共查询到19条相似文献,搜索用时 140 毫秒
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在发电厂焚烧烟气净化收集过程中,垃圾焚烧之后产生的残余粉状物质则是飞灰,其属于危险废物(编码为HW18)且处理难度较大,其中含有有机污染物二噁英与Cr、Cd、Hg等重金属。本文重点分析水泥窑协同处置垃圾焚烧飞灰问题,探究水泥窑协同处置垃圾焚烧飞灰的技术途径,以便更好的提升其技术应用效果,并为类似水泥窑层面的研究提供参考依据。 相似文献
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垃圾焚烧产生的飞灰由于季节性和地域性等因素影响,选择药剂稳定和水泥固化方法予以处理存在很大的限制,因此迫切需要寻求先进合理的措施予以处理,确保垃圾焚烧产生的飞灰得到有效处置.本文在介绍生活垃圾焚烧飞灰特性的基础上,重点研究了重金属螯合稳定/水泥固化处理的相关内容,提出切实可行的技术措施. 相似文献
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为了验证垃圾焚烧飞灰资源化利用的工艺可行性,搭设了飞灰两级水洗资源化中试产线。评估了设计工艺对飞灰的预处理效果,同时验证了系统运行的稳定性,总结了工程化过程中容易出现的问题,为建设规模化飞灰处置中心积累了经验。通过该中试产线处置的飞灰达到水泥窑协同处置标准,副产盐可循环利用于工业生产。 相似文献
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生活垃圾焚烧飞灰污染特性及其控制研究综述 总被引:1,自引:0,他引:1
随着生活垃圾焚烧技术不断推广和应用,对生活垃圾焚烧飞灰的污染问题及处理、处置方式正日益受到人们的关注,介绍垃圾焚烧飞灰的污染特性,并综述当前飞灰的管理要求和控制技术方法,提出相应的控制建议。 相似文献
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阐述了城市垃圾焚烧飞灰的基本性质和不同粒径颗粒所含各种重金属含量以及它们对水体和环境的危害,介绍了不同粒径飞灰的物理化学性质和在不同条件下的处理方式,在此基础上提出了一种"无害化"、"资源化"、"减量化"的有效措施处理飞灰,即水泥窑煅烧处理;还介绍了城市垃圾焚烧产物中二噁英的基本性质、毒性和对人体的危害,从垃圾入炉前、焚烧时、烟气中等三个方面进行处理,并提出了减少二噁英的生成防治措施及去除的方法;介绍了城市垃圾焚烧底灰的物理化学性质,提出了一种资源化利用的方案,即制成烧结砖. 相似文献
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粉煤灰表面改性效果的分析与探讨 总被引:1,自引:0,他引:1
以鸡西电厂粉煤灰为原料,选择多种表面处理剂对粉煤灰进行处理,并测定活化指数、润湿接触角等表面评价指标。分析改性粉煤灰样品的药剂吸附强度、吸水率、有机溶剂中的沉降行为。实验表明:药剂种类对粉煤灰表面改性效果有很大的影响,对于鸡西电厂粉煤灰而言,钛酸酯偶联剂是最优的表面改性剂。 相似文献
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Satish Kumar Gurprit Singh S.K. Mohapatra 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2016,38(20):2955-2962
With increasing environmental awareness, utilization of fly ash has become an attractive alternate to disposal. The objective of the present study was to investigate the physical, chemical, mineral, and rheological characteristics of fly ash for their potential utilization in stowing operation. The study was conducted with fly ash collected from the ash disposal system of Guru Govind Singh thermal power plant, Ropar, Punjab, India. From the characterization of the fly ash sample, it was found that the ash sample is enriched predominantly in silica; alumina and iron oxides fall under the category of F-type fly ash. The major mineral crystalline phase identified in the ash sample is quartz and mullite. Because of the properties of fly ash, it can be used as a stowing material in coal mines. The data obtained for critical velocity will help design a slurry pipeline system for the hydraulic stowing of fly ash slurry at any concentration and pipe size. 相似文献
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为研究不同分形维数玻璃粉对胶砂强度的影响,碾磨绿色废玻璃10、20、30min使其分别成为分形维数为2.375 25、2.081 70、2.967 83的粉末状态,作为辅助胶凝材料以内掺法分别替代胶砂中水泥10%、20%、30%的用量,同时以粉煤灰为参照试验,测得试件7、14、28、35、120d不同龄期的抗压强度。结果表明,不同分形维数的玻璃粉与粉煤灰掺量均为10%时对提高试件强度相对较佳;分形维数为2.967 83的玻璃粉掺量为10%时对拌合物前期强度的影响与粉煤灰作用相差无几,其后期强度影响虽微弱于粉煤灰,但强度均优于基准试件。 相似文献
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Granular phase changing composites for thermal energy storage 总被引:4,自引:0,他引:4
Granular phase changing composites for thermal energy storage were made of granular porous materials and organic phase changing materials by means of vacuum impregnation method. Experimental studies on the vacuum impregnation method, phase changing behavior, chemical compatibility between porous materials and phase changing materials, and sealing performance of coating materials arrived in the following conclusions. Firstly, the vacuum impregnation method is effective in loading porous materials with phase changing materials; and its setup is simple, cheap and easy of scale-up. Secondly, organic phase changing materials (including fatty acids and their derivatives, and paraffin) and inorganic porous materials (including expanded clay, expanded fly ash and expanded perlite) are suitable raw materials for the phase changing composites with respect to chemical compatibility, large thermal energy storage density, and feasibility of large scale processing. Thirdly, thickened latex is the best choice of coating materials for the porous material granules, whose sealing performance is about 40-fold higher than that of normal cement paste and about sevenfold higher than that of the best polymer modified cement paste in this paper. 相似文献