圧力で気相の液化ガ
スを供給する液化ガス供給装置では、気相の液化ガスの
供給を開始する前、容器内の圧力と遮断弁よりも下流側
のガス管路内の圧力との差が大きく、気相の液化ガスの
供給を開始するために従来の液化ガス供給装置のような
開閉２段動作で遮断弁を開にすると、ガス放出防止器に
設定した流量以上で気相の液化ガスが瞬時に流れてしま
い、ガス放出防止器が誤動作して気相の液化ガスの通流
を遮断してしまう場合がある。When a gas leak occurs in the gaseous liquefied gas flow path after the gas pipe, the flow rate of the gaseous liquefied gas in the gas pipe becomes larger than that in the case where there is no gas leak. . Therefore, in order to improve the safety of the liquefied gas supply device, when the gaseous liquefied gas flows at a flow rate equal to or higher than the flow rate set in the gas line, the gas discharge that shuts off the flow of the gaseous liquefied gas in the gas line. It is conceivable to provide a preventer. However, in a liquefied gas supply device that supplies gaseous liquefied gas at a pressure higher than the normal liquefied gas supply pressure, before starting the supply of gaseous liquefied gas, the pressure in the container and the downstream of the shutoff valve are reduced. When the shut-off valve is opened in a two-stage opening and closing operation like a conventional liquefied gas supply device to start the supply of gaseous liquefied gas, gas release is prevented. The gaseous liquefied gas may flow instantaneously at a flow rate equal to or higher than the flow rate set in the vessel, and the gas release preventing device may malfunction to cut off the flow of the gaseous liquefied gas.
【００１３】これに対して、このガス管路の圧力調整手
段より気相の液化ガスの通流方向に対して下流側に設置
され、気相の液化ガスの流量が設定された流量以上にな
るとガス管路内の気相の液化ガスの通流を遮断するガス
放出防止器をガス管路に設け、液化ガスの供給を開始す
るとき、遮断弁を徐々に開いて行く構成とする。On the other hand, when the flow rate of the gaseous liquefied gas is equal to or higher than the set flow rate, the gaseous liquefied gas is installed downstream from the pressure adjusting means of the gas line with respect to the flowing direction of the gaseous liquefied gas. A gas release preventer for blocking the flow of gaseous liquefied gas in the gas pipeline is provided in the gas pipeline, and when the supply of the liquefied gas is started, the shutoff valve is gradually opened.
【００１４】このような構成とすれば、ガス放出防止器
を設けて安全性を向上でき、さらに、遮断弁を徐々に開
して行くことで、液化ガスの供給を開始するときに気相
の液化ガスがガス放出防止器に設定された流量以上の流
量でガス管路内をを通流するの防ぎ、ガス放出防止器の
誤動作を防ぐことができる。With such a configuration, the safety can be improved by providing a gas release preventer, and further, by gradually opening the shut-off valve, the supply of the gaseous phase when the supply of the liquefied gas is started. It is possible to prevent the liquefied gas from flowing through the gas pipeline at a flow rate equal to or higher than the flow rate set in the gas release prevention device, and to prevent malfunction of the gas release prevention device.
【００１５】さらに、液化ガスを供給する機器または装
置の駆動及び停止に対応して遮断弁を開及び閉する構成
とすれば、液化ガスを供給する機器または装置類が停止
しているときにガス管路内に液化ガスが侵入するのを防
ぎ、再液化する液化ガスの量を低減できるので好まし
い。Further, if the shut-off valve is opened and closed in response to driving and stopping of the equipment or apparatus for supplying the liquefied gas, the gas or the equipment for supplying the liquefied gas is stopped when the equipment or the equipment for supplying the liquefied gas is stopped. It is preferable because the liquefied gas can be prevented from entering the pipe and the amount of the liquefied gas to be reliquefied can be reduced.
【００１６】[0016]
【発明の実施の形態】以下、本発明を適用してなる液化
ガス供給装置の一実施形態について図１を参照して説明
する。図１は、本発明を適用してなる液化ガス供給装置
の概略構成を示す模式図である。なお、本実施形態で
は、液化ガス供給装置がマイクロガスタービンのタービ
ン駆動用燃料として気相の液化ガスを供給する場合の構
成を一例として説明する。マイクロガスタービンは、従
来のレシプロエンジン型の発電機などに比べ、発電規模
に対する設備の大きさがコンパクトであり、また、燃焼
排ガス温度が高温であるため、排熱からの熱回収率を向
上できる。このようなマイクロガスタービンでは、通常
の液化ガスの燃焼を行う機器類に比べて高圧、例えば
０.３〜１.０ＭＰａの圧力を維持して液化ガスを供給す
る必要がある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a liquefied gas supply apparatus according to the present invention will be described below with reference to FIG. FIG. 1 is a schematic diagram showing a schematic configuration of a liquefied gas supply device to which the present invention is applied. In the present embodiment, a configuration in which the liquefied gas supply device supplies a gaseous liquefied gas as a turbine driving fuel of a micro gas turbine will be described as an example. Compared to conventional reciprocating engine-type generators, micro gas turbines have a compact facility for the scale of power generation, and the high temperature of the combustion exhaust gas means that the heat recovery rate from exhaust heat can be improved. . In such a micro gas turbine, it is necessary to supply a liquefied gas while maintaining a high pressure, for example, a pressure of 0.3 to 1.0 MPa, as compared with devices that perform normal liquefied gas combustion.
【００１７】本実施形態の本実施形態の液化ガス供給装
置は、図１に示すように、液化ガス、例えば液化石油ガ
ス（ＬＰＧ）や液化天然ガス（ＬＮＧ）などを収容して
貯蔵するための容器１、容器１内の図示していない気相
部に連通するガス管路３、容器１の底部に設置された加
熱器５、加熱器５に通流させる熱媒、例えば水を加熱す
るための熱源機７、加熱器５と熱源機７との間で熱媒を
循環させるための熱媒管路９ａ、９ｂ、熱媒管路９ａと
熱媒管路９ｂとをバイパスするバイパス管路９ｃ、液化
ガス供給装置の動作を制御する制御部１１などで構成さ
れている。As shown in FIG. 1, the liquefied gas supply device according to the present embodiment for storing and storing a liquefied gas such as liquefied petroleum gas (LPG) and liquefied natural gas (LNG). The container 1, a gas line 3 communicating with a gas phase portion (not shown) in the container 1, a heater 5 installed at the bottom of the container 1, and a heating medium flowing through the heater 5, for example, water Heat source device 7, a heat medium pipe 9a, 9b for circulating a heat medium between the heater 5 and the heat source device 7, and a bypass pipe 9c for bypassing the heat medium pipe 9a and the heat medium pipe 9b. And a control unit 11 for controlling the operation of the liquefied gas supply device.
