A filling process of LNG skid-mounted filling station

Abstract

The present invention relates to the technical field of LNG gas filling station gas filling, particularly to an LNG skid-mounted filling station filling process, wherein the process technology of the LNG skid-mounted filling station is divided into four parts such as the unloading process, the pressure adjusting process, the filling processes and the pressure relief process. According to the present invention, with the technical route, the low temperature pump is completely utilized to perform unloading, pressure adjusting and gas filling, such that the equipment configuration of the gas filling station is substantially reduced, the process pipeline is shortened, the route is the basis for achieving the skidding, the good economic benefits are achieved, and the good use value is provided.

Description

technical field [0001] The invention relates to the technical field of LNG filling station gas filling, in particular to a filling process of an LNG skid-mounted filling station. Background technique [0002] Liquefied natural gas (LNG) vehicles are a new type of environmentally friendly vehicles developed after compressed natural gas (CNG) and liquefied petroleum gas (LPG) vehicles. Due to the advantages of fuel density, low pressure, and light weight of the required fuel tank, the driving mileage (300-800KM) of a car is much longer than that of CNG. At the same time, LNG can be transported like oil. These characteristics make it unique Strong practicality. [0003] Since the start of LNG vehicle technology, all major developed countries in the world have attached great importance to the development and promotion of this technology. my country has also slowly started in this area. Some technologies and equipment levels, such as storage equipment, pipelines, cold insulation...

AI Technical Summary

Problems solved by technology

[0004] (1) The overall technical route is unreasonable;

[0005] (2) Cryogenic pumps and their supporting technologies are not perfect;

[0006] (3) The thermal insulation of the system is poor, and the evaporation loss rate is high;

[0007] (4) The measurement accuracy of the gas vending machine and the flow of the gas vending machine have not reached the ideal state;

[0008] (5) The gas filling station does not match the vehicle system;

[0009] (6) The pipeline fluid state control technology is not up to standard, and the heat leakage and evaporation rate indicators are too large;

[0010] (7) The safety detection and control technology does not agree, and the reliability is not high;

[0012] (9) Without design and construction specifications, it is difficult to promote and apply for approval

[0013] The skid-mounted LNG filling station does not depend on the natural gas pipeline network and gas source, has a small footprint, a high degree of integration, advanced technology, safety and reliability, small investment, short station construction period, easy operation and relocation, and flexible; however, the skid Mounted LNG filling stations have special requirements for safety and energy consumption, which has led to a technical problem of how to improve the safety of operation and use, and how to reduce the energy consumption of skid-mounted LNG

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