Design and Application of a Pilot-Scale System for Selective Catalytic Reduction(SCR)of NOx from Marine Diesel Engines
At present,marine sources have become one of the major sources of air pollution in China,besides coal-fired power plants,industries and on-road vehicles.Thus,the air pollution control from ships has attracted great attention.In this work,a pilot-scale system based on selective catalytic reduction(SCR)of NOx was designed for the purification of marine diesel effluent.The system is composed of four main parts:the marine diesel engine,the SCR reactor,reductant supply system and exhaust gas measurement module,which could be used for both teaching and exploratory experiments such as the measurement of pollutant emission characteristics,reductant pyrolysis and mixing,nitrogen oxide removal and characteristics of particulate matter deposition under different working conditions of the engine.The relevant experiments will help the undergraduate and postgraduate students of ship and ocean engineering to strengthen their understanding of the knowledge from the courses of marine main propulsion power system,combustion theory,fluid mechanics and environmental catalysis under the background of ship air pollution control,and to master the system design and optimization methods in the field of marine exhaust emission control.As a result,their practical ability and innovative consciousness would be greatly improved to solve the complex engineering problems in their future career.
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