基于ASPEN PLUS平台的蔗渣与烟煤共气化

Co-gasification of bagasse and coal based on ASPEN PLUS platform

为了研究蔗渣与烟煤共气化对气化性能的影响,利用软件ASPEN PLUS对水蒸气为气化剂、蔗渣和烟煤为原料的共气化过程进行了模拟。通过改变C/B(烟煤与蔗渣)比例、S/F(水蒸气与燃料)比例、气化温度来研究合成气体积分数、气化效率、合成气低位热值的变化趋势,从而找到蔗渣与烟煤共气化的最佳工况。结果表明:随着蔗渣增加,低位热值逐渐降低,气化效率先升高后降低;随着气化温度升高,气化效率和低位热值均先升高后变得平缓;随着S/F的增加,气化效率先升高后降低,低位热值在S/F=0.6之后开始下降。提高气化温度、加入适量水蒸气均有利于共气化。当C/B比例为2:1,气化温度为850℃,S/F=0.6时,气化效率为88.05%达到最大,合成气低位热值为11407.34k J/m^3。

In order to study the effect of bagasse and bituminous coal co-gasification on gasification performance,co-gasification process of bagasse and bituminous coal using steam as gasifier and bagasse and bituminous coal as raw materials was simulated by using ASPEN PLUS.By changing the ratio of C/B(bituminous coal to bagasse)and the ratio of S/F(steam to fuel)and gasification temperature,the changing trends of the volume fraction of synthetic gas,gasification efficiency and low calorific value of syngas were studied,and the optimum condition of bagasse and bituminous coal co-gasification was found.The results show that with the increase of bagasse,the low calorific value decreased gradually,and the gasification efficiency increased first and then decreasedt;With the increase of gasification temperature,gasification efficiency and low calorific value increase first and then become flat;With the increase of S/F,the gasification efficiency increased first and then decreased,the low calorific value began to decrease after S/F=0.6.Increase of temperature and proper amount of water vapor are beneficial to co-gasification.When the ratio of C/B is 2:1,the gasification temperature is 850℃and S/F is 0.6.The gasification efficiency is 88.05%and the low caloric value of syngas is 11407.34 kJ/m3.