JP4154194B2 - Liquefied petroleum gas filling system for vehicle fuel - Google Patents
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Description
【０００１】
【発明の属する技術分野】
本発明は、車輛に搭載された車輛容器に車輛燃料用液化石油ガスを供給するための車輛燃料用液化石油ガス充填システムに関する。
【従来の技術】
車輛に搭載された車輛容器に車輛燃料用液化石油ガスを供給する方法として、補給元の車輛燃料用液化石油ガス貯蔵容器から導出した車輛燃料用液化石油ガスを充填ポンプで充填する必要がある。この場合には、充填ポンプを使用して車輛燃料用液化石油ガス貯蔵容器内の車輛燃料用液化石油ガスを充填することから、高圧ガス保安法上第１種製造者となり、広範囲な法定距離の確保が必要である。また、他の方法としては、車輛燃料用液化石油ガスよりも同一温度において蒸気圧の高い液化石油ガスを加圧用ガスとして車輛燃料用液化石油ガス貯蔵容器に供給し、車輛燃料用液化石油ガス貯蔵容器の内圧と車輛容器の内圧との差圧で充填する方法がある(特開平１１−２１０９８９号公報)。しかし、車輛に搭載された車輛容器は、日射やエンジンからの排熱等の影響を受けて昇温し、液化石油が気化して、その内圧が上昇する場合がある。このため、両容器の圧力差で車輛燃料用液化石油ガスを充填する場合には、加圧用ガスを車輛燃料用液化石油ガス貯蔵容器に供給して車輛燃料用液化石油ガス貯蔵容器の内圧を高めても、充分な差圧を得ることができず、充填速度が低下し、又は充填できないという問題がある。
この問題を解決するために、特開２００１−３１７６９３号公報には、車輛容器内の気化した液化石油ガスを車輛燃料用液化石油ガス貯蔵容器に回収する方法が開示されている。しかしながら、この方法では、車輛容器の内圧を充分下げることができず、満足な充填速度が得られないといった問題があった。
【０００２】
【特許文献１】
特開平１１−２１０９８９号公報
【特許文献２】
特開２００１−３１７６９３号公報
【０００３】
【発明が解決しようとする課題】
本発明は上記の問題点に鑑みてなされたものであり、両容器内の圧力差で車輛燃料用液化石油ガスを充填させる場合でも、所望の充填速度で車輛容器に車輛燃料用液化石油ガスを充填するシステムを提供することを目的とする。
【課題を解決するための手段】
上述の目的を達成するための本発明は、車輛燃料用液化石油ガスを貯蔵する貯蔵容器と、車輛に搭載された車輛容器と、該車輛容器から液化石油ガスを回収する液化石油ガス回収容器とを有し、前記貯蔵容器と前記車輛容器とを連結し、前記車輛容器と前記回収容器とを連結し、
上記連結のうち前記車輛容器と前記回収容器のみが連通されるようにして、前記車輛容器内の液化石油ガスを前記回収容器に移送し、前記車両容器の内圧を所定圧力まで減圧する減圧ステップ；次に
上記連結のうち前記貯蔵容器と前記車輛容器のみが連通されるようにして、車輛燃料用液化石油ガスを前記貯蔵容器から前記車輛容器に充填する充填ステップを行うことを特徴とする車輛燃料用液化石油ガス充填システムである。
【０００４】
さらに、本発明は上述の目的を達成するために、車輛燃料用液化石油ガスを貯蔵する貯蔵容器と、車輛に搭載された車輛容器と、液化石油ガスを溶解又は吸収する液状物質を収容した液化石油ガス回収容器であって該車輛容器から液化石油ガスを回収する液化石油ガス回収容器とを用意し、
前記貯蔵容器と前記車輛容器を３方弁の２つの連通口を介して連結し、さらに該３方弁の他の連通口を前記回収容器の液相部に連結し、
前記車輛容器と前記回収容器の液相部が連通されるように前記３方弁を操作して、前記車輛容器内の液化石油ガスを前記回収容器に移送し、これにより前記車両容器の内圧を所定圧力まで減圧し、
前記貯蔵容器と前記車輛容器が連通されるように前記３方弁を操作して、車輛燃料用液化石油ガスを前記貯蔵容器から前記車輛容器に充填することを含むことを特徴とする車輛燃料用液化石油ガス充填方法を提供する。
【０００５】
【発明の実施の形態】
図１は本発明の車輛燃料用液化石油ガス充填システムの概略構成図である。この車輛燃料用液化石油ガス充填システムは、車輛燃料用液化石油ガス貯蔵容器（１）と、車輛に搭載された車輛容器（２）と、車輛容器（２）から液化石油ガスを回収する液化石油ガス回収容器（３）と、貯蔵容器（１）から導出した液払い出しライン（５）と、液払い出しライン（５）に配置した流量計（４）と、流量計（４）よりも下流側から導出され、回収容器（３）に連通する圧抜きライン（６）とを有している。
このような構成からなる車輛燃料用液化石油ガス充填システムでは、貯蔵容器（１）から車輛容器（２）に充填させるのであるが、始めに車輛容器（２）と回収容器（３）の液相部とを連通させる。これにより、車輛容器（２）の内圧を所定圧力まで低下させる。
車輛容器（２）の内圧を所定圧力まで低下させた後、貯蔵容器（１）と車輛容器（２）とを連通させて、車輛燃料用液化石油ガスを車輛容器（２）に充填する。
このように、車輛容器（２）内の圧力を抜いた後、車輛燃料用液化石油ガスを充填するようにすると、貯蔵容器（１）の内圧と車輛容器（２）の内圧との間に所定の圧力差を確保することができるから、所望の充填速度により充填することができる。