【００１８】容器１は、略円筒状の容器を横向きにした
状態で脚部２により支持され、屋外に設置されたもので
あり、容器１の内部に収容されて図示していない液相部
となる液相の液化ガスは、容器１が外気から受けた熱に
より気化する。このため、容器１内の上部の図示してい
ない気相部には、気相の液化ガスが溜まった状態になっ
ている。容器１には、容器１内の図示していない気相部
の圧力を検出するため第１圧力検出器１３が、容器１内
の図示していない気相部に連通する圧力検出用管路１５
を介して設けられている。第１圧力検出器１３は、圧力
を表示するための圧力計１７を有している。圧力検出用
管路１５には、開閉弁１９が設けられている。The container 1 is supported by the legs 2 in a state where the substantially cylindrical container is turned sideways, and is installed outdoors. The container 1 is housed inside the container 1 and has a liquid phase portion (not shown). The liquefied gas in the liquid phase is vaporized by the heat received by the container 1 from the outside air. Therefore, a gaseous liquefied gas is stored in a gaseous part (not shown) in the upper part of the container 1. In the container 1, a first pressure detector 13 for detecting the pressure of a gas phase portion (not shown) in the container 1 is connected to a pressure detection line 15 communicating with a gas phase portion (not shown) in the container 1.
Is provided via The first pressure detector 13 has a pressure gauge 17 for displaying pressure. An on-off valve 19 is provided in the pressure detection pipe 15.
【００１９】ガス管路３は、一端が容器１内の図示して
いない気相部に挿入された状態で設置され、他端が気相
の液化ガスを燃料として用いるマイクロガスタービン２
０の図示していない燃焼部に連結されている。ガス管路
３の容器１からの出口部分には、開閉弁２１が設けられ
ている。ガス管路３の開閉弁２１よりも液化ガスの流れ
に対して下流側の部分では、熱源機７へ気相の液化ガス
を供給するための熱源機用ガス管路２３が分岐してい
る。ガス管路３の熱源機用ガス管路２３との分岐部より
も下流側の部分には、遮断弁２５、１次側圧力調整器２
７、ガス放出防止器２９、そして第２圧力検出器３１な
どが順次設けられている。The gas pipeline 3 is installed with one end inserted into a gas phase portion (not shown) in the container 1 and the other end is a micro gas turbine 2 using a gaseous liquefied gas as fuel.
0 is connected to a combustion section (not shown). An on-off valve 21 is provided at an outlet of the gas line 3 from the container 1. In a portion of the gas pipeline 3 downstream of the flow of the liquefied gas from the on-off valve 21, a gas pipeline 23 for the heat source unit for supplying the gaseous liquefied gas to the heat source unit 7 is branched. A shutoff valve 25 and a primary pressure regulator 2 are provided at a portion of the gas line 3 downstream of the branch from the heat source gas line 23.
7, a gas release preventing device 29, a second pressure detector 31, and the like are sequentially provided.
【００２０】遮断弁２５は、ガス管路３内の気相の液化
ガスの通流及び遮断を制御し、さらに、ガス管路３内を
通流する気相の液化ガスの流量を制御するため、モータ
の駆動により弁の開度を連続的に変えることができる構
成となっている。遮断弁２５は、マイクロガスタービン
２０の図示していない制御部と配線３３及び制御部１１
を介して電気的に接続されている。そして、マイクロガ
スタービン２０が駆動しているときには遮断弁２５が
開、マイクロガスタービン２０が停止ているときには遮
断弁２５が閉するように制御されている。これにより、
マイクロガスタービン２０が停止しているときに、容器
１から気相の液化ガスがガス管路１３に流入して気相の
液化ガスが再液化するのを防止し、ガス管路１３内での
液化ガスの再液化量を低減している。The shutoff valve 25 controls the flow and cutoff of the gaseous liquefied gas in the gas line 3 and further controls the flow rate of the gaseous liquefied gas flowing in the gas line 3. The opening degree of the valve can be continuously changed by driving the motor. The shut-off valve 25 is connected to a control unit (not shown) of the micro gas turbine 20 and the wiring 33 and the control unit 11.
Are electrically connected via When the micro gas turbine 20 is driven, the shut-off valve 25 is controlled to open, and when the micro gas turbine 20 is stopped, the shut-off valve 25 is controlled to close. This allows
When the micro gas turbine 20 is stopped, the gaseous liquefied gas from the container 1 is prevented from flowing into the gas line 13 to prevent the gaseous liquefied gas from being reliquefied. The amount of reliquefied liquefied gas is reduced.
【００２１】１次側圧力調整器２７は、ガス管路３内を
通流する気相の液化ガスの圧力をマイクロガスタービン
２０が要求する圧力、例えば０.３〜１.０ＭＰａに調整
するものである。ガス放出防止器２９は、ガス管路３や
マイクロガスタービン２０の液化ガスの流路など、つま
りガス管路３以降の気相の液化ガスの流路で多量のガス
の漏洩が生じ、ガス管路３内の気相の液化ガス流量が予
め設定された流量以上になった場合に、ガス管路３内の
気相の液化ガスの通流を遮断して液化ガスの漏洩つまり
液化ガスの外部への放出を防止するものである。第２圧
力検出器３１は、ガス管路３内の１次側圧力調整器２７
よりも下流側の部分の圧力を検出することでガスの漏洩
を検知するためのものである。第２圧力検出器３１は、
配線３３を介して制御部１１と電気的に接続されてい
る。また、第１圧力検出器１３も配線３３を介して制御
部１１と電気的に接続されている。The primary side pressure regulator 27 regulates the pressure of the gaseous liquefied gas flowing through the gas line 3 to the pressure required by the micro gas turbine 20, for example, 0.3 to 1.0 MPa. It is. The gas release preventing device 29 causes a large amount of gas leakage in the gas pipeline 3 and the flow path of the liquefied gas of the micro gas turbine 20, that is, in the flow path of the gaseous liquefied gas after the gas pipeline 3, When the flow rate of the gaseous liquefied gas in the passage 3 becomes equal to or higher than a preset flow rate, the flow of the gaseous liquefied gas in the gas pipe 3 is interrupted to leak the liquefied gas, that is, To prevent release to the public. The second pressure detector 31 is connected to the primary pressure regulator 27 in the gas line 3.
This is for detecting gas leakage by detecting the pressure of a portion on the downstream side. The second pressure detector 31
It is electrically connected to the control unit 11 via the wiring 33. The first pressure detector 13 is also electrically connected to the control unit 11 via the wiring 33.
