The study on the heat transfer characteristics of oxygen fuel combustion boiler

Wu, Haibo; Liu, Zhaohui; Liao, Haiyan

doi:10.1007/s11630-016-0886-3

Cited by 9 publications

(7 citation statements)

References 5 publications

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“…Similar results were obtained in the study of air distribution in a propane burner (Liu et al, 2015). A number of experiments have shown that a reasonable combination of primary air and secondary air has a very positive effect on the flame temperature in the furnace (Wu et al, 2016). Some scholars have studied the adaptive air distribution by improving the nozzle structure and the results also showed that the organization of air flow is very important (Li et al, 2018;Elbaz and Roberts, 2016).…”

Section: Introductionsupporting

confidence: 73%

Effect of Air Quantity Distribution Ratio on Flame Height of Flue Gas Self-Circulation Burner

Xie

Cui

Qiu

et al. 2020

JAFM

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It is a difficult scientific problem of applied fluid mechanics that the flame is too long and does not match the furnace chamber in a small restricted heating space. This paper aims to investigate the effect of the air quantity distribution ratio on the flame height of a flue gas self-circulation burner. In order to obtain a better combustion emission effect and a shorter flame height, a burner head structure with a small flue gas selfcirculation was designed. Numerical simulation was employed to investigate the effect of the different distributions of central air, swirling air and secondary air on flame height. The periodic boundary condition model was adopted and the numerical model was compared and validated by experiment. Correlation analysis was used to determine the influence of the air inlet ratio of each part on the flame height and recirculating flue gas ratio (RFGR). The results show that the influence of different air quantity distributions on flame length is very significant. A reasonable central air ratio is a necessary condition for the good combustion of this flue gas self-circulation burner. Secondary air can effectively increase the RFGR, and flame height was significantly shorter with the increase of RFGR, but when it increased to more than 12%, the flame length was basically no longer shortened. On the premise of stable combustion, when the ratio of central air, swirling air and secondary air are respectively 25%, 35% and 40%, the shortest flame length is achieved. This work reveals an influence mechanism of the flame height of a small burner with a flue gas circulation structure. These results can provide theoretical support and an engineering design basis for the short flame problem in a small restricted space.

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Section: Introductionsupporting

confidence: 73%

Effect of Air Quantity Distribution Ratio on Flame Height of Flue Gas Self-Circulation Burner

Xie

Cui

Qiu

et al. 2020

JAFM

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“…It is therefore a kind of clean and efficient coal‐fired power generation technology . Because of the obvious difference between the combustion medium of the oxy‐fuel environment (O 2 /CO 2 ) and the air in the atmosphere (O 2 /N 2 ), the characteristics of combustion, heat transfer, and pollutant emission under oxy‐fuel combustion have changed greatly …”

Section: Introductionmentioning

confidence: 99%

“…3,4 Because of the obvious difference between the combustion medium of the oxy-fuel environment (O 2 /CO 2 ) and the air in the atmosphere (O 2 /N 2 ), the characteristics of combustion, heat transfer, and pollutant emission under oxy-fuel combustion have changed greatly. 5 Oxy-fuel combustion technology can be applied to new or retrofitted power plants. Owing to uncertainties regarding low carbon policy and CO 2 utilization, the feasibility and application of air combustion should be considered in the oxy-fuel combustion demonstration project.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of oxy‐fuel combustion characteristics in a 200 MWe coal‐fired boiler

Yu²,

Liu

et al. 2019

Greenhouse Gases

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Oxy‐fuel combustion in coal‐fired plants has become one of the most promising technologies for carbon capture and storage (CCS). Because of the obvious difference between the oxy‐fuel combustion medium (O2/CO2) and air in the atmosphere (O2/N2), the characteristics of combustion, heat transfer, etc., under oxy‐fuel combustion have changed greatly from those under air combustion. In this paper, computational fluid dynamics (CFD) simulation was used to investigate pulverized coal combustion in a 200 MWe tangentially fired oxy‐fuel combustion boiler. Improved models for the gas radiative properties and chemical reaction mechanisms were incorporated into the CFD code. Both conventional air‐fired and oxy‐fuel combustion were operated. Different flue gas recycling patterns (dry recycling and wet recycling) were also investigated. The temperature distribution in the furnace, the temperature field, and the CO concentration field in each scheme were analyzed, this being relevant to the design of oxy‐fuel combustion boilers. It was found that combustion could form a good tangential circle and stable temperature field in the furnace either under air‐fired or oxy‐fule combustion conditions. The temperature under oxy‐fuel combustion was lower than with air combustion. The burnout rate under the air condition was lower than that with the oxy‐fuel combustion condition. With oxy‐fuel combustion, it is necessary to pay special attention to the slagging tendency of the primary combustion zone in the furnace. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…Recently, carbon dioxide emissions have gained increasing research attention. Anthropogenic CO 2 emissions are the main cause of global warming, and power plants are the main source of carbon dioxide emissions. − Oxy-fuel combustion technology can reduce the emission from coal-fired power plants and store CO 2 safely in an underground aquifer. , Oxy-fuel combustion is a CO 2 capture technology that is yet to be commercially applied . The technology achieves efficient coal combustion by using mixed O 2 and recycled flue gas.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Removal of SO_x and NO_x in CO₂ Compression and Purification in Oxy-Fuel Combustion Power Plant

Wu²,

Zheng

et al. 2019

Energy Fuels

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Oxy-fuel combustion is a carbon-reduction technology that can be utilized in coal-fired power plants. A compression and purification system is an important part of an oxy-fuel combustion power plant. This study aims to develop suitable technologies as well as equipment for CO 2 compression and purification for oxy-fuel combustion. A 300 t/a CO 2 compression and purification experimental system was designed. The proposed platform can be operated under good performance. The average desulfurization and denitration rates under different working conditions are more than 98%. Changes in the n(SO 2 ):n(NO x ) ratio exert limited effects on sulfur and nitrate purification. SO 2 can be partially oxidized into SO 3 under the pressurized atmosphere and the presence of O 2 and NO x . Moreover, SO 2 oxidation is promoted with pressure and the existence of H 2 O and NO x .

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The study on the heat transfer characteristics of oxygen fuel combustion boiler

Cited by 9 publications

References 5 publications

Effect of Air Quantity Distribution Ratio on Flame Height of Flue Gas Self-Circulation Burner

Effect of Air Quantity Distribution Ratio on Flame Height of Flue Gas Self-Circulation Burner

Numerical simulation of oxy‐fuel combustion characteristics in a 200 MWe coal‐fired boiler

Synergistic Removal of SO_x and NO_x in CO₂ Compression and Purification in Oxy-Fuel Combustion Power Plant

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The study on the heat transfer characteristics of oxygen fuel combustion boiler

Cited by 9 publications

References 5 publications

Effect of Air Quantity Distribution Ratio on Flame Height of Flue Gas Self-Circulation Burner

Effect of Air Quantity Distribution Ratio on Flame Height of Flue Gas Self-Circulation Burner

Numerical simulation of oxy‐fuel combustion characteristics in a 200 MWe coal‐fired boiler

Synergistic Removal of SOx and NOx in CO2 Compression and Purification in Oxy-Fuel Combustion Power Plant

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Synergistic Removal of SO_x and NO_x in CO₂ Compression and Purification in Oxy-Fuel Combustion Power Plant