A single lng fuel powered cargo ship

Abstract

The invention relates to a single LNG (liquefied natural gas) fuel powered freighter, of which a main propulsion unit is of a double-engine and double-propeller type. Main engines are two single liquefied natural gas fuel engines, two fixed pitch propellers are driven by a shaft system, and the shaft system consists of a reduction gear box, a propeller shaft, a bearing and a short shaft. From the view of the stern to the bow, rotating directions of the left main engine and the right main engine are counterclockwise, the rotating direction of the left propeller is counterclockwise, and the rotating direction of the right propeller is clockwise. A power generation system consists of a single liquefied natural gas fuel generator set and a main shaft generator. The single LNG fuel powered freighter solves the heating source problem of an LNG gas supply vaporizer, and provides an intrinsically safe cabin with high safety; the single LNG fuel powered freighter achieves simultaneous or separate supply of waste heat, and enhances the regulating ability of the LNG gas supply vaporizer when seasonal environmental temperature changes; the single LNG fuel powered freighter can realize the dual functions that zero discharge in zero discharge control water areas and discharge after waste water is treated till reaching standards in non-zero discharge control water areas; the single LNG fuel powered freighter improves handling safety; the single LNG fuel powered freighter represents the development trend of new energy and green powered freighters of river transportation.

Description

technical field [0001] The invention belongs to the technical field of ships, in particular to a cargo ship powered by a single LNG (liquefied natural gas) fuel. Background technique [0002] At present, in order to improve the efficiency of inland waterway shipping and the goal of developing green and clean power transport ships, an intrinsically safe engine room with high safety is required; in order to realize the use of the waste heat in the fresh water internal circulation of the main engine, solve the heating heat source problem of the LNG gas supply vaporizer, and realize simultaneous Or provide waste heat alone to enhance the adjustment ability of LNG vaporizer when the ambient temperature changes in seasons; realize the dual functions of zero discharge in controlled waters of zero discharge and discharge after non-zero discharge controlled waters are treated up to standard; improve operation safety; represent green power of new energy in river-river combined transpor...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a single LNG fuel-powered cargo ship, which solves the problem of the heating heat source of the LNG gas supply vaporizer existing in the prior art, and provides an intrinsically safe engine room with high safety; realizes simultaneous or separate supply of waste heat, and enhances the current season The ability to adjust the LNG vaporizer when the ambient temperature changes; realize the dual functions of zero discharge in the controlled waters of zero discharge and discharge after the treatment in the non-zero controlled waters reaches the standard; improve the handling safety; represent the development direction of new energy and green power cargo ships for river-river combined transport

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