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Multifunctional fair metering system and metering method based on LNG tank car

A metering system and multi-functional technology, applied in the multi-functional fair metering system and the field of metering, can solve the problems of unrealistic loading and unloading of LNG tankers, and achieve the effect of satisfying refined management, reducing trade disputes and saving space.

Pending Publication Date: 2022-07-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, according to the development trend of natural gas energy measurement, it can be predicted that liquid products (LNG) will gradually realize energy measurement, but currently domestic LNG tanker loading and unloading cannot be realized

Method used

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  • Multifunctional fair metering system and metering method based on LNG tank car

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like figure 1 As shown in the figure, a multi-functional fair metering system based on LNG tanker includes a first valve 1, a pressure gauge of a liquid storage tank 2, a liquid storage tank 3, a liquid level gauge of the liquid storage tank 4, a second valve 5, a vaporizer 6. The third valve 7, the online chromatographic analyzer 8, the tank level gauge 9, the temperature transmitter 10, the pressure transmitter 11 and the flow computer 12;

[0025] The liquid storage tank 3, the vaporizer 6, the online chromatographic analyzer 8, the liquid level gauge in the tank 9, the temperature transmitter 10, and the pressure transmitter 11 are arranged in the rear operation box of the LNG tanker; the flow computer 12 is arranged in the In the cockpit of LNG;

[0026] The first valve 1 and the liquid storage tank 3 are connected by pipelines, the tank pressure gauge 2 is arranged on the liquid storage tank 3 through the line, the liquid storage tank level gauge 4 is arranged in...

Embodiment 2

[0028] On the basis of the above-mentioned Embodiment 1, the present invention also refers to a multi-functional fair metering method based on LNG tankers, which specifically includes the following steps:

[0029] Step 1: Open the first valve, let the LNG in the tanker enter the liquid storage tank, and observe the indication of the liquid level gauge of the liquid storage tank;

[0030] Step 2: When the liquid in the tank is full, close the first valve, open the second valve and the third valve, the LNG enters the gasifier for gasification, the gas after gasification enters the online chromatographic analyzer for component analysis, and then returns inside a tanker;

[0031] Step 3: After the component analysis is completed and the liquid in the liquid storage tank is completely vaporized, the second valve and the third valve are closed; at the same time, the analysis results are transmitted to the flow computer, and the flow computer automatically calculates the LNG loading ...

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Abstract

The invention discloses a multifunctional fair metering system and metering method based on an LNG tank car, and belongs to the technical field of metering. The system comprises a first valve, a liquid storage tank pressure gauge, a liquid storage tank, a liquid storage tank liquid level meter, a second valve, a gasifier, a third valve, an online chromatographic analyzer, an in-tank liquid level meter, a temperature transmitter, a pressure transmitter and a flow computer. According to the invention, multiple metering modes of volume metering, mass metering and energy metering can be realized, accurate metering can be ensured, trade disputes are reduced, the working efficiency is improved, and the device can be widely applied to the fields of trade handover of liquid natural gas (LNG), liquefied petroleum gas (LPG), ethane (C2) and the like.

Description

technical field [0001] The invention belongs to the field, and in particular relates to a multifunctional fair metering system and a metering method based on an LNG tanker. Background technique [0002] For liquefied natural gas (LNG), LNG tanker transportation is currently one of the main sales methods in China. During the custody transfer process, it is necessary to accurately and efficiently measure the LNG filled or unloaded by the tanker to improve work efficiency. , to ensure fairness and science, reduce trade disputes, and meet the requirements of refined management of LNG terminals. [0003] At present, the measurement method of domestic LNG tanker transportation is mainly mass measurement, that is, the electronic truck scale weighing device installed at the LNG receiving station is used to calculate the weight by weighing the mass of the empty truck before loading and the mass of the full truck after loading. The difference is the filling quality of LNG. There are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C5/02F17C7/04F17C13/00F17C13/02F17C13/04
CPCF17C5/02F17C7/04F17C13/00F17C13/025F17C13/026F17C13/02F17C13/023F17C13/028F17C13/04F17C2221/033F17C2250/0426F17C2250/0439F17C2250/043F17C2250/0421F17C2250/0408F17C2270/0168
Inventor 牛淑昊柳智苏鲲张大伟王剑琨葛豫炜张沛钰王杉伍建良
Owner CHINA PETROLEUM & CHEM CORP
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