Powder dosing into a pressurized vessel

[SR2211]

Hello,

We feed powder into a vessel (vessel pressure slightly atm) through a funnel with a long pipe (7m length) and at times
due to the slight over pressure of the vessel, the powder is not strong enough to flow and is thrown out.
What are the possible solutions to depressurize this pressure before feeding into the vessel or to avoid such scenarios.
A pneumatic conveying system would be ideal but we dont want to go for a high end solution.

thanks

 

[jari001]

I also thought we were discussing the internal vessel environment (I didn't think these ratings could apply to areas outside of equipment!) You should ask for clarification on this matter from the site EHS group, if for no other reason than to be properly informed what hazards you are exposed to (which is your right if you are in the USA). Something is, in fact, fishy.

 

[SR2211]

Hello all,
The vessel is Zone 0 (under the circumstances when the lines are completely filled with the chemical substances), but in the process which i mentioned above, happens only, when the vessel is empty and the lines are drained completely. So it is Zone 0 during normal operation, where we dont expose any lines to atmosphere or Oxygen opening a valve.

 

[Jobst]

What's stopping you stretching some kind of sock filter over the top of your funnel?

 

[glsinfo]

We manufacture glass lined batch reactors and this the technology we use to charge solids while maintaining a N2 purge of the vessel and eliminating operator exposure to dust/solid & fumes.

http://www.ddpsinc.com/powderpump