Diameter 200mm Porous Titanium Filter For Chlor-alkali Industry

Positioned upstream of the ion-exchange membrane cells.

This filter provides absolute precision filtration in the secondary brine purification loop, specifically designed to capture suspended solids and fine particulate impurities-including calcium/magnesium hydroxide precipitates and iron oxides-to achieve the ultra-pure saturated brine quality mandatory for protecting sensitive ion-exchange membranes.This ultra-fine filtration is non-negotiable for protecting the sensitive and expensive ion-exchange membranes from scaling and physical damage.

The filter's absolute pore rating (typically 5-20 microns) and rigid sintered structure ensure consistent effluent quality. It withstands the hot, concentrated chloride environment without corroding, unlike stainless steel alternatives which risk chloride stress corrosion cracking (CLSCC). Its cleanability via back-pulsing allows for long service cycles and minimal brine loss.

Installed after the chlorine gas coolers and electrolysis cell outlets.

This application employs coalescing filtration to scrub entrained brine mist and sulfuric acid aerosol from the hot, saturated wet chlorine gas stream, a critical step for protecting downstream compression and drying equipment.Efficient demisting is vital to prevent corrosion in downstream compressors, drying towers (using concentrated sulfuric acid), and piping.

Titanium's ability to form a stable, protective passive oxide layer in oxidizing environments makes it one of the few metals suitable for continuous contact with wet chlorine gas. The filter's high porosity and hydrophilic surface effectively coalesce and remove fine mist, ensuring dry gas proceeds to the drying stage.

Within the recirculation loops of membrane cell anolyte (NaCl-depleted, chlorine-saturated) and catholyte (NaOH solution) streams.

The filter actively removes particulate contaminants originating from electrode coating degradation products and process scale within the anolyte and catholyte recirculation loops, maintaining fluid purity and protecting critical recirculation equipment.Filtration maintains fluid cleanliness, protects recirculation pumps, and ensures efficient electrolysis.

The filter offers unmatched compatibility: it resists the anolyte's acidic, chlorine-saturated conditions and the hot, concentrated caustic soda of the catholyte. Its thermal stability handles the elevated operating temperatures of these loops without performance degradation.

In the hydrogen gas processing line after the cell and coolers.

It filters the hydrogen gas stream to remove fine caustic carryover and other particulates before the gas is used or further processed. This protects downstream catalysts in purification systems or ensures gas quality for users.

While less corrosive than chlorine, the hot hydrogen gas with caustic traces still demands a robust material. The filter's inertness and mechanical strength provide reliable, maintenance-free service in this duty, ensuring high-purity hydrogen output.

Final polishing of dilute caustic soda before storage or sale, and in general plant process water systems.

Removes residual impurities to achieve final product clarity and specification, or protects sensitive instrumentation.

The filter's smooth, non-shedding porous surface prevents product contamination. Its ease of cleaning allows it to handle different batches without cross-contamination, supporting versatile use within the plant.