Email this article The influence of the initial moisture content of cedar needles on the time characteristics of the ignition of coal-water suspensions
- Authors: Malyshev D.Y.1, Kostoreva Z.A.1, Tamashevich M.S.1, Poznakharev A.S.1
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Affiliations:
- National Research Tomsk Polytechnic University
- Issue: No 3 (2024)
- Pages: 32-39
- Section: Articles
- URL: https://rjmseer.com/0023-1177/article/view/677492
- DOI: https://doi.org/10.31857/S0023117724030055
- EDN: https://elibrary.ru/NCDQFV
- ID: 677492
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Fig. 1. Schematic diagram of an experimental biomass dehumidification plant (1 – stainless steel working chamber, 2 – heating element, 3 – pan with cedar needles, 4 – drying cabinet control unit, 5 – electronic scales, 6 – personal computer).
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Fig. 2. Diagram of an experimental installation for determining the ignition delay times of coal–water suspensions (1 – metal holder, 2 – WUS drop, 3 – furnace control unit, 4 – high–temperature furnace, 5 – movable platform, 6 – high-speed chamber, 7 - guide rails of the movable platform, 8 - exhaust ventilation).
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Fig. 3. The main stages of ignition and combustion of a coal-water suspension (46% coal, 4% fresh cedar needles, 50% water) with a characteristic initial size of 3 mm in a high-temperature environment (Tg = 1273 K).Gorenje et al.
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Fig. 4. dependence of the ignition timing of coal – fired fuels on the temperature of the oxidizing medium at different humidity of the plant component (1 – natural, 2 – dry) and different mass concentrations (1 – 50% water, 50% coal grade D, a – 50% water, 48% coal grade D, 2% cedar needles, B – 50% water, 46% coal grade D, 4% cedar needles, B-50% water, 44% charcoal grade D, 6% cedar needles).
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Fig. 5. The dependence of the ignition delay time on the characteristic size of the VUT droplet (50% water, 46% coal, 6% cedar needles), at different needle grinding tones (Tg = 1073 K).
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Fig. 6. Dependence of changes in the weight of cedar needles (a – freshly cut, b – fallen) from the time spent in the drying cabinet t at a temperature of 373 K.
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Fig. 7. Dependence of the change in the dimensionless mass M of cedar needles (1 – freshly cut, 2 – fallen) from the dimensionless time spent in the drying cabinet t at a temperature of 373 K.
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Fig. 8. Dependence of the speed (a) and power (b) spent on drying cedar needles (1 – freshly cut, 2 – fallen) from the time spent in the drying cabinet t at a temperature of 373 K.
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