7.3万吨年粗苯加氢精制工艺设计

目录AbstractThe main task of this design is to design the crude benzene hydrofining processwith a processing capacity of 73,000 tons/year.The process flow of solventextraction and low-temperature hydrofining is adopted.For this reason,the chemicalequipment of continuous distillation sieve plate column is selected.By separating the light and heavy components in the two benzene towers,the recovered heavy benzene is operated in the tower kettle,and the hydrogenation reaction is used to remove the hydrogen sulfide and ammonia gas from the light benzene raw materials,and the process products are continuously passed into Among the pre-rectification tower,extractive distillation tower pure benzene tower and xylene tower,after the above operations,the crude benzene raw material was purified in multiple steps toobtain qualified pure benzene and pure toluene and other products.In this design,in order to obtain the parameters required by the design,in order to meet the design requirements in the design process,during the design process,the materials,heat,the specific process size of the tower were calculated,and all the towerswere calculated.The load performance of the plate is calculated.After calculating the operation of various other equipment,all the parameters required in this design areobtained,including the amount of feed,the liquid flow at the top of the tower,the liquid flow at the bottom of the tower,the diameter of the tower,the height of the tower,and the distance between the plates,The actual number of plates in the rectificationsection,the number of plates in the distillation section,etc.are 109.5Kmol /h,92.682Kmol /h,16.639Kmol /h,1.6m,24.45m,0.46m,17 pieces,17 pieces,and The number of manholes is set to 7,the numerical value of the plate spacing between the manholes is 0.7m,and the numerical value of the plate spacing at the feed is 1mKeywords:low temperature hydrotreating:perforated continuous distillationtower;two benzene tower:benzene:toluene2