市政污泥流化床焚烧试验研究
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摘要
城市污水污泥的产量随着城市化的发展和城市污水处理行业的兴起而急剧增加,如何处理日益增长的污水污泥以及尽量消除其所产生的危害是人类面临的一个重要的挑战,污泥处置的最终目标是实现减容化、稳定化和资源化。污泥流化床焚烧法正式顺应这种趋势而发展起来的一种有前途的污泥热化学处理方法,但是污泥高水分、低热值的特性影响了污泥焚烧的可行性和经济性。为了更好的推广污泥焚烧技术,我们考虑将污泥进行先干化再焚烧,因此对经污泥干化装置干化后的半干化污泥在循环流化床内的燃烧特性及污染物排放特性进行研究就显得非常必要。
本文首先介绍了污泥来源、危害、主要的处理处置方法以及我国的处理处置现状,并对污泥流化床焚烧技术国内外的研究现状进行了综述。在此基础上确定了本文的研究内容。
本文对试验用半干化污泥的成分、热解和燃烧特性、重金属元素含量及灰熔点等基本特性进行了研究,计算了污泥的燃尽指数和综合燃烧特性指数,采用Coasts指数积分法求解了污泥热解和燃烧动力学特性参数。研究结果为市政污泥的资源化利用和污泥焚烧装置运行工况的调整积累了基础实验数据。
本文在小型热态循环流化床燃烧装置上研究了不同工况下半干化试验污泥的燃烧特性,测试了焚烧过程中产生的烟气二次污染物的排放,通过对不同工况半干化试验污泥在流化床焚烧炉内的试验研究,了解和掌握了流化床炉焚烧半干化污泥的运行和污染物排放特性。
本文搭建了大型循环流化床污泥焚烧热态试验装置,并详细介绍了该试验装置的结构和系统。通过试验发现:该试验台装置符合设计要求。
在对半干化污泥燃烧机理研究的基础上,完成了300t/d污泥循环流化床焚烧炉的设计和校核计算,给出了该焚烧炉的总体结构图。
通过本文对半干化污泥在流化床内的燃烧特性以及污染物排放特性的试验研究,为半干化污泥流化床焚烧技术的发展建立了一定的实践基础,也为今后的深入研究提供了有价值的参考数据。
Urbanization development and sewage industry development have brought about a soaring increment of sewage sludge, how to dispose the ever-increasing sewage sludge and eliminate their hazard has become a serious problem with which people are currently confronted. The final objective of sewage sludge is to meet the requirements of decrement, stabilization and resources recycle. To conform to the new trend, incineration has become a promising disposal method. Whereas, sewage sludge is high moisture and low caloric fuel, which weakness the feasibility and economics of incineration. In order to spreads the application of these new technologies, the combustion of semi-dried sewage sludge is being considered. So it’s necessary to study the combustion and the main pollutants emission characteristics of semi-dried sewage sludge collected from a sludge drying apparatus in CFB.
At first, we introduced the classification and harm and source of sewage sludge, the methods of disposal about sewage sludge and sewage sludge disposal present situation of our country summarized the research results about fluidized bed sewage sludge burn. On this foundation, we determined this paper content.
We studied the basic characteristics of semi-dried sewage sludge including the component, the pyrolysis and combustion characteristics, the heavy mental content and ash melting point of the semi-dried sewage sludge. Burnout index and general combustion parameter of sludge were calculated, and combustion kinetic parameters were obtained by the Coasts method. The experimental results provide basic data for the energy application of sewage sludge and the adjustment of sludge incineration devices.
We studied the combustion characteristics of semi-dried sewage sludge in CFB incinerator, and tested the emission of second contaminant in the incineration process. Through combustion of semi-dried in CFB incinerator, we understand and grasp the operation and emission characteristics of semi-dried sewage sludge incineration in the CFB incinetator.
We build a large CFB incinerator. This paper introduced the system and structure of this test facility in detail. The experiment discoveries explain that the test facility accords with the design requirement.
