Design and evaluation of a conceptual waste-to-energy approach integrating plasma waste gasification with coal-fired power generation

Peiyuan Pan, Weike Peng, Jiarui Li, Heng Chen, Gang Xu and Tong Liu

Energy, 2022, vol. 238, issue PC

Abstract: A hybrid design that combines waste gasification and coal-fired power generation has been proposed for improving the waste-to-energy process. In the integrated scheme, municipal solid waste is fed into the plasma gasifier and converted into syngas, which is precooled by the feedwater of the coal power plant and then conveyed directly into the coal-fired boiler for combustion. Consequently, the syngas energy is exploited for electricity production through the steam cycle of the coal power plant. The benefits of this concept were examined based on a 4.0 kg/s (waste feed rate) plasma gasifier and a 660 MW coal power plant in the thermodynamic and economic aspects. Once the net power generated from coal remains constant, 16.12 MW net power can be produced from waste with a net waste-to-electricity efficiency of 35.16% in the hybrid design. Only 4.58 years is required to recover the initial investment of the proposed waste-to-energy system, and a net present value of 40,341.00 k$ can be achieved in its 25-year lifetime. Besides, the effects of the waste moisture content, equivalence ratio, and gasification temperature on the performance of the hybrid system were discussed.

Keywords: Waste-to-energy; Plasma gasification; Coal-fired power plant; System integration; Performance evaluation (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:238:y:2022:i:pc:s0360544221021952

DOI: 10.1016/j.energy.2021.121947

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