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1.
NC型三通道煤粉燃烧器的开发   总被引:1,自引:0,他引:1  
对国内外水泥回转窑煤粉燃烧器的发展状况进行了分析比较,确定了南京院煤粉燃烧器的具体结构形式,并地其进行了大量的冷态模型试验和计算机数值模拟研究,找到了影响燃烧器设计的基本参数,在此了开发设计出NC型煤粉燃烧器。  相似文献   

2.
窑用新型四通道煤粉燃烧器的初步研究   总被引:2,自引:0,他引:2  
本文根据新型干法窑热端煤粉燃烧器应具备的特点,对德国波力鸠斯公司开发的四通道煤粉燃烧器进行了机理研究,分析了四通道煤粉燃烧器的主要特点。  相似文献   

3.
陈功备 《陶瓷研究》1998,13(4):23-25
对快速烧成的条件及如何选择燃烧器才能满足快速烧成的要求进行了探讨分析,就如何配备合理的燃烧器以达到快速烧成目的,提出了看法。  相似文献   

4.
分析了燃烧器的稳定关火机理、燃烧器改造的设计思想,并对在稳燃、节油及经济性等方面的问题进行了讨论。  相似文献   

5.
采用双通道热线风速仪对典型三通道煤粉燃烧器形成的等温湍流场进行了测试研究,给出了轴向、切向平均速度的分布规律,探讨了相应的湍流强度分布曲线,分析了回流区、回流量的变化规律.所得结果对指导煤粉燃烧器的操作,开发新型三通道煤粉燃烧器及加深理解燃烧机理均有一定帮助,并为进一步开展理论研究提供了基础  相似文献   

6.
介绍了旋流燃烧器的发展历史和传统旋流燃烧器、分级燃烧式旋流燃烧器、低NOx旋流燃烧器的结构及原理。对国外的典型旋流燃烧器结构及特点进行了详细的介绍,并指出了在应用中存在的问题,对开发国产新型低NOx煤粉燃烧器提出了一些建议。  相似文献   

7.
王世平 《安徽化工》2003,29(6):42-43
简述了浓淡煤粉燃烧器的结构和原理,介绍了新型燃烧器在我厂锅炉上的运用,并根据燃烧器的特点分析了其对低负荷稳燃,防结渣及燃烧效率方面的影响。  相似文献   

8.
随着新型干法窑外分解技术的不断应用,对燃烧器的要求也日益提高。各国水泥装备设计、制造公司均把燃烧器作为重点设备进行开发和研制。该文主要讲述的是通过对窑煤燃烧器的改造来提高其燃烧能力.  相似文献   

9.
本文对一种新型切向射流预混克劳斯硫磺燃烧器与工业用克劳斯硫磺燃烧器进行了数值模拟计算并进行了对比。组织了冷态空气动力场试验,获得了关于该种新型克劳斯燃烧器速度场的详细数据,并验证了数值模拟结果的准确性,这为进一步改善燃烧器工作状态、提高燃烧器效率提供了基础,有助于减少污染物排放和提高经济效益。  相似文献   

10.
刘韫砚  毛小亮  孙建兵 《化工机械》2023,(4):505-509+548
以某裂解炉用圆形低NOx燃烧器为例,通过建立几何模型、网格划分、模型选取、条件设置及迭代计算等过程运用CFD技术对炉内的燃烧情况进行了数值模拟,并对计算结果进行了分析,得到了炉膛内的燃烧流动和温度分布情况,为低NOx燃烧器的研发和设计提供依据。  相似文献   

11.
The distribution of the thermal load between the burners of the glass-melting tank furnace is optimized and the conditions providing for the melting of the batch not further than opposite the second pair of burners are identified. Operating conditions that ensure complete combustion of fuel with an optimum quantity of excess air are determined. Recommendations are issued for the rational implementation of natural gas combustion in this type of furnace.  相似文献   

12.
气烧明焰辊道窑烧嘴的三维数值模拟   总被引:2,自引:0,他引:2  
采用FLUENT软件对气烧明焰辊道窑烧嘴进行三维数值模拟,模拟了其在辊道窑烧成带内的燃烧工况,研究了烧成带内烟气不同流速对窑内温度与烧嘴燃烧速度的影响,为辊道窑的运行提供了有益的参考。  相似文献   

13.
以硝酸铈为氧化剂和抗坏血酸为燃烧剂,采用燃烧法快速合成纳米氧化铈,并用XRD、IR、UV、SEM等技术进行表征.同时进行燃烧剂、煅烧温度、盐助溶剂的考察.得出燃烧法的最佳实验条件为:n(硝酸铈)∶n(抗坏血酸)=1∶2,可以不加助溶剂,不经洗涤、煅烧.在此条件下所制备的氧化铈质量轻,颗粒细.  相似文献   

