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BOG re-liquefaction system

A technology for reliquefaction and control systems, which is applied in gas/liquid distribution and storage, equipment loaded into pressure vessels, methods of vessel discharge, etc. Efficiency, reasonable configuration, cost saving effect

Pending Publication Date: 2019-05-24
JIANGSU DINGCHENG NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a BOG reliquefaction system that can solve the existing problems of energy waste, self-discharge risk and environmental pollution by treating the BOG produced in the LNG storage tank by means of venting in the prior art

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  • BOG re-liquefaction system

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Embodiment Construction

[0024] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0025] see figure 1 As shown, a BOG reliquefaction system includes several reliquefaction equipment, each reliquefaction equipment includes a low-temperature liquid buffer tank 1, a refrigeration device 2, a heat dissipation device 3, and a control system 10, and the low-temperature liquid buffer tank 1 is connected to There is a refrigeration device 2, the refrigeration device 2 includes a hot end 21 and a cold end 22, the heat sink 3 is connected to the hot end 21 of the refrigeration device 2, and the low-temperature liquid buffer tank 1 is connected to the LNG storage tank through the gas inlet pipe 6. The low-temperature liquid buffer tank 1...

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Abstract

The invention discloses a BOG re-liquefaction system, which comprises a plurality of re-liquefaction devices. Each re-liquefaction device comprises a cryogenic liquid buffer tank, a refrigeration device, a heat dissipation device and a control system, the refrigeration devices are connected to the cryogenic liquid buffer tanks and comprise hot ends and cold ends, the heat dissipation devices are connected to the hot ends of the refrigeration devices, the cryogenic liquid buffer tanks are connected with an LNG storage tank through gas inlet pipes and liquid reflux pipes, gas inlet valves are arranged on the gas inlet pipes, liquid reflux valves are arranged on the liquid reflux pipes, and the control systems are in signal connection with the gas inlet valves, the liquid reflux valves, the refrigeration devices and the LNG storage tank. According to the BOG re-liquefaction system, the starting number of the re-liquefaction devices can be adjusted by controlling an electric valve on a re-liquefaction device parallel-connection pipeline according to the needs, and effective recovery of BOG, cost saving and reasonable configuration can be realized.

Description

technical field [0001] The invention relates to the technical field of gas reliquefaction, in particular to a BOG reliquefaction system. Background technique [0002] Liquefied natural gas (LNG) is condensed into a liquid by cooling gaseous natural gas at normal pressure to -162°C. Natural gas liquefaction can greatly save storage and transportation space, and has the characteristics of large calorific value and high performance. The low-temperature LNG stored in the LNG storage tank will generate BOG due to heat exchange with the outside world. In order to ensure the safety of equipment, the generated BOG is usually discharged directly into the atmosphere, resulting in waste of resources, environmental pollution, and potential safety hazards. [0003] At present, the reliquefaction recovery method of BOG mainly uses liquid nitrogen to liquefy and recover BOG. ​​This method requires a large amount of equipment investment, and the process is complicated. At the same time, d...

Claims

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Application Information

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IPC IPC(8): F17C5/02F17C13/00F17C13/02
Inventor 张小雪汪洋唐晓伟
Owner JIANGSU DINGCHENG NEW ENERGY TECH CO LTD