×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Sodium carbonate pipe max velocity recommendation
3

Sodium carbonate pipe max velocity recommendation

Sodium carbonate pipe max velocity recommendation

(OP)
Dear all,

I have to size a pump wich discharge sodium carbonate (other name is soda ash),design parameters are: T°=122°F, density = 1147 kg/m3, %solid = 0.001 wt%.

My doubs is about pipe velocity consideration.
For the moment, I'm considering set max pipe velocity at 9.2 fps.

I looked for a handbook in web sites with velocity recommendations for sodium carbonate, but i couldn't found.

I'm worried about corrosion effect in stainless steel pipes (client stablished pipe material).

Can anyone help me to find a handbook online refference to design correct velocity pipe ?

RE: Sodium carbonate pipe max velocity recommendation

Stainless steel should be acceptable since carbon steel is also used, but watch the temperature of the slurry. Keep it below 130F

Like any aggressive slurry, you should size your piping for a maximum velocity of 3-5 fps



MJCronin
Sr. Process Engineer

RE: Sodium carbonate pipe max velocity recommendation

The slurry storage tank should be insulated and equipped with heating operating coils to maintain a temperature between 115-130°F.
https://www.solvay.us › en › binaries › Soda_Ash_Conversion_Guide-237418.pdf


Sodium carbonate is not particularly aggressive and 4-6 ft/sec is a typical velocity for a slurry. Sodium carbonate dissolves almost cmpletely in the slurry.

See page 6-9 for a piping diagram.

RE: Sodium carbonate pipe max velocity recommendation

Hi,
To me it has to do with erosion , are you sure about the solid content , seems very low !
My experience with soda ash and bicarbonate is the following : 10 m3/h of a 10% w/w aqueous solution in a 2 inches pipe (CS or SS ).
Pay attention to the solubility .
Good luck
Pierre

RE: Sodium carbonate pipe max velocity recommendation

"Crystals in the tank rapidly settle from the liquid, which is decanted from near the surface and recirculated to make up fresh slurry. Clear saturated solution for use is similarly decanted, although a brief settling period is needed after unloading to avoid turbidity. As supernatant solution is withdrawn, it is replaced with water through a perforated pipe manifold in the bottom of the tank. The water dissolves the sodium carbonate crystals as it rised through the slurry bed. Table 6-2 shows that a 30,000-gal. storage tank can hold 48 tons of soda ash as saturated solution and up to 116 tons as an 80% slurry."

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close