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Enthalpy during oxygen production

Enthalpy during oxygen production
Aug 17, 2022
Author: DEAR AST

The sum of the kinetic energy of the irregular movement of molecules in a substance and the potential energy generated by the mutual attraction between molecules is called thermodynamic energy. In the process of oxygen production, there are often flow processes such as compression, expansion, heating and cooling. These processes not only involve the change of material thermodynamic energy, but also involve the transformation between material flow energy and thermodynamic energy. Han is the sum of material thermodynamic energy and material flow, so it is more convenient to study these flow processes with Han.

In the kdon-300 / 3000 (100y) air separation equipment supplied by Kaifeng DEAR air separation plant to Shandong Kenli Petrochemical Company, deer design and Research Institute independently developed a remote optimization control and diagnosis system for large-scale air separation plant. The system includes eight modules, including a continuous vibration sampling and analysis module; Field dynamic balance software module; Unit online monitoring module and unit vibration self diagnosis module; Electrical fault diagnosis module; Intelligent air separation bearing library module; Simulated fault training module; Noise signal detection power module. It has the functions of on-site analysis, fault discrimination, data management, trend analysis, etc., and integrates the experience of on-site analysis and diagnosis. It is flexible, convenient and easy to operate.

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When the amount of processing air is reduced, the rising steam and reflux liquid in the upper column will be reduced, but the reflux ratio will not change. Therefore, the reduction of processing air in a small range will not affect the purity of oxygen and nitrogen, and the reduction of processing air volume will help to reduce the pressure of the upper and lower columns. However, according to the material balance, the production of oxygen and nitrogen will naturally decrease when the amount of processing air is reduced. If the amount of processing air is too small, there will be leakage on the tray. If the heat and mass exchange of the leaked liquid is not sufficient, the purity of oxygen and nitrogen will be greatly affected, and even the normal production can not be realized. Therefore, the minimum allowable load of distillation column is generally specified.
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