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城市垃圾气化熔融焚烧技术因能有效地抑止二恶英和重金属生成而日益受到重视。首先从热力学角度建立了城市垃圾气化熔融工艺临界热值的计算模型,具体分析了垃圾中水份、灰份和有机成份的变化对临界热值的影响。结果表明:随着空气预热从25C提高到250C,垃圾临界热值从8.7MJ/kg减少6.4MJ/kg,而垃圾中灰份过高也不利于气化熔融工艺。继而从气-固反应器的角度比较了回转窑、流化床和炼钢高炉作为基础炉型的气化熔融工艺的技术特点和适用条件,为国内未来垃圾气化熔融工艺的选择提供了参考。图6表2参14 相似文献
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回转窑处理城市垃圾的技术特点与前景展望 总被引:1,自引:0,他引:1
论述了我国城市垃圾处理方式主要是链条炉焚烧处理、回转炉焚烧处理和流化床焚烧处理为主的现状,分析论证了水泥回转窑处理城市生活垃圾具有其它处理方式不可替代的优势,认为利用水泥回转窑处理城市生活垃圾是一条适合我国国情的可持续发展之路。最后讨论了水泥回转窑处理城市生活垃圾所涉及的技术研究内容,提出了在我国利用该技术是一项复杂的系统工程,需要全社会的共同努力。 相似文献
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异重流化床垃圾焚烧技术的试验研究 总被引:12,自引:2,他引:10
对较典型的城市垃圾状况进行了分析,同时在大型中试试验装置上运用异重流化床焚烧技术对垃圾焚烧特性进行了研究,研究结果表明:异重流化床焚烧技术在保证垃圾稳定焚烧的同时,实现降低NOX,SO2等污染物的排放,达到国家排放污染的要求。此种流化床焚烧技术特别适用于处理热值相对较低的中国城市生产垃圾。 相似文献
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随着环保要求的日益严格,以及危险废物焚烧技术和回转窑焚烧技术的进步,应选取更合适的方式来处置危险废物,同时选取合适的烟气净化系统来保证烟气排放的达标。 相似文献
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城市垃圾的能源化技术及其在国内的发展 总被引:1,自引:0,他引:1
城市垃圾成为日益严重的环境问题、社会问题和经济问题,如何利用城市垃圾,使其变废为宜,为人类服务是目前人们关注的热点。主要介绍在法国采用的垃圾液化焚烧发电技术以及目前垃圾焚烧发电在国内的发展情况。 相似文献
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双回转式固体废弃物焚烧系统设计 总被引:1,自引:0,他引:1
提出将回转窑技术与高温空气燃烧技术相结合,形成一种兼有稳定燃烧和控制二英、呋喃等污染物排放双重功能的新型固体废弃物焚烧方式。给出了回转窑焚烧系统的结构简图,介绍了其工作原理。分析了高温空气燃烧技术的高效低污染特性。针对中小规模医院的自备焚烧炉,设计了双回转式焚烧系统,并进行了热力计算。 相似文献
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危险废物回转窑焚烧处置工艺具有诸多优点,但是当危险废物焚烧产生的灰渣熔融温度较低时,窑内的高温气氛会将灰渣颗粒熔融成液相,导致回转窑的结渣。灰渣的熔融实验结果证明,灰渣的熔融温度比较低,变形温度仅有1000℃左右。化学组分对灰渣熔融温度的影响研究表明,SiO2、Al2O3、CaO和CaSO4都对灰渣的熔融温度起到了升高的作用。采用计算机控制系统对整个系统进行监测、控制和管理,控制回转窑的温度在略低于灰渣熔融温度的水平运行,或者对危险废物在焚烧前进行合理的预混配伍,都能起到较好的预防回转窑结渣的作用。 相似文献
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FANG Chunqi JIANG Xuguang LV Guojun YAN Jianhua LIN Xuliang SONG Huibo CAO Junjun 《热科学学报(英文版)》2020,29(1):108-114
Chemical synthetic residual is one of the solid wastes generated from pharmaceutical industry.The pyrolysis and combustion characteristics of chemical synthesis residual were investigated using a thermogravimetric analyser coupled with Fourier transform infrared spectroscopy(TG-FTIR)in this study.The processes of pyrolysis and combustion can be divided into three stages.The average weight loss rate of pyrolysis process at low temperature was higher than that of combustion.The kinetic parameters of chemical synthesis residual during pyrolysis and combustion were calculated based on the TG results.Acetic acid and 4-aminophenol were the main evolved matter observed in the pyrolysis process.The emission characteristics of combustion at low temperature were similar to that of the pyrolysis,while CO2 was found as the major gaseous product at high temperature.A high temperature about 850°C is needed to make sure the complete combustion of chemical synthesis residual. 相似文献
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《能源学会志》2020,93(1):272-280
