At present, the LNG cryogenic storage tanks commonly used at home and abroad have three methods: atmospheric storage, pressure storage of mother and child tanks and pressure storage of vacuum tanks. Which storage method is used depends mainly on the size of the storage.
Isometric LNG ship, referred to as “LNG ship” for short. Refers to a “ship” that specializes in transporting liquefied natural gas. The earliest LNG ship was the 5,100-square-meter “Methane Light Duo” built in the United States in 1958 using ordinary old oil tankers. According to the structure of the cargo tank, it can be divided into independent storage tank type and membrane type. The former is to put cylindrical, tank, spherical and other storage tanks in the ship; the latter adopts a double shell structure, the inner shell is the load-bearing shell of the cargo tank. Compared with the independent type, the membrane type has the advantage of high volume utilization The structure is light in weight, so newly built LNG ships, especially large ones, mostly adopt membrane structure. Liquefied natural gas ships have complex equipment, high technical requirements and high cost.
The LNG receiving station is an organic whole composed of many related equipment assemblies. Only by mutual cooperation of these equipments can the LNG transported by sea be stored in the LNG storage tank through a certain process and then be exported to users. These equipment include discharge arm, storage tank, low-pressure delivery pump, high-pressure delivery pump, carburetor, BOG compressor, flare tower, etc.
In recent decades, gas-fired power generation has become the main driving force for the development of the natural gas industry. As improved fuel conversion efficiency and methods are conducive to improving the environment, natural gas has therefore become the first choice for fuel conversion in new power plants and existing fuel and coal-fired power plants. However, due to concerns about higher natural gas prices and the availability of sufficient natural gas, governments and power producers in many countries have to reconsider plans for new gas-fired power generation capacity. A large amount of investment is currently underway to study clean coal technology, which will increase the competitiveness of coal. In addition, nuclear power has regained importance and poses a threat to gas-fired power generation.
The isometric LNG terminal is the LNG Terminal in English, and the LNG terminal in Chinese. It refers to a device that stores LNG and then transports it outside. LNG receiving stations include LNG terminals and LNG storage tanks. The implementation of LNG cold energy utilization can reduce cold pollution and improve the comprehensive energy utilization level. The field of LNG cold energy utilization is very wide: according to the sending conditions of natural gas, a gas turbine or expansion method can be used to generate electricity using LNG cold energy; it can be received at LNG Build a low-temperature cold storage next to the station, use LNG cold energy to freeze food; You can also use LNG cold energy to dry and crush at low temperature, used in medicine and food industry; Use LNG cold energy to liquefy carbon dioxide, apply in welding, fire fighting, frozen food, etc .; also LNG cold energy can be used to separate air to produce liquid nitrogen, liquid oxygen and liquid argon.
Liquefied Natural Gas （LNG）, whose main component is methane, is recognized as the cleanest fossil energy on earth. It is colorless, odorless, non-toxic and non-corrosive, its volume is about 1/625 of the volume of the same amount of gaseous natural gas, and the mass of liquefied natural gas is only about 45% of the same volume of water.