Abstract: A real-time dynamic detection method and apparatus for measuring the concentration of a certain component in gas mixture has been developed to meet the demand in chemical production process. The principles，structure and calibration method of the equipment are described in details. The apparatus has been successfully examined in the dynamic monitoring of the tracer gas concentration in a fluidized bed cold model，and the experimental results proved that the apparatus has features like easy operation，generalized application and high accuracy.

摘要： 化工生产过程中，经常需要对混合气体中某一组分的含量进行实时检测。本文提出了一种利用热导检测器实时检测混合气体中某一组分浓度变化的方法及装置，详细介绍了该新型检测系统的原理、构造和使用方法。采用该装置对某流化床冷态模型中示踪气体的浓度进行了检测验证，实验结果表明，该套装置操作简单，通用性强，准确度较高。