污泥、皮革和煤的协同热处置
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摘要
研究污泥、皮革、煤以不同比例混合时的热解特性和混烧特性,结果表明:皮革的平均失重率最高,在500℃时失重可达70%,污泥失重率比较稳定;煤的挥发分析出特性最差,最大失重率对应的温度最高,而且物料混合时有一定的交互影响,能促进热解过程;混烧时皮革含量越高,燃烧越充分,炉内温度越高,而污泥越多,烟气中的NO_x含量越高,煤的掺入能降低烟气中二恶英的浓度。
This paper studied the co-pyrolysis and co-combustion characteristics of sewage sludge, leather scrapsand coal. The results showed that the leather scraps had the largest average weight loss rate, which reached 70%at 500 ℃. The weight loss rate of sewage sludge was relatively stable, while the devolatilization of coal was themost difficult and the temperature at the largest weight loss rate was the highest. Besides, the interactions be-tween the three materials promoted the pyrolyzing process. The results of co-combustion experiments indicatedthat leather scraps optimized the combustion condition and increased the combustion temperature. The content ofNOx in the flue gas increased when more sewage sludge was added. The adding of coal decreased the content ofdioxins in the flue gas.
This paper studied the co-pyrolysis and co-combustion characteristics of sewage sludge, leather scrapsand coal. The results showed that the leather scraps had the largest average weight loss rate, which reached 70%at 500 ℃. The weight loss rate of sewage sludge was relatively stable, while the devolatilization of coal was themost difficult and the temperature at the largest weight loss rate was the highest. Besides, the interactions be-tween the three materials promoted the pyrolyzing process. The results of co-combustion experiments indicatedthat leather scraps optimized the combustion condition and increased the combustion temperature. The content ofNOx in the flue gas increased when more sewage sludge was added. The adding of coal decreased the content ofdioxins in the flue gas.
引文
[1]王学魁,赵斌,张爱群,等.城市污水处理厂污泥处置的现状及研究进展[J].天津科技大学学报,2015,30(4):1-7
[2]裴晋,于晓华,姚宏,等.制药污泥处理技术研究现状与试验对比[J].环境工程学报,2015,9(8):4009-4014
[3]赵丹,张琳,郭亮,等.水热碳化与干法碳化对剩余污泥的处理比较[J].环境科学与技术,2015,38(10):78-83
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[5]朱蕾.废弃革制品皮革性能及资源化利用研究[D].西安:陕西科技大学,2013
[6]苏胜,李培生,孙学信,等.污泥基本特性及其与煤混烧的热重研究[J].热力发电,2004(9):69-71
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[10]常风民,王启宝,王凯军.城市污泥与煤混合热解特性及动力学分析[J].环境工程学报,2015,9(5):2412-2417
[11]SCOTT S A,DENNIS J S,DAVIDSON J F,et al.Thermogravimetric measurements of the kinetics of pyrolysis of dried sewage sludge[J].Fuel,2006,85(9):1248-1253
