采用低倍率飞灰循环底饲回燃技术改造燃用无烟煤流化床锅炉

详述了在福建地区首次采用低倍率飞灰循环底饲回燃技术改造一台１０ｔ／ｈ鼓泡流化床锅炉的情况。对燃用福建地区低挥发份无烟煤流化床锅炉的设计和改造具有参考价值。     

CG-35/5.30-MX锅炉改造及运行情况

介绍我厂两台CG－35／5．30－MX循环流化床锅炉,由于设计、选型等原因,致使锅炉出力低、能耗高、受热面磨损快、运行可靠性差,经过一年多时间不断调试、改造,认真分析原因后决定将循环流化床锅炉造成低烟速、加理管的低倍率CG－35／5．30－MXD鼓泡型循环锅炉,并介绍改造后运行情况。     

复合床式低倍率循环流化床锅炉的研制开发

本文全面分析了较高循环倍率循环流化床锅炉所存在的技术问题,提出采用设计经验成熟、运行稳定可靠、热效率高、电耗低的低循环倍率循环流化床锅炉技术来实现循环流化床锅炉的大型化的新技术思想,并据此研制开发出复合床式低倍率循环流化床锅炉新技术。通过介绍和分析复合床式低倍率循环流化床锅炉的技术原理及技术特点,展示新炉型所具有的锅炉主要部件的灵活布置方式,为循环流化床锅炉的大型化指出了新的发展方向。     

循环流化床锅炉燃用无烟煤的运行分析

通过对循环流化床锅炉设计和运行时床温、给煤点位置、分离器形式、循环倍率及返料器等关键问题的分析，介绍了循环流化床锅炉如何调整才能适应无烟煤的燃烧。     

循环流化床锅炉燃烧粗颗粒无烟煤的工业试验

作者在一台蒸发量 2 0吨 /时的低倍率循环流化床锅炉上进行了燃烧三种不同粒度分布的福建Ⅱ类无烟煤的工业实验 ,得到给煤颗粒平均粒径与悬浮段颗粒浓度、飞灰含炭量、炉膛各段温度 ,以及悬浮段颗粒浓度与温度等关系曲线。热态实验表明 :低倍率循环流化床锅炉更适合燃烧粗颗粒的福建省无烟煤 ,它不仅解决因飞灰量过大造成的环境污染问题 ,而且还提高了锅炉的热效率。     

循环流化床锅炉燃烧粗颗粒无烟煤的工业试验

作者在一台蒸发量２０吨／时的低倍率循环流化床锅炉上进行了燃烧三种不同粒度分布的福建Ⅱ类无烟煤的工业实验,得到给煤颗粒平均粒径与悬浮段颗粒浓度、飞灰含碳量、炉膛各段温度、以及悬浮段颗粒浓度与温度等关系曲线,热态实验表明：低倍率循环流化床锅炉更适合燃烧粗颗粒的福建省无烟煤,它不仅解决因飞灰量过大造成的环境污染问题,而且还提高了锅炉的热效率。     

燃烧无烟煤循环流化床锅炉的设计

从无烟煤的特性,说明了循环流化床锅炉燃烧无烟煤的设计特点,并通过某型循环流化床锅炉,阐述无烟煤在循环流化床锅炉上的燃烧应用。     

中倍率循环流化床锅炉的研制

介绍了该厂研制的燃用福建当地无烟煤的一种中倍率循环流化床锅炉的结构、运行情况、存在问题及解决方法，分析了该锅炉的市场前景。     

论循环流化床锅炉的循环倍率

循环倍率是循环流化床(CFB)锅炉循环系统的基本特征值,是分析和设计循环流化床循环系统的前提。文章阐述循环流化床锅炉循环倍率的概念、循环倍率关系式的推导、分析及其应用。介绍作者提出的CFB锅炉循环系统的物理模型及由此导得的以给煤为基准的R循环倍率关系式及以随煤进入循环系统的固体质量为标准的K循环倍率关系式,并作进一步分析。将K循环倍率关系式与近年来普遍应用的Kj=η/(1－η)简化关系式作比较呈现出K关系式的正确性。循环倍率关系式（R或K）从理论上揭示CFB锅炉循环物料量建立和维持的基本规律,为分析循环系统奠定了理论基础,对循环系统的设计、运行有重大指导意义。     

应用底饲回燃循环流化床技术改造东锅DG35/3.82-7型流化床锅炉

采用飞灰循环底饲回燃技术改造西南合成制药总厂热电分厂、天府矿务局磨心坡发电厂2台东方DG35/3.82-7型低倍率循环流化床锅炉。改造后运行结果表明,锅炉可长期、稳定运行,尾部飞灰可燃物含量大幅度降低,锅炉蒸发量提高20％左右,节煤效果明显。为燃用贫煤、无烟煤和煤矸石等劣质燃料且锅炉炉膛高度较低的电站技改,提供了一种切实可行的方法。     

粒度对循环流化床锅炉燃烧影响的试验研究

循环流化床燃烧技术具有高效,低污染,燃料适应性广的优点,燃用福建无烟煤的循环流化床锅炉在福建沿海地区得到了广泛开展,取得了许多的成果,但是普遍存在的问题是飞灰含炭量太高,热效率不高。在一台75 t.h-1的循环流化床锅炉上对三种不同粒度的福建无烟煤进行了燃烧试验,测量了炉膛各段的温度水平,获得了粒度对底渣、飞灰的粒径分布及其含炭量和热效率等的影响特性,并针对燃用福建无烟煤的循环流化床锅炉的优化燃烧提出了一些建议,对锅炉的运行具有一定的指导意义。     

