METHOD OF TREATING A PYROGAS BEFORE GAS SEPARATION; METHOD OF OBTAINING INDUSTRIAL LOW TEMPERATURES IN A VAPOUR COMPRESSION REFRIGERATION MACHINE BY TREATING THE PYROGAS BEFORE GAS SEPARATION

摘要

The invention concerns a method of treating a pyrogas before gas separation. The proposed method ensures highly economical operation owing to the low energy requirements for compressing the pyrogas and low consumption of cooling water. This results from the relatively low pyrogas temperature and low pressure losses during the multistage compression, which in turn results from the organisation of the processes of cooling, by contact heat exchange between the pyrogas, flushing water and an operating fluid, cooling these components with an external medium in refrigeration units and with a cold carrier in the evaporators of absorption machines, and by preliminary cooling of the flushing water in the generators of these machines. The proposed method of obtaining industrial low temperatures in a vapour compression refrigeration machine is characterised by a high refrigeration coefficient and low consumption of cooling water. This is made possible by the transfer of the heat of condensation of the refrigerant to the atmospheric air and by supercooling the liquid refrigerant before the expansion processes using an absorption refrigeration machine and exploiting the heat carried away from the pyrogas by the flushing water in the column.