On the basis of study of combustion mechanism of semi-dried sewage sludge, the overall thermodynamics design and verify calculation of the 300t/d sewage sludge circulating fluidized bed incinerator is carried out and the general drawing of incinerator is given.
The conclusions from above experiment are helpful to the development of combustion disposal methods of semi-dried sewage sludge and supply valuable reference datas for more research about semi-dried sewage sludge combustion in CFB.
本文首先介绍了污泥来源、危害、主要的处理处置方法以及我国的处理处置现状,并对污泥流化床焚烧技术国内外的研究现状进行了综述。在此基础上确定了本文的研究内容。
本文对试验用半干化污泥的成分、热解和燃烧特性、重金属元素含量及灰熔点等基本特性进行了研究,计算了污泥的燃尽指数和综合燃烧特性指数,采用Coasts指数积分法求解了污泥热解和燃烧动力学特性参数。研究结果为市政污泥的资源化利用和污泥焚烧装置运行工况的调整积累了基础实验数据。
本文在小型热态循环流化床燃烧装置上研究了不同工况下半干化试验污泥的燃烧特性,测试了焚烧过程中产生的烟气二次污染物的排放,通过对不同工况半干化试验污泥在流化床焚烧炉内的试验研究,了解和掌握了流化床炉焚烧半干化污泥的运行和污染物排放特性。
本文搭建了大型循环流化床污泥焚烧热态试验装置,并详细介绍了该试验装置的结构和系统。通过试验发现:该试验台装置符合设计要求。
在对半干化污泥燃烧机理研究的基础上,完成了300t/d污泥循环流化床焚烧炉的设计和校核计算,给出了该焚烧炉的总体结构图。
通过本文对半干化污泥在流化床内的燃烧特性以及污染物排放特性的试验研究,为半干化污泥流化床焚烧技术的发展建立了一定的实践基础,也为今后的深入研究提供了有价值的参考数据。
Urbanization development and sewage industry development have brought about a soaring increment of sewage sludge, how to dispose the ever-increasing sewage sludge and eliminate their hazard has become a serious problem with which people are currently confronted. The final objective of sewage sludge is to meet the requirements of decrement, stabilization and resources recycle. To conform to the new trend, incineration has become a promising disposal method. Whereas, sewage sludge is high moisture and low caloric fuel, which weakness the feasibility and economics of incineration. In order to spreads the application of these new technologies, the combustion of semi-dried sewage sludge is being considered. So it’s necessary to study the combustion and the main pollutants emission characteristics of semi-dried sewage sludge collected from a sludge drying apparatus in CFB.
At first, we introduced the classification and harm and source of sewage sludge, the methods of disposal about sewage sludge and sewage sludge disposal present situation of our country summarized the research results about fluidized bed sewage sludge burn. On this foundation, we determined this paper content.
We studied the basic characteristics of semi-dried sewage sludge including the component, the pyrolysis and combustion characteristics, the heavy mental content and ash melting point of the semi-dried sewage sludge. Burnout index and general combustion parameter of sludge were calculated, and combustion kinetic parameters were obtained by the Coasts method. The experimental results provide basic data for the energy application of sewage sludge and the adjustment of sludge incineration devices.
We studied the combustion characteristics of semi-dried sewage sludge in CFB incinerator, and tested the emission of second contaminant in the incineration process. Through combustion of semi-dried in CFB incinerator, we understand and grasp the operation and emission characteristics of semi-dried sewage sludge incineration in the CFB incinetator.
We build a large CFB incinerator. This paper introduced the system and structure of this test facility in detail. The experiment discoveries explain that the test facility accords with the design requirement.
On the basis of study of combustion mechanism of semi-dried sewage sludge, the overall thermodynamics design and verify calculation of the 300t/d sewage sludge circulating fluidized bed incinerator is carried out and the general drawing of incinerator is given.
The conclusions from above experiment are helpful to the development of combustion disposal methods of semi-dried sewage sludge and supply valuable reference datas for more research about semi-dried sewage sludge combustion in CFB.