Co-combustion of two municipal waste materials (food waste and bio-solids) with an agricultural residue was carried out in a fluid bed unit, for investigating the thermal exploitation of these wastes for energy production. The reactivity of the fuels was studied by thermogravimetric analysis, while temperature profiles, gaseous emissions and combustion efficiency were determined under different operating conditions of the fluid bed reactor. By blending municipal solid waste or sewage sludge with olive stone burnout was improved, nevertheless even at high percentages of these wastes in the mixture combustion efficiency was very good, ranging between 98.5 and 99.5%. A reduction in excess air from 50 to 30%, or an increase in fuel feeding, resulted in higher SO2 and NOx emissions. SO2 levels from olive stone/municipal solid waste blends were negligible, while those of NOx exceeded emission guidelines. To meet legislation without any extra measures, generally the share of municipal solid waste in the mixture should be up to 10%, reactor loading for all mixtures below 0.72 kg/h and excess air over 40%. 相似文献
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Some aspects of measurement, interpretation and practical use of results from solid fuel reactivity studies 总被引:2,自引:0,他引:2
Jacek
elkowski 《Energy》2001,26(12):1185-1195
The reactivity of solid fuels i.e. fossil fuels, waste fuels and coal processing products is a feature decisive for the reaction rate under various burning conditions and affects both the burn-up factor of the fuel in the furnace and hence also the combustion efficiency, which further influences the usability of the so-called furnace wastes (too high content of underburnts excludes further utilisation), the ability of fuels to create NOx, temperature distribution in the furnace etc. The reactivity of solid fuels is not actually tested on the standardised basis because of the lack of unified definitions of terms, deficiency of a fairly simple laboratory method for the reactivity determination and of a practical method for the interpretation of the test results. A step towards standardisation of the methodology of reactivity tests can be made by using such terms as combustion intensity u [kg/s], surface combustion rate q [kg/m2/s] and chemical reaction rate constant Kkin [kg(C)/m2/s/Pa0,5] together with kinetic constants k and E determining the fuel reactivity. 相似文献
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高效低污染燃烧及气化技术的最新研究进展 总被引:4,自引:0,他引:4
根据参加2003日本神户国际动力工程会议的情况,着重评述了化石燃料低NOX燃烧、固体废弃物焚烧、煤及固体废弃物气化等技术领域的最新研究进展。目前烟气脱硝成为中国电厂技术革新的热点问题,炉内高效低NOX燃烧是一种适于我国国情的高效廉价的技术路线。热解和焚烧相结合的固体废弃物利用技术在日本已得到较为广泛的应用,但是它利用蒸汽轮机发电对于未来小型发电系统而言效率较低,而热解和气化相结合的固体废弃物利用技术是利用内燃机或燃气轮机发电,对于日处理废弃物量小于200t d的发电系统其效率较高,因此成为下一代分布式能源利用系统的良好选择。图7参1 相似文献
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结合自身技术优势和在窑炉行业的研究,在原来开度控制燃烧技术的基础上,研发了空燃比燃烧控制模式。该项技术在窑炉行业推广使用后,在满足产品烧成工艺的条件下,可以更好的控制燃料的使用,达到节能的效果。 相似文献