3D-modelling of Kazakhstan low-grade coal burning in power boilers of thermal power plant with application of plasma gasification and stabilization technologies

Мессерле, В. Е.; Аскарова, А.С.; Bolegenova, S.А.; Maximov, V.; Nugymanova, Aizhan

doi:10.1088/1742-6596/1261/1/012022

Cited by 9 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The energy of turbulence k The aforementioned system of eq. 1is solved numerically using the control volume method, which is described in detail in [27,[35][36][37][38][39][40][41][42] and later it was used when conducting computational experiments on the burning of high-ash coal at Kazakhstan's thermal power plants.…”

Section: Modelling Of Coal Combustionmentioning

confidence: 99%

3-D modelling of heat and mass transfer during combustion of low-grade coal

et al. 2020

View full text Add to dashboard Cite

Using numerical methods, the basic characteristics of heat and mass transfer processes in the furnace chamber of the BKZ-75 boiler of the Shakhtinskaya TPP (Kazakhstan) were studied during a forced partial stop of the supply of coal dust through the burners. Two modes of fuel supply were studied; a direct-flow method of supplying air mixtures, when two direct-flow burners are working and two are in emergency mode and vortex method of supplying air mixtures-two vortex burners with a swirl angle of the air mixture flow and their inclination the center of symmetry of the boiler by 30° and two are in emergency mode. The computational experiments allowed to obtain the distributions of the total velocity vector, temperature fields, concentration fields of CO, NO 2 throughout the entire volume of the combustion chamber and conduct a comparative analysis for the two investigated emergency mode (direct-flow and vortex). Based on the results, it can be concluded that in the case of a forced partial stop of the supply of coal dust, the use of the vortex method of supplying air mixtures improves heat and mass transfer processes and allows minimizing emissions of harmful substances.

show abstract

Section: Modelling Of Coal Combustionmentioning

confidence: 99%

3-D modelling of heat and mass transfer during combustion of low-grade coal

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In this work, a new way of performing the combustion process of high-ash coal in combustion chambers of operating thermal power plants by using plasma-fuel systems (PFS) was studied [3,4]. Plasma thermochemical preparation of coal for combustion consists of heating a pulverized-coal mixture by a plasma torch with an oxygen deficiency in a special chamber to a temperature exceeding the self-ignition temperature of the coal.…”

Section: Introductionmentioning

confidence: 99%

Using Plasma Activation to Optimize the Combustion Process and Minimize Harmful Emissions

et al. 2021

View full text Add to dashboard Cite

The possibility of introducing plasma ignition of fuel in combustion chambers of power boilers was investigated by using 3D computer modeling methods. Computational experiments were carried out on operating boilers, and a comparison of the characteristics of the combustion process for traditional fuel combustion and its thermochemical variant was carried out. Plasma technology allows the concentration of carbon and nitrogen oxides at the outlet of the furnace to be reduced. The results obtained showed the efficiency of thermochemical plasma activation of fuel and the possibility of its application in real heat and power facilities to optimize combustion processes and minimize harmful emissions.

show abstract

“…The application of plasma-assisted combustion for the coal industry was further developed to utilize coal for start-ups and concurrently to increase the combustion stability and fuel flexibility. In plasma-assisted ignition and combustion the coal particles undergo a thermochemical activation and consequently are ignited with the help of plasma, eliminating the need for gas and oil for the start-up [8,9]. Thermochemical plasma preparation of a portion of the coal stream produces a partially gasified coal flow, which is used to ignite the main pulverized fuel flow.…”

Section: Introductionmentioning

confidence: 99%

Pilot-Scale Experiences on a Plasma Ignition System for Pulverized Fuels

2021

View full text Add to dashboard Cite

The need for flexible power generation is growing worldwide as the energy transition is altering the operational regimes of thermal power plants. Plasma ignition systems, as an alternative technology to the conventional start-up method with natural gas or oil firing, offer a cost- and energy-efficient start-up process in pulverized fuel power stations. The application of plasma ignition systems for cold start-ups using different qualities of pre-dried lignite is investigated in a pilot-scale combustion facility. A plasma integrated swirl burner is developed and validated using highly ignitable lignite dust. Eight pre-dried lignite qualities with a moisture content of up to 30% and a broad particle size distribution are investigated for this application to determine the applicability and limitations of the plasma ignition system with regard to the fuel quality. The performance of lignites for cold start-up in the plasma ignition system are categorized based on their ignition and combustion performance. All lignite qualities were ignited under the cold-start-up condition with a plasma power of 4 kW to 7 kW. Lignite qualities with a moisture content of up to 20% and a median particle size of below 450 μm form a self-sustained flame with short-time plasma-supported combustion, while flame blow-out is observed for lignites with lower qualities.

show abstract

3D-modelling of Kazakhstan low-grade coal burning in power boilers of thermal power plant with application of plasma gasification and stabilization technologies

Cited by 9 publications

References 7 publications

3-D modelling of heat and mass transfer during combustion of low-grade coal

3-D modelling of heat and mass transfer during combustion of low-grade coal

Using Plasma Activation to Optimize the Combustion Process and Minimize Harmful Emissions

Pilot-Scale Experiences on a Plasma Ignition System for Pulverized Fuels

Contact Info

Product

Resources

About