管壳式甲醇含成反应器的最大允许管径和最大传热温差

Maximum Tube Diameter and Temperature Difference of Heat Transfer for Tube-shell Methanol Synthesis Reactor

从固定床反应器的操作热稳定性出发，对管壳式低压甲醇合成反应器的最大允许管径和最大传热温差进行了计算。计算结果表明，列管内径应小于φ70mm，合适管径为φ（42～46）mm×2mm。冷却介质温度应大于208℃。有中压蒸汽管网时，沸水温度取250℃；无中压蒸汽管网时，沸水温度可稍低。

In this paper, in view of the thermal stability of fixed-bed reactor,maximum tube diameter and temperature difference of heat transfer for low--pressure tube-shell methanol synthesis reactor were calculated. Results show that, inner diameter of the tube should be less than 70mm and the suitable diameteris between #2mm X Zmm and +46mm X Zmm. The temperature of cooling media should be over 208'C oWhen there is a middle-pressure steam network, the temperature of boiling water should be 250 C, otherwise it may be lower.