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分别对辣椒秆在400、600、815℃成灰灰样进行X射线荧光(X-ray fluore scence,XRF)、X射线衍射(X-ray diffraction,XRD)分析、灰熔融烧结及热重(thermo gravity,TG)试验。研究发现:不同温度成灰的形貌及元素比例均存在较大差异,成灰过程均未出现熔融结渣。但按煤质熔融特性指标进行理论计算的结果表明各温度成灰均已严重结渣,而灰熔点烧结仪试验发现各成灰温度灰样其变形、软化、半球和流动温度一致,均高于1100℃。对灰样进行TG实验,表明1100℃以后不同温度成灰的组分已一致,各温度成灰灰样含相同的起骨架支撑作用的高温熔融物质。XRF分析数据显示:随着成灰温度从400℃升高至600℃,灰样内K含量减少8.2%,Cl含量不变;当温度进一步升高至815℃,K含量减少16.6%,而Cl几乎全部析出。XRD分析表明:3个温度下灰样均含石英、铁酸钾、单钾芒硝与方镁石。400℃成灰还含方解石、碳酸钾钙石及钾盐,600℃时方解石与碳酸钾钙石消失,碳酸盐分解释放CO2,生成硅化钙,815℃成灰钾盐消失生成沸石。辣椒秆灰样的熔融特性主要取决于方镁石、石英、铁酸钾、单钾芒硝、沸石及硅化钙6种物质所生成的起骨架支撑作用的高温共融体。因此,实验中无论灰化温度为多少,其熔融特性均一致,评判辣椒秆生物质灰的真实熔融特性不应遵循煤质指标,而应从其本身所形成的共融物着手。
X-ray fluorencence (XRF), X-ray diffraction (XRD) analysis, ash fusion sintering and thermo gravimetric analysis were carried out on the pepper straw at 400, 600 and 815 ℃, gravity, TG) test. It is found that there is a big difference in morphology and element proportion of ashes at different temperatures, and no melting and slagging occurs during the ash-forming process. However, the results of the theoretical calculation based on the melting characteristics of coal showed that all ash ash had serious slagging, and ash melting sinter test found that ash ash temperature ash deformation, softening, hemispheric and flow temperature are the same 1100 ° C. The TG test of gray samples shows that the compositions of ash at different temperatures have been consistent after 1100 ℃, and the gray matter-like samples contain the same high-temperature melted materials that support the skeleton. The XRF analysis showed that the K content decreased by 8.2% and the Cl content remained unchanged as the ashing temperature increased from 400 ℃ to 600 ℃. When the temperature increased further to 815 ℃, the K content decreased by 16.6% Almost all precipitation. XRD analysis showed that all samples contained quartz, potassium ferrite, mono-glauberite and periclase at three temperatures. 400 ℃ ash also contains calcite, potash limestone and potassium salt, calcite and calcium carbonate calcite disappear at 600 ℃, carbonate decomposition release of CO2, the formation of calcium silicate, 815 ° C ash into potassium ash disappeared into zeolite. Melting properties of pepper straw dust samples mainly depend on the high-temperature co-bodies, which act as skeleton supports for the formation of six kinds of materials, namely periclase, quartz, potassium ferrite, monopotassium salt, zeolite and calcium silicate. Therefore, no matter what the ashing temperature is in the experiment, its melting characteristics are the same. The true melting characteristics of the biomass of the chili stalk should not be in accordance with the coal quality index, but should be started from the eutectic itself.