共查询到19条相似文献,搜索用时 156 毫秒
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生物质颗粒燃料取代常规煤燃料对节约常规能源、优化我国能源结构、减轻环境污染具有积极的意义。生物质颗粒燃料与常规煤燃料的特性有较大的区别。当将燃煤锅炉改造为燃生物质颗粒燃料锅炉时应采取相应的改造措施。以本公司锅炉为实例对燃煤链条锅炉的炉膛和燃烧系统进行了改造,通过对炉拱、炉排、风室、卫燃带、上料系统、燃烧控制系统进行改造实现了锅炉与生物质颗粒燃料燃烧的良好匹配。能效和环保测试结果表明,锅炉改燃生物质颗粒燃料后热效率提高,污染物排放符合标准要求。 相似文献
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本文从锅炉吹扫、燃烧控制系统、炉膛压力控制和全炉膛灭火保护四个方面,简要叙述了锅炉炉膛防爆的控制策略。 相似文献
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通过对褐煤在往复炉排上燃烧特性的分析,有针对性地进行炉排选型、炉膛及炉拱设计、一次风机与二次风机的选取、运行操作,能够实现褐煤在往复炉排上的高效燃烧。 相似文献
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SHS20—2.45/400型锅炉是我厂的主要生产用炉,其辐射受热面积103m~2,对流受热面积315m~2,炉膛点燃室容积为89.64m~2炉,排面积为15m~2,省煤器受热面312m~2,空气预热器为457m~2。从这些受热面积来看,该炉具有一定的潜力,即辐射受热面及对流受热面的面积比较大,在特定的工况下,可以达到24~25t/h的蒸发量。但也有如下一些缺点:①点燃室太大,点燃困难,炉温不易保证;②炉排面积太大,冷风(一次风)太多,燃料着火困难;③水冷壁布置太低,影响点燃温度;④二次风位置不当,影响蔗渣燃烧;⑤炉门、灰门较多,漏风增加,影响炉温。 该炉设计燃料为甘蔗渣、无烟煤或贫煤。我厂近年来以燃用甘蔗渣为主,燃煤为辅。该炉在运行时,蒸发量较低,只有11~13t/h,蔗渣着火难,燃烧恶化,前拱区蔗渣堆积燃烧,后拱区无蔗渣燃烧,操作困难,易打“火炮”为了改善燃烧和增加蒸发量,我们对炉膛作了一些改造。 1 点燃室容积及炉排面积的估算 相似文献
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通过对褐煤在往复炉排上燃烧特性的分析,有针对性地进行炉排选型、炉膛及炉拱设计、一次风机与二次风机的选取、运行操作,能够实现褐煤在往复炉排上的高效燃烧。文中还对燃褐煤往复炉排锅炉的运行经济性进行了分析。 相似文献
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农作物废弃物是江苏省最主要的生物质资源,利用其进行发电可以有效地解决能源紧张以及在秸秆就地焚烧引发的一系列问题.江苏省生物质发电技术发展较早,其中混燃与气化技术是两种具有代表性的发电模式.目前,国内外通常对这些技术的进行单独研究,但是还没有针对两种技术路线的综合比较与分析的系统研究.通过对现有的混燃和气化发电案例进行充分调研,从燃料、进料系统、发电技术、经济性、污染物减排及面临的主要问题等方面,对两种模式的优缺点进行综合比较与分析.并在此基础上,探讨了这两种模式的合理发展路线. 相似文献
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介绍了生物质颗粒燃料的燃烧特性,针对燃用生物质颗粒燃料的蒸汽锅炉结构设计的要求,提出了增大锅炉炉膛结构,改善一二次进风的配比,采用二次进风热能回收和PLC自动控制等方面的改进措施。 相似文献
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As a renewable and environmentally friendly energy source, biomass (i.e., any organic non-fossil fuel) and its utilization are gaining an increasingly important role worldwide. Grate-firing is one of the main competing technologies in biomass combustion for heat and power production, because it can fire a wide range of fuels of varying moisture content, and requires less fuel preparation and handling. The basic objective of this paper is to review the state-of-the-art knowledge on grate-fired boilers burning biomass: the key elements in the firing system and the development, the important combustion mechanism, the recent breakthrough in the technology, the most pressing issues, the current research and development activities, and the critical future problems to be resolved. The grate assembly (the most characteristic element in grate-fired boilers), the key combustion mechanism in the fuel bed on the grate, and the advanced secondary air supply (a real breakthrough in this technology) are highlighted for grate-firing systems. Amongst all the issues or problems associated with grate-fired boilers burning biomass, primary pollutant formation and control, deposition formation and corrosion, modelling and computational fluid dynamics (CFD) simulations are discussed in detail. The literature survey and discussions are primarily pertaining to grate-fired boilers burning biomass, though these issues are more or less general. Other technologies (e.g., fluidized bed combustion or suspension combustion) are also mentioned or discussed, to some extent, mainly for comparison and to better illustrate the special characteristics of grate-firing of biomass. Based on these, some critical problems, which may not be sufficiently resolved by the existing efforts and have to be addressed by future research and development, are outlined. 相似文献
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结合具体实例,分析了江苏油田的两台锅炉在由燃煤改造为油气混烧后,在实际运行中存在的具体问题。在此基础上提出了整改方案.经过实施后证明效果显著,值得借鉴。 相似文献
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Forestation and landfilling purpose-grown biomass are not adequate offsets for the CO2 emission from burning fossil fuels. Their permanence is insufficiently guaranteed and landfilling purpose-grown biomass may even be counterproductive. As to permanence, bio-char may do better than forests or landfilled biomass, but there are major uncertainties about net greenhouse gas emissions linked to the bio-char life cycle, which necessitate suspension of judgement about the adequacy of bio-char addition to soils as an offset for CO2 emissions from burning fossil fuels. 相似文献