Liquefied natural gas filling station BOG utilization system

A technology of liquefied natural gas and gas, which is applied in the pipeline system, gas/liquid distribution and storage, mechanical equipment, etc. It can solve the problems of waste of resources and only empty discharge, etc., and achieves easy disassembly and maintenance, small footprint, and guaranteed safety effect

Inactive Publication Date: 2013-12-11
TIANJIN ENERGY TECH OF GAS
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Problems solved by technology

If this part of the residual gas cannot be used, it can only be discharged into the air, resulting in a

Method used

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  • Liquefied natural gas filling station BOG utilization system

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Embodiment Construction

[0024] Such as figure 1 As shown, the BOG gas utilization system of the liquefied natural gas filling station of the present invention is connected with a low-temperature emergency shut-off valve 1, a BOG heater, a low-temperature stop valve 3, a pressure reducing valve 11, a pressure gauge 6, and a thermometer in sequence from the inlet of the main pipeline. 7. The temperature transmitter 8 and the natural gas compressor 9, the low temperature stop valve 3 is connected in parallel with a reheater, the pressure reducing valve 11 is connected in parallel with a bypass stop valve 5, and also includes a combustible gas alarm 10. The BOG heater is preferably an air-heated BOG heater 2. The reheater is preferably an electric hot water bath type reheater 12, and a valve 4 is provided at the inlet and outlet respectively. A valve 4 is provided at each end of the pressure reducing valve 11. The pressure gauge 6 is provided with a valve 4 on the pipeline connected with the main pipeli...

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Abstract

The invention provides a liquefied natural gas filling station BOG utilization system. A low-temperature emergency cut-off valve, a BOG carburetor, a low-temperature stop valve, a pressure reducing valve, a pressure gauge, a temperature gauge, a temperature transmitter and a natural gas compressor are sequentially connected with an inlet of a main pipeline, the low-temperature stop valve is in parallel connection with a recuperator, the pressure reducing valve is in parallel connection with a bypass stop valve, and the liquefied natural gas filling station BOG utilization system further comprises a combustible gas alarm apparatus. The liquefied natural gas filling station BOG utilization system has the advantages that after being heated, the BOG is pressurized into CNG, energy resources are saved, economic benefits are brought to a user, the device is small in occupied area and low in cost, and therefore large-scale popularization is facilitated.

Description

Technical field [0001] The invention belongs to an integrated liquefied natural gas filling station equipment, and particularly relates to a residual gas utilization system in which BOG (flash gas) gas of a liquefied natural gas filling station is compressed into CNG (compressed natural gas). Background technique [0002] Natural gas is a clean and efficient new energy. Its production and use have made great progress in my country. Because of its obvious advantages, LNG (liquefied natural gas) vehicles are currently widely used, and LNG vehicle filling stations have been built on a large scale. However, such filling station systems will produce A lot of BOG gas. BOG gas refers to the gas formed by the gasification of liquid natural gas. BOG mainly comes from the return gas of LNG tankers and the natural gasification of about 0.3% per day in the LNG storage tank. If this part of the remaining gas cannot be used, it can only be discharged into the air, resulting in a waste of resou...

Claims

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Application Information

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IPC IPC(8): F17D1/02
Inventor 杨国亮高红星王雨
Owner TIANJIN ENERGY TECH OF GAS
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