Pressure-sharing structure of double-tower-type gas separation equipment

Abstract

The invention provides a pressure-sharing structure of double-tower-type gas separation equipment. The pressure-sharing structure of the double-tower-type gas separation equipment solves the problems that a top-top pressure-sharing and bottom-bottom pressure-sharing mode is adopted at present, and finish product gas manufactured by equipment is low in concentration and yield. The pressure-sharing structure of the double-tower-type gas separation equipment comprises two adsorbing towers, and is characterized in that a gas flow outlet is formed at the upper end of a tower body of each adsorbing tower, a gas flow inlet is formed at the lower end of the tower body of each adsorbing tower, the two adsorbing towers form a gas flow channel through a pressure-sharing pipe, and the gas flow outlet of one of the two adsorbing towers is only communicated with the gas flow inlet of the other adsorbing tower when the two adsorbing towers are in pressure-sharing. Due to the fact that a top-bottom intersecting pressure-sharing mode is used for replacing the traditional top-top pressure-sharing and bottom-bottom pressure-sharing mode, gas pressure difference among ends of the two adsorbing towers is enabled to be small, a pressure-sharing effect is good, equipment finish product gas concentration is improved, gas yield is increased, and gas pipes are reasonably arranged, operation is convenient, and a basic gas guide function of the two adsorbing towers in a production process is achieved.

Description

technical field [0001] The invention relates to the technical field of gas separation equipment, in particular to a pressure equalization structure of double-tower gas separation equipment. Background technique [0002] Double-tower gas separation equipment (such as nitrogen generator and oxygen generator) includes two adsorption towers (A tower and B tower). When A tower is working, B tower is used for regeneration. After switching, B tower works and A tower is regenerated. To achieve uninterrupted work, during the switching process, the air pressure in Tower A and Tower B needs to be equalized. At present, the upper end of Tower A is connected to the upper end of Tower B, and the lower end of Tower A is connected to the lower end of Tower B to realize the connection between Tower A and Tower B. Pressure equalization from top to bottom and bottom to bottom, but the air pressure at the upper end of Tower A and Tower B is much greater than the air pressure at the lower end of...

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Problems solved by technology

[0002] Double-tower gas separation equipment (such as nitrogen and oxygen generators) includes two adsorption towers (A tower and B tower). When A tower is working, B tower is regenerated. After switching, B tower is working. A tower is regenerated, and the two towers are cycled. To achieve uninterrupted work, during the switching process, the air pressure in tower A and tower B needs to be equalized. At present, the upper end of tower A is connected to the upper end of tower B, and the lower end of tower A is connected to the lower end of tower B to realize the connection between tower A and tower B. Pressure equalization from top to bottom and bottom to bottom, but the air pressure at the upper end of Tower A and Tower B is much higher than the air pressure at the lower end of the two towers. Good pressure equalization effect, resulting in low product gas concentration and low gas production volume produced by the gas separation equipment

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