Product Description

Brand Huoguo Group Model CFW-60/0.8

Material: Stainless Steel, Diameter: 2916mm

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

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

Origin: Shandong Heze

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

Low-temperature LNG storage tanks are high-vacuum insulated stainless steel pressure vessels designed for storing, transporting, and using liquid natural gas. The containers are manufactured according to GB18442 standards, suitable for reliable and cost-effective transportation and storage of low-temperature liquids, as well as on-site storage and supply of low-temperature liquid gases across a wide range of applications.

With the development of low-temperature liquid storage and transportation, the insulation technology of low-temperature containers is becoming increasingly sophisticated. To maintain the storage and transportation of low-temperature liquids and the temperature of low-temperature refrigeration, insulation measures must be taken in low-temperature environments. It is only under insulated conditions that low temperatures can be maintained. Insulation can reduce vaporization loss, or create conditions for the long-distance transportation of low-temperature liquids.

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

(1) Standard insulation is an older, traditional method that involves applying solid, porous insulating materials to the outer sides of equipment, containers, and pipes. These materials are filled with 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 Storage Tanks

Boost Pressure:

As LNG is used, the liquid level inside the tank continuously decreases, causing the gas phase space to expand and the tank pressure to drop. The flow rate of LNG gradually slows down until it stops. Therefore, during normal operation, 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 autonomous pressurization 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 replenishment of gas raises the tank pressure, and when it exceeds the regulator's set value, the regulator closes. At this point, the pressure inside the pressurization vaporizer prevents 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's pressure to gradually increase and ultimately posing a risk to the tank's safety. 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's pressure rises to the set value, the pressure relief valve slowly opens to release the tank's 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, but this regulator operates based on the 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; instead, subsequent processes will recover and utilize it. 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