Babjehec Liquefied Natural Gas Storage Tank, Shandong Hezhou Boiler Co., Ltd.
Hekou Group 60 cubic meter LNG storage tank price
60-cubic-meter LNG storage tank is a low-temperature insulated tank of vacuum powder insulation type. The structure consists of an inner container and an outer container forming a double-layered container. The material selected is Austenitic stainless steel, with the outer container material chosen as Q235-B or 16MnR based on the user's location. The space between the inner and outer containers is filled with insulation material pumice and vacuumed. The insulation material is filled with pumice in a heated state and vacuumed.
60-cubic-meter LNG Storage Tank - Application Range for Liquefied Natural Gas Storage
Our products are suitable for industries such as steel, metallurgy, construction, chemicals, pharmaceuticals, food, glass, civil, and medical, and help reduce gas consumption costs. They are the preferred liquid gas storage containers across various industries.
Product 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 customized 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; Operating Pressure: 0.8 Mpa, 1.6 Mpa
6. High impact resistance and strong vibration performance.
60-cubic-meter LNG storage tank development
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-scale LNG facilities and LNG receiving terminals, which are equipped with large and extra-large horizontal low-temperature storage tanks, air separation units, small and medium-sized LNG facilities, LNG storage and distribution stations, and LNG gasification stations generally use small and medium-sized horizontal low-temperature storage tanks, with capacities typically below 10,000 cubic meters. As the core equipment of these facilities, the choice of tank type significantly affects the overall cost and operational expenses of the system. Selecting the appropriate type of horizontal low-temperature storage tank to meet the installation requirements is therefore of paramount importance.
Liquefied Natural Gas (LNG) Storage Vessel Capacity and Applicable Scenarios
1. 60-cubic-meter LNG vacuum powder-insulated storage tanks, available in sizes from 5 to 200 cubic meters. Suitable for civil gasification stations, industrial gasification stations, LNG refueling stations, small skid-mounted liquefaction units, and refrigerant storage.
2. Horizontal sub-super type low-temperature storage tanks, ranging from 300 to 5,000 cubic meters, suitable for small liquefaction units, air separation units, civil gasification stations, industrial gasification stations, and LNG gasification stations, etc.
3. Horizontal and Lying Low-Temperature Storage Tanks, 100 to 10,000 cubic meters, suitable for small and medium-sized liquefaction units, peak-shaving liquefaction units, air separation units, LNG storage and distribution stations, LNG gasification stations, etc.
4. Vertical flat-bottomed cylindrical storage tanks, ranging from 200 to 200,000 cubic meters, suitable for various liquefaction units, LNG storage and distribution stations, LNG regasification stations, air separation units, liquid hydrocarbon storage, and coastal LNG receiving stations.
Vacuum powder insulation storage tanks are composed of an inner cylinder and an outer cylinder, with the annular space insulated using vacuum powder insulation technology. Due to transportation constraints, the maximum tank capacity is currently 200 m³, and they are commonly used for storing smaller quantities of liquid.
When the liquid storage capacity exceeds 200 m³, a 60-cubic-meter LNG storage tank can be connected in parallel as a cluster tank using multiple vacuum powder insulation storage tanks. When the storage capacity exceeds 1500 m³, it is advisable to use a horizontal sub-parent storage tank (abbreviated as sub-parent tank), which has the advantages of fewer site equipment, lower investment, convenient operation and maintenance, and safety reliability compared to the cluster tank. The sub-parent tank consists of multiple (more than 3) sub-tanks in parallel to form the inner tank, and a large outer tank (parent tank) is assembled. The sub-parent tank is also limited by transportation and lifting conditions, with a maximum single tank capacity of 250 m³ and a total maximum capacity of 5000 m³. When the storage capacity exceeds 200 m³, spherical horizontal low-temperature storage tanks and vertical flat-bottomed cylindrical horizontal low-temperature storage tanks can also be chosen. When the storage capacity exceeds 10,000 m³, horizontal flat-bottomed cylindrical low-temperature storage tanks are often used. In the actual selection process, when the storage capacity is less than or equal to 200 m³, a vacuum powder insulation storage tank with mature manufacturing and installation technology is chosen for the 60-cubic-meter LNG storage tank.
