共查询到20条相似文献,搜索用时 109 毫秒
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本简要介绍了广东省东莞糖厂135MW循环流化床锅炉本体、燃烧系统、石灰石系统、除灰渣系统等的主要设计特点和配置,结合工程的实际应用,归纳和总结了循环流化床的特点,供同类电厂设计参考。 相似文献
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该文基于目前主流基础平台型式,对不同基础平台、风机系统、系泊系统和电缆系统的技术特点进行了归纳和分析,总结了各子系统的主要技术特点以及设计思路,为将来的漂浮式风机设计提供参考。 相似文献
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汽轮发电机组空冷系统的选择及参数优化 总被引:1,自引:0,他引:1
对海勒、哈蒙和直接空冷三大空冷系统的特点进行了介绍、选择,提出了空冷机组设计背压的确定、设计气温的选择及常用的计算方法、初始温ITD的优化及空冷汽轮机组的设计和结构特点,指出了我国空冷机组的发展趋势和优化选用的空冷系统。 相似文献
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介绍了ASP技术、Web交互技术的特点,一个基于Web方式的科研项目费用管理信息系统的开发背景、系统目标、系统结构、主要设计思想和技术特色。阐述了科研项目费用管理系统的设计与实现。该系统可以较好地适应费用管理工作实时的特点,系统容量扩充方便,具有较高的可靠性和效率。 相似文献
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针对寒冷地区的气候特点及建筑负荷特点,采用太阳能集热系统和地源热泵空调系统相结合的形式,对某新建办公楼进行了空调工程具体设计。文中给出了该建筑的工程概况、方案对比、设备选型、地埋管设计计算、太阳能集热系统设计以及碳排放计算过程。为相关系统形式的设计和该气候区域的空调工程设计提供了参考,具有一定的工程应用价值。 相似文献
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详细介绍了75kW风力发电机组的基本性能、机械结构设计和特点、电控系统的软硬件设计和特点、安全保护措施。 相似文献
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阐述了发电厂计算机监控系统的设计方案及设计思想;介绍了监控系统的结构、功能及特点等,探讨了基于智能测控装置的全分布式开放系统设计和应用方面的问题。 相似文献
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Evaluation of retrofitting a conventional natural gas fired boiler into a condensing boiler 总被引:3,自引:0,他引:3
The exit flue gas temperature of a conventional gas fired boiler is usually high and a great amount of heat energy is lost to the environment. If both sensible heat and latent heat can be recovered by adding a condensing heat exchanger, the efficiency of the boiler can be increased by as much as 10%. In this paper, based on combustion and heat transfer calculations, the recoverable heat and the efficiency improvement potential of different heat recovery schemes at various exit flue gas temperatures are presented by performing design calculations. The payback period method has been used to analyze the feasibility of retrofitting a conventional gas fired boiler into a condensing boiler in a heating system in detail. The results show that the most economical exit flue gas temperature is 40–55 °C when a conventional natural gas fired boiler is retrofitted into a condensing boiler simply by adding a condensing heat exchanger. It is feasible to use the return water of a heating system as the cooling medium of the condensing heat exchanger because the return temperature varies with the ambient temperature and is lower than the dew point of the water vapor in the flue gas in most periods of a heating season in some regions, which has been verified by retrofitted case. 相似文献
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Waste heat recovery (WHR) is crucial to the efficiency improvement of natural gas‐fired boiler systems. Two‐stage WHR systems based on the natural gas‐fired boiler were analyzed from the viewpoints of thermal efficiency and heat transfer irreversibility. An overall entransy dissipation‐based thermal resistance was derived to evaluate the irreversibility of WHR, including the entransy dissipations during condensation and in absorption heat pump (AHP). Compared with the basic WHR system, the two‐stage WHR systems have higher boiler efficiency and less irreversibility. The air‐humidified system recycles both the heat and vapor in flue gas, while the unutilized latent heat in the recovered vapor causes the boiler to be less efficient than the AHP system. Investigation on heat exchanger effectiveness of two‐stage WHR systems illustrated: in the two‐stage WHR system with air humidification, the increasing effectiveness of both heat exchangers could effectively increase boiler efficiency and reduce heat transfer irreversibility. In the two‐stage WHR system with AHP, boiler efficiency has a local optimum when the dew point occurs near the outlet of the first heat exchanger; increasing the second heat exchanger effectiveness is more efficient in improving boiler efficiency. The present work may provide available references and guidance for the design and optimization of the two‐stage WHR systems. 相似文献
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卧式内燃三回程锅炉是一种常见的锅壳式燃油燃气锅炉,在近几年的锅炉运行统计中,发现了回燃室管板过热裂纹、管端裂纹等容易出现的问题,通过调查研究探讨了几种改进的方式,希望对卧式内燃三回程锅炉的设计生产有一定的参考作用. 相似文献
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阐述了小型锅炉由原来烧煤改造成烧天然气的具体措施,为燃煤改为烧天然 气炉提供了一些宝贵的经验。 相似文献
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