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Gentle Handling Dust-Free Elevation, Screw Feeders, Volumetric Feeders
Combination Elevator Volumetric Feeder Heat Exchanger

How the Heat Exchanger Works

Combination Elevator Volumetric Feeder Heat Exchanger
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 Dust Explosion Prevention Vertical Conveyor Video
Vertical ElevationVertical Elevation
Bulk Material Handling SystemsBulk Material
Handling Systems
Dust Explosion PreventionDust Explosion
Prevention
Dust controlDust Control
Mobile UnitsMobile Units
Volumetric FeedersHeat Exchange
with Olds Elevators
Gentle Handling Dust-Free ElevationGentle Handling
Dust-Free Elevation
dense abrasivesDense Abrasives
Volumetric FeedersVolumetric
Feeders
Accurate Volumetric Flow ControlPneumatics versus
Olds Elevators

Heat Exchange with Olds Elevators

It has long been known that Olds elevators could be used as heat exchangers simply by circulating water through the static screw. Only minor modifications to a standard Olds elevator can produce a combination Elevator/Volumetric Feeder/Heat Exchanger, all in the same small footprint.

A recent application of this technology is the cooling of hot flake surfactants during elevation from a dryer to a screener.

Below are examples of the effectiveness of the elevator/heat exchanger at different flow rates handling hot foundry sand (Specific Heat 0.19):

Sand
Flow
lb/min		 Water
Flow
GPM		 Water
Temp In
T°F		 Sand
Temp In
T°F		 Sand
Temp Out
T°F		 Water
Temp Out
T°F		 % Heat
Reduction
Sand
63 2 47 187.5 140.2 61 25.4
96 2 47 189.5 146.0 63 22.9
Questions? Email OLDS ELEVATOR Today! In the case above, tap water was circulated through the hollow shaft of the screw of a 12 foot tall Olds elevator. The screw flighting was continuously welded to the shaft to improve thermal conductivity.

Screws can also be supplied with hollow flights as well as shafts to greatly expand the surface area and the efficiency of the heat exchanger. Residence time in the elevator can also be easily controlled with the Variable Frequency Drive (VFD) that allows precise control of the flow rate of bulk materials through the elevator.

Taller elevators improve the heat exchange rate by increasing residence time in contact with the screw.
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OLDS ELEVATOR™ LLC
12 B Park Ave.
Hudson, NH 03051

Call 603.882.8899
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