L’Orange adds NOx after-treatment to its range

The Rolls-Royce Power Systems subsidiary has launched its system, known as L’ONOX, in response to the forthcoming IMO Tier III and EPA Tier IV emission regulations.

L’ONOX injects a urea-water solution at a pressure of about 10bar into the exhaust system through several dosing units. To ensure accurate dosage amounts, the L’ONOX system’s electronic components continuously monitor the signals from the integrated pressure and temperature sensors. True to the proven common-rail principle, several injection units are supplied by a single delivery unit. The injection process ensures optimal mixing of the urea-water solution in the exhaust system, supporting efficient reduction of nitrogen oxides into nitrogen and water in the SCR catalytic converter.

L’ONOX is claimed to bridge the gap between the injection of diesel or heavy fuel oil and the subsequent treatment of the resulting emissions. The company says it has applied its experience in injection technology to exhaust after-treatment, offering a modular system which is robust, flexible, and simpler than other systems as it does not rely on compressed air.

“Exhaust after-treatment is often the only way to significantly reduce emissions, since manufacturers have usually already reached the limit of the possibilities inside the engine,” says Dr. Schmidt, CEO of L’Orange. “Our product can be adapted to the specific engine requirements of our global customers. So we can now offer an injection concept in exhaust after-treatment that is not restricted to certain engines.”

The system is claimed to better suit large engines than the truck-derived urea-water systems from other manufacturers.