布朗工艺一段转化炉的模拟计算

在建立炉膛燃烧传热模型和管内气固相催化反应模型的基础上对布朗工艺合成氨装置一段炉辐射段进行模拟计算.炉膛燃烧传热过程采用Hottle区域法建立三维辐射换热模型,与管内的气固相催化反应动力学模型迭代求解,得出了炉膛三维温度分布以及管内温度、压力、组成随高度的分布.计算结果与实测值基本吻合.由于炉膛燃烧传热模型采用三维模型,与传统的一维和二维模型比较,计算结果更为精确.计算方法和结果对于节能降耗以及设备的改进等都有非常重要的意义.

Simulated Calculation of Primary Reformer of Branu Synthetic Ammonia Plant

The heat transfer model of heart combustion and reaction kinetics model of gas-solid catalytic reaction in tube are establish to simulate the process of radiant section of primary reformer of Branu synthetic ammonia plant. Hottle zone method is used to established three-dimensional radiative heat transfer model in heart combustion and it is combined with the reaction kinetics model of gas-solid catalytic reaction to calculate three-dimensional temperature distribution of hearth and the distribution of temperature, pressure and composition in tube. The simulation results are coincident with true value. Compared with conventional method, three-dlmensional model used in the heat transfer process of hearth makes the results more accurate. The method and results are beneficial to energy saving, consumption reducing and equipment improvement.