污泥与生活垃圾协同焚烧处理设计工艺研究——以上海松江区污泥与生活垃圾协同焚烧处理工程为例
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摘要
针对上海松江区污水厂污泥经深度脱水后含水率(60%~80%)高于进入填埋场含水率要小于60%指标要求以及用地紧张等系列问题,利用松江生活垃圾焚烧厂二期渗沥液预留用地,将焚烧厂的余热作为干化热源,将污泥含水率降低为30%后进入焚烧厂与垃圾掺烧,污泥干化冷凝水进入焚烧厂内渗沥液处理站进行处理,污泥干化冷凝产生的不凝性气体输送至焚烧厂卸料坑,其余臭气及焚烧厂渗沥液处理系统产生的臭气统一收集处理,经协同化处理后,节省投资12 137万元,运行费用每吨节省约73元。
For a series of problems such as that the water content(60%~80%)of sewage sludge in Songjiang district of Shanghai was higher than that of landfill after deep dehydration which requested less than 60%,land shortage and so on. Take advantage of second phase leachate reserved land of domestic waste incineration plant in Songjiang,the waste heat of incineration plant was used as the heat source of drying. The water content of sludge which reduced to 30% was mixed with garbage in incineration plant,and then sludge drying condensate was treated at leachate treatment station in incineration plant. Afterwards,non-condensable gas produced by sludge desiccation and condensation was transported to the discharge pit of incineration plant.Finally,the rest of the odor and odor generated from leachate treatment system in incineration plant were collected and treated uniformly. After synergistic treatment,the investment was reduced by 121.37 million yuan R MB, and the operation cost was saved by about 73 yuan R MB per ton.
For a series of problems such as that the water content(60%~80%)of sewage sludge in Songjiang district of Shanghai was higher than that of landfill after deep dehydration which requested less than 60%,land shortage and so on. Take advantage of second phase leachate reserved land of domestic waste incineration plant in Songjiang,the waste heat of incineration plant was used as the heat source of drying. The water content of sludge which reduced to 30% was mixed with garbage in incineration plant,and then sludge drying condensate was treated at leachate treatment station in incineration plant. Afterwards,non-condensable gas produced by sludge desiccation and condensation was transported to the discharge pit of incineration plant.Finally,the rest of the odor and odor generated from leachate treatment system in incineration plant were collected and treated uniformly. After synergistic treatment,the investment was reduced by 121.37 million yuan R MB, and the operation cost was saved by about 73 yuan R MB per ton.
引文
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[6]Roy M M,Dutta A,Corscadden K,et al.Review of biosolids management options and co-incineration of a biosolid-derived fuel[J].Waste Manage,2011,31(11):2228-2235.
[7]Werther J,Ogada T.Sewage sludge combustion[J].Prog Energy Combus Sci,1999,25(1):55-116.
[8]Nadziakiewicz J,Koziol M.Co-combustion of sludge with coal[J].Appl Energy,2003,75(3):239-248.
[2]Moreira R,Sousa J P,Canhoto C.Biological testing of a digested sewage sludge and derived compost[J].Bioresour Technol,2008,99(17):8382-8389.
[3]Li B,Wang F,Yan J H,et al.Feasibility analysis on drying and incineration of sewage sludge from a wastewater treatment plant[J].Chinese J Environ Eng,2012,6(10):3399-3404.
[4]Kang J,Zhang Z Q,Shao M.Effects of the ratios of maize straw to sewage sludge on speciation of Cu and Zn during corn posting process[J].Chinese J Environ Eng,2011,5(2):436-442.
[5]Fullana A,Conesa J A,Font R,et al.Formation and destruction of chlorinated pollutants during sewage sludge incineration[J].Environ Sci Technol,2004,38(10):2953-2958.
[6]Roy M M,Dutta A,Corscadden K,et al.Review of biosolids management options and co-incineration of a biosolid-derived fuel[J].Waste Manage,2011,31(11):2228-2235.
[7]Werther J,Ogada T.Sewage sludge combustion[J].Prog Energy Combus Sci,1999,25(1):55-116.
[8]Nadziakiewicz J,Koziol M.Co-combustion of sludge with coal[J].Appl Energy,2003,75(3):239-248.