 |
|
Advanced Membrane
Technologies |
|
|
|
|
|
|
|
|
 |
| Membrane Electrolysis |
DESCRIPTION
Membrane electrolysis (ME) is a membrane process driven by an
electrolytic potential.
 It
is used for the removal of metallic impurities from plating,
anodizing, etching, stripping, and other metal finishing solutions.
This technology uses an ion exchange membrane and an electrical
potential applied across the membrane. The membranes are
ionpermeable and selective, permitting ions of a given electrical
charge to pass through. Cation exchange membranes allow only cations,
such as copper or aluminum to pass through, while anion exchange
membranes allow only anions, such as sulfates or chromates to pass
through.
FEATURES
▪ Maintains process solutions for
consistent performance and quality
▪ Maintains solutions for constant production rates
▪ Accurate, high-quality etching and chrome conversion coating
results
▪ Reduces reject rate (reduces reprocessing)
▪ Reduces wastewater treatment and waste disposal
▪ Reduces fresh process solution usage
APPLICATIONS
Exergy’s ME technology offers significant benefits to industries
using plating, anodizing, etching, stripping, and other metal
finishing solutions. Typical applications include:
▪ Purification and regeneration of chromium plating baths
▪ Recycling and maintenance of chrome conversion coating solutions
▪ Reactivation and metal removal from deoxidizing solutions
SYSTEM COMPONENTS
The ME system is a modular, automated system mounted on a stainless
steel skid with wheels. The system includes high-quality, heavy-duty
components:
Process Equipment
▪ Membrane electrolysis module
▪ Anode compartments including anodes, membranes, inflow assembly,
and electrical
connections
▪ Filter cartridge for anolyte and catholyte feed
▪ Storage tank and pump for anolyte and catholyte solutions
▪ Piping and valving for anolyte and catholyte cycle
▪ Feed and drain assembly
Electrical / Instrumental & Controls
▪ Electrical control panel including microprocessor (PLC) and
operator interface unit
▪ Rectifier
▪ Temperature switch overheating protection and level controls
▪ Bus bars with electrical connections for rectifier
▪ In-line catholyte control unit and in-line anolyte control unit
OPTIONS
Exergy’s ME systems can be customized with optional components, or
custom ME systems can be provided to meet special plant
requirements. Options include:
▪ Multi-cell ME to enhance capacity
▪ 3-compartment cell for special applications
▪ Selective membranes
▪ Custom electrodes (special and noble metals)
▪ Materials of construction options (SCH 80 PVC, PP, PVDF)
▪ System automation options
▪ In-line instrumentation and control options
|
|
|
