Kiln Wall Thickness Of Computer-aided Infrared Perspective And Related Technologies

Rotary kiln is key equipment in the metallurgical and architectural industry. Its operations are directly related to the yield, qualities, and costs of product. The variety of its surface temperature field synthetically and indirectly reflected the change of liner and materiel in rotary kiln. The wall thickness and the wear and tear of firebrick are timely got through monitoring the surface temperature of multi-rotary-kiln, which can prolong the lifetime of firebrick, and reduce stopping-rotary- kiln times. Therefore, monitoring the surface temperature of rotary kiln is very important.In this paper, an in-depth study on the wall thickness of rotary kiln is made on the basis of the general research about the technique of InfraRed Computerized Axial Tomograpghy (IR-CAT) at home and abroad, and of the system of monitoring the surface temperature and wall thickness of multi-rotary-kiln by infrared ray. According to actual condition, a model of wall thickness of rotary kiln is established. The constant coefficients in the model, including thermal conductivity, heat transfer coefficient, Fourier coefficient and contact resistance, are closely calculated. A formula of contact resistance is draw from a great deal of data of surface and inner temperature of rotary kiln. The wall thickness of rotary kiln is simulated by MATLAB. The simulation result is transmitted from MATLAB to DELPHI through a group of interface functions compiled by VC++. The basic graphs-circle and line are analyzed by the means of the technique of Visualization in Scientific Computing (ViSC) and the Bresenham arithmetic, and are realized the visualization of the wall thickness. The contents of communication between master computer and slaver computer are designed and the error control technique, the idea of multi-thread and the embedded assembly language are applied to realize the temperature data transmission and graph transmission, which largely improved the speed of transmission and the reliability and stability of system.The application of the research to the system of monitoring the surface temperature and wall thickness of multi-rotary-kiln can make workers directly know the wall thickness working condition and greatly improve the efficiency of rotary kiln.