Description:
The unit consists of two vertical transparent columns containing the cation and anion resins, mounted on a support frame together with the necessary pumps, valves and sensors. The arrangement of pumps and solenoid valves enables the flow configuration to be changed to demonstrate the various stages involved in the demineralization or water-softening processes. Each stage of the process is selected by the operator using a PC and a mimic diagram for the appropriate stage displayed on the screen. Conductivity, temperature and pH of the influent and effluent of the columns are measured using electronic sensors for data logging. The apparatus is supplied with a typical commercial cation and anion resin, but other ion-exchange materials (not supplied) may be used so that their characteristics, exchange capacity etc may be measured and compared. Union couplings at both ends of the columns enable the column to be easily removed for maintenance and set-up without the need for tools. Regenerate, test and wash solutions are stored in separate containers to avoid cross-contamination, and effluents are fed to a waste-water tank for proper disposal.
Demonstration Capabilities
- Water softening using cationic resin Exchange capacity of a cationic softening system
- Regeneration efficiency of a cationic softening system (regenerated using NaCl)
- Demineralization using two-bed exchange (cationic resin and anionic resin used in series)
- Regeneration efficiency of a demineralization system (regeneration cationic resin using HCl and anionic resin using NaOH)
- Exchange capacities of different resin materials (alternative materials not supplied)
Specification
- Benchtop metal frame unit
- Two vertical transparent columns to house the resins
- Five peristaltic pumps for accurate process control and to prevent liquid contamination
- Two conductivity/temperature probes
- Two pH probes
- Five solenoid valves
- USB port for data logging using software
- Comprehensive instruction manual with detailed laboratory teaching exercises
- Typical commercial cation and anion resins
- Two 1l regenerant bottles
- 25l waste-water container
- Two 10l feed and wash water containers
- Powered by a universal power adaptor with worldwide approval
- Two vertical columns 16mm inside diameter
- Five two-way solenoid valves suitable for use with 10% HCl, 5% NaOH and 10% NaCl
- Four 0-50ml pumps, suitable for use with acid and alkali
- One pump 0-75m
- Two conductivity probes 0-500 mS/cm
- Two pH sensors 0-14pH
Technical Specification:
- 2 x vertical columns: 16mm ID
- Solenoid valves: 5 x Two-way valves (suitable for 10% HCl, 5% NaOH and 10% NaCl)
- Pumps: 4 x 0-50mL (suitable for acid and alkali)
- Pump: 1 x 0-75mL (suitable for acid and alkali)
- PH sensors: 2
- Conductivity/temperature sensors: 2 x 0 – 2mS/cm
- Conductivity probes: 2 x 0 – 2mS/cm
- Regenerant bottles: 2 x 1L
- Waste-water container: 25L
- Feed & wash water containers: 2 x 10L
