Apparatnoe oformlenie energosberegayushchey sistemy razdeleniya vozdukha
Larisa Vasil'evna Galimova , Ivan Evgen'vich Sedoykin , Artem Igorevich Kobozev , Roman Borisovich Slavin
Refrigeration Technology ›› 2015, Vol. 104 ›› Issue (2) : 45 -48.
Apparatnoe oformlenie energosberegayushchey sistemy razdeleniya vozdukha
The air separation plant KzhAzh0,04 was investigated. During the separation process heat emission occurs that influences negatively the production process in frostfree season. The most heat emission is linked with the compaction process as a result of which compressible air is heated up to 180...230 °С. To refrigerate air after each stage of the compressor the doublepipe heat exchangers are placed, they are refrigerated using a refrigerating cooling tower. The air temperature after the end heat exchange is of 35...42 °C that is higher by 10...15°С in comparison with the regulated temperatures. So the quality of oxygen produced is reduced. To achieve the regulated temperatures before the adsorber of the air separation plant the energy save system is placed, it includes an absorption refrigerating machine (ARM), a boilerutilizer, a water heat exchanger and an air prerefrigeration heat exchanger. On the grounds of the ARM thermal design the heat loads on all components as well as the required refrigerating capacity of the machine that is 23 kW are determined. Using the catalogue a new generation ARM -VST23 by “BROAD” firm is chosen. The calculations were carried out, the performances of the boilerutilizer, an air prerefrigeration heat exchanger as well as a water heat exchanger were obtained. Keywords: energy saving, air separation, plants, oxigen, ammonia, absoption refrigerating mashine.
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