Arun,

My article "Theory and Design of Pneumatic Conveying Systems" gives the Excel-based calculation method for designing dilute phase pneumatic conveying systems. If you know basic Excel, this method is simple to use. You can use it to design your fly ash pneumatic conveying system. Send me an email if you want a copy of this article.

Regards,

Amrit T. Agarwal

Consulting Engineer

Pneumatic Conveying Consulting

Email: polypcc@aol.com

Ph and Fax: 304 346 5125 ■

Dear Arun,

Firstly, you can browse through the pneumatic conveying section of this forum.

That will already give you an idea of the related topics of the pneumatic conveying technology.

To advise you more specifically on your case, it is necessary to know more data, s.a. product, particle size distribution, moisture content, temperature, angle of repose(settled or fluidized), material density, bulk density, pipe routing, bends and capacity.

Also the way of feeding the material into the airflow and the destination of the material (silo, loading station, etc.) will influence the design.

Success ■

Dear Arun,

A pneumatic conveying installation consists of:

1- a feeding station ( rotary lock, screw feeder, blow tank system, compressor and control system).

2- a conveying pipe

3- a receiving station with filter, for separating the material from the conveying air.

A belt conveyor consists of :

1- a loading station with filter and flow control.

2- a rigid support structure with rollers and idlers and the belt with driven and tensioning device.

3- a receiving station with filter and scraper.

The main difference is 2- : the routing.

A pneumatic conveying pipe can be routed easily around objects, upwards and downwards.

Filling a high silo only requires a vertical pipe.

A conveyor belt requires a straight route.

The supports must be rigid, to maintain alignment.

Sharp corners require transfer points to another belt conveyor.

High elevation differences require large slopes (with big support structures) or a bucket elevator.

Depending on the product an enclosure is also needed.

The belt conveyor requires more maintenance than a pneumatic conveying system.

Fluidisable products are difficult to transport by a belt conveyor du to the sometimes erratic flow behavior ( a pipe belt performs better under these circumstances).

Energy consumption of a pneumatic system will be higher, but with a “smart” design, this can be acceptable, if set off to other costs involved with a belt conveyor.

Calculating and designing a pneumatic conveying system should be done by an expert.

Although the principle of pneumatic conveying is simple, the technology is complex and a design results easily in a wrong design and installation.

The same applies to the designing of a belt conveyor.

May be you have to design both options to find out which one is preferred.

success ■

Dear Arun,

I also posed this question under :

“Dilute or Dense Phase Conveying”

under the

“Pneumatic Conveying” section.

Also visit http://www.erpt.org/014Q/rhoe-00.htm

for the definition of dense phase and dilute phase pneumatic conveying.

The “Zenzdiagram.zip” file shows a calculation from dense phase to dilute phase with a single calculation algorithm.

All for now ■

Dear Arun,

Your design needs extra input data:

- pipe routing (length, vertical horizontal, angle)

- number of bends.

Then a calculation program (Ask mr Agarwal) will give you the pipe size, air volume and required pressure.

Then the feeding system has to be chosen and designed as well as the receiving installation with the air/product separation.

Asking a quotation from a well known supplier might also be a good idea.

At least you will have a guarantee.

success ■

The economics of an air slide system with vertical elevator versus a straight pneumatic conveying system can easily be performed once the full parameters are known relative to the installation.

If you are interested in having such a study and anaylsis performed, please e-mail me directly to the address below and I can forward you a data sheet to complete which will provide the necessary information to perform the study.

Regards ■

dear arun,

As I understand it correctly,

you are considering to replace a working airslide system with elevator, by a pneumatic conveying installation.

The pneumatic conveying installation will certainly use more energy per ton.

Replacing this system by a pneumatic system involves an investment, which has to be returned by economic savings.

As you are transporting 70 tons/hr, give us the conveying length (horizontal, vertical) and the number of bends.

Also the particle size distribution is needed.

Assuming the fly ash is dry.