【００２２】熱源機用ガス管路２３は、熱源機７の図示
していないバーナーに連結されている。熱源機用ガス管
路２３のガス管路３からの分岐部よりも下流側の部分に
は、熱源機用ガス放出防止器３５、単段圧力調整器３
７、そしてガスメータ３９などが順次設けられている。
熱源機用ガス放出防止器３５は、ガスの漏洩が生じて熱
源機用ガス管路２３内を通流する気相の液化ガスの流量
が設定された流量以上になった場合に、熱源機用ガス管
路２３内の液化ガスの通流を遮断して液化ガスの漏洩つ
まり液化ガスの外部への放出を防止するものである。単
段圧力調整器３７は、熱源機用ガス管路２３を通流する
気相の液化ガスの圧力を熱源機７が要求する圧力、例え
ば２.５〜３.５ｋＰａに調整するものである。The gas line 23 for the heat source unit is connected to a burner (not shown) of the heat source unit 7. In the portion of the gas line 23 for the heat source unit downstream of the branch from the gas line 3, the gas release prevention unit 35 for the heat source unit and the single-stage pressure regulator 3
7, and a gas meter 39 and the like are sequentially provided.
The gas release preventing device 35 for the heat source device is used for the heat source device when the gas leaks and the flow rate of the gaseous liquefied gas flowing through the gas line 23 for the heat source device becomes equal to or higher than the set flow rate. The flow of the liquefied gas in the gas pipeline 23 is blocked to prevent leakage of the liquefied gas, that is, discharge of the liquefied gas to the outside. The single-stage pressure regulator 37 regulates the pressure of the gas-phase liquefied gas flowing through the gas pipe 23 for the heat source device to the pressure required by the heat source device 7, for example, 2.5 to 3.5 kPa.
【００２３】熱源機７は、図示していない熱媒が通流す
る流路、この流路に設けられた熱媒タンク、ポンプ、流
路内の熱媒を加熱するバーナー、そしてポンプやバーナ
ーの動作を制御する制御部などを一体的に筐体に納めた
ものである。熱源機７の図示していない制御部は、制御
部１１と連携して作動するものであり、制御部７と配線
３３を介して電気的に接続されている。また、熱源機用
ガス管路２３のガスメータ３９よりも下流側の部分で、
通常の液化ガスの供給圧力で気相の液化ガスを使用する
熱源機７以外の燃焼機器４０に気相の液化ガスを供給す
るための燃焼機器用ガス管路４１が分岐している。The heat source unit 7 includes a flow path through which a heat medium (not shown) flows, a heat medium tank and a pump provided in the flow path, a burner for heating the heat medium in the flow path, and pumps and burners. A control unit for controlling the operation and the like are integrally housed in a housing. The control unit (not shown) of the heat source device 7 operates in cooperation with the control unit 11, and is electrically connected to the control unit 7 via the wiring 33. Further, in a portion of the gas pipe 23 for the heat source unit downstream of the gas meter 39,
A combustion equipment gas pipeline 41 for supplying a gaseous liquefied gas to a combustion equipment 40 other than the heat source device 7 that uses a gaseous liquefied gas at a normal liquefied gas supply pressure is branched.
【００２４】熱媒管路９ａは、一端が熱源機７の図示し
ていない熱媒が通流する流路に、他端が加熱器５内の熱
媒の流路４２に連結されており、熱媒管路９ａには、熱
源機７で加熱された熱媒、例えば水などが通流する。熱
媒管路９ｂは、一端が加熱器５内の熱媒の流路４２に、
他端が熱源機７の図示していない熱媒が通流する流路に
連結されており、熱媒管路９ｂには、加熱器５で熱を放
出した熱媒が通流する。熱媒管路９ａの熱源機７からの
熱媒の出口側部分と、熱媒管路９ｂの熱源機７への熱媒
の入口側部分との間にバイパス管路９ｃが設けられてい
る。バイパス管路９ｃには、バイパス管路９ｃへの熱媒
の通流及び遮断を行うことで加熱器５へ通流させる熱媒
の量を調整する熱媒量調整弁４３が設けられている。熱
媒量調整弁４３は、制御部１１と配線３３を介して電気
的に接続されている。なお、バイパス管路９ｃと熱媒量
調整弁４３は、配管抵抗が熱媒管路９ａよりも少ないも
のを用いている。The heat medium pipe 9a has one end connected to a flow path through which a heat medium (not shown) of the heat source device 7 flows, and the other end connected to a heat medium flow path 42 in the heater 5. The heat medium heated by the heat source device 7, for example, water flows through the heat medium pipe 9a. One end of the heat medium pipe 9 b is connected to a heat medium flow path 42 in the heater 5.
The other end is connected to a flow path of the heat source unit 7 through which a heat medium (not shown) flows, and the heat medium released from the heater 5 flows through the heat medium pipe 9b. A bypass pipe 9c is provided between a portion of the heat medium pipe 9a on the outlet side of the heat medium from the heat source device 7 and a portion of the heat medium pipe 9b on the inlet side of the heat medium to the heat source device 7. The bypass pipe 9c is provided with a heat medium amount adjusting valve 43 that adjusts the amount of the heat medium that flows to the heater 5 by flowing and blocking the heat medium to and from the bypass pipe 9c. The heat medium amount adjusting valve 43 is electrically connected to the control unit 11 via the wiring 33. The bypass pipe 9c and the heat medium amount adjusting valve 43 have a pipe resistance smaller than that of the heat medium pipe 9a.
【００２５】本実施形態の加熱器５は、加熱器５を形成
する上面が開放された筐体内に熱媒が通流する流路４２
となる管路を設け、この管路と筐体及び容器との間に形
成される空間に液体からなる熱媒、または熱伝導性を有
する材料などを充填したものである。そして、加熱器５
には、この熱媒または熱伝導性を有する材料などの温度
を検出する温度検出器４５を設けている。温度検出器４
５は、配線３３を介して制御部１１と電気的に接続され
ている。The heater 5 according to the present embodiment has a flow path 42 through which a heat medium flows in a housing having an open upper surface forming the heater 5.
And a space formed between the pipe and the housing and the container is filled with a heat medium made of a liquid, a material having thermal conductivity, or the like. And the heater 5
Is provided with a temperature detector 45 for detecting the temperature of the heat medium or the material having thermal conductivity. Temperature detector 4
5 is electrically connected to the control unit 11 via the wiring 33.
【００２６】第１圧力検出器１３、圧力検出用管路１
５、圧力検出用管路１５の開閉弁１９、ガス管路３の開
閉弁２１、遮断弁２５、１次側圧力調整器２７、ガス放
出防止器２９、第２圧力検出器３１、熱源機用ガス管路
２３の熱源機用ガス放出防止器３５、単段圧力調整器３
７、そしてこれら各々機器などが設けられたガス管路３
の部分及び熱源機用ガス管路２３の部分などは容器１の
上部に取り付けられた箱状のカバー４７に内包されてい
る。さらに、カバー４７内には、地震などによる容器１
の揺れを感知するための感震器４９が設けられており、
感震器４９は、予め設定した強度の揺れ、つまり震度以
上の揺れを感知すると信号を制御部１１に向けて発信す
る。このため、感震器４９は、配線３３を介して制御部
１１と電気的に接続されている。なお、制御部１１は、
図示していないネットワークコントロールユニット（以
降ＮＣＵと略称する）に図示していない配線を介して電
気的に接続されており、ＮＣＵに接続されている電話回
線などを介して図示していない監視センターといった施
設や監視装置などに情報を送信することができる。The first pressure detector 13, the pressure detection pipe 1
5. Opening / closing valve 19 of pressure detection pipe 15, opening / closing valve 21 of gas pipe 3, shutoff valve 25, primary side pressure regulator 27, gas release preventer 29, second pressure detector 31, for heat source unit Gas release 23 for heat source equipment in gas line 23, single-stage pressure regulator 3
7, and a gas pipeline 3 provided with each of these devices and the like
Are enclosed in a box-shaped cover 47 attached to the upper part of the container 1. Further, inside the cover 47, a container 1 caused by an earthquake or the like is provided.
