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  1. SR2211

    Powder dosing into a pressurized vessel

    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...
  2. SR2211

    Powder dosing into a pressurized vessel

    Until now its not clear to me, but i suppose there are other hazardous vap/chemicals in other equipment in the same area, which is way this is subjected to Zone 0.
  3. SR2211

    Powder dosing into a pressurized vessel

    Hi, the temperature at the vessel is around 85°C, its a non-hazardous powder, the process is running like this since 30 years or so and no incidents. It is an aqueous process.
  4. SR2211

    Powder dosing into a pressurized vessel

    Hi Moltenmetal and all, Let me add some more details. The vessel is normally at around 900 mbar abs pressure, the valve is located just above the vessel, connected to the dosing pipe (100mm) which is about 7m long, where we feed the fine powder through a hopper (during this process there is no...
  5. SR2211

    Powder dosing into a pressurized vessel

    Hello all, thanks for your replies, i believe so with a slight N2 pressure, it could be resolved. Also, the vented rotary valve with a lock/hopper system, needs to be checked. But since its a Zone 0 classified we need to make sure the effective solution complies within the scope. bye
  6. SR2211

    Powder dosing into a pressurized vessel

    There is no vent line directly above the vessel and the vessel volume is around 10000L. Amount of powder charged is around 100 kg per day and the reactor pressure is around 600 mbarg. Since the powder is very fine, there is a huge volume of air purging upwards and spraying the powder all over...
  7. SR2211

    Powder dosing into a pressurized vessel

    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...

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