Investigation into the operation of an autothermal two-section subbituminous coal fluidized bed gasifier  

作　　者：Nikolay Abaimov Alexander Ryzhkov Alexey Dubinin Lu Ding Vladimir Tuponogov Sergey Alekseenko 

机构地区：[1]Ural Federal University,Ekaterinburg,Russia 6200022 [2]Institute of Clean Coal Technology,East China University of Science and Technology,Shanghai 200237,China [3]Institute of Thermophysics,Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia 630090

出　　处：《International Journal of Coal Science & Technology》2023年第3期190-203,共14页国际煤炭科学技术学报（英文）

基　　金：funding from the Ministry of Science and Higher Education of the Russian Federation (Ural Federal University Program of Development within the Priority-2030 Program)is gratefully acknowledged.

摘　　要：Using a newly developed experimental setup,the features and advantages of an autothermal single-casing atmospheric sub-bituminous coal fluidized bed air-blown gasifier,combining a combustion and gasification section,and mixing the dispersed phase(inert material,char)and heat exchange between them through an annular transfer device,have been revealed.To increase the efficiency of the gasifier,an experimental-computational method was developed find the conditions for optimal operation,combining changing the annular flow's geometry and regulating the primary air for gasification.A simple and reliable multizone thermodynamic calculation model makes it possible to predict the composition of char and syngas in the gasification section with acceptable accuracy.This method confirmed that a two-section fluidized bed gasifier can provide efficient gasification of solid fuels and is suitable for use in small-scale cogeneration plants.Syngas with a heating value of 3.6-4.5 MJ/m^(3)and CGE of 38.2%-42.3%was obtained in the experimental setup without optimizing the primary air flow rate.With optimization,the indicators increased to the heating value of syngas of 5.20-5.34 MJ/m^(3)and CGE of 42.5%-50.0%.With heat regeneration of 0.8,CGE increases to 70%.

关 键 词：COAL SYNGAS GASIFICATION Bubbling fluidized bed THERMODYNAMICS Modeling 

分 类 号：O64[理学—物理化学]