CAJ | 학술논문

为了降低燃烧前CO2捕集对IGCC蒸汽动力系统出力的不利影响，并保证CO2捕集系统的稳定运行，CO2捕集消耗的蒸汽需要合理的从IGCC系统内部抽取。采用仿真模拟软件，研究了CO2捕集对IGCC系统中燃气轮机、余热锅炉和汽轮机负荷的影响。提出了两种水–气变换反应加湿蒸汽抽汽方案，通过对比这两种加湿蒸汽抽汽方案对汽轮机出力的影响，确定了最优的向 CO2捕集系统供汽策略。其中，水-气变换反应加湿蒸汽从气化炉汽包抽取，CO2分离过程消耗的低压加热蒸汽将根据负荷情况由余热锅炉低压蒸汽系统或汽轮机低压缸抽取。
위료강저연소전CO2포집대IGCC증기동력계통출력적불리영향，병보증CO2포집계통적은정운행，CO2포집소모적증기수요합리적종IGCC계통내부추취。채용방진모의연건，연구료CO2포집대IGCC계통중연기륜궤、여열과로화기륜궤부하적영향。제출료량충수–기변환반응가습증기추기방안，통과대비저량충가습증기추기방안대기륜궤출력적영향，학정료최우적향 CO2포집계통공기책략。기중，수-기변환반응가습증기종기화로기포추취，CO2분리과정소모적저압가열증기장근거부하정황유여열과로저압증기계통혹기륜궤저압항추취。
To reduce the negative influence of pre-combustion CO2 capturing on the IGCC steam turbine performance and to maintain the stability of CO2 capture system operation, the steam consumed by CO2 capturing needs to be properly extracted from integrated gasification combined cycle (IGCC) system. Through process simulation, the effects of CO2 capture on the load of gas turbine, heat recovery steam generator, and steam turbine in the IGCC system are studied. Two methods of steam extraction for water-gas shift reaction humidification are proposed and the better one is recommended by comparing the effect of these two approaches on the steam turbine load. It was shown that the humidification steam for water-gas shift reaction should be extracted from gasifier steam drum, and the low pressure heating steam consumed by CO2 separation process should be extracted from the low pressure steam system of heat recovery steam generator or from the low pressure cylinder of the steam turbine depending on the load conditions.