共查询到18条相似文献,搜索用时 156 毫秒
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项目利用200 t/d炉排炉和5 000 t/d新型干法水泥熟料生产线协同处置天等县200 t/d城乡生活垃圾。介绍了水泥窑协同处置生活垃圾技术工艺流程及技术特点,广西天等水泥窑协同处置生活垃圾项目相关情况、设计特点及运行效果,其中水泥线产量及热耗,以及窑尾二恶英、酸性气体及重金属等污染物排放指标都符合相关设计标准。 相似文献
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详细介绍了水泥窑协同处置城市生活垃圾示范线的项目背景、工艺、运行效果、重金属及其浸出情况对环境的影响等.结果表明,水泥窑协同处置城市生活垃圾符合“无害化、减量化、资源化、集约化”的原则,符合国家资源综合利用政策,可为我国环保产业发展和资源综合利用起到示范作用,且对熟料生产及产品性能影响不大. 相似文献
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河北金隅鼎鑫水泥有限公司水泥窑协同处置生活垃圾项目采用了“机械生物法预处理+热盘炉焚烧”水泥窑协同处置工艺。文章介绍了项目工艺流程和主要设备特点,分析了项目改造过程中各个部分细节上的优化措施和经验,最后采取措施基本消除了协同系统对熟料生产的不利影响,保证了熟料质量,而且提升了熟料台时产量。 相似文献
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<正>对于不了解水泥生产的民众而言,水泥窑如何处置生活垃圾,优势何在?是否存在老百姓关注的二噁英、重金属排放问题?水泥窑协同处置生活垃圾前景如何,又面临哪些现实困难?带着这些问题,记者近日进行了深入调研——措施:将垃圾吃干榨尽"垃圾围城"困扰着许多城市,为寻求破解之道,"水泥窑协同处置生活垃圾试点"被正式提上日程。而水泥窑协同处置生活垃圾,在国外已经成熟应用达40余年,成为发达国家处理生活垃圾的主要方式之一。 相似文献
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Destruction of industrial waste in cement rotary kilins(CRKs) is an alternative technology for the treatment of certain types of industrial waste(IW).In this paper,three typical types of industrial wastes were co-incinerated in the CRK at Beijing Cement Plant to determine the effects of waste disposal(especially solid waste disposal )on the quality of clinker and the concentration of pollutants in air emission.Experimental results show that(1) waste disposal does not affect the quality of clinker and fly ash,and fly ash after the IW disposal can still be used in the cement production,(2) heavy metals from IW are immobilized and stabilized in the clinker and cement,and (3) concentration of pollutants in air emission is far below than the permitted values in the China National Standard-Air Pollutants Emission Standard(GB 16297-1996). 相似文献
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Junli Zhang Jianguo Liu Chen Li Yongfeng Nie Yiying Jin 《Cement and Concrete Research》2008,38(5):675-680
The release potential and leaching behavior of five heavy metals (As, Cd, Cr, Cu and Pb) in raw material, clinker and mortar were studied by the three-step sequential extraction procedure proposed by the commission of the European Communities Bureau of Reference (BCR) and NEN7341 leaching test. The results of two experimental methods were compared to show the fixation difference of heavy metals among three kinds of samples. The results of NEN7341 leaching test show that the maximum leached concentration of cement products is low and the leached fraction of five heavy metals represents less than 15% of the total heavy metal content of the cement product. To refer to the bulk content as a criterion of environmental impact is not appropriate. The results of sequential extraction procedures show that the bonding forms of heavy metals change a lot in three samples. The contamination factor (Cf) and the leached fraction of each element in three samples indicate that all the elements are better fixed in cement products than in raw material due to calcination and hydration. To most elements, the relative metal retention is higher in mortar than in clinker. Compared within the five analyzed elements, Cd is better retained and Cu is worse retained in the same kind of sample. 相似文献
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本文介绍了水泥窑协同处置填埋场陈腐垃圾的工程实例,选择某填埋场8年以上填埋龄的陈腐垃圾为研究对象,经精细化作业挖掘后,利用“某水泥窑无害化协同处置450 t/d生活垃圾示范线项目”进行预处理和水泥窑协同处置。由于陈腐垃圾不可燃物比例高、含水率低、有机质含量低、化学成分不同等特征,利用水泥窑协同处置陈腐垃圾时,需要对生料配比进行必要的调整和配合。通过对比水泥窑的窑磨系统操作参数,提出陈腐垃圾的处置不会对水泥窑运行产生不利影响,且处置陈腐垃圾后的熟料强度均能满足要求。本工程实例为水泥窑协同处置陈腐垃圾技术推广提供借鉴和参考,为实现老垃圾填埋场的土地再利用或库容释放,以满足填埋场重复填埋使用提供技术指导。 相似文献