Large Flow Pleated Filter Cartridge for Lithium Extraction from Salt Lake Brine

Product Details

Large flow pleated filter cartridge for lithium extraction from salt lake brine features high flow rate, high salt resistance, long service life and easy replacement. Specially designed for high‑salinity brine applications, it is used for pre‑membrane security filtration to protect downstream lithium extraction membrane elements.

Product Overview

Application: Pretreatment of salt lake brine (high salinity, high chlorine, containing sediment / colloids / trace heavy metals). Removes suspended solids, colloids and organic matter to prevent fouling of reverse osmosis / nanofiltration membranes and improve lithium recovery rate.

Applicable Conditions: High salinity (TDS 30,000–300,000 mg/L), pH 4–10, temperature ≤80℃, containing trace corrosive ions (Cl⁻, SO₄²⁻, Mg²⁺).

Core Advantages: High flow rate per cartridge (replaces multiple standard cartridges), high dirt‑holding capacity, salt & corrosion resistance, low pressure drop, long service life, easy replacement.

Structure & Materials

Filter Membrane: Polypropylene (PP) pleated membrane (salt resistant, acid & alkali resistant, fouling resistant); fiberglass composite available for enhanced rigidity.

Support / Drainage Layer: PP non‑woven fabric + high‑strength PP inner / outer mesh, anti‑deformation, ensures smooth flow channels.

End Caps: Fiberglass reinforced PP (high strength, anti‑aging).

Connections: 222 / 226 / bayonet (compatible with 3M / PALL universal connections).

Core Rod: PP (metal‑free, prevents brine corrosion).

Seals: EPDM / FKM, salt resistant, temperature resistant, anti‑aging; U‑shaped sealing groove prevents bypass.

Technology: M‑type high‑low corrugated pleating, thermal fusion welding (no adhesive, no secondary pollution), maximizes filtration area.

Key Technical Parameters

Dimensions (Large Flow 6.5 Inch OD)

Outer Diameter: 152 mm (6.5")

Length: 40" (1016 mm) / 60" (1524 mm) (mainstream)

Inner Diameter: 3" (76 mm), high flow channel

Filtration Rating (Common for Brine Lithium Extraction)

1 μm, 5 μm, 10 μm, 20 μm (1–10 μm preferred for pre‑membrane security filtration)

Flow Rate & Pressure Drop (25℃, clean water basis)

Single cartridge flow: 40" → 20–25 m³/h; 60" → 30–35 m³/h

Initial pressure drop: ≤0.02 MPa (20℃)

Recommended replacement pressure drop: 0.15–0.25 MPa

Maximum operating pressure: 0.35 MPa (3.4 bar)

Temperature & Chemical Compatibility

Max operating temperature: 80℃ (PP)

pH resistance: 4–10

Salt resistance: Full concentration NaCl, MgCl₂, LiCl brine

Not for use with: Strong oxidants (concentrated chlorine, concentrated sulfuric acid), aromatic solvents

Filtration Area & Dirt‑Holding Capacity

40": 8–10 m²; 60": 12–15 m²

Dirt‑holding capacity: ≈2–3 kg / cartridge (depends on rating and water quality)

Performance Features

High Flow & Low Pressure Drop: 6.5" large diameter + pleated structure; single cartridge flow is 5–8 times that of standard 2.5" cartridges, reducing cartridge quantity and footprint.

High Salt Resistance & Fouling Resistance: PP material withstands high‑salinity brine; depth filtration (graded pore size) resists colloid / organic fouling and extends service life.

Long Life & Low Cost: High dirt‑holding capacity, service life 30–90 days (depends on water quality), less frequent replacement, lower labor and consumable costs.

All‑Plastic Anti‑Corrosion: All‑PP construction (end caps, core rod, support mesh), no metal parts, avoids brine corrosion and heavy metal leaching, ensures lithium product purity.

Reliable Sealing & Anti‑Bypass: U‑shaped sealing groove + EPDM / FKM gaskets, adapts to high‑salinity wet conditions, eliminates short‑circuit filtration, ensures effluent quality.

Easy Replacement: Universal bayonet / 222 connections, compatible with standard large‑flow security filters (2205 duplex stainless steel / titanium); single person replacement in 3–5 minutes.

Applications

Pre‑Membrane Security Filtration: Before reverse osmosis (RO), nanofiltration (NF), electrodialysis (ED) to protect core membrane elements.

Brine Pretreatment: Salt field brine → sedimentation → precision filtration → this cartridge → membrane system; removes fine sand, colloids, humic acid.

Lithium Salt Concentration / Refining: Filtration of concentrate for impurity removal and finished lithium chloride / lithium carbonate solution to improve product purity.