Collection/expansion type mixing module used for gas transmission system of atomic fluorescence spectrometer

一种用于原子荧光光谱仪气体传输系统的集扩式混匀模块

Abstract

本发明公开了一种用于原子荧光光谱仪气体传输系统的集扩式混匀模块,在混合气体输入区和混合气体输出区之间通过集扩式混匀模块连通,包括多个拐角。模块两端的第一、二径向通道之间通过轴向通道连通并形成拐角,轴向通道的截面为圆台状,两端分别是收缩口和扩张口。在混合气体输入区内不均匀的被测金属气态氢化物、燃气(氢气)、水蒸气和氩气等的混合气体,在曲折中前进,通过压缩扩张拐角等不断碰撞充分混合均匀,得到了稳定的层流燃烧火焰,增加了测试结果的稳定性。混匀通道具有拐角,轴向通道还具有收缩口和扩张口,配合以内壁上的突起,并通过大量实验得到收缩口与水平面的最佳夹角范围,以及径向通道的高度与轴向通道的长度的最优比值。
The invention discloses a collection/expansion type mixing module used for a gas transmission system of an atomic fluorescence spectrometer. A mixed gas input area and a mixed gas output area are communicated through the collection/expansion type mixing module, and the collection/expansion type mixing module has multiple corners. A first radial passage and a second radial passage at two ends of the module are communicated through an axial passage and form a corner; the cross section of the axial passage takes the shape of a round table; and a contraction port and an expansion port are arranged at two ends respectively. In the mixed gas input area, uneven mixed gas of to-be-measured metal gaseous hydride, gas (hydrogen), water vapor, argon and the like advances in zigzag, and is continuously crashed and mixed fully and uniformly through compression and expansion corners and the like, so as to obtain stable laminar flow combustion flames, as a result, the stability of the testing result is improved. The mixing passage is provided with the corners, and the axial passage is provided with the contraction port and the expansion port; in coordination with bosses on the inner wall and through multiple times of experiments, the range of the optimal included angle between the contraction port and the horizontal level can be obtained, as well as the optimal specific value of the height of the radial passages to the length of the axial passage.

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