Hekou Group 60 cubic meter LNG storage tank price
60-cubic-meter LNG storage tank is a low-temperature insulated tank in vacuum powder insulation type. Its structure consists of an inner container and an outer container forming a double-container design. The material used is austenitic stainless steel. The outer container material varies depending on the user's region, with options of Q235-B or 16MnR. The space between the inner and outer containers is filled with insulation material, pearlite sand, and then vacuumed. Insulation material is chosen by filling the space with pearlite sand in a heated state and then vacuuming it.
60-cubic-meter LNG Storage Tank - Application Scope for Liquefied Natural Gas Storage
Our products are suitable for industries such as steel, metallurgy, construction, chemicals, pharmaceuticals, food, glass, civil, and medical, while reducing gas consumption costs. They are the preferred liquid gas storage containers across various industries.
Features of Liquefied Natural Gas Tanks
1. Liquefied Natural Gas Tank Models: Vertical and Horizontal
2. Tank Effective Volume: 2m3-100m3 (common volumes include 2m3, 3m3, 5m3, 10m3, 15m3, 20m3, 30m3, 50m3, 100m3) and can be custom-designed according to customer specifications.
3. Working Pressure: ≥0.2 MPa (common pressures include 0.8 MPa, 1.6 MPa)
4. Storage Media: Liquid Oxygen (LOX), Liquid Nitrogen (LIN), Liquid Argon (LAr), Liquid Carbon Dioxide (LCO2), Liquefied Natural Gas (LNG), etc.
Design Pressure: 0.84 Mpa, 1.68 Mpa; Working Pressure: 0.8 Mpa, 1.6 Mpa
High impact resistance and strong shock absorption.
60-cubic-meter LNG Storage Tank - Development of Liquefied Natural Gas Storage Tanks
With the development of the gas industry and the natural gas industry, the application of liquefied natural gas (LNG) storage tanks has become increasingly widespread. In addition to large and extra-large horizontal low-temperature storage tanks for large LNG facilities and LNG receiving stations, air separation units, small and medium-sized LNG facilities, LNG storage and distribution stations, and LNG liquefaction stations generally utilize small and medium-sized horizontal low-temperature storage tanks, with capacities typically below 10,000 m³. As the core equipment of such facilities, the selection of the tank type significantly impacts the overall cost and operation expenses. Choosing the appropriate type of horizontal low-temperature storage tank to meet the installation requirements has become particularly important.
30, 60, 100 cubic meter LNG storage tanks, LNG gasification station process flow
As shown in the figure, LNG is transported to the LNG satellite station via low-temperature truck tanks. It is pressurized in the truck tank using a horizontal dedicated unloading booster at the unloading platform, and then delivered to the satellite station's low-temperature LNG storage tank via pressure difference. Under operating conditions, the storage tank booster increases the pressure of the LNG inside the tank to 0.6 MPa. The pressurized low-temperature LNG enters an air-cooled gasifier, where it is converted into gaseous natural gas after heat exchange with air and its temperature is raised. The outlet temperature is 10°C lower than the ambient temperature, with a pressure of 0.45-0.60 MPa. If the temperature of the natural gas at the outlet of the air-cooled gasifier does not reach above 5°C, it is heated using a water bath heater. Finally, after pressure regulation (regulator outlet pressure of 0.35 MPa), metering, and odorization, it enters the city's transmission and distribution network, supplied to various users.
1. Unloading Process
LNG is transported to the city's LNG gasification station from the LNG liquefaction plant via road tankers or tank container trucks. The tanker's empty-temperature pressure vaporizer is used to increase the pressure in the tanker's storage tank (or through an onboard unloading pressure vaporizer for tank container trucks), creating a pressure difference between the tanker and the LNG storage tank. This pressure difference is then utilized to discharge the LNG from the tanker into the station's storage tank. At the end of unloading, the gaseous natural gas in the tanker is recovered through the gas phase pipeline on the unloading platform.
During unloading, to prevent an increase in pressure inside the LNG storage tank that could affect unloading speed, an upward feeding method is used when the LNG temperature in the tank car is lower than that in the storage tank. The low-temperature LNG in the tank car is sprayed into the storage tank through the upward feeding nozzle of the storage tank, cooling part of the gas to a liquid state and reducing the tank pressure, allowing for smooth unloading. If the LNG temperature in the tank car is higher than that in the storage tank, a downward feeding method is employed, with the high-temperature LNG entering the storage tank from the bottom feeding port, mixing with the low-temperature LNG inside to cool down and prevent the high-temperature LNG from evaporating through the upward feeding port, which could increase the tank pressure and complicate unloading. In practice, due to the long distance from the LNG gas source to the cities consuming the gas, the LNG temperature in the tank car upon arrival at the consuming city is typically higher than that in the storage tank at the gasification station, necessitating the use of the downward feeding method. Therefore, except for the first time of filling the LNG, the downward feeding method is generally used during normal unloading procedures.
To prevent significant temperature difference stress from causing damage to the pipeline or affecting unloading speed during unloading, the unloading pipeline should be pre-cooled with LNG from the storage tank before each unloading. At the same time, rapid opening or closing of valves should be avoided to prevent sudden changes in LNG flow rate, which may lead to liquid impact damage to the pipeline.
2. Storage Tank Pressure Boosting Technology
Driven by pressure, LNG flows from the storage tank to the atmospheric vaporizer, where it vaporizes into gaseous natural gas for customer use. As LNG is depleted from the tank, the internal pressure continuously drops, and the outflow rate of LNG gradually slows down until it stops. Therefore, in normal gas supply operations, it is necessary to continuously replenish the tank with gas to maintain the pressure within a certain range, ensuring the continuous vaporization process of LNG. The pressure boosting of the tank is achieved using an automatic pressure booster valve and an auto-boost atmospheric vaporizer. When the pressure inside the tank falls below the set opening value of the automatic pressure booster valve, the valve opens, and the LNG inside the tank flows into the auto-boost atmospheric vaporizer due to the liquid level difference (the installation height of the auto-boost atmospheric vaporizer should be below the lowest liquid level of the tank), where the LNG vaporizes into gaseous natural gas by exchanging heat with the air. The gaseous natural gas then flows back into the tank, raising the pressure inside to the required operating pressure.
3. LNG Gasification Process
LNG undergoes heat exchange with the atmosphere in a vacuum-type gasifier, transitioning from liquid to gas. By the time it exits, it's 10℃ cooler than the ambient temperature. If it falls below 5℃, it's heated by a water-bath gasifier. The hot water for the water-bath gasifier comes from the water circulation of a hot water boiler.
4. Safety Discharge Process for Gases
LNG is a liquid mixture primarily composed of methane, with a boiling point of -161.5°C at atmospheric pressure and a storage temperature of -162.3°C under atmospheric conditions. Its density is approximately 430 kg/m³. When LNG vaporizes into gaseous natural gas, its critical buoyancy temperature is -107°C. At temperatures above -107°C, the gaseous natural gas is lighter than air and will rise and drift away from the leak source. At temperatures below -107°C, the gaseous natural gas is heavier than air, and the cold gaseous natural gas will accumulate downward, forming a flammable explosive mixture with air. To prevent the accumulation of low-temperature gaseous natural gas, which could form an explosive mixture, a single air-temperature safety vent gas heater is installed. The vent gas is first heated by this heater to reduce its density below that of air, and then released into the atmosphere.
For LNG liquefaction plants in southern areas without EAG heating devices, to prevent operators from being injured by the cold liquid-gas mixture released after the safety valve trips, the individual safety valve vent pipes and the storage tank vent pipes should be connected to the centralized vent main pipe for venting.
