共查询到19条相似文献,搜索用时 581 毫秒
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钢构架是锅炉的承力部件,它支撑锅炉本体的重量,并抵御地震、风及炉膛额定爆炸力等荷载。就金属耗量而言,一台300MW锅炉重量在7 000多吨,构架重量约占总重的1/3,所以钢构架是锅炉产品制造的重要组成部分。本文从高强度螺栓结构钢构架的结构特点入手,系统地介绍了独特的制造工艺。 相似文献
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锅炉安装工作是很重要的一个环节。对组装、散装出厂的锅炉在使用单位的现场进行装配,其实质是制造的继续,是制造厂的总装阶段。安装质量的好坏,直接关系到锅炉能否正常地运行,而把好安装质量关,是安装单位与使用单位的工程技术人员义不容辞的责任。 相似文献
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叙述了河津发电厂1号、2号机组锅炉再热器的结构、布置特点、锅炉燃烧调整特性以及锅炉在低负荷工况运行时,再热汽温偏低的原因,提出,锅炉在低负荷工况下调整再热汽温的措施和方法。 相似文献
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SG-475/13.9-M567型CFB锅炉运行特性分析 总被引:1,自引:0,他引:1
CFB锅炉的燃烧是个多种因素影响的复杂过程,通过在SG-475/13.9-M567型CFB锅炉上分别以3种煤种进行不同负荷变工况的锅炉热效率试验,总结得出负荷、煤质是影响循环流化床锅炉热效率的主要因素,同时过量空气系数、一次风率、床压、床温等运行参数对CFB锅炉热效率在一定范围内具有可调性,可据此指导的负荷分配以及CFB锅炉的燃煤调配、燃烧调整,以期获得良好的经济性,并为其他CFB锅炉运行提供借鉴。 相似文献
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Da Young LEE Byeong Mo SEO Yeo Beom YOON Sung Hyup HONG Jong Min CHOI Kwang Ho LEE 《Frontiers in Energy》2019,13(2):339
Commercial buildings account for significant portions of the total building energy in South Korea and thus a variety of research on the boiler operation related to heating energy in office buildings has been carried out thus far. However, most of the researches have been conducted on the boiler itself, i.e., the part load ratio characteristics and the corresponding gas energy consumption patterns are not analyzed in the existing studies. In this study, the part load ratio and the operating characteristics of gas boiler have been analyzed within an office building equipped with the conventional variable air volume system. In addition, the gas consumption among different boiler staging schemes has been comparatively analyzed. As a result, significant portions of total operating hours, heating load and energy consumption has been found to be in a part load ratio range of 0 through 40% and thus energy consumption is significantly affected by boiler efficiency at low part load conditions. This suggests that boiler operation at the part load is an important factor in commercial buildings. In addition, utilizing sequential boiler staging scheme can save a gas usage of about 7%. For annual heating energy saving, applying the sequential control boiler with a 3:7 proportion staging is considered to be the optimal control algorithm for maximum efficiency of boilers. 相似文献
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Haoshu SHEN Yuxin WU Minmin ZHOU Hai ZHANG Guangxi YUE Junfu LYU 《Frontiers in Energy》2021,15(1):124
Large eddy simulation (LES) has become a promising tool for pulverized coal combustion with the development of computational fluid dynamics (CFD) technologies in recent years. LES can better capture the unsteady features and turbulent structures of coal jet flame than Reynolds averaged Navier Stokes (RANS). The coal-fired power plants in China are now required to be operated in a wide load range and quickly respond to the electric grid. The boiler performance of variable loads should be evaluated in terms of flow, heat transfer, and combustion processes. In this paper, LES was applied to simulate a 660 MW ultra-supercritical boiler under BMCR (boiler maximum continue rate), 75%THA-100, and 50%THA-100 conditions. The predicted gas velocities agree well with the thermal calculation and the temperature error is less than 130 K. The simulation results show that the operation load has significant effects on the boiler performance. It is also proved that LES can provide guidance for the design and operation of advanced coal-fired boilers. 相似文献
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鉴于对炼钢转炉锅炉研究的重要意义,设计了一套简单、可靠的试验系统,对炼钢转炉余热锅炉周期性的不稳定传热过程进行试验模拟。对其在冲击热负荷下垂直自然循环的传热特性进行了深入的试验研究,得到其传热特性的一般变化规律,并分析了冲击热负荷和工质欠焓对其传热特性的影响,通过回归试验数据得到传热系数的准则关系式。对改善炼钢转炉余热锅炉的传热特性和水循环安全性提出了建议。 相似文献
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为提高某电厂220t/h煤粉锅炉燃烧器低负荷稳燃能力,拟采用浓淡燃烧技术对该炉燃烧器进行改造;下层燃烧器采用水平浓淡燃烧器,上层燃烧器采用上下浓淡燃烧器;为保证低负荷时的主蒸汽温度,上层燃烧器为摆动式燃烧器。 相似文献