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为开发适合我国城市生活垃圾处理的低污染气化熔融技术,对城市生活垃圾中广泛存在的废弃木料组分进行了流化床热解与气化试验。流化床中,在反应温度400~700℃、过量空气系数0~0.8的范围内,对木料进行了系统的热解气化试验,分析了反应产物特性及其产量变化规律。结果表明,热解温度5000℃,热解油产量最大,可占原料质量的38%,热解气产量随温度增加而增大;气化温度600℃、过量空气系数0.4时,气化效率最高,达到73%,此时每标准立方米气化气热值为5800kJ,气化气产率为2.01m^3/kg;并进行相关的反应特性及机理分析。 相似文献
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城市生活垃圾气化熔融焚烧技术 总被引:2,自引:0,他引:2
近年来,为防止全球气候变暖,社会上对环境保护的要求日益严格。尤其是要求城市生活垃圾处理最大限度地采用无害化技术,抑制二恶英的排放。能够遏制二恶英产生和排放的无害化城市生活垃圾气化熔融焚烧技术被提出。本技术一般分两类,一类为垃圾气化 灰渣熔融焚烧技术,该技术的工艺流程为:先将城市生活垃圾在500-600℃温度下的热解气化制得可燃气体,制得的气体再根据用途进一步精制,垃圾中95%以上的含氯物质经济去所后所剩下的含碳灰渣在温度为1300℃以上的熔融燃烧设备中进行熔融处理,原垃圾中99.8%以上二恶英可被分解掉,无害化熔融渣可以多种用途;另一类为垃圾直接气化熔融焚烧技术,该技术的工艺流程为:交垃圾在温度1350-1500℃的熔融燃烧设备中进行熔融处理,原垃圾中的99.8%以上的二恶英可被分解掉。文章介绍新型城市生活垃圾气化熔融焚烧技术。 相似文献
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在一台自行研制的循环流化床气化炉上进行了模拟城市生活垃圾低温气化试验.结果表明,随气化温度升高,气化气体低位热值明显增高,可燃组分含量也随之增大,尤其是当气化温度从500℃升高到600℃时,气化气体中CO、H2和CH4含量显著增加;随着过量空气系数的增大,气化气体中可燃组分含量和气化气体低位热值均减小;垃圾中适当保持一定水分含量有利于提高其气化气体中可燃组分含苗和气化气体低位热值.同时采用ASPENPLUS软件建立了垃圾流化床气化模型,通过改变气化温度、过量空气系数和垃圾全水分含量进行模拟计算,结果显示,各工况下生成气化气体低位热值的模拟值和试验值符合较好,证明该模型可用于城市生活垃圾气化特性的预涮和分析. 相似文献
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城市生活垃圾气化产气特性实验研究 总被引:1,自引:0,他引:1
在氮气、空气和富氧三种气氛条件下对城市生活垃圾气化过程进行实验研究,考察了温度、升温速率及反应气氛对城市生活垃圾气化的影响。总结出了城市生活垃圾气化过程中产生的CO,H2,CH4,CO2四种主要气体产物的体积分数在250~950℃的变化规律。氮气气氛下,在250~500℃的低温区段,CO气体的体积分数随升温速率的升高而降低;在500~950℃的高温区段,CO气体的体积分数随升温速率的升高而增加。H2在500℃之后才开始产生,其体积分数在500~950℃随升温速率的升高而增加。CO,H2,CH4三种气体在各个温度点处的体积分数都随气氛中氧气体积分数的增加而降低,而CO2气体在各个温度点处的体积分数则随气氛中氧气体积分数的增加而升高。 相似文献
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无害化城市生活垃圾直接气化熔融焚烧技术的试验研究 总被引:5,自引:0,他引:5
通过试验研究,开发出了一种新型的无害化城市生活垃圾直接气化熔融焚烧技术,其工艺流程为:将配好料的生活垃圾直接置于温度为1300~1500℃,炉内气氛为还原性的气化熔融焚烧炉中进行处理,助燃粉煤由炉子底部喷人,可燃气体产物进入二次旋风燃烧室完全燃烧后进行余热发电或供热;熔融渣和金属或从一个渣口中排出并被水急速冷却,被冷却的熔融渣和金属经分选机分选出金属和无机残渣,金属回收利用,无机残渣则作为建材;或分别从金属口和熔融渣口排出,金属回收利用,熔融渣经水淬后再生利用。该炉的基建投资和运行费用比国外研制的垃圾直接气化熔融炉要低得多,一般只需国外的65%~85%。原垃圾中99.8%以上的二恶英可被分解,烟气中二恶英的排放量≤0.01 ng-FEQ/m3,熔融渣中二恶英的排放量≤0.003 ng-TEQ/g。 相似文献
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Buljit Buragohain Pinakeswar Mahanta Vijayanand S. Moholkar 《Renewable & Sustainable Energy Reviews》2010,14(1):73-92
This article attempts to highlight the technical and economical issues related to decentralized power generation in India using biomass gasification. Biomass-based energy has several distinct advantages such as wide availability and uniform distribution that puts it ahead among the renewable energy options for India. The estimated potential of power generation through renewable sources in India is 85 GW with biomass power contributing approximately 20 GW. Especially, in the remote areas and hilly terrains of India, biomass gasification-based power generation offers a highly viable solution for meeting energy demands of small villages and hamlets, which would not only make them independent but will also reduce burden on state electricity boards. This paper reviews various technical options for biomass gasification-based low-, medium- and large-scale power generation. We essentially discuss the merits and demerits (operational and other problems) of different systems. Further, we also deal with economics of these systems and discuss principal factors influencing the viability of the biomass-based power generation. Finally, we review some case studies of biomass-based power generation for meeting energy needs, both thermal and electrical. 相似文献
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A new pyrolysis technology and equipment for treatment of municipal household garbage and hospital waste 总被引:1,自引:0,他引:1
This paper analyzes various methods of disposal of municipal solid waste in China, including refuse incineration, garbage power and landfill technology. Based on the conventional pyrolysis principle, a new apparatus has been developed for waste disposal in China. It is especially useful in China as the waste is not sorted. The experiment shows that the concentration of dioxins meets the emission standard of 0.1 ng-TE/N m3 by controlling the residence time and temperature. The expulsive solid weight is as low as 5–7% of the whole refuse. At the same time, a great deal of fire gas was generated in the treatment process. 相似文献
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