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Interested in companies that would like to bid on mixer-settlers of similar size and performance.

Multi-Stage mixer settlers with wetted surfaces fabricated from ptfe

The project is interested in procuring six (6) mixer-settlers with total nominal flow rates ranging from 1 to 400 liters/hour. The contactors are ideally suited to solvent extraction process development work, as continuous, stage-wise, counter-current contact is achieved. Samples of each phase may be withdrawn from each settling chamber facilitating construction of phase equilibrium diagrams.

Requirements:

• Internal recycling of either phase in each stage.

• Intermediate inlets and outlets at each stage such that either the light or heavy phase may be fed into or routed out of the battery as desired.

• Various selectors, plugs, and connectors that allow operation of the required number of stages in a given battery and allow the division of the battery into several sections for extraction, scrubbing, stripping, etc.

• Construction materials include polyethylene, polypropylene, polyvinylidene fluoride, and PTFE.

• Capability for inter-stage recycling, and intermediate inlets in each mixing chamber and intermediate outlets on each settling chamber. Allowing the option to operate a 4-stage module as a 1-, 2-, 3-, or 4-stage extractor, or to have 2 stages of extraction and 2 stages of stripping, or 2 stages of extraction with 1 stage of scrubbing and 1 stage of stripping; among other process arrangements.

Electronic Equipment:

• Electric Motors

o Each mixer is driven in rotation by an individual motor (41 W), top mounted type RE035G/PLG 42S.

o Voltage 24 Volts DC.

o Variation of motor speed to adjust and optimize mixing rotation speed.

o Connecting cable between motor and control rack is 3 meters in length.

o Each motor is supplied with a purge inlet.

• Main Power & Control Panel

o One control module to control the four-stage mixer-settler, comprised of:

o Main switch

o Speed digital display and setting by push buttons + or –

o Speed regulation card to adjust motor speed and optimize mixing agitation and pumping as a function of the process characteristics.

o Power supply: 115/230V – 50/60Hz single phase.

Features Included:

• Sight glass at the end of each settler to view the interphase position.

• Ability to independently adjust the position of the interphase in each settler.

• Adjustable mixer speed using an AC variable frequency drive.

• Adjustable clearance between the bottom of the mixing turbine and the top of the inlet draft tube (pump-mix design).

• Metallic and plastic coalescence grids can be placed in each settler depending upon the choice of the continuous phase.

• Covers to minimize solvent losses due to evaporation and to reduce thermal loss.

• mixer-settlers equipped with DC electric motors that have an air purge inlet.

Dimension limitations

640 mm x 405 mm x 425mm