Brine Electrochlorination

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  5. Brine Electrochlorination

ULBrine™ systems are designed specifically for operation on artificial brine sources and can be used for any application requiring hypochlorite as the disinfectant, where seawater is not accessible or they are to be used for drinking water chlorination. These systems are installed inland and are designed to provide substantial quantities of sodium hypochlorite (in the storage tank) to assure that disinfection capacity is always available to the end-user.

ULBrine™ systems can produce sodium hypochlorite up to 8000 ppm concentration. These systems are modular in construction and can be designed according to the customer’s requirements and limitations.

ULSeawater™ utilizes seawater feed with high flow rates to help control cathode fouling from the naturally occurring magnesium and calcium in seawater. As a result, the product concentration of sodium hypochlorite is low (max. 2500 ppm) and operating current efficiency is high, as the power consumption for ULSeawater™ electrolyzers is <4.4 kWh/kgCl2. Due to the seawater providing a “free” source of salt, these systems contain smaller equipment of less variety than brine electrolysis systems.

Brine Electrochlorination

ULBrine is generally configured with the following components and operates in the manner described below:

  • Water softener: Essential for removal of calcium and magnesium from the feed water
  • Salt saturator: Provides the required salt solution for electrolysis
  • Electrolyzer cell or cells: Electrolyzes the dilute brine solution to produce sodium hypochlorite
  • DC power rectifier: Provides the direct current for electrolysis
  • Storage/degassing tank: Product storage to meet dosing requirements as well as any excess capacity essential to assure continuous dosing capabilities
  • Hydrogen dilution blower: Provided to dilute the by-product hydrogen produced during the electrolysis process
  • Dosing pump with dosing control: Provide the needed disinfection dose based upon the chlorine residual or flow rate at the point of disinfection
  • Cell cleaning system: Used to remove the calcareous material deposited on the cell cathodes during the production process
  • Central control panel: Performs the system production control function