EFFECTS OF SLUDGE BLENDING SINTERING ON MINERALIZATION, EMISSION OF FLUE GAS PARTICLES AND DIOXINS
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摘要: 针对我国污泥体量大、处置能力不足的问题,对石灰干化污泥掺入烧结的新型资源化方法进行了研究。系统研究了不同污泥掺入量对烧结成矿性能、烟气颗粒物及二噁英类物质排放的影响。研究表明:污泥掺入量<1.8%时,烧结成品率和转鼓指数小幅降低,固体燃耗变化不显著,总体对成矿质量影响较小;烧结排放的PM10和PM2.5颗粒物排放浓度随着污泥掺入量的增加,呈先降低后升高的趋势,配入烧结可显著降低细颗粒物中K、Na、Pb、Zn和Cu含量;在烧结过程中,二噁英类物质总质量浓度及总毒性当量浓度随着污泥掺入量的增加,呈先缓慢减小后急剧增加的趋势。该方法能大体量、低成本利用石灰干化污泥,具有良好的推广应用潜力。Abstract: Aiming at the problems of large sludge volume and insufficient disposal capacity in China, this paper systematically studied the new lime drying sludge resource utilization method of sludge blending sintering, and comprehensively studied the influence of different sludge blending amounts on sintering mineralization performance, flue gas particles and dioxins emissions. The research showed that when the amount of sludge was less than 1.8%, the yield and drum index decreased slightly, the change in solid fuel consumption was not significant, and the impact on the quality of mineralization was small; the concentration of PM10 and PM2.5 discharged from sintering decreased first and then increased, with the increase of sludge mixing amount. The method can significantly reduce the content of K, Na, Pb, Zn, and Cu elements in fine particles can be significantly reduced; the total mass concentration and total toxic equivalent concentration of dioxins decreased slowly and then increased sharply, with the increase of sludge volume. This method can use lime-dried sludge in large volume and at low cost, and have a good potential in real application.
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Key words:
- lime drying sludge /
- sinter /
- particulate matter /
- dioxins /
- mineralization performance
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[1] 李晓,朱火军,吴俊杰,等. 关于提高污泥脱水效果的前处理技术的研究进展[J]. 资源节约与环保,2021(5):83-85. [2] 戴晓虎,侯立安,章林伟,等. 我国城镇污泥安全处置与资源化研究[J]. 中国工程科学,2022(5):145-153. [3] 孙娟. 城市污水处理厂污泥中重金属污染治理方法研究进展[J]. 中国资源综合利用,2020,38(10):110-111,114. [4] 楚金喜,吕丹,贾清龙,等. 活性污泥重金属中毒的工艺调控方法与对策[J]. 净水技术,2022,41(1):166-171. [5] 劳昌玲,罗立强,沈亚婷,等. 微生物与重金属相互作用过程与机制研究进展[J]. 环境科学研究,2020,33(8):1929-1937. [6] 张玉秀,柴团耀. 废水生物处理过程中污泥的微生物种群结构和PAHs降解菌研究进展[J]. 中国科学院大学学报,2016,33(1):1-8. [7] 雒建伟,谈进,张安东. 城镇污水处理厂污泥处理处置现状浅议[J]. 山东工业技术,2017(23):3-4. [8] ZHU H, ZHANG L, WEN X, et al. Feasibility of applying forward osmosis to the simultaneous thickening, digestion, and direct dewatering of waste-activated sludge[J]. Bioresource Technology, 2012, 113(1): 207-213. [9] ROS M, ZUPANCIC G D. Two-stage thermophilic anaerobic-aerobic digestion of waste-activated sludge[J]. Environmental Engineering Science, 2004, 21(5):617-626. [10] 宋艳会,李兵,杨培君,等. 污水处理厂污泥减量化技术的探讨[J]. 当代化工,2020,49(11):2570-2573,2578. [11] 黄宏伟,罗冬梅,麦俊明,等. 污水处理污泥建材资源化利用现状[J]. 广东建材,2014,30(2):33-34. [12] 王可辉,蒋芬,王康. 关于城市污泥干化及焚烧处理工艺的分析与研究[J]. 污染防治技术,2021,34(3):5-10. [13] 王振江,黎青松,郭会超,等. 污泥石灰干化处理技术的关键影响因素研究[J]. 中国给水排水,2014,30(5):85-87. [14] 吕树梅. 常规污泥处理工艺对比及工程应用[J]. 净水技术,2019,38(增刊1):147-150. [15] 曹洲榕. 超声波耦合好氧堆肥预处理结合蚯蚓处理剩余污泥研究[D]. 成都:西南交通大学, 2017. [16] 徐晗,安平凡,宋广明.污泥综合处置及资源化利用技术研究[J]. 中国资源综合利用,2019,37(4):76-78. [17] 王海风,裴元东,张春霞,等. 中国钢铁工业烧结/球团工序绿色发展工程科技战略及对策[J]. 钢铁,2016,51(1):1-7. [18] 周宏仓,徐露,周云桥,等. 过量生石灰对污泥含水率和有机物含量的影响[J]. 环境工程学报,2013,7(2):717-721. [19] 常进,张新建,刘清才,等. 添加城市污泥对烧结过程及烧结矿质量的影响[J]. 钢铁研究学报,2017,29(9):711-716. [20] 邢奕,洪晨,张坤,等. 石灰干化污泥作为配料部分替代冶金烧结中熔剂和燃料[J]. 北京科技大学学报,2013,35(2):148-154. [21] 岳昌盛,彭犇,王晟,等. 除尘灰水洗对烟气颗粒物组成和二噁英的影响[J]. 工程科学学报,2018,40(10):1208-1214.
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