【０００６】
本発明の充填ステップにおいて、貯蔵容器（１）と車輛容器（２）とを連通させる操作と、車輛燃料用液化石油ガスを車輛容器（２）に充填する操作とを連動させることができる。
本発明の充填ステップは、充填ポンプを使用して車輛燃料用液化石油ガス貯蔵容器から導出した車輛燃料用液化石油ガスを充填してもよく、又は車輛燃料用液化石油ガスよりも気化温度の低い液化石油ガスを加圧用ガスとして車輛燃料用液化石油ガスタンクに導入して車輛燃料用液化石油ガスタンクの内圧と車輛容器の内圧との差圧で充填する方法を使用して充填してもよいが、広範囲な法定距離の確保等が不要な後者が好ましい。後者の場合、車輛燃料用液化石油ガスを貯蔵する貯蔵容器は、加圧用ガスを収容した加圧用ガスタンクと、該加圧用ガスタンクに連通された車輛燃料用液化石油ガスタンクとを具備する。
加圧用ガスタンクから車輛燃料用液化石油ガスタンクに加圧用液化石油ガスを導入して充填する場合、加圧用液化石油ガスの車輛燃料用液化石油ガスへの溶解吸収を最小限とするために、加圧用ガスタンクと車輛燃料用液化石油ガスタンクとを連結する加圧ラインの開閉と、車輛燃料用液化石油ガスタンクから車輛容器への液払い出しラインの開閉とを同時に行うのがよい。さらに、例えば電磁弁を用いてエアーを制御するなどして貯蔵容器と車輛容器とを連通させる操作と前記加圧ライン及び液払い出しラインの開閉とを連動させることによって、システムの自動化が可能である。
【０００７】
本発明の液化石油ガス回収容器は、液化石油ガスを溶解又は吸収する液状物質及び／又は固体物質を収容するものが好ましい。また、前記回収容器は容器自体を交換可能とするタイプ、又は前記回収容器が収容している上記物質を交換可能とするタイプのいずれであってもよい。このように前記回収容器を車輛燃料用液化石油ガス貯蔵容器とは別の交換可能なタイプとすることで、液化石油ガスを溶解又は吸収する物質を任意に選択することができる。ここで、前記液状物質には、ペンタン、ブタンなどの炭化水素化合物、エタノール、メタノールなどのアルコール又は灯油やガソリン等を使用することができる。液状物質は２５℃における蒸気圧が０．９５Ｍｐａ（絶対圧力）以下である有機化合物とするのが好ましく、より好ましくは２５℃における蒸気圧が０．２３Ｍｐａ（絶対圧力）以下である有機化合物である。特に灯油やガソリン等の開放系で使用できる有機化合物を使用する場合には、簡便な容器を使用することができるので、経済性の観点からもメリットがある。さらに、圧力上昇が起こらないために回収速度の低下も生じない。また、前記固体物質としては、ゼオライト等が挙げられる。固体物質を使用する場合にはさらに回収容器をコンパクトにすることができる。
【０００８】
前記回収容器が液状物質を収容する場合、前記減圧ステップにおいて、車輛容器と回収容器の液相部を連通させるのが好ましい。液相部に連通させた場合には、気相部に連通させる場合と比べて液化石油ガスの溶解吸収率が高く、回収容器内の圧力上昇も抑制できるので回収速度は低下しない。さらに、回収する液化石油ガスを液相部に吹き込む場合には、その気泡を小さくすることでより良好な回収速度を得ることができる。気泡のサイズは１０ｍｍ以下が好ましく、より好ましくは０．０１〜２ｍｍである。気泡のサイズは、例えば液化石油ガスを液相部に吹き込むノズルの先端に分散器等を取り付けることによって小さくすることができるが、その他の従来から知られている方法によって気泡のサイズを小さくしてもよい。
【０００９】
【実施例】
（溶解吸収実験１）
実験１
液化プロパンを充填したバルブ付き容器（２０ｋｇ用に２０ｋｇの液化プロパンを充填：容器１）と液化ブタン（２５℃における蒸気圧は０．２３Ｍｐａ（絶対圧力））を充填したバルブ付き容器（１０ｋｇ用に７ｋｇの液化ブタンを充填：容器２）とを高圧ホースで接続し、ホースの中間部分にニードル弁を接続した。
次に、ニードル弁を一定の開度に固定し、容器１及び２のバルブを開いて、プロパンガスを容器２の気相部に移送した。
３分後、それぞれの容器圧力と容器重量を測定し、液化ブタンに溶解吸収された重量を算出した。気温は外気温３８℃であった。
実験２
容器２の代わりに液化ブタンを充填した、サイホン管（内径７ミリ）付き容器（１０ｋｇ用に７ｋｇの液化ブタンを充填：容器３）を用いて、実験１と同じ測定を行った。ただし、プロパンガスは容器３の液相部に移送した。
実験３
容器２の代わりに液化ブタンを充填した、先端に分散器（内径１．８ミリ×１５）を備えたサイホン管（内径７ミリ×１）付き容器（１０ｋｇ用に７ｋｇの液化ブタンを充填：容器４）を用いて、実験１と同じ測定を行った。ただし、プロパンガスは容器４の液相部に移送した。
以上の測定の結果を下記表１に示す。
【００１０】
【表１】
結果から、液化ブタンを充填した容器の液相部にプロパンガスを移送した場合には、気相部に移送した場合と比較して、約２倍のプロパンガスが溶解吸収された。サイホン管の先端に分散器を付けた場合には、プロパンガスの溶解吸収は、さらに１０％増加した。
【００１２】
（溶解吸収実験２）
