СПАЛЮВАННЯ ДРІБНОФРАКЦІЙНОЇ БІОМАСИ В РЕЖИМІ САМОЗАЙМАННЯ У ВИХРОВОМУ ПОТОЦІ
Biomass, when used as an alternative fuel, has practically the same disadvantages as low-quality, low-reactivity coal: the heat of combustion is low, and the moisture content can be high (more than 60%). This greatly complicates the process of burning it: it also requires preliminary drying to ensur...
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| Date: | 2023 |
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| Language: | Ukrainian |
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Institute of Engineering Thermophysics of NAS of Ukraine
2023
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| Online Access: | https://ihe.nas.gov.ua/index.php/journal/article/view/562 |
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| Journal Title: | Thermophysics and Thermal Power Engineering |
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oai:ojs2.ihenasgovua.s43.yourdomain.com.ua:article-5622024-02-13T11:20:29Z COMBUSTION OF SMALL-FRACTIONAL BIOMASS IN SELF-IGNITION MODE IN EDDY FLOW СПАЛЮВАННЯ ДРІБНОФРАКЦІЙНОЇ БІОМАСИ В РЕЖИМІ САМОЗАЙМАННЯ У ВИХРОВОМУ ПОТОЦІ Chmel, V.M. Novikova, I.P. Biomass, when used as an alternative fuel, has practically the same disadvantages as low-quality, low-reactivity coal: the heat of combustion is low, and the moisture content can be high (more than 60%). This greatly complicates the process of burning it: it also requires preliminary drying to ensure stable burning and burning of large volumes of biomass, to cover heat. As the experiments carried out at the ITTTF of the National Academy of Sciences showed, the most effective burning of fuels is in the self-ignition mode, which can be obtained by heating the fuel to the self-ignition temperature. And since when burning fuel in auto-ignition mode, the burning speed is the highest (reaches infinity), then the predominant components of the process are not kinetic, but diffusion processes The implementation of the process of burning finely fractionated biomass in the self-ignition mode is the most effective by the method of thermochemical treatment. On the basis of the conducted studies, it is shown that the dependence of the thickness of the boundary layer on the twist parameter n corresponds to the development of swirling jets - a larger opening angle of the jet and its shorter range than that of straight jets. When the twist parameter increases, the thickness of the boundary layer, correspondingly the mixing zone, increases. This corresponds to the fact that the boundary layer is a strong source of non-isotropic turbulence, which reaches 40-60%. Combustion of finely fractionated biomass in a torch showed that solid fuel in a jet of high-temperature carrier gas acts as a jet of gaseous fuel during combustion. Therefore, the organization of the combustion process in the eddy current should ensure a high-quality mixture of fuel components and high combustion efficiency of the torch of finely fractionated biomass in the eddy current in the self-ignition mode. This made it possible to create a method of burning finely fractionated solid fuel. The burning method is two-stage. In the first stage, a portion of fuel finely dispersed biomass is burned in the annular vortex flow in order to bring its residue to the self-ignition temperature, creating a heating zone. In the second stage, the remainder of the finely dispersed biomass is burned in a torch in a swirling flow of the oxidizer in the self-ignition mode. Built on its basis, the new technology of burning finely fractionated biomass in self-ignition mode will allow the creation of small-sized burner devices that can have the same dimensions as gas burner devices. Combustion devices for burning finely fractionated biomass in self-ignition mode can be used in heat generators of drying units of enterprises of the construction industry, processing of agricultural products, as well as for heating boiler rooms of heat and power systems and indust. У роботі наведені результати досліджень спалювань дрібно фракційної біомаси у вихровому потоці, з метою використання в якості альтернативного палива. Institute of Engineering Thermophysics of NAS of Ukraine 2023-10-23 Article Article application/pdf https://ihe.nas.gov.ua/index.php/journal/article/view/562 10.31472/ttpe.4.2023.11 Thermophysics and Thermal Power Engineering; Vol 45 No 4 (2023): Thermophysics and Thermal Power Engineering; 101-106 Теплофизика и Теплоэнергетика; Vol 45 No 4 (2023): Thermophysics and Thermal Power Engineering; 101-106 Теплофізика та Теплоенергетика; Vol 45 No 4 (2023): Thermophysics and Thermal Power Engineering; 101-106 2663-7235 uk https://ihe.nas.gov.ua/index.php/journal/article/view/562/485 https://creativecommons.org/licenses/by/4.0 |
