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    • 4. 发明授权
    • Method and apparatus for sampling and analysis of furnace off-gases
    • 用于取样和分析炉废气的方法和装置
    • US5777241A
    • 1998-07-07
    • US795861
    • 1997-02-06
    • Euan J. Evenson
    • Euan J. Evenson
    • G01N1/22
    • G01N1/2258G01N2001/2282G01N2001/2285
    • A furnace system includes a furnace and a furnace monitoring and control system having a gas analyzer for analyzing the composition of furnace off-gases, and a sampling tube or probe used to obtain a high temperature off-gas sample for delivery to the gas analyzer. Gas samples are drawn to the gas analyzer, via the probe, by a vacuum. The probe is formed as a generally cylindrical or polygonally shaped hollow tube, which when mounted in the system defines a generally vertically extending elongated gas passage along which sample gas is drawn, and whereby sample gas flow in the passage is in a generally vertical direction. The probe is provided with upper and lower openings which extend into the gas passage. The lower opening is provided in gaseous communication with the furnace off-gas stream and is formed so as to permit the substantially unhindered movement of particulate matter, such as dust, downwardly along the gas passage and outwardly through the open bottom end. The upper opening is provided in gaseous communication with the gas analyzer, and a filter is removably positioned across the upper opening to prevent dust and other particulate matter entrained in the sample off-gas from moving through the upper opening and into the gas analyzer. To cool the sample gas and prolong the filter life, part of the probe is provided with a double sidewall construction so as to define a partitioned annular chamber extending about at least part of the gas passage along which cooling fluid may move.
    • 炉系统包括炉和炉监测和控制系统,其具有用于分析炉废气的组成的气体分析器,以及用于获得用于输送到气体分析器的高温废气样品的采样管或探针。 气体样品通过探头通过真空吸入气体分析仪。 探针形成为大致圆柱形或多边形的中空管,当安装在系统中时,该管形成大致垂直延伸的细长气体通道,抽取气体沿着该气体通道抽吸,并且通道中的样品气体在大致垂直的方向上流动。 探针设置有延伸到气体通道中的上开口和下开口。 下开口与炉尾气体气态连通地设置,并且形成为允许诸如灰尘的颗粒物质基本上不受阻碍地沿着气体通道向下移动,并且向外通过敞开的底端。 上部开口与气体分析器气体连通地设置,并且过滤器可移除地定位在上部开口上,以防止夹带在样品废气中的灰尘和其它颗粒物质通过上部开口移动到气体分析器中。 为了冷却样品气体并延长过滤器的使用寿命,探头的一部分设置有双重侧壁结构,以便限定围绕冷却流体可以移动的气体通道的至少一部分延伸的分隔的环形室。