There is a seismic sensor 49 for detecting the shaking of
The seismic sensor 49 transmits a signal to the control unit 11 when detecting a vibration of a preset intensity, that is, a vibration of a seismic intensity or higher. For this reason, the seismic device 49 is electrically connected to the control unit 11 via the wiring 33. In addition, the control unit 11
A monitoring center (not shown) is electrically connected to a network control unit (not shown) (hereinafter abbreviated as NCU) via wiring (not shown), and a telephone line connected to the NCU. Information can be transmitted to facilities and monitoring devices.
【００２７】なお、制御部１１、遮断弁２５、ガス放出
防止器２９、第２圧力検出器３１、そして感震器４９な
どは、通常の圧力よりも高い圧力で気相の液化ガスを供
給する液化ガス供給装置の保安機構を構成している。The control unit 11, the shut-off valve 25, the gas release preventing device 29, the second pressure detector 31, the seismic device 49, and the like supply the gaseous liquefied gas at a pressure higher than the normal pressure. It constitutes the security mechanism of the liquefied gas supply device.
【００２８】このような構成の液化ガス供給装置の動作
と本発明の特徴部について説明する。まず、本実施形態
の液化ガス供給装置での要求される圧力で気相の液化ガ
スを供給するための動作を説明する。制御部１１が圧力
検出器１３で検出した容器１内の圧力に応じてバイパス
管路９ｃに設けられた熱媒量調整弁４３を開閉する。こ
れにより、容器１の加熱が必要なときには、加熱器５に
流れる熱媒量を増加させ、容器１の加熱が必要ないとき
には、加熱器１に流れる熱媒量を減少させることで、加
熱器５から容器１に与えられる熱量を調整し、容器１内
の圧力を所定の圧力、つまり本実施形態ではマイクロガ
スタービン２０が要求する圧力よりも高い圧力に保持し
ている。The operation of the liquefied gas supply device having such a configuration and the features of the present invention will be described. First, an operation for supplying a gaseous liquefied gas at a required pressure in the liquefied gas supply device of the present embodiment will be described. The control unit 11 opens and closes the heat medium amount adjusting valve 43 provided in the bypass pipe 9c according to the pressure in the container 1 detected by the pressure detector 13. Thereby, when the heating of the container 1 is necessary, the amount of the heat medium flowing to the heater 5 is increased, and when the heating of the container 1 is not necessary, the amount of the heat medium flowing to the heater 1 is reduced, so that the heater 5 is heated. The amount of heat applied to the container 1 is adjusted, and the pressure in the container 1 is maintained at a predetermined pressure, that is, a pressure higher than the pressure required by the micro gas turbine 20 in this embodiment.
【００２９】所定の圧力に保持された気相の液化ガス
は、１次側圧力調整器２７でマイクロガスタービン２０
が要求する圧力まで降圧され、ガス管路３を介してマイ
クロガスタービン２０に供給される。一方、ガス管路２
３を通流する気相の液化ガスは、単段圧力調整器４１
で、熱源機７や燃焼機器４０などが要求する圧力、つま
り通常の液化ガスの供給圧力に降圧されて熱源機７や燃
焼機器４０などに供給される。なお、図１において実線
の矢印は、液化ガスの通流方向を、そして破線の矢印
は、熱媒の通流方向を示す。The gaseous liquefied gas maintained at a predetermined pressure is supplied to the micro gas turbine 20 by the primary side pressure regulator 27.
Is reduced to the required pressure and supplied to the micro gas turbine 20 via the gas line 3. On the other hand, gas line 2
The gaseous liquefied gas flowing through 3 is supplied to a single-stage pressure regulator 41.
Then, the pressure is reduced to the pressure required by the heat source unit 7 and the combustion device 40, that is, the supply pressure of the ordinary liquefied gas, and supplied to the heat source unit 7 and the combustion device 40. In FIG. 1, solid arrows indicate the direction of flow of the liquefied gas, and broken lines indicate the direction of flow of the heat medium.
【００３０】次に、本実施形態の液化ガス供給装置での
保安にかかわる動作を説明する。制御部１１は、温度検
出器４５により加熱器５の容器１の加熱温度を監視して
おり、温度検出器４５で検出した温度が予め設定された
温度、例えば４０℃以上になると、熱源機７の熱媒を加
熱するバーナー、そして熱媒を加熱器５に送るためのポ
ンプなどを停止し、容器１の加熱を停止する。これによ
り容器１の温度が法律などに規定された温度を越えた
り、危険な温度に上昇するのを防いでいる。Next, an operation related to security in the liquefied gas supply device of the present embodiment will be described. The control unit 11 monitors the heating temperature of the container 1 of the heater 5 with the temperature detector 45, and when the temperature detected by the temperature detector 45 becomes a preset temperature, for example, 40 ° C. or more, the heat source device 7 Then, the burner for heating the heating medium, the pump for sending the heating medium to the heater 5 and the like are stopped, and the heating of the container 1 is stopped. As a result, the temperature of the container 1 is prevented from exceeding the temperature prescribed by law or the like, or rising to a dangerous temperature.
