Difference between revisions of "Cyclone"

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== basic calculation cyclone ==
 
== basic calculation cyclone ==
  
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The nomographs by Zanker can be used to make a preliminary estimate of the size of cyclone needed. The specialist manufacturers of hydrocyclone equipment should be consulted to determine the best arrangements and design for a particular application. Zanker’s method is outlined below and illustrated in the Example below and based on an empirical equation by Bradley (1960):
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'''The nomographs by Zanker''' can be used to make a preliminary estimate of the size of cyclone needed. The specialist manufacturers of hydrocyclone equipment should be consulted to determine the best arrangements and design for a particular application. Zanker’s method is outlined below and illustrated in the Example below and based on an empirical equation by Bradley (1960):
  
 
[[File:rumusA.jpg|600px|thumb|centre|alt text]]
 
[[File:rumusA.jpg|600px|thumb|centre|alt text]]
  
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Where:
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Where '''d50''' = the particle diameter for which the cyclone is 50 per cent efficient, '''Micron'''. '''Dc'''  = diameter of the cyclone chamber, '''cm,'''. ''u''    = liquid viscosity, centipoise (mN s/m2). '''L'''  = feed flow rate, l/min, ''p''l    = density of the liquid, g/cm3. ''p''s    = density of the solid, g/cm3.
  
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'''d50''' = the particle diameter for which the cyclone is 50 per cent efficient, '''Micron'''
 
  
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'''Dc'''  = diameter of the cyclone chamber, '''cm,'''
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for calculating efficiency cyclone, we can find by below equation.
  
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''u''    = liquid viscosity, centipoise (mN s/m2),
 
  
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'''L'''  = feed flow rate, l/min,
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[[File:rumusF.jpg|5000px|thumb|centre|alt text]]
  
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''p''l    = density of the liquid, g/cm3,
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== calculation Cyclone ==
  
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''p''s    = density of the solid, g/cm3.
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Estimate the size of hydrocyclone needed to separate 90 percent of particles with a diameter greater than 20-micron m, from 10 m3/h of a dilute slurry.
  
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'''Physical properties:''' solid density 2000 kg/m3, liquid density 1000 kg/m3, viscosity 1 mN s/m
  
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So we can find:
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[[File:rumusG.jpg|5000px|thumb|centre|alt text]]
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from the below graph, we can find d50 is 14 Micron Meter
  
 
[[File:rumusB.jpg|5000px|thumb|centre|alt text]]
 
[[File:rumusB.jpg|5000px|thumb|centre|alt text]]
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                                             Determination of d50 from the desired particle separation
 
                                             Determination of d50 from the desired particle separation
  
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furthermore, we can see the different variable that determines cyclone such as viscosity, density, flow rate, diameter inside the cyclone.
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for
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[[File:rumusH.jpg|5000px|thumb|centre|alt text]]
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we can find '''D'''c using below graph, and '''D'''c is '''16 cm'''
  
 
[[File:rumusC.jpg|5000px|thumb|centre|alt text]]
 
[[File:rumusC.jpg|5000px|thumb|centre|alt text]]
  
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after that, for looking at another dimension base on the below figure:
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[[File:rumusD.jpg|5000px|thumb|centre|alt text]]
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the dimension of the cyclone are:
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'''Thickness plate 2 mm'''
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'''DC   160 mm'''
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'''DC/5   32 mm'''
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'''DC/3   53.33 mm'''
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'''DC/2   80 mm'''
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'''DC/7   22.86 mm'''
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'''DC/10  16 mm'''
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== CFD ==
  
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after define '''D'''c, we can find another dimension base on the below picture.
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    '''Step 1:''' generating geometry base on calculation.
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[[File:swcylone.jpg|5000px|thumb|centre|alt text]]
  
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[[File:rumusD.jpg|5000px|thumb|centre|alt text]]
 
  
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== calculation Cyclone ==
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    '''Step 2:''' generating mesh

Latest revision as of 16:19, 30 November 2020

basic calculation cyclone

The nomographs by Zanker can be used to make a preliminary estimate of the size of cyclone needed. The specialist manufacturers of hydrocyclone equipment should be consulted to determine the best arrangements and design for a particular application. Zanker’s method is outlined below and illustrated in the Example below and based on an empirical equation by Bradley (1960):

alt text

Where d50 = the particle diameter for which the cyclone is 50 per cent efficient, Micron. Dc = diameter of the cyclone chamber, cm,. u = liquid viscosity, centipoise (mN s/m2). L = feed flow rate, l/min, pl = density of the liquid, g/cm3. ps = density of the solid, g/cm3.


for calculating efficiency cyclone, we can find by below equation.


alt text

calculation Cyclone

Estimate the size of hydrocyclone needed to separate 90 percent of particles with a diameter greater than 20-micron m, from 10 m3/h of a dilute slurry.

Physical properties: solid density 2000 kg/m3, liquid density 1000 kg/m3, viscosity 1 mN s/m

So we can find:

alt text

from the below graph, we can find d50 is 14 Micron Meter

alt text
                                           Determination of d50 from the desired particle separation

for

alt text


we can find Dc using below graph, and Dc is 16 cm

alt text

after that, for looking at another dimension base on the below figure:

alt text

the dimension of the cyclone are:

Thickness plate 2 mm

DC 160 mm

DC/5 32 mm

DC/3 53.33 mm

DC/2 80 mm

DC/7 22.86 mm

DC/10 16 mm

CFD

    Step 1: generating geometry base on calculation.


alt text


    Step 2: generating mesh
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