Natural gas liquefaction, storage and output device

Abstract

The invention discloses a natural gas liquefaction, storage and output device, relates to the technical field of natural gas, and solves the problems that liquefied natural gas in a storage tank is not thoroughly used, and much unnecessary waste is caused. When natural gas is used, a large amount of condensate water is generated, and an existing natural gas output device does not treat the condensate water. According to the natural gas liquefaction, storage and output device, the vaporization output device is arranged, the three-way valve is used for connecting the gas conveying pipeline, the overflow pipeline and the mixing pipeline, the three-way valve is rotated, the mixing pipeline is controlled to be communicated with the gas conveying pipeline or the overflow pipeline, and the three-way valve is connected with the plugging block; the functions of liquefied storage and vaporized output are switched, use is convenient, and the structure is compact; the overflow pipeline is connected with the heat exchanger, vaporized natural gas can be cooled to be liquefied and reinjected into the inner tank, the pressure intensity in the inner tank is prevented from changing, and the storage safety is improved.

Description

technical field [0001] The invention relates to the technical field of natural gas, in particular to a natural gas liquefaction storage and output device. Background technique [0002] LNG is liquefied natural gas, which is a natural gas that is liquid under normal pressure after a series of ultra-low temperature liquefaction after purifying the natural gas produced in the gas field. It is recognized as the cleanest fossil energy on earth. The cooling device for liquefied natural gas storage tank is a device for cooling the storage tank during the storage process of liquefied natural gas, which has been widely used in the field of energy storage; the existing one is used for liquefaction In the use of the cooling device of the natural gas storage tank, it is found that the temperature difference between the inside and outside of the storage tank is large, which increases the failure rate of the storage tank, affects the storage state of LNG, and reduces the storage safety of...

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Problems solved by technology

[0004] Although this application solves the problems in the background technology to a certain extent, there are the following problems in this application: 1. The overall device is bulky and difficult to move. After the liquefied natural gas in the storage tank is partially vaporized, it cannot be processed, causing the tank Internal pressure changes; 2. It is inconvenient to use the liquefied natural gas in the storage tank, and when the storage tank for liquefied natural gas is stopped, the use of the liquefied natural gas in the storage tank is not thorough enough, causing a lot of unnecessary waste; 3. Using natural gas When , a large amount of condensed water will be generated, and the existing natural gas output device does not treat the condensed water

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