30, 60, 100 cubic LNG storage tanks LNG gasification plant process flow
As shown in the figure, LNG is transported to the LNG satellite station via low-temperature tank trucks. It is pressurized in the tank trucks using horizontal dedicated卸车增压器 at the unloading platform, and then conveyed to the satellite station's low-temperature LNG storage tanks by pressure difference. Under operating conditions, the storage tank booster pressurizes the LNG inside the tank to 0.6 MPa. The pressurized low-temperature LNG enters an air-cooled gasifier, where it is heated by exchanging heat with air and converted into gaseous natural gas, increasing its temperature. The outlet temperature is 10°C below the ambient temperature, with a pressure of 0.45-0.60 MPa. If the gas temperature at the air-cooled gasifier outlet does not reach above 5°C, it is heated using a water bath heater. Finally, after pressure regulation (regulator outlet pressure is 0.35 MPa), metering, and odorization, it is fed into the city's transmission and distribution network for delivery to various users.
1. Unloading Process
LNG is transported to the gasification station in cities using gas through highway tanker trucks or tank container vehicles from the LNG liquefaction plant. The empty-temperature type pressure-increasing gasifiers on the tanker trucks are used to increase the pressure in the tanker storage (or through the pressure-increasing gasifiers set up within the station for tank container vehicles), creating a pressure difference between the tanker trucks and the LNG storage tanks. This pressure difference is then utilized to unload the LNG from the tanker trucks into the storage tanks at the gasification station. Upon completion of the unloading, the gas phase natural gas from the tanker trucks is recovered through the vapor phase pipeline at the unloading platform.
During unloading, to prevent the increase in pressure within the LNG storage tank from affecting unloading speed, the upward feeding method is used when the LNG temperature in the tanker is lower than that in the tank. The low-temperature LNG in the tanker is sprayed into the tank through the upward feeding pipe nozzle in a spray state, cooling part of the gas to a liquid and reducing the tank pressure, allowing for smooth unloading. If the LNG temperature in the tanker is higher than that in the tank, the downward feeding method is employed, with the high-temperature LNG entering the tank from the bottom feeding opening, mixing with the low-temperature LNG inside to cool down, preventing the high-temperature LNG from evaporating through the upward feeding opening and increasing the tank pressure, which would make unloading difficult. In actual operations, due to the relatively long distance from the LNG gas source to the consuming cities, the LNG temperature inside the tanker is usually higher than that in the storage tank of the gasification station upon arrival at the consuming city, necessitating the use of the downward feeding method. Therefore, except for the initial LNG filling, the downward feeding method is predominantly used during normal tanker unloading.
To prevent significant temperature difference stress caused by rapid cooling during unloading, which may damage the pipeline or affect unloading speed, the unloading pipeline should be pre-cooled with LNG from the storage tank prior to each unloading. Additionally, it should be avoided to rapidly open or close valves, as this can cause sudden changes in LNG flow rate, leading to liquid impact damage to the pipeline.
2. Storage Tank Pressure Boosting Technology
Driven by pressure, LNG flows from the storage tank to the regasifier, where it is vaporized into natural gas and supplied to customers. As LNG exits the tank, the internal pressure decreases, and the outflow rate of LNG gradually slows 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 increase of the tank is achieved using an automatic pressure boosting valve and an auto-pressurizing regasifier. When the tank pressure falls below the set opening value of the automatic pressure boosting valve, the valve opens, and the LNG in the tank flows into the auto-pressurizing regasifier (the installation height of the auto-pressurizing regasifier should be below the lowest liquid level of the tank) due to the liquid level difference. In the auto-pressurizing regasifier, the LNG vaporizes into natural gas by heat exchange with air, which then flows back into the tank, increasing the tank pressure to the required operating level.
3. LNG Gasification Technology
LNG undergoes heat exchange with the atmosphere in a vacuum gasifier, transitioning from liquid to gas. At the outlet, it is 10°C cooler than the ambient temperature. If it falls below 5°C, it is 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 Release 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, with a density of approximately 430 kg/m³. When LNG vaporizes into gaseous natural gas, its critical buoyancy temperature is -107°C. If the temperature of the gaseous natural gas exceeds -107°C, it becomes lighter than air and will rise and drift away from the leak source. When the temperature of the gaseous natural gas is below -107°C, it becomes heavier than air, and the低温 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 1-unit 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 before being released into the atmosphere.
For LNG regasification stations in the south without EAG heating equipment, to prevent cold burn injuries to operators due to the release of low-temperature LNG gas-liquid mixture from the safety valve, the single safety valve vent pipe and the storage tank vent pipe should be connected to the central vent main pipe for venting.
