循环流化床锅炉床下启动燃烧器的设计

本文介绍了循环流化床锅炉床下启动燃烧器的出力选取办法、结构布置形式和运行方式。启动燃烧器出力应根据锅炉点火时所需烟气温度以及所需的烟气量来确定；启动燃烧器由中心燃烧器以及外层冷却风道组成，中心燃烧器按平流式油燃烧器设计计算；点火风道的设计应考虑其空间能满足点火燃料的完全燃烧以及与冷却风的混合。     

循环流化床锅炉点火燃烧器的发展及应用

介绍了循环流化床的特点和循环流化床锅炉点火燃烧器的发展、类别.指出循环流化床锅炉点火或低负荷投油助燃所采用的床上启动燃烧器、风道燃烧器和床枪的特点及选择原则.     

50MW高压循环流化床锅炉油枪的启动

以某电厂 5 0MW高压循环流化床锅炉为例 ,介绍了床上床下启动燃烧器的启动顺序及油枪配风的影响 ,讨论燃烧器如何合理布置及启动     

新型三功煤粉锅炉燃烧器

三功能燃烧器是在偏置射流燃室的基础上发展起来的一种新型煤粉燃烧器，它是利用一次风射流，控制射流和整流射流组合的空气动力学原理研制的，具有锅炉冷态点火启动，低负荷稳定火焰和作主燃烧器运行三项功能，该燃烧器可利用锅炉原有的供粉系统和一次风管道，并能在运行中方便地转换稳粉和主燃烧器功能，及调节着火点的距离，试验和运行表明，该燃烧器完全能够满足锅炉调峰的要求，具有重要的实用价值和显著的节油效果。     

LNASB轴向旋流式煤粉燃烧器的微油点火改造

微油点火是国家节能减排重点推荐的节能措施之一,各大型火电机组纷纷应用微油点火技术来减少启动过程的燃油消耗,但LNASB燃烧器由于有中心风的存在,使微油点火改造过程中燃烧器改动量非常大,必然影响着燃烧器正常性能。文章从扬二厂#4炉LNASB燃烧器微油点火系统改造讲述了该型燃烧器的改造可能性、改造调试过程、改造后燃烧器特性变化及节能效果。     

410t/h循环流化床锅炉床下启动燃烧器烧损原因分析及解决措施

针对410t／h循环流化床锅炉床下启动燃烧器严重烧损问题，详细分析了烧损原因，提出解决问题的方案，并取得了良好的效果。     

高原暖风机点火燃烧系统的试验研究

针对高原低温、缺氧、气压低的客观现实，通过对轻油燃烧器点火困难、火焰燃烧不稳定及燃烧不完全现象的理论分析，并对燃烧器的配风器、喷火筒及点火系统的数次改进，进行了平原和高原的多次实验，最终使高原暖风机的启动性能及整体燃烧性能接近平原暖风机的水平。     

410 t/h循环流化床床下启动燃烧器制造工艺探讨

主要论述床下启动燃烧器制造中出现的疑难问题 ,在不影响生产周期且节约制造费用的前提下 ,采取相应措施进一步完善设计、工艺制造方案 ,使其性能、质量得以充分保证 ,对床下启动燃烧器的进一步开发具有一定的指导意义     

稳燃腔正交射流燃烧器的设计原则及稳燃机理探讨

稳燃腔正交射流燃烧器是在稳燃腔钝体燃烧器的基础上提出的一种新型煤粉燃烧器,它利用空气动力学原理产生高温烟气的回流,从而强化煤粉气流的着火与稳定燃烧。本文报道了采用该燃烧器进行冷,热态试验的结果,提出了燃烧器设计的原则,并详细探讨了其稳燃的机理。     

煤粉燃烧器计算机辅助设计

煤粉燃烧器作为锅炉燃烧系统的重要组成部分，它直接影响锅炉炉内燃烧工况和燃烧效率，其选型和设计在整个锅炉设计过程中显得很关键，对其过程进行优化将具有很大意义，本文将计算机辅助设计技术引入到煤粉燃烧器的设计中，作者首先阐述了炉膛及燃烧器ＣＡＤ的基本思想，接着介绍了单只煤粉燃烧器ＣＡＤ过程，最后以成熟的稳燃腔燃烧器为对象进行了ＣＡＤ实践。     

某电厂220t/h锅炉煤粉燃烧器改造设计方案

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。     

低热值煤层气燃烧器的数值模拟

对一种低热值煤层气燃烧器进行了全尺寸的三维燃烧数值模拟研究,预测了燃烧器出口的流场、温度和组分分布情况,并考察了不同热负荷和不同喷口形式对燃烧器性能的影响。结果表明该燃烧器具有较宽的负荷调节能力,渐缩喷口燃烧器燃烧温度最高且射流刚性好,50%~100%热负荷内渐扩喷口燃烧器燃烧性能最佳,25%热负荷下渐缩喷口燃烧器燃烧性能最佳。模拟结果对该燃烧器的进一步优化设计有一定的指导意义。     

扬州第二发电厂600MW机组锅炉燃烧器的调整试验研究

分析了美国B&W公司设计制造的600MW机组锅炉DRB-XCL型低NOX双调风燃烧器的结构特点,通过燃烧器冷热态试验,全面掌握DRB-XCL型低NOX双调风燃烧器的运行特性。从燃烧器试验结果看,这种DRB-XCL型低NOX双调风燃烧器具有燃烧效率高、对煤种适应性广、NOX生成水平低、低负荷稳燃能力强的特点。采用合理的运行方式,锅炉效率达到93.9%。对DRB-XCL型燃烧器的试验研究结果,可为我国旋流燃烧器的设计和技术改造提供参考。     

