合成气制烯烃合成单元热交换方案优化与热交换器选型设计

Heat Exchange Scheme Optimization and Heat Exchanger Selection Design of Syngas-to-Olefin Synthesis Unit

通过分析合成气制烯烃合成单元运行问题,对其热交换方案进行优化,并减少了热交换器数量。根据传热条件,选型缠绕管式换热器并开展热工计算设计。结果表明,在传热推动力约降低至原来的1/9时,缠绕管式换热器传热系数依然可以达到同外形尺寸管壳式换热器的2倍左右,而换热面积更是达到4倍左右,因此可以采用缠绕管式换热器代替原管壳式换热器。中试装置的改造思路及缠绕管式换热器的热工计算设计适用于其他各类单相流缠绕管式换热器的选型设计及优化。

By analyzing the operation problems of the synthesis gas-to-olefin synthesis unit,its heat exchange scheme was optimized and the number of heat exchangers was reduced.According to the heat transfer conditions,the wound tube heat exchanger is selected and the thermal calculation design is carried out.The results show that when the heat transfer driving force is reduced to about 1/9 of the original,the heat transfer coefficient of the wound tube heat exchanger can still reach about 2 times that of the shell and tube heat exchanger of the same size,and the heat exchange area reaches about 4 times,so the wound tube heat exchanger can be used to replace the original shell and tube heat exchanger.The transformation idea of the pilot plant and the thermal calculation design of the wound tube heat exchanger are suitable for the selection,design and optimization of other types of single-phase flow wound tube heat exchangers.