共查询到20条相似文献,搜索用时 187 毫秒
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焚烧具有减容、减量、可回收能量等特点,是危险废物处置最有效的手段之一。国内大多危险废物处置项目均为区域性危险废物处置场,处理的废物种类很多,入窑焚烧的成分波动大,造成焚烧工况不稳定、烟气排放不达标等问题,形成治污企业不自洁的现象。针对这些问题,提出将焚烧控制过程前移,通过智能仓储和预配伍系统的控制管理,根据物料特性进行分类预处理,将焚烧控制过程前移,保证入窑焚烧的危险废物热值、元素含量等稳定在一定范围内,有效提高窑炉焚烧工况的稳定性。 相似文献
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危险废物焚烧处置过程中会生成包含二噁英在内的有毒有害物质,必须对烟气进行严格的净化处理。目前,危险废物焚烧采用温度骤降方式(雾化液滴与高温烟气混合实现对气体污染物组分的急冷降温),以减少二噁英异相合成的时间。急冷控制是焚烧尾气净化的重要技术,在以往项目中经常出现急冷雾化不良、水/气压力调节反应迟缓、急冷过喷、急冷欠喷等问题,对项目的顺利验收与运营造成影响。文章通过分析危废焚烧处理的工艺特点、结合项目经验,对急冷系统的设计与控制进行了研究与完善。该设计研究结果已在后续项目中予以应用。 相似文献
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回转窑危险废物焚烧系统的优化设计 总被引:1,自引:0,他引:1
回转窑是危险废弃物处理中最有效的设备,具有废物处理种类多等优点。随着回转窑危险废物焚烧系统应用越来越广泛,该系统在应用中的一些问题也暴露出来(如进料水套容易破坏、废物在窑内焚烧不充分、回转窑尾耐火材料容易脱落等),需要根据工程应用进行设备优化设计。文章分析了回转窑焚烧系统出现问题的原因,并给出了优化设计方案,对回转窑焚烧系统的优化设计提供了借鉴。 相似文献
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德、日两国循环经济立法经验及对我国的启示 总被引:1,自引:0,他引:1
循环经济立法是发展循环经济的前提,对发展循环经济具有首要的、决定性的作用。借鉴德国、日本两个经济发达国家循环经济立法的成功经验,提出建立符合我国国情的循环经济立法模式和循环经济法律体系的构建。 相似文献
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Magda Magdy Abd El-Salam 《Journal of environmental management》2010,91(3):618-629
This study investigated the hospital waste management practices used by eight randomly selected hospitals located in Damanhour City of El-Beheira Governorate and determined the total daily generation rate of their wastes. Physico-chemical characteristics of hospital wastes were determined according to standard methods. A survey was conducted using a questionnaire to collect information about the practices related to waste segregation, collection procedures, the type of temporary storage containers, on-site transport and central storage area, treatment of wastes, off-site transport, and final disposal options. This study indicated that the quantity of medical waste generated by these hospitals was 1.249 tons/day. Almost two-thirds was waste similar to domestic waste. The remainder (38.9%) was considered to be hazardous waste. The survey results showed that segregation of all wastes was not conducted according to consistent rules and standards where some quantity of medical waste was disposed of with domestic wastes. The most frequently used treatment method for solid medical waste was incineration which is not accepted at the current time due to the risks associated with it. Only one of the hospitals was equipped with an incinerator which is devoid of any air pollution control system. Autoclaving was also used in only one of the selected hospitals. As for the liquid medical waste, the survey results indicated that nearly all of the surveyed hospitals were discharging it in the municipal sewerage system without any treatment. It was concluded that the inadequacies in the current hospital waste management practices in Damanhour City were mainly related to ineffective segregation at the source, inappropriate collection methods, unsafe storage of waste, insufficient financial and human resources for proper management, and poor control of waste disposal. The other issues that need to be considered are a lack of appropriate protective equipment and lack of training and clear lines of responsibilities between the departments involved in hospital waste management. Effective medical waste management programs are multisectoral and require cooperation between all levels of implementation, from national and local governments to hospital staff and private businesses. 相似文献
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桐庐县富春江、分水江库区漂浮物主要由水葫芦、生活垃圾、动物尸体三部分构成,结合桐庐县垃圾处理处置设施建设现状及规划,对水葫芦及生活垃圾采用机械打捞-压缩中转-烘干(仅水葫芦)-焚烧工艺,对动物尸体采用人工打捞-冷藏车运输-冷库储存-焚烧工艺。为确保水葫芦焚烧可行性,比较了烟气直接烘干和蒸汽间接烘干两种工艺,推荐采用蒸汽间接烘干。 相似文献
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以南方经济发达地区100 tDS/d的污泥干化焚烧发电工程为例,介绍了污泥处置的热电联用系统.工程利用离心干化设备,以废蒸汽为热源干化污泥,提高热值,干化污泥与生物质在循环流化床锅炉中协同焚烧,焚烧产生的蒸汽通过汽轮发电机组发电自用.烟气经过多级处理后达标排放,废水、飞灰和炉渣都得到有效的处理与处置.该工程的实施缓解了... 相似文献
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A generic comparison of the airborne risks to human health from landfill and incinerator disposal of municipal solid waste 总被引:3,自引:0,他引:3
A comparison of the potential risks to human health from municipal solid waste (MSW) incineration and landfill on a generic basis is attempted. For this purpose a 'worst case' approach is adopted and a number of assumptions regarding the size and activities of each waste disposal method are made. The airborne pollutants measured for an incinerator are different from those for a landfill with or without gas collection. However, based on the available information it appears that as far as airborne pollution is concerned, landfill sites without gas collection pose a potentially higher generic risk to human health than MSW incinerators performing to Environmental Agency (UK) standards. This analysis cannot be used to replace specific evaluations for a particular incinerator or a landfill site because local conditions can have a very large impact on the magnitude of risks involved. 相似文献
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通过分析各种医疗废物处理技术的特点,指出医疗废物集中焚烧处置技术能够有效处理医疗废物、满足国家对医疗废物处理的要求,适宜在医疗废物集中处置项目中广泛应用。但该技术在实际工程应用中,还存在如处理成本高、设备使用寿命短和二英排放不易控制等问题,尚需进一步研究加以克服。 相似文献
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为有效抑制生活垃圾在机械炉排炉焚烧过程中NOX的产生,有研究者提出采用烟气回流技术可以有效抑制NOX的生成和排放。目前关于烟气回流技术的理论研究和数值模拟较多,而基于实际工程应用的研究较少。选择了烟气回流工艺在山东省某生活垃圾焚烧项目上的应用情况进行研究,从烟气回流工艺的技术原理、排放指标、运营数据和经济性等方面进行了分析,同时也总结了本工艺在应用过程中需注意的事项。研究表明,采用烟气回流工艺的#3炉引风机出口NOX平均排放和氨水平均用量比未采用烟气回流工艺的#1炉,分别降低了25.8%和43.7%,且NOX浓度波动与烟气含氧量密切相关。总体上,烟气回流工艺的使用能够有效抑制NOX的产生,并且同时减少了氨水等物料的消耗,降低了运营的成本。但是当进入焚烧炉的垃圾品质出现急剧恶化的情况下,会影响焚烧炉的燃烧工况而使烟气回流量降低,导致NOX减排效果下降。 相似文献