Mr. Amit

can you please send me a copy at ppatro123@yahoo.com

Thanks in adavance. ■

Mr. Amit

can you please send me a copy at ppatro123@yahoo.com

Thanks in adavance. ■

Dear Amrit

Thank you for the article on Pneumatic Conveying - it is very informative and practical solution to an otherwise difficult problem.

Best regards

Doug Phillips ■

Dear Amrit

Thank you for the article on Pneumatic Conveying - it is very informative and practical solution to an otherwise difficult problem.

Best regards

Doug Phillips ■

I wanted to thank you Amrit for sending me this interesting article about the Design Calculations for Pneumatic Conveying Systems. I am new at the Pneumatic Conveying and that is why, I have been searching for information about this topic. I found no article or book, that gave me so much practical information like this article. It is easy to understand and appropriate for doing the aproximations for a new pneumatic conveying system or to improve one.

Best Regards

David Delgado ■

I wanted to thank you Amrit for sending me this interesting article about the Design Calculations for Pneumatic Conveying Systems. I am new at the Pneumatic Conveying and that is why, I have been searching for information about this topic. I found no article or book, that gave me so much practical information like this article. It is easy to understand and appropriate for doing the aproximations for a new pneumatic conveying system or to improve one.

Best Regards

David Delgado ■

Originally Posted by Amrit Agarwal

My article "Theory and Design of Dilute Phase Pneumatic Conveying Systems" was published this month in Powder Handling and Processing magazine. This article gives an easy to use Excel-based calculation method for designing new dilute phase pneumatic conveying systems or for improving the performance of existing conveying systems.

Regards,

Amrit T. Agarwal

Consulting Engineer

Pneumatic Conveying Consulting Services

Email: polypcc@aol.com

Ph and Fax: 304 346 5125

The article "Theory and Design of Dilute Phase Pneumatic Conveying Systems" was really very useful and informative. Also request you to share knowledge about Dense phase conveying system.

Best regards,

G Das ■

Originally Posted by Amrit Agarwal

My article "Theory and Design of Dilute Phase Pneumatic Conveying Systems" was published this month in Powder Handling and Processing magazine. This article gives an easy to use Excel-based calculation method for designing new dilute phase pneumatic conveying systems or for improving the performance of existing conveying systems.

Regards,

Amrit T. Agarwal

Consulting Engineer

Pneumatic Conveying Consulting Services

Email: polypcc@aol.com

Ph and Fax: 304 346 5125

The article "Theory and Design of Dilute Phase Pneumatic Conveying Systems" was really very useful and informative. Also request you to share knowledge about Dense phase conveying system.

Best regards,

G Das ■

Dear Amrit,

Thanks for the quick response in sending your paper entitled "Theory and Design of Dilute Phase Pneumatic Conveying Systems".

After a brief review, a worthy paper and I am looking forward to working this into a usable format.

Thanks ■

Dear Amrit,

Thanks for the quick response in sending your paper entitled "Theory and Design of Dilute Phase Pneumatic Conveying Systems".

After a brief review, a worthy paper and I am looking forward to working this into a usable format.

Thanks ■

Dear Amrit

May I also request a copy of your article?

"... If you know basic Excel, you can use my calculation method publised in Powder Handling and Processing magazine in its April 2005 issue. This article gives the theory and all of the equations that are internally used in computer programs. It takes the mystery out of the computer programs. I can send a free PDF copy if you need one...."

My e-mail is helio.carvalho.1986@gmail.com

Thanks in advance

Helio Carvalho ■

Dear Amrit

May I also request a copy of your article?

"... If you know basic Excel, you can use my calculation method publised in Powder Handling and Processing magazine in its April 2005 issue. This article gives the theory and all of the equations that are internally used in computer programs. It takes the mystery out of the computer programs. I can send a free PDF copy if you need one...."

My e-mail is helio.carvalho.1986@gmail.com

Thanks in advance

Helio Carvalho ■

Dear Amrit

Thank you for the article on Pneumatic Conveying - it is very informative and practical solution to an otherwise difficult problem. If it possible, can you send me it in metric units.

Best regards

Alexander

AgroProff Ltd. ■

Dear Amrit

Thank you for the article on Pneumatic Conveying - it is very informative and practical solution to an otherwise difficult problem. If it possible, can you send me it in metric units.

Best regards

Alexander

AgroProff Ltd. ■

Dear Mr. Amrit,

Is there any difference between radius of elbows (2D-10D) in this calculation?

Can be transporting pipe not horizontal, about 30-45 deg?

Alexander

Agro Proff ■

Dear Mr. Amrit,

Is there any difference between radius of elbows (2D-10D) in this calculation?

