鼓泡淤浆床甲醇合成(Ⅱ)工业装置的工程分析

METHANOL SYNTHESIS IN BUBBLE COLUMN SLURRY REACTOR (Ⅱ) ENGINEERING ANALYSIS OF INDUSTRIAL UNIT

利用经热模试验验证的鼓泡淤浆床甲醇合成的数学模型 ,讨论了不同参数 ,如表观气速、反应器直径、床层高度等对床层颗粒轴向分布的影响规律 ,确定了万吨级三相床甲醇合成工业示范装置的主要结构参数和操作参数范围 .对两种不同工业原料气分别进行了模拟计算 .模拟结果表明 ,在三相床甲醇合成过程中 ,压力的影响最为显著 ,反应器内床层高度亦是较为重要的可调节参数 .在本文的操作条件下 ,当甲醇产量达到 1× 10 4t·a-1时 ,在较广的温度和压力范围内 ,对两种原料气 ,出口甲醇摩尔分数在 7%～ 10 % ,CO转化率为 40 %～5 0 %

The relationships of particle axial distribution in the bubble column slurry reactor for the synthesis of methanol with various parameters, such as superficial gas velocity, reactor diameter and catalyst concentration, were discussed by means of a mathematical model verified by model test.The influence of the main construction parameters of the reactor and the operating parameters of industrial demonstration unit of 10000?t·a -1 were determined.The modeling results obtained under the conditions of two industrial synthesis gases showed that the influence of pressure in three-phase methanol synthesis process was most obvious, and slurry bed height was also a more important adjustable parameter.Under the operating condition in this paper, as methanol yield reaches 10000 tons per year, outlet methanol mole fractions is in the range from 0.07 to 0.10 and CO conversion is in the range from 40% to 50% within wider ranges of pressure and temperature with recycle and once-through of synthesis gases.