Views: 0 Author: Site Editor Publish Time: 2025-05-23 Origin: Site
Overview
Electrodeionization (EDI) systems from Hebei Huayu Environmental Engineering Co., Ltd generate continuous-flow ultrapure water by combining ion-exchange resins with ion-selective membranes under an applied electric field. This process eliminates the need for periodic chemical regeneration, ensuring stable water quality with resistivity above 16 MΩ·cm and total organic carbon (TOC) below 10 ppb.
Process Description
Feed-Water Preparation: RO-treated water (conductivity < 50 µS/cm) enters the EDI module, minimizing load on resins and membranes.
EDI Module Operation: Alternating cation- and anion-exchange compartments, separated by ion-permeable membranes, allow targeted ion removal. Under voltage, ions migrate into concentrate channels, regenerating resin beds continuously.
Quality Monitoring: Integrated conductivity and resistivity sensors provide real-time feedback. PLC controls adjust voltage and feed flow to maintain target purity while optimizing energy use.
Key Advantages
– Continuous Regeneration: Eliminates chemical handling and downtime associated with conventional ion-exchange systems.
– Consistent Purity: Stable ultrapure output supports applications in semiconductor fabrication, pharmaceutical production, and power-plant boiler feed.
– Reduced Environmental Impact: No acid or caustic regenerants simplifies waste management and lowers chemical costs.
System Design
Skid-mounted or containerized units include feed-water buffering tanks, precision pumps, and DC power supplies. Capacities span from 0.5 to 500 m³/h, with parallel module configurations enabling higher throughput. Touchscreen HMI and remote-access capabilities facilitate setpoint adjustment, alarm management, and data logging.
Materials and Standards
Wetted components use corrosion-resistant plastics or SS316, and electrical enclosures meet IP65 ratings. All materials conform to ASTM and ISO guidelines for ultrapure-water service, preventing leachable contaminants.
Commissioning and Service
Hebei Huayu provides start-up assistance, performance validation, and operator training. Service agreements include periodic inspections, membrane-stack replacement, and remote system diagnostics. Predictive-maintenance algorithms leverage operational data to schedule interventions before quality deviations occur.
