Jibei Electric Power Research Institute,State Grid Jibei Electric Power Co.,Ltd.
Department of Environmental Science and Engineering,North China Electric Power University (Baoding)

为提高火电碳排放核算准确性和时间分辨率,采用AspenPlus结合数学模型对碳排放绩效核算,并分析机组负荷、排烟温度、配风量、煤质成分对碳排放绩效的影响。结果表明,某燃煤电厂200MW机组燃料燃烧碳排放绩效为674.02g/kWh,钙法脱硫碳排放绩效为3.10g/kWh。对比实测法,核算偏差仅为4.07%,验证了核算方法的合理性。在碳排放绩效影响因素分析方面,100%THA、75%THA、50%THA、30%THA两两之间上升幅度依次为1.52%、3.86%和6.92%。排烟温度对于碳排放绩效影响相对较弱,温度由75℃升至145℃,碳排放绩效仅增长0.02%;随着配风量增加,碳排放绩效先上升后下降,5.00×105、6.80×105、8.00×105kg/h下碳排放绩效分别为682.74、673.48、679.20g/kWh;此外,含碳量低、低位热值较高的煤种碳排放绩效相对较低,煤粉水分增加碳排放绩效略微提升。

To improve the accuracy and temporal resolution of carbon emission accounting for thermal power plants,Aspen Plus in conjunction 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 ofa certain coal-fired power plant′s 200 MW unit in fuel combustion was 674.02 g/ kWh,while the performance based on calcium desulfurization 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 tofull load. The impact of flue gas temperature on carbon emission performance was relatively weak; increasing from 75 ℃ to 145 ℃ resultedin only a 0.02% increase in carbon emission performance. The carbon emission performance first increased and then decreased as the airdistribution increased. The carbon emission performance at 5. 00 × 10, 6. 80 × 10 and 8. 00 × 10 kg/ h was 682. 74, 673. 48 and679.20 g/ kWh,respectively. In addition,the carbon emission performance of coal species with low carbon content and high low calorificvalue was relatively low,and the carbon emission performance of coal powder moisture increase was slightly improved.

国家电网有限公司总部科技资助项目(1400-202214404A-2-0-ZN)

李朋,周卫青,白孝轩,等.燃煤电厂碳排放绩效核算及影响分析[J].洁净煤技术,2024,30(8):66-74.

LI Peng,ZHOU Weiqing,BAI Xiaoxuan,et al.Carbon emission performance calculation and impact analysis of coal-firedpower plants[J].Clean Coal Technology,2024,30(8):66-74.