JP2011144915A - Liquefied fuel gas vaporizing device - Google Patents

Liquefied fuel gas vaporizing device Download PDF

Info

Publication number
JP2011144915A
JP2011144915A JP2010008486A JP2010008486A JP2011144915A JP 2011144915 A JP2011144915 A JP 2011144915A JP 2010008486 A JP2010008486 A JP 2010008486A JP 2010008486 A JP2010008486 A JP 2010008486A JP 2011144915 A JP2011144915 A JP 2011144915A
Authority
JP
Japan
Prior art keywords
fuel gas
vaporizer
liquefied fuel
storage tank
standby state
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
Application number
JP2010008486A
Other languages
Japanese (ja)
Inventor
Kazuki Yasuda
和貴 安田
Hisanori Shimizu
久記 清水
Takashi Onishi
尚 大西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Creative Techno Solution Co Ltd
Original Assignee
Creative Techno Solution Co Ltd
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.)
Filing date
Publication date
Application filed by Creative Techno Solution Co Ltd filed Critical Creative Techno Solution Co Ltd
Priority to JP2010008486A priority Critical patent/JP2011144915A/en
Publication of JP2011144915A publication Critical patent/JP2011144915A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquefied gas vaporizing device which suppresses the fluctuation in a calorific value of supplied fuel gas when a vaporizer is switched from a standby state to operation condition. <P>SOLUTION: The liquefied fuel gas vaporizing device includes an operation condition switching means C for switching a plurality of systems of a vaporizer V between the operation condition in which a liquefied fuel gas G is conducted and the standby state in the which liquefied fuel gas G is not conducted separately and a control means 2 for controlling the operation of the operation condition switching means C so that each of the plurality of systems of the vaporizer V is switched to the operation condition and the standby state when part of the plurality of the systems of the vaporizer V is in the operation condition and the remainder is in the standby state. Each of the plurality of the systems of the vaporizer V has an agitating means M for agitating a heat medium W in a storage tank 4. The control means 2 brings the agitating means M of the vaporizer V switched to the standby state into the agitating operation by the operation condition switching means C. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、液状の熱媒体を貯留する貯槽と、その貯槽内の熱媒体を加熱する加熱手段と、その貯槽内に配設されて、供給される液化燃料ガスを熱媒体との熱交換により気化して燃料ガスを送出する伝熱管とを備えて構成された気化器が、複数系統設けられ、それら複数系統の気化器を各別に液化燃料ガスを通流させる運転状態と液化燃料ガスを通流させない待機状態とに切り換える運転状態切換手段が設けられ、前記複数系統の気化器のうちの一部が前記運転状態となり残りが前記待機状態となる形態で、前記複数系統の気化器夫々を前記運転状態と前記待機状態とに切り換えるべく、前記運転状態切換手段の作動を制御する制御手段が設けられた液化燃料ガス気化装置、及び、液状の熱媒体を貯留する貯槽と、その貯槽内の熱媒体を加熱する加熱手段と、その貯槽内に配設されて、供給される液化燃料ガスを熱媒体との熱交換により気化して燃料ガスを送出する伝熱管とを備えて構成された気化器が設けられ、その気化器を液化燃料ガスを通流させる運転状態と液化燃料ガスを通流させない待機状態とに切り換える運転状態切換手段と、前記気化器を前記運転状態と前記待機状態とに切り換えるべく、前記運転状態切換手段の作動を制御する制御手段とが設けられた液化燃料ガス気化装置に関する。   The present invention relates to a storage tank for storing a liquid heat medium, a heating means for heating the heat medium in the storage tank, and a liquefied fuel gas provided in the storage tank by heat exchange with the heat medium. A plurality of vaporizers each having a heat transfer tube that vaporizes and delivers the fuel gas is provided, and an operation state in which the liquefied fuel gas flows through each of the vaporizers in the plurality of systems and the liquefied fuel gas flow. An operation state switching means for switching to a standby state that does not flow is provided, and a part of the plurality of carburetors is in the operation state and the rest is in the standby state, and each of the plurality of carburetors is In order to switch between the operating state and the standby state, a liquefied fuel gas vaporizer provided with control means for controlling the operation of the operating state switching means, a storage tank for storing a liquid heat medium, and heat in the storage tank Heating the medium A vaporizer is provided that includes heating means and a heat transfer pipe that is disposed in the storage tank and vaporizes the supplied liquefied fuel gas by heat exchange with the heat medium to send the fuel gas, An operation state switching means for switching the vaporizer between an operation state in which the liquefied fuel gas is allowed to flow and a standby state in which the liquefied fuel gas is not allowed to flow; and the operation for switching the vaporizer between the operation state and the standby state. The present invention relates to a liquefied fuel gas vaporizer provided with control means for controlling operation of a state switching means.

かかる液化燃料ガス気化装置は、例えば、燃料ガスの導管が敷設されていない地域の需要家に燃料ガスを供給するいわゆるサテライト基地にて使用されるものであり、ＬＮＧ（液化天然ガス）等の液化燃料ガスを液化燃料ガス貯槽にて貯留しておき、その液化燃料ガス貯槽から供給される液化燃料ガスを気化器にて気化して、天然ガス等の燃料ガスを需要家に供給するようになっている（例えば、特許文献１参照。）。   Such a liquefied fuel gas vaporizer is used, for example, at a so-called satellite base for supplying fuel gas to a consumer in an area where a fuel gas conduit is not installed, and liquefied LNG (liquefied natural gas) or the like. Fuel gas is stored in a liquefied fuel gas storage tank, the liquefied fuel gas supplied from the liquefied fuel gas storage tank is vaporized by a vaporizer, and fuel gas such as natural gas is supplied to consumers. (For example, refer to Patent Document 1).

上記特許文献１には記載されていないが、気化器においては、加熱手段により貯槽内の熱媒体を加熱する状態で、伝熱管を通して液化燃料ガスを通流させることにより、液化燃料ガスを熱媒体との熱交換により気化させて燃料ガスを送出するようになっている。   Although not described in the above-mentioned Patent Document 1, in the vaporizer, the liquefied fuel gas is caused to flow through the heat transfer tube while the liquefied fuel gas is flowed through the heat transfer tube while the heating medium is heated by the heating means. The fuel gas is sent out after being vaporized by heat exchange.

又、このような液化燃料ガス気化装置では、燃料ガスの供給能力を所望の能力以上に維持できるようにするためや、メンテナンスや故障等、気化器を停止させなくてはならない事態が発生しても需要家に継続して燃料ガスを供給できるようにするために、上述のような気化器が複数系統設けられて、それら複数系統の気化器を各別に液化燃料ガスを通流させる運転状態と液化燃料ガスを通流させない待機状態とに切り換える運転状態切換手段が設けられる場合がある。
そして、複数系統の気化器のうちの一部が運転状態となり残りが待機状態となる形態で、複数系統の気化器夫々を運転状態と待機状態とに切り換えるべく、制御手段により運転状態切換手段の作動を制御するように構成されている。 In addition, in such a liquefied fuel gas vaporizer, there is a situation where the vaporizer must be stopped in order to maintain the fuel gas supply capacity beyond the desired capacity, or for maintenance or failure. In order to continuously supply fuel gas to consumers, a plurality of carburetors as described above are provided, and an operating state in which the liquefied fuel gas flows through each of the plurality of carburetors, and There may be provided an operation state switching means for switching to a standby state in which the liquefied fuel gas is not allowed to flow.
Then, in a form in which some of the carburetors in the plurality of systems are in the operating state and the rest are in the standby state, the control means switches the operation state switching means to switch each of the carburetors in the plurality of systems between the operating state and the standby state. It is configured to control operation.

つまり、複数系統の気化器のうちの一部の気化器を運転して、気化器に液化燃料ガスを通流させて気化させることにより、需要家に燃料ガスを供給するようにし、残りの気化器は液化燃料ガスを通流させないようにして待機させておき、燃料ガスの供給能力維持、メンテナンスや故障等により、運転中の気化器を停止させる必要が生じたときには、運転中の気化器を停止させるのに合わせて待機中の気化器を運転するようにして、運転する気化器を切り換えることにより、中断することなく需要家に燃料ガスを供給できるようになっている。   In other words, by operating some of the carburetors of the multiple systems and passing the liquefied fuel gas through the carburetor for vaporization, the fuel gas is supplied to the consumer and the remaining vaporizers are supplied. The carburetor is kept in a standby state so that the liquefied fuel gas is not allowed to flow, and when it is necessary to stop the carburetor during operation due to maintenance of fuel gas supply capacity, maintenance or failure, etc. By switching the carburetor to be operated by operating the carburetor on standby in accordance with the stoppage, the fuel gas can be supplied to the consumer without interruption.

又、気化器が１系統設けられる場合は、気化器を運転状態と待機状態とに切り換えるべく、制御手段により運転状態切換手段の作動を制御するように構成されて、燃料ガスの供給を要求されるときに、気化器が運転されるようになっている。   When one carburetor is provided, the control means controls the operation of the operation state switching means to switch the carburetor between the operation state and the standby state, and the supply of fuel gas is required. When the carburetor is operating, the vaporizer is operated.

そして、このような液化燃料ガス気化装置においては、通常は、無駄なエネルギーを消費しないために、運転状態切換手段により待機状態に切り換えられている気化器の加熱手段については、気化器が待機状態に切り換えられている間中、その加熱作動が停止されることになる。   In such a liquefied fuel gas vaporizer, normally, the vaporizer is in a standby state with respect to the heating means of the vaporizer that is switched to the standby state by the operation state switching means in order not to consume useless energy. During this time, the heating operation is stopped.

特開２００６−２９３５６号公報（段落〔０００４〕、図６）JP 2006-29356 A (paragraph [0004], FIG. 6)

ところで、運転状態切換手段により運転する気化器を切り換えるに当たって、運転状態の気化器が待機状態に切り換えられると、伝熱管に液化燃料ガスが残留し、一方、待機状態の気化器が運転状態に切り換えられると、待機状態のときに伝熱管に残留していた液化燃料ガスが新たに気化器に供給される液化燃料ガスよりも先に気化されて需要家に供給されることなる。
そして、液化燃料ガスには、沸点が異なる複数の成分からなる組成のものがあり、そのような液化燃料ガスでは沸点の高い成分ほど気化し難いものである。 By the way, when switching the carburetor to be operated by the operation state switching means, if the carburetor in the operation state is switched to the standby state, the liquefied fuel gas remains in the heat transfer tube, while the carburetor in the standby state is switched to the operation state. Then, the liquefied fuel gas remaining in the heat transfer tube in the standby state is vaporized earlier than the liquefied fuel gas newly supplied to the vaporizer and supplied to the consumer.
There are liquefied fuel gases having a composition composed of a plurality of components having different boiling points. In such a liquefied fuel gas, components having higher boiling points are more difficult to vaporize.

