摘要
为掌握小型园林垃圾焚烧炉产生烟气中PCDD/Fs的排放特征,探讨不同烟气处理设施对烟气中PCDD/Fs的脱除效率的影响,多次采集了经湿法脱硫、耐高温滤布和活性炭吸附柱等不同烟气处理设施处理后的烟气,分析其中PCDD/Fs.结果表明:小型园林垃圾焚烧炉烟气中PCDD/Fs以2,3,4,7,8-PeCDF毒性当量贡献率最大,PCDD/Fs总体排放特征与垃圾焚烧排放特征类似;当仅用湿法脱硫设施时烟气中PCDD/Fs平均毒性当量浓度为4.89ng I-TEQ/Nm3,增加高温滤布后PCDD/Fs平均浓度降至0.961ng I-TEQ/Nm3,而在此基础上加入活性炭吸附柱后,小型垃圾焚烧炉排放烟气中PCDD/Fs平均浓度仅为0.0839ng I-TEQ/Nm3.增加高温滤布和活性炭吸附柱装置后烟气中PCDD/Fs浓度降低了91.2%.因此联合使用高温滤布除尘和活性碳吸附设施能够有效的脱除PCDD/Fs,使得PCDD/Fs排放浓度达到国内最新标准限值及欧盟标准要求.
Characterization of PCDD/Fs emission from small-scale garden waste incinerator(SGWI) was studied, and the removal efficiencies of PCDD/Fs by air pollution control devices(APCDs) such as bag filter(BF) and activated carbon adsorption column(AC) were investigated. It was found that 2,3,4,7,8-PeCDF was the most abundant congener for PCDD/Fs congeners profiles, and emission feature of PCDD/Fs was similar with municipal solid waste incineration. The average concentration of PCDD/Fs in stack gas from SGMI with wet flue gas desulfurization equipment was 4.89ng I-TEQ/Nm3. It declined to 0.961ng I-TEQ/Nm3 after equipped with bag filter, and reduced to 0.0839ng I-TEQ/Nm3when AC was added as APCDs. Concentrations of PCDD/Fs in flue gas reduced by 91.24% by equipped with BF and AC. So PCDD/Fs in stack gas were effectively removed by using BF and AC jointly to meet the newest standard limit for pollution control on municipal solid waste incinerators in China and the EC emission standard limit of 0.1ng I-TEQ/m3.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2013年第S1期74-78,共5页
China Environmental Science
基金
环保公益性行业科研专项(201109001)