図２のようにプロパン２０ｋｇを含む５０ｋｇボンベ（１１）と灯油（２５℃における蒸気圧はほとんど０Ｍｐａ（絶対圧力））５３１ｋｇを含む５００ｋｇボンベ（１２）を高圧ホース（１３）で接続し、ホースの中間部に安全弁（１４）を設置した。ボンベ（１２）の気相部は常時開放とした。また、安全弁は０．７ＭＰａに設定した。
次に、４０℃の温水で５０ｋｇボンベを加熱し、０．９ＭＰａまで昇圧した後、ボンベバルブＶ1（１５）及びＶ2（１６）を開いた。ガスの移動が始まり、自動的に停止するまでの所要時間と、その時点における５０ｋｇボンベの内圧を測定した。
上記操作を１０回繰り返して、５０ｋｇボンベと５００ｋｇボンベ、それぞれの総重量を測定した。外気温は３０℃であった。その結果を表２及び３に示す。
【００１３】
【表２】
表２ 所要時間と圧力変化
【表３】
表３ 実験前後の重量変化（ｋｇ）
結果から、１〜１０回で所要時間はほぼ等しい時間となった。重量変化は、移動したプロパンガスはほぼ全量が灯油に溶解吸収されたものと考えられる。
【００１６】
（溶解吸収実験３）
図３のようにプロパン２０ｋｇを含む５０ｋｇボンベ（２１）とブタン２０ｋｇを含む５０ｋｇボンベ（２２）を高圧ホースで接続し、ボンベ（２２）をハカリ（２３）の上に載せた。
次に、４０℃の温水で５０ｋｇボンベを加熱し、０．９ＭＰａまで昇圧した後、ボンベバルブＶ1（２４）及びＶ2（２５）を開いた。ガスの移動が始まり、ブタンを含むボンベ（２２）の重量が１ｋｇ増加した時点でＶ1（２４）及びＶ2（２５）を閉止し、プロバンガスの移動に費やした時間を測定した。プロパンガスが液化ブタンに溶解吸収されるまでの放置時間は３分間とし、５回目以降はボンベ（２２）の温度が上昇したので長くした。
ブタンを含むボンベ（２２）の内圧が０．６ＭＰａを超えるまで上記操作を繰り返して、プロパンを含むボンベ（２１）とブタンを含むボンベ（２２）、それぞれの総重量を測定した。外気温は２４．５℃であった。その結果を表４及び５に示す。プロパンについての圧力変化は、バルブＶ1（２４）及びＶ2（２５）を開く直前の圧力からＶ1（２４）及びＶ2（２５）を閉止した直後の圧力への変化を示し、ブタンについての圧力変化はバルブＶ1（２４）及びＶ2（２５）を開く直前の圧力から溶解吸収が終了した後の圧力への変化を示している。
【００１７】
【表４】
表４ 所要時間と圧力変化
【表５】
表５ 実験前後の重量変化（ｋｇ）
結果から、重量変化は測定誤差を考慮すると、移動したプロパンガスはほぼ全量がブタンに溶解吸収されたものと考えられる。なお、放置時間は３分間で実験したが５回目以降はボンベ（２２）の温度が上昇したため放置時間を長くとった。
【００２０】
（実施例１）
回収容器に開放式灯油タンクを用いた車輛燃料用液化石油ガス充填システムの例を図４に示す。このシステムは、以下の手順により車輛燃料用液化石油ガスが充填される。
手順：
１．所定の停止位置に車輛を停車し、車輛容器（３１）のバルブ（３２）に充填ホース（３３）のカップリング（３４）を接続する。
２．バルブ（３２）を開く。
３．車輛容器（３１）と回収容器（３５）が連通するように３方弁（３６）を操作する。車輛容器（３１）内のガスが回収容器（３５）に移送され、車輛容器（３１）の圧力が安全弁（３７）の設定圧まで下がると安全弁（３７）が閉止する。
４．車輛容器（３１）とガスメーター（３８）が連通するように３方弁（３６）を操作する。このとき３方弁（３６）の操作レバーと連動してエアー配管に設置してある電磁弁（４６）が「ＯＮ」になるので、エアー弁（４２）及び（４３）が同時に開いて充填作業を開始する。
５．ガスメーター（３８）が回転し、充填が始まる。過充填防止（３９）が作動して、充填が完了する。
６．充填完了後、３方弁（３６）を閉止位置に切り替えるとリミットスイッチ（４５）が外れて、エアー弁（４２）及び（４３）が同時に閉止する。バルブ（３２）を閉じ、カップリング（３４）を外す。
（実施例２）
回収容器に密閉式ブタンタンクを用いた車輛燃料用液化石油ガス充填システムの例を図５示す。このシステムは、以下の手順により車輛燃料用液化石油ガスが充填される。
手順：
１．所定の停止位置に車輛を停車し、車輛容器（５１）のバルブ（５２）に充填ホース（５３）のカップリング（５４）を接続する。
２．バルブ（５２）を開く。
３．車輛容器（５１）と回収容器（５５）が連通するように３方弁（５６）を操作する。車輛容器（５１）内のガスが回収容器（５５）に移送され、車輛容器（５１）の圧力が回収容器（５５）の圧力と均圧になるとガスの移送が停止する。
４．車輛容器（５１）とガスメーター（６０）が連通するように３方弁（５６）を操作する。このとき３方弁（５６）の操作レバーと連動してエアー配管に設置してある電磁弁（５８）が「ＯＮ」になるので、エアー弁（６４）及び（６５）が同時に開いて充填作業を開始する。
５．ガスメーター（６０）が回転し、充填が始まる。過充填防止（６１）が作動して、充填が完了する。
６．充填完了後、３方弁（５６）を閉止位置に切り替えるとリミットスイッチ（５７）が外れて、エアー弁（６４）及び（６５）が同時に閉止する。バルブ（５２）を閉じ、カップリング（５４）を外す。
【００２１】
【発明の効果】
本発明では、車輛容器内の気化ガスを車輛燃料用液化石油ガス充填前に、液化石油ガス回収容器に移送して、車輛燃料用液化石油ガス貯蔵容器から車輛容器への十分な充填速度で車輛燃料用液化石油ガスを充填することを可能にするのに必要な車輛燃料用液化石油ガス貯蔵容器と車輛容器との圧力差を確保することができる。
