共查询到19条相似文献,搜索用时 63 毫秒
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以提高锅炉热效率和降低NO_x排放量为主要目的,对某电厂300 MW机组,HG-1025/17. 5-HM四角切圆锅炉进行了燃烧调整试验研究。试验结果综合反映了锅炉的各个运行工况对氮氧化物排放浓度以及锅炉热效率的影响。通过对各个工况试验结果的分析比较,给出了可以兼顾NO_x排放量和锅炉热效率的运行调整方式。 相似文献
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锅炉燃烧调整对NOx排放和锅炉效率影响的试验研究 总被引:7,自引:0,他引:7
在2台典型的1025 t/h锅炉上进行了燃烧调整降低NOx排放浓度的试验研究,通过改变过量空气系数、辅助风配风方式、运行负荷和制粉系统运行方式等,测定了锅炉尾部烟道NOx排放浓度,分析了锅炉运行工况、运行方式对NOx排放的影响.结果表明:降低过量空气系数,烟煤锅炉NOx减排效果比贫煤锅炉好得多;降低负荷,烟煤锅炉的NOx排放量降低值较大;缩腰式配风的NOx排放浓度比均匀配风方式约降低10%,制粉系统的运行方式影响炉内燃料的燃烧状态和温度分布,也影响NOx的生成和排放.在不降低锅炉效率的前提下,调整燃烧工况,可降低锅炉排放NOx浓度1O%~20%. 相似文献
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阐述了锅炉燃烧调整的任务和目的,分析了影响燃烧的因素和强化燃烧的措施以及不同煤种的燃烧调整原则,针对锅炉的燃烧调整进行了深入的探讨和研究,为提高锅炉安全、经济运行提供参考和借鉴。 相似文献
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在一个流化床反应器和一个固定床反应器中研究了流化床煤燃烧中N2O及NOx生成的机理。发现流化床煤燃烧中N2O和NOx主要来自于煤中的氮,即挥发分氮和焦炭氮,部分NOx来自于空气中的N2。 相似文献
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锅炉燃烧系统优化调整试验研究 总被引:1,自引:0,他引:1
分3个不同负荷采用正交试验设计法设置调整工况,并安排了调整工况试验前后的习惯运行方式试验及优化工况试验。结锅炉测试效率进行了环境温度、给水温度及煤种修正,得到锅炉毛效率。全面考虑了锅炉辅机电耗和锅炉主、再热蒸汽温度对机组经济性的影响,提出了锅炉综合效率这一概念。通过试验,提高锅炉运行的经济性和安全性,降低了锅炉NOx排放量,锅炉综合效率平均提高2.29%,炉内燃烧区护膛温度平均提高28℃,NOx排放量平均降低213mg/m^3,为锅炉安全经济运行提供参考。 相似文献
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高炉煤气锅炉燃烧中氮氧化物污染物的控制 总被引:1,自引:0,他引:1
文章介绍了氮氧化物生成机理及高炉煤气锅炉燃烧中氮氧化物污染物的控制.通过对NOx生成机理的讨论,高炉煤气燃烧时主要产生的NOX为热力型NOX,采用多层燃烧器的布置,把燃烧器组设计成浓淡燃烧器, 从而降低NOX的生成,使锅炉NOX排放达标,使之成为一种环保型污染气体治理设备. 相似文献
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Anna-Karin Hjalmarsson 《国际能源研究杂志》1990,14(8):813-820
The paper gives a discussion of the regulatory framework currently being used to limit nitrogen oxide (NOx) emissions, with emphasis being placed on EC and UN measures. It then follows with a discussion of the procedures being adopted at present to control or limit these emissions. The topics discussed include combustion modification measures, new combustion technologies, flue gas treatment, selective catalytic reduction, selective noncatalytic reduction and combined SOx/NOx processes. 相似文献
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针对齐鲁石化热电厂#4炉燃烧状况不佳,灰渣可燃物含量偏高等问题,进行了燃烧优化调整试验。并对试验结果进行了分析,提出了煤粉细度和风量等参数的优化控制值。经过燃烧调整,灰渣可燃物含量有了较大幅度降低。 相似文献
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采用燃烧优化技术进行了降低某厂300MW机组1号锅炉NOx排放的试验,在提高锅炉运行经济性的同时,大大降低了锅炉NOx的排放浓度。分析了该炉热效率和NOx排放浓度与锅炉运行参数的关系,确定了锅炉低NOx运行方式,可用于指导锅炉的高效低NOx的运行。 相似文献
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锅炉的优化调整与性能试验 总被引:2,自引:0,他引:2
对锅炉优化调整的意义、要求、内容和基本方法进行了阐述,指出了锅炉性能试验与优化调整的关系,并以一台410t/h锅炉的燃烧优化调整为例说明了优化调整的具体过程,及其对提高锅炉机组运行经济性、实现节能降耗的必要性。 相似文献
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《能源学会志》2019,92(6):1807-1820