【００３１】一方、本実施形態の液化ガス供給装置が気
相の液化ガスをマイクロガスタービン２０に供給してい
るとき、制御部１１は、第２圧力検出器３１によりガス
管路３内の圧力を監視している。制御部１１は、ガス管
路３内の圧力が予め設定した圧力以下になると、例えば
マイクロガスタービン２０に０.４ＭＰａの圧力で気相
の液化ガスを供給する場合、０.２ＭＰａ以下になると
遮断弁２５を閉じてガス管路３内の気相の液化ガスの通
流を遮断し、マイクロガスタービン２０への気相の液化
ガスの供給を停止する。また、制御部１１は、このよう
な異常の発生を監視センターや監視装置などに知らせ
る。ガス管路３内の圧力の低下の原因は、ガス管路３以
降の気相の液化ガスの流路でのガスの漏洩の発生や、加
熱器５、熱媒管路９ａ、９ｂ、熱源機７、そして熱媒量
調整弁４３などの故障などによって容器１を加熱できな
くなったことによる容器１内の圧力の低下などが考えら
れる。したがって、これらの異常の発生に関する点検や
修理などの対処を行う。On the other hand, when the liquefied gas supply device of the present embodiment is supplying the gaseous liquefied gas to the micro gas turbine 20, the control unit 11 uses the second pressure detector 31 to control the pressure in the gas line 3. Is monitoring. When the pressure in the gas pipeline 3 becomes equal to or lower than a preset pressure, for example, when the gaseous liquefied gas is supplied to the micro gas turbine 20 at a pressure of 0.4 MPa, the controller 11 shuts down the gas when the pressure becomes 0.2 MPa or lower. The valve 25 is closed to shut off the flow of the gaseous liquefied gas in the gas pipeline 3, and the supply of the gaseous liquefied gas to the micro gas turbine 20 is stopped. Further, the control unit 11 notifies the occurrence of such an abnormality to a monitoring center, a monitoring device, and the like. The causes of the decrease in the pressure in the gas pipe 3 include the occurrence of gas leakage in the gaseous liquefied gas flow path after the gas pipe 3, the heater 5, the heat medium pipes 9 a and 9 b, and the heat source device. 7, and a decrease in the pressure in the container 1 due to the failure to heat the container 1 due to a failure of the heat medium amount adjustment valve 43 or the like. Therefore, countermeasures such as inspection and repair for occurrence of these abnormalities are taken.
【００３２】このような異常の発生に関する点検や修理
などの対処を行った後、気相の液化ガスの供給開始を指
令すると、制御部１１は、遮断弁２５を閉じた状態で第
２圧力検出器３１によりガス管路３内の圧力を監視す
る。そして、予め設定した時間内でのガス管路３内の圧
力の変化を検出し、ガス管路３内の圧力が低下していな
ければガスの漏洩がないものと判断し、遮断弁２５を開
く。なお、ガス漏れの検知において、ガス管路３内の温
度を検出する温度検出器を設置してガス管路３内の温度
を監視し、制御部１１が、ガス管路３内の圧力の変化を
ガス管路３内の温度の変化で補償した上で、ガス管路３
内の圧力が低下しているか否かを判断するようにすれ
ば、より正確にガスの漏洩を検出できる。After taking measures such as checking and repairing the occurrence of such an abnormality, when the supply of gaseous liquefied gas is commanded, the control unit 11 detects the second pressure with the shut-off valve 25 closed. The pressure in the gas line 3 is monitored by the vessel 31. Then, a change in the pressure in the gas pipeline 3 within a preset time is detected. If the pressure in the gas pipeline 3 has not decreased, it is determined that there is no gas leakage, and the shutoff valve 25 is opened. . In detecting a gas leak, a temperature detector for detecting the temperature in the gas pipeline 3 is installed to monitor the temperature in the gas pipeline 3, and the controller 11 detects a change in the pressure in the gas pipeline 3. Is compensated for by the change in temperature in the gas line 3, and
If it is determined whether or not the internal pressure is reduced, gas leakage can be detected more accurately.
【００３３】なお、第２圧力検出器３１によるガス漏れ
の検知を行い、ガス漏れがない場合に遮断弁２５を開く
制御は、異常の発生により遮断した気相の液化ガスの供
給を再開する場合に限らず、マイクロガスタービン２０
の起動時、つまり液化ガス供給装置の気相の液化ガスの
供給開始時などにも行うことができる。このとき、も
し、ガス管路３内が圧力の低下を検出できるだけの圧力
にない場合には、一端遮断弁２５を開けてガス管路３内
に気相の液化ガスを流入させ、その後遮断弁２５を閉じ
てガス漏れの検出を行う。The control for opening the shut-off valve 25 when the gas leak is detected by the second pressure detector 31 and there is no gas leak is performed when the supply of the gaseous liquefied gas shut off due to the occurrence of the abnormality is restarted. Not limited to the micro gas turbine 20
At the start of the operation, that is, when the supply of the gaseous liquefied gas from the liquefied gas supply device is started. At this time, if the pressure in the gas line 3 is not at a pressure enough to detect a decrease in pressure, the shut-off valve 25 is opened once to allow the gaseous liquefied gas to flow into the gas line 3 and then shut off. 25 is closed to detect gas leakage.
【００３４】制御部１１は、感震器４９で液化ガス供給
装置が破損する可能性があるような強い揺れ、例えば震
度５〜６以上の強い揺れを感知した場合には、遮断弁２
５を閉じる。これにより、ガス管路３などが破損した場
合でも、気相の液化ガスが外部に流出するのを防いでい
る。When the seismic sensor 49 detects a strong shake that may damage the liquefied gas supply device, for example, a strong shake having a seismic intensity of 5 to 6 or more, the control unit 11 controls the shut-off valve 2.
Close 5. This prevents the gaseous liquefied gas from flowing out even if the gas pipeline 3 or the like is damaged.
【００３５】また、本実施形態の液化ガス供給装置で
は、ガス管路３にガス放出防止器２９を設けているの
で、ガス管路３以降の気相の液化ガスの流路でのガスの
漏洩が起こった場合は、ガス管路３内の気相の液化ガス
の流量が増大することでもガスの漏洩を検知できる。す
なわち、ガスの漏洩が生じ、ガス管路３内の気相の液化
ガスの流量がガス放出防止器２９に設定された流量以上
になると、ガス放出防止器２９が作動してガス管路３内
の気相の液化ガスの通流を遮断する。これにより、液化
ガスがガス管路３などの外部に漏れるのを防ぐことがで
きる。Further, in the liquefied gas supply device of the present embodiment, since the gas discharge preventing device 29 is provided in the gas line 3, gas leakage in the gaseous phase liquefied gas flow path after the gas line 3 is performed. Occurs, the leakage of gas can also be detected by increasing the flow rate of the gaseous liquefied gas in the gas pipeline 3. That is, when a gas leaks and the flow rate of the gaseous liquefied gas in the gas line 3 becomes equal to or higher than the flow rate set in the gas line prevention device 29, the gas line prevention device 29 operates and the gas line 3 Of the gaseous liquefied gas is shut off. Thereby, it is possible to prevent the liquefied gas from leaking to the outside such as the gas pipeline 3.
