间歇精馏分离废溶剂油研究.doc

间歇精馏分离废溶剂油研究 摘 要 本文从介绍现阶段国内外废溶剂油的处理方法入题，对间歇精馏分离技术的特点进行了评述，主要从间歇精馏回流比等影响因素阐述了操作参数变化对回收率的影响。针对油漆、和机械加工等行业产生的废溶剂油，实验研究了用间歇精馏法回收废溶剂油中的二甲苯和乙酸丁酯。对废油进行预处理，结果表明：废油中的大部分都可以简单蒸馏出来。对预处理后的原料进行了间歇精馏实验研究，结果表明：回流比变化对废溶剂油中主要组分的回收率有较大影响，当R=4时，乙酸丁酯和二甲苯的高浓度回收率都较高，质量浓度达0.8以上的乙酸丁酯的回收率为53.76%，质量浓度达到0.9以上的二甲苯的回收率为38.11%，同时质量浓度在0.95以上的二甲苯回收率为31.44%，这表明该回流比下有利于产品的回收。 关键词：间歇精馏；二甲苯；乙酸丁酯 Batch Distillation Separation of waste solvent oil Abstract This paper describes current domestic oil processing spend solvents into the question of the characteristics of batch distillation separation techniques were reviewed, mainly from the batch distillation reflux ratio and other factors described on the recovery of operating parameters. For the paint, and mechanical processing industries generate spend solvent oil, experimental study of the batch distillation process for recovery of used oil in spend solvents xylene and butyl acetate. Pretreatment of the spend oil, the results showed that: most of the waste oil can be simply distilled. After the pretreatment of raw materials were batch distillation experimented. The results showed that: reflux ratio changes on the main components of waste solvent oil recovery rate has greatly influenced, when R = 4, the high-butyl acetate and xylene concentration of recovery are high concentrations of butyl acetate above 0.8 the recovery was 53.76%, the concentration of more than 0.9 xylene recovery was 38.11%, while the concentration of xylene in the recovery of more than 0.95 was 31.44%, indicating that the reflux ratio is conducive to product recovery. Keywords：Batch distillation；Xylene； Butyl acetate 目 录 第一章 引言 1 1.1 选题的背景、目的和意义 1 1.2研究方法和预期结果 1 1.3 分离方法的提出 2 1.3.1 间歇精馏 2 1.3.2 废溶剂油的组成及各组分的物理性质 2 第二章 间歇精馏回收二甲苯/乙酸丁酯工艺研究 3 2.1实验设备与原料 3 2.1.1实验设备 3 2.1.2试剂原料 3 2.2 废溶剂油预处理实验步骤 4 2.2.1实验前准备 4 2.2.2预处理蒸馏 4 2.3精馏实验装置及实验过程 4 2.3.1 实验装置 4 2.3.2 实验步骤与操作 5 2.3.3 实验中的现象及过程特征 6 2.4 检测仪器和分析方法 6 2.4.1 检测仪器 6 2.4.2分析方法 6 2.5 实验结果与数据处理 8 2.5.1 R=