中文摘要：

依据旋风分离器内浓度场分布的特点，建立了旋风分离器内颗粒浓度分布模型，由此提出了一种测量旋风分离器浓度场的双束伽马射线方法。该模型仅需2束射线测量旋风分离器的线平均浓度值，就可以确定模型中的k和ρR参数，进而获得整个旋风分离器横截面的浓度分布。为了验证模型的实用性，首先将以往文献中测量的浓度分布数据带入模型，计算表明该模型可以较好的逼近旋风分离器的浓度场；然后采用^137Cs射线源测量了直径260mm旋风分离器的径向线平均浓度，结果表明实验测量计算的浓度分布与以往文献用其他方法测量结果对比具有很好的一致性。该双束伽马射线方法可以用于旋风分离器的浓度场的测量和监测。

英文摘要：

A method for measuring the concentration field in the cyclone with two-beam gamma ray has been put forward based on the characteristics of concentration distribution in the cyclone. The model con- tains the undetermined coefficients （k and PR） , which can be calculated from the only two path average concentrations that are measured by gamma ray device. The model was discussed with previous literature data for its reasonable. Also the experiment was carried out on the diameter 260 mm cyclone for measuring path average concentrations by 137Cs radioactive source. The calculated results was compared with previous literature, the curves are agreement. So the two-beam gamma-ray method could be used in measuring and monitoring the concentration distribution in the cyclone.