Mathematical Simulation Of Furnace Wall Temperature Field And Inner Wall Sluggish Of Reaction Shaft

In the process of copper flash smelting, lining temperature of reaction shaft and its inner wall sluggish play a very important role in lining life. Up to now, however, there is no practical technique applied to real-time detection of reaction shaft's inner wall sluggish. According to the practical problem to be urgently solved, we manage to realize the real-time detection of furnace wall temperature field and inner wall sluggish of reaction shaft by using computer simulation and soft measure in the research.Based on the heat transmission theory and the process mechanics of growth and decline of reaction shaft sluggish, the mathematical models for furnace wall temperature field of reaction shaft under three-dimensional circular cylindrical coordinates and its inner wall sluggish are established. Besides, the on-line simulation software (FFHS v1.0) with independent intellectual property has been developed, which is programmed by Visual C#.NET and SQL Server database.FFHS collects DCS data by OPC technique, which can monitor the process of copper flash smelting and simulate the furnace wall temperature field and inner wall sluggish of reaction shaft. The test results show that it is in agreement with the real conditions.FFHS can run under off-line status too. Both the influence of water jacket space on furnace wall temperature field distributing and the influence of gas temperature on the sluggish thickness distributing of inner wall are simulated by FFHS under off-line status, the relationship was distinctly described by data and graphs.For optimizing the solving algorithm of temperature field, the method of replacing adjacent point with second adjacent point at difference grid is adopted to construct difference format,which improves the traditional finite difference algorithm. The experiment result shows the convergence is accelerated greatly.Finally, an intelligent transfer interpolation algorithm is studied by using computer graph technique, which can read data directly from the graphs of gas's absorption rate and emissivity, and solve the problem of inquiring absorption rate and emissivity of gas radiation under different temperature and PS product when calculating heat radiation.