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首页> 外文期刊>Fuel Processing Technology >Ash deposition during pressurized oxy-fuel combustion of Zhundong coal in a lab-scale fluidized bed
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Ash deposition during pressurized oxy-fuel combustion of Zhundong coal in a lab-scale fluidized bed

机译：抗煤煤加压氧燃烧过程中的灰沉积在实验室规模流化床中

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The paper presents the ash deposition behavior during pressurized oxy-fuel fluidized bed combustion (POFBC) of Zhundong coal at 0.3 MPa, which has never been reported before. Ash deposits collected from different positions (windward, leeward and vertical sides) of the probe under different atmospheres were investigated in detail. The results showed that the inside deposits, i.e. the initial deposit layers, on the different positions shared the similar composition and morphology. However, the atmosphere had a significant impact on the ash deposition behavior. The inside deposits have more regular spheres and larger size under 30% O-2/70% CO2 condition than those from 21% O-2/79% N-2 and 21% O-2/79% CO2 combustion, probably due to the intensive submicron particle coagulation. Furthermore, the particles contained in the inside deposits had higher Fe and Cl in 30% O-2/70% CO2 combustion compared with that in the other two combustion modes. However, the content of S in the deposits was the highest under 21% O-2/79% CO2 condition, which may be attributed to the fact that high CO2 partial pressure strengthens self-desulfurization ability of ash. In addition, S and Si contributed significantly to the compositions of the inside deposits.
机译：本文在0.3MPa的0.3MPa下，对抗煤加压氧气流化床燃烧（POFBC）的灰沉积行为呈现为0.3MPa，从未报道过。详细研究了从不同的环境下的探针的不同位置（迎风，背风和垂直侧）收集的灰分沉积。结果表明，内部沉积物，即初始沉积层，在不同的位置分享了类似的组成和形态。然而，大气对灰分沉积行为产生显着影响。内部沉积物具有比来自21％O-2/79％N-2和21％O-2/79％CO 2燃烧的30％O-2/70％的CO 2条件下的常规球体和更大的尺寸。可能是由于密集的亚微米粒子凝血。此外，与其他两种燃烧模式相比，内部沉积物中含有的颗粒具有更高的Fe和Cl，其中30％O-2/70％CO 2燃烧。然而，沉积物中的S含量在21％的O-2/79％CO 2条件下最高，这可能归因于高CO2部分压力增强灰分的自脱硫能力。此外，S和SI对内部沉积物的组成显着贡献。

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