Design Optimization of Convective Heat Transfer Surface of Pressurized Oxy-Fuel Coal-Fired Boiler

Kai Ma; Wei Ping Yan; Fei Jin; Hai Xin Li

doi:10.4028/www.scientific.net/AMR.614-615.20

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 614-615Design Optimization of Convective Heat Transfer...

Design Optimization of Convective Heat Transfer Surface of Pressurized Oxy-Fuel Coal-Fired Boiler

Abstract:

Based on the thermal calculation, the paper makes a contrastive analysis on the parameters of flue gas, and convection heat properties of the coal-fired boiler under atmospheric air combustion, atmospheric oxy-fuel combustion and pressurized (6MPa) oxy-fuel combustion conditions. It takes a 300MW pressurized(6MPa) oxy-fuel combustion boiler as research object, the result indicates that: compared to the coal-fired boiler atmospheric air combustion, the flue gas volume flow in the pressurized oxy-fuel combustion has a decrease of 98.79%; convective heat output has a decrease of 24.69% with the same difference in temperature. In the pressurized oxy-fuel combustion, both the flue gas convective heat transfer coefficient and the pressure drop are greater than the atmospheric oxy-fuel combustion, flue cross-sectional area is smaller than conventional boiler, and heating surface area is less than atmospheric oxy-fuel combustion. With a method named dynamic minimization of costs the best flue gas velocity in this paper is 1.07m/s

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Periodical:

Advanced Materials Research (Volumes 614-615)

Pages:

20-24

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.614-615.20

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Online since:

December 2012

Authors:

Kai Ma, Wei Ping Yan, Fei Jin, Hai Xin Li

Keywords:

Convective Heat Transfer, Flue Gas Velocity, Pressure Drop, Pressurized Oxy-Fuel

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