BOG condensation recycling system and method for LNG station

A technology of condensation recovery and condensation recovery, which is applied in the field of BOG condensation recovery system, can solve the problems of storage and transportation pressure rise, economic loss, environmental pollution, etc., and achieve the effect of reducing heat exchanger surface, stable and reliable operation, and avoiding pollution

Active Publication Date: 2015-12-09
成都深冷科技有限公司
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AI Technical Summary

Problems solved by technology

With the increasing heat absorption of LNG, the production of BOG will gradually increase, and the pressure of LNG storage and transportation will also continue to rise. In this case, if no effective pressure reduction measures are taken, in order to avoid accidents such as overpressure and safety, When the pressure of LNG storage and transportation reaches a certain pressure, it will generally release the pressure to the atmosphere automatically or manually. The release of BOG will cause environmental pollution, energy waste and economic loss

Method used

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  • BOG condensation recycling system and method for LNG station

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Embodiment

[0031] Such as figure 1As shown, a BOG condensation recovery system for LNG gas filling station, including LNG storage tank 1, BOG condensation recovery device 2, submersible pump 3 and liquid nitrogen storage device 4, the liquid inlet pipe of submersible pump 3 passes through the pipeline Connect the discharge pipe of the LNG storage tank 1, the discharge pipe of the submersible pump 3 is connected to the gas dispenser through the pipeline, and the discharge pipe of the submersible pump 3 is also connected to the heat source channel inlet of the BOG condensation recovery device 2 through the pipeline, and the BOG condensation recovery The outlet of the heat source channel of device 2 is connected to LNG storage tank 1 through pipelines, the inlet of cold source channel of BOG condensate recoverer 2 is connected to the drain pipe of liquid nitrogen storage device 4 through pipelines, and the outlet of cold source channel of BOG condensate recoverer 2 is connected to Nitrogen ...

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Abstract

The invention discloses a BOG condensation recycling system for an LNG station. A liquid inlet pipe of an immersed pump (3) is connected with a liquid drain pipe of an LNG storage tank (1) through a pipeline. A liquid drain pipe of the immersed pump (3) is connected with a gas filling machine through a pipeline and further connected with a heat source channel inlet of a BOG condensation recoverer (2) through a pipeline. A heat source channel outlet of the BOG condensation recoverer (2) is connected with a liquid drain pipe of a liquid nitrogen storage device (4) through a pipeline. A cold source channel outlet of the BOG condensation recoverer (2) is connected with a nitrogen blow-down pipe. The invention further discloses a method for recycling BOG. The BOG condensation recycling system and method have the beneficial effects that cost is reduced, zero discharge of BOG in the storage tank is achieved, energy is saved, and pollution to environment is avoided.

Description

technical field [0001] The invention relates to the technical field of BOG gas recovery, in particular to a BOG condensation recovery system and method for LNG filling stations. Background technique [0002] LNG (liquefied natural gas) is a clean energy. With the gradual and widespread application of LNG fueled vehicles (ships), urban residential gas, boiler gas and gas power generation, ceramic sintering and other fields, the demand for LNG consumption is showing a rapid growth trend in recent years. There are two main sources of LNG, namely the so-called "land gas" (LNG produced by onshore LNG liquefaction plants, usually transported by LNG transport vehicles), "sea gas" (overseas LNG, usually transported by large LNG LNG is transported by ship to land LNG receiving terminal and stored). The liquefaction temperature of LNG under normal pressure is about -162°C. Although the LNG storage and transportation equipment or LNG transportation pipelines have taken good cold prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C13/00F17C13/02F17C13/04F17D1/14
Inventor 郑群芳程星宇
Owner 成都深冷科技有限公司
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