兰炭化学链气化工艺系统自热运行参数分析及优化

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中图分类号：TQ546文献标志码：ADOI： 10.7652/xjtuxb202508015 文章编号：0253-987X（2025）08-0158-10

Analysis and Optimization of Autothermal Operation Parameters for Semi-Coke Chemical Looping Gasification System

GUAN Yu1，2 ，SONG Huchao 1，2 ，LIN Xiaolongl'²，WANG Bo1²，LIU Yinhe1，2 （1. State Key Laboratory of Multiphase Flow Enginering，Xi'an Jiaotong University，Xi'an 71o049，China; 2. School of Energy and Power Engineering，Xi'an Jiaotong University，Xi'an 71oo49，China）

Abstract： To achieve eficient and clean utilization of semi-coke，an autothermal chemical looping gasification system for syngas production from semi-coke is proposed. Based on the principle of Gibbs free energy minimization and the laws of energy and mass conservation， a chemical looping gasification model with a processing capacity of 2 000t⋅d-1 is established and validated with experimental data. The effects of key parameters， including gasifier temperature，air reactor temperature，and steam-to-carbon molar ratio，on system performance are investigated. The optimal autothermal operating conditions for the semi-coke chemical looping gasification system are determined and compared with conventional semi-coke gasification in terms of thermal efficiency. The results demonstrate that under a semi-coke feeding rate of 83. 33t⋅h-1 ，the optimal autothermal operating conditions are： steam flow rate of 108.99t⋅h-1 ，gasifier temperature of 900°C ，air reactor temperature of 1000∘C ，air flow rate of 247.25t⋅h-1 ，mass ratio of oxygen carrier （ CaSO4/Fe2O3 ）to semi-coke feed of 1.92，and mass ratio of heat carrier （Al2O3 ） to oxygen carrier of 16.29. Under these conditions，the system achieves a syngas mass flow rate of 80. 13t⋅h-1 with a production yield of 1700cm3⋅kg-1 . The overall thermal efficiency of the chemical looping gasification system reaches 83.81% ，significantly higher than the 80.51% efficiency of conventional semi-coke gasification，primarily due to the elimination of the air separation unit for oxygen production. This demonstrates notable performance advantages and development potential. The findings provide important references for industrial applications of semi-coke chemical looping gasification.

Keywords： semi-coke; chemical looping gasification; autothermal operation； syngas

兰炭（又称半焦）因其燃烧时产生蓝色火焰而得名，是以侏罗纪不粘煤和弱粘煤为原料，采用中低温干馏技术生产的一种煤化工产品。（剩余15781字）