ところが、従来の液化燃料ガス気化装置では、運転状態の気化器が待機状態に切り換えられると、加熱手段の加熱作動が停止されるので、気化器が待機状態になっている間に、貯槽内の熱媒体の温度が徐々に低下することになり、特に、対流により、貯槽内の底部側の熱媒体ほど温度が低くなる。
従って、貯槽内の底部側の熱媒体の温度が、液化燃料ガスのうちの沸点の高い成分が気化し難いあるいは気化しないような温度にまで低下すると、気化器に残留している液化燃料ガスのうちの沸点の高い成分が気化し難くなるので、気化器に残留している液化燃料ガスの組成が変動する場合がある。 However, in the conventional liquefied fuel gas vaporizer, when the vaporizer in the operating state is switched to the standby state, the heating operation of the heating means is stopped, so that while the vaporizer is in the standby state, The temperature of the heat medium is gradually lowered, and in particular, the temperature of the heat medium on the bottom side in the storage tank becomes lower due to convection.
Accordingly, when the temperature of the heat medium on the bottom side in the storage tank is lowered to a temperature at which a component having a high boiling point in the liquefied fuel gas is difficult to vaporize or does not vaporize, the liquefied fuel gas remaining in the vaporizer is reduced. Since the component having a high boiling point is difficult to vaporize, the composition of the liquefied fuel gas remaining in the vaporizer may vary.

例えば、ＬＮＧの組成は、メタン（例えば９０．３８ｍｏｌ％）、エタン（例えば４．５５ｍｏｌ％）、プロパン（例えば３．３１ｍｏｌ％）、ブタン（例えば１．６７ｍｏｌ％）等を含む組成であり、待機中は、沸点が低いメタン（沸点：−１６１．５℃）やエタン（沸点：−８９℃）のいわゆる軽質成分に比べて、沸点が高いプロパン（沸点：−４２．１度）やブタン（沸点：−０．５℃）のいわゆる重質成分は気化し難いので、気化器が待機状態になっている間に、気化器に残留している液化燃料ガスの組成が重質成分の組成比が大きい組成に変動する場合がある。   For example, the composition of LNG is a composition containing methane (for example, 90.38 mol%), ethane (for example, 4.55 mol%), propane (for example, 3.31 mol%), butane (for example, 1.67 mol%), and the like. Among them, propane (boiling point: −42.1 degrees) and butane (boiling point) having a high boiling point compared to so-called light components such as methane (boiling point: −161.5 ° C.) and ethane (boiling point: −89 ° C.) having a low boiling point. : -0.5 ° C) so-called heavy components are difficult to vaporize, so the composition of the liquefied fuel gas remaining in the vaporizer is in the standby state while the vaporizer is in the standby state. May vary to large composition.

そして、このように気化器が待機状態になっている間にその気化器に残留している液化燃料ガスの組成が変動していると、気化器が運転状態に切り換えられる際には、組成が変動している残留液化燃料ガスが先に気化されて需要家に供給されるので、需要家に供給される燃料ガスの熱量が変動することになる。
このように気化器が待機状態から運転状態に切り換えられる際の供給燃料ガスの熱量変動は、気化器が複数系統設けられる場合、及び、１系統設けられる場合のいずれにおいても起こるものであり、気化器が待機状態から運転状態に切り換えられる際の需要家に供給される燃料ガスの熱量が変動するのを抑制する上で改善の余地があった。 If the composition of the liquefied fuel gas remaining in the vaporizer changes while the vaporizer is in the standby state, the composition is changed when the vaporizer is switched to the operating state. Since the fluctuating residual liquefied fuel gas is first vaporized and supplied to the consumer, the amount of heat of the fuel gas supplied to the consumer fluctuates.
As described above, the change in the calorific value of the supplied fuel gas when the carburetor is switched from the standby state to the operating state occurs both when the carburetor is provided with a plurality of systems and when the carburetor is provided with one system. There is room for improvement in suppressing fluctuations in the amount of heat of the fuel gas supplied to the consumer when the vessel is switched from the standby state to the operating state.

本発明は、かかる実情に鑑みてなされたものであり、その目的は、気化器が待機状態から運転状態に切り換えられる際の供給燃料ガスの熱量変動を抑制し得る液化燃料ガス気化装置を提供することにある。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a liquefied fuel gas vaporizer that can suppress fluctuations in the amount of heat of supplied fuel gas when the vaporizer is switched from a standby state to an operating state. There is.

上記目的を達成するための本発明に係る液化燃料ガス気化装置は、液状の熱媒体を貯留する貯槽と、その貯槽内の熱媒体を加熱する加熱手段と、その貯槽内に配設されて、供給される液化燃料ガスを熱媒体との熱交換により気化して燃料ガスを送出する伝熱管とを備えて構成された気化器が、複数系統設けられ、それら複数系統の気化器を各別に液化燃料ガスを通流させる運転状態と液化燃料ガスを通流させない待機状態とに切り換える運転状態切換手段が設けられ、前記複数系統の気化器のうちの一部が前記運転状態となり残りが前記待機状態となる形態で、前記複数系統の気化器夫々を前記運転状態と前記待機状態とに切り換えるべく、前記運転状態切換手段の作動を制御する制御手段が設けられたものであって、
その特徴構成は、前記複数系統の気化器夫々に、前記貯槽内の熱媒体を攪拌する攪拌作動を行う攪拌手段が設けられ、
前記制御手段が、前記運転状態切換手段により前記待機状態に切り換えている気化器の攪拌手段を攪拌作動させるように構成されている点にある。 A liquefied fuel gas vaporizer according to the present invention for achieving the above object is provided with a storage tank for storing a liquid heat medium, heating means for heating the heat medium in the storage tank, and the storage tank. A plurality of vaporizers are provided with a heat transfer tube that vaporizes the supplied liquefied fuel gas by heat exchange with the heat medium and delivers the fuel gas, and liquefies the multiple vaporizers separately. An operation state switching means for switching between an operation state in which the fuel gas is allowed to flow and a standby state in which the liquefied fuel gas is not allowed to flow is provided, and a part of the carburetors in the plurality of systems become the operation state and the rest become the standby state. In the form, in order to switch the carburetors of the plurality of systems to the operation state and the standby state, there is provided a control means for controlling the operation of the operation state switching means,
The characteristic configuration is provided with a stirring means for performing a stirring operation for stirring the heat medium in the storage tank in each of the plurality of vaporizers,
The control means is configured to agitate the stirring means of the vaporizer that is switched to the standby state by the operating state switching means.

上記特徴構成によれば、運転状態切換手段により待機状態に切り換えられている気化器の攪拌手段が攪拌作動されて、その気化器の貯槽内の熱媒体が攪拌されるので、待機状態の気化器の貯槽内における上下方向での熱媒体の温度差を抑制することができる。
これにより、待機状態の気化器に残留している液化燃料ガスのうちの沸点の高い成分が先に気化し難くなるといった状況になるのを抑制することが可能となるので、気化器が待機状態になっている間に、その気化器に残留している液化燃料ガスの組成が変動するのを抑制することが可能となる。
従って、気化器が待機状態から運転状態に切り換えられる際の供給燃料ガスの熱量変動を抑制し得る液化燃料ガス気化装置を提供することができるようになった。 According to the above characteristic configuration, the agitator of the carburetor that has been switched to the standby state by the operating state switching unit is agitated, and the heat medium in the storage tank of the vaporizer is agitated. The temperature difference of the heat medium in the vertical direction in the storage tank can be suppressed.
As a result, it is possible to suppress a situation in which a component having a high boiling point out of the liquefied fuel gas remaining in the vaporizer in the standby state is difficult to vaporize first, so that the vaporizer is in the standby state. During this time, it is possible to suppress fluctuations in the composition of the liquefied fuel gas remaining in the vaporizer.
Accordingly, it is possible to provide a liquefied fuel gas vaporizer that can suppress fluctuations in the calorific value of the supplied fuel gas when the vaporizer is switched from the standby state to the operating state.

上記目的を達成するための本発明に係る液化燃料ガス気化装置は、液状の熱媒体を貯留する貯槽と、その貯槽内の熱媒体を加熱する加熱手段と、その貯槽内に配設されて、供給される液化燃料ガスを熱媒体との熱交換により気化して燃料ガスを送出する伝熱管とを備えて構成された気化器が設けられ、その気化器を液化燃料ガスを通流させる運転状態と液化燃料ガスを通流させない待機状態とに切り換える運転状態切換手段と、前記気化器を前記運転状態と前記待機状態とに切り換えるべく、前記運転状態切換手段の作動を制御する制御手段とが設けられたものであって、
その特徴構成は、前記気化器に、前記貯槽内の熱媒体を攪拌する攪拌作動を行う攪拌手段が設けられ、
前記制御手段が、前記運転状態切換手段により前記気化器を前記待機状態に切り換えている間において、前記攪拌手段を攪拌作動させるように構成されている点にある。 A liquefied fuel gas vaporizer according to the present invention for achieving the above object is provided with a storage tank for storing a liquid heat medium, heating means for heating the heat medium in the storage tank, and the storage tank. An operating state in which a carburetor configured to vaporize the supplied liquefied fuel gas by heat exchange with a heat medium and deliver the fuel gas is provided, and the liquefied fuel gas flows through the vaporizer And an operation state switching means for switching to a standby state in which the liquefied fuel gas does not flow, and a control means for controlling the operation of the operation state switching means to switch the vaporizer between the operation state and the standby state. It was
The characteristic configuration is that the vaporizer is provided with stirring means for performing a stirring operation for stirring the heat medium in the storage tank,
The control means is configured to agitate the stirring means while the vaporizer is switched to the standby state by the operating state switching means.

上記特徴構成によれば、運転状態切換手段により気化器が待機状態に切り換えられている間において、攪拌手段が攪拌作動されて、気化器の貯槽内の熱媒体が攪拌されるので、待機状態の気化器の貯槽内における上下方向での熱媒体の温度差を抑制することができる。
これにより、待機状態の気化器に残留している液化燃料ガスのうちの沸点の高い成分が先に気化し難くなるといった状況になるのを抑制することが可能となるので、気化器が待機状態になっている間に、その気化器に残留している液化燃料ガスの組成が変動するのを抑制することが可能となる。
従って、気化器が待機状態から運転状態に切り換えられる際の供給燃料ガスの熱量変動を抑制し得る液化燃料ガス気化装置を提供することができるようになった。 According to the above characteristic configuration, while the vaporizer is switched to the standby state by the operation state switching unit, the stirring unit is agitated and the heat medium in the vaporizer storage tank is agitated. The temperature difference of the heat medium in the vertical direction in the storage tank of the vaporizer can be suppressed.
As a result, it is possible to suppress a situation in which a component having a high boiling point out of the liquefied fuel gas remaining in the vaporizer in the standby state is difficult to vaporize first, so that the vaporizer is in the standby state. During this time, it is possible to suppress fluctuations in the composition of the liquefied fuel gas remaining in the vaporizer.
Accordingly, it is possible to provide a liquefied fuel gas vaporizer that can suppress fluctuations in the calorific value of the supplied fuel gas when the vaporizer is switched from the standby state to the operating state.

