Skid-Mounted Mobile LNG Refueling Station
Through modular integrated design, the skid-mounted mobile LNG refueling station integrates all key equipment required for LNG refueling onto a single skid, forming a compact and efficient mobile refueling system. It provides a flexible and convenient solution for refueling LNG-fueled vehicles.
I. Composition of Integrated Core Equipment
Centered on functional synergy, the skid system integrates six categories of key equipment. Each component performs its dedicated functions and coordinates closely with others to ensure the smooth and safe operation of the refueling process:
LNG Cryogenic Pump Sump: Serving as the core foundation for cryogenic liquid transfer, it provides a stable installation environment and cryogenic protection for the submersible pump, ensuring the pump operates normally under ultra-low temperature conditions. Meanwhile, it realizes preliminary flow stabilization and buffering of LNG.
Cryogenic Submersible Pump: Undertaking the task of pressurized transfer of LNG, it can deliver LNG stored on the skid to the refueling dispenser at a stable pressure by virtue of its cryogenic resistance. It is the power core for efficient refueling.
LNG Refueling Dispenser: As the terminal equipment for refueling operations, it integrates functions such as flow metering, pressure regulation, and safety control. It can accurately realize quantitative refueling of LNG into vehicle gas cylinders and is equipped with an emergency shutdown device to ensure operational safety.
Pipeline and Valve System: It constructs the LNG transfer channel between equipment, adopting cryogenic-resistant stainless steel pipelines and special cryogenic valves. These components feature excellent sealing performance and resistance to cryogenic embrittlement, enabling full-process safe and controllable LNG transfer. Additionally, protective components such as safety valves and check valves are equipped.
Vaporizer: Divided into main vaporizers and subcooled LNG vaporizers. The main vaporizer can vaporize part of LNG into gaseous natural gas, which is used for system pressure maintaining or emergency gas supply. The subcooled LNG vaporizer performs slight heating on LNG before refueling to prevent damage to vehicle gas cylinders caused by direct injection of ultra-low temperature liquid.
PLC Control System: Acting as the "central nervous system" of the entire skid, it realizes real-time monitoring and automatic regulation of operating parameters (such as pressure, temperature, and flow) of various equipment through centralized control modules. It is equipped with functions such as fault alarm and emergency shutdown, greatly improving the stability and safety of system operation.
II. Working Process and Connection Mode
The operation process of the skid-mounted LNG refueling station is concise and efficient, with the core connection and operation links as follows: Firstly, the skid is connected to the liquid-phase outlet of the LNG tank truck through a special metal hose. The metal hose has good flexibility and cryogenic resistance, which can adapt to installation errors between the tank truck and the skid and ensure reliable connection sealing. Subsequently, the cryogenic submersible pump is started through the PLC control system. LNG in the tank truck enters the cryogenic pump sump of the skid through the metal hose, and then is pressurized by the submersible pump and delivered to the LNG refueling dispenser. The operator connects the refueling dispenser to the gas cylinder of the LNG vehicle; after starting the refueling program, the dispenser completes quantitative refueling according to the set parameters. The entire process is fully monitored by the PLC system to ensure that indicators such as pressure and flow comply with safety specifications.
III. Core Advantages and Application Scenarios
Compared with traditional fixed LNG refueling stations, the skid-mounted mobile LNG refueling station demonstrates significant advantages through its unique design and precisely meets specific application requirements:
1. Core Advantages
High Mobility: The entire set of equipment is integrated on a standard skid, which can be quickly transferred by means of transport vehicles such as trailers. No complex civil engineering is required, greatly enhancing site adaptability.
Small Floor Space: Adopting a modular compact layout, the skid usually covers an area of only tens of square meters, which is much smaller than fixed refueling stations. It can be quickly deployed in narrow spaces.
Short Deployment Cycle: Most of the equipment assembly and commissioning are completed before delivery from the factory. On-site, only simple procedures such as hose connection and power access are needed, and it can usually be put into use within a few days.
Flexible Operation: The parking position can be flexibly adjusted according to the distribution of LNG vehicles, realizing "on-demand deployment" and effectively reducing operation costs.
2. Application Scenarios
Temporary Refueling Needs: Suitable for transitional refueling services during the construction of fixed refueling stations, or temporary LNG vehicle refueling needs at large engineering project sites.
Mobile LNG Refueling Stations: For areas with concentrated LNG vehicles but lacking fixed refueling facilities, such as remote areas, mining areas, and ports, it can serve as a regular mobile refueling service point.
Emergency Support Scenarios: In emergency situations such as natural disasters and equipment failures, it can be quickly transported to the site to provide stable energy supply for rescue LNG vehicles.
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