9 replies to this topic

[alirah]

Hi everyone,
our company has an inquiry of a filter separator. the following values are predetermined :

 

Shell ID, L, working pressure and temperature, pressure drop and micron rating.

 

we have experience on design and construction of vane and mesh pad separators. now the only problem seams to be "filter elements"

 

I have found a local company supplying these elements. but they need to know filter element dimensions (ID, OD, l).

 

I appreciate if someone can help me (or maybe suggest references) on that matter.  

[Profe]

Hi Alirah

 

For your Filter spec you need specify

Flow of liquid or gas

Inlet pressure

Temperature

Density, viscosity

Type of filter, and data for filter element

Delta pressure required

But if your filter has tecnical data sheet, maybe you get the specifications for the filter element.

 

good luck

 

Fausto

[processengbd]

To manufacture a filter separator you should have previous experience. 

 

The key parameter in filter separator design is velocity of fluid which will define your surface area of the filter that will define your shell ID and length. But i guess you are dining it other way around. Means you have shell ID & length and pressure drop. That means your client has already calculated size based on some velocity. In that case its better you ask your client for suggestion. Then you can contact filter supplier for velocity & pressure drop relationship chart or plot. Then you can size the separator accordingly.

[alirah]

Hi Alirah

 

For your Filter spec you need specify

Flow of liquid or gas

Inlet pressure

Temperature

Density, viscosity

Type of filter, and data for filter element

Delta pressure required

But if your filter has tecnical data sheet, maybe you get the specifications for the filter element.

 

good luck

 

Fausto

Fausto

I have all these information except for "Type of filter, and data for filter element". the manufacturer says that if I specify filter ID & OD, pressure drop and micron removal, they will suggest me the appropriate type. so, what should i do now?

Edited by alirah, 01 September 2014 - 09:43 PM.

[alirah]

To manufacture a filter separator you should have previous experience. 

 

The key parameter in filter separator design is velocity of fluid which will define your surface area of the filter that will define your shell ID and length. But i guess you are dining it other way around. Means you have shell ID & length and pressure drop. That means your client has already calculated size based on some velocity. In that case its better you ask your client for suggestion. Then you can contact filter supplier for velocity & pressure drop relationship chart or plot. Then you can size the separator accordingly.

Processengbd
 

I think I'm a little confused about all that matter. is there a reference for the complete design and calculation of these filters?

[chinbas]

Try GPSA you can sure find it.

[alirah]

Try GPSA you can sure find it.

I already have. chapter 7 "separation equipment" is mostly about simple wire-mesh and vane type separators. there is not much about filter separation except 2 pages of general information.

[Profe]

Hi again Alirah

I suggest that you review Chapter 18 of Perry's Chemical Engineering Handbook on: Liquid Solid Operations and Equipment, the section on "Filtration" and "The Filter media". For your help I attached the Table about the Characteristics of filter media from Perry.

 

Good luck

Fausto

Bibliography: Green, Don W.; Perry, Robert H. (2008). Perry's Chemical Engineers' Handbook (8th Edition).. McGraw-Hill. pp 18-98

Attached Files

•  Filter fabric Materials Perry.pdf   168.89KB   68 downloads

[processengbd]

 

Try GPSA you can sure find it.

I already have. chapter 7 "separation equipment" is mostly about simple wire-mesh and vane type separators. there is not much about filter separation except 2 pages of general information.

 

 

 

Have look in the following link

 

http://www.chemwork....ator sizing.pdf

 

http://www.chemwork....ator sizing.pdf

[alirah]

Fausto,

thank you so much. i'll go for it ASAP.

 

processengbd,

Yes I've seen it before. although it's only a picture form the spreadsheed and doesn't reveal the formulas behind it, but it gives a good sence of how different inputs and variables should be arranged.