基于多损耗灰体假设的新型转炉炼钢测温模型研究
发布时间：2018-08-24 11:41
【摘要】：转炉炼钢终点温度预测的自动化是炼钢工艺中的一个难题。目前,只能通过炉气分析法或者人工经验进行预测。但是炉气分析法价格昂贵且维护成本高,而人工经验命中率低。由于光辐射测温的非接触式测量性质,因此易于维护。然而由于炉口火焰的非黑体性质,黑体辐射公式不能直接使用。针对上述问题,基于普朗克公式,利用维恩近似,引入双波长测温公式,进行色温公式的推导。基于该色温公式,结合光纤光谱仪采集的光谱数据,对光谱光强进行损耗形式假设以建立模型。利用类比实验推导出相加项的表达形式,结合一段光谱数据求解温度,从而建立一种新型的用于终点温度判断的模型。在模型应用过程中,考虑到生产环境复杂,光谱数据以及温度数据中存在噪声,因此使用傅里叶滤波以及连续平滑滤波方法在空间和时间角度对数据进行去噪声处理,使温度结果更准确,从而对光谱测温模型进行修正。利用望远系统、光纤光谱仪、光纤以及计算机开发生产环境中使用的平台,使用C、MATLAB以及L abView编写现场以及仿真环境下的软件程序,将修正之后的光谱测温模型应用到该系统中。该测温系统经现场测试,±20℃内的命中率在90%以上,完全满足实际生产要求,对生产效率的提高具有重要的意义。
[Abstract]:The automation of terminal temperature prediction in converter steelmaking is a difficult problem in steelmaking process. At present, only through furnace gas analysis or artificial experience to predict. But the furnace gas analysis method is expensive and the maintenance cost is high, and the hit rate of artificial experience is low. Because of the non-contact measurement property of light radiation temperature measurement, it is easy to maintain. However, the blackbody radiation formula can not be used directly because of the non-blackbody nature of the furnace mouth flame. In order to solve the above problems, based on Planck formula, the formula of color temperature is derived by introducing the formula of two-wavelength temperature measurement by using the Wynn approximation. Based on the formula of color temperature and the spectral data collected by optical fiber spectrometer, the loss form of spectral intensity is assumed to establish the model. In this paper, the expression of the additive term is deduced by analogy experiment, and the temperature is solved by a section of spectral data, thus a new model for judging the terminal temperature is established. In the application of the model, considering the complexity of the production environment and the noise in the spectral data and the temperature data, the method of Fourier filter and continuous smoothing filter is used to process the data in spatial and time angle. The model of spectral temperature measurement is modified by making the temperature result more accurate. The modified spectral temperature measurement model is applied to the system by using the terrace of telescope system, optical fiber spectrometer, optical fiber and computer development and production environment, and the software program of field and simulation environment is compiled by using C _ (C) MATLAB and L abView. The field test shows that the hit ratio of the temperature measuring system is above 90% within 卤20 鈩，
本文编号：2200715
[Abstract]:The automation of terminal temperature prediction in converter steelmaking is a difficult problem in steelmaking process. At present, only through furnace gas analysis or artificial experience to predict. But the furnace gas analysis method is expensive and the maintenance cost is high, and the hit rate of artificial experience is low. Because of the non-contact measurement property of light radiation temperature measurement, it is easy to maintain. However, the blackbody radiation formula can not be used directly because of the non-blackbody nature of the furnace mouth flame. In order to solve the above problems, based on Planck formula, the formula of color temperature is derived by introducing the formula of two-wavelength temperature measurement by using the Wynn approximation. Based on the formula of color temperature and the spectral data collected by optical fiber spectrometer, the loss form of spectral intensity is assumed to establish the model. In this paper, the expression of the additive term is deduced by analogy experiment, and the temperature is solved by a section of spectral data, thus a new model for judging the terminal temperature is established. In the application of the model, considering the complexity of the production environment and the noise in the spectral data and the temperature data, the method of Fourier filter and continuous smoothing filter is used to process the data in spatial and time angle. The model of spectral temperature measurement is modified by making the temperature result more accurate. The modified spectral temperature measurement model is applied to the system by using the terrace of telescope system, optical fiber spectrometer, optical fiber and computer development and production environment, and the software program of field and simulation environment is compiled by using C _ (C) MATLAB and L abView. The field test shows that the hit ratio of the temperature measuring system is above 90% within 卤20 鈩，
本文编号：2200715
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