7 replies to this topic

[gaurav02]

Hello,

I need help regarding this problem.

A slurry consisting of 250kg of solid is to be filtered and dried. The liquid in the slurry is an alcohol. Which type of filtration system would be the most effective one (parameters to be considered are time and area occupied)? I need to recover the alcohol too.

Currently nustche filter is being used for this process but it consumes a lot of time (4-6hrs for filtration and 8-10 hrs of drying at 373K).

 

Waiting for your suggestions

 

Gaurav

[breizh]

Hi Gaurav,

You need to give more information to support you .

What are the reasons for long cycle time on filtration , PSD product , Filter cloth resistance ? Why don't you consider more nustche  filters or nutch filter working under pressure , guessing you are working under vacuum ....Lack of information will lead probably to unsatisfactory answer. Your description of the process is weak , which technology do you use for drying ? What is the consequence if you dry at higher temperature ............

 

Just to start with.

 

Breizh

[gaurav02]

Thank you Breizh for replying

The process starts as a solid liquid chemical reaction in a slurry reactor, solid is a metal and liquid(solvent) is alcohol. The product is a solid which is then filtered in the nutsche filter.

Filtration takes time as some alcohol may be unreacted and so it is ensured that filtration takes place fully and efficiently.

Drying takes place in the filter itself. It is an agitated filter dryer. The filter is made of polypropylene and has pore size of 10 micron. Pressure of 2 bar is applied.

Their is no limit on drying temperature.

Edited by gaurav02, 18 June 2015 - 04:57 AM.

[breizh]

http://www.bhs-filtr...om/technical/#1

 

To you and others interested on this topic , go through all the literature offered in this link , this will help you and us to answer your queries .

 

Hope this helps

 

Breizh 

Edited by breizh, 19 June 2015 - 07:58 PM.

[thorium90]

Perhaps a belt press or dewatering centrifuge might be more suited for your application.

Found some brochures for you to check out.

http://www.andritz.c...se-products.htm

[gaurav02]

The solid product obtained after filtration and drying is then used in next process. The solid is a precursor which is then used for catalyst production. I am thinking of developing a semi continuous/ continuous system so that the solid is produced in higher quantity.

Currently only 2 batches of filtration of 250kg each are possible per day. 

Which continuous filtration process may be suitable in this case? Will continuous filtration be feasible? How to check feasibility?

Edited by gaurav02, 21 June 2015 - 08:36 AM.

[breizh]

gaurav2 ,

We are willing to help you but you are supplying very little information about the product , the type of industry , the objectives ( tonnage, quality , recovery of solvent ,.... ) .

Going from discontinuous to continuous process needs R&D work !

 

Why don't you stick to the existing technology , just adding more equipment or with  bigger size ?

 

My 2 cents

 

Breizh

[thorium90]

If you want a continuous process, a dewatering centrifuge could be a good option.

http://www.andritz.c...?productid=5115

http://www.alfalaval...tors/Decanters/

Perhaps you can contact a sales rep from companies like Andritz or Alfa Laval. They could provide suitable products from their catalog to serve your needs.

Some videos on how it works.