Abstract: A duct arrangement for an internal combustion engine comprises an exhaust duct, an inlet duct and a cooling air duct. The exhaust duct is contained within the cooling air duct for substantially its whole length and the cooling air duct is contained within the inlet duct for substantially its whole length, so that in use the cooling air duct provides a barrier to limit heat transfer between gas flowing in the exhaust duct and gas flowing in the inlet duct. The invention avoids the need for separate inlet and exhaust ducts with their attendant disadvantages. The separation of the inlet and exhaust ducts by the cooling air duct allows the inlet air to be kept as cool as possible, as is necessary for efficient engine operation.

Abstract: An improved Exhaust Intake Bonnet (EIB) for an Advanced Maritime Emissions Control System (AMECS) includes a ribbed frame lowered and then drawn around a stack of an Ocean Going Vessel (OGV), and a shroud unfurled over the ribbed frame. The ribbed frame has a more flexible structure to better conform to rectangular and oval stacks. The bonnet includes a peak with a duct for receiving exhaust gasses captured by the shroud. The bonnet is positioned over the stack using a deployment arm. A duct carries exhaust from the stack to an Advanced Maritime Emissions Control Unit (AMECU) where the exhaust gasses are processed before releasing to the air. The AMECU) may reside on a ship, a barge, a trailer next to a docked OGV, or be a stationary AMECU) on a dock.

Abstract: Transport ships having a relatively large structure over the water line, such as a pure car carrier, container ship and a passenger ship tend to receive the air resistance during the sailing. When sailing aslant against the wind, check helm had to be effected so far to cancel the swinging moment causing an extra increase in the underwater resistance. A low-fuel-consumption transport ship described has a structure over the water line, including a bow of a shape integral with the bridge of a hollow nearly semispherical to quarter-spherical shape or a partly cylindrical shape which is smoothly continuing to the stern to decrease the air resistance. The low-fuel-consumption transport ship further has a vertical tail incorporating a chimney and is rotatable on the uppermost stern deck to cancel the swinging moment in the air, without almost requiring check helm and, therefore, decreasing the underwater resistance.

Abstract: An Advanced Maritime Emissions Control System (AMECS) includes several Exhaust Intake Bonnets (EIBs) of different size and/or shape, an Emissions Capture System (ECS), and an Advanced Maritime Emissions Control Unit (AMECU) mounted on an Unpowered Seagoing Barge (USB). The EIB includes a cage formed by downward curved ribs, a shroud which is lowerable to cover the ribs, a belt near a lower edge of the EIB for retaining and sealing the EIB to a stack, and a mechanism for tightening the lower edge of the EIB (and thus the belt) around the stack. The ECS lifts one of the several EIBs onto the stack of an Ocean Going Vessel (OGV). Exhaust from the stack is drawn through a large diameter duct to the AMECU. The AMECU processes the exhaust through multiple treatment stages. The stages include pre conditioning the exhaust, oxidizing, reducing, polishing, and precipitating.

Abstract: In an exhaust gas system for ocean-going vessels, preferably for military purposes, that are equipped with at least one internal combustion engine and at least one gas turbine, the exhaust gases from the gas turbine and the exhaust gases from the internal combustion engine are introduced into a collector exhaust gas duct which extends essentially horizontally through the hull of the ship to the stern of the vessel, where it empties into the atmosphere a short distance above the water line. The exhaust gases are mixed in the collector exhaust duct, whereby the hot exhaust gases from the gas turbine are cooled by the comparatively cooler exhaust gases from the internal combustion engine, thereby reducing the risk of infrared detection.

Abstract: A waste-disposing sea-going vessel includes a vessel body that carries solid waste-holding containers to a site at sea far away from land. The vessel body further has an incinerator to incinerate the solid wastes of the containers, a scrubbing chamber to scrub the smoke produced by the incinerator via sea-water, and a neutralization chamber to spray an alkaline solution onto the products produced by the scrubbing chamber, thereby removing hazardous particles before the incinerated wastes are discharged into the sea. A smoke-conveying pipe is further provided to connect a chimney of the incinerator to the scrubbing chamber, and a catalyst converter is provided in the smoke conveying pipe to remove some hazardous smoke particles by filtration and chemical conversion before the post-treatments conducted by the scrubbing chamber and the neutralization chamber.