【００３６】ところで、本実施形態の液化ガス供給装置
では、通常の圧力よりも高い圧力で気相の液化ガスを供
給する液化ガス供給装置であるため、通常の圧力で気相
の液化ガスを供給する液化ガス供給装置に比べて遮断弁
２５よりも上流側つまり容器１内などと遮断弁２５より
も下流側との圧力差が大きく、遮断弁２５が瞬時に開か
れると、ガス管路３の遮断弁２５よりも下流側に気相の
液化ガスが一気に流入し、ガス管路３内の気相の液化ガ
スの流量がガス放出防止器２９に設定された流量以上に
なり、ガス放出防止器２９が誤作動してガス管路３内の
気相の液化ガスの通流を遮断してしまう場合がある。し
たがって、本実施形態の液化ガス供給装置は、ガス管路
３にモータの駆動により弁の開度を連続的に変えること
ができる遮断弁２５を設けており、制御部１１は、マイ
クロガスタービン２０からの駆動開始信号または気相の
液化ガスの供給を指令する信号を受信すると、遮断弁２
５を徐々に開く。これにより、ガス管路３内に通流する
気相の液化ガスの流量が放出防止弁２９に設定された流
量以上にならないようにし、気相の液化ガスの供給開始
時に発生するガス放出防止器２９の誤作動を防いでい
る。The liquefied gas supply device of this embodiment is a liquefied gas supply device that supplies a gaseous liquefied gas at a pressure higher than a normal pressure, and therefore supplies a gaseous liquefied gas at a normal pressure. When the pressure difference between the upstream side of the shut-off valve 25, that is, the inside of the container 1 and the downstream side of the shut-off valve 25 is larger than that of the liquefied gas supply device, and the shut-off valve 25 is opened instantaneously, The gaseous liquefied gas flows at a stroke downstream of the shut-off valve 25, and the flow rate of the gaseous liquefied gas in the gas pipeline 3 becomes equal to or higher than the flow rate set in the gas release preventing device 29, and There is a case where the flow of the gaseous liquefied gas in the gas line 3 is interrupted due to malfunction of the gas line 3. Therefore, the liquefied gas supply device of the present embodiment is provided with the shutoff valve 25 that can continuously change the opening degree of the valve by driving the motor in the gas pipeline 3. Receives a drive start signal from the controller or a signal instructing the supply of gaseous liquefied gas, the shut-off valve 2
Open 5 gradually. Thus, the flow rate of the gaseous liquefied gas flowing through the gas pipeline 3 is prevented from being equal to or higher than the flow rate set in the release prevention valve 29, and the gas release preventing device generated at the start of the supply of the gaseous liquefied gas is started. This prevents 29 malfunctions.
【００３７】このように本実施形態の液化ガス供給装置
では、制御部１１が第２圧力検出器によってガス管路３
内の圧力を監視し、ガス管路３内の圧力の低下から、ガ
ス漏れや、容器１を加熱できないなどの異常を検知して
遮断弁２５を閉じている。したがって、異常が発生した
場合、気相の液化ガスの供給を停止することができるた
め、液化ガス供給装置の安全性を向上できる。As described above, in the liquefied gas supply device of the present embodiment, the control unit 11 controls the gas line 3 by the second pressure detector.
The pressure inside the gas line 3 is monitored, and an abnormality such as a gas leak or an inability to heat the container 1 is detected based on a decrease in the pressure in the gas pipeline 3, and the shutoff valve 25 is closed. Therefore, when an abnormality occurs, the supply of the gaseous liquefied gas can be stopped, so that the safety of the liquefied gas supply device can be improved.
【００３８】さらに、本実施形態の液化ガス供給装置で
は、マイクロガスタービン２０の起動時に気相の液化ガ
スの供給を開始するときや、異常の発生により気相の液
化ガスの供給を停止した後に気相の液化ガスの供給を開
始するときなど、遮断弁２５を閉じてガス管路３に気相
の液化ガスが封入された状態で第２圧力検出器３１によ
って設定された時間内におけるガス管路３内の圧力の変
化を検出することでガス漏れを検知し、ガス漏れが検知
されなかったときに遮断弁を開いている。したがって、
ガス漏れが起こっていない状態を確認した上で気相の液
化ガスを通流させるため、液化ガス供給装置の安全性を
より向上できる。加えて、容器１の揺れを感知する感震
器４９を設け、ガス管路３などが破損するような震度の
地震が発生した場合に遮断弁２５を閉じて気相の液化ガ
スの通流を遮断できるため、さらに安全性を向上できる
ので好ましい。Further, in the liquefied gas supply device of the present embodiment, when the supply of the gaseous liquefied gas is started when the micro gas turbine 20 is started, or after the supply of the gaseous liquefied gas is stopped due to occurrence of an abnormality, When the supply of the gaseous liquefied gas is started, for example, when the shut-off valve 25 is closed and the gaseous liquefied gas is sealed in the gas line 3, the gas pipe in the time set by the second pressure detector 31 is set. A gas leak is detected by detecting a change in pressure in the passage 3, and the shut-off valve is opened when the gas leak is not detected. Therefore,
Since the gas-phase liquefied gas is allowed to flow after confirming that no gas leakage has occurred, the safety of the liquefied gas supply device can be further improved. In addition, a seismic sensor 49 that senses the vibration of the container 1 is provided, and when an earthquake with a seismic intensity that may damage the gas pipeline 3 or the like occurs, the shutoff valve 25 is closed to allow the flow of the gaseous liquefied gas. This is preferable because the safety can be further improved because it can be shut off.
【００３９】また、本実施形態の液化ガス供給装置で
は、安全性を向上するためにガス管路３にガス放出防止
器２９を設けているが、通常の液化ガスの供給圧力より
も高い供給圧力で液化ガスを供給するため、遮断弁２５
を徐々に開いて行くことで液化ガスの供給を開始すると
きに発生するガス放出防止器２９の誤動作を防いでい
る。さらに、マイクロガスタービン２０の駆動及び停止
に対応して遮断弁２５を開及び閉するため、マイクロガ
スタービン２０が停止しているときにガス管路３内に新
たな液化ガスが侵入するのを防ぎ、再液化する液化ガス
の量を低減できる。Further, in the liquefied gas supply apparatus of the present embodiment, the gas discharge preventing device 29 is provided in the gas pipeline 3 for improving safety, but the supply pressure is higher than the normal liquefied gas supply pressure. To supply the liquefied gas at
Is gradually opened to prevent the malfunction of the gas emission preventer 29 generated when the supply of the liquefied gas is started. Further, since the shut-off valve 25 is opened and closed in response to driving and stopping of the micro gas turbine 20, it is possible to prevent new liquefied gas from entering the gas pipeline 3 when the micro gas turbine 20 is stopped. The amount of liquefied gas to be prevented and reliquefied can be reduced.
【００４０】また、本実施形態では、ガス放出防止器２
９と第２圧力検出器３１との両方をガス管路３に設けて
いるが、ガス漏れの検知を行う上では、いずれか一方の
みを設けた構成にすることもできる。ただし、ガス放出
防止器２９と第２圧力検出器３１との両方を設けた構成
である方が安全性を一層向上することができる。In the present embodiment, the gas release preventing device 2
Although both the pressure sensor 9 and the second pressure detector 31 are provided in the gas pipeline 3, it is also possible to adopt a configuration in which only one of them is provided for detecting gas leakage. However, the configuration in which both the gas release preventing device 29 and the second pressure detector 31 are provided can further improve the safety.