本発明に係る液化燃料ガス気化装置の更なる特徴構成は、前記制御手段が、前記運転状態切換手段により前記気化器を前記待機状態に切り換えている間において、設定時間が経過する毎に、又は、前記貯槽内の下部の熱媒体の温度が設定温度以下になると、当該気化器の攪拌手段を攪拌作動させるように構成されている点にある。   A further characteristic configuration of the liquefied fuel gas vaporizer according to the present invention is that the control unit switches the vaporizer to the standby state by the operation state switching unit, every time a set time elapses, or When the temperature of the heat medium in the lower part in the storage tank becomes equal to or lower than the set temperature, the stirring means of the vaporizer is configured to be stirred.

上記特徴構成によれば、運転状態切換手段により気化器が待機状態に切り換えられている間において、設定時間が経過する毎に、又は、貯槽内の下部の熱媒体の温度が設定温度以下になると、待機状態の気化器の攪拌手段が攪拌作動されて、その気化器の貯槽内の熱媒体が攪拌される。
つまり、気化器が待機状態に切り換えられている間において、その気化器の貯槽内の熱媒体が攪拌手段により攪拌されずに放置される時間が長くなるほど、対流に伴う貯槽内の上下方向での熱媒体の温度差が大きくなる。
そこで、前記設定時間を、例えば、対流に伴う貯槽内の上下方向での熱媒体の温度差を所定の範囲に抑えることが可能な時間に設定して、その設定時間が経過する毎に、攪拌手段を攪拌作動するように構成する。
あるいは、前記設定温度として、液化燃料ガスのうちの沸点の高い成分が気化し難くなるような温度よりも高い温度に設定して、貯槽内の下部の熱媒体の温度が設定温度以下になると、攪拌手段を攪拌作動するように構成する。
このように構成すると、待機状態の気化器に残留している液化燃料ガスの組成変動を抑制すべく、待機状態の気化器の攪拌手段を攪拌作動させるにしても、その攪拌作動時間を短縮することができる。
従って、ランニングコストを低減しながら、気化器が待機状態から運転状態に切り換えられる際の供給燃料ガスの熱量変動を抑制することができるようになった。 According to the above characteristic configuration, while the carburetor is switched to the standby state by the operating state switching means, every time the set time elapses or when the temperature of the lower heating medium in the storage tank becomes equal to or lower than the set temperature. The agitating means of the vaporizer in the standby state is agitated, and the heat medium in the storage tank of the vaporizer is agitated.
In other words, while the vaporizer is switched to the standby state, the longer the time that the heat medium in the vaporizer storage tank is left unstirred by the stirring means, the longer the vertical direction in the storage tank due to convection. The temperature difference of the heat medium increases.
Therefore, for example, the set time is set to a time during which the temperature difference of the heat medium in the vertical direction in the storage tank accompanying convection can be suppressed within a predetermined range, and stirring is performed every time the set time elapses. The means is configured to agitate.
Alternatively, the set temperature is set to a temperature higher than the temperature at which a component having a high boiling point in the liquefied fuel gas is less likely to be vaporized, and the temperature of the lower heating medium in the storage tank is equal to or lower than the set temperature. The stirring means is configured to perform a stirring operation.
With this configuration, even if the agitating means of the carburetor in the standby state is agitated to suppress the composition fluctuation of the liquefied fuel gas remaining in the carburetor in the standby state, the agitation operation time is shortened. be able to.
Therefore, it is possible to suppress fluctuations in the amount of heat of the supplied fuel gas when the carburetor is switched from the standby state to the operating state while reducing the running cost.

本発明に係る液化燃料ガス気化装置の更なる特徴構成は、前記加熱手段が、当該加熱手段を備えた気化器が前記運転状態切換手段により前記待機状態に切り換えられている間においても、加熱作動を行うように構成されている点にある。   A further characteristic configuration of the liquefied fuel gas vaporizer according to the present invention is that the heating means is operated even while the vaporizer equipped with the heating means is switched to the standby state by the operating state switching means. It is in the point where it is constituted to perform.

上記特徴構成によれば、運転状態切換手段により待機状態に切り換えられている気化器の加熱手段が、加熱作動されることから、攪拌手段の攪拌作動との協働により、待機状態の気化器に残留している液化燃料ガスのうちの沸点の高い成分が気化し難くなるといった状況になるのを的確に回避することができるので、気化器が待機状態になっている間に、その気化器に残留している液化燃料ガスの組成が変動するのをより一層抑制することができる。
ここで、待機状態の気化器の加熱手段を加熱作動させるにしても、液化燃料ガスのうちの沸点の高い成分が気化し難くなる温度にまで貯槽内の熱媒体の温度が低下するのを回避できるように加熱作動させれば十分であるので、待機状態の気化器の加熱手段を加熱作動させるにしても、エネルギー消費量が増加するのを抑制することができる。
従って、気化器が待機状態から運転状態に切り換えられる際の供給燃料ガスの熱量変動をより一層抑制することができるようになった。 According to the above characteristic configuration, since the heating unit of the vaporizer that has been switched to the standby state by the operation state switching unit is heated, the vaporizer in the standby state is combined with the stirring operation of the stirring unit. Since it is possible to accurately avoid the situation in which the component with a high boiling point of the remaining liquefied fuel gas becomes difficult to vaporize, the vaporizer is kept in the vaporizer while it is in the standby state. It is possible to further suppress fluctuations in the composition of the remaining liquefied fuel gas.
Here, even if the heating means of the vaporizer in the standby state is heated, the temperature of the heat medium in the storage tank is prevented from lowering to a temperature at which the component having a high boiling point in the liquefied fuel gas is difficult to vaporize. Since it is sufficient to perform the heating operation so as to be able to perform, even if the heating means of the vaporizer in the standby state is heated, the increase in energy consumption can be suppressed.
Therefore, it is possible to further suppress the variation in the amount of heat of the supplied fuel gas when the carburetor is switched from the standby state to the operating state.

本発明に係る液化燃料ガス気化装置の更なる特徴構成は、前記加熱手段が、前記貯槽内に加熱媒体としての蒸気を噴出する蒸気噴出部と、その蒸気噴出部からの蒸気の噴出を断続する噴出断続手段とを備えて、前記蒸気噴出部による蒸気の噴出により前記貯槽内の熱媒体を加熱するのに合わせて攪拌するように構成されて、前記加熱手段が前記攪拌手段に兼用されている点にある。   According to a further characteristic configuration of the liquefied fuel gas vaporizer according to the present invention, the heating means intermittently ejects steam from the steam ejection section that ejects steam as a heating medium into the storage tank, and the steam ejection section. And a jetting intermittent means, and configured to stir in accordance with heating of the heat medium in the storage tank by jetting of steam from the steam jetting part, and the heating means is also used as the stirring means In the point.

上記特徴構成によれば、貯槽内に設けられた蒸気噴出部により、加熱媒体としての蒸気が貯槽内に噴出されると、その噴出蒸気により、貯槽内の熱媒体が加熱されるのに合わせて攪拌される。
つまり、加熱手段を蒸気噴出部とその蒸気噴出部からの蒸気の噴出を断続する噴出断続手段とを備えて構成すると、その加熱手段を攪拌手段に兼用することができるので、構成の簡略化を図ることができる。
従って、気化器が待機状態から運転状態に切り換えられる際の供給燃料ガスの熱量変動を抑制し得る液化燃料ガス気化装置を低廉化することができるようになった。 According to the above characteristic configuration, when the steam as the heating medium is ejected into the storage tank by the steam ejection section provided in the storage tank, the thermal medium in the storage tank is heated by the ejected steam. Stir.
That is, if the heating means is configured to include the steam ejection part and the ejection intermittent means for intermittently ejecting the steam from the steam ejection part, the heating means can be used as the agitation means. Can be planned.
Accordingly, it is possible to reduce the cost of the liquefied fuel gas vaporizer that can suppress the fluctuation of the calorific value of the supplied fuel gas when the vaporizer is switched from the standby state to the operating state.

本発明に係る液化燃料ガス気化装置の更なる特徴構成は、前記貯槽が有底円筒状であり、
前記蒸気噴出部が、前記有底円筒状の貯槽内の下部における内周面の近傍から、前記貯槽の内周面に沿って周方向に向けて蒸気を噴出するように設けられている点にある。 According to a further feature of the liquefied fuel gas vaporizer according to the present invention, the storage tank has a bottomed cylindrical shape,
The steam ejection part is provided so as to eject steam in the circumferential direction along the inner peripheral surface of the storage tank from the vicinity of the inner peripheral surface in the lower part of the bottomed cylindrical storage tank. is there.

上記特徴構成によれば、蒸気噴出部により、有底円筒状の貯槽内の下部における内周面の近傍から、その貯槽の内周面に沿って周方向に向けて蒸気が噴出されることにより、貯槽内を熱媒体が下方から上方に向けて旋回状態で流動するので、貯槽内の熱媒体が一層良好に攪拌されることになって、貯槽内の上下方向での熱媒体の温度差を一層小さくすることができる。
これにより、待機状態の気化器に残留している液化燃料ガスのうちの沸点の高い成分が先に気化し難くなるといった状況になるのをより一層抑制することが可能となるので、気化器が待機状態になっている間に、その気化器に残留している液化燃料ガスの組成が変動するのをより一層抑制することが可能となる。
従って、気化器が待機状態から運転状態に切り換えられる際の供給燃料ガスの熱量変動をより一層抑制することができる。 According to the above characteristic configuration, the steam is ejected from the vicinity of the inner peripheral surface of the bottom of the bottomed cylindrical storage tank toward the circumferential direction along the inner peripheral surface of the storage tank. The heat medium in the storage tank flows in a swirling state from the bottom to the top, so that the heat medium in the storage tank is further agitated, and the temperature difference of the heat medium in the vertical direction in the storage tank is reduced. It can be made even smaller.
As a result, it becomes possible to further suppress the situation in which the component having a high boiling point of the liquefied fuel gas remaining in the vaporizer in the standby state becomes difficult to vaporize first, so that the vaporizer While in the standby state, it is possible to further suppress fluctuations in the composition of the liquefied fuel gas remaining in the vaporizer.
Accordingly, it is possible to further suppress the heat amount fluctuation of the supplied fuel gas when the carburetor is switched from the standby state to the operating state.

