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Calc

The document describes the design of a pulse jet bag filter system. It lists the key parameters considered in the design such as gas flow rate, temperature, dust concentration and particle size. It then outlines the steps to calculate the required filtering area, volume occupied by the filter, compressed air consumption and surface area occupied by the filter using common formulas. An example calculation is provided. Distribution of the bags across rows and columns in the bag house is also discussed.

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406 views2 pages

Calc

The document describes the design of a pulse jet bag filter system. It lists the key parameters considered in the design such as gas flow rate, temperature, dust concentration and particle size. It then outlines the steps to calculate the required filtering area, volume occupied by the filter, compressed air consumption and surface area occupied by the filter using common formulas. An example calculation is provided. Distribution of the bags across rows and columns in the bag house is also discussed.

Uploaded by

basavaraju535
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as XLS, PDF, TXT or read online on Scribd
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PULSE JET BAG FILTER DESIG

Flow gas rate
Temperture
Concentration of the dust in gases
Average diameter of the particle in dust
Tye of dust to be handled

Calculation of filtering area
Total filtering area required as per Calculation
Volume occupied by filter
Consumption of Compressure Air
Surface occupied by the filter

Assumptions of bag size
Diameter of the bags to be fixed
Length of the bags

No of bags required 

DISTRIBUTION
Number of Rows in the Bag house
Number of Columns in the Bag house

Formulas used in designing
The filtering surface (SF) given in m2 is estimated using the following expression:
SF [ m 2 ]= 0 . 26⋅F⋅c 0 .18 +350⋅φ−0 .5
Where:
F = gas flow at 25 °C given in m3/min
c = concentration of dust given in g/m3
φ = average diameter of the particle, in μm
For example, con F=700 m3/min , c = 40 g/m3, φ = 50 μm :
SF [ m 2 ] =[ 0 . 26⋅7 00⋅( 40)0 . 18 ]+ [ 350⋅( 50 )−0. 5 ]=403 m 2
Volume occupied by the filter (m3) = 0.33 · SF; 133 m3 for the examp
Consumption of compressed air (Nm3/h) = 0.215 · SF; 87 Nm3/h for the exa
Surface occupied by the filter (m2) = 0.047 · SF; 19 m2 for the example
In case the values of “c” and “φ” are unkown, an appropriate expression is:
SF [ m2 ]≈0 . 014⋅Q , Q must be given in Nm3 /h
ULSE JET BAG FILTER DESIGN

110000 m3/hr
120 degree C
the dust in gases 50 gm/m3
r of the particle in dust 100 µm
Cement

iltering area
ea required as per Calculation 842.5 m2
278.0 m3
Compressure Air 181.1 Nm3/hr
 by the filter 39.6 m2

bags to be fixed 0.15 m
3.5 m

505 nos

in the Bag house 10 nos
mns in the Bag house 51 nos

owing expression:

= 0.33 · SF; 133 m3 for the example


= 0.215 · SF; 87 Nm3/h for the example
· SF; 19 m2 for the example
xpression is:

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