Dear Mr.Armit,

Thanks for your information on Theory books also.

As suggested I will try to get the book by Stoess on the subject.

K.Ranadheer

Asian Paints Ltd.,

Chennai, India. ■

Dear Mr. Agarwal:

I've been studying your article, and I've a few questions for you if you don't mind...

First of all I'd like to remind you I'm working with malt barley powder, in a vacuum conveying system.. now here are a few questions:

- Currently there's no record in plant of how much is the solids mass flow rate, how would you recomend to estimate this amount? The system configuration it's a lot more complicated than the one that was as an example on the article, the configuration installed here has many diameter variations during its route.

- Also this is a new study about this system so I'm also needing information regarding the gas velocity at the inlet of the system, so any articles or information about that would be great too.

- The system has many atmospheric air intakes during its route to help the vacuum system, how should those intakes be considered like? Should all of them be cosidered as one? I'm a little confused with that subject.

- And finally, there're also many other accesories in the system that are not figured on the article you sent, as Y's, caissons(atm. air intakes), Tees, etc. Any chance of you having any info on equivalent lenght of those? Or is it any other way this accesories should be treated like?

I know this a lot, but any help I can get on these matters will be very much apreciatted, if u rather send the info or any documents or articles to my mail it'd be also great.

Many many Thanks,

Jose Quiroz

josenestor7@gmail.com ■

Dear Mr. Agarwal:

I sent you an email with my request a couple of days ago so, I'll be checking my mail every once in a while..

Thanks again...

Jose Quiroz

josenestor7@gmail.com ■

Reply -calculation sheet

Thank you very much for your prompt replies.

Kindly go thro the attached calculation sheets & post your valuable comments.We are in position to suggest 0.75kw motor capacity.

Thanks

With Regards,

Vidyaprakash

Attachments

blowroom-conveyerforum2 (ZIP)

■

I am planning to have a pneumatic conveying system. For that i am interested to have details of basic calculations i.e. with my required capacities and distance what will be the air requirement and power requirements etc. so that i can have cost benifit analysis and go further in detailed designing of the system.

Can I have such initial calculation sheet. May be mailed at

jigarrshahin@gmail.com ■

Could you send the calculation excel to me ?? cihaddemirel@hotmail.com



Regards

Cihad Demirel

Mechanical Engineer

stanbul / Turkey ■

Dear Amrit

may I have a pdf copy of your article

" Theory and Design of Pneumatic Conveying Systems" as published in the April 2005 issue of Powder Handling Magazine.?

and could you kindly forward your excel files to my e-mail

[email]poenono@hotmail.com

thank you very much!

Best regards ■

Dear Amrit

Can you send me a pdf copy of your article " Theory and Design of Pneumatic Conveying Systems" as published in the April 2005 issue of Powder Handling Magazine.?

and could you kindly forward your excel files to my e-mail

cihaddemirel@hotmail.com

thank you very much!

Best regards

Cihad Demirel ■

has anyone heard of Mr Agarwal again? I've been waiting for an email response for almost 3 weeks now... does anyone know if he's on vacations or anything like that? any chances of coming back soon? ■

i'm waiting too i think we cant take this articles ... ■

Dear Amrit,

Many thanks for the article which has proved most interesting and helpful. ■

Dear Mr. Agarwal:

I wanted to know if you got my email about the questions posted above a couple of weeks ago, if you could help me with those I'd really thank you.

If you didn't get the email, I'd like to know so I could sent it again. Anyway I hope I'm not being too much trouble, I just wanted to be clear with everything so I can start my calculations.

Thanks again.

Jose Quiroz

josenestor7@gmail.com ■

Dear Mr. Agarwal and other users of the forum,

After reading Mr. Agarwal's article,"Theory and design of dilute phase pneumatic conveying systems", it really helped me understand quite a lot. I even tried out to generate the excel sheet for better understanding. However, i encountered a problem and i cannot solve it.

The calculation of the solids acceleration for section no. 2 and after, for my case are still very large.

I understand that section 2 onwards, acceleration is not a big issue, thus, p.drop value becomes lower,

But how do i get the trend similar to the appendix 3 of the article? which has high pressure drop due to solids acceleration in the 1st section and low values thereafter?

As the formula is (W.Vp)/g, the only changing parameter is Vp right? In this case, does Vp change so much such that to cause the distinct difference in p.drop?

For section no. 2, do we enter the same formula as in section no.1? If yes, we'll get approximately the same p.drop values right?

Regards and thanks in advance

Matthew ■

Dear Mr. Amrit Agarwal,

would you please send me your related article which are useful for designing bagfilter and rotary airlock.

Best Regards

Masoomeh Amin

amin@momtazan.com ■

I am working on pulverized coal conveying design, and I want to calculate the consumption of conveying gas (Nitrogen).

Could anyone please send me the articles "Design of dilute phaase pneumatic conveying lines" and "Theory and Design of Dilute Phase Pneumatic Conveying Systems" and

calculations(excel sheet)

My Email joe927@hotmail.com

Thanks a lot! ■

excuse me mr. agarwal, have you read the mail i sent you about a moth ago or so about my doubts? any chance you could answer it? ill resend the email if necessary... ■

Attention: Mr. Amrit Agarwal / Consulting Engineer / Pneumatic Conveying Consulting

Dear Amrit

Regarding your article about pneumatic conveying, published in Powder Handling and Processing magazine in April 2005 issue, Could you send me a copy by e-mail?

