Description
With the upgrading of chemical plant safety and the implementation of new national standards, the safety requirements of LNG storage tank are more and more strict. In the past, the land occupation area of LNG single tank structure increased sharply, which reduced the utilization rate of land and increased the investment cost of owners.
In order to reduce the utilization rate of land and enhance the safety of storage tanks, the volume of a single tank in the liquefaction and peak shaving project is 5000-50000m ³ Between LNG tanks, our company designs bimetal full tank structure. The structure conforms to the national standard, saves land cost, and the investment cost and construction period are at least half less than that of concrete full capacity tank. At present, the structure has been put into use and runs well.
Introduce
Main structure type
Vertical, cylindrical, bimetal, inner ceiling, outer vault, high heat angle protection.
The interlayer is made of pearlescent sand, elastic felt and foam glass brick.
Process system
01. Feed system (top feed + bottom feed)
02. Discharge system (built in submersible pump)
03. Backflow after pump
04. Invigorating Qi
05. Bog recovery
06. Pressure safety system
07. I & C (temperature, liquid level, pressure, density, analysis) system
08. Fire protection system
Main structure
Bimetallic full tank adopts hot angle protection, which is composed of main vessel and secondary vessel.
The main container adopts vertical flat bottom cylinder ceiling structure, the main container adopts s30408 material for storing LNG liquid, and the ceiling adopts aluminum alloy and insulation cotton structure. The secondary container is a composite structure with thermal angle protection. 16MnDR outer shell, foam glass brick and S30408 intermediate container are used from outside to inside.
The shell adopts vertical cylinder vault self-supporting structure, and the shell adopts 16MnDR to store bog gas; The intermediate container and foam glass brick form a thermal angle protection system. When the container leaks, the hot angle protection system can store all the LNG liquid. At the same time, because of the existence of foam glass bricks, the heat transfer between the LNG liquid and the outside is greatly weakened, which ensures that the shell body is protected from low-temperature impact and ensures that the LNG liquid after leakage can be evaporated orderly and controlled. Avoid overpressure caused by rapid gasification.
Case
News
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