【図面の簡単な説明】
【図１】車輛燃料用液化石油ガス充填システムの概略図である。
【図２】溶解吸収実験２の概略図である。
【図３】溶解吸収実験３の概略図である。
【図４】開放式灯油タンクを用いた車輛燃料用液化石油ガス充填システムの概略図である。
【図５】密閉式ブタンタンクを用いた車輛燃料用液化石油ガス充填システムの概略図である。
【符号の説明】
４０、６２ 加圧タンク
４１、６３ 車輛燃料用液化石油ガスタンク
４４ 通気口
４７、５９ エアー
６６ オリフィス[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquefied petroleum gas filling system for vehicle fuel for supplying liquefied petroleum gas for vehicle fuel to a vehicle container mounted on the vehicle.
[Prior art]
As a method of supplying liquefied petroleum gas for vehicle fuel to a vehicle container mounted on the vehicle, it is necessary to fill the liquefied petroleum gas for vehicle fuel derived from the liquefied petroleum gas storage container for vehicle fuel with a filling pump. In this case, since the liquefied petroleum gas for vehicle fuel is filled in the liquefied petroleum gas storage container for the vehicle fuel using the filling pump, it becomes a first class manufacturer under the High Pressure Gas Safety Law and has a wide legal distance. Securement is necessary. As another method, liquefied petroleum gas having a higher vapor pressure at the same temperature than liquefied petroleum gas for vehicle fuel is supplied as a pressurized gas to a liquefied petroleum gas storage container for vehicle fuel, and liquefied petroleum gas storage for vehicle fuel is stored. There is a method of filling with a differential pressure between the internal pressure of the container and the internal pressure of the vehicle container (Japanese Patent Laid-Open No. 11-210989). However, the temperature of the vehicle container mounted on the vehicle may increase due to the effects of solar radiation, exhaust heat from the engine, and the like, and the liquefied petroleum may vaporize and the internal pressure may increase. For this reason, when filling the liquefied petroleum gas for vehicle fuel with the pressure difference between the two containers, supply the pressurized gas to the liquefied petroleum gas storage container for vehicle fuel to increase the internal pressure of the liquefied petroleum gas storage container for vehicle fuel. However, there is a problem that a sufficient differential pressure cannot be obtained, the filling speed is reduced, or the filling cannot be performed.
