共查询到18条相似文献,搜索用时 125 毫秒
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生物质型煤技术是提高煤和生物质资源利用的技术之一。该技术不仅能实现煤炭的高效清洁利用,还可以实现生物质废弃物的资源化和能源化利用。本文以生物质型煤作为研究对象,选择不同生物质添加剂、成型温度、成型压力、煤与生物质配比等作为变量,以落下强度和发热量为指标,探究了不同成型条件对成型效果的影响。结果表明成型压力的增大使得生物质型煤的落下强度增强,成型温度的升高和生物质添加量的增大有利于生物质型煤机械强度增加,但过高的成型温度和过多的生物质添加量反而会使落下强度降低;成型温度的升高有利于发热量的提升,但型煤中生物质添加量的增大会使发热量降低,成型压力对发热量的影响程度较小。 相似文献
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介绍了运用湿料低压成型工艺制备生物质型煤的工艺流程及研究过程,生产中研发了具有免烘干、防水、固硫三重功效的TX添加剂;阐述了层燃锅炉对煤质的要求、生物质型煤的配制及在锅炉上的运行操作情况;测试结果表明,湿料低压成型技术投资少、生产成本低,所制型煤燃烧效率高、环保效果好。 相似文献
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生物质型煤是将煤炭与农林废弃物等可燃生物质及添加剂按一定比例混合压制而成的一种固体成型燃料,是煤炭资源的一种洁净利用方式。生物质型煤技术将中国有限的煤炭资源和农村大量的可再生秸秆林木废弃物结合起来,不仅可以实现煤炭尤其是低阶煤的高效清洁利用,而且可以实现农林废弃生物质的资源化和能源化利用。从发展生质型煤的意义、生物质型煤成型的工艺、黏结剂的选用、燃烧机理以及燃烧特性作了综合叙述,并对生物质型煤发展前景进行了展望。发展生物质型煤,对减小大气污染、改善生活环境、缓解国家能源安全危机和实现中国化石能源与可再生能源的合理利用具有重要的战略意义。 相似文献
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生物质固体成型燃料研究现状及发展前景 总被引:2,自引:0,他引:2
概述了国内外生物质固体成型燃料技术及设备的研究现状。讨论了生物质固体成型燃料的成型机理和影响因素,主要概括了几种成型工艺及设备的优缺点。最后指出我国生物质固体成型燃料存在的问题和今后的发展趋势。 相似文献
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在宝钢三期型煤工艺的设计中,根据一期型煤工艺的设计原理及生产实践,取消成品冷却系统,采用了卧式混捏机,将混合与混捏合二为一,使三期的型煤工艺流程大为简化,取得了可观的经济效益。文中对影响型煤发展、降低优质炼焦煤的配入等问题进行了分析与思考。 相似文献
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选定STD+I煤调湿工艺与住友成型煤工艺,通过项目投资、工程占地、运行成本、节能效果、增产效益等多方面比较,表明煤调湿工艺更节能,生产运行成本更低。 相似文献
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Attempts to produce high-grade fuel from biomass and low rank coal are important from the viewpoint of renewable energy and the utilization of unused resources. In this paper, the authors reported on the hydrothermal treatment of biomass and low rank coal at 300 °C using a bench scale continuous apparatus and a batch autoclave. The results show that coalification takes place during the hydrothermal treatment of both the low rank coal and biomass, and the upgraded solid products show similar chemical compositions, gross calorific value and effective calorific value, independent of the mixing ratio. The solid product also becomes hydrophobic and unable to re-adsorb the lost moisture. The characteristics of the solid produced by the bench scale continuous apparatus can be predicted by the results of the batch process. Thermogravimetric analysis shows that the solid product has a wide-range of molecular weight but the thermally stable heavy molecules are found more in the treated coal as opposite to the thermally unstable light molecules, more of which are found in the treated biomass. This may correlate with that the solid product of higher biomass mixing ratio has a higher volatile matter content. Polymerization is synergistically promoted during mixed hydrothermal treatment of low rank coal and biomass. 相似文献
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Benefaction from coal fines as solid fuel in Turkey is very much important for economical development. Beneficiation from washed coal fines in the industry using solid fuel at lump size and in the municipal areas as an household solid fuel may be only provided by hot briquetting of the coal fines. The most practical common way of that benefication from coal fines in our country have been hot binding by sulfite liquor–sulfite liquor-melas and lime mixtures. Harmful the flue content of sulfite liquor-melas may only be eliminated by lime, a type of solid additive. However, cold bonded briquettes produced from coal fines are environmentally free. Just ash contents of these briquettes increase at a certain degree and heat content of them decrease at a certain extent. By using magnesia binder showed in this study, Tunçbilek lignite fines have been briquetted by cold and hot briquetting techniques. The qualities of briquettes produced by cold binders were compared with to those produced by other hot binding methods As a result, magnesia binder showed the similar characteristics with those of the briquettes produced by only cold bonded gypsum. Use of magnesite mixture and gypsum just as only cold binder was not suitable for the requirements from the coal briquettes to be used as solid fuels, particularly from household fuels, but just only as cold additive should be used. 相似文献