摘要
以湿法脱硫工艺为基础,将工业废弃物赤泥以及矿井废水联合制成脱硝吸收液。利用鼓泡反应装置,考察了不同因素及氧化剂对吸收液脱硝效率(DN)的影响。结果表明:温度超过50℃不利于氧化吸收的进行;在弱酸性或碱性条件下吸收液具有较高的反应活性;低浓度的SO_2对DN有促进作用,高浓度的SO_2对DN有抑制作用。反应条件优化后,吸收液的DN高达48%。此外,发现NaClO_2是较为理想的添加剂,可将吸收液的DN提高至70%。
In this study,new absorption liquid,based on wet flue gas desulphurization process,was made by combining red mud and mine wastewater to achieve the simultaneous desulfurization and denitration. The main factors and oxide absorbers＇ influence on denitration（ DN） efficiency,within the bubbling reactor was studied. The results showed that the temperature exceeding 50 ℃ was not beneficial for the denitration,and the activity of absorption liquid was comparatively higher under acidic or alkaline condition. Low concentration of SO_2 could promote denitration,while excessive SO_2 would lead to the inhibition effect. In optimal conditions,the denitration efficiency remained 48%. Besides,the results showed that NaClO_2 was an excellent oxidant and sorbent,by which the denitration efficiency could be up to 70%.
出处
《环境工程》
CAS
CSCD
北大核心
2017年第1期93-97,共5页
Environmental Engineering
基金
国家自然科学基金(41373100)
山东省科技惠民计划(2013kjhm060308)
关键词
烟气脱硝
赤泥
矿井废水
以废治废
flue gas denitration
red mud
mine wastewater
using waste to treat waste
