The EU’s circular economy concept necessitates increasing the recycling ratio of municipal solid wastes. There are many existing mechanical–biological processing plants in Hungary for the preparation of residual municipal solid wastes (RMSWs). The two most important products of these plants are the bio-fraction and the refuse derived fuel (RDF). Currently, there are problems with both of these material streams in Hungary, since most of the bio-fraction is still landfilled, and the local thermal utilisation of the RDF has not been implemented yet. The high moisture content of the produced bio-fraction and RDF causes difficulties for the downstream operations; therefore, there is recent engineering interest in drying and agglomeration of these materials. The authors have carried out systematic and parallel drying and briquetting experimental series to study the effect of the material, material composition, mass (volume or surface) of the material, particle size distribution and pre-treatment with a cutting mill on drying intensity in a 1 m3 oven and their effect on briquettability by a laboratory briquette press. The initial slope of the relative moisture loss as function of time was determined. Process engineering design methods of convective hot air-drying can be further developed taking into account the research results. Results can be used for the design of the feed of a pyrolysis reactor once reactor experiments have provided the optimal feed requirements.

中文翻译：

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用于开发热解反应器进料的生物分馏和垃圾衍生燃料的基本干燥和团聚实验

欧盟的循环经济理念要求提高城市固体废物的回收率。匈牙利现有许多机械生物加工厂用于处理残余城市固体废物（RMSW）。这些工厂的两种最重要的产品是生物馏分和垃圾衍生燃料（RDF）。目前，匈牙利这两种物料流都存在问题，因为大部分生物馏分仍被填埋，且 RDF 的当地热利用尚未实施。生产的生物馏分和RDF水分含量高，给下游操作带来困难；因此，最近工程界对这些材料的干燥和团聚产生了兴趣。作者进行了系统、平行的干燥和压块实验系列，研究了材料、材料成分、材料质量（体积或表面积）、粒度分布和切割机预处理对干燥强度的影响。 1米3烤箱及其对实验室压块机压块性的影响。确定相对水分损失随时间变化的初始斜率。结合研究成果，可以进一步发展对流热风干燥的工艺工程设计方法。一旦反应器实验提供了最佳进料要求，结果即可用于热解反应器进料的设计。