Development of Flame Jet Recycling System

为了确定火焰喷射循环系统（Flame Jet Recycling System，FJRS）的基本处理能力，为设计处理池和系统各组成部分的最佳组合提供依据，利用实验系统对三种污泥废弃物（氢氧化铝污泥、污水污泥和原油污泥）进行了处理，以回收其中的物质进行循环利用。通过对实验结果的热效率和容积传热系数（VHTC）等参数分析，得出以下结论：1）由于废气排放到大气中，没有回收热量，热效率较低。在实际装置中，必须回收废气的热量。2）容积传热系数的最大值为800（kcal/m^<*>3/h/C）。为了获得较大的VHTC，如果产品的含水量足够低，则推荐较低的加工温度。3）当喷嘴出口与加工罐底部之间的距离较短时，获得了良好的热效率。这被认为是由于处理槽底部周围的强循环引起的。4）加工成本不足以低到仅通过销售产品来提高利润。当处置费用预期时，该系统是可行的。

The purpose of this study is to find the fundamental processing capacity of Flame Jet Recycling System (FJRS), which makes it possible to design the process tank and to find the optimum combination of each system component.Three kinds of sludge wastes, aluminum hydroxide sludge, sewage sludge and crude oil sludge, were processed by a experimental system to recover the material for recycling use. The experimental results were analyzed by the parameters of thermal efficiency and volumetric heat transfer coefficient (VHTC).The following results were obtained.1) The thermal efficiency was rather low, for the exhaust gas was emitted to the atmosphere from the plant without recovering the heat. The heat of the exhaust gas must be recovered in a practical plant.2) The maximum value of the volumetric heat transfer coefficient was 800 (kcal/m^<****>3/h/C). In order to obtain the large VHTC,the low processing temperature is recommended, if the water dontent of the product is sufficiently low.3) A good thermal efficiency was obtained when the distance between nozzle exit and the bottom of the process tank was short. This was considered to be caused by a strong circulation around the bottom of the process tank.4) The processing cost is not low enough to raise a profit by only selling the product. This system is feasible when the disposal fee is expected.