Carbon emission performance calculation and impact analysis of coal-fired power plants
To improve the accuracy and temporal resolution of carbon emission accounting for thermal power plants,Aspen Plus in conjunc-tion with mathematical models was used to account for carbon emission performance and analyze the effects of load,flue gas temperature,air distribution volume and coal composition on carbon emission performance.The results indicated that the carbon emission performance of a certain coal-fired power plant's 200 MW unit in fuel combustion was 674.02 g/kWh,while the performance based on calcium desulfu-rization was 3.10 g/kWh.Compared with the measured method,the deviation of carbon emissions calculated in this study was only 4.07％,validating the rationality of the accounting method.Regarding the analysis of factors affecting carbon emission performance,under 30％,50％,and 75％load of a 200 MW unit,carbon emission performances increased by 1.52％,3.86％,and 6.92％respectively compared to full load.The impact of flue gas temperature on carbon emission performance was relatively weak;increasing from 75 ℃ to 145 ℃ resulted in only a 0.02％increase in carbon emission performance.The carbon emission performance first increased and then decreased as the air distribution increased.The carbon emission performance at 5.00 × 105,6.80 × 105 and 8.00 × 105 kg/h was 682.74,673.48 and 679.20 g/kWh,respectively.In addition,the carbon emission performance of coal species with low carbon content and high low calorific value was relatively low,and the carbon emission performance of coal powder moisture increase was slightly improved.
carbon emission performancecoal-fired power plantAspen Plussimulationinfluencing factor
NETL
NSTL
万方数据