Abstract: The invention is a new design for a structure such as a stack for exhaust hot gases. One embodiment is that of the top portion of a ship's stack (the watchcap) for exhausting a hot steam plant, a gas turbine, a diesel or other engine, or burner exhaust gases. The function of the invention is to reduce the infrared radiation generated by the hot metal of the exhaust pipe and surrounding structure. This function is accomplished by constructing an annular plenum chamber around a portion of the length of the smokepipe. The plenum chamber has air flow channels, an arrangement of insulation, and openings, top and bottom, so that convective air flow is established at the hot smokepipe wall. The thermal gradient produced also induces a secondary cool-air-flow along an outer wall. Another feature is an arrangement of a double-walled shield extending above, below, and around the terminal end of the smokepipe that blocks the low angle view into the hot smokepipe.

Abstract: A method and an ocean-going vessel are disclosed for more effectively incinerating hazardous liquid wastes at sea. Intermodal shipping tank containers are filled at waste generation sites; transported to dockside and loaded above decks on an incinerator ship; taken out to sea and incinerated in horizontal, liquid burning type incinerators so that the effluents emerge horizontally. Wastes flow by gravity from containers into staging sumps located below decks, and then pumped to incinerator. Pollution abatement tanks, also below decks, collect spilled waste from containers, as well as overflow from staging sumps. Material collected in abatement tanks is pumped into staging sump, and pumped to incinerator. Fuel oil may be introduced into sumps for fueling incinerators to maintain incinerator operation when there is insufficient supply of waste. Effluents are sea-water scrubbed for cooling to eliminate thermal lift and carried promptly into sea.

Abstract: A method of reducing the temperature of hot combustion gases discharging m atop a ship stack and at least partially suppressing infrared radiation thereof by the steps of preheating water to near 100.degree. C. and spraying it into the hot gases at near the base of the stack. Hot water is used because it more readily vaporizes and absorbs the latent heat of vaporization from the gases and exits the stack as a vapor, the radiation from which is more readily absorbed by water vapor, always present above the sea, than is radiation from water droplets.

Abstract: A prefabricated metal throat, for a chimney, is assembled by simple interengagement of two identical elements of a first type with two identical elements of a second type to provide a principal body shaped as a truncated regular pyramid with a rectangular base. The elements of the first type have C-sections in planes parallel to the bases, and each forms a terminal face and two return angles of the throat. The elements of the second type join the return angles together for forming front and rear faces of the throat. The elements are cast in iron, and the second type are trapeziums in which the oblique sides are inclined to the base at an angle according to the size of the chimney, so that the horizontal parts of the C-sections do not exceed a length limit compatible with core-less moulding of the cast iron.

Abstract: A system for improving the effluent dispersal characteristics of smokestacks subject to relative winds comprising a vortex generating airfoil attached to a smokestack near the stack gas exit. Relative winds passing over the airfoil create strong vortices which entrain and hold together smokestack effluents until the vortices deteriorate. The vortex flow direction and angle of ascension may be controlled in order to achieve optimum effluent dispersal by varying the airfoil angle of attack.

Abstract: A fluidic seal is provided for vent stacks which comprises a plurality of spaced frusto-conical concentric baffles with aligned central openings permitting free outward delivery of gas for discharge but providing an obstruction to reverse or return flow within the stack, the baffles at their openings being provided with static electricity preventing rings. Protection is afforded by the baffles against initiation of combustion due to static electricity and in the event of combustion of the discharging gas initiated by lightening preventing backflow in the stack.

Abstract: An environmentally protective bilge water disposal system utilizes an inverted dome gravitational oil separator unit in combination with an engine exhaust flash water vaporizor to remove and recover oil contamination from the bilge water prior to its disposal by flash evaporation in the exhaust stack. The system is capable of operating continuously under regulation by an electrical control arrangement that ensures safety of the engine, and shutting down of the system if certain key components do not function in a proper manner. The system includes a pump, an oil separator, control valves and sensors for various operating parameters and mechanical functions of the system, such parameters and functions including bilge fluid level, water pump function, water flow valve function, engine fuel pressure, engine throttle air pressure, engine exhaust stack temperature, separator function, separator dome position, and oil storage level.

Abstract: An environmentally protective bilge water disposal system utilizes an inverted dome gravitational oil separator unit in combination with an engine exhaust flash water vaporizor to remove and recover oil contamination from the bilge water prior to its disposal by flash evaporation in the exhaust stack. The system is capable of operating continuously under regulation by an electrical control arrangement that ensures safety of the engine, and shutting down of the system if certain key components do not function in a proper manner. The system includes a pump, an oil separator, control valves and sensors for various operating parameters and mechanical functions of the system, such parameters and functions including bilge fluid level, water pump function, water flow valve function, engine fuel pressure, engine throttle air pressure, engine exhaust stack temperature, separator function, separator dome position, and oil storage level.