第１実施形態にかかる液化燃料ガス気化装置のフロー図Flow diagram of the liquefied fuel gas vaporizer according to the first embodiment 第１実施形態にかかる液化燃料ガス気化装置の気化器の斜視図The perspective view of the vaporizer | carburetor of the liquefied fuel gas vaporizer concerning 1st Embodiment. 第１実施形態に係る液化燃料ガス気化装置の制御動作のタイムチャートを示す図The figure which shows the time chart of control operation | movement of the liquefied fuel gas vaporization apparatus which concerns on 1st Embodiment. 第２実施形態にかかる液化燃料ガス気化装置のフロー図Flow diagram of the liquefied fuel gas vaporizer according to the second embodiment

以下、図面に基づいて、本発明の実施形態を説明する。
〔第１実施形態〕
先ず、第１実施形態を説明する。
図１に示すように、液化燃料ガス気化装置は、液化燃料ガスＧを貯留する液化燃料ガス貯槽１と、その液化燃料ガス貯槽１から供給される液化燃料ガスＧを気化して需要家（図示省略）に供給する２系統の気化器Ｖと、この液化燃料ガス気化装置の運転を制御する制御部２（制御手段に相当する）と、その制御部２に各種制御指令を指令する操作部３等を備えて構成されている。
ちなみに、この実施形態では、液化燃料ガス貯槽１には液化燃料ガスＧとしてＬＮＧ（液化天然ガス）が貯留され、各需要家には燃料ガスＧとして天然ガスが供給される。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, the first embodiment will be described.
As shown in FIG. 1, the liquefied fuel gas vaporizer is configured to vaporize the liquefied fuel gas storage tank 1 for storing the liquefied fuel gas G, and the liquefied fuel gas G supplied from the liquefied fuel gas storage tank 1 to consumers (illustrated). 2) the carburetor V supplied to the control unit 2, a control unit 2 (corresponding to control means) for controlling the operation of the liquefied fuel gas vaporizer, and an operation unit 3 for instructing the control unit 2 with various control commands. Etc. are provided.
Incidentally, in this embodiment, LNG (liquefied natural gas) is stored in the liquefied fuel gas storage tank 1 as the liquefied fuel gas G, and natural gas is supplied to each consumer as the fuel gas G.

図２にも示すように、各気化器Ｖは、湯水Ｗ（液状の熱媒体に相当する）を貯留する貯水槽４（貯槽に相当する）と、その貯水槽４内の湯水を加熱する加熱手段Ｈと、その貯槽水４内に配設されて、供給される液化燃料ガスＧを湯水Ｗとの熱交換により気化して燃料ガスＧを送出する伝熱管５とを備えて構成されている。
貯水槽４は、有底円筒状であり、その有底円筒状の貯水槽４内に、コイル状の前記伝熱管５がコイル軸心を上下方向に向けた姿勢で1個あるいは複数個配設されている。 As shown in FIG. 2, each vaporizer V includes a water storage tank 4 (corresponding to a storage tank) that stores hot water W (corresponding to a liquid heat medium) and heating that heats the hot water in the water storage tank 4. Means H and a heat transfer tube 5 disposed in the storage tank water 4 and vaporizing the supplied liquefied fuel gas G by exchanging heat with the hot water W to deliver the fuel gas G are provided. .
The water storage tank 4 has a bottomed cylindrical shape, and one or a plurality of the coiled heat transfer tubes 5 are disposed in the bottomed cylindrical water storage tank 4 with the coil axis oriented in the vertical direction. Has been.

２系統の気化器Ｖの伝熱管５における下方の入口部の夫々には、液化燃料ガス貯槽１から液化燃料ガスが送出される元供給路６に並列接続された２系統の液化燃料ガス供給路７夫々が接続され、２系統の気化器Ｖの伝熱管５における上方の出口部の夫々には、燃料ガス送出路８が夫々接続され、これら２系統の燃料ガス送出路８は、合流送出路９に接続されて、この合流送出路９を通して燃料ガスＧが各需要家に対して送出される。   Two liquefied fuel gas supply paths connected in parallel to the original supply path 6 through which the liquefied fuel gas is sent from the liquefied fuel gas storage tank 1 are respectively provided at the lower inlet portions of the heat transfer tubes 5 of the two carburetors V. 7 are connected to each of the upper outlets of the heat transfer tubes 5 of the two vaporizers V, and the fuel gas delivery path 8 is connected to each of the two systems. 9, the fuel gas G is sent to each consumer through this merging delivery path 9.

元供給路６には、２系統の気化器Ｖへの液化燃料ガスＧの供給を一括して断続する元開閉弁１０が設けられている。
又、２系統の液化燃料ガス供給路７夫々には、運転切換用開閉弁１１が設けられている。
この運転切換用開閉弁１１を開閉することにより、気化器Ｖへ液化燃料ガスＧを通流させる運転状態と液化燃料ガスＧを通流させない待機状態とに気化器Ｖの運転状態を切り換えることができる。
つまり、２系統の液化燃料ガス供給路７に夫々設けられた２系統の運転切換用開閉弁１１により、２系統の気化器Ｖを各別に液化燃料ガスＧを通流させる運転状態と液化燃料ガスＧを通流させない待機状態とに切り換える運転状態切換手段Ｃが構成されることになる。
尚、以下の説明及び図面においては、２系統の気化器Ｖを区別するために、一方をＡ系統と称し、他方をＢ系統と称して、気化器を示す符号「Ｖ」に夫々添え字「ａ」、「ｂ」を付す。 The main supply path 6 is provided with a main opening / closing valve 10 for intermittently supplying the liquefied fuel gas G to the two carburetors V.
An operation switching on-off valve 11 is provided in each of the two liquefied fuel gas supply paths 7.
By opening and closing the operation switching on-off valve 11, the operation state of the carburetor V can be switched between an operation state in which the liquefied fuel gas G is allowed to flow to the vaporizer V and a standby state in which the liquefied fuel gas G is not allowed to flow. it can.
That is, the operation state and the liquefied fuel gas in which the liquefied fuel gas G is allowed to flow through the two carburetors V by the two systems of the operation switching on / off valves 11 provided in the two liquefied fuel gas supply paths 7 respectively. Operation state switching means C for switching to a standby state in which G is not allowed to flow is configured.
In the following description and drawings, in order to distinguish the two carburetors V, one is referred to as the A system and the other is referred to as the B system. a ”and“ b ”are attached.

図１及び図２に示すように、本発明では、２系統の気化器Ｖ夫々に、貯水槽４内の湯水Ｗを攪拌する攪拌作動を行う攪拌手段Ｍが設けられている。
この実施形態では、加熱手段Ｈが、貯水槽４内に加熱媒体としての蒸気Ｓを噴出する蒸気噴出部１２と、その蒸気噴出部１２からの蒸気Ｓの噴出を断続する噴出断続手段としての蒸気用開閉弁１３とを備えて、蒸気噴出部１２による蒸気Ｓの噴出により貯水槽４内の湯水Ｗを加熱するのに合わせて攪拌するように構成されて、加熱手段Ｈが攪拌手段Ｍに兼用されている。
更に、蒸気噴出部１２が、有底円筒状の貯水槽４内の下部における内周面の近傍から、貯水槽４の内周面に沿って周方向に向けて蒸気Ｓを噴出するように設けられている。
２系統の蒸気噴出部１２夫々は、ボイラ１４から蒸気Ｓが送出される２系統の蒸気供給路１５夫々に接続され、各蒸気供給路１５に前記蒸気用開閉弁１３が設けられている。 As shown in FIGS. 1 and 2, in the present invention, each of the two vaporizers V is provided with a stirring means M that performs a stirring operation for stirring the hot water W in the water storage tank 4.
In this embodiment, the heating means H is a steam ejection section 12 that ejects steam S as a heating medium into the water storage tank 4, and steam as ejection intermittent means that intermittently ejects the steam S from the steam ejection section 12. And an opening / closing valve 13 for stirring the hot water W in the water storage tank 4 by the jetting of the steam S by the steam jetting part 12. The heating means H is also used as the stirring means M. Has been.
Furthermore, the steam ejection part 12 is provided so as to eject steam S in the circumferential direction along the inner peripheral surface of the water storage tank 4 from the vicinity of the inner peripheral surface in the lower part of the bottomed cylindrical water storage tank 4. It has been.
Each of the two steam ejection sections 12 is connected to each of the two steam supply paths 15 through which the steam S is sent from the boiler 14, and the steam on-off valve 13 is provided in each steam supply path 15.

図１及び図２に示すように、伝熱管５の出口部には燃料ガスの温度を検出する気化ガス温度センサ１６が設けられている。
ところで、何らかの要因により気化器Ｖの気化能力が低下すると、伝熱管５の出口部の燃料ガスの温度が低下するので、気化ガス温度センサ１６の検出温度に基づいて、気化器Ｖの気化能力低下を検知することができる。
そこで、予め、気化能力低下を検知するための所定の気化能力低下検知用設定温度が設定されて、制御部２に記憶されている。そして、制御部２が、気化ガス温度センサ１６の検出温度が気化能力低下検知用設定温度よりも低くなると、運転する気化器Ｖを切り換える切換タイミングになったと判別するように構成されている。 As shown in FIGS. 1 and 2, a vaporized gas temperature sensor 16 that detects the temperature of the fuel gas is provided at the outlet of the heat transfer tube 5.
By the way, if the vaporization capacity of the vaporizer V decreases due to some factor, the temperature of the fuel gas at the outlet of the heat transfer tube 5 decreases, so the vaporization capacity of the vaporizer V decreases based on the temperature detected by the vaporized gas temperature sensor 16. Can be detected.
Therefore, a predetermined setting temperature for detecting a decrease in vaporization capacity for detecting a decrease in vaporization capacity is set in advance and stored in the control unit 2. And the control part 2 is comprised so that it may discriminate | determine that it became the switching timing which switches the vaporizer V to drive, if the detection temperature of the vaporization gas temperature sensor 16 becomes lower than the setting temperature for vaporization capability fall detection.

前記制御部２の制御動作について説明する。
制御部２は、運転する気化器Ｖを切り換える切換タイミングになると、２系統の気化器Ｖのうちの一方が運転状態となり他方が待機状態となる形態で、２系統の気化器Ｖ夫々を運転状態と待機状態とに切り換えるべく、２系統の運転切換用開閉弁１１の作動を制御するように構成されている。
そして、本発明では、制御部２が、運転切換用開閉弁１１により待機状態に切り換えている気化器Ｖの攪拌手段Ｍを攪拌作動させるように構成されている。 The control operation of the control unit 2 will be described.
At the switching timing for switching the carburetor V to be operated, the control unit 2 operates each of the two carburetors V in a state where one of the two carburetors V is in an operating state and the other is in a standby state. In order to switch to the standby state, the operation of the two operation switching on / off valves 11 is controlled.
And in this invention, the control part 2 is comprised so that the stirring means M of the vaporizer V currently switched to the standby state by the operation switching on-off valve 11 may be stirred.

