生活垃圾焚烧厂烟气中二英的分布及净化特征
Distribution characteristics of PCDD/Fs in flue gas from municipal solid waste incineration plant
-
摘要: 以广州市某大型生活垃圾焚烧发电厂的3台焚烧炉(750 t·d-1)为对象,研究了焚烧烟气净化前后二英类同系物的分布特征及其污染控制效果.结果表明,采用"半干法脱酸+活性炭+布袋除尘"烟气净化工艺对二英的去除率能达到97.3%—99.4%.焚烧烟气中二英类同系物的分布特征表明,生活垃圾焚烧发电过程中二英主要在烟气换热过程合成.烟气净化过程中,活性炭喷射+布袋除尘净化系统对二英类同系物的去除效率存在一个优先级关系,即PCDDs>PCDFs且高氯代PCDFs>低氯代PCDFs.净化后的烟气中二英类同系物2,3,4,7,8-PeCDF的质量浓度与对应的二英当量浓度的相关性最高,相关系数R2为0.959,可以考虑将2,3,4,7,8-PeCDF作为二英的快速应急检测的指示物.Abstract: Based on the date from three incinerators (750 t·d-1) of a municipal solid waste incineration plant in Guangzhou, the distribution characteristics and pollution control effects of PCDD/Fs were investigated before and after incineration purification. The results revealed that the semi-dry deacidification + activated carbon + bag filter technology could effectively remove 97.3%-99.4% of dioxin in the flue gas. The distribution features of PCDD/Fs in the flue gas before purification indicated that dioxins were mainly synthesized in flue gas heat transfer process. The flue gas purification process possessed the following pattern of the removal efficiency of PCDD/Fs:PCDDs > PCDFs and high- chlorinated PCDFs > Low-chlorinated PCDFs. The mass concentrations of 2, 3, 4, 7 and 8-PeCDF in purified flue gas showed the highest coefficient of determination (R2=0.959) with dioxin-equivalent concentrations. Therefore, 2, 3, 4, 7 and 8-PeCDF appeared to be a rapid indicator of the emergency detection of dioxins.
-
Key words:
- municipal solid waste incineration /
- dioxin homologues /
- flue gas /
- emission
-
[1] 肖晓东. 生活垃圾焚烧厂烟气二英类的支持向量回归预测[D]. 武汉:华中科技大学,2017. XIAO X D.Prediction of dioxin emissions in flue gas from municipal solid waste incineration[D].Wuhan:Huazhong University of Science and Technology,2017(in Chinese). [2] 黄超, 陈凝, 杨明嘉, 等.二英类化合物的毒性作用机制及其生物检测方法[J]. 生态毒理学报, 2015, 10(3):50-62. HUANG C,CHEN N,YANG M J,et al.Review on the toxic mechanisms and bioassay approaches for dioxin-like compounds[J].Asian Journal of Ecotoxicology, 2015,10(3):50-62(in Chinese).
[3] FIEDLER H. National PCDD/PCDF release inventories under the Stockholm convention on persistent organic pollutants[J]. Chemosphere, 2007, 67(9):96-108. [4] 刘劲松, 刘维屏, 巩宏平, 等.城市生活垃圾焚烧炉周边环境空气及土壤中二英来源研究[J]. 环境科学学报, 2010, 30(10):1950-1956. LIU J S,LIU W P,GONG H P,et al.Source identification for PCDD/Fs in ambient air and soil in the vicinity of a municipal solid waste incinerator[J].Acta Scientiae Circumstantiae, 2010, 30(10):1950-1956(in Chinese).
[5] CHANG M B, LIN J J, CHANG S H. Characterization of dioxin emissions from two municipal solid waste incinerators in Taiwan[J]. Atmospheric Environment, 2002, 36(2):279-286. [6] LIN W Y, WU Y L, TU L K, et al. The emission and distribution of PCDD/Fs in municipal solid waste incinerators and coal-fired power plant[J].Aerosol & Air Quality Research, 2010, 10(6):519-532. [7] 杨志军, 倪余文, 张智平, 等.不同垃圾焚烧炉产生的PCDD/Fs和PCBs同类物的分布[J]. 环境化学, 2005, 24(1):63-67. YANG Z J,NI Y W,ZHANG Z P,et al.Patierrns of PCDD/Fs and PCBs congeners formed from diferent types of municipal waste incinerations[J].Environmental Chemistry, 2005, 24(1):63-67(in Chinese).
