System and method for re-condensing boil off gas (BOG) of liquefied natural gas

A technology of liquefied natural gas and evaporated gas, which is applied in liquefaction, refrigeration, liquefaction, solidification, etc., can solve the problems of complex logic control, large equipment investment, and low condensation efficiency, and achieve high economic benefits, high condensation efficiency, and simple equipment Effect

Active Publication Date: 2014-09-10
SINOPEC ENG +1
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The internal components of the recondenser (such as Pall rings, separator devices, deflectors, internal pipes, etc.) are complex, and the logic control is relatively complicated
And because the condensation method in the recondenser is static contac

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System and method for re-condensing boil off gas (BOG) of liquefied natural gas
  • System and method for re-condensing boil off gas (BOG) of liquefied natural gas
  • System and method for re-condensing boil off gas (BOG) of liquefied natural gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0070] Such as image 3 As shown, the BOG recondensation system of the LNG receiving station mainly includes an LNG storage tank 101, a low-pressure pump 102 inside the LNG tank, a booster pump 104 outside the LNG tank, a BOG compressor 105, a BOG compressor outlet heat exchanger 106, a gasification Device 107, torch 108, static mixer 109, gas-liquid separator 110. The BOG produced in the storage tank enters the BOG compressor 105 for pressurization through the evaporating gas main pipe, and then enters the static mixer 109 after heat exchange by the heat exchanger 106 . The LNG in the storage tank has a certain degree of subcooling after being pressurized by the low-pressure pump 102 in the tank, and a part of the LNG enters the static mixer 109 to exchange heat with the BOG. The mixed heat-exchanged fluid enters the gas-liquid separator 110 for gas-liquid separation, the separated gas returns to the BOG main pipe, and the separated liquid returns to the LNG low-pressure exp...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a system and a method for re-condensing a boil off gas (BOG) of a liquefied natural gas. The system comprises a liquefied natural gas storage device, a BOG re-condensing device and a liquefied natural gas conveying device, wherein the BOG re-condensing device comprises a static mixer and a gas-liquid separator, an outlet in the top of the gas-liquid separator is connected with a BOG main pipe of a liquefied natural gas storage tank, an outlet in the bottom of the gas-liquid separator is connected with a liquefied natural gas low-pressure outward conveying main pipe, one end of the static mixer is connected with the gas-liquid separator, the other end of the static mixer is connected with the liquefied natural gas low-pressure outward conveying main pipe, and the BOG main pipe is sequentially connected with a compressor and a heat exchanger to be connected with the static mixer. The method includes mixing the liquefied natural gas and the BOG in the static mixer, then feeding the liquefied natural gas and the BOG into the gas-liquid separator, returning a separated gas to the BOG main pipe, and feeding a separated liquid phase into a booster pump outside the tank. According to the system and the method for re-condensing the BOG of the liquefied natural gas, by means of a static mixing and condensation manner, condensation efficiency of the BOG is increased, energy consumption is reduced, and purposes of saving equipment investment and facilitating system operation and maintenance are achieved.

Description

technical field [0001] The invention relates to the field of liquefied natural gas storage and delivery systems, and more particularly, to a system and method for recondensing liquefied natural gas boil-off gas. Background technique [0002] Liquefied natural gas (LNG) is a high-quality energy source with the characteristics of high calorific value and low combustion pollution. The main function of the LNG receiving station is to receive LNG transported by ocean-going ships, store and gasify it to obtain gaseous natural gas (NG) products, and supply gas to urban residents and / or industrial users through the natural gas pipeline network. [0003] During the production process of the LNG receiving station, due to various factors such as storage tanks, pipelines, equipment, etc. absorbing heat from the environment, unloading flash evaporation, and atmospheric pressure changes, a certain amount of evaporation will be released from the LNG in the LNG storage and transportation sy...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F25J1/00
Inventor 赵广明李凤奇李明李海燕刘青王燕飞赵睿
Owner SINOPEC ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap