CFD simulation of hydrodynamics on the dense zone on a 65t/h oil shale-fired high–low bed CFB boiler

A model for the combustion of oil shale in the 65t/h circulating fluidized bed (CFB) boiler was developed, consisting of oil shale combustion, steam-water and ash circulation system, calculating the O2 and RO2 content of flue gas emission under three kinds of oil shale combustion in 65t/h CFB boiler. The calculated results indicate that the simulation values are consistent with the experimental values. Effect of boiler load on the temperature of furnace, flue gas emission, inlet and outlet flue gas of economizer was discussed based on the model. Boiler load on the increase results in a increase in temperature of furnace, flue gas emission, inlet and outlet flue gas of economizer. The main performance parameters of 65t/h oil shale CFB boiler system were discussed and preliminarily predicted by the model.

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CFD Simulation of Combustion in a 150 MWe CFB Boiler

Cleaner Combustion and Sustainable World ◽

10.1007/978-3-642-30445-3_11 ◽

2012 ◽

pp. 65-67 ◽

Cited By ~ 2

Author(s):

Nan Zhang ◽

Wei Wang ◽

Jinghai Li

Keyword(s):

Cfd Simulation ◽

Cfb Boiler

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Experimental and CFD Simulation Studies on Bell-Type Air Nozzles of CFB Boilers

Applied Sciences ◽

10.3390/app9183805 ◽

2019 ◽

Vol 9 (18) ◽

pp. 3805

Author(s):

Zhong Huang ◽

Lei Deng ◽

Defu Che

Keyword(s):

Numerical Simulation ◽

Working Conditions ◽

Cfd Simulation ◽

Circulating Fluidized Bed ◽

Cold Test ◽

Structural Defects ◽

Simulation Studies ◽

Resistance Change ◽

Cfb Boiler ◽

Air Nozzle

In this paper, a new bell-type air nozzle, which overcomes the structural defects of traditional bell-type air nozzles, is proposed and validated by cold test and numerical simulation. The pressure drop characteristic of the new bell-type air nozzle is measured. Furthermore, the causes of cover outlet abrasion and blockage, inner tube fracture, and irregular resistance change in traditional bell-type air nozzles applied in circulating fluidized bed (CFB) boilers are analyzed. Then, the performance of the new bell-type air nozzle is evaluated in a real CFB boiler, which is operated under regular working conditions. The results show that the new bell-type air nozzle has stronger anti-wear ability, excellent resistance characteristics, longer service life, and easier maintenance.

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