Deslagging of and biomass pellets was studied after dynamic or static addition of CaO, MgO or kaoline at 600 or 800 °C. Then the chemical element and crystal phase compositions of ashes were characterized by X-ray fluorescence and X-ray diffraction. The K and Cl concentrations declined by 10%–12% and 6%–8% respectively after the use of additives, and were both higher under dynamic addition than under static addition at the same temperature. The ashes contained some high-melting-point crystal phases (e.g. CaSiO, CaMgSiO), which can raise the melting temperature of ashes. By comparing the slagging indices between the two types of biomass ashes, we found the deslagging effect of static loading of additives was better than dynamic loading. The deslagging effect was optimized after the static loading of kaoline at 800 °C for both types of biomass. Under the condition that these research results are applied to thermal system of power plant, it can provide basis for solving slagging problem of biomass boiler.

中文翻译：

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凤眼莲和水凤生物质颗粒的除渣

在 600 或 800 °C 下动态或静态添加 CaO、MgO 或高岭土后，研究了生物质颗粒的除渣。然后通过X射线荧光和X射线衍射对灰烬的化学元素和晶相组成进行了表征。使用添加剂后，K和Cl浓度分别下降10%~12%和6%~8%，且相同温度下动态添加均高于静态添加。灰烬中含有一些高熔点晶相（如CaSiO、CaMgSiO），可以提高灰烬的熔化温度。通过比较两种生物质灰渣的排渣指数，发现静态加载添加剂的排渣效果优于动态加载。对于两种类型的生物质，在 800 °C 下静态加载高岭土后，排渣效果得到优化。这些研究成果应用于电厂热力系统的情况下，可为解决生物质锅炉结渣问题提供依据。