SOx Scrubber · Exhaust Gas Cleaning
The Wärtsilä NOR is a NOx Reducer selective catalytic reduction system for marine diesel-engine exhaust. Its purpose is to reduce nitrogen-oxide emissions by dosing a urea-based reagent into the exhaust stream and passing the conditioned gas through catalyst elements. The system is installed in the exhaust line of the connected engine and includes the reactor, dosing equipment, control functions and associated sensors required by the approved installation. Performance depends on suitable exhaust temperature, correct reagent dosing, healthy catalyst elements and accurate engine/exhaust data. The exact catalyst volume, dosing rate, temperature window and certification limits are engine- and installation-specific; refer to the manufacturer documentation for the exact figure.
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What our service work and the manufacturer documentation say about keeping this model running.
Inspect dosing pumps, injectors, mixers, reagent lines and filters for leakage, crystallization and blockage. Review catalyst differential pressure, exhaust temperatures, dosing trends and emission measurements, and inspect catalyst elements according to the approved maintenance plan. Verify reagent quality and flush or preserve dosing equipment as specified during long shutdowns. Calibration, catalyst acceptance and emission test criteria must follow the certified engine/NOR documentation.
Carry dosing-pump and injector service parts, filters, seals, representative temperature/pressure/NOx sensors, control fuses, dosing-air components where fitted and approved cleaning consumables. Catalyst blocks are strategic spares whose carriage should follow the maker's recommendation and vessel operating profile.
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