In order to solve this problem, Japanese Patent Laid-Open No. 2001-317693 discloses a method of recovering vaporized liquefied petroleum gas in a vehicle container into a liquefied petroleum gas storage container for vehicle fuel. However, this method has a problem that the internal pressure of the vehicle container cannot be lowered sufficiently and a satisfactory filling speed cannot be obtained.
[0002]
[Patent Document 1]
JP-A-11-210989 [Patent Document 2]
Japanese Patent Laid-Open No. 2001-317893
[Problems to be solved by the invention]
The present invention has been made in view of the above problems, and even when liquefied petroleum gas for vehicle fuel is filled with a pressure difference between both containers, the liquefied petroleum gas for vehicle fuel is charged into the vehicle container at a desired filling speed. An object is to provide a filling system.
[Means for Solving the Problems]
The present invention for achieving the above object includes a storage container for storing liquefied petroleum gas for vehicle fuel, a vehicle container mounted on the vehicle, and a liquefied petroleum gas recovery container for recovering liquefied petroleum gas from the vehicle container; And connecting the storage container and the vehicle container, connecting the vehicle container and the recovery container,
A pressure reducing step of transferring the liquefied petroleum gas in the vehicle container to the recovery container and reducing the internal pressure of the vehicle container to a predetermined pressure so that only the vehicle container and the recovery container are in communication with each other. Next, the vehicle fuel is characterized in that the vehicle fuel is filled with liquefied petroleum gas for vehicle fuel from the storage container to the vehicle container so that only the storage container and the vehicle container are in communication with each other. It is a liquefied petroleum gas filling system.
[0004]
Furthermore, in order to achieve the above object, the present invention provides a storage container for storing liquefied petroleum gas for vehicle fuel, a vehicle container mounted on the vehicle, and a liquefaction containing a liquid substance that dissolves or absorbs liquefied petroleum gas. A petroleum gas recovery container, and a liquefied petroleum gas recovery container for recovering liquefied petroleum gas from the vehicle container;
Connecting the storage container and the vehicle container via two communication ports of a three-way valve, and further connecting the other communication port of the three-way valve to the liquid phase part of the recovery container;
The three-way valve is operated so that the liquid phase portion of the vehicle container and the recovery container communicate with each other, and the liquefied petroleum gas in the vehicle container is transferred to the recovery container, thereby reducing the internal pressure of the vehicle container. Depressurize to the specified pressure,
Operating the three-way valve so that the storage container and the vehicle container communicate with each other, and filling the vehicle container with liquefied petroleum gas for vehicle fuel from the storage container. A liquefied petroleum gas filling method is provided.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic configuration diagram of a liquefied petroleum gas filling system for vehicle fuel according to the present invention. This liquefied petroleum gas filling system for vehicle fuel includes a liquefied petroleum gas storage container (1) for vehicle fuel, a vehicle container (2) mounted on the vehicle, and a liquefied petroleum gas that recovers liquefied petroleum gas from the vehicle container (2). From the gas recovery container (3), the liquid discharge line (5) led out from the storage container (1), the flow meter (4) disposed in the liquid discharge line (5), and the downstream side of the flow meter (4) It has a pressure release line (6) which is led out and communicates with the recovery container (3).
In the liquefied petroleum gas filling system for vehicle fuel having such a configuration, the vehicle container (2) is filled from the storage container (1). First, the liquid phase of the vehicle container (2) and the recovery container (3) is filled. Communicate with the department. Thereby, the internal pressure of a vehicle container (2) is reduced to a predetermined pressure.
After the internal pressure of the vehicle container (2) is reduced to a predetermined pressure, the storage container (1) and the vehicle container (2) are communicated to fill the vehicle container (2) with liquefied petroleum gas for vehicle fuel.
As described above, when the pressure in the vehicle container (2) is released and then the liquefied petroleum gas for vehicle fuel is filled, the predetermined pressure is applied between the internal pressure of the storage container (1) and the internal pressure of the vehicle container (2). Therefore, it is possible to fill at a desired filling speed.
[0006]
In the filling step of the present invention, the operation of connecting the storage container (1) and the vehicle container (2) and the operation of filling the vehicle container (2) with the liquefied petroleum gas for vehicle fuel can be linked.
The filling step of the present invention may be filled with liquefied petroleum gas for vehicle fuel derived from a liquefied petroleum gas storage container for vehicle fuel using a filling pump, or has a lower vaporization temperature than liquefied petroleum gas for vehicle fuel. The liquefied petroleum gas may be introduced into the liquefied petroleum gas tank for vehicle fuel as a pressurizing gas, and may be filled using a method of filling with a differential pressure between the internal pressure of the liquefied petroleum gas tank for vehicle fuel and the internal pressure of the vehicle container, The latter is preferable because it is not necessary to ensure a wide range of legal distances. In the latter case, the storage container that stores the liquefied petroleum gas for vehicle fuel includes a pressurized gas tank that contains the pressurized gas, and a liquefied petroleum gas tank for vehicle fuel that communicates with the pressurized gas tank.
