为了高效环保地处理和利用医疗废物,基于生物质电站,将医疗废物的等离子体汽化、燃料电池发电和碳捕集与封存耦合,实现了低碳排放。医疗废物经等离子体汽化后生成合成气,被清洁后首先应用于燃料电池,并在补燃后带动燃气轮机发电。高温烟气用于加热并过热生物质电站的部分给水。碳捕集单元由高温烟气和生物质发电机组的抽汽加热,同时回收了加压后二氧化碳的热能。基于2.00 kg/s的等离子汽化炉和34 MW的生物质发电站,对所提的设计进行了热力学和经济分析,以考察项目的性能。结果表明,医疗废物发电的能源和 GFDA3 效率可以达到9.62%和33.58%;同时,每年可以固定和封存10.86万t的二氧化碳;项目的投资只需5.06 a即可收回,净现值为72 566.21万元。

In order to treat and utilize medical wastes efficiently and environmentally friendly,low carbon dioxide emission is achieved by integrating plasma gasification of medical wastes,fuel cell power generation,and carbon capture and storage based on a biomass power plant.Medical wastes are gasified by plasma to generate syngas that is cleaned and then applied in fuel cell,which drives the gas turbine after supplemental combustion.High-temperature flue gas is utilized to heat and superheat part of the feed water of the biomass power plant.The carbon capture unit is heated by flue gas and extracted steam from the biomass power plant while recovering the thermal energy from the pressurized CO₂.To examine the project's performance,a thermodynamic and economic analysis is performed on the proposed design based on a 2.00 kg·s^-1 plasma gasifier and a 34 MW biomass power plant.The results show that the energy and exergy efficiencies of the medical wastes power generation project can reach 9.62% and 33.58%,respectively.Meanwhile,108 560 tons of CO₂ can be captured and stored annually.The DPP of the project is only 5.06 years with an NPV of RMB725.66 million.

卢荻(1997-),男,硕士生