Container-type LNG (Liquefied Natural Gas) filling device and station control method

Abstract

The invention discloses a container-type LNG (Liquefied Natural Gas) filling device and a station control method, belongs to the technical field of LNG. The container-type LNG aerated device comprises a container, wherein a storage tank area is arranged in the container and used for accommodating a storage tank; two ends of the container are respectively provided with an operating area and a control room, the operating area is internally provided with gas filing equipment, unloading equipment and an LNG pipeline system, and the gas filling equipment and the unloading equipment are connected with the storage tank by virtue of the LNG pipeline system; the control chamber is internally provided with a monitoring instrument; a instrument and a pipeline valve on the LNG pipeline system are connected with the monitoring instrument and controlled by the monitoring instrument. The LNG storage tank and the gas filling equipment are integrated in the container, the potential safety hazard that the gas filling equipment is exposed is solved; the purpose of filling LNG while unloading can be realized, the pressure rating of a steel bottle can be automatically identified, and different steel bottle pressures are automatically and safely filled by virtue of a control system; the temperature and pressure of the storage tank can be detected, when the alarm happens, the container-type LNG filling device performs unloading automatically, and the alarm information is sent to a preset mobile phone in a short message service manner; a video monitoring system has no dead angle, drivers can automatically add LNG, and an unattended operation mode is realized.

Description

technical field [0001] The invention relates to the technical field of LNG, in particular to a container-type LNG technology. Background technique [0002] LNG is the abbreviation of Liquefied Natural Gas in English. After natural gas is purified (removing impurities such as CO2, sulfide, hydrocarbons, and water), it is cryogenically cooled to -162°C under normal pressure, and changes from a gaseous state to a liquid state. It is called liquefied natural gas, and the volume of liquefied natural gas is the same The volume of gaseous natural gas is 1 / 625, and the weight is about 45% of the same volume of water. [0003] As a clean energy, LNG is widely used in various fields. When it involves automobiles, ships and other fields, it needs to be refueled. At present, the commonly used LNG refueling device is to store LNG in the LNG storage tank and refill it through the refueling facilities connected to the LNG storage tank; the LNG storage tank and the refueling facilities ar...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a container-type LNG refilling device and a station control method for the above-mentioned problems, which integrate the LNG storage tank and refueling facilities into the container, and solve the problem that the refilling device is exposed to the outside. It also solves the problem of LNG long-distance transportation and fixed-point gas filling, and can implement (temporary gas filling) without a permanent gas filling device in some special occasions; it can realize liquid filling while unloading, and can automatically identify steel cylinders Pressure level, the control system can automatically fill different steel cylinders safely; it can detect the temperature and pressure of the storage tank, and the alarm will be automatically discharged; the video monitoring system has no dead ends, no need for human guards, and reduces labor costs; Pressure, saturation adjustment, automatic discharge and other basic functions, with a high degree of automation

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