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首先分析了火焰图象处理中单色性选择的意义,然后重点介绍了在200 MW电站锅炉上实现的 炉膛燃烧二维温度分布检测的试验研究。结果显示,即使炉内燃烧工况比较平稳,燃烧温度 的波动幅度也达到180 K;燃烧温度随燃料调节呈现相应变化;过热器壁温及烟气含氧量也 与燃烧温度明显关联。最后简要介绍了在此基础上构成的一种炉膛燃烧三维温度分布检测方 法,以及将反映炉膛辐射能量的图象灰度作为中间被调量构成的一种新型燃料控制方式,展 望了这几种新方法在电站锅炉上的广阔的应用前景。 相似文献
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望亭发电厂^#11锅炉制粉系统改善煤粉分配均匀性措施后,取得了很好的效果,四角各层煤粉管内风量和粉量的最大偏差分别不超过±10%,为改善炉膛出口两侧烟气偏差和实现低NOx燃烧以及锅炉低负荷稳燃创造了良好的条件。目前,高温再热器前两侧烟温的偏差基本控制在15℃之内运行,至今未发生煤粉管堵塞、受热面超温爆管和其他不良现象,飞灰含碳量逐年好转。 相似文献
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从锅炉运行实际情况及设备结构上分析了陡河发电厂850t/h炉金属管壁超温的原因,提出了运行操作上应采取的控制措施。指出控制炉膛出口烟温、努力消除炉内热偏差是控制锅炉金属管壁超温的关键。 相似文献
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在切向燃烧系统中,通过改变燃烧器喷口的角度可以调节炉内火焰中心位置,可达到调节再热汽温的目的.采用摆动式燃烧器也是平稳调整炉膛出口烟温的重要措施.阐明了恢复摆动燃烧器的意义、影响因素及改造情况并初步分析了节能效益,探讨了锅炉投用再热器减温水时机组效率的影响等有关问题.了解并掌握摆动燃烧器的调温特性,对锅炉安全、经济稳定运行有重要作用. 相似文献
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成焕熊天洪尹力许雄孙远超 《云南水力发电》2022,(7):206-209
火电厂火焰工业电视是监视锅炉炉膛内火焰的真实图像的装置,火焰工业电视的监视效果,直接影响运行人员对炉膛内燃烧工况的判断,是锅炉安全运行不可缺少的装置。镇雄电厂锅炉火焰工业电视采用的是仪用压缩空气冷却的内窥式镜头,在锅炉37m的左侧和右侧炉壁上插入炉膛内监视炉膛燃烧工况。以镇雄电厂2台600MW超临界W型火焰锅炉工业电视为研究对象,对监视效果差问题探索,总结了有效的维护经验并提出了对火电厂火焰工业电视的调试技术经验。 相似文献
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针对某电厂660MW机组W形火焰锅炉燃用煤种与设计煤质偏差较大、锅炉效率偏低的问题进行了燃烧优化调整试验。首先通过调整F挡板对省煤器出口氧量分布进行调平,然后从影响锅炉运行经济性的主要因素入手,结合该锅炉的特点,分析了负荷变化、二次风变化、煤质变化和C挡板开度等参数对锅炉效率的影响,指出了合理的运行工况。 相似文献
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A. N. Alekhnovich N. V. Artem’eva V. V. Bogomolov 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2007,41(2):105-110
The paper is devoted to substantiation and prediction of the allowable gas temperature at the outlet from a furnace subject
to slagging. The non-optimality of values recommended by effective methodical instructions regarding the design of furnace
devices is demonstrated. Utilizing knowledge gained from temperature measurements in boilers, and the situation regarding
the slagging of heating surfaces located at the outlet from the furnace, new, frequently higher values are proposed. A method
for evaluating the allowable gas temperature at the outlet froma furnace subject to slagging is suggested on the basis of
data regarding the chemical composition of the mineral portion of coals.
