The CO₂Emission Control Based On IGCC System And Economic Evaluation Research

In recent years, the pressure of CO2emission reduction from the international and the energy crisis force people to seek for new technology for CO2emission reduction. China’s coal consumption is mainly for industry, and coal for power generation is up to54.7%of the total. While IGCC provides the convenience for CO2emission reduction in power plant. So study on IGCC system for CO2emission reduction, has important realistic meanings in this paper.In this paper, based on the process simulator——Aspen Plus simulator, the models of IGCC-Capture are established. Combined with the construction project financial evaluation method, economical evaluation criterions of the models such as total investment、than investment generation cos、emission reduction cost、total cost (average annual cost)、financial net present value、internal rate of return, are getted by technical economy evaluation. So IGCC and IGCC with CO2capture are not profitable is feasible in economy in the sxisting rules Material costs and fees standard.Single factor sensitivity analysis for IGCC-Capture system, and in view of the most sensitive factor in theoretically and power coal price variable in reality, by economic calculation, we can get the conclution that if it need profitable, the critical electricity price is RMB0.553per kWh or critical coal prices is RMB435per ton. And this electricity price can provide the basis for benchmarking electricity price of IGCC-Capture.Economic analysis of CO2capture after combustion in supercritical power plant, and Compared with the result getted by economic analysis on IGCC-Capture system, the results show that no matter whether or not emission reduction, its total investment and than investment of IGCC power plant are greater than the PC plant. however, for IGCC, after emission reduction, its reduction value of generation efficiency、generation cost、 emission reduction cost are all lower than PC power station.