When introducing and filling pressurized liquefied petroleum gas from a pressurized gas tank into a liquefied petroleum gas tank for vehicle fuel, in order to minimize dissolution and absorption of the pressurized liquefied petroleum gas into the liquefied petroleum gas for vehicle fuel, It is preferable to simultaneously open and close the pressurization line connecting the gas tank and the liquefied petroleum gas tank for vehicle fuel and open and close the liquid discharge line from the liquefied petroleum gas tank for vehicle fuel to the vehicle container. Furthermore, the system can be automated by linking the operation of communicating the storage container and the vehicle container with, for example, controlling air using a solenoid valve and the opening and closing of the pressure line and the liquid discharge line. .
[0007]
The liquefied petroleum gas recovery container of the present invention preferably contains a liquid substance and / or a solid substance that dissolves or absorbs the liquefied petroleum gas. Further, the recovery container may be either of a type that can replace the container itself or a type that can replace the substance contained in the recovery container. Thus, by making the said collection container into the exchangeable type different from the liquefied petroleum gas storage container for vehicle fuels, the substance which melt | dissolves or absorbs liquefied petroleum gas can be selected arbitrarily. Here, hydrocarbon compounds such as pentane and butane, alcohols such as ethanol and methanol, kerosene and gasoline can be used as the liquid substance. The liquid substance is preferably an organic compound having a vapor pressure at 25 ° C. of 0.95 Mpa (absolute pressure) or less, more preferably an organic compound having a vapor pressure at 25 ° C. of 0.23 Mpa (absolute pressure) or less. . In particular, when an organic compound that can be used in an open system such as kerosene or gasoline is used, a simple container can be used, which is also advantageous from the viewpoint of economy. Further, since the pressure does not increase, the recovery speed does not decrease. Examples of the solid substance include zeolite. When a solid substance is used, the collection container can be further compacted.
[0008]
When the recovery container contains a liquid substance, it is preferable that the vehicle container and the liquid phase part of the recovery container are communicated with each other in the decompression step. When communicating with the liquid phase part, the absorption rate of the liquefied petroleum gas is higher than when communicating with the gas phase part, and the increase in pressure in the recovery container can be suppressed, so the recovery rate does not decrease. Furthermore, when the liquefied petroleum gas to be recovered is blown into the liquid phase portion, a better recovery rate can be obtained by reducing the bubbles. The bubble size is preferably 10 mm or less, more preferably 0.01 to 2 mm. The bubble size can be reduced, for example, by attaching a disperser or the like to the tip of a nozzle that blows liquefied petroleum gas into the liquid phase part, but the bubble size can be reduced by other conventionally known methods. Also good.
[0009]
【Example】
(Dissolution absorption experiment 1)
Experiment 1
A container with a valve filled with liquefied propane (filled with 20 kg of liquefied propane for 20 kg: container 1) and a container with a valve filled with liquefied butane (vapor pressure at 25 ° C is 0.23 Mpa (absolute pressure)) (for 10 kg) Filled with 7 kg of liquefied butane: container 2) was connected with a high-pressure hose, and a needle valve was connected to the middle part of the hose.
Next, the needle valve was fixed at a constant opening, the valves of the
Three minutes later, each container pressure and container weight were measured, and the weight dissolved and absorbed in liquefied butane was calculated. The outside temperature was 38 ° C.
The same measurement as in Experiment 1 was performed using a container with a siphon tube (inner diameter 7 mm) filled with liquefied butane instead of the container 2 (filled with 7 kg of liquefied butane for 10 kg: container 3). However, propane gas was transferred to the liquid phase part of the
Container with siphon tube (inner diameter 7 mm × 1) equipped with a disperser (inner diameter 1.8 mm × 15) at the tip, filled with liquefied butane instead of container 2 (filled with 7 kg of liquefied butane for 10 kg: container 4), the same measurement as in Experiment 1 was performed. However, propane gas was transferred to the liquid phase part of the container 4.
The results of the above measurements are shown in Table 1 below.
[0010]
[Table 1]
From the results, when propane gas was transferred to the liquid phase part of the container filled with liquefied butane, about twice as much propane gas was dissolved and absorbed as compared with the case where it was transferred to the gas phase part. When the disperser was attached to the tip of the siphon tube, the dissolved absorption of propane gas was further increased by 10%.
[0012]
(Dissolution absorption experiment 2)
As shown in FIG. 2, a 50 kg cylinder (11) containing 20 kg of propane and a 500 kg cylinder (12) containing 531 kg of kerosene (the vapor pressure at 25 ° C. is almost 0 Mpa (absolute pressure)) are connected by a high pressure hose (13). A safety valve (14) was installed in the middle part. The gas phase part of the cylinder (12) was always open. The safety valve was set to 0.7 MPa.
Next, a 50 kg cylinder was heated with hot water of 40 ° C. and the pressure was increased to 0.9 MPa, and then cylinder valves V 1 (15) and V 2 (16) were opened. The time required for gas to start and stop automatically and the internal pressure of the 50 kg cylinder at that time were measured.
