Refrigeration and separation tank for producing liquefied natural gas

Abstract

The invention discloses a refrigeration and separation tank for producing liquefied natural gas. The refrigeration and separation tank is a cylindrical shell body, wherein a sealed cylindrical separation groove is formed in the middle of the shell body; a rotary shaft, which is horizontally mounted, is arranged in the separation groove; the rotary shaft is provided with a plurality of spherical liquid filtering screen meshes; the diameter of the liquid filtering screen meshes is the same as the inner diameter of the separation groove; a feeding hole is formed in the shell body at one side of the separation groove and a rotary motor is arranged on the shell body at the other side of the separation groove; the rotary motor is connected onto the rotary shaft; a gas outlet is formed in the top of the separation groove in one side of the rotary motor; a liquid discharging opening is formed in the bottom of the separation groove; a tank body exhausting opening is formed in the top of the shell body; a tank body liquid discharging opening is formed in the bottom of the shell body; the liquid discharging opening is provided with an electromagnetic control valve. The refrigeration and separation tank is improved and a gas product which only contains less liquid and is generated in a liquefied natural gas production process is treated; the device has the advantages of simple structure, convenience for operation, accuracy in controlling and good gas-liquid separation effect and is convenient for subsequent production of the liquefied natural gas.

Description

technical field [0001] The invention relates to the field of production equipment of liquefied natural gas, in particular to a refrigeration separation tank used for the production of liquefied natural gas. Background technique [0002] For the production process of liquefied natural gas, it needs to undergo multiple operations such as heat exchange and compression. After the heat exchanger is operated; under the environment of low temperature and high pressure, the discharged products include gas and partially cooled liquid. During several heat exchange operations, the gas component accounts for the majority, and the liquid only has a small part, and the liquid will be mixed with the gas and enter the subsequent device; therefore, in this process, a separation tank is generally used to separate it . [0003] However, in actual operation, when the product contains a large amount of liquid, it is easier to separate gas and liquid; when the product contains only a small amoun...

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Problems solved by technology

[0003] However, in actual operation, when the product contains a large amount of liquid, it is easier to separate gas and liquid; when the product contains only a small amount of liquid and most of it is gas, it is difficult for the traditional separation tank to separate most of the gas. The liquid is retained, and the liquid enters the circulation system with the air flow, and performs heat exchange and compression operations again, which not only wastes energy, but also has a certain loss on subsequent equipment, which affects the service life of subsequent devices

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