Liquefied gas grading purification device

Abstract

The invention discloses a liquefied gas graded purification device, and belongs to the technical field of gas purification. The device comprises a purification tank, wherein a raw material tank is arranged on one side of the purification tank, a liquefaction tank is arranged on the other side of the purification tank, the raw material tank and the liquefaction tank are both cooled through a cooling device, the raw material tank is connected with the purification tank through a first connecting pipe, the liquidation tank is connected with the purification tank through a first connecting pipe, the top ends of the raw material tank, and the purification tank and the liquidation tank are all provided with vacuumizing devices. According to the invention, the placed raw material tank and liquidation tank can extrude a supporting corrugated pipe, so that extruded gas is conveyed into a communicating cavity through a gas conveying hose; a sealing plate is pushed by gas to slide in a containing groove and a limiting groove, and slides out of the limiting groove under the pushing action of the gas so as to seal a gap between a cooling barrel and the raw material tank and a gap between the cooling barrel and the liquidation tank, so that the refrigeration effect of liquid nitrogen is better, and the liquefying and purifying effects of the gas are better.

Description

technical field [0001] The invention relates to the technical field of gas purification, in particular to a liquefied gas classification purification device. Background technique [0002] During the transportation of gas, due to the large volume of the gas, it will occupy a large volume during the transportation of the gas, and the transportation efficiency is low. Therefore, the liquefaction and purification of the gas can greatly improve the efficiency of gas transportation, and at the same time , improve the purity of the gas, but when the existing gas liquefaction and purification equipment is used to liquefy and purify the gas, it usually purifies the gas raw material containing impurities through the purification equipment, and then uses low temperature to liquefy the purified gas, but , the existing purification device has the following problems in use: [0003] 1. Commonly used gas cooling methods usually use liquid nitrogen to cool down. When the raw material tank ...

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Problems solved by technology

[0002] During the transportation of gas, due to the large volume of the gas, it will occupy a large volume during the transportation of the gas, and the transportation efficiency is low. Therefore, the liquefaction and purification of the gas can greatly improve the efficiency of gas transportation, and at the same time , improve the purity of the gas, but when the existing gas liquefaction and purification equipment is used to liquefy and purify the gas, it usually purifies the gas raw material containing impurities through the purification equipment, and then uses low temperature to liquefy the purified gas, but , the existing purification device has the following problems in use:

[0003] 1. Commonly used gas cooling methods usually use liquid nitrogen to cool down. When the raw material tank and liquefaction tank are placed in liquid nitrogen, on the one hand, the placed raw material tank and liquefaction tank will shake and become unstable. On the other hand, In order to facilitate the placement of raw material tanks and liquefaction tanks, the sealing performance of liquid nitrogen will be reduced and the liquefaction effect will be affected;

[0004] 2. When vacuuming the raw material tanks, liquefaction tanks and purification tanks, vacuum pumps are usually used for vacuum pumping. This method will cause the vacuum pumps to start and stop frequently, affecting the service life of the vacuum pumps. Moreover, after purification The impurity gas cannot be handled well;

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