In 1992, the Nearfield Acoustical
Processor replaced the RUM Reactor. In 2002, there was another
technological breakthrough which led to the development of the Dual-Frequency
Reactor. We also have larger and more efficient transducers capable of
tolerating brownout periods. If needed, we can still provide the RUM and
With Generators, our Adjustable Power Control
Generator (APC), is the preferred choice due to superior power control circuits
and the ability to operate during brownout conditions too. However, our
Automatic Gain Control Generator (AGC) is still available upon request.
Dual-Frequency Processor is a powerful continuous-flow Dual-Frequency
Reactor. This parallel diaphragm plate configuration provides intense acoustic
activity for demanding sonochemical and/or sonophysical reactions.
The DFR Reactor produces a uniform sound field of intense
ultrasonic cavitation which maximizes the reaction kinetics within the linear
space allotted. The sound energy produces drastic process rate changes and
quality enhancements down to a molecular level. Controllable ultrasonic
parameters enhance chemical process methodologies and
Platesform a single ultrasonic reaction chamber which concentrates
the sound energy from these independent sources. The reaction chamber is
where the process solution flows through in order to be ultrasonically
treated. This configuration produces an absolutely uniform energy profile
for complete and thorough treatment of all material passing through.
The DFR Reactor is effective for:
Particle fragmentation and deagglomeration. Increased
instantaneous particle velocity improves surface wetting and liquid/solid
Agglomerated particles are pried apart for chemical
activation of new surfaces. Every particle is individually scrubbed
down into the sub-micron size domain.
Micro-emulsions decrease the emulsifying agents
required for stability.
Reduce operating costs and enhance operation
efficiency. Reductions in raw materials due to molecular mixing.
Drastic increases in mass transfer rates &
Improved process reliability.
Dual-Frequency Processor Features include:
Ultrasonic hardware that provides continuous processing
performance year after year. Reliable and durable systems made with
silver-brazed magnetostrictive transducers. The acoustic output
performance will not degrade nor change with time for this ultrasonic
Many transducers are driven synchronously to produce a
uniform energy intensity on each diaphragm plate. The inertia produced
by our massive transducers is insensitive to fluctuating process parameters
which can suppress acoustic energy transmission and system performance.
Many generators are synchronized to drive our high
capacity NAP Reactors. Large systems deliver high-throughput performance for
the most demanding installations. The NAP
Reactor's design and construction techniques assures reliable system
performance. There are no moving components that can create process
We have included a brief review of the physics
within our DFR Reactors.
The DFR-3606-HP with a 1kg Transducer.
This 4kW DFR Reactor is shown next to a typical
transducer element used within our 6 inch wide reactor series. Each
transducer is silver-brazed to the diaphragm plate for an acoustically perfect
junction. We warrantee the performance of our transducer assembly for
The DFR-3606-TCC with an
This DFR Reactor is equipped with our Thermal
Controlled Core Option, (TCC equipment series). The Inline
Spacer allows the process solution to pass through the ultrasonic chamber for
effective and uniform material treatment. The inline system is easy to
install in existing flow streams.
The DFR-3606-HP-TC with a
NEMA-12 Generator/Electrical Enclosure.
Control feature provides stable reactor temperature control from -10° C
to 150° C. The processing chamber's temperature is maintained by heat
transfer fluid flowing through internal manifolds located inside the
transducer covers. Hot fluid may be used to quick start the system upon
startup or for high-temperature operating conditions.
The ultrasonic generators are located inside a NEMA-12
Electrical Enclosure, (aka. IP55). This system is provided complete
with isolation transformer and flanged mount disconnect switch. The
ultrasonic reactor may be remotely activated and monitored by your process
computer control network.
A DFR-1808-TC with a Sparged Reaction Cell mounted in a
Sound Abatement Enclosure.
This High Temperature DFR Reactor is equipped
with a dual-port Sparged Reaction Cell. The primary feed is located
below the ultrasonic processing chamber. The secondary feed is
positioned in the ultrasonic mixing zone for instant acoustic treatment upon
initial contact. The ultrasonic intensity is adjustable to control
A DFR-3606-HP mounted within a Sound Abatement Enclosure.
This Sound Abatement Enclosure is equipped with
quick opening doors for instant reactor access. The conveyance line
connections and ultrasonic power cables attach to the outside envelope of the
sound enclosure. The reactor may be easily removed when required.
CE Compliant Systems.
This DFR Reactor is packaged for export to
Europe. The system is delivered completely assembled and wired for the
primary voltage available. We use IEC/EC wiring methodologies to simplify
equipment familiarity and service. The Sound Abatement Enclosure is
mandatory to reduce airborne noise to acceptable levels.
The DFR Reactor can be packaged for quick full
washdown and inspection. The Reactor may be disassembled, separated, cleaned,
inspected and reassembled within minutes. This DFR Reactor and
Generator/Electrical Enclosure are both rated as NEMA-4X, IP66, for full
The Dual-Frequency Processor, M/N: DFR: 10726 Reactor
with variable ultrasonic power control.
DFR Reactor Standard Features: All wetted surfaces are 316L stainless steel and teflon.
Hastelloy systems are available.
Magnetostrictive transducers are permanently silver-brazed to
the diaphragm plate. The ultrasonic output performance
permanent for improved process reliability. Uniform
cavitation achieved throughout NAP Reactor's processing
chamber. The transducers are backed by our
Reactor's Working Temperature: -35° C to 120° C.
(TC equipment series to 150° C) (500° C optional)
Reactor's Working Pressure: Vacuum to 45 psig, (3 bar).
(10 bar optional) Reactor's Electrical Rating: NEMA-4X,
(NEMA-6, IP67 for the TC equipment series) .
Variable ultrasonic power (0% to 100%) with
Generator Enclosure Rating: NEMA-1 or NEMA-12; IP20 or IP55.