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Process analysis of a two-stage fluidized bed gasification system with and without pre-drying of high-water content coal
An P.a, Han Z., Wang K., Cheng J., Zhou J., Rizkiana J.c, Abudula A.a, Guan G.a, Bai D., Xu G.
a Graduate School of Science and Technology, Hirosaki University, Hirosaki, Japan
b Key Laboratory on Resources Chemicals and Materials of Ministry of Education, Shenyang University of Chemical Technology, Shenyang, China
c Department of Chemical Engineering, Institut Teknologi Bandung, Bandung, Indonesia
d State Key Laboratory of Multi-phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2020 Canadian Society for Chemical EngineeringIn order to investigate the gasification performance of coal with high water content, a two-stage fluidized bed gasification (TSFBG) system was systematically simulated by Aspen Plus to identify the effect of pre-drying for coal with its initial water content varying from 10-65 wt% on gasification performance, particularly energy efficiency. The results show that the energy efficiency based on lower heating value (LHV) (ηLHV) and higher heating value (HHV) (ηHHV) of feed coal are about 1.5%-7% and 1.5%-5% higher when coal is fed to the system directly without pre-drying. For the TSFBG system, the higher the water content, the greater the energy efficiency reduction by pre-drying. The analysis of energy allocations reveals that heat loss due to the pre-drying of coal is mainly responsible for the decrease of energy efficiency in operations with pre-drying. With an increase in the initial water content from 10 to 65 wt%, the ηLHV of the TSFBG system without the pre-drying of coal using air/steam as gasification agent reaches its maximum of about 91% at an initial water content of 26 wt%. The ηLHV and ηHHV of the TSFBG system using oxygen/steam as gasification agent increases energy efficiency by about 1%-2% compared to that using air/steam. For TSFBG using air/steam to gasify coal without the pre-drying, the preferred initial water content of coal is below 50 wt%.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]ASPEN PLUS,Energy allocations,Fluidized bed gasification,High water content,Higher heating value,Initial water contents,Lower heating value,Process analysis[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]energy efficiency,fluidized bed,pre-drying,process simulation,two-stage gasification[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][{‘$’: ‘This work was financially supported by the National Natural Science Foundation of China (No. U1908201), the National Key Research and Development Program of China (No. 2018YFE0103400), and High‐Level Innovation Team Overseas Training Project of Liaoning, China (No. 2018LNGXGJWPY‐ZD002).’}, {‘$’: ‘High‐Level Innovation Team Overseas Training Project of Liaoning, China, Grant/Award Number: 2018LNGXGJWPY‐ZD002; National Key Research and Development Program of China, Grant/Award Number: 2018YFE0103400; National Natural Science Foundation of China, Grant/Award Number: U1908201 Funding information’}][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1002/cjce.23879[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]