共查询到20条相似文献,搜索用时 234 毫秒
1.
为进一步提高分布式能源余热锅炉省煤器受热面的吸热能力,在目前管外均采用螺旋开齿翅片管的情况下,分析省煤器受热面内部流程对优化传热性能的影响。依托某LM6000燃机余热锅炉项目,对单管屏省煤器的单流程、双流程及三流程型式进行分析对比,计算了管内流程变化引起的流速变化对高压和低压省煤器受热面积及传热性能的影响。同时,在供热机组低压省煤器一体化设计时,计算出低压省煤器在不同流量情况下,单管屏的三种流程型式汽水流通阻力的详细数据和变化趋势。得出了单管屏不同流程型式在分布式能源余热锅炉计算数据,为该结构的省煤器设计优化提供参考依据。 相似文献
2.
为实现对燃煤锅炉无烟温测点的对流受热面积灰程度的监测,对锅炉对流受热面的传热特性及工质吸热特性进行热平衡机理分析,在热力学基础上,用相关性分析、回归分析和灰色关联分析方法对实际生产数据进行挖掘、分析,计算了对流受热面的出入口工质温差与清洁因子的灰色关联特性,建立了利用受热面进出口温差表征积灰程度的函数模型。结果表明:负荷稳定时,锅炉燃烧释放的热量也是一定的,对流受热面单位工质吸热量能反映该对流受热面的积灰程度;受热面温差与清洁因子具有极强的关联性,受热面进出口工质温差模型能很好地反映对流受热面的积灰程度。 相似文献
3.
4.
5.
6.
7.
8.
文章主要探讨了小型流化床锅炉的受热面(包括埋管、对流管、水冷壁管、过热器管、省煤器管)磨损的原因,磨损的机理,分析了控制和影响磨损的因素,受热面磨损的位置,以及如何从设计安装、运行维护、检修全过程进行防止和减轻锅炉受热面的磨损.同时,具体介绍了防磨技术措施在小型循环流化床锅炉上的应用. 相似文献
9.
10.
11.
在分析余热锅炉受热面传热特点的基础上,指出螺旋翅片管束在余热锅炉中应用的重要性。根据螺旋翅片管束的特点及其在常规电站锅炉中的应用情况,指出了螺旋翅片管束在余热锅炉中应用需解决的问题。 相似文献
12.
13.
针对船用锅炉的特点,论述了炉膛高温辐射传热的有效性,在一定条件下,船用锅炉炉膛的尺寸有所增加,而受热面的重量反而可以减少。 相似文献
14.
J.F. Lu J.S. Zhang G.X. Yue Q. Liu L. Yu X.D. Lin W.J. Li Y. Tang T.Y. Luo R.S. Ge 《亚洲传热研究》2002,31(7):540-550
Knowledge of heat transfer coefficients is important in the design and operation of CFB boilers. It is the key to determining the area and the layout of the heat transfer surfaces in a CFB furnace. Local bulk density has a close relationship to the local heat transfer coefficient. Using a heat flux probe and bulk density sampling probe, the local bed to wall heat transfer coefficient in the furnace of a 75 t/h CFB boiler was measured. According to the experimental results and theoretical analysis of the facts that influence the heat transfer, the heat transfer coefficient calculation method for the CFB furnace was developed. The heat transfer surface configuration, heating condition, and the material density are considered in this method. The calculation method has been used in the design of CFB boilers with a capacity from 130 t/h to 420 t/h. © 2002 Wiley Periodicals, Inc. Heat Trans Asian Res, 31(7): 540–550, 2002; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/htj.10056 相似文献
15.
16.
17.
18.
19.
A study of the heat transfer about the heating surface of three commercial 300 MWe CFB boilers was conducted in this work. The heat transfer coefficients of the platen heating surface, the external heat exchanger (EHE) and cyclone separator were calculated according to the relative operation data at different boiler loads. Moreover, the heat transfer coefficient of the waterwall was calculated by heat balance of the hot circuit of the CFB boiler. With the boiler capacity increasing, the heat transfer coefficients of these heating surface increases, and the heat transfer coefficient of the water wall is higher than that of the platen heating surface. The heat transfer coefficient of the EHE is the highest in high boiler load, the heat transfer coefficient of the cyclone separator is the lowest. Because the fired coal is different from the design coal in No.1 boiler, the ash content of the fired coal is much lower than that of the design coal. The heat transfer coefficients which calculated with the operation data are lower than the previous design value and that is the reason why the bed temperature is rather high during the boiler operation in No.1 boiler. 相似文献