Abstract An advanced waste-to-energy system integrated with a coal-fired power plant has been proposed to improve the energy utilization of municipal solid waste. In the new design, the energy gained from the waste-to-energy boiler is employed to heat the feedwater and partial cold reheat steam of the coal power plant, and the feedwater of the waste-to-energy boiler is provided by the heat regeneration system of the coal power plant. Consequently, the energy obtained from the waste incineration products is injected into the steam cycle of the coal power plant, and the waste-to-electricity efficiency can be significantly boosted. Based on a 500 t/day waste-to-energy plant and a 630 MW coal power plant, the proposed hybrid scheme was evaluated compared with the conventional separate one. The results show that the waste-to-electricity efficiency is promoted by 9.16% points with an additional net power output of 3.71 MW, attributed to the suggested integration. Furthermore, the energy-saving mechanism of the novel concept was revealed by energy and exergy analyses. Finally, the new design was economically examined, which indicates that the dynamic payback period of the proposed waste-to-energy plant is only 3.55 years, which is 5.87 years shorter than that of the conventional one.

中文翻译：

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与燃煤电厂集成的创新垃圾发电系统

摘要 为了提高城市生活垃圾的能源利用率，提出了一种与燃煤电厂相结合的先进垃圾发电系统。新设计中，利用垃圾发电锅炉获得的能量加热燃煤电厂的给水和部分冷再热蒸汽，垃圾发电锅炉的给水由热再生提供。燃煤电厂系统。因此，从垃圾焚烧产品中获得的能量被注入到燃煤电厂的蒸汽循环中，可以显着提高垃圾发电效率。基于一个 500 吨/天的垃圾焚烧发电厂和一个 630 兆瓦的燃煤电厂，将提议的混合方案与传统的单独方案进行了比较。结果表明，由于建议的整合，垃圾发电效率提高了 9.16%，额外的净功率输出为 3.71 MW。此外，通过能量和火用分析揭示了新概念的节能机制。最后，对新设计进行了经济审查，表明拟建垃圾发电厂的动态投资回收期仅为 3.55 年，比传统设计缩短了 5.87 年。