[12]DONG Kyun Seo,SANG Shin Park,et al.Study of coal pyrolysis by thermogravimetric analysis(TGA)and concentration measurements of the evolved species[J].Journal of Analytical and Applied Pyrolysis.2011,92(1):209-216
[13]常风民,王启宝,贾晋炜,等.城市污泥两段式催化热解制合成气研究[J].中国环境科学,2015,35(3):804-810
[14]薛新巧,唐文秀,李霞,等.福城煤的热解动力学研究[J].宁夏大学学报(自然科学版),2016,37(1):80-84
[15]杨肖曦,李晓宇,程刚,等.含油污泥与煤共热解特性的研究[J].西安石油大学学报:自然科学版,2012,27(5):82-85
[16]陈江,杨金福,蔡泓林,等.污泥的热解特性试验研究[J].浙江工业大学学报,2005,33(3):315-318
[17]矫维红,那永洁,郑明辉,等.城市下水污泥焚烧过程中二次污染物排放特性的试验研究[J].环境污染治理技术与设备,2006,7(4):74-77
[18]国家环境保护总局.HJ/T299-2007.固体废物浸出毒性浸出方法硫酸硝酸法[S].北京:中国环境科学出版社,2007
[19]国家环境保护总局.GB5085.3-2007.危险废物鉴别标准浸出毒性鉴别[S].北京:中国环境科学出版社,2007
[20]周建国,张曙光,李萍,等.城市生活垃圾焚烧飞灰中重金属的固化/稳定化处理[J].天津城建大学学报,2015,21(2):109-113
[2]裴晋,于晓华,姚宏,等.制药污泥处理技术研究现状与试验对比[J].环境工程学报,2015,9(8):4009-4014
[3]赵丹,张琳,郭亮,等.水热碳化与干法碳化对剩余污泥的处理比较[J].环境科学与技术,2015,38(10):78-83
[4]王艳.城市污泥及其与煤混烧的燃烧特性研究[D].长沙:长沙理工大学,2010
[5]朱蕾.废弃革制品皮革性能及资源化利用研究[D].西安:陕西科技大学,2013
[6]苏胜,李培生,孙学信,等.污泥基本特性及其与煤混烧的热重研究[J].热力发电,2004(9):69-71
[7]崔浩.污泥和烟煤混烧动力学特性及HCl排放和脱除试验研究[D].武汉:华中科技大学,2011
[8]YAN Jianhua,CHEN Tong,LI Xiaodong,et al.Evaluation of PCDD/Fs emission from fluidized bed incinerators co-firing MSW with coal in China[J].Journal of Hazardous Materials,2006,135(1/2/3):47-51
[9]VERHULST D,BUEKENS A,SPENCER P J,et al.Thermodynamic behavior of metal chlorides and sulfates under the conditions of incineration furnaces[J].Environmental Science&Technology.1996,30(1):50-56
[10]常风民,王启宝,王凯军.城市污泥与煤混合热解特性及动力学分析[J].环境工程学报,2015,9(5):2412-2417
[11]SCOTT S A,DENNIS J S,DAVIDSON J F,et al.Thermogravimetric measurements of the kinetics of pyrolysis of dried sewage sludge[J].Fuel,2006,85(9):1248-1253
[12]DONG Kyun Seo,SANG Shin Park,et al.Study of coal pyrolysis by thermogravimetric analysis(TGA)and concentration measurements of the evolved species[J].Journal of Analytical and Applied Pyrolysis.2011,92(1):209-216
[13]常风民,王启宝,贾晋炜,等.城市污泥两段式催化热解制合成气研究[J].中国环境科学,2015,35(3):804-810
[14]薛新巧,唐文秀,李霞,等.福城煤的热解动力学研究[J].宁夏大学学报(自然科学版),2016,37(1):80-84
[15]杨肖曦,李晓宇,程刚,等.含油污泥与煤共热解特性的研究[J].西安石油大学学报:自然科学版,2012,27(5):82-85
[16]陈江,杨金福,蔡泓林,等.污泥的热解特性试验研究[J].浙江工业大学学报,2005,33(3):315-318
[17]矫维红,那永洁,郑明辉,等.城市下水污泥焚烧过程中二次污染物排放特性的试验研究[J].环境污染治理技术与设备,2006,7(4):74-77
[18]国家环境保护总局.HJ/T299-2007.固体废物浸出毒性浸出方法硫酸硝酸法[S].北京:中国环境科学出版社,2007
[19]国家环境保护总局.GB5085.3-2007.危险废物鉴别标准浸出毒性鉴别[S].北京:中国环境科学出版社,2007
[20]周建国,张曙光,李萍,等.城市生活垃圾焚烧飞灰中重金属的固化/稳定化处理[J].天津城建大学学报,2015,21(2):109-113