低挥发分水煤浆的制备及燃烧特性研究 |
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引用本文: | 黄波,解维伟,朱书全,楚天成,王雅佳. 低挥发分水煤浆的制备及燃烧特性研究[J]. 矿业科学学报, 2016, 1(1): 82-88 |
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作者姓名: | 黄波 解维伟 朱书全 楚天成 王雅佳 |
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作者单位: | 中国矿业大学(北京)化学与环境工程学院,北京100083 |
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基金项目: | 国家重点基础研究发展计划(973计划)(2012CB214901) |
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摘 要: | 本文通过干法制浆研究了潞安低挥发分贫煤的成浆性,通过热重分析和燃烧试验研究了低挥发分水煤浆的燃烧特性。研究结果表明:屯留原煤、屯留煤泥、常村原煤和常村煤泥的成浆性很好,可制备出浓度高达72%、表观黏度小于1 200 mPa·s的水煤浆。水煤浆的热重试验和燃烧试验表明:常村低挥发分贫煤水煤浆的着火温度较高,综合燃烧特性指数低于高挥发分水煤浆;在相同的升温速率下,低挥发分水煤浆的活化能高于高挥发分的水煤浆,灰渣沉积速率远低于高挥发分水煤浆的灰渣沉积速率,结渣不严重;10 t/h锅炉上连续燃烧常村煤泥水煤浆时,火焰明亮、稳定,炉膛充满度高,炉膛温度均匀;无任何闪烁火星出现,达到了很高的燃尽率,燃烧热效率高达86.93%。
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关 键 词: | 低挥发分水煤浆 成浆性 流变特性 燃烧特性 热重分析 |
收稿时间: | 2016-04-25 |
A study of low volatile coal water slurry-preparation and combustion |
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Affiliation: | School of Chemical and Environmental Engineering,China University of Mining and Technology,Beijing,100083,China |
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Abstract: | This exploratory work focused on the preparation of coal water slurry from low volatile coal and its combustion characteristics. Sample of raw coal and coal slime (Tunliu&Changcun, Luan Ltd, Shanxi, CN) were ground and prepared into high concentration coal water slurry (CWS), which could be up to 72% and the apparent viscosity was less than 1 200 mPa·s, showing a good slurryability of the sample. Then thermo gravimetric analysis (TGA) and combustion test were conducted and the result showed that sample from Changcun had a comparatively higher ignition temperature, while a lower combined combustion characteristic index compared to the high volatile CWS. Under the same heating rate, a higher activation energy was required for low volatile CWS, while its ash deposition rate was well below that of high volatile CWS. When combusted continuously in a 10t/h industry boiler under the condition of national emission standards, the Changcun CWS was well distributed in the furnace with a uniform temperature, a bright, stable and sparkless flame, and the burn-out rate was high with a combustion thermal efficiency of 86.93%. |
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