The above operation was repeated 10 times, and the total weight of each of the 50 kg cylinder and the 500 kg cylinder was measured. The outside temperature was 30 ° C. The results are shown in Tables 2 and 3.
[0013]
[Table 2]
Table 2 Time required and pressure change
[Table 3]
Table 3 Weight change before and after the experiment (kg)
From the results, the required time was almost equal in 1 to 10 times. The change in weight is considered to be because almost all of the transferred propane gas was dissolved and absorbed in kerosene.
[0016]
(Dissolution absorption experiment 3)
As shown in FIG. 3, a 50 kg cylinder (21) containing 20 kg of propane and a 50 kg cylinder (22) containing 20 kg of butane were connected with a high-pressure hose, and the cylinder (22) was placed on the cracker (23).
Next, a 50 kg cylinder was heated with hot water at 40 ° C. and the pressure was increased to 0.9 MPa, and then cylinder valves V 1 (24) and V 2 (25) were opened. When the gas movement started and the weight of the cylinder (22) containing butane increased by 1 kg, V 1 (24) and V 2 (25) were closed, and the time spent for the movement of Proban gas was measured. The standing time until propane gas was dissolved and absorbed in liquefied butane was 3 minutes, and from the fifth time onward, the temperature of the cylinder (22) increased, and thus was prolonged.
The above operation was repeated until the internal pressure of the cylinder containing butane (22) exceeded 0.6 MPa, and the total weight of each of the cylinder containing propane (21) and the cylinder containing butane (22) was measured. The outside temperature was 24.5 ° C. The results are shown in Tables 4 and 5. The change in pressure for propane indicates the change from the pressure just before opening valves V 1 (24) and V 2 (25) to the pressure immediately after closing V 1 (24) and V 2 (25). The change in pressure indicates a change from the pressure immediately before opening the valves V 1 (24) and V 2 (25) to the pressure after dissolution absorption is completed.
[0017]
[Table 4]
Table 4 Time required and pressure change
[Table 5]
Table 5 Weight change before and after the experiment (kg)
From the results, it is considered that almost all of the transferred propane gas was dissolved and absorbed in butane in consideration of measurement errors in weight change. Although the experiment was conducted for 3 minutes, the experiment was performed for 5 minutes and thereafter, because the temperature of the cylinder (22) was increased.
[0020]
(Example 1)
FIG. 4 shows an example of a liquefied petroleum gas filling system for vehicle fuel using an open kerosene tank as a recovery container. This system is filled with liquefied petroleum gas for vehicle fuel according to the following procedure.
procedure:
1. The vehicle is stopped at a predetermined stop position, and the coupling (34) of the filling hose (33) is connected to the valve (32) of the vehicle container (31).
2. Open the valve (32).
3. The three-way valve (36) is operated so that the vehicle container (31) and the collection container (35) communicate with each other. When the gas in the vehicle container (31) is transferred to the recovery container (35) and the pressure in the vehicle container (31) falls to the set pressure of the safety valve (37), the safety valve (37) is closed.
4). The three-way valve (36) is operated so that the vehicle container (31) and the gas meter (38) communicate with each other. At this time, the solenoid valve (46) installed in the air pipe is turned "ON" in conjunction with the operation lever of the three-way valve (36), so that the air valves (42) and (43) are opened at the same time for filling work. To start.
5. The gas meter (38) rotates and filling begins. Overfill prevention (39) is activated and filling is complete.
6). After the filling is completed, when the three-way valve (36) is switched to the closed position, the limit switch (45) is removed, and the air valves (42) and (43) are simultaneously closed. Close valve (32) and remove coupling (34).
(Example 2)
FIG. 5 shows an example of a liquefied petroleum gas filling system for vehicle fuel using a sealed butane tank as a recovery container. This system is filled with liquefied petroleum gas for vehicle fuel according to the following procedure.
procedure:
1. The vehicle is stopped at a predetermined stop position, and the coupling (54) of the filling hose (53) is connected to the valve (52) of the vehicle container (51).
2. Open the valve (52).
3. The three-way valve (56) is operated so that the vehicle container (51) and the recovery container (55) communicate with each other. When the gas in the vehicle container (51) is transferred to the recovery container (55) and the pressure in the vehicle container (51) becomes equal to the pressure in the recovery container (55), the gas transfer stops.
4). The three-way valve (56) is operated so that the vehicle container (51) and the gas meter (60) communicate with each other. At this time, the solenoid valve (58) installed in the air pipe is turned "ON" in conjunction with the operation lever of the three-way valve (56), so that the air valves (64) and (65) are opened simultaneously for filling work. To start.
5. The gas meter (60) rotates and filling begins. Overfill prevention (61) is activated to complete the filling.
6). After the filling is completed, when the three-way valve (56) is switched to the closed position, the limit switch (57) is removed and the air valves (64) and (65) are simultaneously closed. Close valve (52) and remove coupling (54).
