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在热输入功率为50 kW的循环流化床富氧燃烧综合试验台上进行徐州烟煤和龙岩无烟煤在空气、21%O2/79%CO2、30%O2/70%CO2和40%O2/60%CO2气氛下的燃烧试验,考察气氛对温度、燃烧效率和污染物排放的影响。结果表明,2种煤在不同气氛下均燃烧稳定;沿炉膛高度方向,温度先升高后降低;随着氧化介质中O2浓度的增加,温度水平上升;随着氧化介质中O2浓度的提高,燃烧效率提高;空气气氛下燃烧效率介于21%O2/79%CO2和30%O2/70%CO2气氛之间;未添加脱硫剂时,随着氧化介质中O2浓度的提高,烟煤和无烟煤燃烧SO2排放浓度提高;21%O2/79%CO2气氛下,NO排放量比空气气氛下低;随着O2浓度的升高,NO排放量升高;21%O2/79%CO2气氛CO排放量比空气气氛下大很多,但随着O2浓度的升高,CO排放量迅速下降。
The tests were carried out on air, 21% O2 / 79% CO2, 30% O2 / 70% CO2 and 40% O2 / 60% at Xuzhou bituminous coal and Longyan anthracite on a circulating fluidized bed oxygen enriched combustion integrated test bench with a heat input of 50 kW The combustion test in CO2 atmosphere examines the effect of atmosphere on temperature, combustion efficiency and pollutant emissions. The results show that the combustion of two kinds of coal is stable under different atmosphere; the temperature increases first and then decreases along the height of the furnace; the temperature rises with the increase of the concentration of O2 in the oxidation medium; with the increase of O2 concentration in the oxidation medium, The combustion efficiency is improved; the combustion efficiency in air is between 21% O2 / 79% CO2 and 30% O2 / 70% CO2; when no desulfurizer is added, the bituminous coal and anthracite are burned with the increase of O2 concentration in the oxidizing medium SO2 emission concentration increased; under 21% O2 / 79% CO2 atmosphere, NO emission was lower than air atmosphere; with the increase of O2 concentration, NO emission increased; CO emission ratio of 21% O2 / 79% CO2 atmosphere The atmosphere is much larger, but as the O2 concentration increases, CO emissions drop rapidly.