awais separator.pptx

8/11/2019 awais separator.pptx

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Rep


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We can select separator on the basis of following factors

L/D ratio

Gas liquid ratio

Vessel volume


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Feed=F=41030.52 kg/hr

Vapor-LiquidSeparator

T=433 KP=16 bar

Fv = 22728.3kg/hvapor

FL= 18302.2 kg/

Liquid


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For gas phase:

mass flow rate= Fv = 6.3 kg/s

Gas stream density: v= 10.2 kg/m3

volumetric flow rate = Qv =Fv/ v

=0.61 m3/s

For liquid phase:

mass flow rate= FL = 5.1 kg/sLiquid stream density = L= 800 kg/m

3

volumetric flow rate=QL= FL/ L

=0.006 m3/s


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Maximum Velocity can be calculated as

= 0.15 m/sec

(Chemical process engineering design and economics by Ha

2

1

0107.0

V

VL

GV


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VESSEL AREA FOR GAS = Gas volumetric flow rate/ Gas velocity

= 4.12 m2


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= 2.29 m

(Chemical process engineering design and economics by Harry Silla)

21

4

AD


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VOLUME FOR THE LIQUID

Volume for the liquid = Liquid volumetric flow rate * Residence time

= 0.0063 m3/s * 180 s

= 1.14 m3

LIQUID HEIGHT

Liquid height = (Liquid volumetric flow rate * Residence time)/ (vessel

Area for gas)

LL = 0.27 m

TOTAL HEIGHT

Total height = LL + 1.5 D + 0.457 m

= 4.162 m

(Chemical process engineering design and economics by Harry Silla


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lengt

diameter =

= 1.8

Since our L/D ratio lies in the range of 1.7 to 3.6 so we

select vertical vapor liquid separator


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From (Chemical process engineering design and economics bHarry Silla)

If pressure is greater than 10.3 bar then use ellipsoidal

head

If pressure is less than 10.3 bar then use tori spherical hea

So we are using ellipsoidal head

tH= PD/(2HS 0.2P) + tc

Where


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As a rule of thumb

H/D = 6.3 10-3m

H = 0.014 m


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As a rule of thumb

The thickness of mist eliminator is usually 0.0154 m

(Chemical process engineering design and economics by Harry Silla)


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Vessel area 4.12 m2

Vessel diameter 2.29 m

Liquid height 0.27 m

Total height 4.162 m

L/D ratio 1.8

Wall thickness 0.022 m

Head thickness 0.019 m

head 0.014 m


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awais separator.pptx

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