The electric dust collecting apparatus comprises a plurality of discharge electrodes that are disposed in an exhaust flow passage, a ground electrode that constitutes at least a part of an inner wall surface of the exhaust flow passage, and a voltage applying device that is configured to apply voltage selectively from a common power supply to each of the plurality of discharge electrodes. The plurality of discharge regions, each of which includes at least one discharge electrode, are provided in the exhaust flow passage and an electrode-to-electrode distance between the discharge electrode and the ground electrode is different in each of the plurality of discharge regions. The voltage applying device applies voltage to the discharge electrode for each discharge region, and changes the discharge region where voltage is applied to the discharge electrode in accordance with exhaust gas temperature.

The electric dust collecting apparatus comprises a plurality of discharge electrodes that are disposed in an exhaust flow passage, a ground electrode that constitutes at least a part of an inner wall surface of the exhaust flow passage, and a voltage applying device that is configured to apply voltage selectively from a common power supply to each of the plurality of discharge electrodes. The plurality of discharge regions, each of which includes at least one discharge electrode, are provided in the exhaust flow passage and an electrode-to-electrode distance between the discharge electrode and the ground electrode is different in each of the plurality of discharge regions. The voltage applying device applies voltage to the discharge electrode for each discharge region, and changes the discharge region where voltage is applied to the discharge electrode in accordance with exhaust gas temperature.

A system, device and a method for gas treatment is provided. The gas treatment system comprises a generator, one or more corona devices and separation device disposed in sequence along an exhaust gas flow direction. The generator is driven by a gas flow to generate an alternating supplying voltage. The corona devices are electrically connected to the generator to provide the supplying voltage and generate a first electric field via corona discharge by the supplying voltage such that particulates in the gas passing the first electric field are charged. The separation device is electrically connected to the generator and generate a second electric filed via the supplying voltage to separate charged particulates from the exhaust gas flow.

A system, device and a method for gas treatment is provided. The gas treatment system comprises a generator, one or more corona devices and separation device disposed in sequence along an exhaust gas flow direction. The generator is driven by a gas flow to generate an alternating supplying voltage. The corona devices are electrically connected to the generator to provide the supplying voltage and generate a first electric field via corona discharge by the supplying voltage such that particulates in the gas passing the first electric field are charged. The separation device is electrically connected to the generator and generate a second electric filed via the supplying voltage to separate charged particulates from the exhaust gas flow.

An engine assembly includes a diesel internal combustion engine and an aftertreatment system coupled to the diesel internal combustion engine. The aftertreatment system includes a diesel oxidation catalyst coupled to the diesel internal combustion engine such that the diesel oxidation catalyst receives exhaust gases from the diesel internal combustion engine. The aftertreatment system includes a plasma generator in fluid communication with the diesel oxidation catalyst, wherein the plasma generator is upstream of the diesel oxidation catalyst and downstream of the diesel internal combustion engine, and the plasma generator is configured to generate oxidizers to at least partially oxidize hydrocarbons in the exhaust gases exiting the diesel internal combustion engine.

An engine assembly includes a diesel internal combustion engine and an aftertreatment system coupled to the diesel internal combustion engine. The aftertreatment system includes a diesel oxidation catalyst coupled to the diesel internal combustion engine such that the diesel oxidation catalyst receives exhaust gases from the diesel internal combustion engine. The aftertreatment system includes a plasma generator in fluid communication with the diesel oxidation catalyst, wherein the plasma generator is upstream of the diesel oxidation catalyst and downstream of the diesel internal combustion engine, and the plasma generator is configured to generate oxidizers to at least partially oxidize hydrocarbons in the exhaust gases exiting the diesel internal combustion engine.

An exhaust gas cleaning system for cleaning exhaust gas onboard a ship includes an exhaust gas inlet for receiving exhaust gas, and a scrubber having a scrubbing section to clean exhaust gas from pollutants. The scrubbing section includes an exhaust gas inlet for receiving exhaust gas and an exhaust gas outlet for outputting exhaust gas. A wet Electrostatic Precipitator further cleans the exhaust gas after cleaning in the scrubbing section. The Precipitator includes an exhaust gas inlet communicating with the outlet of the scrubbing section for receiving the exhaust gas, an exhaust gas outlet for outputting the exhaust gas, and at least one channel to convey the exhaust gas from the inlet to the outlet of the Precipitator. Ejection devices are arranged between the scrubbing section and the channel, and each includes an ejection orifice facing the Electrostatic Precipitator and arranged to eject liquid towards the channel to clean it.

An exhaust gas cleaning system for cleaning exhaust gas onboard a ship includes an exhaust gas inlet for receiving exhaust gas, and a scrubber having a scrubbing section to clean exhaust gas from pollutants. The scrubbing section includes an exhaust gas inlet for receiving exhaust gas and an exhaust gas outlet for outputting exhaust gas. A wet Electrostatic Precipitator further cleans the exhaust gas after cleaning in the scrubbing section. The Precipitator includes an exhaust gas inlet communicating with the outlet of the scrubbing section for receiving the exhaust gas, an exhaust gas outlet for outputting the exhaust gas, and at least one channel to convey the exhaust gas from the inlet to the outlet of the Precipitator. Ejection devices are arranged between the scrubbing section and the channel, and each includes an ejection orifice facing the Electrostatic Precipitator and arranged to eject liquid towards the channel to clean it.

A modular plasma treatment system has interchangeable and easily accessible inner and outer electrodes that concentrically nest within an outer housing of one or more plasma reformers. The inner and outer electrodes have self-centering features that allow for blind-fitting of the interchangeable inner and outer electrodes during electrode replacement and maintenance. A plurality of reformers that generate different types of plasmas are preferably arranged serially to allow for a mixture of separate plasmas within the same reaction area and to increase utilization of short-lived radicals.

This disclosure relates generally to an emitter for dissociating exhaust gases on a molecular level into their respective elemental constituents. The emitter includes a palladium plated anode and a cathode, at least a portion of which is palladium plated. When properly powered, the emitters create a non-linear quantum dissonance field to dissociate molecules in exhaust.