Liquefied natural gas storage and conveying tank

Abstract

The invention discloses a liquefied natural gas storage and conveying tank. A hollow interlayer is arranged between an inner tank and an outer tank. The inner tank comprises a liquid-phase inner tank body and a gas-phase inner tank body, wherein a liquid-phase pressure sensor is arranged in the liquid-phase inner tank body; a gas-phase pressure sensor is arranged in the gas-phase inner tank body; the gas-phase inner tank body is connected with the liquid-phase inner tank body; the gas-phase pressure sensor is connected with a first safety valve; the gas-phase inner tank body is provided with a gas-phase pumping-out opening; the liquid-phase inner tank body is provided with a liquid-phase pumping-out body; the gas-phase pumping-out opening is connected with a gas-phase inner tank body pumping-out valve; the liquid-phase pumping-out opening is connected with a liquid-phase inner tank body pumping-out valve; the gas-phase inner tank body pumping-out valve is connected with the liquid-phase inner tank body pumping-out valve through a fourth pipeline; a heat insulating layer is arranged outside the liquid-phase inner tank body; an anti-collision plate is arranged in the hollow interlayer; the liquid-phase inner tank body is provided with a liquid-phase inner tank body gas filling opening which is connected with a gas filling pipeline through a liquid-phase inner tank body gas filling valve; the gas filling pipeline is provided with a second safety valve; the liquid-phase pressure sensor is connected with the second safety valve; a reinforcement ring is arranged outside the outer tank, and the outer tank is provided with an anti-explosion device. The liquefied natural gas storage and conveying tank effectively reduces external force collision, is low in cost and is long in service life.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a liquid natural gas storage and transportation tank. Background technique [0002] LNG (Liquefied Natural Gas), the English abbreviation for liquefied natural gas. Natural gas is a combustible gas that is naturally extracted from gas fields, and its main component is methane. LNG is condensed into a liquid by cooling gaseous natural gas at normal pressure to -162°C. Natural gas liquefaction can greatly save storage and transportation space, and has the characteristics of large calorific value and high performance. [0003] LNG is a clean and efficient energy source. Importing LNG helps energy consuming countries diversify energy supply and ensure energy security, while exporting LNG helps natural gas producing countries effectively develop natural gas resources, increase foreign exchange income, and promote national economic development, so LNG trade is becomin...

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