用旋转填料床治理火炸药厂的氮氧化物尾气

为解决火炸药行业高浓度氮氧化物尾气治理困难的现状,采用新型吸收设备——旋转填料床进行治理,利用旋转填料床的优良特性,达到提高吸收剂的利用效率、降低治理成本和治理后尾气达标排放的目的.在初期试验中,以清水为吸收剂,研究了进气量、液气比、超重力因子等操作参数对吸收率的影响,得出了最佳操作参数范围.采用吸收剂强化吸收,并对吸收机理进行了初步探讨.试验结果表明,在进气量2 m3/h、液气比20 L/m3和超重力因子为90的条件下,吸收率达到85.3%,采用两级串联吸收后,氮氧化物尾气达到了国家排放标准.试验证明旋转填料床用于治理火炸药行业氮氧化物尾气的可行性,具有良好的工业应用前景.

Treatment of Nitrogen Oxides in Explosive Industry by Rotating Packed Bed

To solve the view of the difficulty in treating high concentration nitrogen oxides in explosive industry, a new absorption equipment ,rotating packed bed, is applied. Due to its advanced characteristics, the rotating packed bed can be used to increase the efficiency of the absorbent treatment of nitrogen oxides, reduce the costs of treatment and reach the state discharging standards. When pure water was used as absorbent in initial experiment, the effects of gas flow, liquid gas ratio and high gravity factors on absorptivity were investigated and the best operation parameters were determined. In this experiment, absorbent was used for intensification of mass transfer and absorption mechanism was briefly discussed. The result indicates that absorptivity could amount to 85.3% at a gas flow rate of 2m^3/h, liquid gas ratio of 20L/m^3and high gravity factor of 90. After double stage treatment, the nitrogen oxides tail gas reached the state discharging standards. The rotating packed bed has wide industrial prospect for its advantages of smaller occupation of land, lower cost investment, easier operation and higher absorption efficiency.