Finland-based Valmet has introduced a new wet electrostatic precipitator for the marine industry to enhance emission control by removing harmful particulate matter from the exhaust gas flow.
The introduction of Valmet Wet Electrostatic Precipitator (WESP) is a continuation of the company’s development of a hybrid scrubber and wash water treatment system. The WESP is used to control particulate matter emissions, such as black carbon. The system also captures heavy metals, acid mist, oil mist and visible plume.
Its operation is based on a very strong electrical field between discharge electrodes and collecting tubes. The electrical field charges the particles in the exhaust gas flow, resulting in their migration away from the flow to the collecting tubes. The process is controlled fully automatically by Valmet DNA or other distributed control systems and can use new Valmet Industrial Internet (VII) features.
Valmet has recently tested a wet electrostatic precipitator and scrubber combination and cut exhaust gas particulate matter and black carbon emissions in a marine diesel engine by up to 99%. While SOx scrubbers can reduce particulate matter and black carbon emissions with limited efficiency, a combination of a wet scrubber and a wet electrostatic precipitator, or a standalone wet electrostatic precipitator can capture these emissions almost completely from a ship’s exhaust gas, says Valmet.
Valmet has added a wet electrostatic precipitator (WESP) solution to its range of exhaust gas cleaning products.
The solution makes it possible to comply with tightening regulation and even reach the EURO 6 norm, which is the tightest regulation for road transportation in the European Union. The pilot testing and configuration project was carried out together with VTT Technical Research Centre of Finland Ltd (VTT).
The WESP system is based on technology by Valmet’s partner AWS Corporation.
