室状加热炉烘炉过程数学模型及其数值模拟

Baking process model and numerical simulation for the chamber furnace

以某公司拟建的高温蓄热式室状加热炉为研究对象，建立了烘炉过程传热数学模型。其中包括：炉膛热平衡数学模型、复合炉墙传热过程数学模型和废气温度计算模型等。并运用数值差分技术和四阶龙格一库塔法进行了数值注解，开发了计算机数值仿真软件包，对不同燃料量下的烘炉过程进行了优化计算。结果表明：对拟建的高温实验炉，为了保证在90分钟内使炉温达到所需的温度要求，其最佳煤气流量应该控制在70～90m^3／h。

A heat transfer mathematical model is set up about the baking process of some regenerative chamber furnace to be built, including heat balance of furnace hearth model, composit wall heat transfer model and exhaust gas temperature calcualation model. Finite difference method and Runge- Kutta method are adopted during the numerical solution procedure, and a computer numerical software package is developed to optimizing the baking process of different fuel flow. The results indicates the optimal fuel flow should be controlled between 70 and 90 m^3 /h in order to ensure the furnace temperature reaches the desired value in 90 minutes for the experimental high - temperature furnace. This paper provides the theoretical basis for the next experimental research and a successful reference cases for baking system of other heating furnaces.