[8] LIAO J, BUEKENS A, OLIE K, et al. Iron and copper catalysis of PCDD/F formation[J]. Environmental Science & Pollution Research, 2016, 23(3):1-11. [9] ZENG X, REN J, PAN W, et al. Research on the formation and control measures of dioxin emissions from municipal solid waste incinerator[C]. International Conference on Electrical and Control Engineering. IEEE, 2011:1707-1710. [10] BUNSAN S, CHEN W Y, CHEN H W, et al. Modeling the dioxin emission of a municipal solid waste incinerator using neural networks[J]. Chemosphere, 2013, 92(3):258-264. [11] EVERAERT K, BAEYENS J, DEGREVE J. Entrained phase adsorption of PCDD/F from incinerator flue gases[J]. Environmental Science & Technology, 2003, 37(6):1219-1224. [12] [13] 柯钊跃, 韩娇.炉排式生活垃圾焚烧炉烟气中二英异构体组分特征[J]. 广东化工, 2017, 44(9):189-191. KE Z Y,HAN J.Isomer Compositional characteristics of PCDD/Fs in the flue gas from grate-type municipal solid waste incinerators[J].Guangdong Chemical Engineering, 2017, 44(9):189-191(in Chinese).
[14] SHI D Z, WU W X, LU S Y, et al. Effect of MSW source-classified collection on the emission of PCDDs/Fs and heavy metals from incineration in China[J]. Journal of Hazardous Materials, 2008, 153(1-2):685-694. [15] DICHSON L C, LENOIR D, HUTZINGER O. Quantitative comparison of de novo and precursor formation of polychlorinated dibenzo-p-dioxins under simulated municipal solid waste incinerator postcombustion conditions[J]. Environmental Science & Technology, 2002, 26(9):1822-1828. [16] 金宜英, 田洪海, 聂永丰.垃圾焚烧系统中二英类形成机理及影响因素[J]. 重庆环境科学, 2003, 25(4):14-16. JIN Y Y,TIAN H H,NIE Y F.Formation mechanism and influencing factors of dioxins in waste incineration system[J].Chongqing Environmental Science, 2003, 25(4):14-16(in Chinese).
[17] 邹川, 韩静磊, 杜兵, 等. 烧结过程中二英的排放浓度及同系物分布[C]. 持久性有机污染物论坛2011暨持久性有机污染物全国学术研讨会. ZHOU C,HAN J L DU B,et al.Dioxin emission concentration and homology distribution in sintering process[C].China Academic Journal Electronic Publishing House.2011(in Chinese). [18] 陈彤, 李晓东, 严建华, 等.垃圾焚烧炉飞灰中二英的分布特性[J]. 燃料化学学报, 2004, 32(1):59-64. CHEN T,LI X D,YAN J H,et al.Distribution characteristics of dioxins in fly ash of waste incinerator[J].Journal of Fuel Chemistry, 2004, 32(1):59-64(in Chinese).
[19] 陆胜勇. 垃圾和煤燃烧过程中二英的生成、排放和控制机理研究[D]. 杭州:浙江大学, 2004. LU S Y.Study on the Formation, emission and control mechanism of dioxins in the combustion of waste and coal[D].Hangzhou:Zhejiang University,2004(in Chinese). [20] [21] CHI K H, CHANG S H, HUANG C H, et al. Partitioning and removal of dioxin-like congeners in flue gases treated with activated carbon adsorption[J]. Chemosphere, 2006, 64(9):1489-1498. [22] 徐梦侠. 城市生活垃圾焚烧厂二英排放的环境影响研究[D]. 杭州:浙江大学, 2009. XU M X.Study on Environmental impact of dioxins emission from municipal solid waste incineration plant[D].Hangzhou:Zhejiang University,2009(in Chinese). [23] RORDORF B F. Prediction of vapor pressures, boiling points and enthalpies of fusion for twenty-nine halogenated dibenzo-p-dioxins and fifty-five dibenzofurans by a vapor pressure correlation method[J]. Chemosphere, 1989, 18(1-6):783-788. [24] CHI K H, CHANG M B. Evaluation of PCDD/F congener partition in vapor/solid phases of waste incinerator flue gases[J]. Environmental Science & Technology, 2005, 39(20):8023-8031. [25] 赵英孜, 蒋友胜, 张建清, 等.深圳市废弃物焚烧炉飞灰中二英含量水平和特征分析[J]. 环境科学学报, 2015, 35(9):2739-2744. ZHAN Y Z,JIANG Y S,ZHANG J Q,et al.Levels and characteristic analysis of dioxins in fly ash from waste incinerators of Shenzhen[J].Acta Scientiae Circumstantiae, 2015, 35(9):2739-2744(in Chinese).
[26] 林斌斌, 李晓东, 王天娇, 等.生活垃圾焚烧炉中二英、氯苯排放特性及关联[J]. 环境化学, 2018,37(3):428-436. LIN B B,LI X D,WANG T J,et al.Emission characteristics and correlation between PCDD/Fs and chlorobenzzens in the municipal solid waste incierators[J].Environmental Chemistry, 2018(3):428-436(in Chinese).
计量
- 文章访问数: 1429
- HTML全文浏览数: 1429
- PDF下载数: 51
- 施引文献: 0