引文
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[2]李金红,何群彪.欧洲污泥处理处置概况.中国给水排水,2005, 21(1):101-103
[3]岑可法,倪明江,骆仲泱等.循环流化床锅炉理论设计与运行,北京,中国电力出版社,1998,10-12
[4]冯俊凯,岳光溪,吕俊复.循环流化床燃烧锅炉.中国电力出版社,2003
[5]李国鼎,金子奇等编.固体废物处理与资源化,清华大学出版社
[6]尹军,谭学军.污水污泥处理处置与资源化利用.北京:化学工业出版社,2005.1-2
[7] Brain Hemphill, Fluid Bed Technology for Sludge Destruction, Water/Engineering&Management, 1998,12:37-40
[8] Ann Ches Nut Hashbach, Putting Sludge to work; Pollution Engineering, 1991,12:62
[9] Lowe, Paul etal, Revival of incineration in the UK, Water Sci.Technol, 1990,23:10-12
[10] Gillian Hand-Smith, Sludge Disposal: the Future of High-tech Sludge incineration. Wastes Management, 1999,3:41-42
[11]曾庭华,污泥在流化床中的焚烧特性及其二次污染研究,浙江大学博士学位论文,1997
[12] Janust. A.Kozinski et al, Combustion of Sludge Waste in FBC distribution of metals and particle sizes, Proc.of 13# Inter.Conf.on FBC,ASME, 1995: 1493
[13] E.J. Anthony et al, The Technical, Environmental, and Economic feasibility of Recovering Energy from Paper mill Residual Fiber,Proc.of 12# Inter.Conf.on FBC,ASME, 1993:239
[14]赵庆祥,污泥处理的新途径燃料化,化工环保,1988, 8 (3):156
[15] Tsukishima Kikai Co.Ltd, 2001
[16] Jea K.Lee,Two-Stage Swirl-Flow Fluidized Bed Incineration of Sewage Sludge,Proc.of Inter.Conf.on FBC,1993,2:1181
[17]李一铆,污泥焚烧炉隔热衬里的施工及投运,化工设计通讯,1992,18(4):59
[18]胡光陨,城市污泥的合成染料的应用研究,中国给水排水,1996 (2):13-15
[19]曾庭华等,污泥在流化床中的焚烧特性研究,中国工程热物理年会燃烧学术会议论文集,宜昌,1995,Ⅲ:58-63
[20]蒋旭光等,用于处理造纸污泥的流化床燃烧新技术,动力工程,1994,4:34-38
[21] Li Xiaodong, Yan Jianhua, Study of a Fluidized bed Combustion Technology Co-firing Municipal Solid Waste and Coal and Its Applications Proceeding of the 15th International Conference on Fluidized Bed Combustion, Savannah, May 16-19, 1999
[22]丁奉华,城市污水污泥的焚烧研究,清华大学硕士学位论文,2001
[23]曾振平,污水污泥的燃烧与热解特性研究,华中理工大学硕士学位论文,1999
[24]苏胜,李培生等人,污泥基本特性及其与煤混烧的热重研究,热力发电,2004,9:69-74
[25]李斌,池涌,李爱民等.造纸污泥与废水污泥流化床焚烧时N0x和S02的排放特性研究.工程热物理学报,1998,19(6):776-779
[26]李爱民,王志,魏砾宏等.污水污泥在流化床内燃烧特性的试验研究.沈阳航空工业学院学报,200118(4):43-45
[27]陈鸣.城市污水处理厂污泥最终处置方式的探讨.中国给水排水,2000(16)
[28]万伟泳.城市污水处理厂脱水污泥的焚烧处置.中国给水排水,2006, 22(18):68-71
[29]唐春忠.循环经济显身手污泥焚烧创效益.中国资源综合利用,2005, (7):18-19
[30]杨新海,张辰.上海市石洞口城市污水处理厂污泥干化焚烧工程.给水排水, 2003,29(9):19-22
[31]徐左正,张辰.上海市石洞口城市污水处理厂调试方案研究.给水排水, 2004,30(2):33-35
[32]许洲.上海石洞口污水厂污泥处置系统的调试.中国给水排水,2005,21(12): 98-99
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