Thats information will help me to review our rewinder paper trim handling conveying fan system. Do you have some recommendations to be use in paper trim conveying design?

Thank you for your answers

Best regards ■

Dear Amrit,

May I have a copy of the article "" Theory and Design of Pneumatic Conveying Systems" published in the April 2005 issue of Powder Handling Magazine.?

Could you also send the Excel file to my below mentioned Email address ?

Regards,

Mohanvishnu ■

I'd like to thank mr. agarwal for dedicating his time to respond to my questions. His answers were very useful to take the necesary considerations. ■

Hi all,

thanks foremost to Amrit Agarwal for sending me the fine article
.

I got down to programming my EXCEL to run the spreadsheet as explains in his article, but i can't seem to replicate the results. =(

For example, it is written that to calculate Solids acceleration, to use the formula,

Solids acc = [[W.Vp]/4640], whereby W is Solid line loading and Vp is velocity of solids.

At the beginning of the transfer, i am able to see/understand the higher value due to acceleration of solids from zero to 80% gas velocity, but how about after that, Solids acc will contine to increase due to increase in velocity.

But in the spreadsheet in the article, cell C2 results of 0.372 reduces to 0.006. how so if Solids acc = [[W.Vp]/4640], and Vp is increasing? Am i missing out something?

My question is how does the spreadsheet take into account the beginning of the transfer whereby the pressure drop is high due to acceleration of particles, and lower when travelling along a horizontal pipe. Also how the formula takes into account entering and exiting a bend. Since outlet gas velocity is ever-increasing in the spreadsheet. [I assume, solid velocity is 80% of gas velocity].

I would like to attached my spreadsheet that is modelling after the article, but am wondering if it is okay with Amrit Agarwal.

Has anyone done a calculation using the same spreadsheet, and wouldn't mind sharing it with me? you can email me the spreadsheet to

thank you......@yahoo.com>■

ABS , 8000kg/h, dilute phase

injector->4"X5m(H)->10D(H)->12m(H)->10D(H)->20m(H)->10D(HV)->6m(V)->10D(VH)->10m(H)->10D(HV)->10m(V)->10D(VH)->5"20m(H)->10D(HV)->10m(V)->40m(H)

pick up velocity 19m/s

My calculation is 70KPa.

matches your calculation? ■

Dear Dr. Amrit Agarwal,

I am interested to have copies of your valued articles, "Product quality in pneumatic conveying", "Design Guide for Dust Collectors" and "Improving Rotary Valve Performance" . I am sure these articles would to be very very useful for all of us working in the relevant field. Expecting these copies at my email, "starselvan@yahoo.com".

Regards,

S.T.Selvam

India. ■

Dear Mr. Agarwal:

Thank you very much for your article. It is very comprehensive and will be of great help to me.

Steven Quon ■

Dear Mr. Agarwal:

I would like to thank you a lot for your copy of the "Theory and Design of Dilute Phase Pneumatic Conveying Systems". It will help me a lot in the current project we are developing.

So now I will be able to check and confirm the different conveying system we have.

Best regards,

JAHH ■

Thanks Mr. Amrit your article is very useful. This article, makes us understand the Fundamental concepts, definitions, and equations used in the pneumatic systems

Best regards ■

I found the article written by Amrit T. Agarwal very useful and I really don't know how to thank ■

I just got the article " Theory and design of dilute phase pneumatic conveying systems" from Mr. A.T. Agarwal. It is a very useful for pneumatic convery system design.

Thank you! A.T. Agarwal

Mark ■

Mr. Agarwal,

Thank you for your article "Theory and Design of Dilute Phase Pneumatic Conveying Systems". The procedure described in the article allowed me to model and better understand our pneumatic transfer system. It has identified some opportunities to reduce product breakage and energy consumption.

Kurt Dyck ■

Amrit Agarwal sir,

Thanks for the article you sent me on "Dilute phas pneumatic conveying calculations". The article gives very elaborate explanation about basic factors influencing penumatic conveying calculations and there inter relation ship. Spread sheet calculations clarifies it further.

Once again thanks for your help. Sir, can you also sent me other three articles written by you?

Regards,

Murugan Elumalai ■

Dear Amrit,

Thankyou for sending me your article on lean phase conveying, this helped me to understand the fundamentals and will assist me with the design of powder handling system. No doubt that I will be refering to it regularly in the future. Thankyou once again! ■

Dear Armit,

Many thanks to you for your professional paper.

I think it would really help everyone who want a total solution for pneumatic calculation!

Thank you again!

Zhifeng Guo ■

Dear Mr. Agarwal,

I have just received your copy of article regarding "Theory and Design of Dilute Phase Pneumatic Conveying Systems". It is absolutely helpful for the people who interest to learn and to upgrade their know-how in pneumatic conveying (dilute phase system).

Many thanks and waiting for your next article.

Best regards,

Leo ■