制氢转化炉管壁温度场研究

Study on tube wall temperature profile of steam reformer

以某厂实际运行数据为基础,并结合制氢装置工艺专利商所提供的转化炉操作参数,运用工程设计软件对制氢转化炉管壁温度进行计算分析。分别考虑了处理量、反应介质出口温度、催化剂传热性能、水碳比、火焰长度、炉管长度及转化炉型等因素,结果表明,顶烧式转化炉管壁温度在反应初期快速上升,在炉管上部火焰长度位置附近达到温度峰值,而后稍有回落,在炉管下部出现第二个高点,温度和第一个壁温高点接近;侧烧式制氢炉管壁温度随反应的进行逐渐升高,在反应介质出口处达到最高点;阶梯式制氢炉管壁温度的分布类似于多段的侧烧炉。

Based on the actual operation data of a refinery and combined with the operation parameters of reformer provided by the process licensor, the tube wall temperature of steam reformer was calculated and analyzed by using engineering design software. The factors such as unit capacity, outlet temperature of reaction medium, heat transfer of catalyst, water carbon ratio, flame length, tube length and reformer type were considered respectively. The results show that the tube wall temperature of top fired steam reformer increases rapidly in the initial stage of reaction, reaches the peak temperature near the flame length at the upper part of the tube, and then decreases slightly, the second wall temperature high point appears in the lower part of the tube, which is close to the first wall temperature high point. The tube wall temperature of the side fired reformer increases gradually with the reaction and reaches the highest point at the outlet of the reaction medium. The tube wall temperature distribution of the terrace wall fired reformer is similar to that of the multi-step side fired reformer.