A natural gas BOG reliquefaction plant
By using a heat exchange and control system between the LNG storage tank and the nitrogen storage tank, and by utilizing liquid nitrogen heat exchange and compression components, the problem of poor liquefaction effect during BOG reliquefaction was solved, thus achieving efficient BOG liquefaction and LNG transportation.
CN224364674UActive Publication Date: 2026-06-16XIDIAN UNIV HANGZHOU RES INST +3
Patent Information
- Application Number
- CN202521117982.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-03
- Publication Date
- 2026-06-16
- Estimated Expiration
- 2035-06-03
AI Technical Summary
Technical Problem
In existing technologies, the liquefaction effect is poor due to the large number of pipelines during the BOG reliquefaction process, resulting in the problem of LNG being revaporized into BOG.
Method used
By using liquid nitrogen for heat exchange between the LNG storage tank and the nitrogen storage tank, combined with the ventilation motor and the valve motor to control the flow of BOG, and combined with the compression assembly to achieve the reuse of liquid nitrogen, the liquefaction efficiency and accuracy are improved.
Benefits of technology
This improved the liquefaction efficiency of BOG, saved resources, reduced costs, and ensured the transportation effect and liquefaction accuracy of LNG.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224364674U_ABST
Abstract
The utility model discloses a natural gas BOG re-liquefaction device, including LNG storage tank and nitrogen storage tank, LNG storage tank's BOG gas export through the air extraction subassembly and the BOG gas import of cooling pipe intercommunication, and the liquid nitrogen import of heat exchange of nitrogen storage tank's liquid nitrogen export through the nitrogen pump intercommunication, and the cooling pipe is nested in the heat exchange pipe, and the LNG import of LNG storage tank's LNG export of cooling pipe through the liquid pump intercommunication, and the liquid nitrogen import of nitrogen storage tank's nitrogen gas export of heat exchange pipe through the compression component intercommunication, the utility model discloses through the liquid nitrogen delivery to the heat exchange pipe inside, for the BOG cooling of cooling pipe inside, make BOG liquefaction into LNG, and the nitrogen gas after evaporation through the compression component re-liquefaction into liquid nitrogen, not only can improve liquefaction efficiency, guarantee liquefaction effect, and realize the recycling of liquid nitrogen to save resources, reduce cost.
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Citation Information
Patent Citations
BOG reliquefaction process and its reliquefaction recovery system
CN104792114B