GAS SUPPLY METHOD AND GAS SAMPLER

To supply an appropriate amount of sample gas to the column of a gas analyzer with good accuracy using a gas sampler.SOLUTION: A gas sampler (30) comprises a connection unit (C1) connectable to an introduction piping (21) which is connected to a sample tank (200), a sample loop (PL), a switching val...

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Bibliographische Detailangaben
Hauptverfasser: LU WENJIAN, SHIBAMOTO SHIGEAKI, SATO AYAKA
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To supply an appropriate amount of sample gas to the column of a gas analyzer with good accuracy using a gas sampler.SOLUTION: A gas sampler (30) comprises a connection unit (C1) connectable to an introduction piping (21) which is connected to a sample tank (200), a sample loop (PL), a switching valve (V1) for switching a connection state between the connection unit (C1) and the sample loop (PL), a pump (31), and a control device (100). A buffer path (Pb) between the sample loop and the pump is configured to be selectively connectable to one of a plurality of buffer tanks differing in volumetric capacity. The volumetric capacity of the buffer path is larger by a prescribed amount than the volumetric capacity of the introduction piping. The control device actuates the pump while placing the switching valve in a closed state and turns the inside of the buffer path into negative pressure, and then places the switching valve in an open state while stopping the pump, thereby filling the sample loop with a sample gas through the negative pressure of the buffer path.SELECTED DRAWING: Figure 1 【課題】ガスサンプラを用いて適量の試料ガスを精度よくガス分析装置のカラムに供給する。【解決手段】ガスサンプラ(30)は、サンプルタンク(200)に接続された導入配管(21)に接続可能な接続部(C1)と、サンプルループ(PL)と、接続部(C1)とサンプルループ(PL)との接続状態を切り替える切替バルブ(V1)と、ポンプ(31)と、制御装置(100)とを備える。サンプルループとポンプとの間のバッファ流路(Pb)は、容積の異なる複数のバッファタンクのうちのいずれかに選択的に接続可能に構成される。バッファ流路の容積は導入配管の容積よりも所定量大きい。制御装置は、切替バルブを閉状態にしつつポンプを作動してバッファ流路の内部を負圧にし、その後にポンプを停止しつつ切替バルブを開状態にすることによってバッファ流路の負圧を利用して試料ガスをサンプルループに充填する。【選択図】図1