Complete transformer-rectifier solution for chlor alkali plants
FRIEM supplied and commissioned a high-current AC/DC power conversion system for a chlor-alkali plant in Canada, rated at 320 V DC / 120 kA.
The plant uses continuous electrolysis processes to produce sodium chlorate and other chemical compounds, where stable and controlled direct current is essential for consistent operation.
The role of power conversion in chlor-alkali electrolysis
Chlor-alkali processes rely on high-current direct current as the primary input for electrolysis.
In these applications, the power conversion system is not a supporting component, but a critical interface between the electrical supply and the electrochemical process.
Operating conditions are highly demanding, with aggressive and corrosive environments, continuous operation requirements, and high current levels requiring strict stability control.
In this context, power systems must ensure long-term reliability and accurate current regulation.
AC/DC rectifier system design and configuration
FRIEM supplied and commissioned a transformer-rectifier system rated at 320 V DC / 12 kA, designed for continuous industrial operation.
The system is based on thyristor technology in a double-bridge configuration, ensuring stable and controlled DC supply to the electrolysis cells.
The system is configured as a two-level containerized solution with an external transformer, integrating power conversion, control, and monitoring into a single unit.
This configuration ensures stable DC output under variable load conditions, while enabling integrated monitoring and control of electrical parameters and simplifying installation and commissioning on site.
Ensuring stable operation in continuous electrolysis processes
The system supports continuous electrolysis by ensuring stable and controlled power delivery under demanding operating conditions.
The containerized configuration reduces installation complexity and enables faster integration on site.
Integrated monitoring and accurate DC measurement provide full visibility of process parameters, supporting consistent operation over time.
In chlor-alkali processes, performance depends on how power is delivered and controlled.
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