Application example:

Powder addition

into continuous inline mixtures

Problem:
How to add powders and blend them into fluids inline with dosing accuracy against a back-pressure

Solution:
An integrated dosing, pumping and mixing system from Maelstrom

High accuracy powder inclusion

No feed clogging or jamming 

Can dose reliably against a high back pressure

Application example:

Powder addition

into continuous inline mixtures

Problem:
How to add powders and blend them into fluids inline with dosing accuracy against a back-pressure

Solution:
An integrated dosing, pumping and mixing system from Maelstrom

High accuracy powder inclusion

No feed clogging or jamming 

Can dose reliably against a high back pressure

Paste  >  Pressurise  >  Blend

Problem description

The difficulty of adding powders and other granular solids to inline fluid systems is common to many applications.  Existing eduction and vacuum systems that rapidly draw powder into pumps or rotor-stator mixers work for uncontrolled addition into low viscosity fluids, but they do not work well for high viscosities or where powders must be continuously dosed as part of a recipe.

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Maelstrom solution

The key to Maelstrom's solution is a 3-step approach to powder addition:

    1. Meter the powder using an accurate volumetric or loss-in-weight feeder into an EMT mixer and form a paste with some of the recipe liquid, delivered via a metering pump;

 

    1. Pressurise and inject the paste into the main fluid stream using a Maelstrom EPS pump; and

 

    1. Blend the paste using one of Maelstrom's rotor-stator mixers with other recipe ingredients.

The advantage of this approach is that the powder is transformed into a pump-able paste by the EMT so that it can be injected in a continuous and controlled way by a high-pressure, pulseless EPS pump.  Forming a paste rather than trying to inject the powder directly has enormous process benefits, including:

  • No difficult start-up or shutdown procedures to avoid liquid creep back into the bulk powder
  • Easy cleaning (due to the self-wiping screws of the EMT)
  • Ability to pump against very high back pressures (hundreds of bar) without compacting the powder
  • Ability to handle difficult, sticky, abrasive and hazardous powders
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