Cold insulation design of LNG storage tank, factory price of horizontal 30 cubic low-temperature storage tank

Description :

　　The purpose of LNG storage tank cold insulation design is to meet the requirements of process production, maintain and maximize production capacity, reduce cold loss, save energy, prevent condensation on the outer wall surface of the storage tank, and improve the working environment.low-temperature storage tankThe insulation structure for storing low-temperature liquids should first consider the insulation properties, and different structures and insulation materials should be used according to different storage conditions.

　　For the insulation design of the top of the storage tank, as the insulation material covers the inner tank ceiling, it does not need to bear the pressure of equipment and evaporated gas (only the weight of the insulation material itself). The insulation material should have the characteristics of low thermal conductivity and low density. The upper part of the top of the low-temperature natural gas storage tank is made of glass wool, with a cold insulation thickness of 500mm. It is laid and installed in 5 layers, with aluminum foil on the outer side of the upper layer of glass wool to prevent expanded perlite or other impurities from entering the inner tank through gaps.

　　Expanded perlite is chosen as the insulation material for the inner and outer wall interlayers, while expanded perlite is used for the side wall insulation. After cooling the storage tank filled with low-temperature liquid, the contraction of the inner tank will result in insufficient expanded perlite filling in the upper and edge areas of the tank's side walls, and the low-temperature storage tank cannot be filled with expanded perlite again after pre cooling. To prevent the entry of humid air, a layer of elastic insulation glass fiber felt is added to the outer wall of the storage tank to avoid secondary filling of perlite and reduce the pressure of perlite on the inner tank wall.

　　The design of cold insulation materials and structures at the bottom of liquefied natural gas storage tanks should not only ensure that the cold loss of the tank is minimized, but also that the compressive strength of the insulation materials can withstand the total weight and gas-phase pressure of the inner tank and low-temperature liquid. In the design and construction of a 20000m3 low-temperature storage tank, the bottom insulation structure is divided into two parts: a pressure bearing ring and a central ring, and different insulation materials are used based on the different pressures borne by various parts of the tank bottom and the principle of minimizing cold loss rate. The pressure bearing ring is the main component that bears the weight of the inner tank, and its strength requirements are relatively high. Therefore, a composite structure of concrete and glass bricks is used as the cold insulation material for the pressure bearing ring. For the bottom center part, using glass bricks alone can meet its strength and cold insulation design requirements.

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• Cold insulation design of LNG storage tanks