采用旋流拱顶燃烧器的W型锅炉炉内流动特性

采用旋流燃烧器,可以强化燃烧器出口煤粉气流的着火,配合采用燃烧器内部分级燃烧方式后,也有利于降低污染气体的排放。但采用旋流燃烧器后,由于W型锅炉燃烧的特殊性,给锅炉的设计和运行带来了新的情况,如对旋流燃烧器在W型锅炉拱顶采用旋流燃烧器后炉内的空气动力特性不能很好得到掌握,不但得不到旋流燃烧器所带来的优点,还会引起很多问题。本文对采用旋流燃烧器的W型锅炉的炉内多相流动特性进行分析,并与相应的采用直流燃烧器的W型锅炉进行对比,指出在采用直流燃烧器的W型锅炉设计中常采用的参数在采用旋流燃烧器时可能会出现的问题,并提出了改进的方法。     

Bituminous coal combustion in a full-scale start-up ignition burner: Influence of the excess air ratio

A start-up ignition burner has been proposed to reduce oil fuel consumption during the firing-up process and partial-load operation. To investigate the influence of different excess air ratios on bituminous coal combustion in the start-up ignition burner, full-scale reacting-flow experiments were performed for an experiment setup. The ignition burner was identical to that normally used in an 800 MWe utility boiler. Gas temperature distributions in the burner were obtained for excess air ratios of 0.56, 0.75, 0.98 and 1.14 (corresponding to primary air velocities of 17, 23, 30 and 35 m/s). Coal burnout and the release of C and H were observed at the exit of the burner nozzle. Gases such as O₂ and CO were measured at the center of the burner. A change in resistance was obtained within the burner.     

煤粉炉微油点火燃烧器设计

介绍了对一台容量为50WM锅炉的煤粉燃烧器的改造过程。根据燃烧理论,将原来的煤粉燃烧器改造成了微油点火燃烧器,并介绍了燃烧器的设计思想,以及小油枪的计算方法。微油点火燃烧器采用了分级燃烧方式和二次风冷却技术,能够很好起到稳燃和冷却的作用。改造后的效果表明该燃烧器锅炉启停速度快,燃烧稳定,节约燃油,降低了生产成本。     

电弧炉煤氧助熔用内混式煤氧枪

在电弧炉煤氧助熔外燃式煤氧枪的研究基础上，对内混式煤氧枪进行了试验研究，探讨了所研究因素对煤氧枪的轴向速度及火焰燃烧特性的影响，并通过研究来获得煤氧枪设计和运行的论据，对电炉炼钢工艺进一步降有耗是有意义的。     

A fibre‐mat catalytic burner for the heating system of PVC tiles

This study aims to develop the low‐temperature catalytic burner using Al₂O₃ fibre and Pt catalyst as a substrate and an active material, respectively, and then to apply it to the heating system of PVC tiles. Three types of fibre‐mat catalytic burners—natural diffusion catalytic burner, forced diffusion catalytic burner and premixed catalytic burner—were tested. For the natural diffusion catalytic burner, the combustion efficiency was significantly affected by the installation method. Its combustion efficiency was above 99.5% when it was placed vertically and upward, whereas the combustion efficiency rapidly deteriorated to less than 80% when it was installed in downward position. When the forced diffusion combustion mode was employed, the combustion efficiency of the fibre‐mat catalytic burner was successively improved over 99.5%. The optimal operation condition of the premixed fibre‐mat catalytic burner was obtained when the excess air ratio is 4.3 and the heat load is 3.0 kcal h^?1 cm^?2. The heat load of the premixed catalytic burner was found to be twice as much as those of the natural and forced diffusion catalytic burner, meaning that the size of the catalytic burner can be reduced to its half if the premixed catalytic burner is used. We also performed the field test of the fibre‐mat catalytic burner in the heating system of the PVC tiles. The combustion efficiency of the catalytic burners appeared to be satisfactory, above 99.5%, and the energy saving by replacing the existing electrical heaters with the fibre‐mat catalytic burners were shown to be 27.7%. Copyright © 2002 John Wiley & Sons, Ltd.     

油气燃烧器的运行性能与调整措施研究

燃油燃气燃烧器是燃油燃气锅炉的核心部件,它对烟尘和SO2的排放有重要的影响。本文分别对重油燃烧器在非正常运行工况、轻油燃烧器、FM数字式燃烧器这三种情况的运行性能和对烟尘、SO2排放的影响进行分析,最后给出每个运行情况下的调整措施。     

Optimization of producer gas fired premixed burner

Much work is reported in the literature pertaining to premixed burners using hydrocarbon fuels. However, very little work is available on similar burners using producer gas as a fuel. The present work aims at testing and optimization of a premixed burner with producer gas as a fuel.A burner of 150 kW capacity is used in the experimental investigations. The burner is of concentric tube type fully premixed in which air is supplied through central pipe and gas is supplied through annular passage. Swirl vane is provided to air and gas for thorough mixing. The bluff body is provided for flame stabilization. The premixed burner was tested on open core throat-less down draft gasifier for flame quality. A stable and uniform flame was observed with this premixed burner. Thereafter, an instrumented test set up to evaluate burner performance was installed on an open core gasifier. The burner was experimentally optimized for size and location of bluff body and flammability limits. The burner was optimized by using bluff bodies of 46, 61, 73, 80, 85, 98, 110 and 122 mm diameters. The burner was operated in batch operation of 6–8 h for optimization of various parameters. The experiment reveled that the uniform and high-temperature premixed flame was observed at conventional bluff body having blockage ratio of 0.65. The flammability limits for producer gas fired burner was established in the range of 40–55.