烟道气中O_2,CO及CO_2含量的气相色谱分析方法

报道了使用一台单气路、单检测器 (TCD)气相色谱仪分析烟道气中 O2 ,CO及 CO2 含量的研究结果 .通过对原有气相色谱仪的气路系统进行改造 ,在气路中连接一个普通的六通阀 ,将原来的单色谱柱单气路系统 ,改变为双色谱柱单气路系统 .在分析过程中 ,该方法采用恒定色谱柱温操作 ,通过改变六通阀的位置 ,依次将色谱柱 1 (GDX- 1 0 1 )和色谱柱 2 (TDX- 0 1 )切换到气路系统中 .色谱柱 1用于分析 CO2 的含量 ,色谱柱 2用于分析 O2 及 CO的含量 .被分析样品通过定量管引入色谱柱中进行分离分析 ,分析结果采用外标法进行定量 .该分析方法与原来的奥氏气体分析法相比 ,操作简便 ,分析精度得到了较大的提高 ,同时也缩短了分析时间 ,在生产控制中有很好的实用价值 .

Determination of Concentrations of O2, CO and C O2 in the Flue Gas by Gas Chromatography

A method of determining the contents of O 2,CO and C O 2 in flue gas is proposed with a modified single-way single-detector gas chromatograph. The modified gas chromatograph is obtained by adding a six-way valve to the gas circuit of an ordinary gas chromatograph, so the original monochromatographic column single-way system is modified into a dichromatographic column single-way system. Two chromatographic columns can be switched in the gas way by changing the positions of the six-way valve. The column one marked with GDX-101 is used for analyzing the content of C O 2, and the column two marked with TDX-01 is used for analyzing the contents of O 2 and CO. The analysis operation is accomplished at a given temperature. Sample is introduced into chromatographic columns through a sampling pipe. Compared with traditional Orsat gas analysis method, the operation of this new method is easier, the measurement is more precise, and the operating time is less.