焦炉煤气制备LNG反应器内部流场数值模拟研究

Numerical Simulation of Internal Flow Field in a Reactor for Preparing LNG from Coke Oven Gas

为了解决反应器内部催化剂受到较高温度从而失活的问题,本文利用模拟软件Fluent对反应器内部速度场及温度场分布情况进行分析,同时给出了模型的建立过程,通过数值模拟分析,发现反应器C与反应器B的入口速度较为类似,且反应器C内部的速度梯度更为明显,在靠近反应器C的壁面位置速度大于中部速度。同时对反应器内部温度场进行分析,发现反应器C与反应器B在入口位置温度相似,温度梯度变化更明显,但由于混合充分,并未出现局部高温问题,所以反应器C结构较为合理,为焦炉煤气制备LNG提供一定的参考。

In order to solve the problem that the catalyst in the reactor is inactivated due to high temperature,this paper analyzes the velocity field and temperature field distribution in the reactor using the simulation software FLUENT,and gives the process of establishing the model.Through the numerical simulation analysis,it is found that the inlet velocities of reactor C and reactor B are relatively similar,and the velocity gradient in reactor C is more obvious.The velocity near the wall surface of the reactor C is higher than the middle velocity.At the same time,the internal temperature field of the reactor is analyzed,and it is found that the temperature of reactor C and reactor B at the inlet is similar,and the temperature gradient changes more obviously.However,due to the full mixing,there is no local high temperature problem,so the structure of reactor C is reasonable,which provides a certain reference for the preparation of LNG from coke oven gas.