关键词: CO2 emissions Cement industry Energy sources Resource recovery SRF production Sewage sludge

Mesh : Carbon Dioxide Chlorine Coal Incineration Lithuania Mercury Natural Resources Pilot Projects Refuse Disposal Sewage Solid Waste / analysis

来  源:   DOI:10.1007/s11356-022-20793-y

Abstract:
This pilot study aimed to develop a production line for SRF production from RDF by extracting prohibited materials, grinding, and drying, and the energy potential for using SRF in the cement industry as an alternative fuel was evaluated. This paper defined the main characteristics of RDF, which were obtained after the separation of the biological fraction from MSW at an MBT plant. According to its characteristics, RDF can only be used for incineration in the CPP to obtain heat and energy. The produced SRF meets the requirements for fuel from waste and can be used as an alternative fuel for clinker firing. A technological process line for SRF production from RDF has been developed by adding technical units to the existing MBT line. The SRF production line yield was calculated as 4.47 t/h. At the end of the SRF production process, the moisture content of the finished product decreased by 85%, and the volume decreased by 18%. The obtained SRF had a high calorific value, low moisture content, and a permissible value of chlorine and mercury. It was proposed that the produced SRF and sewage sludge (already used during the clinker firing process) be utilized as alternative fuels since they correspond to the oxide composition of the finished clinker in elemental and oxide composition. A calculation to assess the economic and environmental efficiency of the use of SRF in the cement kiln was conducted. The result showed that using 10% SRF as a substitute fuel for coal used in clinker roasting at 1.92 t/h would save 601.7 USD/h coal costs. This use of SRF will emit 3.7 t/h CO2 and achieve net savings of 754.7 USD/h.
摘要:
本试验研究旨在通过提取违禁材料,开发一条从RDF生产SRF的生产线,研磨,和干燥,并评估了在水泥工业中使用SRF作为替代燃料的能源潜力。本文定义了RDF的主要特点,在MBT工厂从MSW中分离生物部分后获得。根据其特点,RDF只能用于在CPP中进行焚烧以获得热量和能量。所产生的SRF满足来自废物的燃料的要求并且可以用作熟料燃烧的替代燃料。通过在现有的MBT生产线上增加技术单元,开发了从RDF生产SRF的工艺流程线。SRF生产线产率计算为4.47t/h。在SRF生产过程结束时,成品的水分含量下降了85%,数量减少了18%。得到的SRF热值高,低水分含量,以及氯和汞的允许值。有人提出将产生的SRF和污水污泥(已经在熟料燃烧过程中使用)用作替代燃料,因为它们对应于最终熟料的元素和氧化物组成的氧化物组成。进行了评估在水泥窑中使用SRF的经济和环境效率的计算。结果表明,使用10%SRF作为1.92t/h熟料焙烧所用煤的替代燃料,可节省601.7USD/h的煤炭成本。使用SRF将排放3.7t/h的二氧化碳,净节省754.7美元/小时。
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