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Solid Product Pneumatic Transfer

12/02/2008 1:03 AM

Hello Friends,

Please help me out with formulas for selecting & engineering Pneumatic Solid Product transfer application of :

a . Screw Conveyors

b . Rotary Blowers

c . Pipe lines

for Solids : Flour (bulk density 42 lb/ft3 ) & Sugar.

This is for a Biscuit Factory Dough Mixing Section where the requirement is:

Branch Feed line:

Mixing Lines Nos 1 thru 5 : 200-300 Flour kg/Batch & Sugar 60-105 Kg/batch.

Mixing line No:6 450-650 Flour kg/batch & Sugar 70-160 kg/batch

Total : Flour 2200-2500 Kg & Sugar 650-725 kg

It is intended to collect separately the Flour & Sugar into a hopper with screw conveyor and transfer to Mixing Section with Rotary Blower via a Main line , teeing off at each Mixing Line's individual hopper.

How do I size the Screw Conveyors & Blower for Flour (2500 kg) & separately for Sugar (725 kg)?

How do I engineer & size the Main line as well as branch lines for both these solid products?

Engineering sites for calculations will highly be appreciated.

Best Regards,

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#1

Re: Solid Product Pneumatic Transfer

12/03/2008 5:00 AM

Hi, ducon!

Not my area of expertise, I'm sorry to say; but I have spent some time in mills as an observer.

One of the chief things that comes to mind when reading your question is that in the mills where I observed, the ingredients were normally lifted to a series of top floors throughout the mills; in some cases just a tower the ingredients passed through after being loaded into lifts on a lower floor, and gravity was employed to assist the feed through the various processes down to the baking floor after which packing and shipping took over.

Mark

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#8
In reply to #1

Re: Solid Product Pneumatic Transfer

12/03/2008 2:27 PM

Thanks Mark. I appreciate.

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#2

Re: Solid Product Pneumatic Transfer

12/03/2008 6:05 AM

www.hapman.com/food

Also do a search under Food Bulk Handling many resources available there.

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#6
In reply to #2

Re: Solid Product Pneumatic Transfer

12/03/2008 2:21 PM

Thanks for the site address. Please try and get me a site that details methods/graphs for pipe sizing solids like flour & sugar. Thanks.

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#10
In reply to #6

Re: Solid Product Pneumatic Transfer

12/04/2008 10:17 AM

Just curious about the picture on your site is that a steam to hotwater converter? It also, looks like

a steam driven pump to get condensate back, hard to tell on postage size picture, again just curious

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#11
In reply to #10

Re: Solid Product Pneumatic Transfer

12/04/2008 2:34 PM

Thats a Ducon Condensate Power Pump. Look up my website:www.duconems.com for details. Also go to Youtube and search with condensate power pump/ducon/ducon condensate power pump and watch the video on the pump operation both with steam/compressed air.

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#12
In reply to #11

Re: Solid Product Pneumatic Transfer

12/04/2008 2:49 PM

OK my observations are confirmed those are slick units Thanks for the reply.

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Anonymous Poster
#3

Re: Solid Product Pneumatic Transfer

12/03/2008 11:11 AM

Martin drives book has has info for calcuating all aspects , you'll like it.Have fun. P.S. US bearings and drives can get you one.

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#7
In reply to #3

Re: Solid Product Pneumatic Transfer

12/03/2008 2:22 PM

Martin drives book has has info for calcuating all aspects. Thanks but how do I get it? Any website address.

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#4

Re: Solid Product Pneumatic Transfer

12/03/2008 12:49 PM

Need more information. This can be a complex question.

Pneumatic conveying can be lite phase or dense phase depending on distance, rate, method of measuring (loss in weight feeders or weigh tank out or weigh tank in). It can be pulled by vacuum or pushed by air pressure.

All will need dust collectors that presumabally recover the product.

Most importantly DON'T OVERLOOK THE EXPLOSIVE NATURE OF THE DUSTS. Explosion supression systems in conveying lines, baghouses and tanks can be tricky and require a specialist.

Paddler

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#5
In reply to #4

Re: Solid Product Pneumatic Transfer

12/03/2008 2:18 PM

Yes I know the complexity of my question.

It can be pulled by vacuum or pushed by air pressure - By air pressure you mean both compressed air/ Rotary Blowers.

Presently i am interested in a site that gives solid pipeline sizing. The Engineering Tool Box did help for it does have some information on Solids but no pipesizing for Flor & Sugar.

Thanks for your input.

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#9
In reply to #5

Re: Solid Product Pneumatic Transfer

12/03/2008 2:43 PM

Have you happened across the CheResources page yet?

http://www.cheresources.com/pnuconvey.shtml

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Guru

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#13
In reply to #9

Re: Solid Product Pneumatic Transfer

12/04/2008 2:57 PM

Guest - You are a "know-it-all-guy". Thanks. Thats something I am looking around for. Formulas & formulas + Flow charts/drawings. Tough it will take me a week to work on them but they really will contribute a lot to my personal knowledge and help me in engineering my project. Umpteen thanks.

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Anonymous Poster (2); ducon (6); MarkTheHandyman (1); Paddler (1); pipeit (3)

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