The purpose of the work is to determine the impact of a commercial coal additive on the efficiency and the pollutants emissions of an industrial boiler. The tests were carried out in a 41.1 MW thermal output moving grate boiler in common operating conditions for a period of two months. At that time, coal was alternately dosed with and without the additive. The amount of the additive to coal ratio was fixed at 1L/Mg during the tests. The additive applied was a 20% aqueous solution of four compounds, i.e. isopropanol, manganese (II) acetate tetrahydrate, acetic acid glacial … % and N,N-Dimethylethanolamine.The samples of coal, bottom and fly ash were collected from the installation twice a day during the tests in order to check their properties. The boiler's main energy parameters and the emission levels of CO, NOx, SO2 and dust were measured and registered. The additive influence on the boiler operation was evaluated based on the efficiency and three indicators which highlighted this impact.The additive influence was mainly demonstrated in boiler efficiency increase, in the range of 0.5–1 p.p., as well as the oxygen concentration in the flue gas which indicates that there was a decreased amount of the combustion air. On the other hand, the studies do not show any evident influence on the NOx, SO2 and CO emissions with the applied catalyst to fuel ratio. The research showed that even a little improvement of efficiency gives a measurable economic effect. 相似文献
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《International Journal of Hydrogen Energy》2022,47(65):28188-28203
Hydrogen-enriched natural gas (HENG) is a promising low-carbon fuel in the industry. The fuel flexibility of the existing natural gas-fueled industrial combustion equipment is a crucial issue for the HENG application. This study evaluates the thermal and emission performances of a large-scale industrial steam boiler fueled with HENG. Considering different operation strategies, three boiler operation scenarios were proposed, namely, the unchanged fuel/air valve opening (Scenario 1), the maintained boiler capacity with unchanged valve control logic (Scenario 2), and the maintained boiler capacity with unchanged excess air ratio (Scenario 3). A model considering the thermal equilibrium and heat transfer inside the boiler was built to study the thermal efficiency under the three scenarios, and a chemical reaction network model was established to investigate the NOx emission characteristics. The results showed that thermal efficiency and NOx emission presented a similar variation trend. Both of them decreased in Scenarios 1 and 2 while increased in Scenario 3 as hydrogen volumetric fraction in HENG increased from 0 to 0.9. The differences in decarbonization potentials among the three scenarios were limited. This study implies that the trade-off between thermal efficiency and NOx emission should be carefully concerned when applying HENG to industrial steam boilers. 相似文献
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Research of boiler combustion regulation for reducing NOx emission and its effect on boiler efficiency 总被引:1,自引:0,他引:1
The effect of boiler combustion regulation on NO_x emission of two 1025t/h boilers has been studied.The re-searches show that NOx emission is influenced by coal species,operation conditions,etc,and can be reduced byregulating the combustion conditions.The effect of combustion regulation on boiler efficiency has also beenchecked. 相似文献