Numerical Simulation of O₂/CO₂ Pulverized Coal in 300MW Boiler

Abstract:

O₂/CO₂ combustion technology is an effective method to capture and store coal-fired boiler flue gas CO₂. With a 300MW subcritical pulverized coal boiler as the research subject investigated, Fluent numerical simulation software is used to simulate the process of pulverized coal combustion both in air and O₂/CO₂ conditions. The comparative analyses are made both in the former conditions, such as the combustion characteristics of pulverized coal, the influence of oxygen volume fraction, the effect of the secondary air temperature on the temperature field in the furnace of pulverized coal boiler. As for the following results of the pulverized coal combusted in the O₂/CO₂ condition, compared with the results in the air condition, its time of ignition is delayed, and the combustion temperature is low and the central position of flame rises. With the increasing percentage of the oxygen volume and the rising temperature of secondary air, the time of ignition speeds up, which improves the overall furnace temperature level and transferring capability of the radiation heat.

• Periodical: Advanced Materials Research (Volumes 732-733)
• Pages: 133-137
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.732-733.133
• Online since: August 2013
• Authors: Li Li Li*, Chao Qu
• Keywords: Boiler, Numerical Simulation, O₂/CO₂ Combustion Technology

References

[1] Yu Yan, Jintian Yang: Environmental Pollution and Control. Vol.32 (2009), p.92"In Chinese"

[2] Yanfeng Liu, Jianqiang Wang, Xiujun Liang: Thermal Power Engineering. Vol.24 (2009), pp.177-181 "In Chinese"

[3] Weiping Yan,in: Clean Coal Power Generation Technology(China Electric Power Press,China 2002)."In Chinese"

[4] WALL TEERY F. Combustion Institute.Vol.31(2007),P.31-47

[5] Yaling Zhang, Dong Fang:Control and Recovery of Greenhouse Gas By CO2(China Environmental Science Press,China1996). "In Chinese"

[6] Zhaochang Han: Fuel and combustion(Metallurgical Industry Press,China2004) "In Chinese"

[7] Weideng Fan,Yupeng Wan:Flow and combustion and calculation (University of Science & Technology China press, China 1994)."In Chinese"

[8] Chanshen Tan, Numerical simulation of mixed coal combustion process in a 700M tangentially fired boiler, School of energy and power engineering of Chongqing University.2006"In Chinese"

[9] Canwen Cai, Jing Jin, Yao Lu,Dandan He: Energy Research and Information.Vol.26(2010), pp.82-86"In Chinese"

[10] Yanfeng Liu :Combustion and Gasification Of Pulverized-Coal in High Concentration Dioxide. North China Electric Power University.2001"In Chinese"