Product Description

Brand Hoogou Group Model CFW-60/0.8

Material: Stainless Steel, Diameter: 2916mm

Application Range: -162℃; Volume: 60,000L

Wall Thickness: 8mm, Outer Dimensions: φ2916*14929mm

Origin: Shandong Heze

Heze LNG Storage Tank, Low Temperature Oxygen/Nitrogen/Argon Carbon Dioxide Storage Tank, 60 Cubic Meters LNG Tank

Low-temperature LNG storage tanks are high-vacuum insulated stainless steel pressure vessels, designed for the storage, transportation, and use of liquefied natural gas. These containers are manufactured according to GB18442 standards and are used for reliable and cost-effective transportation and storage of cryogenic liquids, as well as for on-site storage and supply of liquefied gases across a wide range of applications.

With the development of low-temperature liquid transportation, the insulation technology for low-temperature containers has become increasingly refined. To maintain the storage and transportation of low-temperature liquids as well as the temperature for low-temperature refrigeration, insulation measures must be taken for the low-temperature environment. Only under insulation conditions can low temperatures be maintained. Insulation can reduce vaporization loss, or create conditions for the long-distance and extended transportation of low-temperature liquids.

Low-temperature insulation methods can be divided into two major categories: general insulation and vacuum insulation.

(1) Ordinary insulation is an older, traditional method that involves applying solid, porous insulation materials to the exterior of equipment, containers, and pipelines. These materials contain air or other gases under atmospheric pressure within their voids.

(2) There are three basic types of vacuum insulation: high vacuum insulation, vacuum powder insulation, and vacuum multilayer insulation.

Principles of Pressure Increase and Decrease in LNG Tanks

Boost Pressure:

As LNG usage continues, the liquid level inside the tank decreases, the gas phase space increases, causing the tank pressure to continually drop. The flow rate of LNG gradually slows until it stops. Therefore, during normal operations, it is necessary to continuously replenish gas into the tank to maintain the pressure within a certain range. This process is called pressurization. As shown in the diagram, the pressurization of the tank is achieved by an automatic pressurization system consisting of an automatic pressure regulator and a small air-temperature vaporizer. When the tank pressure falls below the set value of the automatic pressurizer, the regulator opens, and the liquid inside the tank slowly flows into the pressurization vaporizer due to the liquid level difference. The gas produced by the vaporization of the liquid flows through the regulator and the gas phase pipe to replenish the tank. The continuous addition of gas raises the tank pressure, and when it reaches above the regulator's set value, the regulator closes. At this point, the pressure inside the pressurization vaporizer will prevent further liquid inflow, and the pressurization process ends.

Pressure Relief: (Overpressure Protection)

LNG slowly evaporates during storage due to heat loss from the storage tank's environment, causing the tank pressure to gradually increase and ultimately posing a safety risk. Therefore, it is necessary to control the pressure limit by releasing the gas inside the tank. This is done by installing a regulator on the gas phase pipeline of the storage tank. When the tank pressure reaches the set value, the pressure relief valve slowly opens to release the tank gas. Once the pressure drops below the set value, the automatic regulator closes. It should be noted that the regulator referred to here is not the commonly used gas regulator. Most regulators rely on the action of the control valve at the outlet end, while this regulator operates based on the pressure control valve at the inlet end, similar to the commonly used vent valve. Additionally, it must withstand low temperatures. The released gas is generally not released into the atmosphere; it is instead recovered and reused in subsequent processes. This portion of the gas is abbreviated as BOG.

Heze LNG Storage Tank, Low Temperature Oxygen/Nitrogen/Argon Carbon Dioxide Storage Tank, 60 Cubic Meters LNG Storage Tank