蘭炭化學(xué)鏈氣化工藝系統(tǒng)自熱運行參數(shù)分析及優(yōu)化

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中圖分類號：TQ546文獻標(biāo)志碼：ADOI： 10.7652/xjtuxb202508015 文章編號：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

蘭炭（又稱半焦）因其燃燒時產(chǎn)生藍色火焰而得名，是以侏羅紀(jì)不粘煤和弱粘煤為原料，采用中低溫干餾技術(shù)生產(chǎn)的一種煤化工產(chǎn)品。（剩余15781字）