CAJ | 학술논문

在IGCC电站中，空气分离系统(空分系统)的能耗最高。如果能降低空分系统的能耗，将显著提高IGCC电站的供电效率。该文依托某IGCC示范电站，对IGCC电站独立空分系统空气压缩单元的2种驱动方式进行了分析比较，认为相比于电动机驱动方式，小型汽轮机驱动空气压缩单元的方式不仅有利于电站的启动，而且能使电站的供电效率提高0.47%，在低负荷工况下运行，提高的幅度会更加显著。为进一步提升电站经济效益，通过改造IGCC电站的余热锅炉，增加补燃装置，使其可以在空分系统启动时为小型汽轮机提供启动蒸汽，从而大大降低电站的初期投资。
재IGCC전참중，공기분리계통(공분계통)적능모최고。여과능강저공분계통적능모，장현저제고IGCC전참적공전효솔。해문의탁모IGCC시범전참，대IGCC전참독립공분계통공기압축단원적2충구동방식진행료분석비교，인위상비우전동궤구동방식，소형기륜궤구동공기압축단원적방식불부유리우전참적계동，이차능사전참적공전효솔제고0.47%，재저부하공황하운행，제고적폭도회경가현저。위진일보제승전참경제효익，통과개조IGCC전참적여열과로，증가보연장치，사기가이재공분계통계동시위소형기륜궤제공계동증기，종이대대강저전참적초기투자。
ABSTRACT:The energy consumption of the air separation unit (ASU) in the integrated gasification combined cycle (IGCC) plant dominates the overall auxiliary power usage. Reducing the energy consumption of the ASU will greatly reduce the power consumption rate of the IGCC plant thus dramatically increasing the IGCC efficiency. Using a commercialized IGCC demonstration power plant as an example, a comprehensively comparative analysis was conducted for an isolated air separation unit. The results show that using a small steam turbine as the driving force for the air compressor unit of ASU has clear advantage over electric motor, since it is not only convenient for start-up but also more efficient in power generation. It may increase the power output efficiency by 0.47%. When operated at a lower load, the efficiency increase will be even higher. If the technology of supplementary fired heat recovery boiler is used in the heat recovery steam generator (HRSG) to provide the necessary steam for the ASU steam turbine during start-up, the initial investment will be reduced.