Can be transporting pipe not horizontal, about 30-45 deg?

Alexander

Agro Proff ■

Dear Sir

i am also working in pneumatic conveying systems

If u can give me a cpy of ur artical will be great help

My email ID MANTHAN.KOTHARI@Thermaxindia.com

Regards

Manthan. ■

Dear Sir

i am also working in pneumatic conveying systems

If u can give me a cpy of ur artical will be great help

My email ID MANTHAN.KOTHARI@Thermaxindia.com

Regards

Manthan. ■

I am currently doing a project on pneumatic conveying..........your article would be of great help to me..............I would be very greatful if you could send me a copy....

Also i need to know what is the

a. saltation velocity for dilute phase ash conveying with solid loading of about 25

b. the minimum froude number for transfer witout saltation

Formula for saltation velocity?

Regards,

Rajdeep Das ■

I am currently doing a project on pneumatic conveying..........your article would be of great help to me..............I would be very greatful if you could send me a copy....

Also i need to know what is the

a. saltation velocity for dilute phase ash conveying with solid loading of about 25

b. the minimum froude number for transfer witout saltation

Formula for saltation velocity?

Regards,

Rajdeep Das ■

Mr. Agarwal,

Thank you for transmitting the article "Theory and Design of Dilute Phase Pneumatic Conveying Systems" to me. I have constructed the Excel spreadsheet and have used it to model my plant system. I has been very helpful in correlating and evaluating the conveying parameters. I did find several typo's in the original article and hope you have been able to incorporate them. It took some effort to get the units correct and eliminate my Excel circular references, but it now works well.

Jerry Fitzgerald

Mechanical Engineer, Day and Zimmermann

for Ascend Performance Materials ■

Mr. Agarwal,

Thank you for transmitting the article "Theory and Design of Dilute Phase Pneumatic Conveying Systems" to me. I have constructed the Excel spreadsheet and have used it to model my plant system. I has been very helpful in correlating and evaluating the conveying parameters. I did find several typo's in the original article and hope you have been able to incorporate them. It took some effort to get the units correct and eliminate my Excel circular references, but it now works well.

Jerry Fitzgerald

Mechanical Engineer, Day and Zimmermann

for Ascend Performance Materials ■

Dear Argawal,

I reaaly appreciate your help giving me the document for the pneumatic conveying theory and design. I am in the process of creating the spreadsheet according to the article. I needed this reference to guarante a conveying system for pellet that we are supplying.

Thank you very much ■

Dear Argawal,

I reaaly appreciate your help giving me the document for the pneumatic conveying theory and design. I am in the process of creating the spreadsheet according to the article. I needed this reference to guarante a conveying system for pellet that we are supplying.

Thank you very much ■

Dear Argawal,

Thanks for your document, this will help me very much, to understand pneumatics transport.

I will try to do the excel files to help me in the future, and i will send you to see if i'm doing right :-)

Thanks

Best Regards

Hlio Carvalho ■

Dear Argawal,

Thanks for your document, this will help me very much, to understand pneumatics transport.

I will try to do the excel files to help me in the future, and i will send you to see if i'm doing right :-)

Thanks

Best Regards

Hlio Carvalho ■

Oh drat!!

I was hoping to have posted the 500th reply ■

Oh drat!!

I was hoping to have posted the 500th reply ■

Hello all,

who was finished the excel spreadsheet? :-)

I have a problem, the Reynold's number is different in my spreadsheet ... i think the value of gas viscosity is wrong...

who can help?

thanks ■

Hello all,

who was finished the excel spreadsheet? :-)

I have a problem, the Reynold's number is different in my spreadsheet ... i think the value of gas viscosity is wrong...

who can help?

thanks ■

Dear Helioc,

Amrit mentioned in his previous posts in this thread that there are a couple of 'typos' in the paper and those have not been corrected. Try for the gas friction factor (Eq.7) following version:

http://en.wikipedia.org/wiki/Darcyf...actorformulae

equation of Swamee-Jain

Please use SI units for the Reynolds# if you use above equation. You should get much closer.

Regards,

Sven ■

Dear Helioc,

Amrit mentioned in his previous posts in this thread that there are a couple of 'typos' in the paper and those have not been corrected. Try for the gas friction factor (Eq.7) following version:

http://en.wikipedia.org/wiki/Darcyf...actorformulae

equation of Swamee-Jain

Please use SI units for the Reynolds# if you use above equation. You should get much closer.

Regards,

Sven ■

Dear Helioc,

The Reynolds number is a dimensionless figure.

Re=(D*v*gas density)/viscosity

D = pipe inner diameter in ft

v = gas velocity at outlet in ft/sec

gas density in lb/ft^3

viscosity = 0.000012365 lb/(ft.sec)

Dimensions must be in accordance.

