Research Of Ceramics Heat Regenerators Heat Transfer And Resistance Performance

As the rapid development of petrochemical industry and increasingly strict environmental policy, the Regenerative Thermal Oxidizer (RTO), which could treat waste gas, is widely used in civil petrochemical plant. Ceramic heat retainer is the key component in RTO, which carries the functions of heat retain and release, and the critical technology of ceramic heat retainer is heat transfer and resistance performance. So far,80%of domestic RTO are imported expensively. The domestic RTO vendors are still seeking for the heat transfer and resistance performance of ceramic heat retainer. Reliable theoretical calculation method and experimental data are lacked to support the project design basis. The study of heat transfer and resistance performance of ceramic heat retainer has theoretical significance and practical application value of project.Base on the heat transfer theory and fluid mechanics, this paper adopts modern experimental technique to investigate ceramic heat retainer against its weakly research of heat transfer and resistance performance. The main research work is follows:(1) By using the basic theory of heat transfer and fluid mechanics, the paper analyze the relationship between flow rate, reversal time, heat retainer height and heat transfer performance, we conclude that the integrated heat transfer coefficient of heat retainer increases and its trend gradually slowdown as gas flow increases; The heat retainer preheat air temperature decreases as reversal time increases, the exhaust gas temperature increases as reversal time increases, and the increase and decrease trend gradually slowdown; The heat retainer preheat air temperature increases as heat retainer height increases, the exhaust gas temperature increases as reversal time increases, and the decrease and increase trend gradually slowdown.(2) Building a set of RTO test bench and finishing drawings of RTO, switching valves, burner, duct, platform and ladder, electrical and instrumental system. Compiling quantitative relation of heat retainer specific area, gas flow, reversal time, heat retainer height and preheat air temperature, resistance performance. And form data base. Through hot condition experiment, the paper verifies heat transfer and resistance performance of three kinds of honeycomb ceramic heat retainers and two kinds of ceramic heat retainer filler. The paper explores the influence of ceramic heat retainer height, wall thickness, groove type and specific surface area to heat transfer and resistance performance of ceramic heat retainer. The paper also studies influence of operating parameters such as flue gas velocity, reversal time and chamber temperature to heat transfer and resistance performance of ceramic heat retainer, which could optimize the final operating parameters.