7/26/2019 204942 42151 b5105 Advanced Chemical Engineering Plant
Design
1/2
Code No: B5105
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
M. Tech II Semester Supplementary Examinations March/April
2010
ADVANCED CHEMICAL ENGINEERING PLANT DESIGN
(CHEMICAL ENGINEERING)
Time: 3hours Max.Marks:60
Answer any five questions
All questions carry equal marks
- - -Note: Steam tables, Heat transfer and other chemical
Engineering data books are to be
provided
1. 20,000 Kg/hr of a 420 API kerosene leaves the bottom of a
distilling column at
2000c and will be cooled to 100
0C by 68,000 kg/hr of 34
0API mid-continent crude
coming from storage at 380c and heated to 80
0c. A 7.0 x 10
4Pa pressure drop is
permissible on both streams, and a combined dirt factor of 0.003
should be
provided.
Available for this service is a 53.98cm in ID; exchanger having
158 tubes 2.54cmOD, 13 BWG tubes 488 cm long and laid out on 3.175
cm square pitch. The bundle
is arranged for four passes, and baffles are spaced 13 cm.
apart.Will the exchanger be suitable? What is the dirt factor?
2. Discuss the evaporator process in caustic soda concentration
with forced circulation
evaporators?
3.a) Discuss about vaporizer or pump-through reboiler with
isothermal boiling.b) A vaporizer is to generate 4,500 kg/hr of 15
psig steam by removing heat from a
bottom product. The bottom product is 68,000 Kg/hr of
approximately 420 API
kerosene leaving a column at 2050c. The design co-efficient in
the vaporizer will be
about 100. Compare the true average specific volume with that
obtained by the
approximate method ts= 1210
c 2200 /s KJ Kg = .
4. Write the following with reference to the design of a
columna) Write about the types of packings in a column.
b) Write about the choice of plate types?
5.a) Write about the operating characteristics of
sieve-Tray.
b) Write about the following factors in the design of
Sieve-Tray.
i) Tower diameterii) Plate spacing
iii) Entrainment
iv) Weepage.
6.a) Discuss about the mechanical design of columns. Write about
the vessel design.
b) Explain with a neat diagram the vessel supports and vessel
foundations.
NR
