Ship power system with characteristics of clean emission

Abstract

The invention relates to a clean emission ship power system with characteristics of clean emission. The system is provided with an ammonia liquefaction system, an ammonia conveying system and an ammonia fuel main engine. A smoke exhaust pipe of the ammonia fuel main engine is connected with a smoke mixer, tail gas emitted by the ammonia fuel main engine enters the smoke mixer, the smoke mixer is connected with an SCR reactor, and the ammonia fuel main engine is further connected with an ammonia fuel supply system. The ammonia fuel supply system is provided with a liquid ammonia fuel storage tank, a liquid ammonia low-pressure pump is arranged in the liquid ammonia fuel storage tank, and liquid ammonia is pumped out by the liquid ammonia low-pressure pump, passes through a liquid ammonia daily tank, a liquid ammonia booster pump, a first valve, a liquid ammonia heater and a liquid ammonia supply buffer tank and is conveyed to the ammonia fuel main machine. According to the system adopting the ammonia as the ship power fuel, since the ammonia does not contain sulfur and carbon elements, combustion products of the ammonia are only nitrogen and water and serve as main components of air, exhausted tail gas does not contain sulfur oxide and carbon dioxide, the system has the advantages of being clean and environmentally friendly.

Description

Technical field [0001] The invention relates to the field of ship construction and ship design, in particular to a ship power system with clean fuel and clean emissions. Background technique [0002] Conventional fuel-powered ships have a large amount of carbon dioxide, sulfur oxides, nitrogen oxides, etc. in their exhaust emissions. The emissions of these gases will cause serious greenhouse gas effects, photochemical smog, acid rain and other pollution, endangering the global climate and human health. . The IMO International Maritime Organization has formulated corresponding emission control regulations for the above-mentioned ship exhaust emissions to reduce pollution emissions in ship exhaust. [0003] Regarding carbon dioxide emissions: [0004] The current global warming phenomenon is intensifying, leading to frequent extreme weather phenomena and natural disasters all over the world. The chief culprit is greenhouse gas emissions represented by CO2. In the field of shipping, ...

AI Technical Summary

Problems solved by technology

Liquid ammonia is volatile and toxic. Due to the continuous penetration of external heat into the liquid ammonia fuel storage tank, the liquid ammonia will continue to volatilize. The volatilized ammonia gas will accumulate in the fuel storage tank, which will cause the pressure of the storage tank to rise. If the ammonia volatilization is not handled in time gas, it will lead to safety valve take-off accident, and even damage to the structure of liquid ammonia fuel storage tank

[0012] In summary, ammonia fuel is used as a marine power fuel, and its combustion products do not contain sulfur oxides and carbon dioxide, which is very environmentally friendly. However, the exhaust gas of the ammonia fuel engine developed by MAN still produces nitrogen oxides

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