One-button start-stop control method for external compression air separation device with argon

Abstract

The invention relates to a one-button start-stop control method for an external compression air separation device with argon, and relates to the technical field of air separation equipment automationengineering. The external compression air separation device with the argon comprises an air compressor system, an air precooling system, a molecular sieve purification system, an expander system, an oxygen nitrogen distillation system and an argon distillation system. According to the one-button start-stop control method, when an operator presses a one-button start-stop soft button, a DCS or PLC system completes the full automatic start-stop of each system of the device according to the steps, the tedious start-up and stop operation process of the external compression air separation device with the argon is simplified to one-click operation, the labor cost is effectively reduced, the start-up and stop time of the device is shortened, and production can be quickly resumed after the device bumps.

Description

technical field [0001] The invention relates to the technical field of automation engineering of air separation equipment, in particular to a one-button start-stop control method of an argon air separation unit with external compression. Background technique [0002] Air separation units with external compression and argon generally use molecular sieves to purify air, turbo expanders with pressurization, external compression of oxygen and nitrogen, and full rectification to produce argon without hydrogen. [0003] After removing dust and mechanical impurities in the filter, the raw air enters the air turbine compressor to be compressed to the required pressure, and then sent to the air cooling tower for cleaning and precooling. Air enters from the lower part of the air cooling tower and exits from the top. The water supply of the air-cooling tower is divided into two sections. The lower section of the air-cooling tower uses circulating water cooled by the water treatment ...

AI Technical Summary

Problems solved by technology

[0008] The start-up and shutdown process of the existing externally compressed argon air separation unit is generally carried out by the operator in the central control room through the handheld communication device according to the display parameters of temperature, pressure, flow, liquid level and analysis measuring points on the DCS or PLC system operation station. The equipment cooperates with the on-site operators to jointly perform remote or on-site operations on the valves, motors, and equipment of the air separation unit. The start-up and stop process requires a large number of professional operators to work together. The operators have high labor intensity and are prone to misoperation. The process takes a long time, and the recovery of the production status of the device is slow

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