废杂铜冶炼过程温度及压力测量关键技术研究
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摘要
在经济快速发展的今天,铜的需求日益增长,但是地球上的铜矿资源十分有限,因此废杂铜冶炼技术的发展显得尤为重要。在废杂铜冶炼过程中,炉膛温度场及炉膛压力对环保精炼炉的寿命以及铜品质影响极大,只有知道炉膛的确切温度分布,才能很好的控制铜品质,然而到目前为止,在实际生活中对炉膛温度场进行实时在线检测技术还很不成熟。本文针对这一急需解决的实际问题,尝试利用计算机仿真技术,以二重数值仿真方法解决离线数值仿真结果向在线动态仿真过程的移植问题,实现对炉内温度场的实时动态显示,有效地实现了炉内工况的监测与诊断。通过建立炉膛压力测量回路的信号处理模型,分析和研究了炉膛压力测量信号采集处理时减少系统波动的办法,并用仿真方法验证了该处理模型的优点和合理性。
本文的主要工作如下：
1)本文对废杂铜冶炼过程中的温度场、压力场、速度场等多场耦合数值方法进行了阐述,应用k-ε双方程气相湍流模型、热通量法辐射换热模型等多种模型建立计算的数学模型以及多块非均匀结构化网格划分技术对环保精炼炉建立物理模型。
2)本文对炉膛温度场的二重数值仿真计算方法进行了详细论述与推导,应用二重仿真方法对炉膛内的温度场进行了计算。在运行工况变化不是很大的情况下,通过将炉内温度场分布直接与操作参数相关联,通过将操作参数对炉内温度场的影响进行线性化处理,从而得到温度场与操作参数的线性关系式,实现对炉内温度场的实时动态显示。
3)本文提出了炉膛压力测量回路的信号处理模型,对如何进行压力测量信号的采集处理以减少系统波动的方法进行了详细的分析。从仿真结果来看,此模型完全可以满足环保精炼炉炉膛压力控制的工艺要求。
本文的研究表明,采用合适的数学模型和计算方法,进行环保精炼炉炉内过程的数值模拟是可行的,对炉膛内温度场、压力场、速度场的分布特性的模拟是合理的,反应了实际的炉内流动、传热过程,本文的研究结果,对优化生产过程操作参数,使环保精炼炉实现高效安全、稳定运行具有重要的理论与实践意义。
The demand of copper will increase as the rapid development of economy, but the copper resources of world are very limited, the development of scrap copper smelting technology is especially important. In the process of scrap copper smelting, the furnace temperature field and pressure have great effects on environmental refining furnace, only know the exact temperature distribution in the furnace in order to better control the quality of copper, however, at present the technology for real-time detection on-line to furnace temperature field isn't rip yet. According to the practical problem to be urgently solved, we manage to solve the problem that the results of off-line numerical simulation transplant into on-line dynamic simulation with the two-stage numerical simulation method by using computer simulation technology, and realized the dynamic real-time display of temperature field, achieved to monitor and diagnose to furnace condition effectively. Through establish the signal processing model for measurement loop of furnace pressure, analysis and research the method for reducing the system fluctuation when data acquisition and signal processing of furnace pressure and use the simulation method to verify the advantages and rationality of the processing model.
The main work is as follows:
1) This paper described coupling numerical simulation method of multi-field, including temperature field, pressure field, velocity field, and calculated the mathematical model with applying theκ-εmodel of two-way gas turbulence, the model of radiant heat transfer using heat flux and other models and made multi-block non-uniform structured meshing technology to build physical model for environmental refining furnace.
2) The paper discussed in detail and deduced the two-stage numerical simulation calculation method of furnace field, and calculated the furnace field with applying two-stage simulation method. When the operating conditions have changed little, put the furnace temperature field distribution to be concerned with operating parameters and to linearize the influence that operating parameters on furnace temperature field, resulting in linear relationship between temperature field and operating parameters to realize the real-time dynamic display to temperature field
3) This paper introduce the signal processing model for measurement loop of furnace pressure, the method of acquiring and treating pressure measurement signal to reduce the fluctuation of the system was studied and analyzed in detail. This model can meet the technology requirements of furnace pressure control of environmental refining furnace from the simulation results.
