Natural gas high and low pressure integrated gas supply system for large dual-fuel power ship

Abstract

The invention discloses a natural gas high and low pressure integrated gas supply system for a large dual-fuel power ship. The natural gas high and low pressure integrated gas supply system comprisesa liquid natural gas (LNG) fuel bin, a high-pressure gas supply system and a low-pressure gas supply system. The LNG fuel bin is an IMO B-type thin film bin. The high-pressure gas supply system boostsLNG through an LNG booster pump, the LNG is gasified and heated through an LNG high-pressure gasifier, and the fuel gas with the pressure, temperature and flow meeting the requirements of a ship mainengine is provided. The low-pressure gas supply system comprises an LNG gasification unit and a BOG processing unit. The LNG gasification unit gasifies and heats the LNG through an LNG low-pressure gasifier, and the fuel gas with the pressure, temperature and flow meeting the requirements of a generator and / or a boiler is provided. The BOG processing unit is pressurized by a normal-temperature BOG compressor, then the temperature is adjusted through a BOG heater and an outlet heat exchanger of the BOG compressor, and the fuel gas with the pressure, temperature and flow meeting the requirements of a dual-fuel generator and / or the boiler is provided. The gas supply system is simpler and more reliable.

Description

technical field [0001] The present invention relates to a kind of marine fuel gas supply system adopting International Maritime Organization (IMO) B-type tank as a liquefied natural gas (LNG) storage tank, in particular to a high and low pressure integrated gas supply system for a large dual-fuel power ship, the gas supply system The system complies with the latest IGF rules for LNG powered ships and relevant classification society rules and standards. Background technique [0002] Ships emit a large amount of NO into the atmosphere when they burn heavy oil X , SO X , CO 2 As well as PM2.5 particulate matter, in some large ports, rivers and sea areas, it will cause relatively large environmental pollution, and even become one of the main sources of pollution. This is inconsistent with the current increasing emphasis on environmental protection requirements. In addition, as the MARPOL International Convention for the Prevention of Pollution from Ships is becoming more and...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of the prior art and provide a natural gas high and low pressure integrated gas supply system for large-scale dual-fuel powered ships, which solves the different needs of dual-fuel powered ships for gas when using various types of gas equipment, and Change the complex process flow of the existing gas supply system to make the gas supply system simpler and more reliable

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