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A kind of bog recovery system and working method of lng power ship

A recovery system and ship technology, applied in the field of reliquefaction, can solve problems such as instability and complexity, and achieve the effects of reducing energy waste, reducing system load, and improving load regulation capabilities.

Active Publication Date: 2022-03-11
JIANGSU UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

[0006] The invention can overcome the complex and unstable problems of the previous BOG reliquefaction system, reduce the heat exchange loss when reliquefying BOG, and meanwhile the system has good load regulation ability

Method used

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  • A kind of bog recovery system and working method of lng power ship

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Embodiment Construction

[0026] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Such as figure 1Shown: It is a BOG recovery system of an LNG-powered ship according to the present invention, which includes an LNG storage tank 1, a heat exchanger 2 and an LNG filling device 7, wherein the heat exchanger 2 is isolated from top to bottom in sequence There are filter screen 2a, spray pipe 2b, filler 2c and intake pipe 2d, spray pipe 2b is helpful for sufficient heat exchange between subcooled LNG and BOG, and improves heat exchange efficiency;

[0028] The LNG filling device 7 is sequentially connected to the second valve 11, the first regulating valve 12, and the inlet c of the spray pipe 2b of the LNG storage tank 1 through pipelines, and the other path is sequentially connected to the third valve 13 and the secon...

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Abstract

The invention discloses a BOG recovery system for an LNG-powered ship, which includes an LNG storage tank, a heat exchanger and an LNG filling device, wherein the heat exchanger is provided with a filter screen, a spray pipe, a filler and an air intake pipe, and the LNG filling device is sequentially arranged. It is connected with the second valve, the first regulating valve and the LNG storage tank; the other is connected with the third valve, the second regulating valve and the LNG storage tank; the third is connected with the seventh valve, the LNG pump and the heat exchanger; the LNG storage The tank is connected to the LNG liquid level control liquid storage tank, the LNG liquid level control liquid storage tank is connected to the BOG buffer tank through the fourth valve and the LNG storage tank through the fifth valve, the BOG buffer tank is connected to the BOG compressor, and the BOG compressor passes through the sixth valve A heat exchanger is connected, and the heat exchanger connects the eighth valve and the third regulating valve to the LNG storage tank. The invention fully recovers the BOG produced during the precooling and filling process of the ship's LNG storage tank and when it is out of service, thereby reducing operating costs and environmental pollution.

Description

technical field [0001] The invention relates to the reliquefaction of gas generated during the precooling and filling process of an LNG storage tank of an LNG-powered ship and when it is out of service, and specifically relates to a BOG recovery system of an LNG-powered ship and a working method thereof. Background technique [0002] Natural gas is a kind of clean energy with high combustion calorific value, no pollution and high energy utilization rate, and its market share is increasing day by day. During storage and transportation, natural gas is cooled to -162.5°C under normal pressure and becomes liquid natural gas (LNG), the volume becomes 1 / 625 of the original. [0003] With the aggravation of air pollution around the world, the standards for ship exhaust emissions at home and abroad have been further improved. In order to meet the emission standards and avoid adding expensive and bulky desulfurization and denitrification devices, LNG-powered ships can quickly develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C5/02F17C5/04F17C13/04
CPCF17C5/02F17C13/04F17C5/04F17C2223/0161F17C2250/03F17C2270/0105F17C2223/033F25J1/0025F25J2205/30F25J2215/02F25J2220/62F25J2230/30F25J2210/06F25J2205/90F25J1/0045F25J1/0277
Inventor 沈九兵严思远许津津蒋庆峰冯国增
Owner JIANGSU UNIV OF SCI & TECH
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