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Lacy ring air filter for small air separation plants

Lacy ring air filter for small air separation plants
Jun 16, 2022
Author: DEAR AST

The Lacy ring air filter is a common type of wet filter for small air separation equipment. Its structure is that an insert box filled with Lacy rings is inserted in a steel box, and the Lacy rings are coated with filter oil with low freezing point. The Lacy rings in the insert box should be filled evenly, leaving no free space to prevent air from flowing through the empty space and affecting the filtering effect.
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With the rapid growth of liquid air separation plant production and sales, and the global energy crunch, the prospects for the use of liquid air separation plant cold energy are very broad. The use of liquid air separation plant cold energy should be developed in the direction of integration, fully integrated and effective use of liquid air separation plant cold energy liquid air separation units, using circulating nitrogen through the heat exchanger to recycle liquid air separation plant cold, ...
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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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