Apparatus and Integrated Process for Separating a Mixture of Carbon Dioxide and at Least One Other Gas and for Separating Air by Cryogenic Distillation
a technology of carbon dioxide and air separation, which is applied in the direction of separation processes, lighting and heating apparatus, liquefaction, etc., can solve the problems of real risk of introducing cosub>2 /sub>into the apparatus for separating air and clogging, and achieve the effect of lowering the temperature of unvaporized water
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[0056]The invention shall be described in more detail by referring to the figures.
[0057]FIG. 1 shows an apparatus and an integrated process for separating a mixture of carbon dioxide and at least one other gas and for separating air by cryogenic distillation according to the invention. FIGS. 2 to 4 show the details of various water cooling towers used to cool the air upstream of the air separation by distillation in FIG. 1, according to the invention. In FIG. 1, a stream of air 1 is cooled in a pre-cooling unit P comprising an air scrubbing tower with water and a water cooling tower with nitrogen 17. This type of cooling is well known in the “Industrial Gas Handbook” by F. G. Kerry, page 112. The air 3 cooled in the pre-cooling unit P is sent to an apparatus for separating air ASU wherein it is purified in order to remove the carbon dioxide and the moisture, cooled and separated in a system of columns in order to produce oxygen 5 and nitrogen 17. The oxygen 5 is sent to an oxy-fuel com
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