You can use the command to show the source cells in your Excell sheet to check this formula.

Have a nice day

Teus ■

Dear Helioc,

The Reynolds number is a dimensionless figure.

Re=(D*v*gas density)/viscosity

D = pipe inner diameter in ft

v = gas velocity at outlet in ft/sec

gas density in lb/ft^3

viscosity = 0.000012365 lb/(ft.sec)

Dimensions must be in accordance.

You can use the command to show the source cells in your Excell sheet to check this formula.

Have a nice day

Teus ■

Dear Friends

We are operating two Air lift systems to lift material. One is for lifting cement for a small capacity of 15 TPH and another for lifting Raw meal for kiln feeding @ a capacity of 35 TPH.

I have attached the PDF file that shows the orientation. We have two troubles.

1. We believe power consumption is very high for both air lift. I doubt the very basic of the blower chosen for air lifting these materials. If we install blower of lesser volume and pressure the power consumption will come done. But we are unable to conclude what should be the correct volume and pressure of the Twin lobe blower.

2. We have a little positive pressure (20mmHG) in the Air lift tank. Is it normal or should that be always negative. My assumption is that, positive pressure is due to (more than desired) distance between the nozzle and the conveying pipe at the bottom (presently 90mm). The excess distance may cause lesser ventury effect in the nozzle to pipe region. Also should even bother if there is a positive in the Airlift tank?

If you could rightly tell me the exact bower volume and pressure, I would highly appreciate your feedback. Last but most important, we would be highly obliged if you give the fundamentals for choosing volume and pressure.

Thank you

Vilas

Attachments

air lift line digrm_2 (PDF)

■

Dear Friends

We are operating two Air lift systems to lift material. One is for lifting cement for a small capacity of 15 TPH and another for lifting Raw meal for kiln feeding @ a capacity of 35 TPH.

I have attached the PDF file that shows the orientation. We have two troubles.

1. We believe power consumption is very high for both air lift. I doubt the very basic of the blower chosen for air lifting these materials. If we install blower of lesser volume and pressure the power consumption will come done. But we are unable to conclude what should be the correct volume and pressure of the Twin lobe blower.

2. We have a little positive pressure (20mmHG) in the Air lift tank. Is it normal or should that be always negative. My assumption is that, positive pressure is due to (more than desired) distance between the nozzle and the conveying pipe at the bottom (presently 90mm). The excess distance may cause lesser ventury effect in the nozzle to pipe region. Also should even bother if there is a positive in the Airlift tank?

If you could rightly tell me the exact bower volume and pressure, I would highly appreciate your feedback. Last but most important, we would be highly obliged if you give the fundamentals for choosing volume and pressure.

Thank you

Vilas

Attachments

air lift line digrm_2 (PDF)

■

Dear Vilas,

I studied the pdf file and noticed the following:

The blower pressure is given at 1.5 bar.

A normal blower would deliver 0.5 to 1 bar pressure. The limiting factor is the compression temperature.

Is the stated pressure really pressure drop or absolute outlet pressure?

One blower of 1060 cfm at 1.5 bar? consumes 100 hp and the other blower consumes under the same conditions 40 hp.

The power consumption should be equal at equal performance.

Is the tank in your drawing a closed tank or an open bin?

Between the 200 mm pipe inlet and the outlet, the system can be considered and calculated as a standard pneumatic conveying system, requiring a certain airflow and pressure drop.

How the begin pressure drop is created against a given back pressure at the end of the pipeline is another issue.

The combination of a blower of 1060 cfm (# 30 m3/min = 0.5 m3/sec) and an 8” pipeline is normal for a standard pressure pneumatic conveying pipeline.

Have a nice day

Teus ■

Dear Vilas,

I studied the pdf file and noticed the following:

The blower pressure is given at 1.5 bar.

A normal blower would deliver 0.5 to 1 bar pressure. The limiting factor is the compression temperature.

Is the stated pressure really pressure drop or absolute outlet pressure?

One blower of 1060 cfm at 1.5 bar? consumes 100 hp and the other blower consumes under the same conditions 40 hp.

The power consumption should be equal at equal performance.

Is the tank in your drawing a closed tank or an open bin?

Between the 200 mm pipe inlet and the outlet, the system can be considered and calculated as a standard pneumatic conveying system, requiring a certain airflow and pressure drop.

How the begin pressure drop is created against a given back pressure at the end of the pipeline is another issue.

The combination of a blower of 1060 cfm (# 30 m3/min = 0.5 m3/sec) and an 8” pipeline is normal for a standard pressure pneumatic conveying pipeline.

Have a nice day

Teus ■