【００４１】また、本実施形態では、第１圧力検出器１
３で容器１内の圧力を検出し、温度検出器４５で加熱器
５の温度を検出する構成としているが、第１圧力検出器
は、ガス管路３の１次側圧力調整器２７よりも上流側の
部分の圧力を検出する構成にすることができ、また、温
度検出器は、容器１の温度を検出する構成にすることも
できる。In the present embodiment, the first pressure detector 1
3, the pressure in the vessel 1 is detected, and the temperature detector 45 detects the temperature of the heater 5. However, the first pressure detector is more than the primary pressure regulator 27 of the gas pipe 3. The configuration may be such that the pressure of the upstream portion is detected, and the temperature detector may be configured to detect the temperature of the container 1.
【００４２】また、本発明は、本実施形態の構成の液化
ガス供給装置に限らず、容器を加熱することで通常の液
化ガスの供給圧よりも高い圧力で液化ガスを供給する液
化ガス供給装置、さらに、マイクロガスタービン２０に
限らず、通常の液化ガスの供給圧よりも高い様々な供給
圧力を要求する装置や機器類に液化ガスを供給する液化
ガス供給装置に適用できる。Further, the present invention is not limited to the liquefied gas supply apparatus having the structure of the present embodiment, but a liquefied gas supply apparatus for supplying a liquefied gas at a pressure higher than a normal liquefied gas supply pressure by heating a container. Further, the present invention can be applied not only to the micro gas turbine 20 but also to a liquefied gas supply device that supplies a liquefied gas to devices and devices that require various supply pressures higher than a normal liquefied gas supply pressure.
【００４３】[0043]
【発明の効果】本発明によれば、液化ガス供給装置の安
全性を向上できる。According to the present invention, the safety of the liquefied gas supply device can be improved.
【図１】本発明を適用してなる液化ガス供給装置の一実
施形態の概略構成と動作を示す模式図である。FIG. 1 is a schematic diagram showing a schematic configuration and operation of an embodiment of a liquefied gas supply device to which the present invention is applied.
１ 容器 ３ ガス管路 ５ 加熱器 ７ 熱源機 ９ａ、９ｂ、９ｃ 熱媒管路 １１ 制御部 １３ 第１圧力検出器 ２５ 遮断弁 ２７ 一次側圧力調整器 ３１ 第２圧力検出器 ４３ 熱媒量調整弁 ４５ 温度検出器 DESCRIPTION OF SYMBOLS 1 Container 3 Gas line 5 Heater 7 Heat source device 9a, 9b, 9c Heat medium line 11 Control part 13 First pressure detector 25 Shut-off valve 27 Primary pressure regulator 31 Second pressure detector 43 Heat medium amount adjustment Valve 45 Temperature detector
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3E072 DB03 GA30 3J071 AA23 BB14 CC11 CC14 EE02 EE24 EE25 EE27 EE30 3K068 AA02 AB19 BB12 BB24 BB25 DA01 DA09 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E072 DB03 GA30 3J071 AA23 BB14 CC11 CC14 EE02 EE24 EE25 EE27 EE30 3K068 AA02 AB19 BB12 BB24 BB25 DA01 DA09
Claims (7)
の気相部に連通するガス管路と、該ガス管路に設けられ
て該ガス管路内のガスの通流を遮断する遮断弁と、前記
ガス管路に設けられて該ガス管路内を通流する気相の液
化ガスの圧力を調整する圧力調整手段と、前記容器内ま
たは前記ガス管路の前記圧力調整手段よりも気相の液化
ガスの流れに対して上流側の圧力を検出する第１の圧力
検出手段と、前記容器内の液化ガスを加熱する液化ガス
加熱手段と、前記容器の温度または前記液化ガス加熱手
段の前記容器の加熱温度を検出する温度検出手段とを備
え、前記第１の圧力検出手段で検出した圧力に応じて前
記液化ガス加熱手段が放出する熱量を調整し、前記温度
検出手段で検出した温度が設定された温度以上になると
前記液化ガス加熱手段による前記容器内の液化ガスの加
熱を停止する液化ガス供給装置であり、 前記ガス管路に、該ガス管路の前記圧力調整手段よりも
気相の液化ガスの流れに対して下流側の圧力を検出する
第２の圧力検出手段を設け、該第２の圧力検出手段で検
出した圧力に応じて前記遮断弁を閉じることを特徴とす
る液化ガス供給装置。1. A container accommodating a liquefied gas, a gas line communicating with a gas phase part in the container, and a gas line provided in the gas line to block gas flow in the gas line. A shutoff valve, pressure adjusting means provided in the gas line and adjusting the pressure of a gaseous liquefied gas flowing through the gas line, and pressure adjusting means in the vessel or the gas line. First pressure detecting means for detecting the pressure on the upstream side with respect to the flow of the liquefied gas in the gas phase; liquefied gas heating means for heating the liquefied gas in the vessel; Means for detecting the heating temperature of the vessel of the means, wherein the amount of heat released by the liquefied gas heating means is adjusted according to the pressure detected by the first pressure detecting means, and the temperature is detected by the temperature detecting means. When the temperature becomes higher than the set temperature, the liquefied gas heating A liquefied gas supply device for stopping heating of the liquefied gas in the vessel by means of a step, wherein the gas pipeline has a downstream side with respect to the flow of the gaseous liquefied gas from the pressure adjusting means in the gas pipeline. A liquefied gas supply device comprising: a second pressure detecting means for detecting a pressure; and closing the shutoff valve according to the pressure detected by the second pressure detecting means.
き、前記第２の圧力検出手段で検出した圧力が設定され
た圧力以下になると前記遮断弁を閉じることを特徴とす
る請求項１に記載の液化ガス供給装置。2. The system according to claim 1, wherein when the gaseous liquefied gas is being supplied, the shutoff valve is closed when the pressure detected by the second pressure detecting means falls below a set pressure. 4. The liquefied gas supply device according to 4.
相の液化ガスの流れに対して上流側に設けられており、
気相の液化ガスの供給を開始するとき、前記遮断弁が閉
じられ前記ガス管路に気相の液化ガスが封入された状態
で前記第２の圧力検知手段によって前記ガス管路の前記
圧力調整手段よりも気相の液化ガスの流れに対して下流
側の圧力の変化を検出し、該検出した圧力の変化からガ
ス漏れを検知し、ガス漏れが検知されなかったときに前
記遮断弁を開くことを特徴とする請求項１または２に記
載の液化ガス供給装置。3. The shut-off valve is provided upstream of the pressure adjusting means with respect to the flow of the liquefied gas in a gas phase.
When the supply of the gaseous liquefied gas is started, the pressure adjustment of the gas line is performed by the second pressure detecting means in a state where the shutoff valve is closed and the gas line is filled with the gaseous liquefied gas. Detecting a change in pressure on the downstream side with respect to the flow of the liquefied gas in the gaseous phase from the means, detecting gas leakage from the detected change in pressure, and opening the shut-off valve when no gas leakage is detected The liquefied gas supply device according to claim 1 or 2, wherein:
し、該感震器が設定された震度以上の揺れを感知すると
前記遮断弁を閉じることを特徴とする請求項１乃至３の
いずれか１項に記載の液化ガス供給装置。4. The apparatus according to claim 1, further comprising a seismic sensor for detecting a shake of the container, wherein the shut-off valve is closed when the shaker detects a shake of a set seismic intensity or higher. The liquefied gas supply device according to claim 1.