この第１実施形態では、制御部２が、運転切換用開閉弁１１により気化器Ｖを待機状態に切り換えている間において、断続用設定時間（設定時間に相当する）Ｔｉが経過する毎に、当該気化器Ｖの攪拌手段Ｍを攪拌作動させるように構成されている。
つまり、加熱手段Ｈが攪拌手段Ｍに兼用されているので、加熱手段Ｈが、当該加熱手段Ｈを備えた気化器Ｖが運転切換用開閉弁１１により待機状態に切り換えられている間においても、加熱作動を行うように構成されている。 In the first embodiment, while the control unit 2 switches the vaporizer V to the standby state by the operation switching on-off valve 11, every time the intermittent setting time (corresponding to the set time) Ti elapses, The stirring means M of the vaporizer V is configured to be stirred.
That is, since the heating means H is also used as the stirring means M, the heating means H can be used while the vaporizer V equipped with the heating means H is switched to the standby state by the operation switching on-off valve 11. A heating operation is performed.

又、各気化器Ｖには貯水槽４内上部の湯水の温度を検出する上部湯水温度センサ１７が設けられている。
そして、制御部２は、運転切換用開閉弁１１により気化器Ｖを運転状態に切り換えている間、当該気化器Ｖの上部湯水温度センサ１７の検出温度が運転用設定温度になるように、当該気化器Ｖの加熱手段Ｈの加熱作動を制御するように構成されている。 Each vaporizer V is provided with an upper hot water temperature sensor 17 for detecting the temperature of hot water in the upper portion of the water storage tank 4.
And while the control part 2 is switching the vaporizer V into the driving | running state by the operation switching on-off valve 11, the said detection temperature of the upper hot-water temperature sensor 17 of the said vaporizer V becomes the setting temperature for driving | operation. It is configured to control the heating operation of the heating means H of the vaporizer V.

ちなみに、気化対象の液化燃料ガスがＬＮＧの場合、運転用設定温度は、例えば、５０℃に設定される。
又、前記断続用設定時間Ｔｉは、攪拌手段Ｍを作動させずに貯水槽４内の湯水を放置したときに、貯水槽４内の上部の湯水の温度が下限温度まで低下しない条件で、極力長い時間に設定される。
前記下限温度は、運転用設定温度よりも低く、しかも、液化燃料ガスに含まれる成分のうちで沸点の最も高い成分も十分に気化させることができる条件で、極力低い温度に設定される。気化対象の液化燃料ガスがＬＮＧの場合、下限温度は、例えば、１０℃に設定される。 Incidentally, when the liquefied fuel gas to be vaporized is LNG, the set temperature for operation is set to 50 ° C., for example.
The intermittent setting time Ti is as much as possible under the condition that the temperature of the hot water in the upper portion of the water storage tank 4 does not drop to the lower limit temperature when the hot water in the water storage tank 4 is left without operating the stirring means M. Set to a long time.
The lower limit temperature is set to a temperature that is as low as possible under the condition that the component having the highest boiling point among components contained in the liquefied fuel gas can be sufficiently vaporized. When the liquefied fuel gas to be vaporized is LNG, the lower limit temperature is set to 10 ° C., for example.

次に、図３に示すタイムチャートに基づいて、制御部２の制御動作について、説明を加える。但し、図３に示すタイムチャートでは、元開閉弁１０の制御動作については省略している。
制御部２は、操作部３から運転開始指令が指令されると、元開閉弁１０を開弁し、２系統の気化器Ｖのうち予め運転開始用気化器として定められているＡ系統の気化器Ｖａの運転切換用開閉弁１１を開弁して、Ａ系統の気化器Ｖａを運転状態に切り換え、並びに、Ｂ系統の気化器Ｖｂの運転切換用開閉弁１１を閉弁状態に維持して、Ｂ系統の気化器Ｖｂを待機状態に維持する。 Next, the control operation of the control unit 2 will be described based on the time chart shown in FIG. However, in the time chart shown in FIG. 3, the control operation of the original opening / closing valve 10 is omitted.
When the operation start command is instructed from the operation unit 3, the control unit 2 opens the original opening / closing valve 10, and the A system vaporization that is previously determined as the operation start carburetor among the two systems of the carburetor V is performed. The operation switching on / off valve 11 of the vaporizer Va is opened, the carburetor Va of the A system is switched to the operating state, and the operation switching on / off valve 11 of the carburetor Vb of the B system is maintained in the closed state. , B vaporizer Vb is maintained in a standby state.

制御部２は、このようにＡ系統の気化器Ｖａを運転状態に維持している間、そのＡ系統の上部湯水温度センサ１７の検出温度が運転用設定温度よりも設定温度以上低くなると、その検出温度が運転用設定温度よりも設定温度以上高くなるまでの間、Ａ系統の蒸気用開閉弁１３を開弁してＡ系統の加熱手段Ｈを加熱作動させ、並びに、断続用設定時間Ｔｉが経過する毎に、Ｂ系統の蒸気用開閉弁１３を攪拌用設定時間Ｔｍの間開弁して、Ｂ系統の攪拌手段Ｍを攪拌作動させると共にＢ系統の加熱手段Ｈを加熱作動させる。   When the control temperature of the upper hot water temperature sensor 17 of the A system becomes lower than the set temperature for operation while the carburetor Va of the A system is maintained in the operating state in this way, Until the detected temperature becomes higher than the set temperature for operation by a set temperature or more, the steam on-off valve 13 of the A system is opened to heat the heating means H of the A system, and the intermittent set time Ti is Every time, the steam on-off valve 13 of the B system is opened for the set time Tm for stirring, and the stirring means M for the B system is agitated and the heating means H for the B system is heated.

ちなみに、前記設定温度は、例えば１〜２℃程度に設定される。又、攪拌用設定時間Ｔｍは、断続用設定時間Ｔｉよりも短い時間に設定され、しかも、貯水槽４内の上下方向での湯水の温度差が十分に小さくなるように、蒸気噴出部１２からの蒸気噴出により貯水槽４内の湯水を攪拌することができる条件で、極力短い時間に設定される。   Incidentally, the set temperature is set to about 1 to 2 ° C., for example. Further, the set time Tm for stirring is set to a time shorter than the set time Ti for interrupting, and the steam jetting part 12 makes the temperature difference in the vertical direction in the water tank 4 sufficiently small. The time is set as short as possible under the condition that the hot water in the water storage tank 4 can be agitated by the jet of steam.

制御部２は、このようにＡ系統の気化器Ｖａを運転状態に維持している間は、Ａ系統の気化ガス温度センサ１６の検出温度を監視し、その検出温度が気化能力低下検知用設定温度よりも低くなって切換タイミングになったと判別する、Ａ系統の気化器Ｖａの運転切換用開閉弁１１を閉弁してＡ系統の気化器Ｖａを待機状態に切り換えると共に、Ａ系統の蒸気用開閉弁１３を閉弁してＡ系統の加熱手段Ｈの加熱作動を停止し、並びに、Ｂ系統の気化器Ｖｂの運転切換用開閉弁１１を開弁して、Ｂ系統の気化器Ｖｂを運転状態に切り換える。ちなみに、気化能力低下検知用設定温度は、運転用設定温度から前記設定温度減じた温度（加熱手段Ｈを加熱作動させる温度）よりも低い条件で、気化器Ｖの気化能力低下を的確に検知できる温度に設定される。   The control unit 2 monitors the detected temperature of the vaporized gas temperature sensor 16 of the A system while the vaporizer Va of the A system is maintained in the operating state as described above, and the detected temperature is the setting for detecting a decrease in vaporization ability. The operation switching on / off valve 11 of the A system carburetor Va, which is determined to be lower than the temperature and the switching timing, is closed to switch the A system carburetor Va to the standby state, and for the A system steam. The on / off valve 13 is closed to stop the heating operation of the heating means H of the A system, and the on / off valve 11 for switching the operation of the carburetor Vb of the B system is opened to operate the carburetor Vb of the B system. Switch to state. Incidentally, the set temperature for detecting the lowering of the vaporization capacity can accurately detect the lowering of the vaporization capacity of the vaporizer V under a condition lower than the temperature obtained by subtracting the set temperature from the set temperature for operation (the temperature at which the heating means H is heated). Set to temperature.

制御部２は、このようにＢ系統の気化器Ｖｂを運転状態に維持している間、そのＢ系統の上部湯水温度センサ１７の検出温度が運転用設定温度よりも設定温度以上低くなると、その検出温度が運転用設定温度よりも設定温度以上高くなるまでの間、Ｂ系統の蒸気用開閉弁１３を開弁してＢ系統の加熱手段Ｈを加熱作動させ、並びに、断続用設定時間Ｔｉが経過する毎に、Ａ系統の蒸気用開閉弁１３を攪拌用設定時間Ｔｍの間開弁して、Ａ系統の攪拌手段Ｍを攪拌作動させると共にＡ系統の加熱手段Ｈを加熱作動させる。   When the temperature detected by the upper hot water temperature sensor 17 of the B system becomes lower than the set temperature for operation while the carburetor Vb of the B system is maintained in the operating state in this way, Until the detected temperature becomes higher than the set temperature for operation by a set temperature or more, the steam on-off valve 13 for the B system is opened to heat the heating means H for the B system, and the intermittent set time Ti is Every time, the steam on-off valve 13 of the A system is opened for the set time Tm for stirring, and the stirring means M of the A system is stirred and the heating means H of the A system is heated.

制御部２は、このようにＢ系統の気化器Ｖｂを運転状態に維持している間は、Ｂ系統の気化ガス温度センサ１６の検出温度を監視し、その検出温度が気化能力低下検知用設定温度よりも低くなって切換タイミングになったと判別すると、Ｂ系統の気化器Ｖｂの運転切換用開閉弁１１を閉弁して、Ｂ系統の気化器Ｖｂを待機状態に切り換えると共に、Ｂ系統の蒸気用開閉弁１３を閉弁してＢ系統の加熱手段Ｈの加熱作動を停止し、並びに、Ａ系統の気化器Ｖａの運転切換用開閉弁１１を開弁して、Ａ系統の気化器Ｖａを運転状態に切り換える。   The control unit 2 monitors the detected temperature of the vaporized gas temperature sensor 16 of the B system while the vaporizer Vb of the B system is maintained in the operating state as described above, and the detected temperature is a setting for detecting a decrease in vaporization ability. If it becomes lower than the temperature and it is determined that the switching timing is reached, the operation switching on / off valve 11 of the B system carburetor Vb is closed, the B system carburetor Vb is switched to the standby state, and the B system steam The on-off valve 13 is closed to stop the heating operation of the heating means H of the B system, and the operation switching on / off valve 11 of the carburetor Va of the A system is opened, and the carburetor Va of the A system is opened. Switch to the operating state.

