共查询到19条相似文献,搜索用时 906 毫秒
1.
2.
用吉布斯自由能最小化方法模拟垃圾气化熔融工艺 总被引:1,自引:0,他引:1
基于吉布斯(Gibbs)自由能最小化方法建立了城市生活垃圾气化熔融技术工艺模型,模拟计算结果与已有文献的试验结果吻合良好。通过敏感性分析,获得了垃圾气化气体低位热值和熔融温度的相互关系,在此基础上,讨论了城市生活垃圾低位热值、垃圾含水率和气化炉过量空气系数对气化气体低位热值和气化温度的影响规律。结果表明:在无辅助热源情况下,进入熔融炉的气化气体低位热值必须高于3000kJ/m3,其燃烧绝热火焰温度方能达到1 350℃;气化气体低位热值随垃圾低位热值的增大和气化过量空气系数的减小而显著增高;气化温度随垃圾含水率的降低和过量空气系数的增大呈现线性升高趋势。模拟结果可为确定适合气化熔融技术的垃圾基本特性参数提供有益参考。 相似文献
3.
4.
5.
垃圾焚烧发电技术主要问题及其对策 总被引:3,自引:0,他引:3
介绍了我国城市生活垃圾的主要处理方式;通过对国内外情况的比较与分析,得出我国城市生活垃圾处理的最佳方式是CFB焚烧(垃圾与煤可混烧)发电;介绍了CFB发电技术的特点、工艺流程、存在的问题及未来的发展前景。 相似文献
6.
7.
8.
10.
垃圾衍生燃料气化动力学特性研究 总被引:1,自引:0,他引:1
采用气化工艺处理城市固体废物不仅可以从中回收能源,同时还可以降低二次污染的影响。采用热重分析法对垃圾/生物质为1:1、1:2、1:3和纯生活垃圾的RDF样品进行气化研究,通过分析不同物料比、不同升温速率、不同气氛、不同终温对RDF气化反应过程的影响,得出RDF气化反应动力学参数。研究表明随着升温速率的增加,产气中H2的产量呈上升趋势,CO和CH4的产量先升高再降低;随着O2含量的增加,RDF的气化效果越来越好,其气化产气中H2的含量呈上升趋势。 相似文献
11.
城市垃圾热解气化技术,又称热分选技术,是第3代垃圾变能源的技术。它是一个完全无污染的、资源完全回收的垃圾处理方法。在处理过程中,无机成分熔合成建筑材料或金属合金,有机垃圾则完全转化成可燃气体被用来发电,复杂的有机化合物(包括二恶英和呋喃)完全被分解,废水经过处理也被回收利用,因此达到垃圾减量化、无害化和资源化的处理目标。 相似文献
12.
随着垃圾焚烧技术的广泛应用,垃圾焚烧飞灰中重金属污染问题日益严重。介绍了目前焚烧垃圾飞灰的处理方法、研究进展和发展方向。 相似文献
13.
14.
15.
Krauchi P. Wager P.A. Eugster M. Grossmann G. Hilty L. 《Technology and Society Magazine, IEEE》2005,24(1):45-53
RFID technology is one of the forerunners of pervasive computing, and as such is expected to play an important role in many applications of daily life, especially in the form of smart labels. However, market investigations and a material analysis of a smart label shows that the use of smart labels does not considerably affect the recycling or disposal of packaging materials, if precautionary measures are taken, such as eco-design and, where necessary process modifications. Today in industrialized countries end-of-life information and communication technology (ICT) equipment is processed separately from other waste streams, given its material composition and appliance size. The waste management processes studied are municipal solid waste incineration and recycling of glass, paper, cardboard, polyethylene terephthalate (PET) and aluminum. 相似文献
16.
Upon analyzing the methods for processing epidemiologically hazardous medical waste (MW), it has been shown that the problem of safe disposal of MW with respect to the formation of polychlorinated dibenzo-para-dioxins and dibenzofurans (dioxins and furans) is acute and requires scientifically sound solutions. The typical morphological and elemental composition of the MW classes B and C and their thermal properties were determined, and the modern literature on the processes of thermal detoxification of dangerous MW was analyzed. It has been found that the process of pyrolysis is the most adaptive to various types of solid waste. Currently, pyrolysis attracts special attention due to its flexibility in treating various combinations of wastes only by changing the operating parameters of the process, such as temperature and heating rate. Pyrolysis is particularly important in connection with the growing amount of polymers in the waste of medical institutions, including those containing chlorine. In this case, the pyrolysis method presents the possibility of using a number of circuit solutions to prevent the formation of dioxins and furans. It has been shown that the use of the pyrolysis method ensures, along with full satisfaction of the requirements of sanitary and hygienic standards, the environmental safety of the MW detoxification process as compared to other high temperature methods (combustion and gasification). Next, possible directions of utilization of secondary resources received in the process under consideration were analyzed. In the proposed scheme of the installation for safe disposal of medical waste on the basis of the pyrolysis process, its products (excess gas, heat of the products of combustion, etc.) are expected to be used to generate electrical and thermal energy; semicoke as a solid residue of the process will be converted to activated carbon. 相似文献
17.
安徽省第一座垃圾焚烧热电厂的设计体会 总被引:1,自引:0,他引:1
芜湖开发区垃圾焚烧热电厂是迄今为止安徽省唯一一座垃圾发电厂。该项目获2005年度安徽省优秀工程设计一等奖,其设备全部国产化,设计中提出了一条崭新的、行之有效的设计思路,不仅解决了垃圾处理、输送、焚烧系统等主要设计难点,还在实现垃圾减量化的同时有效地避免了二次污染。取得了良好的环境、社会、经济效益,成功地摸索出一条适合国情、省情的垃圾处理方式。 相似文献
18.
采用气化焚烧炉对典型城市固体废弃物与煤的混合物料进行气化试验,气化介质分别为空气、氧气及水蒸气。研究了物料、气化温度、气化剂及气化剂流量等对气化产气特性的影响,结果表明,当物料含可燃质高时,产气品位好;空气作气化剂时产气的热值低于氧气作气化剂时的产气热值;当气化剂为氧气时,加入适量的水蒸气可提高产气品位;气化剂的流量发生变化时,气化产气成分相应改变;气化温度升高后,产气中燃气含量有所增加。 相似文献
19.
木屑和聚乙烯流化床共气化实验研究 总被引:4,自引:3,他引:4
为揭示城市生活垃圾中典型组分在气化过程中的相互作用,该文以木屑和聚乙烯为研究对象,在流化床中进行了单组分和双组分共气化实验研究。结果显示,通过控制燃料量和反应温度,可以避免流化恶化现象发生。木屑与聚乙烯共气化时,CH4的浓度分布与单组分聚乙烯气化CH4趋势一致;共气化时,产品气中CO浓度随着温度升高而降低,近似于单组分木屑和聚乙烯气化时CO浓度的线性组合;共气化时C2Hm生成量减少。静止床高增加时,有利于CO、H2、CH4以及低碳氢化合物的生成。 相似文献