共查询到19条相似文献,搜索用时 78 毫秒
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广西低质烟煤锅炉改烧褐煤的理论与实践 总被引:1,自引:0,他引:1
分析了广西低质烟煤锅炉改烧褐煤可能遇到的炉膛结焦,过热汽温偏低,省烟器磨损等技术问题,提出了解决的办法,南宁电厂锅炉改烧右江褐煤后,锅炉效率提高了5.43个百分点;SO2排放量降低68.72%,做到了达标排放。 相似文献
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掺烧褐煤对350MW机组烟煤锅炉经济性影响研究 总被引:1,自引:0,他引:1
随着煤炭供应资源的紧张,为降低发电成本,华能丹东电厂2×350 Mw机组烟煤锅炉开始掺烧褐煤.经过一段时间混配、掺烧,针对锅炉实际运行中出现的经济性下降采取了一系列燃烧调整措施,确保锅炉安全、稳定、经济运行.经过现场燃烧调整试验,取得了经济性数据,通过经济性对比分析,提出了燃用烟煤锅炉掺烧褐煤的经济运行方式. 相似文献
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以某350MW机组燃用烟煤的锅炉为研究对象,采用输煤皮带预混的方式进行了不同比例的褐煤掺烧试验,分析了不同比例褐煤掺烧工况下制粉系统和燃烧系统运行的安全性、经济性和环保特性.结果表明:(1)掺烧扎煤后制粉系统所需的干燥出力大幅增加,单台炉掺烧比例最高不应超过50%;(2)随着扎煤掺烧比例的增大,再热汽温上升趋势较为明显,锅炉排烟温度、灰渣可燃物含量上升,锅炉效率降低,当掺烧扎煤比例达3/8时,锅炉效率降低约1.2百分点;(3)随着扎煤掺烧比例的增加NOx排放浓度不断降低,当掺烧扎煤比例达3/8时,NOx排放浓度降低约24.7%;(4)当扎煤与大友煤掺烧时,掺烧比例低于3/8不会加剧锅炉燃烧器区域以及高温对流受热面区域的结焦问题. 相似文献
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针对长山热电厂烟煤供应的紧张局面,提出在燃用烟煤的HG-410/100-6型锅炉试掺烧部分褐煤.在进行单斗全褐煤的掺烧试验期间,曾经发生原煤斗棚煤和制粉系统启动过程中爆燃的不安全事故,通过对事故原因进行分析,采取了有效的防止措施,获得了较好的掺烧效果,降低了发电成本,取得了较大的经济效益. 相似文献
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通过330MW火电机组贫煤锅炉改烧烟煤实践,分析存在的问题,探讨双进双出制粉系统贫煤锅炉改烧烟煤的方法。在不进行设备改造前提下,改烧烟煤后,锅炉运行稳定性增强,机组耗油大幅降低,NOx排放指标降幅明显,喷氨量降幅30%,效果良好,为同类型锅炉拓宽燃煤结构,提高运行安全经济性提供借鉴。 相似文献
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《电气》2011,(5):27-30
The special design for the furnace and burner of boilers burning lignite is analyzed and the type selection of the pulverizing system is discussed by taking account of the lignite’s characteristics of high moisture, low heating value and low ash fusion temperature. The impact of such characteristics on the type selection of burning equipment and pulverizing systems for the lignite boiler is studied. The value ranges of the furnace characteristic parameters for the lignite boiler are recommended. For the old lignite, the premix period in the burner should not be too long in order to avoid slagging and the velocity of the primary air is suggested to be between 17 m/s and 22 m/s. The direct-flow burner with tangential firing is preferred for lignite with the moisture higher than 35%. The medium-speed mill is better to be used for lignite with the moisture less than 35%, while for lignite with the moisture higher than 40% the fan mill should be the first choice. 相似文献
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针对目前火电厂燃料品质大多长期偏离设计煤种的状况,结合某电厂实际研究了火电厂掺烧劣质煤后锅炉运行存在的问题,并从配煤、辅机设备改造和锅炉运行维护优化等方面提出了措施,以提高锅炉运行的可靠性。 相似文献
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对供热锅炉直接燃烧天然气的情况进行了讨论。通过分析其效率,指出这种用能方式没有充分合理地利用天然气,提出了热能梯级利用的参考建议。 相似文献
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《电气》2012,(4):25-30
In China,the abrasion index and the free moisture are regarded as the criteria for determining whether the medium-speed pulverizer or the fan pulverizer could be selected.Based on comprehensive studies on foreign methods for choosing the pulverizing system for lignite boilers,it is suggested that the particle size of coal,the drying time,the drying temperature and the humidity should be taken into account when measuring the free moisture of lignite,and the total moisture could also be the principle for type selection of pulverizer for lignite boilers.Furthermore,the determination of pulverized-coal moisture has great influence on the running of pulverizing systems.The actual moisture of certain pulverized coals is compared with that calculated with different methods and a feasible method for determining the moisture of the pulverized coal is suggested. 相似文献