Product Overview

This industrial reverse osmosis unit is engineered to maximize permeate recovery and minimize concentrate discharge when treating high-salinity groundwater or process water. By combining multi-stage concentrate staging, intermediate boosting, and automated chemical dosing, the system achieves 80% to 90% recovery rates while mitigating mineral scaling and membrane polarization.

Key Specifications

Parameter	Technical Metric
Permeate Flow Rate	10 to 500 m³/h per skid
System Recovery Rate	Adjustable from 75% to 90%
Feed TDS Range	2,000 mg/L to 10,000 mg/L
Operating Pressure	1.4 MPa to 2.8 MPa
Power Supply	380V/415V/480V, 50/60Hz, 3-Phase

Product-Specific Technical Focus

Concentrate Recycling: Employs split-stream staging to accelerate cross-flow velocity across tail-end elements, preventing localized concentration polarization.

Energy Integration: Incorporates optional isobaric energy recovery devices into high-salinity brine streams to lower specific energy consumption (kWh/m3).

Flux Balancing: Utilizes wider feed spacers (34 mil to 41 mil) in final-stage elements to reduce differential pressure and resist particulate buildup.

Typical Applications

Boiler Feedwater: Deep desalination of hard well water for high-pressure industrial steam generation.

ZLD Pre-Concentration: Volume reduction of industrial wastewater prior to thermal evaporation stages.

Groundwater Desalination: Municipal and agricultural water production from inland brackish aquifers.

Wastewater Reclamation: Secondary effluent reuse in textile, chemical, and power facilities.

How It Works

Pre-Treatment Filtration: Feed passes through multi-media and 5-micron cartridge filters to eliminate suspended solids and maintain SDI < 3.

Chemical Conditioning: Anti-scalant and pH adjustment chemicals are injected via metered pumps to inhibit calcium, silica, and sulfate scaling.

High-Pressure Pumping: VFD-driven centrifugal pumps pressurize feed water to overcome the osmotic pressure of concentrated brine.

Membrane Separation: Water flows through primary and secondary RO arrays; primary concentrate is redirected to secondary housings to drive up overall recovery.

Permeate Management: High-purity permeate is routed to storage, while concentrated brine is managed via dedicated reject control valves.

System Configuration

Skid Structure: Sandblasted carbon steel with epoxy coating or optional Grade 304/316L stainless steel framing.

Pressure Vessels: FRP side-port housing vessels rated up to 3.0 MPa operating pressure.

Membrane Elements: High-rejection, fouling-resistant polyamide composite spiral-wound elements (8-inch).

Valving & Piping: Low-pressure lines in Sch 80 UPVC; high-pressure lines in SS316L seamless tubing or SMO 254.

Instrumentation: PLC automation featuring inline pH, ORP, conductivity, flow transmitters, and differential pressure sensors.

Feed Water Quality

Turbidity	< 1.0 NTU
Silt Density Index (SDI)	< 3.0 (15-minute test)
Free Chlorine	< 0.1 mg/L
Total Iron & Manganese	Iron < 0.05 mg/L, Manganese < 0.02 mg/L
Water Temperature	5°C to 35°C

Product Water Quality

Total Dissolved Solids (TDS)	< 50 mg/L (> 98.5% salt rejection)
Conductivity	< 10 uS/cm (at 25°C)
Reactive Silica (SiO₂)	< 0.1 mg/L
Microbiological Level	Sterile permeate free of suspended bacteria and particulates.

Customization Options

Material Upgrades: Frame and high-pressure piping configurable in duplex stainless steel (2205) or super duplex (2507).

Pumping Architecture: Dual-redundant high-pressure pump skids with automatic failover logic.

CIP Integration: On-board automated cleaning tanks, electric heaters, and chemical mixing pumps sized for specific element counts.

Control Platform: PLC architecture adaptable to Siemens S7-1500 or Allen-Bradley ControlLogix with industrial communication protocols.

Quality Control

Hydrostatic Testing: All high-pressure welded piping and vessels hydro-tested at 1.5 times maximum design pressure.

Weld Inspection: 100% visual weld examination with selective radiographic or dye-penetrant testing on high-pressure manifolds.

Factory Acceptance Testing: Complete dry and wet functional testing of electrical panels, loop calibration, and pump dry-run checks.

Material Traceability: Full mill test reports provided for pressure vessels, pumps, membranes, and structural frames.

FAQ

Q: How does the system achieve higher recovery than standard units?

A: By utilizing multi-stage concentrate staging and optimized inter-stage boosting, the system extracts more permeate without exceeding the osmotic pressure limit of tail-end membranes.

Q: What is the typical membrane lifespan?

A: Under stable feed pre-treatment, controlled anti-scalant dosing, and routine CIP cycles every 3 to 6 months, membrane elements maintain performance for 3 to 5 years.

Q: How are scaling risks managed at 90% recovery?

A: Risk mitigation combines automated chemical dosing, flush cycles, real-time scaling index monitoring, and optimized cross-flow fluid dynamics in final-stage elements.

Q: Can the system integrate with existing plant SCADA networks?

A: Yes. The onboard PLC supports industrial communication protocols including Modbus RTU, Modbus TCP, and Profibus DP for seamless DCS integration.

Q: What utility connections are required on-site?

A: Site requirements include a stable feed water supply, a 3-phase industrial power feed, instrument compressed air (0.6 MPa), and a designated drainage line.

Hot Tags: high-recovery brackish water ro system, China high-recovery brackish water ro system manufacturers, suppliers, 6 stage reverse osmosis water filter, osmosis water softener, remineralise water, reverse osmosis and osmosis, reverse osmosis drinking water, reverse osmosis water fluoride

High-Recovery Brackish Water RO System