Views: 0 Author: Site Editor Publish Time: 2024-08-01 Origin: Site
As the global demand for energy continues to grow, liquefied natural gas (LNG) has become an important source of energy due to its clean and efficient characteristics. The transportation of LNG, especially over land, is inseparable from a specially designed low-temperature liquid transport semi-trailer—LNG tankers. This article will take you through the "cold"technology of modern energy transportation
what is an LNG tanker truck?
An LNG tanker truck is a type of semi-trailer specifically designed for the transportation of liquefied natural gas (LNG) at low temperatures. It consists of a tractor unit, an tank body, an operation box, and a semi-trailer walking mechanism. The tank body is mounted on the semi-trailer walking machanism, while the operation box is located at the rear of the tank body, housing low-temperature operation valves, pressure gauges, level meters, and other accessories, facilitating the loading and unloading operations.
Tank body structure:Double-layered inside and out to ensure safety:
The tank body of an LNG tanker truck is composed of an inner tanke and outer tank that are welded together. The inner tank is the main component, made of low-temperature-resistant S30408 stainless steel material, capable of withstanding internal pressure and maintaining extreme low temperatures of -196 degrees Celsius. To ensure stable operation after loading, the tank is equipped with anti-vortex plates inside, and its outer surface is wrapped with multiple layers of insulation material to maintain the low temperature and prevent the instrusion of heat.
Safety devices:Multiple layers of protection to ensure transportation safety
LNG tanker trucks are equipped witn a variety of safety devices, including:
Pneumatic emergency shut-off device:In emergency situations, it allows for the rapid cut off of LNG flow through manual or automatic control to prevent the accident from escalating
Combination safety valve:When the pressure inside the tank abnormally increases, the safety valve will automatically release the pressure to protect the tank from damage.
Level gauge: Utilizing the principle of differential pressur, it can only provide an approximate value of the liquid level, but it is crucial for the loading operation
Static discharge strip: A static conductive strip is located at the rear of the tanker, effectively discharging the static electricity generated during operation and preventing sparks from causing hazards.
Operation box valve function:Precise control for efficient loading and unloading.
The valves inside the operation box each have their unqiue features, such as:
Top liquid inlet valve:Controls the loading process of LNG
Booster discharge valve:Used during the unloading and pressurization process to ensure the smooth discharge of LNG.
Vent valve:Used to release pressure inside the tank to maintain transportation safety.
Overfill prevention valve:Used when the filling is near capacity to prevent overfilling.
LNG tanker trucks, as an important tool in modern energy transportation, are designed with a combination of high technology and safety considerations. They not only improve the efficiency of energy transportation but also ensure the safety of the transportation process. As the position of LNG in the global energy structure continues to rise, the application of LNG tanker trucks will also become more and more widespread, becoming an important link between energy production and consumption.
