3d Modeling of Heat Transfer Processes in the Combustion Chamber Boiler of Thermal Power Plants

Аскарова, А.С.; Šafařík, Pavel; Максимов, В. А.; Nugymanova, Aizhan; Bolegenova, S.А.

doi:10.32014/2019.2518-1726.68

Cited by 2 publications

(2 citation statements)

References 16 publications

(16 reference statements)

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“…A steam boiler with a capacity of 75 t/h burns high-ash Karaganda coal (ash content 35.10%), is equipped with four pulverized coal burners, two burners from the front and from the rear in one tier. A more detailed description of the boiler combustion chamber, mathematical model, solution method, application package is given in the following works [19][20][21][22][23][24][25][26]. The general view of the combustion chamber of the BKZ-75 boiler (figure 1a) and the arrangement of burners and injectors for the implementation of the technology of two-stage fuel combustion (figure 1b) is shown in figure 1a [27][28].…”

Section: Description Of the Combustion Chamber For Conducting Computamentioning

confidence: 99%

Use of Two-Stage Fuel Combustion Technology to Minimize Hazardous Emissions at Kazakhstan TPP

Аскарова¹,

Šafařík²,

Bolegenova³

et al. 2021

News of NAS RK. SPh-M

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Studies have been carried out using numerical modeling methods to determine the effect of the introduction of a two-stage combustion technology (OFA technology) of high-ash Karaganda coal on the characteristics of combustion processes: aerodynamics of flows, temperature and concentration (COх, NOх) fields throughout the entire volume of the combustion chamber of the BKZ-75 boiler at Shakhtinskaya TPP and at the outlet from it. Comparison with the basic regime of combustion of pulverized coal fuel, when there is no air supply through additional injectors (OFA = 0%). To implement the technology of two-stage combustion, various regimes of additional air supply through injectors were chosen: OFA equals 0% (basic version, conventional combustion), 5%, 10%, 15%, 18%, 20%, 25% and 30% of total air volume required for fuel combustion. A comparative analysis of the main characteristics of the heat and mass transfer process in the combustion chamber for the investigated modes is carried out. It is shown that an increase in the volume of additional air supplied through the injectors up to 18% leads to a decrease in the concentration of nitrogen oxide NO by 25% in comparison with traditional combustion. A further increase in the volume of additional air leads to a deterioration in these indicators. The results obtained will make it possible to optimize the combustion of low-grade fuel in the combustion chamber of the BKZ-75 boiler, increase the efficiency of fuel burnout, reduce harmful emissions and introduce a two-stage combustion technology at other coal-fired TPPs.

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Section: Description Of the Combustion Chamber For Conducting Computamentioning

confidence: 99%

Use of Two-Stage Fuel Combustion Technology to Minimize Hazardous Emissions at Kazakhstan TPP

Аскарова¹,

Šafařík²,

Bolegenova³

et al. 2021

News of NAS RK. SPh-M

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show abstract

“…For carrying out computational experiments, the boiler combustion chamber was chosen, which is equipped with four dust-coal burners installed two burners from the front and from the rear in one tier [24][25]. Below are a general view of the combustion chamber of the BKZ-75 boiler (figure 1a), its breakdown into control volumes for numerical simulation (figure 1b) and the design of burners (figure 1 c, d).…”

Section: Physical Statement Of the Problemmentioning

confidence: 99%

Numerical Simulation of Heat and Mass Transfer at the Partial Stop of Fuel Supplying in the Chamber of TPP

Šafařík¹,

Bolegenova²,

Tuyakbaev³

et al. 2020

OF THE NATIONAL ACADEMY OFSCIENCES OF THE REPUBLIC OF KAZAKHSTA

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3d Modeling of Heat Transfer Processes in the Combustion Chamber Boiler of Thermal Power Plants

Cited by 2 publications

References 16 publications

Use of Two-Stage Fuel Combustion Technology to Minimize Hazardous Emissions at Kazakhstan TPP

Use of Two-Stage Fuel Combustion Technology to Minimize Hazardous Emissions at Kazakhstan TPP

Numerical Simulation of Heat and Mass Transfer at the Partial Stop of Fuel Supplying in the Chamber of TPP

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