| institution |
Thermophysics and Thermal Power Engineering |
| baseUrl_str |
|
| datestamp_date |
2024-02-13T11:20:29Z |
| collection |
OJS |
| language |
Ukrainian |
| format |
Article |
| author |
Chmel, V.M. Novikova, I.P. |
| spellingShingle |
Chmel, V.M. Novikova, I.P. СПАЛЮВАННЯ ДРІБНОФРАКЦІЙНОЇ БІОМАСИ В РЕЖИМІ САМОЗАЙМАННЯ У ВИХРОВОМУ ПОТОЦІ |
| author_facet |
Chmel, V.M. Novikova, I.P. |
| author_sort |
Chmel, V.M. |
| title |
СПАЛЮВАННЯ ДРІБНОФРАКЦІЙНОЇ БІОМАСИ В РЕЖИМІ САМОЗАЙМАННЯ У ВИХРОВОМУ ПОТОЦІ |
| title_short |
СПАЛЮВАННЯ ДРІБНОФРАКЦІЙНОЇ БІОМАСИ В РЕЖИМІ САМОЗАЙМАННЯ У ВИХРОВОМУ ПОТОЦІ |
| title_full |
СПАЛЮВАННЯ ДРІБНОФРАКЦІЙНОЇ БІОМАСИ В РЕЖИМІ САМОЗАЙМАННЯ У ВИХРОВОМУ ПОТОЦІ |
| title_fullStr |
СПАЛЮВАННЯ ДРІБНОФРАКЦІЙНОЇ БІОМАСИ В РЕЖИМІ САМОЗАЙМАННЯ У ВИХРОВОМУ ПОТОЦІ |
| title_full_unstemmed |
СПАЛЮВАННЯ ДРІБНОФРАКЦІЙНОЇ БІОМАСИ В РЕЖИМІ САМОЗАЙМАННЯ У ВИХРОВОМУ ПОТОЦІ |
| title_sort |
спалювання дрібнофракційної біомаси в режимі самозаймання у вихровому потоці |
| title_alt |
COMBUSTION OF SMALL-FRACTIONAL BIOMASS IN SELF-IGNITION MODE IN EDDY FLOW |
| description |
Biomass, when used as an alternative fuel, has practically the same disadvantages as low-quality, low-reactivity coal: the heat of combustion is low, and the moisture content can be high (more than 60%). This greatly complicates the process of burning it: it also requires preliminary drying to ensure stable burning and burning of large volumes of biomass, to cover heat.
As the experiments carried out at the ITTTF of the National Academy of Sciences showed, the most effective burning of fuels is in the self-ignition mode, which can be obtained by heating the fuel to the self-ignition temperature. And since when burning fuel in auto-ignition mode, the burning speed is the highest (reaches infinity), then the predominant components of the process are not kinetic, but diffusion processes
The implementation of the process of burning finely fractionated biomass in the self-ignition mode is the most effective by the method of thermochemical treatment.
On the basis of the conducted studies, it is shown that the dependence of the thickness of the boundary layer on the twist parameter n corresponds to the development of swirling jets - a larger opening angle of the jet and its shorter range than that of straight jets. When the twist parameter increases, the thickness of the boundary layer, correspondingly the mixing zone, increases. This corresponds to the fact that the boundary layer is a strong source of non-isotropic turbulence, which reaches 40-60%.
Combustion of finely fractionated biomass in a torch showed that solid fuel in a jet of high-temperature carrier gas acts as a jet of gaseous fuel during combustion. Therefore, the organization of the combustion process in the eddy current should ensure a high-quality mixture of fuel components and high combustion efficiency of the torch of finely fractionated biomass in the eddy current in the self-ignition mode. This made it possible to create a method of burning finely fractionated solid fuel.
The burning method is two-stage. In the first stage, a portion of fuel finely dispersed biomass is burned in the annular vortex flow in order to bring its residue to the self-ignition temperature, creating a heating zone. In the second stage, the remainder of the finely dispersed biomass is burned in a torch in a swirling flow of the oxidizer in the self-ignition mode.
Built on its basis, the new technology of burning finely fractionated biomass in self-ignition mode will allow the creation of small-sized burner devices that can have the same dimensions as gas burner devices.
Combustion devices for burning finely fractionated biomass in self-ignition mode can be used in heat generators of drying units of enterprises of the construction industry, processing of agricultural products, as well as for heating boiler rooms of heat and power systems and indust. |
| publisher |
Institute of Engineering Thermophysics of NAS of Ukraine |
| publishDate |
2023 |
| url |
https://ihe.nas.gov.ua/index.php/journal/article/view/562 |
| work_keys_str_mv |
AT chmelvm combustionofsmallfractionalbiomassinselfignitionmodeineddyflow AT novikovaip combustionofsmallfractionalbiomassinselfignitionmodeineddyflow AT chmelvm spalûvannâdríbnofrakcíjnoíbíomasivrežimísamozajmannâuvihrovomupotocí AT novikovaip spalûvannâdríbnofrakcíjnoíbíomasivrežimísamozajmannâuvihrovomupotocí |
| first_indexed |
2025-12-17T13:56:02Z |
| last_indexed |
2025-12-17T13:56:02Z |
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