System Analysis on RDF Production from Municipal Solid Waste

1. RDF装置的物质平衡、能量产出和成本估算：1）根据运行数据和作者的调查，在组分基础上估算了RDF装置的物质平衡; 2）能量分析技术定义的能量产出系数对3个RDF装置均为正值。另外两个工厂的垃圾干燥效率和工厂的工作率可以得到改善。3）RDF生产的总成本，运营成本和建设成本之和，对于一个中等规模的工厂为10 t/d，每吨投入垃圾为3 - 5万日元。环境影响RDF和焚烧残渣中的重金属含量分别低于未处理的可燃废物和垃圾焚烧残渣。两者均符合堆填区标准。燃烧时，采用简单的旋风分离器装置，废气符合标准.模型模拟1）在三种情况下模拟用于RDF生产的垃圾：2）垃圾中塑料含量较高，导致RDF中挥发性氯含量较高，因此在RDF处理前至少应排除50%的塑料，以避免锅炉腐蚀问题; 3）RDF生产成本主要取决于工厂规模，对垃圾分类技术的依赖较小。4）RDF中塑料含量较少，将能量产出降至零。因此，塑料含量较高是有利的，但需要除氯装置。5）总结了可能的能源使用。

1. Mass balance, enegy yield, and cost estimation of RDF plant.1) Mass balance was estimated on composition base by using operation data and author's survey.2) Energy yield coefficient, defined by energy analysis technique, are positive for three RDF plants. Those for other two plants could be improved if the drying efficiency of refuse and the working ratio of the plant were improved.3) The total cost of RDF production, the sum of operation cost and construction cost, is 30-50 thousand yen per ton of input refuse for a midium size plant as 10t/d.2. Environmental impactHeavy metal contents in RDF,and in burned residue are less than those in unprocessed combustible waste, and in waste incineration residue, respectively. Both are satisfactory to landfilling criteria. When burned, effluent gas meets criteria with simple cyclon device.3. Model simulation1) Refuse for RDF production was simulated in three scinario : combustible waste, waste excluding food waste, and waste excluding plastics.2) Higher plastic content in input refuse leads higher volatile chlorine contents in RDF.So at least 50% of plastic should be excluded before the RDF processing to avoid the boiler corrosion problem.3) RDF production cost depends mainly on the scale of plant, depends less on the refuse sorting scinario.4) Less content of plastica in RDF reduces the energy yield to zero. So higher plastic content is favorable though chlorine removal device is required.5) Possible energy use were summarized.