Oxygen and nitrogen compressor online switching device and control method thereof

Abstract

The invention discloses an oxygen and nitrogen compressor online switching device which comprises an air separation cold box, a low-pressure oxygen compressor and a medium-pressure nitrogen compressor. The low-pressure oxygen compressor and the medium-pressure nitrogen compressor are connected with an oxygen outlet and a nitrogen outlet in the air separation cold box through an oxygen inlet pipeline and a nitrogen inlet pipeline correspondingly. A first blind plate is arranged on the nitrogen inlet pipeline. A medium-pressure oxygen pipeline is arranged between the oxygen inlet pipeline and the nitrogen inlet pipeline. The two ends of the medium-pressure oxygen pipeline communicate with the oxygen inlet pipeline and the nitrogen inlet pipeline through T-pipes correspondingly. A second blind plate is arranged on the medium-pressure oxygen pipeline. An outlet of the low-pressure oxygen compressor and an outlet of the medium-pressure nitrogen compressor are provided with a low-pressure oxygen outlet pipeline and a medium-pressure nitrogen outlet pipeline correspondingly. The oxygen and nitrogen compressor online switching device is simple in structure and can switch oxygen and nitrogen, different mediums are compressed by means of the same equipment, the frontline gas supply requirement is met, the special supply retaining requirement at a failure state is met, and the safety coefficient and reliability coefficient of supply retaining of the equipment are increased.

Description

technical field [0001] The invention relates to an online switching device for an oxygen and nitrogen compressor and a control method thereof. Background technique [0002] The function of the oxygen and nitrogen compressors in the air separation oxygen system equipment is to meet the pressure and stability of the first-line gas demand. The equipment is all large-scale compressors. After the unit fails, the backup system must be purchased and then activated to ensure the supply. Economical The loss of benefits is relatively large, and in serious cases, it will affect the demand for front-line gas for a long time, and the safety technology requirements for the operation of oxygen compressors are higher. It is necessary to ensure the long-term stable and reliable operation of the system, but there are certain failure rates and risks in actual operation. . Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an oxygen a...

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Problems solved by technology

[0002] The function of the oxygen and nitrogen compressors in the air separation oxygen system equipment is to meet the pressure and stability of the first-line gas demand. The equipment is all large-scale compressors. After the unit fails, the backup system must be purchased and then activated to ensure the supply. Economical The loss of benefits is relatively large, and in serious cases, it will affect the demand for front-line gas for a long time, and the safety technology requirements for the operation of oxygen compressors are higher. It is necessary to ensure the long-term stable and reliable operation of the system, but there are certain failure rates and risks in actual operation.

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