NOx selective catalytic reduction system (SCR) for ships
NOx EXHAUST
Couple
The NOx exhaust gas cleaning system for marine diesel engines. Couple Systems, supplies complete exhaust gas cleaning systems which can be attached to sources of NOx emissions, such as internal combustion engines
which are fueled by diesel or heavy fuel oil. For marine diesel engines the NOx exhaust gas cleaning system is installed downstream of the engine, in the
exhaust system, and consists of the NOx catalytic reactor, a control unit, suitable for either open or closed loop control systems and a dosing unit for the reduction agent.
The control unit ensures optimum and safe operation and egulates the injection of reducing agent according to the required load of the engine.
This intelligent control equipment guarantees optimized consumption of the reducing agent.
The NOx exhaust gas cleaning system is based on a process known as Selective Catalytic Reduction (SCR), this currently being the most effective and proven process for NOx reduction. Harmful nitrogen oxides are reduced into harmless nitrogen and water, through the use of a urea solution and the NOx catalyst.
The main features of the honeycomb type catalyst being, the specially designed surface which ensures a high degree of activitywith associated resistance against chemical substances.
In combination these characteristic allow for a highly compact unit, which ensures low exhaust back-pressures and low ammonia slip.
