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Natural gas is one of the world's cleanest fuels at atmospheric pressure boiling point of -161 ℃, the volume of gas volume under standard conditions of 1/600. the best way to storage and transport is Liquefied natural gas (LNG) , undoubtedly ,they need for a quality, superior performance pressure storage containers, LNG storage tank is such a specialized equipment to meet under normal conditions of storage and liquefied natural gas far distance transport.
Purpose:
LNG storage tank is the storage and transportation of natural gas, as a form conducive to their widespread use in remote recovery and storage of natural gas, is conducive to long-distance transportation of natural gas, is conducive to the use of natural gas peaking and develop new markets, and expanded use of natural gas in the form . It can be widely used in LNG gasification station, LNG peaking stations, LNG liquefaction plant filling stations and other places.
Structure:
LNG storage operating structure type with a single containment tanks, double containment tanks and full containment tanks and so on. Here we introduce each of its main structures:
Single containment tank outer tank is made of carbon steel, it can not withstand the cold LNG, general layout requires a larger safety distances and geographical area, and the need to set the fire protection embankment. Single containment tank design pressure is low, unloading gas return need to set up fan. But the single containment tank investment is relatively low. Because of its safety relative to other forms of cans low , in recent years has been less used in the production of plants and receiving stations.
Double containment tanks with low temperature resistant metallic material or concrete outer tank, the inner cylinder leakage occurs, the gas leakage will occur, but the liquid does not leak, its security is higher than single containment tank . Generally do not need to set fire dike, but still larger safety distance. The design pressure is the same as with the single containment tank, need to set up return air blowers, cost about 1.1 times the single containment tank.
Full containment tank structure using 9% nickel steel inner cylinder, 9% nickel steel or concrete outer tube and cover. Inner tube outer cylinder can withstand LNG and gas leak, do not leak, so security is easier.
Benefits:
1, has good low temperature resistance.
2, the product of high security, LNG storage tanks with double wall structure, the use of letters stopped philosophy, tank leaks in the first layer, the second layer of the tank can leak fluid and vapor achieve complete closure Elam, to ensure safe storage .
3, product manufacturing overall selection special. 9Ni inner tank wall is generally used steel or aluminum and other materials, the outer tank wall is prestressed concrete.
4, high-quality insulation measures. Full overcome the LNG storage tank temperature up to 200 ℃ external negative factors.