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MODELLING OF DYNAMICS OF COMBUSTION OF BIOMASS IN FLUIDIZED BEDS
fluidized bed combustion dynamics
2009/10/13
New process concepts in energy production and biofuels, which are much more reactive than coal, call for better controllability of the combustion in CFB boilers. Simplified analysis describing the dyn...
Fludized bed technology is very suitable for the combustion of biomass. Nevertheless substitution of coal with biomass affects boiler operation and especially dynamics and controllability. Non-homogen...
FLUIDIZED BED COMBUSTION WITH THE USE OF GREEK SOLID FUELS
fluidized bed co-combustion boilers
2009/10/13
The paper is an overview of the results obtained up to date from the combustion and co-combustion activities with Greek brown coal in different installations, both in semi-industrial and laboratory sc...
FLUIDIZED BED COMBUSTION RESEARCH AND DEVELOPMENT IN SWEDEN - A HISTORICAL SURVEY
combustion technologies fluidized bed combustion boilers
2009/10/13
A survey is made on research and development related to fluidised bed boilers in Sweden during the past two decades, where several Swedish enterprises took part: Generator, Götaverken, Stal Laval...
CAPTURE OF SO2 BY LIMESTONE IN A 71 MWE PRESSURIZED FLUIDIZED BED BOILER
fluidized bed combustion limestone sulfur dioxide attrition
2009/10/13
A 71 MWe pressurized fluidized bed coal combustor was operated. A wide variety of coals were burnt under fly ash recycle conditions. Limestone was fed to the combustor as bed material as well as sorbe...
AGGLOMERATION OF BED MATERIAL: INFLUENCE ON EFFICIENCY OF BIOFUEL FLUIDIZED BED BOILER
biomass combustion bubbling fluidized bed agglomeration
2009/10/13
The successful design and operation of a fluidized bed combustor requires the ability to control and mitigate ash-related problems. The main ash-related problem of biomass firing boiler is agglomerati...
IN-SITU LASER SPECTROSCOPY OF CO, CH4, AND H2O IN A PARTICLE LADEN LABORATORY-SCALE FLUIDIZED BED COMBUSTOR
coal, biomass pyrolysis in situ laser spectroscopy
2009/10/13
The pyrolysis, devolatilization and char combustion of bituminous coal and biomass (beechwood, firwood) were investigated in a laboratory-scale fluidized bed combustor by tunable diode laser spectrosc...
日照电厂2#锅炉屏式过热器泄漏原因
屏式过热器 晶间腐蚀 泄漏
2009/9/25
针对日照电厂2#锅炉屏式过热器泄漏进行了金相试验、晶间腐蚀倾向性试验和电镜能谱分析.结果表明，2#-3#焊口间管段发生了严重的晶间腐蚀，屏式过热器泄漏的主要原因为晶间腐蚀.
超临界循环流化床锅炉将循环流化床(circulating fluidized bed，CFB) 燃烧技术与超临界蒸汽压力循环的优点相结合。水冷壁流量分配是超临界循环流化床锅炉运行的一个主要技术关键。该文建立了计算复杂流动网络系统回路流量及节点压力的数学模型，并对非线性方程组采用迭代方法进行求解。对一台600 MW中低质量流速超临界循环流化床锅炉水冷壁流量分配及壁温分布进行计算，分析中低质量流速在超...
300MW等级亚临界循环流化床锅炉
循环流化床锅炉 300MW等级
2009/9/18
东方锅炉（集团）股份有限公司自主研发的300MW等级亚临界循环流化床锅炉，首次采用了三分离器非对称布置、不设置外置式换热器；单炉膛、两侧进风大风室及不同风帽的组合；在炉膛内合理布置过热器、再热器受热面等，保证了锅炉布风、物料均匀，各系统热量分配合理。宝丽华荷树园电厂3、4号两台机组运行表明，锅炉具有良好的负荷调节性能和运行性能，锅炉性能考核试验各项数据均优于性能保证值，锅炉总体技术先进，设计合理，...
电站锅炉回转式空气预热器柔性接触式密封装置
空气预热器 电站锅炉
2009/9/18
柔性接触式密封装置在技术原理、工艺结构和用材方面具有独创型，具有自主知识产权，获得国家发明专利。采用该技术进行空气预热器密封改造后，漏风率可降低到4%-7%，密封性能稳定，风机电耗显著下降，节能效果突出。控制锅炉空气预热器漏风率的技术指标达到了国际先进水平。该技术已成功改造了50MW到800MW不同容量等级机组、不同结构的五十多台空气预热器。该装置长周期运行稳定，维护方便。该技术可广泛应用于电站锅...
底饲进料循环喷动床颗粒分布特性
底饲进料循环喷动床 气固两相流 颗粒通量
2009/9/17
为研究底饲进料方式对于改善反应塔内颗粒分布对称性和均匀性的效果，在一台f 0.6 m′15 m的底饲进料循环喷动床冷态实验装置上，通过等速取样的方法得到反应塔内正向颗粒通量在截面上的分布规律，并比较不同操作条件对颗粒通量径向分布的影响。研究结果表明：相对于面饲方式，采用底饲进料能够显著改善颗粒相在截面各方向上的分布均匀性；流化速度和喷射速度是影响塔内颗粒分布的重要因素，随着流化速度的上升...
220 t/h锅炉燃烧低挥发分水煤浆结渣特性的试验研究
低挥发分水煤浆 综合评判 结渣特性
2009/9/17
低挥发分水煤浆比精煤水煤浆在价格上有明显的优势，在锅炉上燃用水煤浆除考虑着火和燃烧稳定性外，结渣特性是另一重要的影响锅炉安全经济运行的因素。文中就大型锅炉燃烧低挥发分水煤浆，利用硅碳棒进行结渣试验，采用单一结渣指标，通过对渣层厚度、沉积量和沉积速率的变化分析及X–射线衍射图谱和扫描电镜分析，模糊综合评判模型，获得低挥发分水煤浆燃烧结渣特性。结果表明，低挥发分水煤浆的结渣情况在可接受的范围内...
高温空气点火在200MW机组锅炉中的应用
煤粉 燃烧 点火
2009/9/17
高温空气点火技术用于煤粉锅炉的稳定燃烧和点火过程，有利于提高锅炉运行的经济性、安全性。文中针对某200 MW机组锅炉的实际要求，按1:1比例建造三级高温空气点火燃烧器实验台，进行数值模拟及实验研究，得到了煤粉浓度、一次风速度等运行参数与着火特性之间的关系。模拟结果与试验结果，趋势相同。将该燃烧器安装到实际锅炉上，进行锅炉的启动点火试验，点火成功，燃烧稳定。研究结果对此燃烧器的改进及进一步应用提供参...