低温下改性活性炭对铅锌冶炼烟气中氮氧化物的吸附性能研究  

Study on the Adsorption Performance of Modified Activated Carbon for Nitrogen Oxides in Lead-Zinc Smelting Flue Gas at Low Temperature

作　　者：卢笛 卢柳洁 LU Di;LU Liu-jie(Henan Yuguang Gold Lead Group Co.,Ltd.;Beijing State-owned Capital Operation and Management Company Limited)

机构地区：[1]河南豫光金铅集团有限责任公司 [2]北京国有资本运营管理有限公司

出　　处：《化工机械》2024年第4期519-523,共5页Chemical Engineering & Machinery

基　　金：国家重点研发计划(批准号:2017YFC0210501)资助的课题。

摘　　要：针对传统技术在低温条件下烟气脱硝率低、活性炭吸附速率小等问题,结合温度条件改进研究了一种适用于低温条件的改性活性炭。分析铅锌冶炼排放烟气中的氮氧化物性质,利用氨气催化分离烟气中的NOx,通过扩孔和活化剂进行结构表征改性,增加活性炭比表面积,刺激活性炭吸附能力,以适应低温条件环境。利用Langmuir模型与Freundilch理论,计算活性炭吸附容量与温度、自由度的平衡关系,提高NO_x吸附数据监测与计算的精准度。实验结果表明,加入碳酸钾与羟基铁改进后的活性炭对NOx的脱硝率达到70%~100%,吸附速率最快可达0.7 mg/min。Considering traditional technologies-based low flue gas denitrification rate and small adsorption rate of activated carbon under low temperature conditions,a modified activated carbon suitable for low temperature conditions was studied by improving the temperature conditions.Through analyzing the properties of nitrogen oxides in the flue gas discharged from lead zinc smelting,making use of ammonia gas catalyze the separation of NOx in the flue gas and modify the structure through pore expansion and activator to increase the specific surface area and adsorption capacity of activated carbon,oxidize the oxygen-containing functional groups on the surface of modified activated carbon,stimulate its adsorption capacity to adapt to low-temperature conditions were implemented,including making use of the Langmuir model and the Freundilch theory analyze the equilibrium relationship between the activated carbon adsorption capacity and the temperature and calculate the degree of freedom to improve the accuracy of NOx adsorption data monitoring and calculation.The experimental results show that,the NOx denitration rate of activated carbon improved by adding potassium carbonate and iron hydroxyl can reach 70%to 100%,and the adsorption rate can be up to 0.7 mg/min.

关 键 词：改性活性炭 氮氧化物 烟气脱硝率 吸附速率 低温环境 

分 类 号：TQ050.42[化学工程]