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HCCL-Series Heater / Cooler / Classifier
The process of
controlled heating, cooling, and classification of
material passing through this unit is achieved by
the balanced use of air from a supplied blower and
heated or cooled water in the form of a heat
exchanger bundled designed integrally in the unit.
This ensures that the material being discharged from
the unit is not only at the temperature best suited
to the customerís operation, but is also free of
dust and matches the desired grain distribution of
classifier is constructed from four major
- A base, or plenum
chamber, into which fluidizing air is supplied
by a blower.
- A fluidizing deck,
construction of ASTM A-514 Abrasion Resistant
- A heat exchanger
- A main body, which
serves as a cover and pressure chamber
The plenum chamber serves not only as a base, but also a means of distributing the incoming air to the underside of the fluidizing deck. The deck is an abrasion resistant steel plate containing self-cleaning orifices through which the air is passed through in order to fluidize the material resting on it. The fluidization orifices are covered with abrasion strips which prevent material from falling into the plenum. The fluidization action brings each grain of material in intimate contact with the the heat exchange bundle, which is mounted on top of the fluidizing deck and is made up of steel tubing mounted in close proximity between two water manifolds. The main body is mounted on top of the base (plenum chamber) and over the heat exchanger bundle. It serves not only as a cover, but also as a heating and classifying chamber.
The fluidizing action
of the material not only contributes to heating and
cooling, but also polishes each grain, removing the
dust and fines that exist naturally in the material
source as well as those created in the
transportation of the material to the HCCL. A
negative pressure maintained over the bed by a dust
collector (supplied by the customer or as an option)
and controlled by a dam gate located between the
dust collector and the heater/cooler/classifier
ensures that all the dust and fines are removed from
the chamber and around the material grains.
air is provided by a constant pressure blower driven
by a TEFC motor that includes an inlet damper
control. Inspection and cleaning panels, flanged
discharge, dust collection, and air manifold
connections are included. The fluidizing air blower
can be mounted on either side of the
heater/classifier to suit the customerís layout.
is regulated using a high quality butterfly style
inlet valve. This valve actuates at the initiation
of the cycle to meter material into the unit. The
concept of fluidization imparts that for every pound
of material poured into the unit, one pound will
come out. The purpose of this valve is not only to
meter the material, but also to shut off the
material supply at the end of the cycle. This
ensures that the classifier body does not pack full,
maintaining consistent fluidization pressures and
Heating water is
supplied to the heat exchanger from a natural gas
hot water boiler, unless otherwise specified. The
boiler coupled with standard high resolution
Honeywell temperature controller ensure constant
exit temperatures even on the coolest day. An
atmospheric hot water natural gas heating boiler is
supplied as standard equipment.
water as standard would be supplied from city or
natural well water. However, the system is easily
adapted to include cooling tower or chiller
controls. Temperature in cooling mode is controlled
by the same Honeywell controller as is used for
heating, simplifying controls and operation.
The standard control
system includes all components necessary for the
operation of this unit. All primary operating
components are Allen-Bradley, the control
transformer is ACME, and the temperature controller
is Honeywell. These components are all off-the-shelf
and available from high quality industrial and
electrical supply houses.
A modulating valve,
included as standard, regulates the flow of either
cooling or heating water to the unit. This
regulation is controlled automatically using a PID
control loop. The closer the material is to the
desired process temperature, the less water will
flow through the heat exchange bundle. The heating
system is closed loop as standard. The cooling
system, if using city water is either sent to drain
or to cooling tanks. With the optional cooling tower
or chiller package, the cooling loop is closed as
well, minimizing water consumption year round.
unit comes standard with all control logic necessary
for the automatic switching from heating to cooling.
Hardware for this
(electrically actuated diverter valves) is optional.
Generally, all system valving and piping to the unit
is customer supplied as all shops have different
preferences for brand, type, routings, etc.
A rotary style level
indicator controls the operation of the unit.
Located in the discharge hopper, the HCCL seeks to
maintain a full state. A run time timer initiates
when the level indicator is clear. This insures that
a certain surge capacity is always available.
- Tonnage and
thermal transmission rates are based on silica
material (50-75 AFS).
Parameters: 45 degrees Fahrenheit Incoming to 85
degrees Fahrenheit Discharge (Controlled) -
Heating Energy Source - Natural Gas Hot Water
Parameters: 105 degrees Fahrenheit Incoming to
85 degrees Fahrenheit Discharge (Controlled) -
Cooling Energy Source - City Water at 65 degrees
System Tons Per Hour Based on Silica Sand and
General Specifications Above
Butterfly Valve Size
Pump GPM (Cooling Water)
- Cooling Tower View
- Custom sizing for
specialty materials and installations