Dear Luca,

Are you referring to pressure vessels, which are used in pneumatic cement conveying as feeder systems?

Have a nice day

Teus ■

Dear Luca,

The structural integrity of a pressure vessel is straightforward and has to comply with the local and ruling regulations.

The design calculation can f.i. be done according TUV-regulations.

Important in this calculation is:

- Working pressure range (Sometimes a pressure vessel is filled under vacuum)

- Test pressure

- Number of pressure fluctuations during the expected lifetime of the vessel (Fatigue stresses)

- Working temperatures

- Wall thickness increase for wear.

- Inspection certificat

Depending on the application, the vessel will have:

- Inlet nozzle with flange

- Outlet nozzle with flange

- Convey air supply nozzles with flange

- Manhole

- Measuring points

- Level tester socket

Special attention must be paid to the outlet/fluidization geometry.

If this configuration is wrong, it might be well possible that the designed conveying pressure (# capacity) is not reached, because the cement outflow is insufficient.

(Not seldom the case)

Success

Teus ■

Dear Luca,

You are welcome.

I doubt, that there are drawings on the internet.

To see some pictures, look at:

http://www.flsmidth.com/Kovako+Mater.../Frontpage.htm

If you supply more data, you have available at this moment, more information can be exchanged.

If you like, you can use the private messaging function of this forum.

Have a nice day

Teus ■

Dear Luca,

The picture shows some pressure kettles for the pneumatic conveying of cement or barite.

If their final destination is to be installed on a boat, I assume that will be a supply vessel for transporting barite to drilling rigs for the production of drilling mud.

You say that the content of this tank of 30 m3 is pneumatically transported to a tank of only 1 m3.

That small tank also needs a dust separation system to clean the conveying air.

It is hard to believe, that after only 1/30 of the content is transported, the pneumatic conveying must stop.

Check this again.

The used steel for the fabrication of these type of vessels is a higher grade mild steel (f.i. St52-3).

With a proper painting system, the kettles are protected against the marine environment.

Before designing the controls of the valves, a flow sheet of the whole system must be made, in which it becomes clear how the vessel(s) is (are) pressurized, fluidized, de-aerated and discharged.

A pneumatic conveying calculation is also required.

Then a logical flow diagram of the control system can be made, in which the control steps and step conditions (level- and pressure levels) are represented.

What is the scope of the cement silos you have to study?

In my opinion, it is very important that students are assisted in their studies.

However, that requires well-defined tasks from the university that reflect the knowledge of the professor and contains the necessary basic pre-information about the intended technology (It is not clever to start from scratch and spend too much time on searching in the dark)

Have a nice day

Teus ■