2. Sample Problem in Flow sheet Drawing
Catalytic reforming is a key process in the production of gasoline components and aromatics for chemical industry. One type of reforming process is semi regenerative reforming (SRR). SRR units consists of several (3 or 4) adiabatic fixed-bed reactors in series with intermediate heating.
The Naptha feed is preheated at 770K and sent to the first reactor. In this reactor, the kinetically fastest reactions occur at 720K. These are the dehydrogenation reaction of napthenes to aromatics. To maintain high reaction rates, the product gases are reheated in a furnace at 780K before being sent to a second reactor at 760K. Then again, reheated to 790K and fed to a third reactor at 780K.
The effluent from the last reactor is cooled by heat exchange with the feed. Then hydrogen is separated from the liquid product and partly recycle to the process. The net hydrogen production is used in other parts of the refinery. The liquid product is fed to stabilizer in which the light hydrocarbons are separated from high-octane reformate

3. For the given process description
Draw a PFD
Name all the existing equipment for Unit 100
Number all stream lines