図示を省略するが、制御部２は、操作部３から運転停止指令が指令されると、元開閉弁１０を閉弁し、並びに、運転状態の系統の運転切換用開閉弁１１を閉弁して、運転状態の気化器Ｖを待機状態に切り換えると共に、運転状態の系統の蒸気用開閉弁１３を閉弁して、運転状態の気化器Ｖの加熱手段Ｈの加熱作動を停止する。   Although illustration is omitted, when the operation stop command is instructed from the operation unit 3, the control unit 2 closes the original on-off valve 10 and closes the operation switching on-off valve 11 of the system in the operating state. Then, the vaporizer V in the operating state is switched to the standby state, and the steam on-off valve 13 of the system in the operating state is closed to stop the heating operation of the heating means H of the vaporizer V in the operating state.

本発明の液化燃料ガス気化装置は、上述のように構成されているので、運転切換用開閉弁１１より気化器Ｖが待機状態に切り換えられている間、断続用設定時間Ｔｉが経過する毎に、その待機状態の気化器Ｖの貯水槽４内の蒸気噴出部１２により、攪拌用設定時間Ｔｍの間、蒸気Ｓが有底円筒状の貯水槽４内の下部における内周面の近傍からその貯水槽４の内周面に沿って周方向に向けて噴出される。
そして、その蒸気噴出部１２からの蒸気噴出により、貯水槽４内を湯水Ｗが下方から上方に向けて旋回状態で流動するので、貯水槽４内の湯水Ｗが良好に攪拌されることになって、貯水槽４内における上下方向での湯水Ｗの温度差を十分に小さくすることができる。
しかも、断続用設定時間Ｔｉが経過する毎に、つまり、貯水槽４内の上部の湯水Ｗの温度が下限温度に低下するまでに、蒸気噴出部１２から蒸気Ｓが噴出されて、貯水槽４内の湯水Ｗが加熱されると共に攪拌される。 Since the liquefied fuel gas vaporizer of the present invention is configured as described above, every time the intermittent set time Ti elapses while the vaporizer V is switched to the standby state from the operation switching on-off valve 11. The steam S 12 in the water storage tank 4 of the vaporizer V in the standby state allows the steam S to move from the vicinity of the inner peripheral surface in the lower part of the bottomed cylindrical water storage tank 4 for the set time Tm for stirring. Jetted in the circumferential direction along the inner peripheral surface of the water storage tank 4.
And since the hot water W flows in the water tank 4 in the swirl state from the lower side to the upper side by the steam jet from the steam jet part 12, the hot water W in the water tank 4 is well stirred. Thus, the temperature difference of the hot water W in the vertical direction in the water storage tank 4 can be sufficiently reduced.
Moreover, every time the intermittent setting time Ti elapses, that is, until the temperature of the hot water W in the upper part of the water tank 4 is lowered to the lower limit temperature, the steam S is ejected from the steam ejection part 12, and the water tank 4. The hot water W in the inside is heated and stirred.

従って、待機状態に切り換えられている気化器Ｖの貯水槽４内の湯水Ｗの温度を貯水槽４内の略全域にわたって、液化燃料ガスＧに含まれる成分のうちで沸点の最も高い成分も十分に気化させることができる温度以上に維持することができるので、気化器Ｖが待機状態になっている間に、その気化器Ｖに残留している液化燃料ガスＧの組成が変動するのを抑制することができる。
その結果、気化器Ｖが待機状態から運転状態に切り換えられる際の供給燃料ガスＧの熱量変動を的確に抑制することができる。 Therefore, the temperature of the hot water W in the water tank 4 of the vaporizer V that has been switched to the standby state is sufficient for the component having the highest boiling point among the components contained in the liquefied fuel gas G over almost the entire area in the water tank 4. Therefore, the composition of the liquefied fuel gas G remaining in the vaporizer V can be prevented from fluctuating while the vaporizer V is in the standby state. can do.
As a result, it is possible to accurately suppress the heat amount fluctuation of the supplied fuel gas G when the carburetor V is switched from the standby state to the operating state.

〔第２実施形態〕
以下、第２実施形態を説明するが、この第２実施形態は、攪拌手段Ｍの作動制御に関する別の実施形態を説明するものであるので、第１実施形態と同じ構成要素や同じ作用を有する構成要素については、重複説明を避けるために、同じ符号を付すことにより説明を省略し、主として、液化燃料ガス気化装置の全体構成並びに制御部２の制御動作において、上記の第１実施形態と異なる点について説明する。 [Second Embodiment]
Hereinafter, although 2nd Embodiment is described, since this 2nd Embodiment demonstrates another embodiment regarding the operation control of the stirring means M, it has the same component and 1st action as 1st Embodiment. In order to avoid redundant description, the description of components is omitted by giving the same reference numerals, and mainly the overall configuration of the liquefied fuel gas vaporizer and the control operation of the control unit 2 are different from those of the first embodiment. The point will be described.

この第２実施形態では、図４に示すように、各気化器Ｖには、上記の第１実施形態で説明した構成に加えて、貯水槽４内下部の湯水の温度を検出する下部湯水温度センサ１８が設けられている。
又、上記の第１実施形態と同様に、加熱手段Ｈが、蒸気噴出部１２と蒸気用開閉弁１３とを備えて構成されて、加熱手段Ｈが攪拌手段Ｍに兼用されている。 In the second embodiment, as shown in FIG. 4, each vaporizer V has a lower hot water temperature for detecting the temperature of the hot water in the lower part of the water tank 4 in addition to the configuration described in the first embodiment. A sensor 18 is provided.
Further, as in the first embodiment, the heating means H is configured to include the steam ejection portion 12 and the steam opening / closing valve 13, and the heating means H is also used as the stirring means M.

そして、制御部２が、運転切換用開閉弁１１より気化器Ｖを待機状態に切り換えている間において、下部湯水温度センサ１８にて検出される湯水の温度が攪拌開始用設定温度（設定温度に相当する）以下になると、当該気化器Ｖの攪拌手段Ｍを攪拌作動させるように構成されている。ちなみに、前記攪拌開始用設定温度は、例えば、上記の第１実施形態で説明した下限温度に設定される。
つまり、加熱手段Ｈが攪拌手段Ｍに兼用されているので、この第２実施形態においても、加熱手段Ｈが、当該加熱手段Ｈを備えた気化器Ｖが運転切換用開閉弁１１により待機状態に切り換えられている間においても、加熱作動を行うように構成されている。 While the control unit 2 switches the vaporizer V to the standby state from the operation switching on-off valve 11, the temperature of the hot water detected by the lower hot water temperature sensor 18 is changed to the set temperature for starting stirring (set to the set temperature). In the following, the stirring means M of the vaporizer V is configured to be stirred. Incidentally, the set temperature for starting stirring is set to, for example, the lower limit temperature described in the first embodiment.
That is, since the heating means H is also used as the stirring means M, in this second embodiment, the heating means H is placed in a standby state by the operation switching on / off valve 11 when the vaporizer V provided with the heating means H is in operation. Even during switching, the heating operation is performed.

制御部２の制御動作において、運転切換用開閉弁１１により気化器Ｖを待機状態に切り換えている間の当該気化器Ｖの攪拌手段Ｍの作動を制御する制御動作、即ち、蒸気用開閉弁１３の作動を制御する制御動作が異なる以外は、上記の第１実施形態と同様である。
従って、制御部２の制御動作の説明については、制御動作のタイムチャートの図示を省略して、上記の第１実施形態と異なる点を主として説明する。 In the control operation of the control unit 2, the control operation for controlling the operation of the stirring means M of the vaporizer V while the vaporizer V is switched to the standby state by the operation switching on-off valve 11, that is, the steam on-off valve 13. Except for the difference in the control operation for controlling the operation of the above, it is the same as in the first embodiment.
Therefore, regarding the description of the control operation of the control unit 2, the illustration of the time chart of the control operation is omitted, and the difference from the first embodiment will be mainly described.

制御部２は、上記の第１実施形態と同様に、気化ガス温度センサ１６の検出温度に基づいて切換タイミングになったと判別する毎に、２系統の気化器Ｖのうちの一方が運転状態となり他方が待機状態となる形態で、２系統の気化器Ｖ夫々を運転状態と待機状態とに切り換えるべく、２系統の運転切換用開閉弁１１の作動を制御する。   As in the first embodiment, whenever the control unit 2 determines that the switching timing is reached based on the temperature detected by the vaporized gas temperature sensor 16, one of the two vaporizers V enters the operating state. In the form in which the other is in a standby state, the operation of the two systems of the operation switching on-off valve 11 is controlled to switch each of the two systems of the carburetor V between the operation state and the standby state.

そして、制御部２は、Ａ系統の気化器Ｖａを運転状態に維持している間、待機状態のＢ系統の気化器Ｖｂに備えられた下部湯水温度センサ１８の検出温度が攪拌開始用設定温度以下になる毎に、Ｂ系統の蒸気用開閉弁１３を攪拌用設定時間Ｔｍの間開弁して、Ｂ系統の攪拌手段Ｍを攪拌作動させると共に、Ｂ系統の加熱手段Ｈを加熱作動させる。
又、制御部２は、Ｂ系統の気化器Ｖｂを運転状態に維持している間、待機状態のＡ系統の気化器Ｖａに備えられた下部湯水温度センサ１８の検出温度が攪拌開始用設定温度以下になる毎に、Ａ系統の蒸気用開閉弁１３を攪拌用設定時間Ｔｍの間開弁して、Ａ系統の攪拌手段Ｍを攪拌作動させると共に、Ａ系統の加熱手段Ｈを加熱作動させる。 And while the control part 2 is maintaining the carburetor Va of A system in the driving | running state, the detected temperature of the lower hot water temperature sensor 18 with which the carburetor Vb of B system of the standby state was equipped is set temperature for stirring start Whenever the following occurs, the steam on-off valve 13 of the B system is opened for the set time Tm for stirring, the stirring means M for the B system is agitated, and the heating means H for the B system is heated.
Further, the control unit 2 maintains the detected temperature of the lower hot water temperature sensor 18 provided in the carburetor Va of the A system in the standby state while the carburetor Vb of the B system is in the operating state. Whenever the following occurs, the steam on-off valve 13 of the A system is opened for the set time Tm for stirring, and the stirring means M of the A system is stirred and the heating means H of the A system is heated.

