Extraction - Liquid/Liquid Pulse Column
A complete teaching system
with comprehensive experiments, data analysis, tutor's and student manuals
if desired, and all instruments and controllers.
- Studies hydrodynamics
and mass transfer in liquid/liquid systems
- Dispersed light or heavy
phase operation
- custom designed for technician/undergraduate
teaching
- Complete visual monitoring
of the process
- Easily operated and used
- No further development
work necessary
- Suitable for project or
research work
Specification
A QVF liquid/liquid extraction
teaching system module comprising a 50mm diameter x 2000mm long pulsed
extraction column with stainless steel perforated plates, 50 liter capacity
light and heavy phase feed and storage vessels, duplex variable capacity
metering pump, and interconnecting pipework, all manufactured in borosilicate
glass. Designed to study hydrodynamics and mass transfer in liquid/liquid
systems. Supplied with all valves, controllers and supporting structure.
Complete with an installation and maintenance manual and tool kit.
Experimental Capabilities
- Observation of light and
heavy phase dispersion, column flooding
- The effect of pulse volume
and throughput on the transition and flooding points
- Determination of HTU
- Influence of liquid flowrates
on extraction efficiency
- Influence of pulse volume
on extraction efficiency
An Iodine/water/perchloroethylene
acid system is used in the experiments. Many other liquid systems can
also be investigated.
The experiments are also
designed to provide training in chemical plant control and operation.
Optional Manuals
The equipment can be supplied
with the following manuals:
Tutor's manual: The
basis of a lecture course on extraction theory and practice. Also including
operating instructions , experiments, typical results and answers to
student questions.
Student manuals provide
the basics of extraction theory and practice with plant operating instructions.
Experimental booklets
provide step-by-step instructions for performing the experiments, data
to be recorded and questions to be answered.
Additional copies of the
student manuals and experiment booklets can be reordered.
Description
The extractor comprises a
vertical pulsed sieve plate column fitted with light and heavy phase
setting zones. Light and heavy phases are pumped continuously from their
feed vessels to the column by means of duplex variable capacity dosing
pump where they are contacted countercurrently.
The custom designed, variable
capacity pulse unit fitted to the column varies the mass transfer rate
within the extraction column by applying shear stress to the passing
liquid streams.
Interface level is controlled
manually using a flexible pipe connection which allows light and heavy
dispersed phase operation to be studied.
The extract and raffinate
are collected in receiving vessels and suitably positioned sampling
points allow samples to be taken for concentration determination of
the phases.
A mimic diagram is integrated
with the equipment and ensures simple identification of valves and recording
of plant variables.
All major process items and
pipework are manufactured from QVF borosilicate glass with other contact
parts in PVDF, PTFE and stainless steel.
Options
Either steam or electric
heating.
Electrical System
The electrical system can
be designed to meet your local requirements.
Equipment Specification
- Extraction column: 50mm
dia x 2000mm long
- Internals: 38 Sieve plates
(stainless steel)
- Receiving (2) vessels:
50 L
- Storage (2) vessels: 50
L
- Metering pump: QVF DN
40A, 0-42 L/hr
- Pulse unit: QVF variable
speed-17 to 150 strokes per minute
Installation and maintenance
manual provides detailed instructions on installing and maintaining
the plant.
Instrumentation
- Water: Control valve,
pressure gauge
- Steam: Reducer, control
valve, pressure gauge
- or Electricity: Phase
angle thyristor power controller
- Process: Temperature indicator,
solvent flow meter
Utilities Requirements
Electricity: 1kW, 220/440V,
3 phase 60Hz
Space Requirements
(height x floor area)
4.5 x 2.0 x 1.0 meters
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