原位式激光气体分析仪在轧钢加热炉中的应用

Application of In-Situ Laser Gas Analyzer in Steel Rolling Heating Furnace

针对轧钢加热炉中钢坯易出现氧化烧结及能源损耗过大的问题,提出应用原位式激光气体分析仪实时监测工艺气体。通过半导体激光器发出特定波长的光穿过加热炉工艺气到达探测器上,利用频率扫描技术和谐波检测等技术将得到的谐波信号反演得到气体浓度。将O_(2)浓度和CO浓度测量分析反馈给加热控制系统,系统根据设定值调节空气和煤气流量大小,降低钢坯的氧化烧结率和工序损耗,同时减少气体排放对环境的污染。

Aiming to address the issues of billet oxidation and sintering,as well as excessive energy loss in the rolling furnace,a proposal is made for real-time monitoring of process gas using an in-situ laser gas analyzer.The semiconductor laser emits light at a specific wavelength through the heating furnace′s process gas,which then reaches the detector.By utilizing frequency scanning technology and harmonic detection technology,the harmonic signal is inverted to obtain gas concentration measurements.The measurement and analysis of O_(2) concentration and CO concentration are fed back to the heating control system,which adjusts the air and gas flow rates according to the set values,reducing the oxidation sintering rate and process losses of steel billets,while reducing gas emissions and environmental pollution.