尿素/O_3湿法废气脱硝技术的研究

WET FLUE GAS DENITRIFICATION USING UREA/O_3 SOLUTION TECHNOLOGY

以脱硫吸附剂生产装置产生的废气为原料,采用填料塔对尿素/O3湿法废气脱硝技术进行了实验研究,考察了废气流量、O3流量、O3氧化级数等因素对NOx脱除效果以及脱硝率的影响,并与已应用的超重力/吸收塔尿素湿法废气脱硝技术进行了对比。结果表明,尿素/O3湿法废气脱硝法的最佳处理条件为废气流量8.6m3/h、O3流量1.5m3/h、三级O3氧化处理,在该条件下废气脱硝率达到99.9%,处理过的废气中NOx浓度低于100mg/m3,其处理效果优于超重力/吸收塔尿素湿法废气脱硝技术,具有很好的工业应用价值。

The wet flue gas denitrification test was conducted for the exhaust gas from sorbent des- ulfurization unit using urea/O3 solution in a packed column. The effect of the experimental parameters of flue gas flow, ozone flow and the stages of ozone oxidation were investigated. The laboratory tests show that the optimum process conditions are 8.6 m3/h of flue gas, 1.5 m3/h of 03 and three stage ozone oxi- dation. At the above conditions, the removal ratio of NOx using urea/O3 solution technology can reached 99.9%, NOx content in wet flue gas is below 100 mg/m3. The results compared with that of urea solu- tion/absorption and supergravity technology indicate that the urea/O3 solution denitrification technology exhibits higher removal efficiency towards NOx in flue gas.