F-T合成反应器汽包换热系统动态响应研究  

A study on dynamic behaviors of heat exchange system using steam drum in F-T synthesis reactor

作　　者：樊伟[1,2] 郝栩[2] 相宏伟[2] 徐元源[2] 李永旺[2] 

机构地区：[1]中国科学院研究生院,北京100039 [2]中国科学院山西煤炭化学研究所,山西太原030001

出　　处：《现代化工》2010年第3期64-68,共5页Modern Chemical Industry

基　　金：自然科学基金重大项目-0-1(20590361/B01);"863"计划-科技部-0-1(20071FT-1);"973"计划-科技部-0-1

摘　　要：建立了1个考虑自蒸发作用的汽包动态模型,引入自蒸发速度计算公式,将该汽包模型作为费托合成反应器的换热系统在Aspen Dynamics中进行动态模拟。考察了当存在反应器入口液相温度变化、反应器设定温度变化及新鲜气流量变化等扰动时系统的动态响应。结果表明使用"Flash"汽包模型对反应器温度波动的计算结果要比使用自蒸发汽包模型时偏小;与用固定温度冷却水移热相比,使用汽包换热更加有利于对反应器温度的控制。水蒸发压力差变化的补偿作用使得汽包蒸发面积对汽包自蒸发速率的影响很小。随着汽包-换热管体系中水体积以及水蒸气体积的增加,反应器温度的最大波动值变大;但随着传热温差的减小,水蒸气的体积变化对温度波动的作用减弱。With a steam drum （SD） model that contains the effect of evaporation, the dynamic response of heat exchange system for F-T synthesis reactor has been studied with an Aspen Dynamic software. The main perturbations are the following ： some change of slurry temperature at the reactor inlet, the change of set point of the reactor temperature and the change of the flux of fresh gas. As a result, the fluctuation of the reactor temperature is smaller when the steam drum is calculated with the ＂Flash＂ module than that the ＂serf-evaporation＂ steam drum module is used. It is shown that the steam drum gains more advantage in adjusting the reactor temperature compared with the water of constant temperature in removing the reaction heat. Since the compensation of the change of pressure difference for the water evaporation, the effect of the evaporation area on the flux of evaporation in steam drum can be neglected. With the volume of steam or water in the steam drum increasing, the fluctuation of the reactor temperature will increase;nevertheless, the decrease of the temperature difference for heat transfer will weaken the effect of the volume in steam drum.

关 键 词：F-T合成 反应器 汽包 数学模型 动态模拟 

分 类 号：TQ052.5[化学工程]