Boil Off Gas (BOG) recycle and reliquefaction device

A technology of reliquefaction and pressurization device, applied in the field of BOG recovery and reliquefaction device, can solve the problems of unrealistic popularization, high cost and complicated technology, and achieve the effect of reducing energy consumption, simple structure and improving economic benefits.

Inactive Publication Date: 2018-11-02
BENGBU AIPU COMPRESSOR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for small and medium-sized LNG filling stations to use this method to process BOG, the technology is complicated and the cost is relatively high, so it is not realistic to popularize it.

Method used

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  • Boil Off Gas (BOG) recycle and reliquefaction device

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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0016] Such as figure 1 As shown, a BOG recovery and reliquefaction device provided by the present invention is characterized in that it includes an LNG tank car 1, the LNG tank car 1 is connected to the buffer tank 2 through the first pipeline 11, and the buffer tank 2 is connected to the pressurized tank through the second pipeline 12 Device 3, the booster device 3 is a low-temperature BOG compressor. The booster 3 compresses the BOG to 0.6-0.8MPa. The supercharging device 3 is connected to the refrigeration unit 4 through the third pipeline 13, and the refrigeration unit 4 is a cascade refrige...

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Abstract

The invention discloses a Boil Off Gas (BOG) recycle and reliquefaction device. The BOG recycle and reliquefaction device comprises an LNG tank car; the LNG tank car is connected with a buffering tankby a first pipeline; the buffering tank is connected with a pressurization device by a second pipeline; the pressurization device is connected with a refrigerator unit by a third pipeline; the refrigerator unit is connected with a gas-liquid separator by a fourth pipeline; the liquid phase outlet of the gas-liquid separator is connected with the upper liquid opening of an LNG storage tank by a fifth pipeline; the gaseous phase outlet of the gas-liquid separator is connected with the lower liquid inlet of the LNG storage tank by a sixth pipeline; the sixth pipeline is sequentially connected with a deep freezer and a check valve in the direction from the gas-liquid separator to the LNG storage tank; the upper side outlet of the LNG storage tank is connected with one end of a seventh pipeline; and one end of the seventh pipeline communicates with the first pipeline. The BOG recycle and reliquefaction device has the advantages that energy consumption is effectively reduced, cold energy inthe LNG storage tank can be effectively used for automatic cooling, and economic benefit is improved.

Description

technical field [0001] The invention relates to the technical field of BOG recovery, in particular to a BOG recovery and reliquefaction device. Background technique [0002] BOG is Boil Off Gas, which refers to low-temperature liquids, such as LNG (-162°C), low-temperature propane (-40-42°C), low-temperature alkanes (0--2°C), etc., which absorb external heat in the storage tank and then volatilize formed gas. As the volatile gas in the storage tank increases, the pressure in the storage tank continues to rise. In order to maintain the pressure of the storage tank within the allowable range, it must be released to ensure the safety of the storage tank. However, if BOG is directly discharged into the atmosphere, the waste of resources will be considerable; according to statistics, a filling station that sells 40 tons of LNG per day will discharge 280-340kg of BOG a day, and the loss amount will reach 3300-4100 yuan. The loss is more than one million, and the waste is quite a...

Claims

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Application Information

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IPC IPC(8): F25J1/02
CPCF25J1/0237
Inventor 王淮北王敏吴海光
Owner BENGBU AIPU COMPRESSOR MACHINERY
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