この第２実施形態の液化燃料ガス気化装置でも、待機状態に切り換えられている気化器Ｖの貯水槽４内の湯水Ｗの温度を貯水槽４内の略全域にわたって、液化燃料ガスＧに含まれる成分のうちで沸点の最も高い成分も十分に気化させることができる温度以上に維持することができるので、気化器Ｖが待機状態になっている間に、その気化器Ｖに残留している液化燃料ガスＧの組成が変動するのを抑制することができる。
従って、気化器Ｖが待機状態から運転状態に切り換えられる際の供給燃料ガスＧの熱量変動を的確に抑制することができる。 Also in the liquefied fuel gas vaporizer of the second embodiment, the temperature of the hot water W in the water tank 4 of the vaporizer V that has been switched to the standby state is included in the liquefied fuel gas G over almost the entire area in the water tank 4. Among the components, the component having the highest boiling point can be maintained at a temperature that can be sufficiently vaporized, so that the liquefaction remaining in the vaporizer V while the vaporizer V is in the standby state. Fluctuation of the composition of the fuel gas G can be suppressed.
Therefore, it is possible to accurately suppress the variation in the amount of heat of the supplied fuel gas G when the vaporizer V is switched from the standby state to the operating state.

〔別実施形態〕
次に別実施形態を説明する。
（イ） 蒸気噴出部１２からの蒸気の噴出形態は、上記の各実施形態において例示した噴出形態、即ち、貯水槽４内の下部における内周面の近傍から貯水槽４の内周面に沿って周方向に向けて噴出する形態に限定されるものではない。例えば、貯水槽４内の下部から上方に向けて噴出する形態でも良い。この場合は、例えば、容器状体や、先端が閉塞され且つリング状に成形された管状体に複数の蒸気噴出孔を形成して、この容器状体や管状体により蒸気噴出部１２を構成する。そして、このような蒸気噴出部１２を蒸気噴出孔が上向きになる状態で貯水槽４内の下部に設けることになる。 [Another embodiment]
Next, another embodiment will be described.
(A) The steam ejection form from the steam ejection part 12 is the ejection form exemplified in each of the above embodiments, that is, from the vicinity of the inner peripheral surface in the lower part of the water storage tank 4 to the inner peripheral surface of the water storage tank 4. It is not limited to the form which ejects toward the circumferential direction. For example, the form which spouts upwards from the lower part in the water tank 4 may be sufficient. In this case, for example, a plurality of vapor ejection holes are formed in a container-shaped body or a tubular body whose tip is closed and formed in a ring shape, and the vapor ejection section 12 is configured by the container-shaped body and the tubular body. . And such a vapor | steam ejection part 12 will be provided in the lower part in the water tank 4 in the state which a vapor | steam ejection hole faces upward.

（ロ） 加熱手段Ｈ及び攪拌手段Ｍの構成は、上記の各実施形態において例示した構成、即ち、加熱手段Ｈを蒸気噴出部１２と噴出断続手段としての蒸気用開閉弁１３とを備えて構成して、加熱手段Ｈを攪拌手段Ｍに兼用する構成に限定されるものではない。
例えば、加熱手段Ｈを貯水槽４内に設けた電気ヒータにて構成しても良い。あるいは、貯水槽４外に湯水を加熱する熱源を設け、貯水槽４内の湯水を槽外の熱源を通して循環させる湯水循環手段を設けて、これら熱源と湯水循環手段とにより加熱手段Ｈを構成しても良い。
攪拌手段Ｍは、例えば、貯水槽４内の底部に設けた羽根体と、この羽根体を回転駆動させるモータとを備えて構成しても良い。 (B) The structure of the heating means H and the stirring means M is the structure exemplified in each of the above embodiments, that is, the heating means H is provided with the steam ejection part 12 and the steam on-off valve 13 as the ejection intermittent means. And it is not limited to the structure which uses the heating means H as the stirring means M.
For example, the heating means H may be configured by an electric heater provided in the water storage tank 4. Alternatively, a heat source for heating hot water is provided outside the water tank 4, hot water circulating means for circulating hot water in the water tank 4 through the heat source outside the tank is provided, and the heating means H is constituted by these heat sources and hot water circulation means. May be.
The agitation means M may include, for example, a blade body provided at the bottom in the water storage tank 4 and a motor that rotationally drives the blade body.

このように、加熱手段Ｈを攪拌手段Ｍに兼用しないように構成する場合において、加熱手段Ｈを、当該加熱手段Ｈを備えた気化器Ｖが運転切換用開閉弁１１により待機状態に切り換えられている間においても加熱作動を行うように構成するに当たっては、その加熱目標温度は、上記の第１及び第２の各実施形態で説明した運転用設定温度よりも低い温度に設定する。   In this way, when the heating means H is configured not to be used as the stirring means M, the vaporizer V equipped with the heating means H is switched to the standby state by the operation switching on-off valve 11. In the case where the heating operation is performed even during the operation, the heating target temperature is set to a temperature lower than the set temperature for operation described in each of the first and second embodiments.

（ハ） 貯水槽４の形状は、上記の各実施形態において例示した有底円筒状に限定されるものではなく、例えば、横断面形状が矩形状の槽でも良い。 (C) The shape of the water storage tank 4 is not limited to the bottomed cylindrical shape illustrated in each of the above embodiments, and may be, for example, a tank having a rectangular cross-sectional shape.

（ニ） 上記の各実施形態では、運転切換用開閉弁１１を液化燃料ガス供給路７に設けたが、燃料ガス送出路８に設けても良い。 (D) In each of the above embodiments, the operation switching on-off valve 11 is provided in the liquefied fuel gas supply path 7, but may be provided in the fuel gas delivery path 8.

（ホ） 上記の各実施形態では、気化器Ｖを２系統設けたが、３系統以上設けても良い。この場合は、複数系統の気化器Ｖのうちの一部が運転状態となり残りが待機状態となる形態で、複数系統の気化器Ｖ夫々を運転状態と待機状態とに切り換えることになる。 (E) In each of the above embodiments, two vaporizers V are provided, but three or more vaporizers may be provided. In this case, a part of the carburetors V in the plurality of systems is in an operating state and the rest are in a standby state, and each of the carburetors V in the plurality of systems is switched between an operating state and a standby state.

（ヘ） 上記の各実施形態では、運転状態切換手段Ｃを、２系統の液化燃料ガス供給路７に夫々設けられた２系統の運転切換用開閉弁１１にて構成したが、この構成に限定されるものではない。
例えば、複数系統の気化器Ｖとして、２系統の気化器Ｖを設ける場合、運転状態切換手段Ｃを三方弁にて構成することができる。 (F) In each of the above-described embodiments, the operation state switching means C is configured by the two systems of the operation switching on-off valves 11 provided in the two systems of the liquefied fuel gas supply paths 7, respectively, but is limited to this configuration. Is not to be done.
For example, when two carburetors V are provided as a plurality of carburetors V, the operation state switching means C can be configured by a three-way valve.

（ト） 複数系統の気化器Ｖのうちの一部が運転状態となり残りが待機状態となる形態で、複数系統の気化器Ｖ夫々を運転状態と待機状態とに切り換える切換タイミングは、上記の各実施形態において例示したタイミング、即ち、気化ガス温度センサ１６の検出温度に基づいて、運転状態の気化器Ｖの気化能力低下を検知したタイミングに限定されるものではない。例えば、所定の設定時間が経過する毎に設定しても良い。あるいは、運転する気化器Ｖの切り換えを指令する手動操作式の気化器切換スイッチを設けて、その気化器切換スイッチにより気化器切り換えが指令されると、切換タイミングになった判別するように構成しても良い。 (G) The switching timing for switching each of the carburetors V of the plurality of systems between the operation state and the standby state in a form in which a part of the carburetors V of the plurality of systems is in an operating state and the rest is in a standby state. The timing is not limited to the timing exemplified in the embodiment, that is, the timing at which a decrease in the vaporization capability of the vaporizer V in the operating state is detected based on the temperature detected by the vaporized gas temperature sensor 16. For example, it may be set every time a predetermined set time elapses. Alternatively, a manually operated carburetor changeover switch for instructing switching of the carburetor V to be operated is provided, and when the carburetor changeover is instructed by the carburetor changeover switch, the changeover timing is determined. May be.

（チ） 上記の各実施形態においては、気化器Ｖを複数系統設けたが、気化器Ｖを１系統設けても良い。
この場合は、図示を省略するが、気化器Ｖを上記の各実施形態と同様に構成し、燃料ガス供給路７を直接液化燃料ガス貯槽１に接続し、燃料ガス送出路８を通して需要家に燃料ガスを供給するように構成する。
又、燃料ガス供給路７又は燃料ガス送出路８のいずれかに、運転切換用開閉弁１１を設けて、この運転切換用開閉弁１１により運転状態切換手段Ｃを構成することになる。
そして、例えば、気化器Ｖの運転及び停止を指令する運転スイッチを設けて、その運転スイッチにより運転や停止が指令されるタイミングを、気化器Ｖを運転状態と待機状態とに切り換える切換タイミングとする。
切換タイミングになったときの運転切換用開閉弁１１の制御、並びに、運転切換用開閉弁１１により気化器Ｖが運転状態に切り換えられている間及び待機状態に切り換えられている間夫々における蒸気用開閉弁１３の制御に関する制御部２の制御動作は、上記の各実施形態と同様であるので、説明を省略する。 (H) In each of the above embodiments, a plurality of vaporizers V are provided. However, one vaporizer V may be provided.
In this case, although not shown, the carburetor V is configured in the same manner as in each of the above embodiments, the fuel gas supply path 7 is directly connected to the liquefied fuel gas storage tank 1, and the fuel gas delivery path 8 is used for consumers. The fuel gas is supplied.
Further, an operation switching on / off valve 11 is provided in either the fuel gas supply path 7 or the fuel gas delivery path 8, and the operation switching means C is constituted by the operation switching on / off valve 11.
Then, for example, an operation switch for instructing operation and stop of the vaporizer V is provided, and a timing at which operation or stop is instructed by the operation switch is set as a switching timing for switching the vaporizer V between the operation state and the standby state. .
Control of the operation switching on / off valve 11 at the switching timing, and for steam during the switching of the carburetor V to the operating state and the standby state by the operation switching on / off valve 11 Since the control operation of the control unit 2 relating to the control of the on-off valve 13 is the same as that in each of the above embodiments, the description thereof is omitted.

（リ） 本発明は、ＬＮＧを気化対象とする液化燃料ガス気化装置の他に、ＬＮＧ以外の種々の液化燃料ガス（但し、沸点が異なる複数の成分からなる組成のもの）を気化対象とする液化燃料ガス気化装置に適用することができる。 (I) In addition to the liquefied fuel gas vaporizer that targets LNG for vaporization, the present invention targets various liquefied fuel gases other than LNG (however, compositions having a plurality of components having different boiling points). It can be applied to a liquefied fuel gas vaporizer.

