Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 8th Sem New 2181307 Design Of Air Pollution Control Equipments Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII(NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2181307 Date: 17/05/2019
Subject Name: Design of Air Pollution Control Equipments
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Enlist basic selection criteria for design of air pollution control system. 03
(b) Highlights the importance of auxiliary equipment & name atleast three. 04
(c) Enlist various types of scrubbers & briefly explain any one type with neat
sketch.
07
Q.2 (a) Explain the significance of following terms :
1. Saltation Velocity 2. Velocity Ratio 3. Cut size diameter
03
(b) Enlist & explain factors affecting performance of cyclone separator efficiency. 04
(c) A high efficiency cyclone with dia. of 1000 mm handles 2 m
3
/s of standard air
carrying particles with density of 1600 kg/m
3
. Determine cut size dia. with gas
density of 1.185 kg/m
3
. ( Assume ?g = 1.84 x 10
-5
kg/m.s )
07
OR
(c) Design a high efficiency cyclone of maximum particle collection efficiency for
45,000 m
3
/ hr of air stream at 150 ? C, considered to be flue gas releasing 650
g/s of dust. The dust mean dia. is 10?m & density of particle 1600 kg/m
3
.
(Assume ?g @ 100 ? C = 2.1 x 10
-5
kg/m.s& assume suitable data)
07
Q.3 (a) Define the following terms;
1. Capture Velocity 2. Minimum transport velocity3. Coefficient of
Entry
03
(b) Write down the design procedure for determination of bag filter hopper bottom. 04
(c) A bag house having 10 compartments, 260 bags per compartment and each bag
having a diameter of 200 mm & length is 5 m with a gas flow rate is 1,20,000
m
3
/ min. Calculate air ? to ? cloth ratio. Assume that 2 compartment is out of
service then determine percent change in A/C ratio.
07
OR
Q.3 (a) Define the following terms:
1. Air ? to ? cloth ratio 2. Can Velocity 3. Filter drag
03
(b) Enlist various operational & design parameters for design of bag filter. 04
(c) During a test on clean bag filter the filter drag due to dust at the end of the test
period is 1000 N-min/m
3
and the resistance Rp of the dust built up on the cloth
was found to be 30000 sec
-1
. The dust loading in the dirty air stream is 5g/m
3
. If
the pressure drop increases by 10 mbar during the test, estimate the time of test
period in hour.
07
Q.4 (a) Explain the significant particulate matter removal mechanisms of venturi
scrubber.
03
(b) An electrostatic precipitator with a specific collection area of 0.984 m
2
/ m
3
/
min is found to have an actual overall collection efficiency of 97 %, if the
specific collection area is increased to 1.312 m
2
/ m
3
/ min. Estimate the
anticipated collection efficiency on the basis of (1) Deutsch equation (2) Hazen
type equation with the value of n is equal to 4.
04
(c) A venturi scrubber is to be designed to collect particulate matter from an
industrial operation. The liquid flow rate to the scrubber is 1.35 L/ m
3
of air and
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII(NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2181307 Date: 17/05/2019
Subject Name: Design of Air Pollution Control Equipments
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Enlist basic selection criteria for design of air pollution control system. 03
(b) Highlights the importance of auxiliary equipment & name atleast three. 04
(c) Enlist various types of scrubbers & briefly explain any one type with neat
sketch.
07
Q.2 (a) Explain the significance of following terms :
1. Saltation Velocity 2. Velocity Ratio 3. Cut size diameter
03
(b) Enlist & explain factors affecting performance of cyclone separator efficiency. 04
(c) A high efficiency cyclone with dia. of 1000 mm handles 2 m
3
/s of standard air
carrying particles with density of 1600 kg/m
3
. Determine cut size dia. with gas
density of 1.185 kg/m
3
. ( Assume ?g = 1.84 x 10
-5
kg/m.s )
07
OR
(c) Design a high efficiency cyclone of maximum particle collection efficiency for
45,000 m
3
/ hr of air stream at 150 ? C, considered to be flue gas releasing 650
g/s of dust. The dust mean dia. is 10?m & density of particle 1600 kg/m
3
.
(Assume ?g @ 100 ? C = 2.1 x 10
-5
kg/m.s& assume suitable data)
07
Q.3 (a) Define the following terms;
1. Capture Velocity 2. Minimum transport velocity3. Coefficient of
Entry
03
(b) Write down the design procedure for determination of bag filter hopper bottom. 04
(c) A bag house having 10 compartments, 260 bags per compartment and each bag
having a diameter of 200 mm & length is 5 m with a gas flow rate is 1,20,000
m
3
/ min. Calculate air ? to ? cloth ratio. Assume that 2 compartment is out of
service then determine percent change in A/C ratio.
07
OR
Q.3 (a) Define the following terms:
1. Air ? to ? cloth ratio 2. Can Velocity 3. Filter drag
03
(b) Enlist various operational & design parameters for design of bag filter. 04
(c) During a test on clean bag filter the filter drag due to dust at the end of the test
period is 1000 N-min/m
3
and the resistance Rp of the dust built up on the cloth
was found to be 30000 sec
-1
. The dust loading in the dirty air stream is 5g/m
3
. If
the pressure drop increases by 10 mbar during the test, estimate the time of test
period in hour.
07
Q.4 (a) Explain the significant particulate matter removal mechanisms of venturi
scrubber.
03
(b) An electrostatic precipitator with a specific collection area of 0.984 m
2
/ m
3
/
min is found to have an actual overall collection efficiency of 97 %, if the
specific collection area is increased to 1.312 m
2
/ m
3
/ min. Estimate the
anticipated collection efficiency on the basis of (1) Deutsch equation (2) Hazen
type equation with the value of n is equal to 4.
04
(c) A venturi scrubber is to be designed to collect particulate matter from an
industrial operation. The liquid flow rate to the scrubber is 1.35 L/ m
3
of air and
07
relative velocity of gas to the liquid is 91.5 m/s. The flue gas temperature is 298
K & pressure 1 atmosphere carrying particle density 1500 kg / m
3
. Determine
the efficiency of venturi scrubber for particle size of 10 ?m. (? g = 1.84 x 10
-5
kg/m.s)
OR
Q.4 (a) Write down the equation for determination of convergent & divergent section
length of venturi scrubber.
03
(b) For an Electrostatic precipitator of given geometry & operating conditions it is
found that collection efficiency of 10 ?m size particle is 99.8 % , on the basis of
Dutch type equation , estimate collection efficiency for (1) 5 ?m & (2) 0.2 ?m
particles.
04
(c) Write a short note on adsorption as a gaseous control equipment. 07
Q.5 (a) Name various adsorbent for control of gaseous pollutants. 03
(b) Define adsorption & differentiate between physical & chemical adsorption. 04
(c) Enlist various types of hood along with its specific application & draw any one
type of hood.
07
OR
Q.5 (a) Name points to be considered while design of Duct system. 03
(b) Name various reactive & nonreactive absorbent used for control of gaseous
pollutants.
04
(c) Write a short note on absorption as a gaseous control equipment. 07
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This post was last modified on 20 February 2020