旋转填料床——氢氧化钠法治理火炸药行业氮氧化物尾气的研究

Research on Treatment of Nitrogen Oxides in Explosive Industry by Rotating Packed Bed with NaOH Solution

针对火炸药行业高浓度氮氧化物治理困难的情况,采用旋转填料床吸收治理,利用其优良特性,达到增加吸收剂的利用效率、降低治理成本和治理后尾气达标排放的目的。以NaOH溶液为吸收剂,考察了进气量、液气比、超重力因子、碱液浓度等对吸收率的影响。试验结果表明,在进气量2m3·h-1、液气比20L·m-3和超重力因子90的条件下,吸收率可达81.8%,在两台旋转填料床之间加入氧化装置,采用串连吸收后,吸收率可达95.4%。

In view of the difficulty in treating high concentration nitrogen oxides in explosive industry, a new absorption equipment - rotating packed bed was applied to increase the efficiency of the absorbent treatment of nitrogen oxides, reduce the costs of treatment and reach the discharging standards. NaOH solution was used as absorbent; the effect of gas flow, liquid gas ratio, high gravity factors and the concentration of NaOH solution on absorptivity were investigated. The results show that the absorption efficiency of single stage can amount to 81.8% at a gas flow rate of 2 m^3·h^-1 , liquid gas ratio of 20 L·m^-3 and high gravity factors of 90. Absorption efficiency of double stages with oxidation equipment can amount to 95.4%.