Numerical modeling of the gasification based biomass co-firing in a 600 MW pulverized coal boiler

Changqing Dong; Yongping Yang; Rui Yang; Junjiao Zhang

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Numerical modeling of the gasification based biomass co-firing in a 600 MW pulverized coal boiler

机译：600 MW煤粉锅炉气化生物质同时燃烧的数值模拟

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Gasification based biomass co-firing was an attractive technology for biomass utilization. Compared to directly co-firing of biomass and coal, it might: (1) avoid feeding biomass into boiler, (2) reduce boiler fouling and corrosion problem, and (3) avoid altering ash characteristics. In this paper, CFD modeling of product gas (from biomass gasification) and coal co-firing in a 600 MWe tangential PC boiler was carried out. The results showed that NO_X emission was reduced about 50-70% when the product gas was injected through the lowest layer burner. The fouling problem can be reduced with furnace temperature decreasing for co-firing case. The convection heat transfer area should be increased or the co-firing ratio of product gas should be decreased to keep boiler rated capacity.

机译：基于气化的生物质共烧是一种有吸引力的生物质利用技术。与直接混合燃烧生物质和煤相比，它可能：（1）避免将生物质供入锅炉；（2）减少锅炉结垢和腐蚀问题；（3）避免改变灰分特性。本文对600 MWe切向PC锅炉的产品气（来自生物质气化）和煤共烧进行了CFD模拟。结果表明，当通过最低层燃烧器注入产物气体时，NO_X排放减少了约50-70％。对于共烧情况，可以通过降低炉温来减少结垢问题。为了保持锅炉的额定容量，应增加对流传热面积或降低产物气的共燃比。

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来源
《Applied Energy》 |2010年第9期|P.2834-2838|共5页
作者
Changqing Dong; Yongping Yang; Rui Yang; Junjiao Zhang;
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作者单位

National Engineering Laboratory of Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China;

National Engineering Laboratory of Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China;

National Engineering Laboratory of Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China;

National Engineering Laboratory of Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
biomass; coal; co-firing; nitric oxide (NO);

机译：生物质煤;共烧一氧化氮（NO）;

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1. Co-firing high ratio of woody biomass with coal in a 150-MW class pulverized coal boiler: Properties of the initial deposits and their effect on tube corrosion [J] . Priyanto Dedy Eka, Matsunaga Yasuo, Ueno Shunichiro, Fuel . 2017,第nova15期

机译：在150兆瓦级粉煤锅炉中将高比例的木质生物质与煤一起燃烧：初始沉积物的性质及其对管腐蚀的影响
2. A modeling approach to co-firing biomass/coal blends in pulverized coal utility boilers: Synergistic effects and emissions profiles [J] . Perez-Jeldres Ruben, Cornejo Pablo, Flores Mauricio, Energy . 2017,第FEBa1期

机译：煤粉锅炉中生物质/煤混合气共燃的建模方法：协同效应和排放特征
3. Numerical simulation investigations into the influence of the mass ratio of pulverized-coal in fuel-rich flow to that in fuel-lean flow on the combustion and NOx generation characteristics of a 600-MW down-fired boiler [J] . Environmental Science and Pollution Research . 2020,第14期

机译：数值模拟研究对富含燃料煤中粉煤流量的影响，以600 MW燃烧锅炉燃烧和NOx生成特性的燃料稀载
4. Modeling the Gasification Based Biomass Co-firing in a 600MW Pulverized Coal Boiler [C] . Dalong Jiang, Changqing Dong, Rui Yang, International Conference on Sustainable Power Generation and Supply . 2009

机译：在600MW煤粉锅炉中建模基于气化的生物量共用
5. Energy and exergy analyses of biomass co-firing based pulverized coal power generation [D] . Mehmood, Shoaib 2011

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6. Dataset on the assessment of the environmental economic and energy parameters of 5 MW CHP co-gasification plant using South African coal biomass and waste-tyre [O] . M. Ozonoh, T.C. Aniokete, B.O. Oboirien, 2018

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7. This article presents a new numerical model describing the behaviour of a thermally thick wood sample exposed to high solar heat flux (above 1 MW/m2). A preliminary study based on dimensionless numbers is used to classify the problem and support model building assumptions. Then, a model based on mass, momentum and energy balance equations is proposed. These equations are coupled with liquid-vapour drying model and pseudo species biomass degradation model. By comparing to a former experimental study, preliminary results have shown that these equations are not enough to accurately predict biomass behaviour under high solar heat flux. Indeed, a char layer acting as radiative shield forms on the sample exposed surface. In addition to this classical set of equations, it is mandatory to take into account radiation penetration into the medium. Furthermore, as biomass contains water, medium deformation consecutively to char steam gasification must also be implemented. Finally, with the addition of these two strategies, the model is able to properly capture the degradation of biomass when exposed to high radiative heat flux over a range of sample initial moisture content. Additional insights of biomass behaviour under high solar heat flux were also derived. Drying, pyrolysis and gasification fronts are present at the same time inside of the sample. The coexistence of these three thermochemical fronts leads to char gasification by the steam produced from drying of the sample, which it is the main phenomenon behind medium ablation. [O] . Pozzobon, Victor, Salvador, Sylvain, Bézian, Jean Jacques 2018

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8. Local measurements in three 1.3 MW pulverized coal flames. Vol. 2. Report for phase 4 of the project: Measurements for the validation of advanced laser based instrumentation and computer models for pulverized coal combustion systems. [R] . Jensen, P. A., Kirkegaard, M., Bak, J., 1992

机译：在三个1.3兆瓦的煤粉火焰中进行局部测量。卷。 2.项目第四阶段的报告：用于粉煤燃烧系统的先进激光仪器和计算机模型验证的测量。

Numerical modeling of the gasification based biomass co-firing in a 600 MW pulverized coal boiler

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