Experimental Study on Single-Particle Combustion Characteristics of Large-Sized Wheat Straw in a Drop Tube Furnace
Co-firing large-sized straw biomass in pulverized coal boilers is a potential pathway for carbon emission reduction in China’s thermal power plants. However, experimental data on large-sized straw combustion under pulverized coal boiler combustion conditions are critically lacking. This study select...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/18/15/3968 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849766036377698304 |
|---|---|
| author | Haoteng Zhang Lihui Yu Cuina Qin Shuo Jiang Chunjiang Yu |
| author_facet | Haoteng Zhang Lihui Yu Cuina Qin Shuo Jiang Chunjiang Yu |
| author_sort | Haoteng Zhang |
| collection | DOAJ |
| description | Co-firing large-sized straw biomass in pulverized coal boilers is a potential pathway for carbon emission reduction in China’s thermal power plants. However, experimental data on large-sized straw combustion under pulverized coal boiler combustion conditions are critically lacking. This study selected typical large-sized wheat straw particles. Employing a two-mode experimental setup in a drop tube furnace (DTF) system simulating pulverized coal boiler conditions, we systematically investigated the combustion behavior and alkali metal release characteristics of this large-sized straw biomass, with combustion processes summarized for diverse particle types. The findings reveal asynchronous combustion progression across particle surfaces due to heterogeneous mass transfer and gas diffusion; unique behaviors distinct from denser woody biomass, including bending deformation, fiber branching, and fragmentation, occur; significant and morphology-specific deformations occur during devolatilization; fragmentation universally produces particles of varied shapes (needle-like, flaky, blocky, semi-tubular) during char combustion; and potassium release exceeds 35% after complete devolatilization and surpasses 50% at a burnout degree exceeding 80%. This work provides essential experimental data on the fundamental combustion characteristics and alkali metal release of large-sized wheat straw particles under pulverized coal boiler combustion conditions, offering engineering application guidance for the direct co-firing of large-sized flexible straw biomass in pulverized coal boilers. |
| format | Article |
| id | doaj-art-a047a0fc81e44e64b1f71b1e06e30637 |
| institution | DOAJ |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-a047a0fc81e44e64b1f71b1e06e306372025-08-20T03:04:42ZengMDPI AGEnergies1996-10732025-07-011815396810.3390/en18153968Experimental Study on Single-Particle Combustion Characteristics of Large-Sized Wheat Straw in a Drop Tube FurnaceHaoteng Zhang0Lihui Yu1Cuina Qin2Shuo Jiang3Chunjiang Yu4State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310058, ChinaState Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310058, ChinaState Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310058, ChinaState Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310058, ChinaState Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310058, ChinaCo-firing large-sized straw biomass in pulverized coal boilers is a potential pathway for carbon emission reduction in China’s thermal power plants. However, experimental data on large-sized straw combustion under pulverized coal boiler combustion conditions are critically lacking. This study selected typical large-sized wheat straw particles. Employing a two-mode experimental setup in a drop tube furnace (DTF) system simulating pulverized coal boiler conditions, we systematically investigated the combustion behavior and alkali metal release characteristics of this large-sized straw biomass, with combustion processes summarized for diverse particle types. The findings reveal asynchronous combustion progression across particle surfaces due to heterogeneous mass transfer and gas diffusion; unique behaviors distinct from denser woody biomass, including bending deformation, fiber branching, and fragmentation, occur; significant and morphology-specific deformations occur during devolatilization; fragmentation universally produces particles of varied shapes (needle-like, flaky, blocky, semi-tubular) during char combustion; and potassium release exceeds 35% after complete devolatilization and surpasses 50% at a burnout degree exceeding 80%. This work provides essential experimental data on the fundamental combustion characteristics and alkali metal release of large-sized wheat straw particles under pulverized coal boiler combustion conditions, offering engineering application guidance for the direct co-firing of large-sized flexible straw biomass in pulverized coal boilers.https://www.mdpi.com/1996-1073/18/15/3968drop tube furnacelarge-sizedwheat strawcombustion processpotassium |
| spellingShingle | Haoteng Zhang Lihui Yu Cuina Qin Shuo Jiang Chunjiang Yu Experimental Study on Single-Particle Combustion Characteristics of Large-Sized Wheat Straw in a Drop Tube Furnace Energies drop tube furnace large-sized wheat straw combustion process potassium |
| title | Experimental Study on Single-Particle Combustion Characteristics of Large-Sized Wheat Straw in a Drop Tube Furnace |
| title_full | Experimental Study on Single-Particle Combustion Characteristics of Large-Sized Wheat Straw in a Drop Tube Furnace |
| title_fullStr | Experimental Study on Single-Particle Combustion Characteristics of Large-Sized Wheat Straw in a Drop Tube Furnace |
| title_full_unstemmed | Experimental Study on Single-Particle Combustion Characteristics of Large-Sized Wheat Straw in a Drop Tube Furnace |
| title_short | Experimental Study on Single-Particle Combustion Characteristics of Large-Sized Wheat Straw in a Drop Tube Furnace |
| title_sort | experimental study on single particle combustion characteristics of large sized wheat straw in a drop tube furnace |
| topic | drop tube furnace large-sized wheat straw combustion process potassium |
| url | https://www.mdpi.com/1996-1073/18/15/3968 |
| work_keys_str_mv | AT haotengzhang experimentalstudyonsingleparticlecombustioncharacteristicsoflargesizedwheatstrawinadroptubefurnace AT lihuiyu experimentalstudyonsingleparticlecombustioncharacteristicsoflargesizedwheatstrawinadroptubefurnace AT cuinaqin experimentalstudyonsingleparticlecombustioncharacteristicsoflargesizedwheatstrawinadroptubefurnace AT shuojiang experimentalstudyonsingleparticlecombustioncharacteristicsoflargesizedwheatstrawinadroptubefurnace AT chunjiangyu experimentalstudyonsingleparticlecombustioncharacteristicsoflargesizedwheatstrawinadroptubefurnace |