This thesis shows that numerical simulation of furnace process in environmental refining furnace with proper mathematical models and calculation method is viable. The numerical simulation of distribution of temperature field, pressure field and velocity field in furnace are reasonable and they can reveal the actual, heat transfer in furnace. The above results are of important theoretical and practical meaning for optimizing operation parameters, making environmental refining furnace running steady and safely with high-efficiency.
本文的主要工作如下：
1)本文对废杂铜冶炼过程中的温度场、压力场、速度场等多场耦合数值方法进行了阐述,应用k-ε双方程气相湍流模型、热通量法辐射换热模型等多种模型建立计算的数学模型以及多块非均匀结构化网格划分技术对环保精炼炉建立物理模型。
2)本文对炉膛温度场的二重数值仿真计算方法进行了详细论述与推导,应用二重仿真方法对炉膛内的温度场进行了计算。在运行工况变化不是很大的情况下,通过将炉内温度场分布直接与操作参数相关联,通过将操作参数对炉内温度场的影响进行线性化处理,从而得到温度场与操作参数的线性关系式,实现对炉内温度场的实时动态显示。
3)本文提出了炉膛压力测量回路的信号处理模型,对如何进行压力测量信号的采集处理以减少系统波动的方法进行了详细的分析。从仿真结果来看,此模型完全可以满足环保精炼炉炉膛压力控制的工艺要求。
本文的研究表明,采用合适的数学模型和计算方法,进行环保精炼炉炉内过程的数值模拟是可行的,对炉膛内温度场、压力场、速度场的分布特性的模拟是合理的,反应了实际的炉内流动、传热过程,本文的研究结果,对优化生产过程操作参数,使环保精炼炉实现高效安全、稳定运行具有重要的理论与实践意义。
The demand of copper will increase as the rapid development of economy, but the copper resources of world are very limited, the development of scrap copper smelting technology is especially important. In the process of scrap copper smelting, the furnace temperature field and pressure have great effects on environmental refining furnace, only know the exact temperature distribution in the furnace in order to better control the quality of copper, however, at present the technology for real-time detection on-line to furnace temperature field isn't rip yet. According to the practical problem to be urgently solved, we manage to solve the problem that the results of off-line numerical simulation transplant into on-line dynamic simulation with the two-stage numerical simulation method by using computer simulation technology, and realized the dynamic real-time display of temperature field, achieved to monitor and diagnose to furnace condition effectively. Through establish the signal processing model for measurement loop of furnace pressure, analysis and research the method for reducing the system fluctuation when data acquisition and signal processing of furnace pressure and use the simulation method to verify the advantages and rationality of the processing model.
The main work is as follows:
1) This paper described coupling numerical simulation method of multi-field, including temperature field, pressure field, velocity field, and calculated the mathematical model with applying theκ-εmodel of two-way gas turbulence, the model of radiant heat transfer using heat flux and other models and made multi-block non-uniform structured meshing technology to build physical model for environmental refining furnace.
2) The paper discussed in detail and deduced the two-stage numerical simulation calculation method of furnace field, and calculated the furnace field with applying two-stage simulation method. When the operating conditions have changed little, put the furnace temperature field distribution to be concerned with operating parameters and to linearize the influence that operating parameters on furnace temperature field, resulting in linear relationship between temperature field and operating parameters to realize the real-time dynamic display to temperature field
3) This paper introduce the signal processing model for measurement loop of furnace pressure, the method of acquiring and treating pressure measurement signal to reduce the fluctuation of the system was studied and analyzed in detail. This model can meet the technology requirements of furnace pressure control of environmental refining furnace from the simulation results.
This thesis shows that numerical simulation of furnace process in environmental refining furnace with proper mathematical models and calculation method is viable. The numerical simulation of distribution of temperature field, pressure field and velocity field in furnace are reasonable and they can reveal the actual, heat transfer in furnace. The above results are of important theoretical and practical meaning for optimizing operation parameters, making environmental refining furnace running steady and safely with high-efficiency.
引文
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