Bag Filter Element for Brine Filtration in Salt Lake Lithium Extraction

Product Details

Bag filter element (for raw brine coarse filtration in salt lake lithium extraction) is used with stainless steel bag filter for the front-end coarse filtration of raw brine (salt production/chemical brine). It effectively intercepts sediment, salt crystal particles, suspended solids, algae and mechanical impurities, protects subsequent membrane/resin/evaporation equipment, and reduces the risk of clogging and corrosion.

Structure & Material (Salt Corrosion Resistance)

• Filter Material: Polypropylene (PP)/Polyester (PE) non-woven fabric, deep gradient structure, resistant to brine, acid and alkali, temperature resistance ≤80℃.
• Accuracy (Common for Coarse Filtration): 50μm / 100μm / 200μm (100–200μm recommended for brine coarse filtration).
• Support/End Cap: Glass fiber reinforced PP, corrosion resistant and high strength.
• Seal: Double O-ring (prevents brine leakage), compatible with standard bag filter (#2 bag universal).
• Filtration Area: Approx. 0.5–1.0㎡/piece, large dirt holding capacity and long service life.

Working Principle

Pressure type outside-in filtration: Raw brine enters the filter cylinder under pump pressure and flows from the outside to the inside of the filter bag; large particles are intercepted on the surface, small particles are adsorbed deeply, and clean brine flows out from the central outlet. Replace the filter element when the pressure difference reaches 0.08–0.12MPa, easy to operate.

Core Advantages

1. Salt Corrosion Resistance: PP/PE material withstands high-salinity brine (NaCl≤350g/L), no dissolution and no brine pollution.
2. Large Flow & High Dirt Holding Capacity: Single piece flow rate 10–30m³/h, dirt holding capacity is 5–10 times that of melt-blown filter elements, reducing replacement frequency.
3. High Coarse Filtration Efficiency: Intercepts ≥95% of large particles at one time, protecting downstream precision equipment.
4. Low Cost & Easy Maintenance: 30-second quick replacement without tools; washable and reusable (depending on pollution degree).
5. Strong Compatibility: Compatible with 304/316L stainless steel bag filters (single/multi-bag), directly replacing traditional filter bags.

Technical Parameters (Standard Type)

Application Scenarios

• Salt Production Industry: Coarse filtration of raw brine (seawater/underground brine) to remove salt crystals, sediment and algae.
• Chemical Brine: Pretreatment of brine in chlor-alkali/soda ash industry to intercept mechanical impurities and suspended solids.
• Salt Lake Lithium Extraction: Front-end filtration of salt lake brine to protect subsequent membrane separation/adsorption processes.

Installation & Maintenance

1. Installation: Take out the old filter bag → put in the bag filter element → compress the sealing cover → start the machine and exhaust air.
2. Maintenance: Replace when pressure difference reaches 0.1MPa; washable and reusable 2–3 times if lightly polluted.
3. Notes: Avoid scratching the filter material with sharp objects; drain brine when shutdown to prevent crystal clogging.