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TFS Products

TEP™, Ultra-pure Operation
TEP, Air Operation
Automated Foam Index Technique (AFIT™)

TEP™, Ultra-pure Operation

TFS offers TEP systems for purifying 2-850 µm sized powders. Shown at left is our 200 lb/hr TEP Systemplatform and separator for ultra-pure operational conditions. It is constructed using 304 stainless steel; pipes and tubing connect with compression fittings; noble or other purified gases transport the powder from a stainless steel feeder through the electric field separation zone and on to product collection. Laboratory-scale systems having feed capacities as small as 10 lb/hr are available. The system is scalable up to feed capacities of 1000 lb/hr; its effective footprint is 12 feet x 15 feet.



TEP, Air OperationTEP, Air Operation

TEP systems for operation under normal air conditions and in either vertical or horizontal orientation are also available. The latter optimizes purification for mixtures having large differences between particle densities. A vertical orientation, 10 lb/hr separator cell is shown at the right. Although it does not include HEPA filters for co-flow air treatment, filtering can be accommodated if required. The usable particle size range is 2-850 µm, and it is scalable up to 1000 lb/hr feed capacities.


Automated Foam Index Technique (AFIT™):

Photo of AFIT instrumentThe AFIT™ instrument quantifies the dynamic foaming properties of air entraining agents, surfactants and foaming materials.  It makes these measurements without intrusion of a probe or device into a working environment.  Appropriate foam stabilities are necessary for proper performance of the materials onto/into which AEA’s or surfactants are applied.  Stable foams have stable bubbles; unstable foams have breaking bubbles.  When bubbles break they produce unique acoustic signatures, the dynamic properties of which are measured by the detectors incorporated into the AFIT™ instrument.  The outcome is quantitative, repeatable foam index values and foaming measurements.

For example, the following Figures show linearly increasing foam index values as the amount of a coal combustion ash increases in cement-ash mixtures and as the amount of a high foam index coal combustion ash is increased in ash-ash mixtures.  The time required for each data point within these figures is near 15 seconds.

A graph showing the foam index values of cement and ash mixtures. The foam index is shown to rise from below .2 at zero percent ash to over .9 ml at 100% ash.
Foam index values of cement-ash mixtures.


Graph of foam index values of Ash 1 and Ash 2 MixturesFoam index values of ash-ash mixtures.


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