Ship power system with characteristics of clean emission

A technology for power systems and ships, applied in ship propulsion, ship construction, exhaust devices, etc., can solve problems such as liquid ammonia volatilization, storage tank pressure rise, safety valve take-off accidents, etc., to achieve uniform diffusion, reduced volume, The effect of ensuring safety

Active Publication Date: 2020-07-10
DALIAN SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 t

Method used

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  • Ship power system with characteristics of clean emission

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Effect test

Embodiment 1

[0044] When the ship is in operation, the ammonia volatilized gas in the liquid ammonia fuel storage tank is less than or basically equal to the demand for ammonia gas during tail gas treatment, open the first valve and the fourth valve, close the second valve, the third valve and the liquid ammonia vaporization Inside the device. When the amount of volatile gas in the liquid ammonia fuel storage tank is too much, and the ammonia fuel engine tail gas treatment requires a small amount of ammonia, this situation may occur when the volume of the liquid ammonia fuel storage tank is too large, the liquid ammonia fuel storage tank has poor cooling effect, and the ship The operating environment is bad or the host is in the Tire II operating mode without exhaust gas denitrification treatment.

[0045] Through the ammonia fuel supply system, the low-temperature liquid ammonia sequentially passes through the liquid ammonia daily tank and the liquid ammonia booster pump. After the delivery ...

Embodiment 2

[0050] When there is too much volatile gas in the liquid ammonia fuel storage tank, which exceeds the amount required for exhaust gas treatment, open the second valve, the third valve, and the fifth valve, close the first and fourth valves, and open the fifth valve to start ammonia liquefaction system. This situation may occur when the volume of the liquid ammonia fuel storage tank is too large, the cooling effect of the liquid ammonia fuel storage tank is poor, the operating environment of the ship is bad, or the main engine is in the Tire II operating mode without exhaust gas denitrification treatment. The volatilized ammonia gas in the liquid ammonia fuel storage tank passes through the ammonia compressor and enters the ammonia pre-cooler through the fifth valve. The heat exchange is performed at the ammonia pre-cooler, and the ammonia gas is pre-cooled, and the cooled ammonia enters The ammonia liquefaction device, after liquefaction, forms liquid ammonia, which returns to ...

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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, ...

Claims

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Application Information

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IPC IPC(8): B63H21/32B63H21/38B01D53/94F01N3/20
CPCB63H21/00B63H21/38B01D53/9418B01D53/9431F01N3/2066F01N3/208F01N3/2006B01D2251/2062Y02T10/12
Inventor 片成荣张义明邹旭李照辉彭贵胜嵇智勇李达孙强吴楠吕岩杜欣张林涛郭强贾淑洁张艳丽方芳薛宇迪
Owner DALIAN SHIPBUILDING IND
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