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What are the technical principles and functional characteristics of the AIPC in air separation equipment?

What are the technical principles and functional characteristics of the AIPC in air separation equipment?
Aug 04, 2025
Author: DEAR AST

The AIPC (Air Separation Plant Integrated Process Control) system refers to a control system for air separation plants that integrates advanced intelligent control technologies. Its core function is to enhance the stability, efficiency, and safety of air separation plant operations through real-time monitoring, adaptive control, and intelligent optimization, while simultaneously reducing energy consumption.
The AIPC system of the air separation equipment integrates multiple statistical analysis and intelligent load adjustment technologies to form a closed-loop control system. Real-time monitoring continuously collects equipment operating parameters through a sensor network to construct a dynamic data model. Condition recognition utilizes machine learning algorithms to analyze historical data and identify optimal control strategies under different operating conditions. Adaptive control automatically adjusts controller parameters based on real-time operating conditions to ensure stable control of key process indicators (such as oxygen and nitrogen purity). Intelligent optimization combines multivariable optimization control and energy balance technology to dynamically adjust equipment load, minimize energy consumption, and reduce overall energy consumption. Through adaptive control technology, the AIPC system can quickly respond to changes in operating conditions, control fluctuations in oxygen and nitrogen purity, ensure stable product gas quality, and improve efficiency, safety, and economy. Multiple statistical analysis identifies abnormal operating modes of the equipment, provides early warnings of potential failures, reduces unplanned downtime, and enhances operational efficiency and safety.
The intelligent operation and maintenance platform, with AIPC as its core component, combines industry-specific large models and intelligent robot technology to provide one-stop services such as remote monitoring, fault diagnosis, and predictive maintenance, thereby reducing operation and maintenance costs.

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Another part of the nitrogen vaporized in the liquefier is heated up to a certain temperature in the high pressure heat exchanger and pumped out to the low pressure nitrogen press, the nitrogen separated by the gas-liquid separator is also heated up by the high pressure heat exchanger and then goes to the low pressure nitrogen press, compressed to a certain pressure by the low pressure nitrogen press and then back to the high pressure heat exchanger for heat exchange with liquid air separat...
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Special pressure-bearing equipment generally bears internal pressure, that will cause tensile stress inside the shell, which is called working stress. The working stress is directly proportional to the pressure and diameter, and inversely proportional to the vessel wall thickness. The axial stress is half of the circumferential stress. Therefore, for cylindrical vessels, the stress of longitudinal weld is twice that of girth weld. Because the geometric shape of the spherical shell is symmetrical to the spherical center, and the axial stress is equal to the circumferential stress in numerical value. Therefore, the wall thickness of the spherical vessel can be reduced by half as much as that of the cylindrical vessel under the same pressure and diameter.
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