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在一座热输入功率为90 kW的鼓泡流化床焚烧试验装置上进行油页岩干馏废水焚烧试验,考察床温、过剩空气系数、一二次风比和Ca/S比对排烟中NOx和SO2浓度的影响。结果表明:由于废水中氨氮含量较高,焚烧时随着床温的升高,NOx的排放浓度呈现先下降后上升的趋势,而非广泛接受的单调上升的规律,SO2的排放浓度呈上升趋势;随着过量空气系数的升高,NOx的排放浓度呈先下降后上升的趋势,SO2的排放浓度呈下降趋势;随着二次风率的升高,NOx的排放浓度呈下降趋势,SO2的排放浓度呈上升趋势;随着Ca/S比的升高,NOx的排放浓度先上升后下降,SO2的排放浓度逐渐下降。本次试验各工况下NOx的排放浓度范围为104.2～257.9 mg/m3;SO2的排放浓度范围为36.7～179.8 mg/m3,均满足国家排放标准。
In a bubbling fluidized bed incineration test device with a heat input of 90 kW, incineration experiments of oil shale distillation were carried out. The effects of bed temperature, excess air ratio, primary and secondary air ratio and Ca / S ratio on NOx And SO2 concentration. The results showed that the concentration of ammonia nitrogen in wastewater increased with the increase of bed temperature, and the concentration of NOx emission increased at first and then went up after incineration rather than the monotonically increasing law, SO2 emission concentration increased ; With the increase of excess air coefficient, the concentration of NOx emission first descends and then increases, and the emission concentration of SO2 descends. With the increase of secondary air rate, the concentration of NOx decreases, and the concentration of SO2 As the Ca / S ratio increases, the emission concentration of NOx first increases and then decreases, and the emission concentration of SO2 decreases gradually. In this test, the NOx emission concentration ranges from 104.2 to 257.9 mg / m3 for each operating condition and the emission concentration range for SO2 ranges from 36.7 to 179.8 mg / m3, all meeting the national emission standards.