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Air separation device for supplying cold energy for preparing liquid oxygen by utilizing liquid nitrogen backward filling

A technology of air separation plant and liquid nitrogen, which is applied in the directions of liquefaction, refrigeration, liquefaction, and solidification, and can solve problems such as the inability to meet the needs of producing liquid oxygen.

Inactive Publication Date: 2012-12-19
ZHEJIANG HAITIAN GAS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, the main products of the air separation plant with this structure are nitrogen and oxygen, which cannot meet the needs of producing liquid oxygen

Method used

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  • Air separation device for supplying cold energy for preparing liquid oxygen by utilizing liquid nitrogen backward filling

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Embodiment Construction

[0007] Below in conjunction with accompanying drawing, the present invention will be further described with specific embodiment;

[0008] Such as figure 1 As shown, the air separation unit that utilizes liquid nitrogen backflow to provide cold capacity to produce liquid oxygen includes a rectification tower 1 with an upper tower 11 and a condensation evaporator 2 arranged in the rectification tower, and also includes a liquid nitrogen storage tank 3, Liquid nitrogen delivery valve (not shown in the figure), liquid nitrogen delivery pipeline 4 for transporting liquid nitrogen to the upper tower, liquid oxygen storage tank 5, liquid oxygen delivery valve (not shown in the figure), used for supplying liquid oxygen to the tower The liquid oxygen delivery pipeline 6 for transporting liquid oxygen in the storage tank. One end of the liquid nitrogen delivery pipeline 4 communicates with the upper tower 11 , and the other end of the liquid nitrogen delivery pipeline 4 communicates wi...

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Abstract

The invention relates to an air separation device for supplying cold energy for preparing liquid oxygen by utilizing liquid nitrogen backward filling. The air separation device is used for solving the technical problem of directly producing collectable liquid oxygen products by using a rectifying tower. The air separation device comprises the rectifying tower, a condensing evaporator, a liquid nitrogen storage tank, a liquid nitrogen conveying valve, a liquid nitrogen conveying pipeline, a liquid oxygen storage tank, a liquid oxygen conveying valve and a liquid oxygen conveying pipeline, wherein the rectifying tower is provided with an upper tower; the condensing evaporator is arranged in the rectifying tower; the liquid nitrogen conveying pipeline is used for conveying the liquid nitrogen to the upper tower; the liquid oxygen conveying pipeline is used for conveying liquid oxygen to the liquid oxygen storage tank; one end of the liquid nitrogen conveying pipeline is communicated with the upper tower; the other end of the liquid nitrogen conveying pipeline is communicated with the liquid nitrogen storage tank; the liquid nitrogen conveying valve is arranged on the liquid nitrogen conveying pipeline; one end of the liquid oxygen conveying pipeline is communicated with the evaporating side of the condensing evaporator; the other end of the liquid oxygen conveying pipeline is communicated with the liquid oxygen storage tank; and the liquid oxygen conveying valve is arranged on the liquid oxygen conveying pipeline.

Description

technical field [0001] The invention belongs to the technical field of air separation equipment, and in particular relates to an air separation device which utilizes liquid nitrogen backflow to provide cooling capacity to prepare liquid oxygen. Background technique [0002] Air separation plant, simply put, is a set of industrial equipment used to separate the components in the air to produce oxygen, nitrogen and argon. It includes air filtration system, air compressor system, air pre-cooling system, air purification system, air compression expansion system, air separation system, oxygen compression system, nitrogen compression system, etc. Among them, for the air separation system used to separate nitrogen and oxygen, it should be composed of rectification tower system. In the lower column of the rectification column, the ascending gas fully contacts with the downstream liquid, and after heat and mass transfer, pure nitrogen is obtained at the top, and the pure nitrogen en...

Claims

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Application Information

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IPC IPC(8): F25J3/04
Inventor 陈崇文
Owner ZHEJIANG HAITIAN GAS
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