[0021]
【The invention's effect】
In the present invention, the vaporized gas in the vehicle container is transferred to the liquefied petroleum gas recovery container before filling the liquefied petroleum gas for vehicle fuel, and the vehicle is filled at a sufficient filling speed from the liquefied petroleum gas storage container for vehicle fuel to the vehicle container. The pressure difference between the liquefied petroleum gas storage container for vehicle fuel and the vehicle container necessary to make it possible to fill the liquefied petroleum gas for fuel can be ensured.
[Brief description of the drawings]
FIG. 1 is a schematic view of a liquefied petroleum gas filling system for vehicle fuel.
FIG. 2 is a schematic view of
FIG. 3 is a schematic view of
FIG. 4 is a schematic view of a liquefied petroleum gas filling system for vehicle fuel using an open kerosene tank.
FIG. 5 is a schematic view of a liquefied petroleum gas filling system for vehicle fuel using a sealed butane tank.
[Explanation of symbols]
40, 62
Claims (6)
前記システムは、
上記連結のうち前記車輛容器と前記回収容器の液相部のみが連通される場合に、前記車輛容器内の液化石油ガスを前記回収容器の液相部に移送して前記車両容器の内圧を所定圧力まで減圧させるようになっており、
前記車両容器の内圧を所定圧力まで減圧させた状態で上記連結のうち前記貯蔵容器と前記車輛容器のみが連通される場合に、車輛燃料用液化石油ガスを前記貯蔵容器から前記車輛容器に充填するようになっている、
車輛燃料用液化石油ガス充填システム。A storage container for storing liquefied petroleum gas for vehicle fuel; a vehicle container mounted on the vehicle; and a liquefied petroleum gas recovery container for recovering liquefied petroleum gas from the vehicle container, wherein the storage container and the vehicle container; Are connected to each other, and the gas phase part of the vehicle container and the liquid phase part of the recovery container are connected, and the recovery container contains a liquid material that dissolves or absorbs liquefied petroleum gas. A liquefied petroleum gas filling system for vehicle fuel comprising an organic compound selected from the group consisting of hydrocarbon compounds, alcohol, kerosene and gasoline having a vapor pressure at 0 C of 0.95 Mpa (absolute pressure),
The system
When only the liquid phase part of the vehicle container and the recovery container is communicated among the connections, the liquefied petroleum gas in the vehicle container is transferred to the liquid phase part of the recovery container to set the internal pressure of the vehicle container to a predetermined value. The pressure is reduced to the pressure,
When only the storage container and the vehicle container are connected in the connection with the internal pressure of the vehicle container being reduced to a predetermined pressure, the vehicle container is filled with liquefied petroleum gas for vehicle fuel from the storage container. It looks like
Liquefied petroleum gas filling system for vehicle fuel.
３方弁の３つの連通口のそれぞれに前記貯蔵容器と、前記車輛容器と、前記回収容器の液相部とを連結し、
前記車輛容器と前記回収容器の液相部が連通されるように前記３方弁を操作して、前記車輛容器内の液化石油ガスを前記回収容器の液相部に移送し、これにより前記車両容器の内圧を所定圧力まで減圧し、
前記貯蔵容器と前記車輛容器が連通されるように前記３方弁を操作して、車輛燃料用液化石油ガスを前記貯蔵容器から前記車輛容器に充填することを含むことを特徴とする車輛燃料用液化石油ガス充填方法。A storage container for storing liquefied petroleum gas for vehicle fuel, a vehicle container mounted on the vehicle, and a liquefied petroleum gas recovery container containing a liquid substance that dissolves or absorbs liquefied petroleum gas, and liquefied petroleum gas from the vehicle container And a liquefied petroleum gas recovery container for recovering the liquefied petroleum gas, wherein the liquid substance is selected from the group consisting of hydrocarbon compounds, alcohol, kerosene and gasoline whose vapor pressure at 25 ° C. is 0.95 Mpa (absolute pressure) or less. Containing organic compounds,
Connecting the storage container, the vehicle container, and the liquid phase part of the recovery container to each of the three communication ports of the three-way valve;
The three-way valve is operated so that the liquid phase part of the vehicle container and the recovery container communicate with each other, and the liquefied petroleum gas in the vehicle container is transferred to the liquid phase part of the recovery container, whereby the vehicle Reduce the internal pressure of the container to the specified pressure,
Operating the three-way valve so that the storage container and the vehicle container communicate with each other, and filling the vehicle container with liquefied petroleum gas for vehicle fuel from the storage container. Liquefied petroleum gas filling method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002263727A JP4154194B2 (en) | 2002-09-10 | 2002-09-10 | Liquefied petroleum gas filling system for vehicle fuel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002263727A JP4154194B2 (en) | 2002-09-10 | 2002-09-10 | Liquefied petroleum gas filling system for vehicle fuel |
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| JP2004100825A JP2004100825A (en) | 2004-04-02 |
| JP4154194B2 true JP4154194B2 (en) | 2008-09-24 |
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| JP2002263727A Expired - Lifetime JP4154194B2 (en) | 2002-09-10 | 2002-09-10 | Liquefied petroleum gas filling system for vehicle fuel |
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