EURODIA EUR40C-360 BIP, 18 × Bipolar Membrane Electrodialysis Stacks

Equipment Model : 18 × Bipolar Membrane Electrodialysis Stacks, model EUR40C-360 BIP Cells per stack: 360 active "EUR40" cells per stack (6,480 cells across the full system) Effective membrane area: 0.4 m² per cell, using Neosepta® bipolar, anion-exchange, and cation-exchange membranes with EUR40 spacers Electrode assembly: 3 sets of electrode plates per stack (titanium/stainless-steel flat electrodes), 3 intermediate plates, 1 painted-carbon-steel clamping plate with yokes and hydraulic cylinders, 4 SS304 tie-rods per stack Ancillary equipment supplied: 18 stack support trolleys, 11 automatic hydraulic pumps with control cabinets, 30 seaworthy shipping crates Target output concentration: ≈4% HCl and ≈4% NaOH from the EDBM stacks (per the supply contract's guarantee schedule); the stack design can be pushed to 6%+, but the plant's control strategy uses that headroom sparingly because higher concentration accelerates membrane wear Electrical rating (per stack): Warranted operating range of 270–350 V / 770–900 A; top rated capacity of 1,080 A / 350 V Membrane life strategy: Standard membrane life is roughly 2 years; management plans to run the first two production "loops" at up to 1,080 A, which — combined with planned upgrades to the chelating (hardness-polishing) beds feeding the EDBM — is intended to extend membrane service life toward 3 years. Black & Veatch reviewed this approach and considers it sound. Downstream concentration: Dilute acid and base exiting the EDBM are concentrated further by dedicated thermal systems: a 3-effect falling-film evaporator plus a pressure-swing azeotrope-breaking column brings HCl to a commercial 35.25%; a 4-effect forced-circulation evaporator brings NaOH to 50% (membrane grade) Chloride impurity control: An added ion-exchange polishing step (KOCH resins, as used in the pulp & paper industry) reduces residual chloride in the NaOH product, which ranged 8–1,200 mg/L in Eurodia's own bench testing