An air separation device and method capable of exchanging the internal and external compression processes of oxygen

Abstract

The invention belongs to the technical field of air separation, and is specifically an air separation device and method capable of exchanging internal and external compression processes of oxygen, including a self-cleaning filter, a centrifugal compressor, a precooling system, a molecular purifier, an air Supercharger, turbo expander, rectification tower, liquid oxygen pump, main heat exchanger and oxygen compressor, the self-cleaning filter is connected with the centrifugal compressor through the pipeline, and the centrifugal compressor is connected through the pipeline It is connected with the pre-cooling system, and the said pre-cooling system is connected with the molecular purifier through pipelines. Compared with the traditional air separation equipment, this device has fewer structures, which not only makes the operation simpler, but also facilitates the maintenance of the equipment. In addition, the reduction in the number of structures can also reduce the volume of the equipment, thereby facilitating the placement and installation of the air separation equipment.

Description

technical field [0001] The invention relates to the technical field of air separation, in particular to an air separation device and method capable of realizing interchangeability of internal and external compression processes of oxygen. Background technique [0002] The air separation unit must have a compression system, a pre-cooling system, a purification system, a heat exchange system, and a rectification system. The main difference between the existing internal and external compression processes lies in rectification and heat exchange. The difference between the two is as follows: the external compression process : 1. The state of the oxygen out of the cold box is a low-pressure state, and the oxygen is pressurized by the oxygen compressor and then sent to the user; 2. Most of the air coming from the molecular sieve purifier enters the middle of the upper tower for rectification after being expanded by the expander, while Another small part of the bypass enters the sewa...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an air separation device and method capable of exchanging internal and external compression processes of oxygen, so as to solve the problem that two sets of heat exchange systems and two sets of rectification systems need to be installed in the existing air separation device proposed in the above-mentioned background technology system problem

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