Then an indication, whether to change your installation (or not) can be given.

best regards. ■

Teus

The existing system is a mechanical belt conveyor system and the question is whether to use air slides and elevators vs straight pneumatic pipeline system.

Jack ■

Dear Baldev & Arun,

Can you tell me who are the leading pneumatic conveying and injection technology providers for:

1. Cement

2. Iron & Steel

3. Non-ferrous (Copper, Alumnium & Zinc) industries

in India?

- Shan ■

You may also like to refer to my article "Theory and Design of Pneumatic Conveying Systems", published last year in the Powder Handling and Processing magazine. This article is a simple tool to design and run calculations on pneumatic conveying systems. All it requires is an understanding of basic Excel.

Amrit Agarwal

Consulting Engineer

Pneumatic Conveying Consulting

Email: polypcc@aol.com

Ph and Fax: 304 346 5125 ■

have any calculation for dense phase ■

Nit,

Please send me an email at the address given above. Thanks,

Amrit Agarwal ■

Dear All

we have Manufacturers and suppliers of complete range of reliable Ash Handling Equipments & Developers of Reliable Ash Handling Systems in India and abroad since 1970. We offer various proven types of Ash handling systems including Wet type Bottom Ash Handling System, Vacuum type Ash Handling Extraction System, Dense Phase Pneumatic Pressure type Fly Ash Conveying Systems as well as Ash Slurry Disposal Systems. Civil, Structural & Piping work has also been done by us as a part of Ash Handling System.

Components Pioneers and 70% of Market share in Ash Handling in India. More than 152 Plants Installed for more than 37000 MW Power Plants in India and abroad. we are expert in Preparation of project reports for new and extension of Ash Handling Plants. Turnkey contracting of ash handling plants from concept to commissioning. Renovation and modernization of existing ash handling plants. Complete operation and maintenance services for Ash Handling Plants Supply of genuine spare parts for all existing Ash Handling Plants

Some challenging ash handling plants executed by Indure are

(1) 4x210 MW (4x120 TPH ash) National Capital Thermal Power Plant at Dadri in 1992 as the world’s largest PLC based fully automated ash extraction and conveying system with vacuum-cum-pressure conveying of ash to silos at a distance of over 1 km

(2) OBRA Stage-II &III (5x200 MW) in 1980, as one of the largest ash system and first 200 MW unit in India.

(3) NTPC Ramagundam Stage-II (3x500 MW) in 1989, as one of the largest capacity, 500 TPH ash, PLC based, fully automated ash handling system.

(3) APSEB Vijayawada Stage-II & III (4x210 MW) in 1990 and 1994 respectively, as one of the most efficient (PLF 94%) fully automated, PLC based ash handling system with 180 TPH ash per unit capacity

For more details; please visit our website: www.desein.com

With regards,

Nit Chandra

Project Engineer

Desein Indure Group

New Delhi

Phone No. +91-011-41891412

Fax No. +91-011-6238393,6469566

E-mail: nchandra@deseinindure.com ■

we believe in quality not quantity.

our performance speaks itself

thanks and regards

sachin kumar arora ■

you better understand about this quality then we r doing quantity

BR

Nit Chandra ■

Sachin and Nit

You both are relatively new to this forum.

The fundamental purpose is to share experiences and education in helping others to solve their problems.

Along the way, if an opportunity presents itself that someone can offer a commercial solution, that's acceptable as well but it's then usually handled direct between the two parties, not through the open forum.

I can't speak for the others who participate but I would respectfully request you keep your competitive commentary between the two of you in private communications and not waste the time of those who look to the forum as an asset of knowledge.

Thank You ■

i will try to take care in future.

■

daer all ,

i will also take care for the same in future and wuold like to apologise for whatsoever disturbance/inconvenience i had caused to anybody

regards

sachin ■

Dear Sir,

Pl send me the article to my email: RAVIINVEN@GMAIL.COM

Regards,

Ravindranath B

Originally Posted by Amrit Agarwal

Arun,

My article "Theory and Design of Pneumatic Conveying Systems" gives the Excel-based calculation method for designing dilute phase pneumatic conveying systems. If you know basic Excel, this method is simple to use. You can use it to design your fly ash pneumatic conveying system. Send me an email if you want a copy of this article.