14.
Conclusions Gas and air flows have been measured at burners in existing tunnel furnaces by means of diaphragms, throttle washers, and flowmeter tubes, which substantially facilitates adjusting and regulating the thermal conditions.Cylindrical and conical nozzles can be replaced in burners on working furnaces by nozzles with peripheral holes, which improve the gas-air mixing and raise the flame temperature.Intermediate burners with a pitch of 1.5 m substantially improve the firing quality and enable one to increase the loading mass in a wagon.Translated from Ogneupory, No. 3, pp. 34–37, March, 1988.  相似文献   

15.
The present work was aimed at developing and testing – under realistic operating conditions on a specifically assembled pilot plant – a novel generation of catalytic premixed fiber burners for low-environmental-impact natural gas combustion. The adoption of a palladium-LaMnO3-zirconia catalyst developed on purpose, where zirconia acts as a structural promoter and the noble metal/perovskite synergism is effectively exploited, led to enhanced performances with respect to non-catalyzed burners. In particular, lower CO and NOx emissions were recorded over a wide field of operating conditions (basically excess of air with respect to the stoichiometric condition and nominal heat power).

Also, the effect of ageing and poisoning induced by sulfur compounds added as odorants in the natural gas network was studied, with promising indications as regards the burners durability: the overall performance, in terms of pollutant emissions, appeared to have slightly improved after prolonged exposure to SO2 and high temperatures.  相似文献   


16.
Numerical studies of the slagging characteristics under different operational conditions in a 300 MW down-fired boiler were carried out using slagging models coupled with gas-solid two phase flow and combustion models. Combined with the real operating conditions; comparative and detailed analysis on the slagging position, extent, and causes is presented. The results show that the serious slagging is mainly on the side walls of the lower furnace. Because of the more rapid expansion of the flue gas under the higher temperature, the flue gas in the furnace center makes the flue gas on both sides deflect and flow to the side walls; and the pulverized-coal flame impinges on the side walls. This results in the slagging on the side walls. Under off-design operating conditions, such as stopping some burners, the local flow field is asymmetric and impinges on the local arch burner, front and rear wall regions where the stopped burners are located. It leads to slight slagging on the arch burner regions and the front and rear wall regions of the lower furnace. Based on the investigation, it has been found that the serious slagging on the side walls can be effectively alleviated by cutting off the burners close to the side walls, reducing boiler load and burning low slagging-tendency coals.  相似文献   

17.
As an alternative to previously developed catalytic FeCrAlloy fibre mat burners based on perovskite catalysts, new catalytic burners have been developed based on Pd catalyst on lantana-stabilised Al2O3 and different fibre structures (NIT100A, NIT100S and NIT200S by ACOTECH NV). All development steps are considered, shifting from catalyst preparation (based on combustion synthesis of γ-Al2O3) to the optimisation of lantana and Pd loadings, from the definitions of the best catalyst-deposition conditions (washcoating) to the catalytic burners performances, determined in an ad hoc developed combustion chamber. The results show almost half pollutants emissions and better performance compared to various non-catalytic counterparts, especially as far as CO and NOx emissions are concerned. Some flame instability problems were though registered, especially for one of the catalytic burner mattresses employed, at low specific power inputs and excesses of air (<375 kW/m2 and <12%, respectively). Further, PdO/Pd transition is shown to influence the dynamic behaviour of the catalytic burners.  相似文献   

18.
卧式安瓿生产线是制作易折曲颈安瓿的主要设备。该生产线配置上百个燃烧器和燃烧系统,担负着由玻璃管制成安瓿工艺过程中的压颈、拉丝、熔断、复切、圆口、切底、烤底、退火等工序的加热。国产和引进的燃用城市煤气的卧式安瓿机在线燃烧器堵塞不畅是突出问题。有的企业为解决燃烧器堵塞,增设煤气净化装置,费钱费时又占地。  相似文献   

19.
本文首次向国内陶瓷界介绍一种具有九十年代国际先进水平的喷雾燃烧技术——气泡雾化喷雾技术。结合我国目前的陶瓷窑炉烧嘴现状以及WDH型烧嘴在国内各行业的应用情况,介绍了WDH型烧嘴的原理,优点以及推广后的经济效益。  相似文献   

20.
介绍了Shell粉煤气化装置烧嘴布置结构,分析了煤烧嘴安装检修中误差存在的原因,提出了控制精度安装煤烧嘴的方法。在安装煤烧嘴前,先用模拟烧嘴和仿真烧嘴定位,测量和加工调整环及石墨缠绕垫的厚度,最后安装煤烧嘴,以确保安装的准确性。  相似文献   

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