国内煤泥燃烧循环流化床锅炉研究现状

文中重点阐述了国内煤泥循环流化床锅炉的研究进展及现状,并结合煤泥在循环流化床锅炉中的燃烧特性,分析了煤泥的主要给料燃烧方式以及纯烧煤泥的循环流化床锅炉的技术特点,对我国纯烧煤泥的循环流化床锅炉的大型化具有一定的指导意义。     

循环流化床锅炉发电机组的节电措施

现役循环流化床锅炉汽轮发电机组厂用电率高达10％～13％．明显地抵消了循环流化床锅炉燃烧效率高、排放污染低、煤种适应性强等诸多优势，厂用电率高的问题已成为制约循环流化床锅炉大型化快速发展的瓶颈．其中锅炉辅机的耗电率占了很大的比例，是降低机组厂用电率的主攻方向，本文针对广东梅县发电厂三期5、6号循环流化床锅炉从运行调整、辅机系统改造等方面提出了降低循环流化床锅炉机组厂用电率的各项措施进行了分析．使循环流化床锅炉发电机组的厂用电率降到接近同类型煤粉炉发电机组的程度。     

侧向高浓度无烟煤煤粉燃烧技术的探讨

通过理论分析和实践经验提出了一种新型大容量锅炉无烟煤型煤粉燃烧器－侧向高浓度无烟煤煤粉燃烧器。这种燃烧器燃烧稳定性,有较高的燃烧效率,可防止结渣和降低ＮＯｘ排放量。     

Co-combustion of refuse derived fuel with Korean anthracite in a commercial circulating fluidized bed boiler

The effect of co-combustion of Refuse Derived Fuel (RDF) with Korean anthracite on the combustion and environmental performance was observed in the Tonghae commercial Circulating Fluidized Bed (CFB) boiler. High contents of oxygen and CaO in RDF reduced the amount of air required for combustion and the limestone flow rate for SO₂ capture in the CFB boiler, respectively. The temperature in the furnace exit increased slightly due to re-combustion of volatiles which resulted in limiting the co-combustion ratio of RDF for the CFB boiler to operate stably. With the increasing co-combustion ratio of RDF, the output voltages of electrostatic precipitator (EP), which consists of 2-channels and 5-stages collecting plates, decreased linearly. Eventually, stability of the EP could not be maintained above 5% of the RDF co-combustion ratio. The emissions of NO_x, HCl and dioxin during co-combustion did not change appreciably as compared to the case when Korean anthracite was burnt alone, which were also low enough to meet Korean emissions limits. On the other hand, chlorine contents in ashes emitted from the CFB boiler increased gradually with the increasing co-combustion ratio, which implied that most of chlorines were fixed by limestone.     

超临界W火焰锅炉燃用劣质燃料燃烧优化研究

针对W火焰锅炉运行中热效率偏低问题,对燃用的烟煤、石油焦、越南无烟煤等主要煤种开展配煤掺烧,以降低燃料成本、提高锅炉效率。从燃用煤质适应性分析、W火焰锅炉燃烧过程数值模拟和混煤掺烧优化试验3方面,研究了石油焦和越南无烟煤不同掺混比例下热解和燃烧过程特性,制定了掺烧策略并通过燃烧过程模拟研究和掺烧优化试验找到了合适的配煤掺烧方法,解决了锅炉效率低、飞灰含碳量较高、锅炉排烟温度高等问题,实现了节能降耗、提高经济效益的目的。     

煤种对循环流化床焦炭燃烧速率的影响

建立了循环流化床锅炉整体数学模型,模型中考虑了循环流化床锅炉给煤和床料的宽筛分特性,特别在燃烧模型中引入了煤种通用理论,数值分析了煤种对焦炭燃烧反应速率的影响.数值分析得到温度和煤种热态实验的温度吻合良好,改进后的模型能够准确反应不同煤种在不同粒径下的焦炭反应速率.     

Development of a supercritical and an ultra-supercritical circulating fluidized bed boiler

The supercritical circulating fluidized bed (CFB) boiler, which combines the advantages of CFB combustion with low cost emission control and supercritical steam cycle with high efficiency of coal energy, is believed to be the future of CFB combustion technology. It is also of greatest importance for low rank coal utilization in China. Different from the supercritical pulverized coal boiler that has been developed more than 50 years, the supercritical CFB boiler is still a new one which requires further investigation. Without any precedentor engineering reference, Chinese researchers have conducted fundamental research, development, design of the supercritical CFB boilers independently. The design theory and key technology for supercritical CFB boiler were proposed. Key components and novel structures were invented. The first 600 MWe supercritical CFB boiler and its auxiliaries were successfully developed and demonstrated in Baima Power Plant, Shenhua Group as well as the simulator, control technology, installation technology, commissioning technology, system integration and operation technology. Compared with the 460 MWe supercritical CFB in Poland, developed in the same period and the only other supercritical one of commercial running in the word beside Baima, the 600 MWe one in Baima has a better performance. Besides, supercritical CFB boilers of 350 MWe have been developed and widely commercialized in China. In this paper, the updated progress of 660 MWe ultra-supercritical CFB boilers under development is introduced.     

四角切圆燃烧无烟煤锅炉设计浅析

着重阐述了 30 0MW四角切圆燃烧锅炉 ,在充分考虑了无烟煤着火难、燃烬难等特点的情况下 ,利用合理的整体布置和燃烧器的选型 ,成功地达到了机组 5 0 %MCR负荷不投油稳定燃烧 ,为四角切圆燃烧锅炉在燃用无烟煤煤种的技术领域提供了有力的借鉴