の気相部に連通するガス管路と、該ガス管路に設けられ
て該ガス管路内の気相の液化ガスの通流を遮断する遮断
弁と、前記ガス管路に設けられて該ガス管路内を通流す
る気相の液化ガスの圧力を調整する圧力調整手段と、前
記容器内または前記ガス管路の前記圧力調整手段よりも
気相の液化ガスの流れに対して上流側の圧力を検出する
圧力検出手段と、前記容器内の液化ガスを加熱する液化
ガス加熱手段と、前記容器の温度または前記液化ガス加
熱手段の前記容器の加熱温度を検出する温度検出手段と
を備え、前記圧力検出手段で検知した圧力に応じて前記
液化ガス加熱手段が放出する熱量を調整し、前記温度検
出手段で検出した温度が所定の温度以上になると前記液
化ガス加熱手段による前記容器内の液化ガスの加熱を停
止する液化ガス供給装置であり、 前記ガス管路の前記圧力調整手段より気相の液化ガスの
通流方向に対して下流側に設置され、気相の液化ガスの
流量が設定された流量以上になると前記ガス管路内の気
相の液化ガスの通流を遮断するガス放出防止器を前記ガ
ス管路に設け、液化ガスの供給を開始するとき、前記遮
断弁を徐々に開いて行くことを特徴とする液化ガス供給
装置。5. A container for accommodating a liquefied gas, a gas line communicating with a gas phase in the container, and a gas line provided in the gas line for passing a gaseous liquefied gas in the gas line. A shutoff valve for shutting off a flow, a pressure adjusting means provided in the gas line to adjust the pressure of a gaseous liquefied gas flowing through the gas line, and the pressure control means in the vessel or the gas line. Pressure detecting means for detecting the pressure on the upstream side with respect to the flow of the gaseous liquefied gas from the pressure adjusting means, liquefied gas heating means for heating the liquefied gas in the container, and the temperature of the container or the liquefied gas Temperature detecting means for detecting the heating temperature of the container of the heating means, adjusting the amount of heat released by the liquefied gas heating means according to the pressure detected by the pressure detecting means, the temperature detected by the temperature detecting means Is higher than a predetermined temperature, the liquefied gas heating means A liquefied gas supply device for stopping heating of the liquefied gas in the vessel, which is installed downstream from the pressure adjusting means in the gas pipeline with respect to the direction of flow of the liquefied gas in the gas phase. When the flow rate of the liquefied gas is equal to or higher than the set flow rate, a gas emission preventing device that shuts off the flow of the gaseous liquefied gas in the gas pipeline is provided in the gas pipeline, and when the supply of the liquefied gas is started, A liquefied gas supply device characterized by gradually opening the shutoff valve.
相の液化ガスの通流方向に対して下流側に設置され、気
相の液化ガスの流量が設定された流量以上になると前記
ガス管路内の気相の液化ガスの通流を遮断するガス放出
防止器を前記ガス管路に設け、液化ガスの供給を開始す
るとき、前記遮断弁を徐々に開いて行くことを特徴とす
る請求項１乃至４のいずれか１項に記載の液化ガス供給
装置。6. The gas line is provided downstream of the pressure adjusting means with respect to the direction of flow of the gaseous liquefied gas, and the gas is supplied when the flow rate of the gaseous liquefied gas exceeds a set flow rate. A gas discharge preventer for blocking the flow of gaseous liquefied gas in the pipeline is provided in the gas pipeline, and when the supply of the liquefied gas is started, the shutoff valve is gradually opened. The liquefied gas supply device according to any one of claims 1 to 4.
動及び停止に対応して前記遮断弁を開及び閉することを
特徴とする請求項１乃至６のいずれか１項に記載の液化
ガス供給装置。7. The liquefied gas supply according to claim 1, wherein the shut-off valve is opened and closed in response to driving and stopping of a device or a device for supplying the liquefied gas. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001181274A JP4038647B2 (en) | 2001-06-15 | 2001-06-15 | Liquefied gas supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001181274A JP4038647B2 (en) | 2001-06-15 | 2001-06-15 | Liquefied gas supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002372193A true JP2002372193A (en) | 2002-12-26 |
| JP4038647B2 JP4038647B2 (en) | 2008-01-30 |
Family
ID=19021565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001181274A Expired - Fee Related JP4038647B2 (en) | 2001-06-15 | 2001-06-15 | Liquefied gas supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4038647B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100624262B1 (en) | 2005-02-18 | 2006-09-19 | 김능수 | Preventing explosion apparatus for moving and charging of LPG |
| US8502064B2 (en) | 2003-12-11 | 2013-08-06 | Philip Morris Usa Inc. | Hybrid system for generating power |
| CN104482401A (en) * | 2014-12-09 | 2015-04-01 | 淄博绿成燃气设备有限公司 | Bi-fuel gas pressure-reducing releasing device |
| CN110513600A (en) * | 2019-09-06 | 2019-11-29 | 中国石油工程建设有限公司 | A kind of gaseous ethane pipe end flow assurance system and method |
| WO2023155275A1 (en) * | 2022-02-21 | 2023-08-24 | 烟台杰瑞石油装备技术有限公司 | Pressure regulating system and pressure regulating system control method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295893B (en) * | 2014-10-20 | 2016-07-06 | 江苏鸿昌特种车辆有限公司 | A kind of cryogenic liquid transports basin safely |
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2001
- 2001-06-15 JP JP2001181274A patent/JP4038647B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8502064B2 (en) | 2003-12-11 | 2013-08-06 | Philip Morris Usa Inc. | Hybrid system for generating power |
| KR100624262B1 (en) | 2005-02-18 | 2006-09-19 | 김능수 | Preventing explosion apparatus for moving and charging of LPG |
| CN104482401A (en) * | 2014-12-09 | 2015-04-01 | 淄博绿成燃气设备有限公司 | Bi-fuel gas pressure-reducing releasing device |
| CN110513600A (en) * | 2019-09-06 | 2019-11-29 | 中国石油工程建设有限公司 | A kind of gaseous ethane pipe end flow assurance system and method |
| CN110513600B (en) * | 2019-09-06 | 2024-04-16 | 中国石油工程建设有限公司 | Gaseous ethane pipeline tail end flow guarantee system and method |
| WO2023155275A1 (en) * | 2022-02-21 | 2023-08-24 | 烟台杰瑞石油装备技术有限公司 | Pressure regulating system and pressure regulating system control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4038647B2 (en) | 2008-01-30 |
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