为实现固体废物的高效清洁利用，提出一种集成固体废物等离子气化处理、联合循环发电与污泥热解的新型系统。在该系统中，利用固体废物气化与污泥热解产生合成气，清洁后合成气被输送至燃烧室中燃烧产生高温烟气，并利用余热锅炉回收烟气余热；同时利用联合循环中部分高品位蒸汽为污泥热解提供热源，实现能量的梯级利用。以进料速率为1.00 kg/s的等离子气化炉与污泥热解反应器为研究对象，通过Aspen Plus和EBSILON软件进行仿真模拟，并对所提系统进行热力学和经济性分析。结果表明：该系统的净电功率为10.86 MW，其能量效率和?效率分别达到50.13%和53.66%，能量效率较常规固废气化技术提高约1.60%；蒸汽轮机为系统最主要的?损来源，约占系统总?损失的26.84%。在运行周期内，系统的净现值可达到32434.54万元，动态回收周期为5.39年。敏感性分析表明，系统在固体废物处理补贴价格降低不超过65.43%时，仍保持盈利。

In order to achieve efficient and clean utilization of solid waste, a novel system integrating solid waste plasma gasification, combined cycle power generation and sludge pyrolysis. In this system, solid waste gasification and sludge pyrolysis are used to generate syngas, and the cleaned syngas is transported to the combustion chamber to burn and produce high-temperature flue gas, and the waste heat recovery is implemented through a heat recovery steam generator; while high-grade steam from the combined cycle is cascaded to supply thermal energy for the pyrolysis process, enabling graded energy utilization. Focusing on plasma gasifiers and sludge pyrolysis reactors with a feed rate of 1.00 kg/s, simulation models were developed using Aspen Plus and EBSILON software for comprehensive thermodynamic and economic analyses. Results demonstrate that the system achieves a net power output of 10.86 MW, with energy and exergy efficiencies reaching 50.13% and 53.66% respectively, representing a 1.60% improvement in energy efficiency compared to conventional solid waste gasification technologies. The steam turbine constitutes the primary source of exergy destruction, accounting for 26.84% of total system losses. The net present value of the system can reach 324.35 million yuan during the operation cycle, and a dynamic payback period of 5.39 years. The sensitivity analysis shows that the system remains profitable when the subsidized price for solid waste disposal is reduced by no more than 65.43%.

TK221

中国电力工程顾问集团有限公司科技项目（DG2-J03-2023）; 国家自然科学基金面上项目(52276006)