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Translated from élektricheskie Stantsii, No. 2, February, 2007, pp. 23–28. 相似文献
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670MW超临界直流锅炉炉顶采用二次密封形式,护板为耐热、耐腐蚀、延展性好的材料,但由于炉顶棚面积过大,各处膨胀复杂,机组投运后护板容易拉裂,加之护板下部耐火可塑料、耐火浇注料受热松散,造成烟气泄漏。为了解决锅炉炉顶受热膨胀造成的漏烟、漏灰问题,提高锅炉效率,在原有二次密封基础上,采用环保非金属立体柔性密封技术,对锅炉炉顶密封进行改造修复。机组投运后,效果良好,解决了锅炉受热膨胀造成的漏烟、漏灰问题,提高了锅炉效率,改善了生产环境。 相似文献
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A. V. Kurochkin A. L. Kovalenko V. G. Kozlov A. I. Krivobok 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2007,41(1):50-56
Special features of operation of a boiler operating as a combined-cycle plant and having its own furnace and burner unit are
descried. The flow of flue gases on the boiler is increased due to feeding of exhaust gases of the GTU into the furnace, which
intensifies the convective heat exchange. In addition, it is not necessary to preheat air in the convective heating surfaces
(the boiler has no air preheater). The convective heating surfaces of the boiler are used for heating the feed water, thus
replacing the regeneration extractions of the steam turbine (HPP are absent in the circuit) and partially replacing the preheating
of condensate (the LPP in the circuit of the unit are combined with preheaters of delivery water). Regeneration of the steam
turbine is primarily used for the district cogeneration heating purposes. The furnace and burner unit of the exhaust-heat
boiler (which is a new engineering solution for the given project) ensures utilization of not only the heat of the exhaust
gases of the GTU but also of their excess volume, because the latter contains up to 15% oxygen that oxidizes the combustion
process in the boiler. Thus, the gas temperature at the inlet to the boiler amounts to 580°C at an excess air factor α = 3.50;
at the outlet these parameters are utilized to T
out = 139°C and αout = 1.17. The proportions of the GTU/boiler loads that can actually be organized at the generating unit (and have been checked
by testing) are presented and the proportions of loads recommended for the most efficient operation of the boiler are determined.
The performance characteristics of the boiler are presented for various proportions of GTU/boiler loads. The operating conditions
of the superheater and of the convective trailing heating surfaces are presented as well as the ecological parameters of the
generating unit.
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Translated from élektricheskie Stantsii, No. 12, December 2006, pp. 26–32. 相似文献
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介绍了江苏华电扬州发电有限公司在运行中相继出现了烟气脱硫系统阻力增大而影响系统性能稳定运行的问题。分析了烟气脱硫系统阻力增大对运行影响的原因,采取了相应措施后,烟气阻力减小,能耗降低。 相似文献
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湿法烟气脱硫系统设计节能分析 总被引:1,自引:0,他引:1
从吸收塔烟气流速、改善吸收塔周边区域烟气和浆液的分布等方面探讨了吸收塔设计优化对湿法烟气脱硫系统能耗的影响。分析了不同规格的石灰石粒径与湿法烟气脱硫系统能耗的关系,并以600MW机组为例对上述因素进行了技术经济比较。 相似文献
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排烟冷却塔的一维设计计算方法 总被引:2,自引:0,他引:2
利用冷却塔排放烟气,须在冷却塔内增加排烟管道,且在填料断面又增加了烟气流量.冷却塔工艺设计如何进行计算,是冷却塔设计遇到的一个新问题.本文在分析了排烟塔气流特性的基础上,参照类似气流阻力的研究结果结合自然塔的热力计算方法,给出了排烟冷却塔的热力阻力一维计算方法,计算与分析结果表明,计算具有一定的精度,可供设计参考. 相似文献
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Yu. P. Enyakin N. A. Zroichikov B. N. Glusker I. V. Galas Yu. M. Tsypkin V. Z. Zaretskii B. P. Enyakin B. N. Nosov V. V. Chuprov S. N. Anichkov V. A. Vereshchatin 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2002,36(1):1-6
Results of complex tests of the TGMP-314 boiler of thermal power plant-23 of the Mosénergo Company operating on natural gas and furnace oil after design improvement are presented. Toxic emissions of nitrogen oxides were diminished by the use of low-toxicity burners, supply of air to secondary blow nozzles, and introduction of recirculating gases into the burner channels. These measures lowered the emissions of NOx, benz(a)pyrene, and other harmful substances into the atmosphere below the standardized values. The boiler proved to operate reliably in the entire range of tested loads in the gas- and oil-fired modes with stage firing and recirculation of flue gases. The rated parameters of live steam and reheat steam were steadily maintained. 相似文献
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熊华涛 《水利与建筑工程学报》2021,(2):113-119
通风是防治隧道瓦斯浓度超限及爆炸事故的关键措施。以石黔高速公路七曜山隧道为背景,阐述双洞高瓦斯隧道射流巷道式通风方案的设计方法,基于FLUENT软件研究隧道内部风速与瓦斯浓度的分布规律。研究结果表明:内燃机械尾气为七曜山隧道需风量的主控因素,排风洞风筒在横通道弯折处的阻力达到总阻力的21.7%,应注意保持风筒圆顺度;同一断面不同位置风速各不相同,远离风筒的拱顶与拱壁相交处、横通道与正洞连接处等位置积聚;隧道纵向瓦斯浓度在风筒出口附近呈两端高、中间低的分布特征,建议施工人员尽量在风筒出口的后方附近驻足。 相似文献
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