捕获CO_2的部分煤气化氢电联产系统

Coal Partial Gasification-Based Polygeneration System of Hydrogen and Electricity With CO_2 Capture

基于煤炭分级转化、成分对口应用、污染物控制一体化等系统集成思路,提出了一种捕获CO_2的部分煤气化氢电联产系统。该系统利用增压流化床完成煤炭部分气化,降低了气化难度与气化炉造价,具有较好经济性;全面揭示了系统的热力和环境特性规律,指出气化炉碳转化率是影响系统热力性能的主要因素;系统具有良好的热力特性与环境特性,当CO_2的分离率为59.7%时,系统(火用)效率为54.3%。本文的研究为煤炭的清洁高效利用提供了可选择的途径。

A novel coal partial gasification-based polygeneration system of hydrogen and electricity with CO_2 capture is proposed through the integration of cascade conversion of coal,reasonable utilization according to component and CO_2 capture.The system realizes partial gasification of coal by the use of a pressurized fluidized bed to decrease gasification difficulty and cost of the gasifier,so it holds the better economic performance.And at the same time,the thermodynamic characteristics and environmental performance are revealed roundly.Results show that carbon conversion ratio of the gasifier is a dominant factor to affect performance of the system,and that the system has excellent thermodynamic and environmental performance.The exergy efficiency of the system can reach 54.3% when CO_2 separation ratio is 59.7%.The study provides optional pathway for clean and effective utilization of coal.