毕业设计----年处理20万t酮苯脱蜡水回收系统的工艺设计

1、 - I - 年处理 20 万 t 酮苯脱蜡水回收系统的工艺设计 摘要：酮苯脱蜡是润滑油生产中的一道重要工序，其生产过程一般使用丁酮和甲苯作为溶剂。溶剂在经过油 回收系统、蜡回收系统后，已被大量回收，在回收过程中由于使用了水蒸汽直接汽提的方法，所以水中含有少量的 溶剂丁酮。本设计就是针对酮苯脱蜡装置溶剂回收中的溶剂脱水（干燥）工艺过程进行设计的。由于丁酮-水体系属 于非均相共沸体系，所以一般精馏过程不能实现其分离，为实现组分分离一般采用共沸精馏。非均相共沸精馏基本 流程是利用双塔实现分离，同时借助分离器将溶液分层，上下两层分别进入不同的塔。其中酮塔完成丁酮的提浓， 水塔完成丁酮的回收，并使塔底

2、排放水达标。主要完成了以下工作： 1）共沸精馏用到的酮塔和水塔的塔高、塔径、塔板布置等的设计； 2）水收系统所需换热器、泵的计算及选型； 3）精馏塔的强度计算； 4）厂房布置和人员组织。 关键词：酮苯脱蜡，丁酮，水，溶剂回收，强度计算 - II - Process design of recycling water on ketone-benzol dewaxing 200,000t/a Abstract: Ketone-benzol dewaxing is an important process of lubricating oil production. The butanone and

3、 toluene are used as asolvent in the production process generally. After oil recovery system and wax recovery system, solvent has been recycled mainly. The water vapor stripping method is used in the recycling process, so the water contains a little butanone. The purpose of this design is to accompl

4、ish solvent dehydration technology process. Because butanone-water system belongs to azeotropic heterogeneous system, this design chooses azeotropic distillation to make butanone and water separate. The azeotropic distillation process contains two towers and a device layered. The mission of one tower is to achieve concentration of butanone and another is to achieve butanone recovery. At the same time, the water from column bottom reaches the standard. This design mainly completes the follow