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Liquefied natural gas recondensation method and device

A technology of liquefied natural gas and re-condensation, applied in liquefaction, refrigeration, liquefaction, solidification and other directions, can solve the problems of unsatisfactory control effect and complicated control method, improve safety and economic benefits, promote condensation recovery, and stabilize inlet pressure Effect

Inactive Publication Date: 2018-02-23
LUOYANG PETROCHEMICAL ENG CORP SINOPEC +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problems in the prior art that the control method is relatively complicated and the control effect is not ideal, the present invention provides a method and device for recondensing liquefied natural gas

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  • Liquefied natural gas recondensation method and device
  • Liquefied natural gas recondensation method and device
  • Liquefied natural gas recondensation method and device

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] see figure 1 , the liquefied natural gas recondensation device of the present invention is mainly composed of an inlet expansion pipe 1, a condensing straight pipe 2, a gas-liquid turning device 3 and a buffer tank 4, wherein the gas-liquid turning device 3 and the condensing straight pipe 2 are alternately connected to form a horizontal condensing pipe , the horizontal condensing pipe communicates with the middle part of the buffer tank 4 with a section of straight condensing pipe, and the gas-liquid flipper 3 and the straight condensing pipe 2 can be flanged or welded.

[0024] see Figure 2~4 , the gas-liquid turner is tubular as a whole, mainly composed of a tube shell 5 and a turning blade 6, the tube shell 5 is a round tube; the turning blade 6 is fixed on the inner wall of the tube shell 5 by welding, in a 180° spiral shape, and ...

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Abstract

The invention discloses a liquefied natural gas recondensation method and device. The recondensation method includes the steps that BOG coming from a BOG header pipe is compressed to be mixed with LNGof an LNG lower pressure header pipe to enter a horizontal condenser pipe, repeated gas-liquid overturning is carried out to conduct mixed contact in a multi-phase flow manner, BOG condensation and recovering are carried out, and the LNG obtained after BOG condensation and recovering enters a buffer tank to be subject to gas-liquid separation; and the recondensation device is mainly composed of the horizontal condenser pipe and the buffer tank, the horizontal condenser pipe is communicated with the middle portion of the buffer tank, and the horizontal condenser pipe is mainly formed by alternatively connecting a gas-liquid overturning device and a condensation straight pipe. By means of the liquefied natural gas recondensation method and device, the recondensation link of an LNG receivingstation process is simplified, the complex control link is saved, and the LNG receiving station operation safety and economical benefits are improved.

Description

technical field [0001] The invention relates to a treatment technology of liquefied natural gas boil-off gas (BOG), in particular to a method and device for recondensing liquefied natural gas (LNG). Background technique [0002] The liquefied natural gas receiving station is the terminal link in the LNG industry chain. It receives liquefied natural gas from the LNG ship and transports it to downstream users after storage and regasification. In the receiving station system, due to pump operation, environmental heat leakage and unloading Displacement effects, cold insulation of equipment pipelines, etc. will cause the liquefied natural gas at extremely low temperature (-162°C) to vaporize to produce boil-off gas (BOG). [0003] The BOG recovery and treatment process at the LNG receiving station mainly includes direct compression and export, condensing into LNG through a recondenser, pressurization, gasification and export. The direct compression and export process requires dow...

Claims

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Application Information

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IPC IPC(8): F25J1/00C10L3/10
CPCC10L3/10F25J1/0025F25J1/004
Inventor 王以斌李战杰常征何建明王文昊何龙辉李津王惠勤杜富国
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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