Regards,

Amrit T. Agarwal

Consulting Engineer

Pneumatic Conveying Consulting

Email: polypcc@aol.com

Ph and Fax: 304 346 5125

■

Dear Sirs,

let me add some information on the pneumatic conveying of fly ash.

From published data of industrial conveying lines I developed "a sort of" universal diagram for the rough estimatimation of flow conditions using parameters of the turbulent flow through pipelines. You will find it in my software program, that can be downloaded from the link given in my thread

Software Estimates Bulk Solid Behaviour

https://forum.bulk-online.com/forumd...ftware-Aspects

In the program's section "Pneum. Förderung" using the "Hilfe"-button you can find the diagram and the the possibility to extrapolate or interpolate parameters for three characteristic conveying states.

Regarding the transport of fly ash the entered operating point of 50 t / h is of special interest. The dataset comes from an industrial plant: pipe diameter - 200 mm, conveying distance - 1200 m, pressure drop - 3.5 bar, gas flow rate - 4000 Nm3 / h. As you can see, the operating point is situated at the border of the stable dilute phase state. The published values in this case are completely confirmed by the calculation.

Kind regards

Manfred Heyde ■

Dear All

we have Manufacturers and suppliers of complete range of reliable Ash Handling Equipments & Developers of Reliable Ash Handling Systems in India and abroad since 1970. We offer various proven types of Ash handling systems including Wet type Bottom Ash Handling System, Vacuum type Ash Handling Extraction System, Dense Phase Pneumatic Pressure type Fly Ash Conveying Systems as well as Ash Slurry Disposal Systems. Civil, Structural & Piping work has also been done by us as a part of Ash Handling System.

Components Pioneers and 70% of Market share in Ash Handling in India. More than 152 Plants Installed for more than 37000 MW Power Plants in India and abroad. we are expert in Preparation of project reports for new and extension of Ash Handling Plants. Turnkey contracting of ash handling plants from concept to commissioning. Renovation and modernization of existing ash handling plants. Complete operation and maintenance services for Ash Handling Plants Supply of genuine spare parts for all existing Ash Handling Plants

Some challenging ash handling plants executed by Indure are

(1) 4x210 MW (4x120 TPH ash) National Capital Thermal Power Plant at Dadri in 1992 as the world’s largest PLC based fully automated ash extraction and conveying system with vacuum-cum-pressure conveying of ash to silos at a distance of over 1 km

(2) OBRA Stage-II &III (5x200 MW) in 1980, as one of the largest ash system and first 200 MW unit in India.

(3) NTPC Ramagundam Stage-II (3x500 MW) in 1989, as one of the largest capacity, 500 TPH ash, PLC based, fully automated ash handling system.

(3) APSEB Vijayawada Stage-II & III (4x210 MW) in 1990 and 1994 respectively, as one of the most efficient (PLF 94%) fully automated, PLC based ash handling system with 180 TPH ash per unit capacity

For more details; please visit our website: www.desein.com

With regards,

Neet Chandra

Project Engineer

Desein Indure Group

New Delhi

Phone No. +91-011-41891412

Fax No. +91-011-6238393,6469566

E-mail: nchandra@deseinindure.com ■

Dear all,

we are in ash handling design and supplies the complete range of the same with a difference , the difference of innovation i.e with every new system we improve, as we learn not from others mistakes and our experience i.e wheather it is a lean phase , a dense phase or a bottom ash handling system , we not only deign it but prove it.

for more imformation visit our website:

www.energoindia.com

With regards,

sachin kumar arora

Project Engineer

Energo Engineering Projects LTD

New Delhi

Phone No. +91-011-26385323

Fax No. +91-011-26385333

E-mail: sachin@energo.co.in

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