以上説明したように、気化器が待機状態から運転状態に切り換えられる際の供給燃料ガスの熱量変動を抑制し得る液化燃料ガス気化装置を提供することができる。   As described above, it is possible to provide a liquefied fuel gas vaporizer that can suppress fluctuations in the amount of heat of the supplied fuel gas when the vaporizer is switched from the standby state to the operating state.

２ 制御部（制御手段）
４ 貯水槽（貯槽）
５ 伝熱管
１２ 蒸気噴出部
１３ 蒸気用開閉弁（噴出断続手段）
Ｃ 運転状態切換手段
Ｇ 液化燃料ガス、燃料ガス
Ｈ 加熱手段
Ｍ 攪拌手段
Ｓ 蒸気
Ｖ 気化器
Ｗ 熱媒体 2 Control unit (control means)
4 water storage tank (storage tank)
5 Heat Transfer Tube 12 Steam Ejecting Portion 13 Steam On / Off Valve (Ejection Intermittent Means)
C Operating state switching means G Liquefied fuel gas, fuel gas H Heating means M Stirring means S Steam V Vaporizer W Heat medium

Claims (6)

液状の熱媒体を貯留する貯槽と、その貯槽内の熱媒体を加熱する加熱手段と、その貯槽内に配設されて、供給される液化燃料ガスを熱媒体との熱交換により気化して燃料ガスを送出する伝熱管とを備えて構成された気化器が、複数系統設けられ、
それら複数系統の気化器を各別に液化燃料ガスを通流させる運転状態と液化燃料ガスを通流させない待機状態とに切り換える運転状態切換手段が設けられ、
前記複数系統の気化器のうちの一部が前記運転状態となり残りが前記待機状態となる形態で、前記複数系統の気化器夫々を前記運転状態と前記待機状態とに切り換えるべく、前記運転状態切換手段の作動を制御する制御手段が設けられた液化燃料ガス気化装置であって、
前記複数系統の気化器夫々に、前記貯槽内の熱媒体を攪拌する攪拌作動を行う攪拌手段が設けられ、
前記制御手段が、前記運転状態切換手段により前記待機状態に切り換えている気化器の攪拌手段を攪拌作動させるように構成されている液化燃料ガス気化装置。 A storage tank for storing a liquid heat medium, a heating means for heating the heat medium in the storage tank, and a fuel that is disposed in the storage tank and vaporizes the supplied liquefied fuel gas by heat exchange with the heat medium. A plurality of vaporizers configured to include a heat transfer tube for sending gas is provided,
An operation state switching means for switching between the operation state in which the liquefied fuel gas is allowed to flow separately and the standby state in which the liquefied fuel gas is not allowed to flow through the plurality of vaporizers is provided,
In order to switch each of the plurality of carburetors between the operation state and the standby state, a part of the plurality of carburetors is in the operation state and the rest is in the standby state. A liquefied fuel gas vaporizer provided with control means for controlling the operation of the means,
Each of the plurality of vaporizers is provided with stirring means for performing a stirring operation of stirring the heat medium in the storage tank,
A liquefied fuel gas vaporizer configured such that the control means stirs a stirring means of a carburetor that is switched to the standby state by the operating state switching means. 液状の熱媒体を貯留する貯槽と、その貯槽内の熱媒体を加熱する加熱手段と、その貯槽内に配設されて、供給される液化燃料ガスを熱媒体との熱交換により気化して燃料ガスを送出する伝熱管とを備えて構成された気化器が設けられ、
その気化器を液化燃料ガスを通流させる運転状態と液化燃料ガスを通流させない待機状態とに切り換える運転状態切換手段と、
前記気化器を前記運転状態と前記待機状態とに切り換えるべく、前記運転状態切換手段の作動を制御する制御手段とが設けられた液化燃料ガス気化装置であって、
前記気化器に、前記貯槽内の熱媒体を攪拌する攪拌作動を行う攪拌手段が設けられ、
前記制御手段が、前記運転状態切換手段により前記気化器を前記待機状態に切り換えている間において、前記攪拌手段を攪拌作動させるように構成されている液化燃料ガス気化装置。 A storage tank for storing a liquid heat medium, a heating means for heating the heat medium in the storage tank, and a fuel that is disposed in the storage tank and vaporizes the supplied liquefied fuel gas by heat exchange with the heat medium. A vaporizer configured with a heat transfer tube for delivering gas is provided,
An operation state switching means for switching the vaporizer to an operation state in which the liquefied fuel gas is allowed to flow and a standby state in which the liquefied fuel gas is not allowed to flow;
A liquefied fuel gas vaporizer provided with a control means for controlling the operation of the operation state switching means to switch the vaporizer between the operation state and the standby state,
The vaporizer is provided with a stirring means for performing a stirring operation of stirring the heat medium in the storage tank,
A liquefied fuel gas vaporizer configured to agitate the agitation means while the control means is switching the vaporizer to the standby state by the operating state switching means. 前記制御手段が、前記運転状態切換手段により前記気化器を前記待機状態に切り換えている間において、設定時間が経過する毎に、又は、前記貯槽内の下部の熱媒体の温度が設定温度以下になると、当該気化器の攪拌手段を攪拌作動させるように構成されている請求項１又は２に記載の液化燃料ガス気化装置。   While the control unit is switching the vaporizer to the standby state by the operation state switching unit, every time a set time elapses, or the temperature of the lower heating medium in the storage tank is equal to or lower than the set temperature. If it becomes, the liquefied fuel gas vaporizer of Claim 1 or 2 comprised so that the stirring means of the said vaporizer might carry out stirring operation. 前記加熱手段が、当該加熱手段を備えた気化器が前記運転状態切換手段により前記待機状態に切り換えられている間においても、加熱作動を行うように構成されている請求項１〜３のいずれか１項に記載の液化燃料ガス気化装置。   4. The heating device according to claim 1, wherein the heating unit is configured to perform a heating operation even while the vaporizer including the heating unit is switched to the standby state by the operation state switching unit. 2. The liquefied fuel gas vaporizer according to item 1. 前記加熱手段が、前記貯槽内に加熱媒体としての蒸気を噴出する蒸気噴出部と、その蒸気噴出部からの蒸気の噴出を断続する噴出断続手段とを備えて、前記蒸気噴出部による蒸気の噴出により前記貯槽内の熱媒体を加熱するのに合わせて攪拌するように構成されて、前記加熱手段が前記攪拌手段に兼用されている請求項１〜４のいずれか１項に記載の液化燃料ガス気化装置。   The heating means includes a steam ejection part for ejecting steam as a heating medium in the storage tank, and an ejection intermittent means for intermittently ejecting steam from the steam ejection part, and the steam ejection by the steam ejection part The liquefied fuel gas according to any one of claims 1 to 4, wherein the liquefied fuel gas is configured so as to stir in accordance with heating of the heat medium in the storage tank, and the heating means is also used as the stirring means. Vaporizer. 前記貯槽が有底円筒状であり、
前記蒸気噴出部が、前記有底円筒状の貯槽内の下部における内周面の近傍から、前記貯槽の内周面に沿って周方向に向けて蒸気を噴出するように設けられている請求項５に記載の液化燃料ガス気化装置。 The storage tank has a bottomed cylindrical shape;
The steam ejection part is provided so as to eject steam from a vicinity of an inner peripheral surface in a lower part of the bottomed cylindrical storage tank toward a circumferential direction along an inner peripheral surface of the storage tank. 6. The liquefied fuel gas vaporizer according to 5.
JP2010008486A 2010-01-18 2010-01-18 Liquefied fuel gas vaporizing device Pending JP2011144915A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010008486A JP2011144915A (en) 2010-01-18 2010-01-18 Liquefied fuel gas vaporizing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010008486A JP2011144915A (en) 2010-01-18 2010-01-18 Liquefied fuel gas vaporizing device

Publications (1)

Publication Number Publication Date
JP2011144915A true JP2011144915A (en) 2011-07-28

Family

ID=44459943

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2010008486A Pending JP2011144915A (en) 2010-01-18 2010-01-18 Liquefied fuel gas vaporizing device

Country Status (1)

Country Link
JP (1) JP2011144915A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019171341A (en) * 2018-03-29 2019-10-10 古河電気工業株式会社 Vaporizer
CN117307951A (en) * 2023-09-21 2023-12-29 北京天海工业有限公司 Self-pressurizing device for liquid hydrogen cylinder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019171341A (en) * 2018-03-29 2019-10-10 古河電気工業株式会社 Vaporizer
CN117307951A (en) * 2023-09-21 2023-12-29 北京天海工业有限公司 Self-pressurizing device for liquid hydrogen cylinder
CN117307951B (en) * 2023-09-21 2024-04-05 北京天海工业有限公司 Self-pressurizing device for liquid hydrogen cylinder

Similar Documents

Publication Publication Date Title
JP5138986B2 (en) Hydrogen generator and fuel cell system including the same
CN104094060A (en) Marine vessel, fuel-supplying device, and method for supplying liquefied fuel gas to main engine for propulsion
KR101959154B1 (en) Boiler feed-water system, boiler provided with said system, and boiler feed-water method
JP2009209995A (en) Liquefied natural gas vaporizer and liquefied natural gas vaporization system
JP2009299941A (en) Hot water supply system
JP2015204172A (en) fuel cell system
CN102395525A (en) Hydrogen generation device and fuel cell system equipped with same
JP2018070217A (en) Water server, water supply method of the same, and water supply processing program of the same
JP2011137608A (en) Liquefied fuel gas vaporizer
JP2011144915A (en) Liquefied fuel gas vaporizing device
JP5857259B2 (en) Hot water system
KR101686912B1 (en) Devivce for liquefied gas supply
JP6050696B2 (en) Fuel heating system for power plants
JP5785468B2 (en) Gas-liquid two-phase fluid state control device and gas-liquid two-phase fluid state control method
JP2009216334A (en) Fuel gas feeder for thermal power plant
US20100205958A1 (en) Exhaust heat recovering method, exhaust heat recovering apparatus and cogeneration system
JP5904010B2 (en) Control method for hot water storage hot water supply system
JP2012021689A (en) Hot water supply system
JP2006155982A (en) Vapor supply device
KR101995462B1 (en) LNG Fuel Gas Supply System
JP5473823B2 (en) Fuel cell system
JP5662192B2 (en) Hot water storage water heater
JP4282376B2 (en) Liquefied gas fuel supply apparatus and method for supplying liquefied gas fuel
JP2016125567A (en) Evaporator for liquefied gas
JP6294641B2 (en) Liquefied fuel gas vaporizer