Using a "quick sizing spreadsheet" for a pneumatic conveying system is a sure road to a disaster just waiting to happen -especially if you don't understand the fundamentals of what is taking place.

talk to a supplier or a consultant to help you plan your project correctly

Regards ■

Dear Adatta,

you can´t say anything about the pipe diameter without any data.

First of all, how do you want to convey the material?

Through a rotary valve or by vessel system from truck or others ?

What is the capacity you want to convey each hour

and how many ellbows you have in the pipe ?

Last but not least, tell us about the length ( horizontal and vertical ) of the pipe.

If you can send me this information we can give you more information about the pipe diameter.

We can also quote you complete systems for the conveying of your materials.

Best regards

Bernd ■

Dear Bernd Sauer

Please help on the follwing

Material to be conveyed : Fly Ash

Rate of COnveying : 45 TPH

Mode : Continuous ( Two Vessles)

Horizontal Distance: 600 mtrs

Verticle distance : 50 mtrs

No of Bends: 8

Bulk Density of Fly Ash : .8 t/cu m

I Hope with above data , you will be able to give me air required, Pipe size, Vessle size etc.

Thanking you in anticipation

Arun ■

Dear Mr Arun Sabharwal,

Please find a PRELIMINARY design for your installation based on a fly ash with a

particle size of 30 microns and a floating velocity of 1.29 m/sec.

Your fly ash may be completely different.

Because of the long distance, big tanks are required, to minimize the purge time between vessels.

Preliminary design

ARUN SABHARWAL arun d 12-03-2007

Pressure discharge Fly-ash

Convey length = 650 m

Nu of bends= 8

Pump vol = 0.45 + 0.45 m^3/s

q-convey = 0.45 m^3/s

Dia begin = 193 mm

Dia end = 243 mm

Kettle volume = 15.0 m^3

Fly-as vol.= 12.0 m^3

C-Vessel = 500 tons/hr

Kettle Fly-as content = 9.6 tons

Pipevolume = 22.72 m^3

----------- Pipeline--------Syst. /Nr of

Press-----. Cap----mu----Cap. /kettles -- v-begin-----v-end------kWh/ton-------res.time

2.500------56------30-----45 / 4.6 ---------5.4----------11.4----------1.75----------99.55

2.250------53------29------43 / 4.4-------- 5.8----------11.3----------1.68---------- 94.79

2.000------50------27------42 / 4.3---------6.3----------11.3----------1.60----------89.94

1.750 ------47-----25------40 / 4.1 --------6.8----------11.3----------1.53----------84.97

1.500------43------23------37 / 3.8--------7.4----------11.3----------1.47----------79.83

1.250------39------21------34 / 3.5---------8.2----------11.3----------1.41----------74.57

1.000------34------18------30 / 3.1-------- 9.2----------11.2----------1.38----------69.07

0.750------27------15------25 / 2.6--------10.5----------11.2----------1.40---------- 63.24

0.500------18 -----10------17 / 1.7--------12.2----------11.2----------1.69----------56.74

0.250------1.3------1--------1 / 0.1---------14.9----------11.1----------16.55----------49.26

Empty pipeline pressure ...= 2233.9 mmWC

Maximum system capacity : 45 t/hr 2.5 bar(o)

For a real project consult a pneumatic conveying equipment supplier and submit the supplier a sample of the fly ash.

Take care

teus ■

Mr. Teus Tuinenburg

Thanks for the help

Regards

Arun ■

Dear Teus Tuinenburg

can u let me have the software, formula or excel aheet where ican orient my self to know the air requirement whin iam having all necessary inout that may require to calculate for the same

input having

1 bulk density

2 bend

3 convey mtr(horizontal+vertical)

4 particle size]

5) temp of ash

waiting for your valuable reply ■

Dear rahul,

The software is is not for publication nor sharing.

But for orientation, the program and article of Mr Awargal is advised.

best regards

teus ■

I always thought Mr Agarwal article was limited to lean phase ! ■

dear Mr Mantoo,

The subject dense phase and dilute (lean) phase is discussed before in this forum.

The definition (more or less) accepted was:

Left of the lowest point in the appropriate Zenz-diagram was regarded as dense phase and right of the lowest point in the Zenz diagram was dilute phase.

Whether my calculation is dense- or dilute phase in the Zenz diagram, I did not check.

Whether mr Awargal's article is valid left of the lowest point in the Zenz diagram is best answered by mr Agarwal himself.

have a nice day

teus ■